diff --git a/flake.nix b/flake.nix
index b09b6a5a4a0b..3e07aa1cd469 100644
--- a/flake.nix
+++ b/flake.nix
@@ -47,7 +47,7 @@
       checks = forAllSystems (system: {
         tarball = jobs.${system}.tarball;
         # Exclude power64 due to "libressl is not available on the requested hostPlatform" with hostPlatform being power64
-      } // lib.optionalAttrs (self.legacyPackages.${system}.stdenv.isLinux && !self.legacyPackages.${system}.targetPlatform.isPower64) {
+      } // lib.optionalAttrs (self.legacyPackages.${system}.stdenv.hostPlatform.isLinux && !self.legacyPackages.${system}.targetPlatform.isPower64) {
         # Test that ensures that the nixosSystem function can accept a lib argument
         # Note: prefer not to extend or modify `lib`, especially if you want to share reusable modules
         #       alternatives include: `import` a file, or put a custom library in an option or in `_module.args.<libname>`
diff --git a/lib/tests/test-with-nix.nix b/lib/tests/test-with-nix.nix
index 1316aaa49b88..a6aee9859428 100644
--- a/lib/tests/test-with-nix.nix
+++ b/lib/tests/test-with-nix.nix
@@ -33,7 +33,7 @@ pkgs.runCommand "nixpkgs-lib-tests-nix-${nix.version}" {
   nativeBuildInputs = [
     nix
     pkgs.gitMinimal
-  ] ++ lib.optional pkgs.stdenv.isLinux pkgs.inotify-tools;
+  ] ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.inotify-tools;
   strictDeps = true;
 } ''
   datadir="${nix}/share"
diff --git a/maintainers/scripts/convert-to-import-cargo-lock/shell.nix b/maintainers/scripts/convert-to-import-cargo-lock/shell.nix
index fc2e2348309d..2938cf2d0c0b 100644
--- a/maintainers/scripts/convert-to-import-cargo-lock/shell.nix
+++ b/maintainers/scripts/convert-to-import-cargo-lock/shell.nix
@@ -13,5 +13,5 @@ mkShell {
       clippy
       rustfmt
     ]
-    ++ lib.optional stdenv.isDarwin pkgs.libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin pkgs.libiconv;
 }
diff --git a/nixos/modules/config/fonts/fontconfig.nix b/nixos/modules/config/fonts/fontconfig.nix
index 7b58d3adc22b..205fd1fa7b96 100644
--- a/nixos/modules/config/fonts/fontconfig.nix
+++ b/nixos/modules/config/fonts/fontconfig.nix
@@ -52,7 +52,7 @@ let
         ${lib.optionalString (pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform) ''
         <!-- Pre-generated font caches -->
         <cachedir>${cache}</cachedir>
-        ${lib.optionalString (pkgs.stdenv.isx86_64 && cfg.cache32Bit) ''
+        ${lib.optionalString (pkgs.stdenv.hostPlatform.isx86_64 && cfg.cache32Bit) ''
           <cachedir>${cache32}</cachedir>
         ''}
         ''}
diff --git a/nixos/modules/config/ldso.nix b/nixos/modules/config/ldso.nix
index 60156dd04098..f8d89db0220e 100644
--- a/nixos/modules/config/ldso.nix
+++ b/nixos/modules/config/ldso.nix
@@ -32,7 +32,7 @@ in {
 
   config = {
     assertions = [
-      { assertion = isNull config.environment.ldso32 || pkgs.stdenv.isx86_64;
+      { assertion = isNull config.environment.ldso32 || pkgs.stdenv.hostPlatform.isx86_64;
         message = "Option environment.ldso32 currently only works on x86_64.";
       }
     ];
@@ -44,7 +44,7 @@ in {
         "d /${libDir} 0755 root root - -"
         "L+ /${libDir}/${ldsoBasename} - - - - ${config.environment.ldso}"
       ]
-    ) ++ optionals pkgs.stdenv.isx86_64 (
+    ) ++ optionals pkgs.stdenv.hostPlatform.isx86_64 (
       if isNull config.environment.ldso32 then [
         "r /${libDir32}/${ldsoBasename32} - - - - -"
       ] else [
diff --git a/nixos/modules/config/pulseaudio.nix b/nixos/modules/config/pulseaudio.nix
index 6a6aeaab6541..6e6e577e6e20 100644
--- a/nixos/modules/config/pulseaudio.nix
+++ b/nixos/modules/config/pulseaudio.nix
@@ -12,7 +12,7 @@ let
 
   # Forces 32bit pulseaudio and alsa-plugins to be built/supported for apps
   # using 32bit alsa on 64bit linux.
-  enable32BitAlsaPlugins = cfg.support32Bit && pkgs.stdenv.isx86_64 && (pkgs.pkgsi686Linux.alsa-lib != null && pkgs.pkgsi686Linux.libpulseaudio != null);
+  enable32BitAlsaPlugins = cfg.support32Bit && pkgs.stdenv.hostPlatform.isx86_64 && (pkgs.pkgsi686Linux.alsa-lib != null && pkgs.pkgsi686Linux.libpulseaudio != null);
 
 
   myConfigFile =
diff --git a/nixos/modules/config/stub-ld.nix b/nixos/modules/config/stub-ld.nix
index 87b7bdf07a2d..05945852ee45 100644
--- a/nixos/modules/config/stub-ld.nix
+++ b/nixos/modules/config/stub-ld.nix
@@ -49,7 +49,7 @@ in {
 
   config = mkIf cfg.enable {
     environment.ldso = mkDefault stub-ld;
-    environment.ldso32 = mkIf pkgs.stdenv.isx86_64 (mkDefault stub-ld32);
+    environment.ldso32 = mkIf pkgs.stdenv.hostPlatform.isx86_64 (mkDefault stub-ld32);
   };
 
   meta.maintainers = with lib.maintainers; [ tejing ];
diff --git a/nixos/modules/hardware/graphics.nix b/nixos/modules/hardware/graphics.nix
index 99c122f75c2a..170ca85a99a2 100644
--- a/nixos/modules/hardware/graphics.nix
+++ b/nixos/modules/hardware/graphics.nix
@@ -100,7 +100,7 @@ in
   config = lib.mkIf cfg.enable {
     assertions = [
       {
-        assertion = cfg.enable32Bit -> pkgs.stdenv.isx86_64;
+        assertion = cfg.enable32Bit -> pkgs.stdenv.hostPlatform.isx86_64;
         message = "`hardware.graphics.enable32Bit` only makes sense on a 64-bit system.";
       }
       {
@@ -112,7 +112,7 @@ in
     systemd.tmpfiles.settings.graphics-driver = {
       "/run/opengl-driver"."L+".argument = toString driversEnv;
       "/run/opengl-driver-32" =
-        if pkgs.stdenv.isi686 then
+        if pkgs.stdenv.hostPlatform.isi686 then
           { "L+".argument = "opengl-driver"; }
         else if cfg.enable32Bit then
           { "L+".argument = toString driversEnv32; }
diff --git a/nixos/modules/profiles/all-hardware.nix b/nixos/modules/profiles/all-hardware.nix
index 249b767593f2..970b76cfbfdf 100644
--- a/nixos/modules/profiles/all-hardware.nix
+++ b/nixos/modules/profiles/all-hardware.nix
@@ -52,7 +52,7 @@ in
       # VMware support.
       "mptspi" "vmxnet3" "vsock"
     ] ++ lib.optional platform.isx86 "vmw_balloon"
-    ++ lib.optionals (pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64) [
+    ++ lib.optionals (pkgs.stdenv.hostPlatform.isi686 || pkgs.stdenv.hostPlatform.isx86_64) [
       "vmw_vmci" "vmwgfx" "vmw_vsock_vmci_transport"
 
       # Hyper-V support.
@@ -68,7 +68,7 @@ in
 
       # Broadcom
       "vc4"
-    ] ++ lib.optionals pkgs.stdenv.isAarch64 [
+    ] ++ lib.optionals pkgs.stdenv.hostPlatform.isAarch64 [
       # Most of the following falls into two categories:
       #  - early KMS / early display
       #  - early storage (e.g. USB) support
diff --git a/nixos/modules/services/audio/jack.nix b/nixos/modules/services/audio/jack.nix
index a5cb0da29592..7344fdf4a218 100644
--- a/nixos/modules/services/audio/jack.nix
+++ b/nixos/modules/services/audio/jack.nix
@@ -8,7 +8,7 @@ let
   pcmPlugin = cfg.jackd.enable && cfg.alsa.enable;
   loopback = cfg.jackd.enable && cfg.loopback.enable;
 
-  enable32BitAlsaPlugins = cfg.alsa.support32Bit && pkgs.stdenv.isx86_64 && pkgs.pkgsi686Linux.alsa-lib != null;
+  enable32BitAlsaPlugins = cfg.alsa.support32Bit && pkgs.stdenv.hostPlatform.isx86_64 && pkgs.pkgsi686Linux.alsa-lib != null;
 
   umaskNeeded = versionOlder cfg.jackd.package.version "1.9.12";
   bridgeNeeded = versionAtLeast cfg.jackd.package.version "1.9.12";
diff --git a/nixos/modules/services/desktops/pipewire/pipewire.nix b/nixos/modules/services/desktops/pipewire/pipewire.nix
index bf57d1255774..532c64c0f424 100644
--- a/nixos/modules/services/desktops/pipewire/pipewire.nix
+++ b/nixos/modules/services/desktops/pipewire/pipewire.nix
@@ -19,7 +19,7 @@ let
   '';
   cfg = config.services.pipewire;
   enable32BitAlsaPlugins = cfg.alsa.support32Bit
-                           && pkgs.stdenv.isx86_64
+                           && pkgs.stdenv.hostPlatform.isx86_64
                            && pkgs.pkgsi686Linux.pipewire != null;
 
   # The package doesn't output to $out/lib/pipewire directly so that the
diff --git a/nixos/modules/services/logging/promtail.nix b/nixos/modules/services/logging/promtail.nix
index 9eccd34cef23..644a93214516 100644
--- a/nixos/modules/services/logging/promtail.nix
+++ b/nixos/modules/services/logging/promtail.nix
@@ -80,7 +80,7 @@ in {
         PrivateUsers = true;
 
         SupplementaryGroups = lib.optional (allowSystemdJournal) "systemd-journal";
-      } // (optionalAttrs (!pkgs.stdenv.isAarch64) { # FIXME: figure out why this breaks on aarch64
+      } // (optionalAttrs (!pkgs.stdenv.hostPlatform.isAarch64) { # FIXME: figure out why this breaks on aarch64
         SystemCallFilter = "@system-service";
       });
     };
diff --git a/nixos/modules/services/misc/mame.nix b/nixos/modules/services/misc/mame.nix
index 054a7803b9c4..ed98ef3ed8a6 100644
--- a/nixos/modules/services/misc/mame.nix
+++ b/nixos/modules/services/misc/mame.nix
@@ -1,7 +1,7 @@
 { config, lib, pkgs, ... }:
 let
   cfg = config.services.mame;
-  mame = "mame${lib.optionalString pkgs.stdenv.is64bit "64"}";
+  mame = "mame${lib.optionalString pkgs.stdenv.hostPlatform.is64bit "64"}";
 in
 {
   options = {
diff --git a/nixos/modules/services/misc/tabby.nix b/nixos/modules/services/misc/tabby.nix
index d63a6b24ae3d..8fabd10d90fa 100644
--- a/nixos/modules/services/misc/tabby.nix
+++ b/nixos/modules/services/misc/tabby.nix
@@ -71,7 +71,7 @@ in
 
           - nixpkgs.config.cudaSupport
           - nixpkgs.config.rocmSupport
-          - if stdenv.isDarwin && stdenv.isAarch64
+          - if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64
 
           IFF multiple acceleration methods are found to be enabled or if you
           haven't set either `cudaSupport or rocmSupport` you will have to
diff --git a/nixos/modules/services/networking/cjdns.nix b/nixos/modules/services/networking/cjdns.nix
index a7f39b379181..6aaaf6295068 100644
--- a/nixos/modules/services/networking/cjdns.nix
+++ b/nixos/modules/services/networking/cjdns.nix
@@ -274,7 +274,7 @@ in
         CapabilityBoundingSet = "CAP_NET_ADMIN CAP_NET_RAW CAP_SETUID";
         ProtectSystem = true;
         # Doesn't work on i686, causing service to fail
-        MemoryDenyWriteExecute = !pkgs.stdenv.isi686;
+        MemoryDenyWriteExecute = !pkgs.stdenv.hostPlatform.isi686;
         ProtectHome = true;
         PrivateTmp = true;
       };
diff --git a/nixos/modules/services/networking/nsd.nix b/nixos/modules/services/networking/nsd.nix
index b17416c1e3d3..fe878ddbe05f 100644
--- a/nixos/modules/services/networking/nsd.nix
+++ b/nixos/modules/services/networking/nsd.nix
@@ -603,8 +603,8 @@ in
 
     reuseport = mkOption {
       type = types.bool;
-      default = pkgs.stdenv.isLinux;
-      defaultText = literalExpression "pkgs.stdenv.isLinux";
+      default = pkgs.stdenv.hostPlatform.isLinux;
+      defaultText = literalExpression "pkgs.stdenv.hostPlatform.isLinux";
       description = ''
         Whether to enable SO_REUSEPORT on all used sockets. This lets multiple
         processes bind to the same port. This speeds up operation especially
diff --git a/nixos/modules/services/video/frigate.nix b/nixos/modules/services/video/frigate.nix
index 5c259b7fa14d..b3f38eba6642 100644
--- a/nixos/modules/services/video/frigate.nix
+++ b/nixos/modules/services/video/frigate.nix
@@ -518,7 +518,7 @@ in
         libva-utils
         procps
         radeontop
-      ] ++ lib.optionals (!stdenv.isAarch64) [
+      ] ++ lib.optionals (!stdenv.hostPlatform.isAarch64) [
         # not available on aarch64-linux
         intel-gpu-tools
       ];
diff --git a/nixos/modules/system/boot/stage-1.nix b/nixos/modules/system/boot/stage-1.nix
index 082380216d2a..b3237aa7f04e 100644
--- a/nixos/modules/system/boot/stage-1.nix
+++ b/nixos/modules/system/boot/stage-1.nix
@@ -327,7 +327,7 @@ let
 
     setHostId = optionalString (config.networking.hostId != null) ''
       hi="${config.networking.hostId}"
-      ${if pkgs.stdenv.isBigEndian then ''
+      ${if pkgs.stdenv.hostPlatform.isBigEndian then ''
         echo -ne "\x''${hi:0:2}\x''${hi:2:2}\x''${hi:4:2}\x''${hi:6:2}" > /etc/hostid
       '' else ''
         echo -ne "\x''${hi:6:2}\x''${hi:4:2}\x''${hi:2:2}\x''${hi:0:2}" > /etc/hostid
diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index bb6fcc1d38ce..c7f3e5845f54 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -679,7 +679,7 @@ in
 
     # Increase numeric PID range (set directly instead of copying a one-line file from systemd)
     # https://github.com/systemd/systemd/pull/12226
-    boot.kernel.sysctl."kernel.pid_max" = mkIf pkgs.stdenv.is64bit (lib.mkDefault 4194304);
+    boot.kernel.sysctl."kernel.pid_max" = mkIf pkgs.stdenv.hostPlatform.is64bit (lib.mkDefault 4194304);
 
     services.logrotate.settings = {
       "/var/log/btmp" = mapAttrs (_: mkDefault) {
diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix
index 7e3e24c727b2..c9ea31a85bee 100644
--- a/nixos/modules/tasks/network-interfaces.nix
+++ b/nixos/modules/tasks/network-interfaces.nix
@@ -438,7 +438,7 @@ let
 
   hostidFile = pkgs.runCommand "gen-hostid" { preferLocalBuild = true; } ''
       hi="${cfg.hostId}"
-      ${if pkgs.stdenv.isBigEndian then ''
+      ${if pkgs.stdenv.hostPlatform.isBigEndian then ''
         echo -ne "\x''${hi:0:2}\x''${hi:2:2}\x''${hi:4:2}\x''${hi:6:2}" > $out
       '' else ''
         echo -ne "\x''${hi:6:2}\x''${hi:4:2}\x''${hi:2:2}\x''${hi:0:2}" > $out
diff --git a/nixos/modules/virtualisation/docker.nix b/nixos/modules/virtualisation/docker.nix
index d6d775998119..4f38bc0b94d6 100644
--- a/nixos/modules/virtualisation/docker.nix
+++ b/nixos/modules/virtualisation/docker.nix
@@ -244,7 +244,7 @@ in
       };
 
       assertions = [
-        { assertion = cfg.enableNvidia && pkgs.stdenv.isx86_64 -> config.hardware.graphics.enable32Bit or false;
+        { assertion = cfg.enableNvidia && pkgs.stdenv.hostPlatform.isx86_64 -> config.hardware.graphics.enable32Bit or false;
           message = "Option enableNvidia on x86_64 requires 32-bit support libraries";
         }];
 
diff --git a/nixos/modules/virtualisation/xen-dom0.nix b/nixos/modules/virtualisation/xen-dom0.nix
index fa2cf2b2c6d5..2cc82c910110 100644
--- a/nixos/modules/virtualisation/xen-dom0.nix
+++ b/nixos/modules/virtualisation/xen-dom0.nix
@@ -605,7 +605,7 @@ in
   config = lib.modules.mkIf cfg.enable {
     assertions = [
       {
-        assertion = pkgs.stdenv.isx86_64;
+        assertion = pkgs.stdenv.hostPlatform.isx86_64;
         message = "Xen is currently not supported on ${pkgs.stdenv.hostPlatform.system}.";
       }
       {
diff --git a/nixos/tests/filesender.nix b/nixos/tests/filesender.nix
index 9274ddbf7e90..346e315956fb 100644
--- a/nixos/tests/filesender.nix
+++ b/nixos/tests/filesender.nix
@@ -2,7 +2,7 @@ import ./make-test-python.nix ({ pkgs, lib, ... }: {
   name = "filesender";
   meta = {
     maintainers = with lib.maintainers; [ nhnn ];
-    broken = pkgs.stdenv.isAarch64; # selenium.common.exceptions.WebDriverException: Message: Unsupported platform/architecture combination: linux/aarch64
+    broken = pkgs.stdenv.hostPlatform.isAarch64; # selenium.common.exceptions.WebDriverException: Message: Unsupported platform/architecture combination: linux/aarch64
   };
 
   nodes.filesender = { ... }: let
diff --git a/nixos/tests/freetube.nix b/nixos/tests/freetube.nix
index c0beeeaae61f..4b5b2ed343f1 100644
--- a/nixos/tests/freetube.nix
+++ b/nixos/tests/freetube.nix
@@ -24,7 +24,7 @@ let
       nodes = { "${name}" = machine; };
       meta.maintainers = with pkgs.lib.maintainers; [ kirillrdy ];
       # time-out on ofborg
-      meta.broken = pkgs.stdenv.isAarch64;
+      meta.broken = pkgs.stdenv.hostPlatform.isAarch64;
       enableOCR = true;
 
       testScript = ''
diff --git a/nixos/tests/installed-tests/gdk-pixbuf.nix b/nixos/tests/installed-tests/gdk-pixbuf.nix
index 110efdbf710f..a86c20b0fbeb 100644
--- a/nixos/tests/installed-tests/gdk-pixbuf.nix
+++ b/nixos/tests/installed-tests/gdk-pixbuf.nix
@@ -6,7 +6,7 @@ makeInstalledTest {
   testConfig = {
     # Tests allocate a lot of memory trying to exploit a CVE
     # but qemu-system-i386 has a 2047M memory limit
-    virtualisation.memorySize = if pkgs.stdenv.isi686 then 2047 else 4096;
+    virtualisation.memorySize = if pkgs.stdenv.hostPlatform.isi686 then 2047 else 4096;
   };
 
   testRunnerFlags = [ "--timeout" "1800" ];
diff --git a/nixos/tests/k3s/multi-node.nix b/nixos/tests/k3s/multi-node.nix
index bc06ad858d8c..58b98b2a1853 100644
--- a/nixos/tests/k3s/multi-node.nix
+++ b/nixos/tests/k3s/multi-node.nix
@@ -189,7 +189,7 @@ import ../make-test-python.nix (
           m.start()
           m.wait_for_unit("k3s")
 
-      is_aarch64 = "${toString pkgs.stdenv.isAarch64}" == "1"
+      is_aarch64 = "${toString pkgs.stdenv.hostPlatform.isAarch64}" == "1"
 
       # wait for the agent to show up
       server.wait_until_succeeds("k3s kubectl get node agent")
diff --git a/nixos/tests/libvirtd.nix b/nixos/tests/libvirtd.nix
index 27ffaac3e62d..0b068d5a2f08 100644
--- a/nixos/tests/libvirtd.nix
+++ b/nixos/tests/libvirtd.nix
@@ -30,7 +30,7 @@ import ./make-test-python.nix ({ pkgs, ... }: {
 
   testScript = let
     nixosInstallISO = (import ../release.nix {}).iso_minimal.${pkgs.stdenv.hostPlatform.system};
-    virshShutdownCmd = if pkgs.stdenv.isx86_64 then "shutdown" else "destroy";
+    virshShutdownCmd = if pkgs.stdenv.hostPlatform.isx86_64 then "shutdown" else "destroy";
   in ''
     start_all()
 
diff --git a/nixos/tests/pulseaudio.nix b/nixos/tests/pulseaudio.nix
index dc8e33ccd559..ccc33f28bc6d 100644
--- a/nixos/tests/pulseaudio.nix
+++ b/nixos/tests/pulseaudio.nix
@@ -40,7 +40,7 @@ let
             };
 
             environment.systemPackages = [ testers.testPlay pkgs.pavucontrol ]
-              ++ lib.optional pkgs.stdenv.isx86_64 testers.testPlay32;
+              ++ lib.optional pkgs.stdenv.hostPlatform.isx86_64 testers.testPlay32;
           } // lib.optionalAttrs systemWide {
             users.users.alice.extraGroups = [ "pulse-access" ];
             systemd.services.pulseaudio.wantedBy = [ "multi-user.target" ];
@@ -54,7 +54,7 @@ let
 
           machine.send_chars("testPlay \n")
           machine.wait_for_file("/tmp/testPlay_success")
-          ${lib.optionalString pkgs.stdenv.isx86_64 ''
+          ${lib.optionalString pkgs.stdenv.hostPlatform.isx86_64 ''
             machine.send_chars("testPlay32 \n")
             machine.wait_for_file("/tmp/testPlay32_success")
           ''}
diff --git a/nixos/tests/stub-ld.nix b/nixos/tests/stub-ld.nix
index 72b0aebf3e6c..f34e082cfd22 100644
--- a/nixos/tests/stub-ld.nix
+++ b/nixos/tests/stub-ld.nix
@@ -18,7 +18,7 @@ import ./make-test-python.nix ({ lib, pkgs, ... }: {
     libDir = pkgs.stdenv.hostPlatform.libDir;
     ldsoBasename = lib.last (lib.splitString "/" pkgs.stdenv.cc.bintools.dynamicLinker);
 
-    check32 = pkgs.stdenv.isx86_64;
+    check32 = pkgs.stdenv.hostPlatform.isx86_64;
     pkgs32 = pkgs.pkgsi686Linux;
 
     libDir32 = pkgs32.stdenv.hostPlatform.libDir;
diff --git a/nixos/tests/sunshine.nix b/nixos/tests/sunshine.nix
index 7c7e86de203a..a1207bfa49f7 100644
--- a/nixos/tests/sunshine.nix
+++ b/nixos/tests/sunshine.nix
@@ -2,7 +2,7 @@ import ./make-test-python.nix ({ pkgs, lib, ... }: {
   name = "sunshine";
   meta = {
     # test is flaky on aarch64
-    broken = pkgs.stdenv.isAarch64;
+    broken = pkgs.stdenv.hostPlatform.isAarch64;
     maintainers = [ lib.maintainers.devusb ];
   };
 
diff --git a/nixos/tests/wine.nix b/nixos/tests/wine.nix
index 7cbe7ac94f1e..7fc98c23c042 100644
--- a/nixos/tests/wine.nix
+++ b/nixos/tests/wine.nix
@@ -43,7 +43,7 @@ let
 in
 listToAttrs (
   map (makeWineTest "winePackages" [ hello32 ]) variants
-  ++ optionals pkgs.stdenv.is64bit
+  ++ optionals pkgs.stdenv.hostPlatform.is64bit
     (map (makeWineTest "wineWowPackages" [ hello32 hello64 ])
          # This wayland combination times out after spending many hours.
          # https://hydra.nixos.org/job/nixos/trunk-combined/nixos.tests.wine.wineWowPackages-wayland.x86_64-linux
diff --git a/pkgs/applications/audio/ario/default.nix b/pkgs/applications/audio/ario/default.nix
index f34ff19ea04c..2231031d0481 100644
--- a/pkgs/applications/audio/ario/default.nix
+++ b/pkgs/applications/audio/ario/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     taglib
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for file in $out/lib/ario/plugins/*.dylib; do
       ln -s $file $out/lib/ario/plugins/$(basename $file .dylib).so
     done
diff --git a/pkgs/applications/audio/ashuffle/default.nix b/pkgs/applications/audio/ashuffle/default.nix
index 8318a4936ed9..45daafa88d79 100644
--- a/pkgs/applications/audio/ashuffle/default.nix
+++ b/pkgs/applications/audio/ashuffle/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   dontUseCmakeConfigure = true;
   nativeBuildInputs = [ cmake pkg-config meson ninja ];
   buildInputs = [ libmpdclient yaml-cpp ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreFoundation ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreFoundation ];
 
   mesonFlags = [ "-Dunsupported_use_system_yamlcpp=true" ];
 
diff --git a/pkgs/applications/audio/aucatctl/default.nix b/pkgs/applications/audio/aucatctl/default.nix
index b5d52dce1856..051a1494fd9f 100644
--- a/pkgs/applications/audio/aucatctl/default.nix
+++ b/pkgs/applications/audio/aucatctl/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   buildInputs = [ sndio ]
-    ++ lib.optional (!stdenv.isDarwin && !stdenv.hostPlatform.isBSD)
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isBSD)
     libbsd;
 
   outputs = [ "out" "man" ];
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
   preBuild = ''
     makeFlagsArray+=("PREFIX=$out")
   '' + lib.optionalString
-    (!stdenv.isDarwin && !stdenv.hostPlatform.isBSD) ''
+    (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isBSD) ''
       makeFlagsArray+=(LDADD="-lsndio -lbsd")
 
       # Fix warning about implicit declaration of function 'strlcpy'
diff --git a/pkgs/applications/audio/audacity/default.nix b/pkgs/applications/audio/audacity/default.nix
index d7f515007d92..85ceb93f48fe 100644
--- a/pkgs/applications/audio/audacity/default.nix
+++ b/pkgs/applications/audio/audacity/default.nix
@@ -75,10 +75,10 @@ stdenv.mkDerivation rec {
     mkdir src/private
     substituteInPlace scripts/build/macOS/fix_bundle.py \
       --replace "path.startswith('/usr/lib/')" "path.startswith('${builtins.storeDir}')"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace libraries/lib-files/FileNames.cpp \
       --replace /usr/include/linux/magic.h ${linuxHeaders}/include/linux/magic.h
-  '' + lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11.0") ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11.0") ''
     sed -z -i "s/NSAppearanceName.*systemAppearance//" src/AudacityApp.mm
   '';
 
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
     python3
     makeWrapper
     wrapGAppsHook3
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     linuxHeaders
   ];
 
@@ -125,7 +125,7 @@ stdenv.mkDerivation rec {
     portaudio
     wavpack
     wxGTK32
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib # for portaudio
     at-spi2-core
     dbus
@@ -138,7 +138,7 @@ stdenv.mkDerivation rec {
     libsepol
     libuuid
     util-linux
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreAudioKit # for portaudio
     libpng
@@ -176,13 +176,13 @@ stdenv.mkDerivation rec {
   # Replace audacity's wrapper, to:
   # - put it in the right place, it shouldn't be in "$out/audacity"
   # - Add the ffmpeg dynamic dependency
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram "$out/bin/audacity" \
       "''${gappsWrapperArgs[@]}" \
       --prefix LD_LIBRARY_PATH : "$out/lib/audacity":${lib.makeLibraryPath [ ffmpeg_7 ]} \
       --suffix AUDACITY_MODULES_PATH : "$out/lib/audacity/modules" \
       --suffix AUDACITY_PATH : "$out/share/audacity"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv $out/Audacity.app $out/Applications/
     makeWrapper $out/Applications/Audacity.app/Contents/MacOS/Audacity $out/bin/audacity
diff --git a/pkgs/applications/audio/cardinal/default.nix b/pkgs/applications/audio/cardinal/default.nix
index 654d22233a3b..9c318e916a45 100644
--- a/pkgs/applications/audio/cardinal/default.nix
+++ b/pkgs/applications/audio/cardinal/default.nix
@@ -89,6 +89,6 @@ stdenv.mkDerivation rec {
     mainProgram = "Cardinal";
     platforms = lib.platforms.all;
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/audio/cd-discid/default.nix b/pkgs/applications/audio/cd-discid/default.nix
index e13a64e4bd83..a30ebc8fbe39 100644
--- a/pkgs/applications/audio/cd-discid/default.nix
+++ b/pkgs/applications/audio/cd-discid/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" "INSTALL=install" ];
 
   buildInputs = []
-    ++ lib.optional stdenv.isDarwin IOKit;
+    ++ lib.optional stdenv.hostPlatform.isDarwin IOKit;
 
   meta = with lib; {
     homepage = "http://linukz.org/cd-discid.shtml";
diff --git a/pkgs/applications/audio/cdparanoia/default.nix b/pkgs/applications/audio/cdparanoia/default.nix
index 4c861a177846..bdeb8eec896d 100644
--- a/pkgs/applications/audio/cdparanoia/default.nix
+++ b/pkgs/applications/audio/cdparanoia/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "1pv4zrajm46za0f6lv162iqffih57a8ly4pc69f7y0gfyigb8p80";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       url = "https://trac.macports.org/export/70964/trunk/dports/audio/cdparanoia/files/osx_interface.patch";
       sha256 = "0hq3lvfr0h1m3p0r33jij0s1aspiqlpy533rwv19zrfllb39qvr8";
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     autoreconfHook
   ];
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
     IOKit
   ];
diff --git a/pkgs/applications/audio/chuck/default.nix b/pkgs/applications/audio/chuck/default.nix
index 6b975b3c6b95..db42e60730ea 100644
--- a/pkgs/applications/audio/chuck/default.nix
+++ b/pkgs/applications/audio/chuck/default.nix
@@ -12,16 +12,16 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ flex bison which ]
-    ++ lib.optionals stdenv.isDarwin [ DarwinTools xcbuild ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools xcbuild ];
 
   buildInputs = [ libsndfile ]
-    ++ lib.optional (!stdenv.isDarwin) alsa-lib
-    ++ lib.optionals stdenv.isDarwin [ AppKit Carbon CoreAudio CoreMIDI CoreServices Kernel MultitouchSupport ];
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) alsa-lib
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit Carbon CoreAudio CoreMIDI CoreServices Kernel MultitouchSupport ];
 
   patches = [ ./darwin-limits.patch ];
 
   makeFlags = [ "-C src" "DESTDIR=$(out)/bin" ];
-  buildFlags = [ (if stdenv.isDarwin then "mac" else "linux-alsa") ];
+  buildFlags = [ (if stdenv.hostPlatform.isDarwin then "mac" else "linux-alsa") ];
 
   meta = with lib; {
     description = "Programming language for real-time sound synthesis and music creation";
diff --git a/pkgs/applications/audio/cmus/default.nix b/pkgs/applications/audio/cmus/default.nix
index db32f8548517..bef7d46a53e4 100644
--- a/pkgs/applications/audio/cmus/default.nix
+++ b/pkgs/applications/audio/cmus/default.nix
@@ -1,15 +1,15 @@
 { config, lib, stdenv, fetchFromGitHub, ncurses, pkg-config
 , libiconv, CoreAudio, AudioUnit, VideoToolbox
 
-, alsaSupport ? stdenv.isLinux, alsa-lib ? null
+, alsaSupport ? stdenv.hostPlatform.isLinux, alsa-lib ? null
 # simple fallback for everyone else
-, aoSupport ? !stdenv.isLinux, libao ? null
+, aoSupport ? !stdenv.hostPlatform.isLinux, libao ? null
 , jackSupport ? false, libjack ? null
 , samplerateSupport ? jackSupport, libsamplerate ? null
 , ossSupport ? false, alsa-oss ? null
 , pulseaudioSupport ? config.pulseaudio or false, libpulseaudio ? null
 , sndioSupport ? false, sndio ? null
-, mprisSupport ? stdenv.isLinux, systemd ? null
+, mprisSupport ? stdenv.hostPlatform.isLinux, systemd ? null
 
 # TODO: add these
 #, artsSupport
@@ -103,7 +103,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv CoreAudio AudioUnit VideoToolbox ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv CoreAudio AudioUnit VideoToolbox ]
     ++ lib.flatten (lib.concatMap (a: a.deps) opts);
 
   prefixKey = "prefix=";
diff --git a/pkgs/applications/audio/cmusfm/default.nix b/pkgs/applications/audio/cmusfm/default.nix
index 5d3a62bd2a56..117356bf948e 100644
--- a/pkgs/applications/audio/cmusfm/default.nix
+++ b/pkgs/applications/audio/cmusfm/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config, curl, libnotify
-, gdk-pixbuf, libnotifySupport ? stdenv.isLinux, debug ? false }:
+, gdk-pixbuf, libnotifySupport ? stdenv.hostPlatform.isLinux, debug ? false }:
 
 stdenv.mkDerivation rec {
   pname = "cmusfm";
diff --git a/pkgs/applications/audio/csound/default.nix b/pkgs/applications/audio/csound/default.nix
index ccaacf189fae..c6359103593f 100644
--- a/pkgs/applications/audio/csound/default.nix
+++ b/pkgs/applications/audio/csound/default.nix
@@ -31,21 +31,21 @@ stdenv.mkDerivation rec {
   };
 
   cmakeFlags = [ "-DBUILD_CSOUND_AC=0" ] # fails to find Score.hpp
-    ++ lib.optional stdenv.isDarwin "-DCS_FRAMEWORK_DEST=${placeholder "out"}/lib"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-DCS_FRAMEWORK_DEST=${placeholder "out"}/lib"
     # Ignore gettext in CMAKE_PREFIX_PATH on cross to prevent find_program picking up the wrong gettext
     ++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) "-DCMAKE_IGNORE_PATH=${lib.getBin gettext}/bin";
 
   nativeBuildInputs = [ cmake flex bison gettext ];
   buildInputs = [ libsndfile libsamplerate boost ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Accelerate AudioUnit CoreAudio CoreMIDI portaudio
-    ] ++ lib.optionals stdenv.isLinux (builtins.filter (optional: optional != null) [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux (builtins.filter (optional: optional != null) [
       alsa-lib libpulseaudio libjack2
       liblo ladspa-sdk fluidsynth eigen
       curl tcltk fltk
     ]);
 
-  postInstall = lib.optional stdenv.isDarwin ''
+  postInstall = lib.optional stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Library/Frameworks
     ln -s $out/lib/CsoundLib64.framework $out/Library/Frameworks
   '';
diff --git a/pkgs/applications/audio/eartag/default.nix b/pkgs/applications/audio/eartag/default.nix
index 11bd27953f12..d3df0295802c 100644
--- a/pkgs/applications/audio/eartag/default.nix
+++ b/pkgs/applications/audio/eartag/default.nix
@@ -50,7 +50,7 @@ python3Packages.buildPythonApplication rec {
     gobject-introspection
     wrapGAppsHook4
     blueprint-compiler
-  ] ++ lib.optional stdenv.isDarwin gtk4; # for gtk4-update-icon-cache
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin gtk4; # for gtk4-update-icon-cache
 
   buildInputs = [
     librsvg
diff --git a/pkgs/applications/audio/easyaudiosync/default.nix b/pkgs/applications/audio/easyaudiosync/default.nix
index 0b910dfb573b..38fe6b15d937 100644
--- a/pkgs/applications/audio/easyaudiosync/default.nix
+++ b/pkgs/applications/audio/easyaudiosync/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     cmake
     pkg-config
     wrapQtAppsHook
-  ] ++ lib.optional stdenv.isLinux copyDesktopItems;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux copyDesktopItems;
 
   buildInputs = [
     qtbase
@@ -48,11 +48,11 @@ stdenv.mkDerivation rec {
   installPhase =
     ''
       runHook preInstall
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       mv "easyaudiosync.app" "Easy Audio Sync.app"
       cp -r "Easy Audio Sync.app" $out/Applications
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       install -Dm755 easyaudiosync $out/bin/easyaudiosync
 
       for RES in 48 64 128 256; do
diff --git a/pkgs/applications/audio/eq10q/default.nix b/pkgs/applications/audio/eq10q/default.nix
index 84c8333d1857..5be159434354 100644
--- a/pkgs/applications/audio/eq10q/default.nix
+++ b/pkgs/applications/audio/eq10q/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "LV2 EQ plugins and more, with 64 bit processing";
     longDescription = ''
       Up to 10-Bands parametric equalizer with mono and stereo versions.
diff --git a/pkgs/applications/audio/espeak-ng/default.nix b/pkgs/applications/audio/espeak-ng/default.nix
index f0aebf4e4a32..7eabadec04c2 100644
--- a/pkgs/applications/audio/espeak-ng/default.nix
+++ b/pkgs/applications/audio/espeak-ng/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   buildInputs = lib.optional mbrolaSupport mbrola
     ++ lib.optional pcaudiolibSupport pcaudiolib
     ++ lib.optional sonicSupport sonic
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreAudio
     AudioToolbox
     AudioUnit
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
 
   # touch ChangeLog to avoid below error on darwin:
   # Makefile.am: error: required file './ChangeLog.md' not found
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     touch ChangeLog
   '' + ''
     ./autogen.sh
@@ -79,7 +79,7 @@ stdenv.mkDerivation rec {
       --replace '../src/espeak-ng --compile' "${lib.getExe buildPackages.espeak-ng} --compile"
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --set-rpath "$(patchelf --print-rpath $out/bin/espeak-ng)" $out/bin/speak-ng
     wrapProgram $out/bin/espeak-ng \
       --set ALSA_PLUGIN_DIR ${alsa-plugins}/lib/alsa-lib
diff --git a/pkgs/applications/audio/fluidsynth/default.nix b/pkgs/applications/audio/fluidsynth/default.nix
index ff81d7689227..d02f87642f3f 100644
--- a/pkgs/applications/audio/fluidsynth/default.nix
+++ b/pkgs/applications/audio/fluidsynth/default.nix
@@ -19,8 +19,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ buildPackages.stdenv.cc pkg-config cmake ];
 
   buildInputs = [ glib libsndfile libjack2 ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib libpulseaudio ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit AudioUnit CoreAudio CoreMIDI CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libpulseaudio ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit AudioUnit CoreAudio CoreMIDI CoreServices ];
 
   cmakeFlags = [
     "-Denable-framework=off"
diff --git a/pkgs/applications/audio/ft2-clone/default.nix b/pkgs/applications/audio/ft2-clone/default.nix
index 072c038e144a..84de0229497d 100644
--- a/pkgs/applications/audio/ft2-clone/default.nix
+++ b/pkgs/applications/audio/ft2-clone/default.nix
@@ -24,8 +24,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ SDL2 ]
-    ++ lib.optional stdenv.isLinux alsa-lib
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
          libiconv
          CoreAudio
          CoreMIDI
diff --git a/pkgs/applications/audio/glicol-cli/default.nix b/pkgs/applications/audio/glicol-cli/default.nix
index b549b6ac4fbe..8279bfc6b30d 100644
--- a/pkgs/applications/audio/glicol-cli/default.nix
+++ b/pkgs/applications/audio/glicol-cli/default.nix
@@ -25,9 +25,9 @@ rustPlatform.buildRustPackage rec {
     rustPlatform.bindgenHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AudioUnit
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
   ];
 
diff --git a/pkgs/applications/audio/gnome-podcasts/default.nix b/pkgs/applications/audio/gnome-podcasts/default.nix
index de7301e5020c..5625f15e3a23 100644
--- a/pkgs/applications/audio/gnome-podcasts/default.nix
+++ b/pkgs/applications/audio/gnome-podcasts/default.nix
@@ -75,6 +75,6 @@ stdenv.mkDerivation rec {
     license = lib.licenses.gpl3Plus;
     maintainers = lib.teams.gnome.members;
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gnome-podcasts.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gnome-podcasts.x86_64-darwin
   };
 }
diff --git a/pkgs/applications/audio/go-musicfox/default.nix b/pkgs/applications/audio/go-musicfox/default.nix
index 243fa8fa1a2a..d0da4ce048b1 100644
--- a/pkgs/applications/audio/go-musicfox/default.nix
+++ b/pkgs/applications/audio/go-musicfox/default.nix
@@ -37,7 +37,7 @@ buildGoModule rec {
 
   buildInputs = [
     flac
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
   ];
 
diff --git a/pkgs/applications/audio/grandorgue/default.nix b/pkgs/applications/audio/grandorgue/default.nix
index 4aa93b5f7090..771bef276221 100644
--- a/pkgs/applications/audio/grandorgue/default.nix
+++ b/pkgs/applications/audio/grandorgue/default.nix
@@ -41,8 +41,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config imagemagick libicns makeWrapper ];
 
   buildInputs = [ fftwFloat zlib wavpack wxGTK32 yaml-cpp ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib udev ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib udev ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ]
     ++ lib.optional jackaudioSupport libjack2;
 
   cmakeFlags = lib.optionals (!jackaudioSupport) [
@@ -52,9 +52,9 @@ stdenv.mkDerivation rec {
     "-DINSTALL_DEPEND=OFF"
   ] ++ lib.optional (!includeDemo) "-DINSTALL_DEMO=OFF";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DTARGET_OS_IPHONE=0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DTARGET_OS_IPHONE=0";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin,lib}
     mv $out/GrandOrgue.app $out/Applications/
     for lib in $out/Applications/GrandOrgue.app/Contents/Frameworks/lib*; do
diff --git a/pkgs/applications/audio/gst123/default.nix b/pkgs/applications/audio/gst123/default.nix
index 65d925342be2..d988983dcae5 100644
--- a/pkgs/applications/audio/gst123/default.nix
+++ b/pkgs/applications/audio/gst123/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
   enableParallelBuilding = true;
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "GStreamer based command line media player";
     homepage = "https://space.twc.de/~stefan/gst123.php";
     license = lib.licenses.lgpl2Plus;
diff --git a/pkgs/applications/audio/hivelytracker/default.nix b/pkgs/applications/audio/hivelytracker/default.nix
index 8ad62eb81a5a..49cd0a78ed75 100644
--- a/pkgs/applications/audio/hivelytracker/default.nix
+++ b/pkgs/applications/audio/hivelytracker/default.nix
@@ -66,6 +66,6 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = platforms.all;
     mainProgram = "hivelytracker";
     maintainers = with maintainers; [ fgaz ];
-    broken = stdenv.isDarwin; # TODO: try to use xcbuild
+    broken = stdenv.hostPlatform.isDarwin; # TODO: try to use xcbuild
   };
 })
diff --git a/pkgs/applications/audio/jamesdsp/default.nix b/pkgs/applications/audio/jamesdsp/default.nix
index 11fb94dc0815..20c40d5d9d9b 100644
--- a/pkgs/applications/audio/jamesdsp/default.nix
+++ b/pkgs/applications/audio/jamesdsp/default.nix
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Audio effect processor for PipeWire clients";
     mainProgram = "jamesdsp";
     homepage = "https://github.com/Audio4Linux/JDSP4Linux";
diff --git a/pkgs/applications/audio/jellycli/default.nix b/pkgs/applications/audio/jellycli/default.nix
index ddaa6721dfb7..15d69211e1ef 100644
--- a/pkgs/applications/audio/jellycli/default.nix
+++ b/pkgs/applications/audio/jellycli/default.nix
@@ -21,7 +21,7 @@ buildGoModule rec {
   buildInputs = [ alsa-lib ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Jellyfin terminal client";
     longDescription = ''
       Terminal music player, works with Jellyfin (>= 10.6) , Emby (>= 4.4), and
diff --git a/pkgs/applications/audio/librespot/default.nix b/pkgs/applications/audio/librespot/default.nix
index 46ece80638f6..c6c274f60da1 100644
--- a/pkgs/applications/audio/librespot/default.nix
+++ b/pkgs/applications/audio/librespot/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , stdenv
 , openssl
-, withALSA ? stdenv.isLinux
+, withALSA ? stdenv.hostPlatform.isLinux
 , alsa-lib
 , alsa-plugins
 , withPortAudio ? false
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-tbDlWP0sUIa0W9HhdYNOvo9cGeqFemclhA7quh7f/Rw=";
 
-  nativeBuildInputs = [ pkg-config makeWrapper ] ++ lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = [ pkg-config makeWrapper ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     rustPlatform.bindgenHook
   ];
 
diff --git a/pkgs/applications/audio/listenbrainz-mpd/default.nix b/pkgs/applications/audio/listenbrainz-mpd/default.nix
index 0c7ea944a8bf..900839081e71 100644
--- a/pkgs/applications/audio/listenbrainz-mpd/default.nix
+++ b/pkgs/applications/audio/listenbrainz-mpd/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config installShellFiles asciidoctor ];
 
-  buildInputs = [ sqlite ] ++ (if stdenv.isDarwin then [
+  buildInputs = [ sqlite ] ++ (if stdenv.hostPlatform.isDarwin then [
     libiconv
     Security
     SystemConfiguration
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
 
   buildFeatures = [
     "shell_completion"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "systemd"
   ];
 
diff --git a/pkgs/applications/audio/littlegptracker/default.nix b/pkgs/applications/audio/littlegptracker/default.nix
index fad1d3f15cac..754bf7865f77 100644
--- a/pkgs/applications/audio/littlegptracker/default.nix
+++ b/pkgs/applications/audio/littlegptracker/default.nix
@@ -20,8 +20,8 @@ stdenv.mkDerivation {
   buildInputs = [
     SDL
   ]
-  ++ lib.optional stdenv.isDarwin Foundation
-  ++ lib.optional stdenv.isLinux jack2;
+  ++ lib.optional stdenv.hostPlatform.isDarwin Foundation
+  ++ lib.optional stdenv.hostPlatform.isLinux jack2;
 
   patches = [
     # Remove outdated (pre-64bit) checks that would fail on modern platforms
@@ -32,15 +32,15 @@ stdenv.mkDerivation {
   preBuild = "cd projects";
 
   makeFlags = [ "CXX=${stdenv.cc.targetPrefix}c++" ]
-    ++ lib.optionals stdenv.isLinux  [ "PLATFORM=DEB" ]
-    ++ lib.optionals stdenv.isDarwin [ "PLATFORM=OSX" ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux  [ "PLATFORM=DEB" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "PLATFORM=OSX" ];
 
   env.NIX_CFLAGS_COMPILE = toString ([ "-fpermissive" ] ++
     lib.optional stdenv.hostPlatform.isAarch64 "-Wno-error=narrowing");
 
-  NIX_LDFLAGS = lib.optional stdenv.isDarwin "-framework Foundation";
+  NIX_LDFLAGS = lib.optional stdenv.hostPlatform.isDarwin "-framework Foundation";
 
-  installPhase = let extension = if stdenv.isDarwin then "app" else "deb-exe";
+  installPhase = let extension = if stdenv.hostPlatform.isDarwin then "app" else "deb-exe";
     in "install -Dm555 lgpt.${extension} $out/bin/lgpt";
 
   passthru.updateScript = unstableGitUpdater {
@@ -69,7 +69,7 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
     # https://github.com/NixOS/nixpkgs/pull/91766#issuecomment-688751821
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "lgpt";
   };
 }
diff --git a/pkgs/applications/audio/master_me/default.nix b/pkgs/applications/audio/master_me/default.nix
index 6ed4a2efef60..4d8a35588e7e 100644
--- a/pkgs/applications/audio/master_me/default.nix
+++ b/pkgs/applications/audio/master_me/default.nix
@@ -23,8 +23,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ libGL python3 ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ]
-    ++ lib.optionals stdenv.isLinux [ libX11 libXext libXrandr ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libX11 libXext libXrandr ];
 
   enableParallelBuilding = true;
 
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     description = "automatic mastering plugin for live streaming, podcasts and internet radio";
     maintainers = with maintainers; [ magnetophon ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # error: no type or protocol named 'NSPasteboardType'
+    broken = stdenv.hostPlatform.isDarwin; # error: no type or protocol named 'NSPasteboardType'
     license = licenses.gpl3Plus;
     mainProgram = "master_me";
   };
diff --git a/pkgs/applications/audio/mellowplayer/default.nix b/pkgs/applications/audio/mellowplayer/default.nix
index 9551e0dda3b2..2bffd43b7b95 100644
--- a/pkgs/applications/audio/mellowplayer/default.nix
+++ b/pkgs/applications/audio/mellowplayer/default.nix
@@ -62,7 +62,7 @@ mkDerivation rec {
 
   meta = with lib; {
     inherit (qtbase.meta) platforms;
-    broken = stdenv.isDarwin; # test build fails, but the project is not maintained anymore
+    broken = stdenv.hostPlatform.isDarwin; # test build fails, but the project is not maintained anymore
 
     description = "Cloud music integration for your desktop";
     mainProgram = "MellowPlayer";
diff --git a/pkgs/applications/audio/midivisualizer/default.nix b/pkgs/applications/audio/midivisualizer/default.nix
index 10a2a5de6a09..54f13d3e628a 100644
--- a/pkgs/applications/audio/midivisualizer/default.nix
+++ b/pkgs/applications/audio/midivisualizer/default.nix
@@ -36,13 +36,13 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     glfw
     ffmpeg-full
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
     libXrandr
     libXinerama
     libXcursor
     gtk3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Carbon
     Cocoa
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
     Kernel
   ];
 
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications $out/bin
     cp -r MIDIVisualizer.app $out/Applications/
     ln -s ../Applications/MIDIVisualizer.app/Contents/MacOS/MIDIVisualizer $out/bin/
diff --git a/pkgs/applications/audio/miniaudicle/default.nix b/pkgs/applications/audio/miniaudicle/default.nix
index f3cd335b47be..25ab4f7c6b71 100644
--- a/pkgs/applications/audio/miniaudicle/default.nix
+++ b/pkgs/applications/audio/miniaudicle/default.nix
@@ -59,6 +59,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # not attempted
+    broken = stdenv.hostPlatform.isDarwin; # not attempted
   };
 })
diff --git a/pkgs/applications/audio/minidsp/default.nix b/pkgs/applications/audio/minidsp/default.nix
index 1ba98f003481..6691d3e9507e 100644
--- a/pkgs/applications/audio/minidsp/default.nix
+++ b/pkgs/applications/audio/minidsp/default.nix
@@ -25,10 +25,10 @@ rustPlatform.buildRustPackage rec {
   cargoBuildFlags = ["-p minidsp -p minidsp-daemon"];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [libusb1]
-    ++ lib.optionals stdenv.isDarwin [AppKit IOKit];
+    lib.optionals stdenv.hostPlatform.isLinux [libusb1]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [AppKit IOKit];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [pkg-config];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [pkg-config];
 
   meta = with lib; {
     description = "Control interface for some MiniDSP products";
diff --git a/pkgs/applications/audio/mixxx/default.nix b/pkgs/applications/audio/mixxx/default.nix
index 8ef52e90f790..90bc03610318 100644
--- a/pkgs/applications/audio/mixxx/default.nix
+++ b/pkgs/applications/audio/mixxx/default.nix
@@ -132,7 +132,7 @@ mkDerivation rec {
     "-DINSTALL_USER_UDEV_RULES=OFF"
   ];
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     rules="$src/res/linux/mixxx-usb-uaccess.rules"
     if [ ! -f "$rules" ]; then
         echo "$rules is missing, must update the Nix file."
diff --git a/pkgs/applications/audio/moc/default.nix b/pkgs/applications/audio/moc/default.nix
index a7ad6590aa6b..6039654d76dc 100644
--- a/pkgs/applications/audio/moc/default.nix
+++ b/pkgs/applications/audio/moc/default.nix
@@ -3,7 +3,7 @@
 , ncurses, db , popt, libtool
 , libiconv, CoreServices
 # Sound sub-systems
-, alsaSupport ? (!stdenv.isDarwin), alsa-lib
+, alsaSupport ? (!stdenv.hostPlatform.isDarwin), alsa-lib
 , pulseSupport ? true, libpulseaudio
 , jackSupport ? true, libjack2
 , ossSupport ? true
@@ -80,7 +80,7 @@ stdenv.mkDerivation {
     # Misc
     ++ lib.optional curlSupport curl
     ++ lib.optional samplerateSupport libsamplerate
-    ++ lib.optionals stdenv.isDarwin [ libiconv CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv CoreServices ];
 
   configureFlags = [
     # Sound sub-systems
diff --git a/pkgs/applications/audio/mopidy/mopidy.nix b/pkgs/applications/audio/mopidy/mopidy.nix
index ef604a6b4150..12eab45c52a2 100644
--- a/pkgs/applications/audio/mopidy/mopidy.nix
+++ b/pkgs/applications/audio/mopidy/mopidy.nix
@@ -33,7 +33,7 @@ pythonPackages.buildPythonApplication rec {
       requests
       setuptools
       tornado
-    ] ++ lib.optional (!stdenv.isDarwin) dbus-python
+    ] ++ lib.optional (!stdenv.hostPlatform.isDarwin) dbus-python
   );
 
   propagatedNativeBuildInputs = [
diff --git a/pkgs/applications/audio/mp3blaster/default.nix b/pkgs/applications/audio/mp3blaster/default.nix
index 1faeddb4d8e0..02711ab4e131 100644
--- a/pkgs/applications/audio/mp3blaster/default.nix
+++ b/pkgs/applications/audio/mp3blaster/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     ncurses
     libvorbis
-  ] ++ lib.optional stdenv.isDarwin SDL;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin SDL;
 
   env.NIX_CFLAGS_COMPILE = toString ([
     "-Wno-narrowing"
diff --git a/pkgs/applications/audio/mpc/default.nix b/pkgs/applications/audio/mpc/default.nix
index b0dcbfa18c59..c58c6831edf4 100644
--- a/pkgs/applications/audio/mpc/default.nix
+++ b/pkgs/applications/audio/mpc/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libmpdclient
   ]
-  ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeBuildInputs = [
     installShellFiles
diff --git a/pkgs/applications/audio/musescore/default.nix b/pkgs/applications/audio/musescore/default.nix
index f7f44b690242..6f28bf98a1b1 100644
--- a/pkgs/applications/audio/musescore/default.nix
+++ b/pkgs/applications/audio/musescore/default.nix
@@ -35,10 +35,10 @@
 }:
 
 let
-  stdenv' = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   # portaudio propagates Darwin frameworks. Rebuild it using the 11.0 stdenv
   # from Qt and the 11.0 SDK frameworks.
-  portaudio' = if stdenv.isDarwin then portaudio.override {
+  portaudio' = if stdenv.hostPlatform.isDarwin then portaudio.override {
     stdenv = stdenv';
     inherit (darwin.apple_sdk_11_0.frameworks)
       AudioUnit
@@ -94,10 +94,10 @@ in stdenv'.mkDerivation (finalAttrs: {
 
   qtWrapperArgs = [
     # MuseScore JACK backend loads libjack at runtime.
-    "--prefix ${lib.optionalString stdenv.isDarwin "DY"}LD_LIBRARY_PATH : ${lib.makeLibraryPath [ libjack2 ]}"
-  ] ++ lib.optionals (stdenv.isLinux) [
+    "--prefix ${lib.optionalString stdenv.hostPlatform.isDarwin "DY"}LD_LIBRARY_PATH : ${lib.makeLibraryPath [ libjack2 ]}"
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [
     "--set ALSA_PLUGIN_DIR ${alsa-plugins}/lib/alsa-lib"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     # There are some issues with using the wayland backend, see:
     # https://musescore.org/en/node/321936
     "--set-default QT_QPA_PLATFORM xcb"
@@ -115,7 +115,7 @@ in stdenv'.mkDerivation (finalAttrs: {
     qttools
     pkg-config
     ninja
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     # Since https://github.com/musescore/MuseScore/pull/13847/commits/685ac998
     # GTK3 is needed for file dialogs. Fixes crash with No GSettings schemas error.
     wrapGAppsHook3
@@ -141,17 +141,17 @@ in stdenv'.mkDerivation (finalAttrs: {
     qtsvg
     qtscxml
     qtnetworkauth
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     qtwayland
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Cocoa
   ];
 
   postInstall = ''
     # Remove unneeded bundled libraries and headers
     rm -r $out/{include,lib}
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p "$out/Applications"
     mv "$out/mscore.app" "$out/Applications/mscore.app"
     mkdir -p $out/bin
@@ -174,8 +174,8 @@ in stdenv'.mkDerivation (finalAttrs: {
   # so we disable it and explicitly use makeQtWrapper.
   #
   # TODO: check if something like this is also needed for macOS.
-  dontWrapQtApps = stdenv.isLinux;
-  postFixup = lib.optionalString stdenv.isLinux ''
+  dontWrapQtApps = stdenv.hostPlatform.isLinux;
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/libexec
     mv $out/bin/mscore $out/libexec
     makeQtWrapper $out/libexec/mscore $out/bin/mscore
diff --git a/pkgs/applications/audio/muso/default.nix b/pkgs/applications/audio/muso/default.nix
index ba235b5157a5..97d897d5fcb3 100644
--- a/pkgs/applications/audio/muso/default.nix
+++ b/pkgs/applications/audio/muso/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ pkg-config wrapGAppsHook3 ];
-  buildInputs = lib.optional stdenv.isDarwin CoreServices;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin CoreServices;
 
   preConfigure = ''
     substituteInPlace lib/utils.rs \
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-+UVUejKCfjC6zdW315wmu7f3A5GmnoQ3rIk8SK6LIRI=";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Automatic music sorter (based on ID3 tags)";
     mainProgram = "muso";
     homepage = "https://github.com/quebin31/muso";
diff --git a/pkgs/applications/audio/ncspot/default.nix b/pkgs/applications/audio/ncspot/default.nix
index 4053a1a88f6b..d2d428963bad 100644
--- a/pkgs/applications/audio/ncspot/default.nix
+++ b/pkgs/applications/audio/ncspot/default.nix
@@ -35,16 +35,16 @@ rustPlatform.buildRustPackage rec {
     ++ lib.optional withClipboard python3;
 
   buildInputs = [ ncurses ]
-    ++ lib.optional stdenv.isLinux openssl
+    ++ lib.optional stdenv.hostPlatform.isLinux openssl
     ++ lib.optional withALSA alsa-lib
     ++ lib.optional withClipboard libxcb
     ++ lib.optional withCover ueberzug
     ++ lib.optional withPulseAudio libpulseaudio
     ++ lib.optional withPortAudio portaudio
     ++ lib.optional (withMPRIS || withNotify) dbus
-    ++ lib.optional stdenv.isDarwin Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DNCURSES_UNCTRL_H_incl";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DNCURSES_UNCTRL_H_incl";
 
   buildNoDefaultFeatures = true;
 
diff --git a/pkgs/applications/audio/open-music-kontrollers/generic.nix b/pkgs/applications/audio/open-music-kontrollers/generic.nix
index 5c48f08dcd7c..4c4211e49f0a 100644
--- a/pkgs/applications/audio/open-music-kontrollers/generic.nix
+++ b/pkgs/applications/audio/open-music-kontrollers/generic.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
   ] ++ additionalBuildInputs;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = description;
     homepage = "https://open-music-kontrollers.ch/lv2/${pname}:";
     license = licenses.artistic2;
diff --git a/pkgs/applications/audio/openutau/default.nix b/pkgs/applications/audio/openutau/default.nix
index d0e840b1516f..df53f4a49644 100644
--- a/pkgs/applications/audio/openutau/default.nix
+++ b/pkgs/applications/audio/openutau/default.nix
@@ -39,7 +39,7 @@ buildDotnetModule rec {
   dotnetInstallFlags = [ "-p:PublishReadyToRun=false" ];
 
   # socket cannot bind to localhost on darwin for tests
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # net7.0 replacement needed until upstream bumps to dotnet 7
   postPatch = ''
@@ -54,9 +54,9 @@ buildDotnetModule rec {
 
   # need to make sure proprietary worldline resampler is copied
   postInstall = let
-    runtime = if (stdenv.isLinux && stdenv.isx86_64) then "linux-x64"
-         else if (stdenv.isLinux && stdenv.isAarch64) then "linux-arm64"
-         else if stdenv.isDarwin then "osx"
+    runtime = if (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64) then "linux-x64"
+         else if (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) then "linux-arm64"
+         else if stdenv.hostPlatform.isDarwin then "osx"
          else null;
   in lib.optionalString (runtime != null) ''
     cp runtimes/${runtime}/native/libworldline${stdenv.hostPlatform.extensions.sharedLibrary} $out/lib/OpenUtau/
diff --git a/pkgs/applications/audio/opustags/default.nix b/pkgs/applications/audio/opustags/default.nix
index 9bafacc2e30e..9f306a3de1b4 100644
--- a/pkgs/applications/audio/opustags/default.nix
+++ b/pkgs/applications/audio/opustags/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
 
   nativeBuildInputs = [ cmake pkg-config ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   buildInputs = [ libogg ];
 
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/fmang/opustags";
     description = "Ogg Opus tags editor";
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ kmein ];
     license = licenses.bsd3;
     mainProgram = "opustags";
diff --git a/pkgs/applications/audio/parrot/default.nix b/pkgs/applications/audio/parrot/default.nix
index a0b2972ca037..d7da9213bce8 100644
--- a/pkgs/applications/audio/parrot/default.nix
+++ b/pkgs/applications/audio/parrot/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage {
   nativeBuildInputs = [ cmake makeBinaryWrapper pkg-config ];
 
   buildInputs = [ libopus openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     wrapProgram $out/bin/parrot \
diff --git a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
index 50455328f3a4..a82007c375bd 100644
--- a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
+++ b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Time domain pitch tracker for Pure Data";
     homepage = "http://www.katjaas.nl/helmholtz/helmholtz.html";
     license = lib.licenses.bsd3;
diff --git a/pkgs/applications/audio/pithos/default.nix b/pkgs/applications/audio/pithos/default.nix
index dbcc99d7de56..a9ea4096859c 100644
--- a/pkgs/applications/audio/pithos/default.nix
+++ b/pkgs/applications/audio/pithos/default.nix
@@ -30,7 +30,7 @@ pythonPackages.buildPythonApplication rec {
     (with pythonPackages; [ pygobject3 pylast ]);
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Pandora Internet Radio player for GNOME";
     mainProgram = "pithos";
     homepage = "https://pithos.github.io/";
diff --git a/pkgs/applications/audio/plugin-torture/default.nix b/pkgs/applications/audio/plugin-torture/default.nix
index b3f671adc4b2..4b5f0c4acd2f 100644
--- a/pkgs/applications/audio/plugin-torture/default.nix
+++ b/pkgs/applications/audio/plugin-torture/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://github.com/cth103/plugin-torture";
     description = "Tool to test LADSPA and LV2 plugins";
     license = licenses.gpl2;
diff --git a/pkgs/applications/audio/polyphone/default.nix b/pkgs/applications/audio/polyphone/default.nix
index 11feb31ff1c9..2a38222949f6 100644
--- a/pkgs/applications/audio/polyphone/default.nix
+++ b/pkgs/applications/audio/polyphone/default.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Soundfont editor for creating musical instruments";
     mainProgram = "polyphone";
     homepage = "https://www.polyphone-soundfonts.com/";
diff --git a/pkgs/applications/audio/pt2-clone/default.nix b/pkgs/applications/audio/pt2-clone/default.nix
index d00a0e841ba6..0cbb64e6dcad 100644
--- a/pkgs/applications/audio/pt2-clone/default.nix
+++ b/pkgs/applications/audio/pt2-clone/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ SDL2 ] ++ lib.optional stdenv.isLinux alsa-lib;
+  buildInputs = [ SDL2 ] ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib;
 
   postInstall = ''
     install -Dm444 "$src/release/other/Freedesktop.org Resources/ProTracker 2 clone.desktop" \
diff --git a/pkgs/applications/audio/puredata/default.nix b/pkgs/applications/audio/puredata/default.nix
index a335dabf4abc..5d1b11c4ef29 100644
--- a/pkgs/applications/audio/puredata/default.nix
+++ b/pkgs/applications/audio/puredata/default.nix
@@ -25,9 +25,9 @@ stdenv.mkDerivation rec {
   buildInputs = [
     fftw
     libjack2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     portaudio
   ];
 
@@ -35,9 +35,9 @@ stdenv.mkDerivation rec {
     "--enable-universal"
     "--enable-fftw"
     "--enable-jack"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--enable-alsa"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--enable-portaudio"
     "--without-local-portaudio"
     "--disable-jack-framework"
diff --git a/pkgs/applications/audio/quadrafuzz/default.nix b/pkgs/applications/audio/quadrafuzz/default.nix
index 4f0ea946832e..e2156b391007 100644
--- a/pkgs/applications/audio/quadrafuzz/default.nix
+++ b/pkgs/applications/audio/quadrafuzz/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://github.com/jpcima/quadrafuzz";
     description = "Multi-band fuzz distortion plugin";
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/radiotray-ng/default.nix b/pkgs/applications/audio/radiotray-ng/default.nix
index ee994b56efb0..6577f33baba0 100644
--- a/pkgs/applications/audio/radiotray-ng/default.nix
+++ b/pkgs/applications/audio/radiotray-ng/default.nix
@@ -94,7 +94,7 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE = "-Wno-error=deprecated-declarations";
 
   nativeCheckInputs = [ gtest ];
-  doCheck = !stdenv.isAarch64; # single failure that I can't explain
+  doCheck = !stdenv.hostPlatform.isAarch64; # single failure that I can't explain
 
   preFixup = ''
     gappsWrapperArgs+=(--suffix PATH : ${lib.makeBinPath [ dbus ]})
diff --git a/pkgs/applications/audio/reaper/default.nix b/pkgs/applications/audio/reaper/default.nix
index da26c1570567..ff8d32b90780 100644
--- a/pkgs/applications/audio/reaper/default.nix
+++ b/pkgs/applications/audio/reaper/default.nix
@@ -15,14 +15,14 @@
 , xdotool
 , which
 
-, jackSupport ? stdenv.isLinux
+, jackSupport ? stdenv.hostPlatform.isLinux
 , jackLibrary
-, pulseaudioSupport ? config.pulseaudio or stdenv.isLinux
+, pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux
 , libpulseaudio
 }:
 
 let
-  url_for_platform = version: arch: if stdenv.isDarwin
+  url_for_platform = version: arch: if stdenv.hostPlatform.isDarwin
     then "https://www.reaper.fm/files/${lib.versions.major version}.x/reaper${builtins.replaceStrings ["."] [""] version}_universal.dmg"
     else "https://www.reaper.fm/files/${lib.versions.major version}.x/reaper${builtins.replaceStrings ["."] [""] version}_linux_${arch}.tar.xz";
 in
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = url_for_platform version stdenv.hostPlatform.qemuArch;
-    hash = if stdenv.isDarwin then "sha256-dIRZCUIfqnGTxBaLzczwzD6hA/PyAxPqfa+FfCRKdu0=" else {
+    hash = if stdenv.hostPlatform.isDarwin then "sha256-dIRZCUIfqnGTxBaLzczwzD6hA/PyAxPqfa+FfCRKdu0=" else {
       x86_64-linux = "sha256-aa2KcL8yZYG+Dki7J6U473E2BQgdACAIzRLtD9zuHV0=";
       aarch64-linux = "sha256-NECEEUKtTQajl0MZK8/NsbhcuyihHOo0Q5Y5UpAAgrM=";
     }.${stdenv.hostPlatform.system};
@@ -40,24 +40,24 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     which
     autoPatchelfHook
     xdg-utils # Required for desktop integration
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     undmg
   ];
 
-  sourceRoot = lib.optionalString stdenv.isDarwin "Reaper.app";
+  sourceRoot = lib.optionalString stdenv.hostPlatform.isDarwin "Reaper.app";
 
   buildInputs = [
     stdenv.cc.cc.lib # reaper and libSwell need libstdc++.so.6
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     gtk3
     alsa-lib
   ];
 
-  runtimeDependencies = lib.optionals stdenv.isLinux [
+  runtimeDependencies = lib.optionals stdenv.hostPlatform.isLinux [
     gtk3 # libSwell needs libgdk-3.so.0
   ]
   ++ lib.optional jackSupport jackLibrary
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
 
   dontBuild = true;
 
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     runHook preInstall
     mkdir -p "$out/Applications/Reaper.app"
     cp -r * "$out/Applications/Reaper.app/"
diff --git a/pkgs/applications/audio/rkrlv2/default.nix b/pkgs/applications/audio/rkrlv2/default.nix
index 19fca6af988d..fa62fcfa47ac 100644
--- a/pkgs/applications/audio/rkrlv2/default.nix
+++ b/pkgs/applications/audio/rkrlv2/default.nix
@@ -21,6 +21,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Only;
     maintainers = [ maintainers.joelmo ];
     platforms = platforms.unix;
-    broken = stdenv.isAarch64; # g++: error: unrecognized command line option '-mfpmath=sse'
+    broken = stdenv.hostPlatform.isAarch64; # g++: error: unrecognized command line option '-mfpmath=sse'
   };
 }
diff --git a/pkgs/applications/audio/schismtracker/default.nix b/pkgs/applications/audio/schismtracker/default.nix
index bc6a406ba2f5..6147973f1493 100644
--- a/pkgs/applications/audio/schismtracker/default.nix
+++ b/pkgs/applications/audio/schismtracker/default.nix
@@ -21,18 +21,18 @@ stdenv.mkDerivation rec {
   };
 
   configureFlags = [ "--enable-dependency-tracking" ]
-    ++ lib.optional stdenv.isDarwin "--disable-sdltest";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-sdltest";
 
   nativeBuildInputs = [ autoreconfHook python3 ];
 
   buildInputs = [ SDL2 ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib libXext ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libXext ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   enableParallelBuilding = true;
 
   # Our Darwin SDL2 doesn't have a SDL2main to link against
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure.ac \
       --replace '-lSDL2main' '-lSDL2'
   '';
diff --git a/pkgs/applications/audio/scream/default.nix b/pkgs/applications/audio/scream/default.nix
index 3c0b83d46c19..cc09b2187535 100644
--- a/pkgs/applications/audio/scream/default.nix
+++ b/pkgs/applications/audio/scream/default.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, config, fetchFromGitHub, cmake, pkg-config
-, alsaSupport ? stdenv.isLinux, alsa-lib
-, pulseSupport ? config.pulseaudio or stdenv.isLinux, libpulseaudio
+, alsaSupport ? stdenv.hostPlatform.isLinux, alsa-lib
+, pulseSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux, libpulseaudio
 , jackSupport ? false, libjack2, soxr
 , pcapSupport ? false, libpcap
 }:
diff --git a/pkgs/applications/audio/sfxr/default.nix b/pkgs/applications/audio/sfxr/default.nix
index d3314facb692..03813ff35248 100644
--- a/pkgs/applications/audio/sfxr/default.nix
+++ b/pkgs/applications/audio/sfxr/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
   makeFlags = [ "DESTDIR=$(out)" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "http://www.drpetter.se/project_sfxr.html";
     description = "Videogame sound effect generator";
     mainProgram = "sfxr";
diff --git a/pkgs/applications/audio/snapcast/default.nix b/pkgs/applications/audio/snapcast/default.nix
index ff58b64cee64..821cda32e977 100644
--- a/pkgs/applications/audio/snapcast/default.nix
+++ b/pkgs/applications/audio/snapcast/default.nix
@@ -24,10 +24,10 @@ stdenv.mkDerivation rec {
     asio avahi flac libogg libvorbis libopus
     aixlog popl soxr
   ] ++ lib.optional pulseaudioSupport libpulseaudio
-  ++ lib.optional stdenv.isLinux alsa-lib
-  ++ lib.optionals stdenv.isDarwin [ IOKit AudioToolbox ];
+  ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit AudioToolbox ];
 
-  TARGET=lib.optionalString stdenv.isDarwin "MACOS";
+  TARGET=lib.optionalString stdenv.hostPlatform.isDarwin "MACOS";
 
   # Upstream systemd unit files are pretty awful, so we provide our own in a
   # NixOS module. It might make sense to get that upstreamed...
diff --git a/pkgs/applications/audio/snd/default.nix b/pkgs/applications/audio/snd/default.nix
index ad935b09ed16..8bb0bf1387e2 100644
--- a/pkgs/applications/audio/snd/default.nix
+++ b/pkgs/applications/audio/snd/default.nix
@@ -15,8 +15,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ fftw gsl motif ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices CoreMIDI ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices CoreMIDI ]
     ++ (with xorg; [ libXext libXft libXpm libXt ]);
 
   configureFlags = [ "--with-motif" ];
diff --git a/pkgs/applications/audio/sonobus/default.nix b/pkgs/applications/audio/sonobus/default.nix
index fc0c5977360f..d8a69ecd9a0b 100644
--- a/pkgs/applications/audio/sonobus/default.nix
+++ b/pkgs/applications/audio/sonobus/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation (finalAttrs: {
   env.NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isLinux "-rpath ${lib.makeLibraryPath (finalAttrs.runtimeDependencies)}";
   dontPatchELF = true; # needed or nix will try to optimize the binary by removing "useless" rpath
 
-  postPatch = lib.optionalString (stdenv.isLinux) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isLinux) ''
     # needs special setup on Linux, dunno if it can work on Darwin
     # Also, I get issues with linking without that, not sure why
     sed -i -e '/juce::juce_recommended_lto_flags/d' CMakeLists.txt
@@ -67,7 +67,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   # The program does not provide any CMake install instructions
-  installPhase = lib.optionalString (stdenv.isLinux) ''
+  installPhase = lib.optionalString (stdenv.hostPlatform.isLinux) ''
     runHook preInstall
     cd ../linux
     ./install.sh "$out"
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = with licenses; [ gpl3Plus ];
     maintainers = with maintainers; [ PowerUser64 ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "sonobus";
   };
 })
diff --git a/pkgs/applications/audio/sorcer/default.nix b/pkgs/applications/audio/sorcer/default.nix
index 6c28d540458f..bcca16089a27 100644
--- a/pkgs/applications/audio/sorcer/default.nix
+++ b/pkgs/applications/audio/sorcer/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "http://openavproductions.com/sorcer/";
     description = "Wavetable LV2 plugin synth, targeted at the electronic / dubstep genre";
     license = licenses.gpl3Plus;
diff --git a/pkgs/applications/audio/soundtracker/default.nix b/pkgs/applications/audio/soundtracker/default.nix
index 02c4813e0370..36f90e67a639 100644
--- a/pkgs/applications/audio/soundtracker/default.nix
+++ b/pkgs/applications/audio/soundtracker/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation (finalAttrs: {
     goocanvas
     libxml2
     libsndfile
-  ] ++ lib.optional stdenv.isLinux alsa-lib;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib;
 
   meta = with lib; {
     description = "Music tracking tool similar in design to the DOS program FastTracker and the Amiga legend ProTracker";
diff --git a/pkgs/applications/audio/speech-denoiser/default.nix b/pkgs/applications/audio/speech-denoiser/default.nix
index 415bf352cae9..a0c3d2d25706 100644
--- a/pkgs/applications/audio/speech-denoiser/default.nix
+++ b/pkgs/applications/audio/speech-denoiser/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation  {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Speech denoise lv2 plugin based on RNNoise library";
     homepage = "https://github.com/lucianodato/speech-denoiser";
     license = licenses.lgpl3;
diff --git a/pkgs/applications/audio/spotify-player/default.nix b/pkgs/applications/audio/spotify-player/default.nix
index dcce24d173ce..a3c51cfaaba2 100644
--- a/pkgs/applications/audio/spotify-player/default.nix
+++ b/pkgs/applications/audio/spotify-player/default.nix
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
     cmake
     rustPlatform.bindgenHook
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     makeBinaryWrapper
   ];
 
@@ -61,14 +61,14 @@ rustPlatform.buildRustPackage rec {
     ++ lib.optionals withSixel [ libsixel ]
     ++ lib.optionals (withAudioBackend == "alsa") [ alsa-lib ]
     ++ lib.optionals (withAudioBackend == "pulseaudio") [ libpulseaudio ]
-    ++ lib.optionals (withAudioBackend == "rodio" && stdenv.isLinux) [ alsa-lib ]
+    ++ lib.optionals (withAudioBackend == "rodio" && stdenv.hostPlatform.isLinux) [ alsa-lib ]
     ++ lib.optionals (withAudioBackend == "portaudio") [ portaudio ]
     ++ lib.optionals (withAudioBackend == "jackaudio") [ libjack2 ]
     ++ lib.optionals (withAudioBackend == "rodiojack") [ alsa-lib libjack2 ]
     ++ lib.optionals (withAudioBackend == "sdl") [ SDL2 ]
     ++ lib.optionals (withAudioBackend == "gstreamer") [ gst_all_1.gstreamer gst_all_1.gst-devtools gst_all_1.gst-plugins-base gst_all_1.gst-plugins-good ]
-    ++ lib.optionals (stdenv.isDarwin && withMediaControl) [ darwin.apple_sdk.frameworks.MediaPlayer ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && withMediaControl) [ darwin.apple_sdk.frameworks.MediaPlayer ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       AppKit
       AudioUnit
       Cocoa
@@ -88,7 +88,7 @@ rustPlatform.buildRustPackage rec {
     ++ lib.optionals withFuzzy [ "fzf" ];
 
   # sixel-sys is dynamically linked to libsixel
-  postInstall = lib.optionals (stdenv.isDarwin && withSixel) ''
+  postInstall = lib.optionals (stdenv.hostPlatform.isDarwin && withSixel) ''
     wrapProgram $out/bin/spotify_player \
       --prefix DYLD_LIBRARY_PATH : "${lib.makeLibraryPath [libsixel]}"
   '';
diff --git a/pkgs/applications/audio/spotify-qt/default.nix b/pkgs/applications/audio/spotify-qt/default.nix
index 0fbf7c943842..cbe252bc2b94 100644
--- a/pkgs/applications/audio/spotify-qt/default.nix
+++ b/pkgs/applications/audio/spotify-qt/default.nix
@@ -27,7 +27,7 @@ mkDerivation rec {
 
    installFlags = [ "DESTDIR=$(out)" ];
 
-   postInstall = lib.optionalString stdenvNoCC.isDarwin ''
+   postInstall = lib.optionalString stdenvNoCC.hostPlatform.isDarwin ''
      mkdir -p $out/Applications
      mv $out/bin/spotify-qt.app $out/Applications
      ln $out/Applications/spotify-qt.app/Contents/MacOS/spotify-qt $out/bin/spotify-qt
diff --git a/pkgs/applications/audio/spotify/darwin.nix b/pkgs/applications/audio/spotify/darwin.nix
index 8304bdf3a15d..bc643d4f1b6e 100644
--- a/pkgs/applications/audio/spotify/darwin.nix
+++ b/pkgs/applications/audio/spotify/darwin.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
 
   version = "1.2.40.599.g606b7f29";
 
-  src = if stdenv.isAarch64 then (
+  src = if stdenv.hostPlatform.isAarch64 then (
     fetchurl {
       url = "https://web.archive.org/web/20240622065234/https://download.scdn.co/SpotifyARM64.dmg";
       hash = "sha256-mmjxKYmsX0rFlIU19JOfPbNgOhlcZs5slLUhDhlON1c=";
diff --git a/pkgs/applications/audio/spotify/default.nix b/pkgs/applications/audio/spotify/default.nix
index df6d762c65ef..fe49e680908f 100644
--- a/pkgs/applications/audio/spotify/default.nix
+++ b/pkgs/applications/audio/spotify/default.nix
@@ -18,6 +18,6 @@ let
     mainProgram = "spotify";
   };
 
-in if stdenv.isDarwin
+in if stdenv.hostPlatform.isDarwin
 then callPackage ./darwin.nix (extraArgs // { inherit pname meta; })
 else callPackage ./linux.nix (extraArgs // { inherit pname meta; })
diff --git a/pkgs/applications/audio/stone-phaser/default.nix b/pkgs/applications/audio/stone-phaser/default.nix
index 6bef356172cd..f581ae1b1cb6 100644
--- a/pkgs/applications/audio/stone-phaser/default.nix
+++ b/pkgs/applications/audio/stone-phaser/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://github.com/jpcima/stone-phaser";
     description = "Classic analog phaser effect, made with DPF and Faust";
     maintainers = [ maintainers.magnetophon ];
diff --git a/pkgs/applications/audio/strawberry/default.nix b/pkgs/applications/audio/strawberry/default.nix
index 9179ecccef07..7fedaf3c2fd8 100644
--- a/pkgs/applications/audio/strawberry/default.nix
+++ b/pkgs/applications/audio/strawberry/default.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation rec {
     taglib
     qtbase
     qtx11extras
-  ] ++ optionals stdenv.isLinux [
+  ] ++ optionals stdenv.hostPlatform.isLinux [
     libgpod
     libpulseaudio
     libselinux
@@ -101,7 +101,7 @@ stdenv.mkDerivation rec {
     pkg-config
     qttools
     wrapQtAppsHook
-  ] ++ optionals stdenv.isLinux [
+  ] ++ optionals stdenv.hostPlatform.isLinux [
     util-linux
   ];
 
diff --git a/pkgs/applications/audio/tauon/default.nix b/pkgs/applications/audio/tauon/default.nix
index 12a62f1afc18..3ed875b668ba 100644
--- a/pkgs/applications/audio/tauon/default.nix
+++ b/pkgs/applications/audio/tauon/default.nix
@@ -112,7 +112,7 @@ stdenv.mkDerivation (finalAttrs: {
       setproctitle
     ]
     ++ lib.optional withDiscordRPC pypresence
-    ++ lib.optional stdenv.isLinux pulsectl;
+    ++ lib.optional stdenv.hostPlatform.isLinux pulsectl;
 
   makeWrapperArgs = [
     "--prefix PATH : ${lib.makeBinPath [ ffmpeg ]}"
diff --git a/pkgs/applications/audio/tenacity/default.nix b/pkgs/applications/audio/tenacity/default.nix
index 160a032fd648..0ef4ed73787b 100644
--- a/pkgs/applications/audio/tenacity/default.nix
+++ b/pkgs/applications/audio/tenacity/default.nix
@@ -97,7 +97,7 @@ stdenv.mkDerivation rec {
     makeWrapper
     pkg-config
     python3
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     linuxHeaders
   ];
 
@@ -129,7 +129,7 @@ stdenv.mkDerivation rec {
     twolame
     wxGTK32
     gtk3
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     at-spi2-core
     dbus
     libepoxy
diff --git a/pkgs/applications/audio/termusic/default.nix b/pkgs/applications/audio/termusic/default.nix
index c6048ed1e7fe..c4a42aa3837c 100644
--- a/pkgs/applications/audio/termusic/default.nix
+++ b/pkgs/applications/audio/termusic/default.nix
@@ -74,7 +74,7 @@ rustPlatform.buildRustPackage rec {
     mpv-unwrapped
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreAudio
     CoreGraphics
@@ -82,7 +82,7 @@ rustPlatform.buildRustPackage rec {
     IOKit
     MediaPlayer
     Security
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
   ];
 
diff --git a/pkgs/applications/audio/virtual-ans/default.nix b/pkgs/applications/audio/virtual-ans/default.nix
index 4bec1952e03e..22e18502866a 100644
--- a/pkgs/applications/audio/virtual-ans/default.nix
+++ b/pkgs/applications/audio/virtual-ans/default.nix
@@ -43,13 +43,13 @@ stdenv.mkDerivation rec {
     ln -s $out/${startScript} $out/bin/virtual-ans
   '';
 
-  startScript = if stdenv.isx86_32 then "START_LINUX_X86"
-    else        if stdenv.isx86_64 then "START_LINUX_X86_64"
-    #else        if stdenv.isDarwin then "START_MACOS.app" # disabled because I cannot test on Darwin
+  startScript = if stdenv.hostPlatform.isx86_32 then "START_LINUX_X86"
+    else        if stdenv.hostPlatform.isx86_64 then "START_LINUX_X86_64"
+    #else        if stdenv.hostPlatform.isDarwin then "START_MACOS.app" # disabled because I cannot test on Darwin
     else abort "Unsupported platform: ${stdenv.hostPlatform.linuxArch}.";
 
-  linuxExecutable = if stdenv.isx86_32 then "pixilang_linux_x86"
-    else            if stdenv.isx86_64 then "pixilang_linux_x86_64"
+  linuxExecutable = if stdenv.hostPlatform.isx86_32 then "pixilang_linux_x86"
+    else            if stdenv.hostPlatform.isx86_64 then "pixilang_linux_x86_64"
     else                                    "";
 
   meta = with lib; {
diff --git a/pkgs/applications/audio/vorbis-tools/default.nix b/pkgs/applications/audio/vorbis-tools/default.nix
index 877f670d6861..4325d934e84b 100644
--- a/pkgs/applications/audio/vorbis-tools/default.nix
+++ b/pkgs/applications/audio/vorbis-tools/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ libogg libvorbis libao curl speex flac ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   meta = with lib; {
     description = "Extra tools for Ogg-Vorbis audio codec";
diff --git a/pkgs/applications/audio/wavegain/default.nix b/pkgs/applications/audio/wavegain/default.nix
index 93dd7bf6fb23..49c66b07a91c 100644
--- a/pkgs/applications/audio/wavegain/default.nix
+++ b/pkgs/applications/audio/wavegain/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "ReplayGain for wave files";
     homepage = "https://github.com/MestreLion/wavegain";
     license = lib.licenses.lgpl21;
diff --git a/pkgs/applications/audio/x42-avldrums/default.nix b/pkgs/applications/audio/x42-avldrums/default.nix
index 3234a719e3c0..4a802a324e8a 100644
--- a/pkgs/applications/audio/x42-avldrums/default.nix
+++ b/pkgs/applications/audio/x42-avldrums/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Drum sample player LV2 plugin dedicated to Glen MacArthur's AVLdrums";
     homepage = "https://x42-plugins.com/x42/x42-avldrums";
     maintainers = with maintainers; [ magnetophon orivej ];
diff --git a/pkgs/applications/audio/x42-gmsynth/default.nix b/pkgs/applications/audio/x42-gmsynth/default.nix
index 8f83263d0a00..1d31211ec80d 100644
--- a/pkgs/applications/audio/x42-gmsynth/default.nix
+++ b/pkgs/applications/audio/x42-gmsynth/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Chris Colins' General User soundfont player LV2 plugin";
     homepage = "https://x42-plugins.com/x42/x42-gmsynth";
     maintainers = with maintainers; [ orivej ];
diff --git a/pkgs/applications/audio/xmp/default.nix b/pkgs/applications/audio/xmp/default.nix
index efd5fb9caa60..8abce73aff1f 100644
--- a/pkgs/applications/audio/xmp/default.nix
+++ b/pkgs/applications/audio/xmp/default.nix
@@ -13,8 +13,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ libxmp ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals stdenv.isDarwin [ AudioUnit CoreAudio ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioUnit CoreAudio ];
 
   meta = with lib; {
     description = "Extended module player";
diff --git a/pkgs/applications/audio/youtube-music/default.nix b/pkgs/applications/audio/youtube-music/default.nix
index 59d33a00511b..046203416a03 100644
--- a/pkgs/applications/audio/youtube-music/default.nix
+++ b/pkgs/applications/audio/youtube-music/default.nix
@@ -27,30 +27,30 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ makeWrapper python3 nodejs pnpm.configHook ]
-    ++ lib.optionals (!stdenv.isDarwin) [ copyDesktopItems ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ copyDesktopItems ];
 
 
   ELECTRON_SKIP_BINARY_DOWNLOAD = 1;
 
-  postBuild = lib.optionalString stdenv.isDarwin ''
+  postBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp -R ${electron.dist}/Electron.app Electron.app
     chmod -R u+w Electron.app
   '' + ''
     pnpm build
     ./node_modules/.bin/electron-builder \
       --dir \
-      -c.electronDist=${if stdenv.isDarwin then "." else electron.dist} \
+      -c.electronDist=${if stdenv.hostPlatform.isDarwin then "." else electron.dist} \
       -c.electronVersion=${electron.version}
   '';
 
   installPhase = ''
     runHook preInstall
 
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv pack/mac*/YouTube\ Music.app $out/Applications
     makeWrapper $out/Applications/YouTube\ Music.app/Contents/MacOS/YouTube\ Music $out/bin/youtube-music
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir -p "$out/share/lib/youtube-music"
     cp -r pack/*-unpacked/{locales,resources{,.pak}} "$out/share/lib/youtube-music"
 
@@ -64,7 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
-  postFixup = lib.optionalString (!stdenv.isDarwin) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     makeWrapper ${electron}/bin/electron $out/bin/youtube-music \
       --add-flags $out/share/lib/youtube-music/resources/app.asar \
       --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}" \
diff --git a/pkgs/applications/audio/zrythm/default.nix b/pkgs/applications/audio/zrythm/default.nix
index e99ef4225cc8..28315b0a3701 100644
--- a/pkgs/applications/audio/zrythm/default.nix
+++ b/pkgs/applications/audio/zrythm/default.nix
@@ -206,7 +206,7 @@ stdenv.mkDerivation (finalAttrs: {
     description = "Automated and intuitive digital audio workstation";
     maintainers = with maintainers; [ tshaynik magnetophon yuu astavie PowerUser64 ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     license = licenses.agpl3Plus;
   };
 })
diff --git a/pkgs/applications/audio/zynaddsubfx/default.nix b/pkgs/applications/audio/zynaddsubfx/default.nix
index 6f5512d4fa33..59f0310263a4 100644
--- a/pkgs/applications/audio/zynaddsubfx/default.nix
+++ b/pkgs/applications/audio/zynaddsubfx/default.nix
@@ -16,7 +16,7 @@
 , zlib
 
   # Optional dependencies
-, alsaSupport ? stdenv.isLinux
+, alsaSupport ? stdenv.hostPlatform.isLinux
 , alsa-lib
 , dssiSupport ? false
 , dssi
@@ -28,7 +28,7 @@
 , ossSupport ? true
 , portaudioSupport ? true
 , portaudio
-, sndioSupport ? stdenv.isOpenBSD
+, sndioSupport ? stdenv.hostPlatform.isOpenBSD
 , sndio
 
   # Optional GUI dependencies
@@ -122,7 +122,7 @@ in stdenv.mkDerivation rec {
       lib.optionals lashSupport [ "PortChecker" ]
 
       # Tests fail on aarch64
-      ++ lib.optionals stdenv.isAarch64 [ "MessageTest" "UnisonTest" ];
+      ++ lib.optionals stdenv.hostPlatform.isAarch64 [ "MessageTest" "UnisonTest" ];
   in ''
     runHook preCheck
     ctest --output-on-failure -E '^${lib.concatStringsSep "|" disabledTests}$'
@@ -168,6 +168,6 @@ in stdenv.mkDerivation rec {
     # - ZynAddSubFX LV2 & VST plugin fail to compile (not setup to use ObjC version of pugl)
     # - TTL generation crashes (`pointer being freed was not allocated`) for all VST plugins using AbstractFX
     # - Zest UI fails to start on pulg_setup: Could not open display, aborting.
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/backup/vorta/default.nix b/pkgs/applications/backup/vorta/default.nix
index b620459f3c73..8bc6e719718a 100644
--- a/pkgs/applications/backup/vorta/default.nix
+++ b/pkgs/applications/backup/vorta/default.nix
@@ -26,7 +26,7 @@ python3Packages.buildPythonApplication rec {
     wrapQtAppsHook
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
diff --git a/pkgs/applications/blockchains/alfis/default.nix b/pkgs/applications/blockchains/alfis/default.nix
index 776aa155a2fe..ad40bbef75c9 100644
--- a/pkgs/applications/blockchains/alfis/default.nix
+++ b/pkgs/applications/blockchains/alfis/default.nix
@@ -38,9 +38,9 @@ rustPlatform.buildRustPackage rec {
     makeWrapper
   ];
   buildInputs =
-    lib.optional stdenv.isDarwin Security
-    ++ lib.optional (withGui && stdenv.isLinux) webkitgtk
-    ++ lib.optionals (withGui && stdenv.isDarwin) [
+    lib.optional stdenv.hostPlatform.isDarwin Security
+    ++ lib.optional (withGui && stdenv.hostPlatform.isLinux) webkitgtk
+    ++ lib.optionals (withGui && stdenv.hostPlatform.isDarwin) [
       Cocoa
       WebKit
     ];
@@ -54,7 +54,7 @@ rustPlatform.buildRustPackage rec {
     "--skip=dns::client::tests::test_udp_client"
   ];
 
-  postInstall = lib.optionalString (withGui && stdenv.isLinux) ''
+  postInstall = lib.optionalString (withGui && stdenv.hostPlatform.isLinux) ''
     wrapProgram $out/bin/alfis \
       --prefix PATH : ${lib.makeBinPath [ zenity ]}
   '';
@@ -66,6 +66,6 @@ rustPlatform.buildRustPackage rec {
     maintainers = with lib.maintainers; [ misuzu ];
     platforms = lib.platforms.unix;
     mainProgram = "alfis";
-    broken = withGui && stdenv.isDarwin;
+    broken = withGui && stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/blockchains/besu/default.nix b/pkgs/applications/blockchains/besu/default.nix
index ef985a2806b7..3c48f930a625 100644
--- a/pkgs/applications/blockchains/besu/default.nix
+++ b/pkgs/applications/blockchains/besu/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation (finalAttrs: rec {
     sha256 = "sha256-CC24z0+2dSeqDddX5dJUs7SX9QJ8Iyh/nAp0pqdDvwg=";
   };
 
-  buildInputs = lib.optionals stdenv.isLinux [ jemalloc ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ jemalloc ];
   nativeBuildInputs = [ makeWrapper ];
 
   installPhase = ''
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: rec {
     cp -r lib $out/
     wrapProgram $out/bin/${pname} \
       --set JAVA_HOME "${jre}" \
-      --suffix ${if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH"} : ${lib.makeLibraryPath buildInputs}
+      --suffix ${if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH"} : ${lib.makeLibraryPath buildInputs}
   '';
 
   passthru.tests = {
diff --git a/pkgs/applications/blockchains/bitcoin-abc/default.nix b/pkgs/applications/blockchains/bitcoin-abc/default.nix
index 8ead5982b855..75c782a7f45e 100644
--- a/pkgs/applications/blockchains/bitcoin-abc/default.nix
+++ b/pkgs/applications/blockchains/bitcoin-abc/default.nix
@@ -81,7 +81,7 @@ mkDerivation rec {
     homepage = "https://bitcoinabc.org/";
     maintainers = with maintainers; [ lassulus ];
     license = licenses.mit;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     platforms = platforms.unix;
     mainProgram = "bitcoin-cli";
   };
diff --git a/pkgs/applications/blockchains/bitcoin-knots/default.nix b/pkgs/applications/blockchains/bitcoin-knots/default.nix
index c6838e0a0f65..5c41ba65a695 100644
--- a/pkgs/applications/blockchains/bitcoin-knots/default.nix
+++ b/pkgs/applications/blockchains/bitcoin-knots/default.nix
@@ -42,14 +42,14 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs =
     [ autoreconfHook pkg-config ]
-    ++ lib.optionals stdenv.isLinux [ util-linux ]
-    ++ lib.optionals stdenv.isDarwin [ hexdump ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linux ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ hexdump ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ]
     ++ lib.optionals withGui [ wrapQtAppsHook ];
 
   buildInputs = [ boost libevent miniupnpc zeromq zlib ]
     ++ lib.optionals withWallet [ sqlite ]
-    ++ lib.optionals (withWallet && !stdenv.isDarwin) [ db48 ]
+    ++ lib.optionals (withWallet && !stdenv.hostPlatform.isDarwin) [ db48 ]
     ++ lib.optionals withGui [ qrencode qtbase qttools ];
 
   configureFlags = [
diff --git a/pkgs/applications/blockchains/bitcoin/default.nix b/pkgs/applications/blockchains/bitcoin/default.nix
index 960ccf418306..e3eb1cf3bc31 100644
--- a/pkgs/applications/blockchains/bitcoin/default.nix
+++ b/pkgs/applications/blockchains/bitcoin/default.nix
@@ -54,15 +54,15 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs =
     [ autoreconfHook pkg-config installShellFiles ]
-    ++ lib.optionals stdenv.isLinux [ util-linux ]
-    ++ lib.optionals stdenv.isDarwin [ hexdump ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linux ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ hexdump ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ]
     ++ lib.optionals withGui [ wrapQtAppsHook ];
 
   buildInputs = [ boost libevent miniupnpc zeromq zlib ]
     ++ lib.optionals withWallet [ sqlite ]
     # building with db48 (for legacy descriptor wallet support) is broken on Darwin
-    ++ lib.optionals (withWallet && !stdenv.isDarwin) [ db48 ]
+    ++ lib.optionals (withWallet && !stdenv.hostPlatform.isDarwin) [ db48 ]
     ++ lib.optionals withGui [ qrencode qtbase qttools ];
 
   postInstall = ''
@@ -83,7 +83,7 @@ stdenv.mkDerivation rec {
     install -Dm644 share/pixmaps/bitcoin256.png $out/share/pixmaps/bitcoin.png
   '';
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export MACOSX_DEPLOYMENT_TARGET=10.13
   '';
 
diff --git a/pkgs/applications/blockchains/clightning/default.nix b/pkgs/applications/blockchains/clightning/default.nix
index ff049b69d7bc..9f84685e8c10 100644
--- a/pkgs/applications/blockchains/clightning/default.nix
+++ b/pkgs/applications/blockchains/clightning/default.nix
@@ -35,13 +35,13 @@ stdenv.mkDerivation rec {
   # as libwally-core detects the host as darwin and tries to add the -static
   # option to libtool, also we have to add the modified gsed package.
   nativeBuildInputs = [ autoconf autogen automake gettext libtool lowdown protobuf py3 unzip which ]
-    ++ lib.optionals stdenv.isDarwin [ cctools darwin.autoSignDarwinBinariesHook ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools darwin.autoSignDarwinBinariesHook ];
 
   buildInputs = [ gmp libsodium sqlite zlib jq ];
 
   # this causes some python trouble on a darwin host so we skip this step.
   # also we have to tell libwally-core to use sed instead of gsed.
-  postPatch = if !stdenv.isDarwin then ''
+  postPatch = if !stdenv.hostPlatform.isDarwin then ''
     patchShebangs \
       tools/generate-wire.py \
       tools/update-mocks.sh \
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
   # workaround for build issue, happens only x86_64-darwin, not aarch64-darwin
   # ccan/ccan/fdpass/fdpass.c:16:8: error: variable length array folded to constant array as an extension [-Werror,-Wgnu-folding-constant]
   #                 char buf[CMSG_SPACE(sizeof(fd))];
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) "-Wno-error=gnu-folding-constant";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "-Wno-error=gnu-folding-constant";
 
   # The `clnrest` plugin requires a Python environment to run
   postInstall = ''
diff --git a/pkgs/applications/blockchains/electrs/default.nix b/pkgs/applications/blockchains/electrs/default.nix
index f89b34097794..a31982666ab0 100644
--- a/pkgs/applications/blockchains/electrs/default.nix
+++ b/pkgs/applications/blockchains/electrs/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   ROCKSDB_INCLUDE_DIR = "${rocksdb}/include";
   ROCKSDB_LIB_DIR = "${rocksdb}/lib";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   passthru.updateScript = ./update.sh;
 
diff --git a/pkgs/applications/blockchains/elements/default.nix b/pkgs/applications/blockchains/elements/default.nix
index 90bc9195f9b5..01abe7c2974e 100644
--- a/pkgs/applications/blockchains/elements/default.nix
+++ b/pkgs/applications/blockchains/elements/default.nix
@@ -44,9 +44,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs =
     [ autoreconfHook pkg-config ]
-    ++ lib.optionals stdenv.isLinux [ util-linux ]
-    ++ lib.optionals stdenv.isDarwin [ hexdump ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linux ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ hexdump ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ]
     ++ lib.optionals withGui [ wrapQtAppsHook ];
 
   buildInputs = [ boost libevent miniupnpc zeromq zlib ]
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
 
   # fix "Killed: 9  test/test_bitcoin"
   # https://github.com/NixOS/nixpkgs/issues/179474
-  hardeningDisable = lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [ "fortify" "stackprotector" ];
+  hardeningDisable = lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin) [ "fortify" "stackprotector" ];
 
   nativeCheckInputs = [ python3 ];
 
diff --git a/pkgs/applications/blockchains/groestlcoin/default.nix b/pkgs/applications/blockchains/groestlcoin/default.nix
index e3acd14a5a9e..18861f021431 100644
--- a/pkgs/applications/blockchains/groestlcoin/default.nix
+++ b/pkgs/applications/blockchains/groestlcoin/default.nix
@@ -51,9 +51,9 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ autoreconfHook pkg-config installShellFiles ]
-    ++ lib.optionals stdenv.isLinux [ util-linux ]
-    ++ lib.optionals stdenv.isDarwin [ hexdump ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linux ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ hexdump ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ]
     ++ lib.optionals withGui [ wrapQtAppsHook ];
 
   buildInputs = [ boost libevent miniupnpc zeromq zlib ]
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
     install -Dm644 share/pixmaps/groestlcoin256.png $out/share/pixmaps/groestlcoin.png
   '';
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export MACOSX_DEPLOYMENT_TARGET=10.13
   '';
 
diff --git a/pkgs/applications/blockchains/haven-cli/default.nix b/pkgs/applications/blockchains/haven-cli/default.nix
index 2147f7cfc7de..e433aa562cf6 100644
--- a/pkgs/applications/blockchains/haven-cli/default.nix
+++ b/pkgs/applications/blockchains/haven-cli/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     zeromq pcsclite readline
     libsodium hidapi randomx rapidjson
     protobuf readline easyloggingpp
-  ] ++ lib.optionals stdenv.isDarwin [ IOKit CoreData PCSC ]
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit CoreData PCSC ]
     ++ lib.optionals trezorSupport [ libusb1 protobuf python3 ];
 
   cmakeFlags = [
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     "-DReadline_ROOT_DIR=${readline.dev}"
     "-DReadline_INCLUDE_DIR=${readline.dev}/include/readline"
     "-DRandomX_ROOT_DIR=${randomx}"
-  ] ++ lib.optional stdenv.isDarwin "-DBoost_USE_MULTITHREADED=OFF"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "-DBoost_USE_MULTITHREADED=OFF"
     ++ lib.optional (!trezorSupport) "-DUSE_DEVICE_TREZOR=OFF";
 
   outputs = [ "out" "source" ];
diff --git a/pkgs/applications/blockchains/lighthouse/default.nix b/pkgs/applications/blockchains/lighthouse/default.nix
index 83dd93effb15..4d1a81d5da1a 100644
--- a/pkgs/applications/blockchains/lighthouse/default.nix
+++ b/pkgs/applications/blockchains/lighthouse/default.nix
@@ -65,7 +65,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     rust-jemalloc-sys
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     Security
     SystemConfiguration
@@ -121,7 +121,7 @@ rustPlatform.buildRustPackage rec {
     "--skip persist::test_persist_caches"
     "--skip service::tests::tests::test_dht_persistence"
     "--skip time::test::test_reinsertion_updates_timeout"
-  ] ++ lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin) [
     "--skip subnet_service::tests::attestation_service::test_subscribe_same_subnet_several_slots_apart"
     "--skip subnet_service::tests::sync_committee_service::same_subscription_with_lower_until_epoch"
     "--skip subnet_service::tests::sync_committee_service::subscribe_and_unsubscribe"
diff --git a/pkgs/applications/blockchains/litecoin/default.nix b/pkgs/applications/blockchains/litecoin/default.nix
index 8a3c6a2657aa..0f923fb8f6b8 100644
--- a/pkgs/applications/blockchains/litecoin/default.nix
+++ b/pkgs/applications/blockchains/litecoin/default.nix
@@ -46,7 +46,7 @@ mkDerivation rec {
   nativeBuildInputs = [ pkg-config autoreconfHook ];
   buildInputs = [ openssl db48 boost zlib zeromq fmt
                   miniupnpc glib protobuf util-linux libevent ]
-                  ++ lib.optionals stdenv.isDarwin [ AppKit ]
+                  ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ]
                   ++ lib.optionals withGui [ qtbase qttools qrencode ];
 
   configureFlags = [ "--with-boost-libdir=${boost.out}/lib" ]
@@ -62,7 +62,7 @@ mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "Lite version of Bitcoin using scrypt as a proof-of-work algorithm";
     longDescription= ''
       Litecoin is a peer-to-peer Internet currency that enables instant payments
diff --git a/pkgs/applications/blockchains/miniscript/default.nix b/pkgs/applications/blockchains/miniscript/default.nix
index 8a842d507b0c..0c3ad55ab440 100644
--- a/pkgs/applications/blockchains/miniscript/default.nix
+++ b/pkgs/applications/blockchains/miniscript/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-qkYDzsl2Y4WEDDXs9cE/jIXm01jclkYUQbDGe1S0wYs=";
   };
 
-    postPatch = lib.optionalString stdenv.isDarwin ''
+    postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Replace hardcoded g++ with c++ so clang can be used
     # on darwin
     substituteInPlace Makefile \
diff --git a/pkgs/applications/blockchains/monero-cli/default.nix b/pkgs/applications/blockchains/monero-cli/default.nix
index 7cb476ce4edf..7e87695e78c8 100644
--- a/pkgs/applications/blockchains/monero-cli/default.nix
+++ b/pkgs/applications/blockchains/monero-cli/default.nix
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
       unbound
       zeromq
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       IOKit
       CoreData
     ]
@@ -92,7 +92,7 @@ stdenv.mkDerivation rec {
       libusb1
       protobuf_21
     ]
-    ++ lib.optionals (trezorSupport && stdenv.isLinux) [
+    ++ lib.optionals (trezorSupport && stdenv.hostPlatform.isLinux) [
       udev
     ];
 
@@ -104,7 +104,7 @@ stdenv.mkDerivation rec {
       "-DBUILD_GUI_DEPS=ON"
       "-DReadline_ROOT_DIR=${readline.dev}"
     ]
-    ++ lib.optional stdenv.isDarwin "-DBoost_USE_MULTITHREADED=OFF"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-DBoost_USE_MULTITHREADED=OFF"
     ++ lib.optional trezorSupport [
       "-DUSE_DEVICE_TREZOR=ON"
       # fix build on recent gcc versions
diff --git a/pkgs/applications/blockchains/monero-gui/default.nix b/pkgs/applications/blockchains/monero-gui/default.nix
index 7a8f5d4c26cb..7e8a5fe73dcd 100644
--- a/pkgs/applications/blockchains/monero-gui/default.nix
+++ b/pkgs/applications/blockchains/monero-gui/default.nix
@@ -73,14 +73,14 @@ stdenv.mkDerivation rec {
       unbound
       zeromq
     ]
-    ++ lib.optionals stdenv.isDarwin [ qtmacextras ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ qtmacextras ]
     ++ lib.optionals trezorSupport [
       hidapi
       libusb1
       protobuf_21
       python3
     ]
-    ++ lib.optionals (trezorSupport && stdenv.isLinux) [
+    ++ lib.optionals (trezorSupport && stdenv.hostPlatform.isLinux) [
       udev
     ];
 
diff --git a/pkgs/applications/blockchains/optimism/geth.nix b/pkgs/applications/blockchains/optimism/geth.nix
index 722402e704d3..473ee254d08f 100644
--- a/pkgs/applications/blockchains/optimism/geth.nix
+++ b/pkgs/applications/blockchains/optimism/geth.nix
@@ -37,7 +37,7 @@ buildGoModule rec {
 
   # Fix for usb-related segmentation faults on darwin
   propagatedBuildInputs =
-    lib.optionals stdenv.isDarwin [ libobjc IOKit ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit ];
 
   ldflags = [ "-s" "-w" ];
 
diff --git a/pkgs/applications/blockchains/particl-core/default.nix b/pkgs/applications/blockchains/particl-core/default.nix
index cacb8f5f4619..12e86358c954 100644
--- a/pkgs/applications/blockchains/particl-core/default.nix
+++ b/pkgs/applications/blockchains/particl-core/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Privacy-Focused Marketplace & Decentralized Application Platform";
     longDescription = ''
       An open source, decentralized privacy platform built for global person to person eCommerce.
diff --git a/pkgs/applications/blockchains/polkadot/default.nix b/pkgs/applications/blockchains/polkadot/default.nix
index 546348d3c433..65e945d77d30 100644
--- a/pkgs/applications/blockchains/polkadot/default.nix
+++ b/pkgs/applications/blockchains/polkadot/default.nix
@@ -69,8 +69,8 @@ rustPlatform.buildRustPackage rec {
 
   # NOTE: jemalloc is used by default on Linux with unprefixed enabled
   buildInputs = [ openssl ] ++
-    lib.optionals stdenv.isLinux [ rust-jemalloc-sys-unprefixed ] ++
-    lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+    lib.optionals stdenv.hostPlatform.isLinux [ rust-jemalloc-sys-unprefixed ] ++
+    lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   # NOTE: disable building `core`/`std` in wasm environment since rust-src isn't
   # available for `rustc-wasm32`
diff --git a/pkgs/applications/blockchains/snarkos/default.nix b/pkgs/applications/blockchains/snarkos/default.nix
index e4dc85f3c4d5..0cebbecc0309 100644
--- a/pkgs/applications/blockchains/snarkos/default.nix
+++ b/pkgs/applications/blockchains/snarkos/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   # buildAndTestSubdir = "cli";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config rustPlatform.bindgenHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config rustPlatform.bindgenHook ];
 
   # Needed to get openssl-sys to use pkg-config.
   OPENSSL_NO_VENDOR = 1;
@@ -35,11 +35,11 @@ rustPlatform.buildRustPackage rec {
   # ROCKSDB_INCLUDE_DIR="${rocksdb}/include";
   # ROCKSDB_LIB_DIR="${rocksdb}/lib";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security curl ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security curl ];
 
   # some tests are flaky and some need network access
   # TODO finish filtering the tests to enable them
-  doCheck = !stdenv.isLinux;
+  doCheck = !stdenv.hostPlatform.isLinux;
   # checkFlags = [
   #   # tries to make a network access
   #   "--skip=rpc::rpc::tests::test_send_transaction_large"
diff --git a/pkgs/applications/blockchains/solana-validator/default.nix b/pkgs/applications/blockchains/solana-validator/default.nix
index 0d664374efa0..5b18f5fc4cc4 100644
--- a/pkgs/applications/blockchains/solana-validator/default.nix
+++ b/pkgs/applications/blockchains/solana-validator/default.nix
@@ -75,8 +75,8 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config protobuf rustfmt perl rustPlatform.bindgenHook ];
   buildInputs =
-    [ openssl zlib libclang hidapi ] ++ (lib.optionals stdenv.isLinux [ udev ])
-    ++ lib.optionals stdenv.isDarwin [ Security System Libsystem libcxx ];
+    [ openssl zlib libclang hidapi ] ++ (lib.optionals stdenv.hostPlatform.isLinux [ udev ])
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security System Libsystem libcxx ];
   strictDeps = true;
 
   doCheck = false;
@@ -88,7 +88,7 @@ rustPlatform.buildRustPackage rec {
 
     # If set, always finds OpenSSL in the system, even if the vendored feature is enabled.
     OPENSSL_NO_VENDOR = "1";
-  } // lib.optionalAttrs stdenv.isDarwin {
+  } // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Require this on darwin otherwise the compiler starts rambling about missing
     # cmath functions
     CPPFLAGS = "-isystem ${lib.getDev libcxx}/include/c++/v1";
diff --git a/pkgs/applications/blockchains/teos/default.nix b/pkgs/applications/blockchains/teos/default.nix
index c2e4fb01384d..61299621e0fb 100644
--- a/pkgs/applications/blockchains/teos/default.nix
+++ b/pkgs/applications/blockchains/teos/default.nix
@@ -40,7 +40,7 @@ in
       rustfmt
     ];
 
-    buildInputs = lib.optionals stdenv.isDarwin [
+    buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
     ];
 
@@ -69,7 +69,7 @@ in
 
     buildInputs = [
       openssl
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
 
diff --git a/pkgs/applications/blockchains/ton/default.nix b/pkgs/applications/blockchains/ton/default.nix
index 517e18ff941e..3a9db76def4e 100644
--- a/pkgs/applications/blockchains/ton/default.nix
+++ b/pkgs/applications/blockchains/ton/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     # The build fails on darwin as:
     #   error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Fully decentralized layer-1 blockchain designed by Telegram";
     homepage = "https://ton.org/";
     changelog = "https://github.com/ton-blockchain/ton/blob/v${version}/Changelog.md";
diff --git a/pkgs/applications/blockchains/wownero/default.nix b/pkgs/applications/blockchains/wownero/default.nix
index 836532c00bad..7ec9f8d83ed8 100644
--- a/pkgs/applications/blockchains/wownero/default.nix
+++ b/pkgs/applications/blockchains/wownero/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
     readline
     unbound
     zeromq
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.IOKit
   ];
 
diff --git a/pkgs/applications/blockchains/zcash/default.nix b/pkgs/applications/blockchains/zcash/default.nix
index dbada09c1b6e..35a3bdb91e8a 100644
--- a/pkgs/applications/blockchains/zcash/default.nix
+++ b/pkgs/applications/blockchains/zcash/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage.override { inherit stdenv; } rec {
     hash = "sha256-XGq/cYUo43FcpmRDO2YiNLCuEQLsTFLBFC4M1wM29l8=";
   };
 
-  prePatch = lib.optionalString stdenv.isAarch64 ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isAarch64 ''
     substituteInPlace .cargo/config.offline \
       --replace "[target.aarch64-unknown-linux-gnu]" "" \
       --replace "linker = \"aarch64-linux-gnu-gcc\"" ""
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage.override { inherit stdenv; } rec {
     tl-expected
     utf8cpp
     zeromq
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/applications/display-managers/emptty/default.nix b/pkgs/applications/display-managers/emptty/default.nix
index de14859c983f..b4a55ece7675 100644
--- a/pkgs/applications/display-managers/emptty/default.nix
+++ b/pkgs/applications/display-managers/emptty/default.nix
@@ -27,7 +27,7 @@ buildGoModule rec {
     license = licenses.mit;
     maintainers = with maintainers; [ urandom ];
     # many undefined functions
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "emptty";
   };
 }
diff --git a/pkgs/applications/editors/codeblocks/default.nix b/pkgs/applications/editors/codeblocks/default.nix
index f22cafbbcec7..80fbe5674635 100644
--- a/pkgs/applications/editors/codeblocks/default.nix
+++ b/pkgs/applications/editors/codeblocks/default.nix
@@ -117,12 +117,12 @@ stdenv.mkDerivation rec {
     })
   ];
   preConfigure = "substituteInPlace ./configure --replace /usr/bin/file ${file}/bin/file";
-  postConfigure = lib.optionalString stdenv.isLinux "substituteInPlace libtool --replace ldconfig ${stdenv.cc.libc.bin}/bin/ldconfig";
+  postConfigure = lib.optionalString stdenv.hostPlatform.isLinux "substituteInPlace libtool --replace ldconfig ${stdenv.cc.libc.bin}/bin/ldconfig";
   configureFlags = [ "--enable-pch=no" ] ++ lib.optionals contribPlugins [
-    ("--with-contrib-plugins=all,-FileManager" + lib.optionalString stdenv.isDarwin ",-NassiShneiderman")
+    ("--with-contrib-plugins=all,-FileManager" + lib.optionalString stdenv.hostPlatform.isDarwin ",-NassiShneiderman")
     "--with-boost-libdir=${boost}/lib"
   ];
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/lib/codeblocks/plugins $out/share/codeblocks/plugins
   '';
 
diff --git a/pkgs/applications/editors/dit/default.nix b/pkgs/applications/editors/dit/default.nix
index d0ded7ae72bd..d809348b3f52 100644
--- a/pkgs/applications/editors/dit/default.nix
+++ b/pkgs/applications/editors/dit/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ ncurses lua ]
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   # fix paths
   prePatch = ''
diff --git a/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix b/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix
index d61d83bb5aaa..e680e1f7e63e 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix
@@ -253,7 +253,7 @@ let
                   pkgs.zlib.dev
                   pkgs.cairo.dev
                 ]
-                ++ lib.optional pkgs.stdenv.isLinux pkgs.stdenv.cc.libc.dev
+                ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.stdenv.cc.libc.dev
               )
             )} server/epdfinfo
           '';
@@ -303,7 +303,7 @@ let
             rm -rf $out/share/emacs/site-lisp/elpa/*/server
           '';
           dontUseCmakeBuildDir = true;
-          doCheck = pkgs.stdenv.isLinux;
+          doCheck = pkgs.stdenv.hostPlatform.isLinux;
           buildInputs = old.buildInputs ++ [ pkgs.llvmPackages.libclang ];
           nativeBuildInputs = old.nativeBuildInputs ++ [ pkgs.cmake pkgs.llvmPackages.llvm ];
         });
@@ -702,7 +702,7 @@ let
 
         # Build a helper executable that interacts with the macOS Dictionary.app
         osx-dictionary =
-          if pkgs.stdenv.isDarwin
+          if pkgs.stdenv.hostPlatform.isDarwin
           then super.osx-dictionary.overrideAttrs (old: {
             buildInputs =
               old.buildInputs ++
diff --git a/pkgs/applications/editors/emacs/make-emacs.nix b/pkgs/applications/editors/emacs/make-emacs.nix
index cbcd022c3d35..bdd80f8922a3 100644
--- a/pkgs/applications/editors/emacs/make-emacs.nix
+++ b/pkgs/applications/editors/emacs/make-emacs.nix
@@ -67,26 +67,26 @@
 , withAlsaLib ? false
 , withAthena ? false
 , withCsrc ? true
-, withDbus ? stdenv.isLinux
+, withDbus ? stdenv.hostPlatform.isLinux
 , withGTK3 ? withPgtk && !noGui
 , withGlibNetworking ? withPgtk || withGTK3 || (withX && withXwidgets)
-, withGpm ? stdenv.isLinux
+, withGpm ? stdenv.hostPlatform.isLinux
 , withImageMagick ? lib.versionOlder version "27" && (withX || withNS)
 # Emacs 30+ has native JSON support
 , withJansson ? lib.versionOlder version "30"
 , withMailutils ? true
 , withMotif ? false
-, withNS ? stdenv.isDarwin && !(variant == "macport" || noGui)
+, withNS ? stdenv.hostPlatform.isDarwin && !(variant == "macport" || noGui)
 , withPgtk ? false
-, withSelinux ? stdenv.isLinux
+, withSelinux ? stdenv.hostPlatform.isLinux
 , withSQLite3 ? lib.versionAtLeast version "29"
 , withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd
 , withToolkitScrollBars ? true
 , withTreeSitter ? lib.versionAtLeast version "29"
 , withWebP ? lib.versionAtLeast version "29"
-, withX ? !(stdenv.isDarwin || noGui || withPgtk)
+, withX ? !(stdenv.hostPlatform.isDarwin || noGui || withPgtk)
 , withXinput2 ? withX && lib.versionAtLeast version "29"
-, withXwidgets ? !stdenv.isDarwin && !noGui && (withGTK3 || withPgtk)
+, withXwidgets ? !stdenv.hostPlatform.isDarwin && !noGui && (withGTK3 || withPgtk)
 , withSmallJaDic ? false
 , withCompressInstall ? true
 
@@ -117,10 +117,10 @@
 assert (withGTK3 && !withNS && variant != "macport") -> withX || withPgtk;
 
 assert noGui -> !(withX || withGTK3 || withNS || variant == "macport");
-assert withAcl -> stdenv.isLinux;
-assert withAlsaLib -> stdenv.isLinux;
-assert withGpm -> stdenv.isLinux;
-assert withNS -> stdenv.isDarwin && !(withX || variant == "macport");
+assert withAcl -> stdenv.hostPlatform.isLinux;
+assert withAlsaLib -> stdenv.hostPlatform.isLinux;
+assert withGpm -> stdenv.hostPlatform.isLinux;
+assert withNS -> stdenv.hostPlatform.isDarwin && !(withX || variant == "macport");
 assert withPgtk -> withGTK3 && !withX;
 assert withXwidgets -> !noGui && (withGTK3 || withPgtk);
 
@@ -229,9 +229,9 @@ mkDerivation (finalAttrs: {
     dbus
   ] ++ lib.optionals withSelinux [
     libselinux
-  ] ++ lib.optionals (!stdenv.isDarwin && withGTK3) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin && withGTK3) [
     gsettings-desktop-schemas
-  ] ++ lib.optionals (stdenv.isLinux && withX) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && withX) [
     libotf
     m17n_lib
   ] ++ lib.optionals (withX && withGTK3) [
@@ -275,7 +275,7 @@ mkDerivation (finalAttrs: {
     libXi
   ] ++ lib.optionals withXwidgets [
     webkitgtk
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     sigtool
   ] ++ lib.optionals withNS [
     librsvg
@@ -332,7 +332,7 @@ mkDerivation (finalAttrs: {
     (lib.withFeature true "mac")
     (lib.withFeature true "xml2")
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (lib.withFeature withNS "ns")
   ]
   ++ [
@@ -399,7 +399,7 @@ mkDerivation (finalAttrs: {
       -f batch-native-compile $out/share/emacs/site-lisp/site-start.el
   '';
 
-  postFixup = lib.optionalString (stdenv.isLinux && withX && toolkit == "lucid") ''
+  postFixup = lib.optionalString (stdenv.hostPlatform.isLinux && withX && toolkit == "lucid") ''
       patchelf --add-rpath ${lib.makeLibraryPath [ libXcursor ]} $out/bin/emacs
       patchelf --add-needed "libXcursor.so.1" "$out/bin/emacs"
   '';
diff --git a/pkgs/applications/editors/gedit/default.nix b/pkgs/applications/editors/gedit/default.nix
index 7a7d05df52e8..7a1edc7294b1 100644
--- a/pkgs/applications/editors/gedit/default.nix
+++ b/pkgs/applications/editors/gedit/default.nix
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
     libgedit-gtksourceview
     libgedit-tepl
     libpeas
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gtk-mac-integration
   ];
 
diff --git a/pkgs/applications/editors/heh/default.nix b/pkgs/applications/editors/heh/default.nix
index bd7907f7682c..f89ee5a76a0a 100644
--- a/pkgs/applications/editors/heh/default.nix
+++ b/pkgs/applications/editors/heh/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-eqWBTylvXqGhWdSGHdTM1ZURSD5pkUBoBOvBJ5zmJ7w=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     AppKit
   ]);
 
diff --git a/pkgs/applications/editors/jetbrains/default.nix b/pkgs/applications/editors/jetbrains/default.nix
index 8188a82c2c80..0e3241a0397c 100644
--- a/pkgs/applications/editors/jetbrains/default.nix
+++ b/pkgs/applications/editors/jetbrains/default.nix
@@ -39,7 +39,7 @@ let
 
   products = versions.${system} or (throw "Unsupported system: ${system}");
 
-  package = if stdenv.isDarwin then ./bin/darwin.nix else ./bin/linux.nix;
+  package = if stdenv.hostPlatform.isDarwin then ./bin/darwin.nix else ./bin/linux.nix;
   mkJetBrainsProductCore = callPackage package { inherit vmopts; };
   mkMeta = meta: fromSource: {
     inherit (meta) homepage longDescription;
@@ -47,7 +47,7 @@ let
     maintainers = map (x: lib.maintainers."${x}") meta.maintainers;
     license = if meta.isOpenSource then lib.licenses.asl20 else lib.licenses.unfree;
     sourceProvenance = if fromSource then [ lib.sourceTypes.fromSource ] else
-      (if stdenv.isDarwin then [ lib.sourceTypes.binaryNativeCode ] else [ lib.sourceTypes.binaryBytecode ]);
+      (if stdenv.hostPlatform.isDarwin then [ lib.sourceTypes.binaryNativeCode ] else [ lib.sourceTypes.binaryBytecode ]);
   };
 
   mkJetBrainsProduct =
@@ -85,7 +85,7 @@ let
     });
 
   buildPycharm = args:
-    (mkJetBrainsProduct args).overrideAttrs (finalAttrs: previousAttrs: lib.optionalAttrs stdenv.isLinux {
+    (mkJetBrainsProduct args).overrideAttrs (finalAttrs: previousAttrs: lib.optionalAttrs stdenv.hostPlatform.isLinux {
       buildInputs = with python3.pkgs; (previousAttrs.buildInputs or []) ++ [ python3 setuptools ];
       preInstall = ''
         echo "compiling cython debug speedups"
@@ -106,7 +106,7 @@ rec {
 
   clion = (mkJetBrainsProduct {
     pname = "clion";
-    extraBuildInputs = lib.optionals (stdenv.isLinux) [
+    extraBuildInputs = lib.optionals (stdenv.hostPlatform.isLinux) [
       fontconfig
       python3
       stdenv.cc.cc
@@ -114,13 +114,13 @@ rec {
       libxcrypt-legacy
       lttng-ust_2_12
       musl
-    ] ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       expat
       libxml2
       xz
     ];
   }).overrideAttrs (attrs: {
-    postInstall = (attrs.postInstall or "") + lib.optionalString (stdenv.isLinux) ''
+    postInstall = (attrs.postInstall or "") + lib.optionalString (stdenv.hostPlatform.isLinux) ''
       (
         cd $out/clion
 
@@ -131,7 +131,7 @@ rec {
       )
     '';
 
-    postFixup = (attrs.postFixup or "") + lib.optionalString (stdenv.isLinux) ''
+    postFixup = (attrs.postFixup or "") + lib.optionalString (stdenv.hostPlatform.isLinux) ''
       (
         cd $out/clion
 
@@ -175,7 +175,7 @@ rec {
     extraBuildInputs = [ libgcc stdenv.cc.cc ];
   }).overrideAttrs
     (attrs: {
-      postFixup = (attrs.postFixup or "") + lib.optionalString stdenv.isLinux ''
+      postFixup = (attrs.postFixup or "") + lib.optionalString stdenv.hostPlatform.isLinux ''
         interp="$(cat $NIX_CC/nix-support/dynamic-linker)"
         patchelf --set-interpreter $interp $out/goland/plugins/go-plugin/lib/dlv/linux/dlv
         chmod +x $out/goland/plugins/go-plugin/lib/dlv/linux/dlv
@@ -186,7 +186,7 @@ rec {
 
   idea-community-src = buildIdea { pname = "idea-community"; extraBuildInputs = [ stdenv.cc.cc ]; fromSource = true; };
 
-  idea-community = if stdenv.isDarwin || stdenv.isAarch64 then idea-community-bin else idea-community-src;
+  idea-community = if stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isAarch64 then idea-community-bin else idea-community-src;
 
   idea-ultimate = buildIdea { pname = "idea-ultimate"; extraBuildInputs = [ stdenv.cc.cc lldb musl ]; };
 
@@ -198,7 +198,7 @@ rec {
 
   pycharm-community-src = buildPycharm { pname = "pycharm-community"; fromSource = true; };
 
-  pycharm-community = if stdenv.isDarwin then pycharm-community-bin else pycharm-community-src;
+  pycharm-community = if stdenv.hostPlatform.isDarwin then pycharm-community-bin else pycharm-community-src;
 
   pycharm-professional = buildPycharm { pname = "pycharm-professional"; extraBuildInputs = [ musl ]; };
 
@@ -211,14 +211,14 @@ rec {
         libxcrypt
         lttng-ust_2_12
         musl
-      ]++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+      ]++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
         expat
         libxml2
         xz
       ];
 
     }).overrideAttrs (attrs: {
-      postInstall = (attrs.postInstall or "") + lib.optionalString (stdenv.isLinux) ''
+      postInstall = (attrs.postInstall or "") + lib.optionalString (stdenv.hostPlatform.isLinux) ''
         (
           cd $out/rider
 
@@ -240,20 +240,20 @@ rec {
 
   rust-rover = (mkJetBrainsProduct {
     pname = "rust-rover";
-    extraBuildInputs = lib.optionals (stdenv.isLinux) [
+    extraBuildInputs = lib.optionals (stdenv.hostPlatform.isLinux) [
       python3
       openssl
       libxcrypt-legacy
       fontconfig
       xorg.libX11
       libGL
-    ] ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       expat
       libxml2
       xz
     ];
   }).overrideAttrs (attrs: {
-    postFixup = (attrs.postFixup or "") + lib.optionalString (stdenv.isLinux) ''
+    postFixup = (attrs.postFixup or "") + lib.optionalString (stdenv.hostPlatform.isLinux) ''
       (
         cd $out/rust-rover
 
diff --git a/pkgs/applications/editors/jetbrains/plugins/specialPlugins.nix b/pkgs/applications/editors/jetbrains/plugins/specialPlugins.nix
index dcd6554c791d..574938eef0d3 100644
--- a/pkgs/applications/editors/jetbrains/plugins/specialPlugins.nix
+++ b/pkgs/applications/editors/jetbrains/plugins/specialPlugins.nix
@@ -27,7 +27,7 @@
     buildInputs = [ delve ];
     buildPhase =
       let
-        arch = (if stdenv.isLinux then "linux" else "mac") + (if stdenv.isAarch64 then "arm" else "");
+        arch = (if stdenv.hostPlatform.isLinux then "linux" else "mac") + (if stdenv.hostPlatform.isAarch64 then "arm" else "");
       in ''
         runHook preBuild
         ln -sf ${delve}/bin/dlv lib/dlv/${arch}/dlv
diff --git a/pkgs/applications/editors/lapce/default.nix b/pkgs/applications/editors/lapce/default.nix
index 8de4d1882bc5..68ff13a0212a 100644
--- a/pkgs/applications/editors/lapce/default.nix
+++ b/pkgs/applications/editors/lapce/default.nix
@@ -25,7 +25,7 @@
 , xorg
 }:
 let
-  rpathLibs = lib.optionals stdenv.isLinux [
+  rpathLibs = lib.optionals stdenv.hostPlatform.isLinux [
     libGL
     libxkbcommon
     xorg.libX11
@@ -89,9 +89,9 @@ rustPlatform.buildRustPackage rec {
     glib
     gtk3
     openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     fontconfig
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libobjc
     Security
     CoreServices
@@ -100,7 +100,7 @@ rustPlatform.buildRustPackage rec {
     AppKit
   ];
 
-  postInstall = if stdenv.isLinux then ''
+  postInstall = if stdenv.hostPlatform.isLinux then ''
     install -Dm0644 $src/extra/images/logo.svg $out/share/icons/hicolor/scalable/apps/dev.lapce.lapce.svg
     install -Dm0644 $src/extra/linux/dev.lapce.lapce.desktop $out/share/applications/lapce.desktop
 
@@ -125,6 +125,6 @@ rustPlatform.buildRustPackage rec {
     maintainers = with maintainers; [ elliot ];
     mainProgram = "lapce";
     # Undefined symbols for architecture x86_64: "_NSPasteboardTypeFileURL"
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/applications/editors/libresprite/default.nix b/pkgs/applications/editors/libresprite/default.nix
index 02e225a5ffe0..5d4031b064ec 100644
--- a/pkgs/applications/editors/libresprite/default.nix
+++ b/pkgs/applications/editors/libresprite/default.nix
@@ -69,7 +69,7 @@ stdenv.mkDerivation (finalAttrs: {
     SDL2_image
     lua
     # no v8 due to missing libplatform and libbase
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DWITH_WEBP_SUPPORT=ON"
   ];
 
-  hardeningDisable = lib.optional stdenv.isDarwin "format";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isDarwin "format";
 
   # Install mime icons. Note that the mimetype is still "x-aseprite"
   postInstall = ''
@@ -116,6 +116,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
     # https://github.com/LibreSprite/LibreSprite/issues/308
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/editors/lite-xl/default.nix b/pkgs/applications/editors/lite-xl/default.nix
index 55fce51ac9f7..ac13fc3bf566 100644
--- a/pkgs/applications/editors/lite-xl/default.nix
+++ b/pkgs/applications/editors/lite-xl/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     lua5_4
     pcre2
     SDL2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
   ];
 
diff --git a/pkgs/applications/editors/mindforger/default.nix b/pkgs/applications/editors/mindforger/default.nix
index bd8a4b0c648e..db4d65de7959 100644
--- a/pkgs/applications/editors/mindforger/default.nix
+++ b/pkgs/applications/editors/mindforger/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     "CONFIG+=mfwebengine"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir "$out"/Applications
     mv app/mindforger.app "$out"/Applications/
   '';
diff --git a/pkgs/applications/editors/nedit/default.nix b/pkgs/applications/editors/nedit/default.nix
index 374c5ee28c84..d329220409c3 100644
--- a/pkgs/applications/editors/nedit/default.nix
+++ b/pkgs/applications/editors/nedit/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ motif libXpm libXt ];
 
   # the linux config works fine on darwin too!
-  buildFlags = lib.optional (stdenv.isLinux || stdenv.isDarwin) "linux";
+  buildFlags = lib.optional (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin) "linux";
 
   env.NIX_CFLAGS_COMPILE = "-DBUILD_UNTESTED_NEDIT -L${motif}/lib";
 
diff --git a/pkgs/applications/editors/neovim/gnvim/wrapper.nix b/pkgs/applications/editors/neovim/gnvim/wrapper.nix
index 1cf02746f9ae..7869885d1b74 100644
--- a/pkgs/applications/editors/neovim/gnvim/wrapper.nix
+++ b/pkgs/applications/editors/neovim/gnvim/wrapper.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation {
     makeWrapper '${gnvim-unwrapped}/bin/gnvim' "$out/bin/gnvim" \
       --prefix PATH : "${neovim}/bin" \
       --set GNVIM_RUNTIME_PATH "${gnvim-unwrapped}/share/gnvim/runtime"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir -p "$out/share"
     ln -s '${gnvim-unwrapped}/share/icons' "$out/share/icons"
 
diff --git a/pkgs/applications/editors/neovim/wrapper.nix b/pkgs/applications/editors/neovim/wrapper.nix
index 8b31ed0a2a38..8bcd1b5ebbd6 100644
--- a/pkgs/applications/editors/neovim/wrapper.nix
+++ b/pkgs/applications/editors/neovim/wrapper.nix
@@ -105,7 +105,7 @@ let
       luaRcContent = rcContent;
       # Remove the symlinks created by symlinkJoin which we need to perform
       # extra actions upon
-      postBuild = lib.optionalString stdenv.isLinux ''
+      postBuild = lib.optionalString stdenv.hostPlatform.isLinux ''
         rm $out/share/applications/nvim.desktop
         substitute ${neovim-unwrapped}/share/applications/nvim.desktop $out/share/applications/nvim.desktop \
           --replace-warn 'Name=Neovim' 'Name=Neovim wrapper'
diff --git a/pkgs/applications/editors/notepad-next/default.nix b/pkgs/applications/editors/notepad-next/default.nix
index 45004d470281..2a20691351d1 100644
--- a/pkgs/applications/editors/notepad-next/default.nix
+++ b/pkgs/applications/editors/notepad-next/default.nix
@@ -27,7 +27,7 @@ mkDerivation rec {
       --replace '$$[QT_INSTALL_TRANSLATIONS]/qt_zh_CN.qm' ""
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mv $out/bin $out/Applications
     rm -fr $out/share
   '';
@@ -38,7 +38,7 @@ mkDerivation rec {
     license = licenses.gpl3Plus;
     platforms = platforms.unix;
     maintainers = [ maintainers.sebtm ];
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     mainProgram = "NotepadNext";
   };
 }
diff --git a/pkgs/applications/editors/nvi/default.nix b/pkgs/applications/editors/nvi/default.nix
index 2001ba2497d1..c5ef872bffff 100644
--- a/pkgs/applications/editors/nvi/default.nix
+++ b/pkgs/applications/editors/nvi/default.nix
@@ -35,6 +35,6 @@ stdenv.mkDerivation rec {
     description = "Berkeley Vi Editor";
     license = licenses.free;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/nvi.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/nvi.x86_64-darwin
   };
 }
diff --git a/pkgs/applications/editors/qxmledit/default.nix b/pkgs/applications/editors/qxmledit/default.nix
index 1991b2a7bc77..946a56917d63 100644
--- a/pkgs/applications/editors/qxmledit/default.nix
+++ b/pkgs/applications/editors/qxmledit/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   dontWrapQtApps = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Simple XML editor based on qt libraries";
     homepage = "https://sourceforge.net/projects/qxmledit";
     license = licenses.lgpl2;
diff --git a/pkgs/applications/editors/rehex/default.nix b/pkgs/applications/editors/rehex/default.nix
index 55e737a78039..f6f1bf2b28b1 100644
--- a/pkgs/applications/editors/rehex/default.nix
+++ b/pkgs/applications/editors/rehex/default.nix
@@ -30,19 +30,19 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config which zip ]
-    ++ lib.optionals stdenv.isDarwin [ libicns ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libicns ];
 
   buildInputs = [ botan3 capstone jansson libunistring wxGTK32 ]
     ++ (with lua53Packages; [ lua busted ])
     ++ (with perlPackages; [ perl TemplateToolkit ])
-    ++ lib.optionals stdenv.isLinux [ gtk3 ]
-    ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa IOKit ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ gtk3 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa IOKit ];
 
   makeFlags = [
     "prefix=${placeholder "out"}"
     "BOTAN_PKG=botan-3"
     "CXXSTD=-std=c++20"
-  ] ++ lib.optionals stdenv.isDarwin [ "-f Makefile.osx" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-f Makefile.osx" ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/applications/editors/rstudio/default.nix b/pkgs/applications/editors/rstudio/default.nix
index 4d606904e2f6..55998bcbe3c9 100644
--- a/pkgs/applications/editors/rstudio/default.nix
+++ b/pkgs/applications/editors/rstudio/default.nix
@@ -212,7 +212,7 @@ in
     '';
 
     meta = {
-      broken = (stdenv.isLinux && stdenv.isAarch64);
+      broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
       inherit description;
       homepage = "https://www.rstudio.com/";
       license = lib.licenses.agpl3Only;
diff --git a/pkgs/applications/editors/sublime/2/default.nix b/pkgs/applications/editors/sublime/2/default.nix
index 6c9a43779f76..a57fc8d7de90 100644
--- a/pkgs/applications/editors/sublime/2/default.nix
+++ b/pkgs/applications/editors/sublime/2/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     echo ${libPath}
     patchelf \
       --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
-      --set-rpath ${libPath}:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.is64bit "64"} \
+      --set-rpath ${libPath}:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"} \
       $out/sublime/sublime_text
 
     mkdir -p $out/share/icons
diff --git a/pkgs/applications/editors/sublime/3/common.nix b/pkgs/applications/editors/sublime/3/common.nix
index ad89c80fc8e4..7eff7d9bf4df 100644
--- a/pkgs/applications/editors/sublime/3/common.nix
+++ b/pkgs/applications/editors/sublime/3/common.nix
@@ -65,7 +65,7 @@ let
       for binary in ${ builtins.concatStringsSep " " binaries }; do
         patchelf \
           --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
-          --set-rpath ${libPath}:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.is64bit "64"} \
+          --set-rpath ${libPath}:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"} \
           $binary
       done
 
@@ -92,7 +92,7 @@ let
 
     postFixup = ''
       wrapProgram $out/sublime_bash \
-        --set LD_PRELOAD "${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.is64bit "64"}/libgcc_s.so.1"
+        --set LD_PRELOAD "${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"}/libgcc_s.so.1"
 
       wrapProgram $out/${primaryBinary} \
         --set LD_PRELOAD "${libredirect}/lib/libredirect.so" \
@@ -101,7 +101,7 @@ let
         "''${gappsWrapperArgs[@]}"
 
       # Without this, plugin_host crashes, even though it has the rpath
-      wrapProgram $out/plugin_host --prefix LD_PRELOAD : ${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.is64bit "64"}/libgcc_s.so.1:${lib.getLib openssl}/lib/libssl.so:${bzip2.out}/lib/libbz2.so
+      wrapProgram $out/plugin_host --prefix LD_PRELOAD : ${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"}/libgcc_s.so.1:${lib.getLib openssl}/lib/libssl.so:${bzip2.out}/lib/libbz2.so
     '';
   };
 in stdenv.mkDerivation (rec {
diff --git a/pkgs/applications/editors/sublime/4/common.nix b/pkgs/applications/editors/sublime/4/common.nix
index 730f9c10b8f5..b594633ea3cb 100644
--- a/pkgs/applications/editors/sublime/4/common.nix
+++ b/pkgs/applications/editors/sublime/4/common.nix
@@ -88,7 +88,7 @@ let
       for binary in ${builtins.concatStringsSep " " binaries}; do
         patchelf \
           --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
-          --set-rpath ${lib.makeLibraryPath neededLibraries}:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.is64bit "64"} \
+          --set-rpath ${lib.makeLibraryPath neededLibraries}:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"} \
           $binary
       done
 
diff --git a/pkgs/applications/editors/texmacs/default.nix b/pkgs/applications/editors/texmacs/default.nix
index ce8939dfc34d..92d162cdc300 100644
--- a/pkgs/applications/editors/texmacs/default.nix
+++ b/pkgs/applications/editors/texmacs/default.nix
@@ -58,18 +58,18 @@ stdenv.mkDerivation {
     sqlite
     git
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     qtmacextras
   ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     (lib.cmakeFeature "TEXMACS_GUI" "Qt")
     (lib.cmakeFeature "CMAKE_INSTALL_PREFIX" "./TeXmacs.app/Contents/Resources")
   ];
 
   env.NIX_LDFLAGS = "-lz";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv TeXmacs.app $out/Applications/
     makeWrapper $out/Applications/TeXmacs.app/Contents/MacOS/TeXmacs $out/bin/texmacs
@@ -87,7 +87,7 @@ stdenv.mkDerivation {
     ])
   ];
 
-  postFixup = lib.optionalString (!stdenv.isDarwin) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     wrapQtApp $out/bin/texmacs
   '';
 
diff --git a/pkgs/applications/editors/texstudio/default.nix b/pkgs/applications/editors/texstudio/default.nix
index f0bed0eb3863..728ff5525e98 100644
--- a/pkgs/applications/editors/texstudio/default.nix
+++ b/pkgs/applications/editors/texstudio/default.nix
@@ -28,11 +28,11 @@ stdenv.mkDerivation (finalAttrs: {
     qttools
     quazip
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p "$out/Applications"
     mv "$out/bin/texstudio.app" "$out/Applications"
     rm -d "$out/bin"
diff --git a/pkgs/applications/editors/texworks/default.nix b/pkgs/applications/editors/texworks/default.nix
index 4ddd4c9cb6c1..a20bc426b3ca 100644
--- a/pkgs/applications/editors/texworks/default.nix
+++ b/pkgs/applications/editors/texworks/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     qttools
   ] ++ lib.optional withLua lua
     ++ lib.optional withPython python3
-    ++ lib.optional stdenv.isLinux qtwayland;
+    ++ lib.optional stdenv.hostPlatform.isLinux qtwayland;
 
   cmakeFlags = [
     "-DQT_DEFAULT_MAJOR_VERSION=6"
diff --git a/pkgs/applications/editors/tijolo/default.nix b/pkgs/applications/editors/tijolo/default.nix
index 060c30a171a6..54f0f154ab37 100644
--- a/pkgs/applications/editors/tijolo/default.nix
+++ b/pkgs/applications/editors/tijolo/default.nix
@@ -38,7 +38,7 @@ crystal.buildCrystalPackage rec {
   '';
 
   nativeBuildInputs = [ wrapGAppsHook4 gobject-introspection ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
   buildInputs = [ gtk4 libadwaita vte-gtk4 libgit2 gtksourceview5 editorconfig-core-c ];
 
   buildTargets = [ "all" ];
diff --git a/pkgs/applications/editors/vim/full.nix b/pkgs/applications/editors/vim/full.nix
index 663dc5b688c7..5183ee5d39f2 100644
--- a/pkgs/applications/editors/vim/full.nix
+++ b/pkgs/applications/editors/vim/full.nix
@@ -11,7 +11,7 @@
 
 , features          ? "huge" # One of tiny, small, normal, big or huge
 , wrapPythonDrv     ? false
-, guiSupport        ? config.vim.gui or (if stdenv.isDarwin then "gtk2" else "gtk3")
+, guiSupport        ? config.vim.gui or (if stdenv.hostPlatform.isDarwin then "gtk2" else "gtk3")
 , luaSupport        ? config.vim.lua or true
 , perlSupport       ? config.vim.perl or false      # Perl interpreter
 , pythonSupport     ? config.vim.python or true     # Python interpreter
@@ -104,7 +104,7 @@ in stdenv.mkDerivation {
     "vim_cv_memmove_handles_overlap=yes"
   ]
     ++ lib.optional (guiSupport == "gtk2" || guiSupport == "gtk3") "--enable-gui=${guiSupport}"
-  ++ lib.optional stdenv.isDarwin
+  ++ lib.optional stdenv.hostPlatform.isDarwin
      (if darwinSupport then "--enable-darwin" else "--disable-darwin")
   ++ lib.optionals luaSupport [
     "--with-lua-prefix=${lua}"
@@ -163,7 +163,7 @@ in stdenv.mkDerivation {
     ++ lib.optional sodiumSupport libsodium;
 
   # error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-fdeclspec";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-fdeclspec";
 
   preConfigure = lib.optionalString ftNixSupport ''
       cp ${vimPlugins.vim-nix.src}/ftplugin/nix.vim runtime/ftplugin/nix.vim
@@ -176,7 +176,7 @@ in stdenv.mkDerivation {
 
   postInstall = ''
     ln -s $out/bin/vim $out/bin/vi
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     ln -sfn '${nixosRuntimepath}' "$out"/share/vim/vimrc
   '';
 
diff --git a/pkgs/applications/editors/vim/plugins/avante-nvim/default.nix b/pkgs/applications/editors/vim/plugins/avante-nvim/default.nix
index 0572977f207b..f3218a0f2ea4 100644
--- a/pkgs/applications/editors/vim/plugins/avante-nvim/default.nix
+++ b/pkgs/applications/editors/vim/plugins/avante-nvim/default.nix
@@ -47,7 +47,7 @@ let
       [
         openssl
       ]
-      ++ lib.optionals stdenv.isDarwin [
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [
         darwin.apple_sdk.frameworks.Security
       ];
 
diff --git a/pkgs/applications/editors/vim/plugins/overrides.nix b/pkgs/applications/editors/vim/plugins/overrides.nix
index 24876a338736..3d2d9f05881a 100644
--- a/pkgs/applications/editors/vim/plugins/overrides.nix
+++ b/pkgs/applications/editors/vim/plugins/overrides.nix
@@ -478,7 +478,7 @@ in
 
         buildInputs = [
           libuv.dev
-        ] ++ lib.optionals stdenv.isDarwin [
+        ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
           darwin.apple_sdk.frameworks.AppKit
         ];
       };
@@ -492,7 +492,7 @@ in
       # Note: the destination should be generator.so, even on darwin
       # https://github.com/mistricky/codesnap.nvim/blob/main/scripts/build_generator.sh
       postInstall = let
-        extension = if stdenv.isDarwin then "dylib" else "so";
+        extension = if stdenv.hostPlatform.isDarwin then "dylib" else "so";
       in ''
         rm -r $out/lua/*.so
         cp ${codesnap-lib}/lib/libgenerator.${extension} $out/lua/generator.so
@@ -597,7 +597,7 @@ in
         rev = "cd97c25320fb0a672b11bcd95d8332bb3088ecce";
         hash = "sha256-66NtKteM1mvHP5wAU4e9JbsF+bq91lmCDcTh/6RPhoo=";
       };
-      extension = if stdenv.isDarwin then "dylib" else "so";
+      extension = if stdenv.hostPlatform.isDarwin then "dylib" else "so";
       rustPackage = rustPlatform.buildRustPackage {
         pname = "cord.nvim-rust";
         inherit version src;
@@ -1003,11 +1003,11 @@ in
         src = LanguageClient-neovim-src;
 
         cargoHash = "sha256-H34UqJ6JOwuSABdOup5yKeIwFrGc83TUnw1ggJEx9o4=";
-        buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+        buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
         # FIXME: Use impure version of CoreFoundation because of missing symbols.
         #   Undefined symbols for architecture x86_64: "_CFURLResourceIsReachable"
-        preConfigure = lib.optionalString stdenv.isDarwin ''
+        preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
           export NIX_LDFLAGS="-F${CoreFoundation}/Library/Frameworks -framework CoreFoundation $NIX_LDFLAGS"
         '';
       };
@@ -1541,7 +1541,7 @@ in
 
         buildInputs =
           [ openssl ]
-          ++ lib.optionals stdenv.isDarwin [
+          ++ lib.optionals stdenv.hostPlatform.isDarwin [
             darwin.apple_sdk.frameworks.Security
             darwin.apple_sdk.frameworks.SystemConfiguration
           ];
@@ -1593,7 +1593,7 @@ in
         pname = "sniprun-bin";
         inherit version src;
 
-        buildInputs = lib.optionals stdenv.isDarwin [
+        buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
           darwin.apple_sdk.frameworks.Security
         ];
 
@@ -1895,7 +1895,7 @@ in
   };
 
   vim-addon-manager = super.vim-addon-manager.overrideAttrs {
-    buildInputs = lib.optional stdenv.isDarwin Cocoa;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin Cocoa;
   };
 
   vim-addon-mru = super.vim-addon-mru.overrideAttrs {
@@ -1956,7 +1956,7 @@ in
     src = old.src.overrideAttrs (srcOld: {
       postFetch =
         (srcOld.postFetch or "")
-        + lib.optionalString (!stdenv.isDarwin) ''
+        + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
           rm $out/colors/darkBlue.vim
         '';
     });
diff --git a/pkgs/applications/editors/vim/plugins/vim-clap/default.nix b/pkgs/applications/editors/vim/plugins/vim-clap/default.nix
index 84a906b9e882..391370c54efd 100644
--- a/pkgs/applications/editors/vim/plugins/vim-clap/default.nix
+++ b/pkgs/applications/editors/vim/plugins/vim-clap/default.nix
@@ -49,7 +49,7 @@ let
     buildInputs = [
       libgit2
       zlib
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/applications/editors/vim/vimacs.nix b/pkgs/applications/editors/vim/vimacs.nix
index e65439df5236..e54ac39b2ae4 100644
--- a/pkgs/applications/editors/vim/vimacs.nix
+++ b/pkgs/applications/editors/vim/vimacs.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, config, vim-full, macvim, vimPlugins
-, useMacvim ? stdenv.isDarwin && (config.vimacs.macvim or true)
+, useMacvim ? stdenv.hostPlatform.isDarwin && (config.vimacs.macvim or true)
 , vimacsExtraArgs ? "" }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix b/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix
index d0b27457b68a..686ff8652a45 100644
--- a/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix
@@ -8,9 +8,9 @@ let
   version = "1.54.0";
   rescript-editor-analysis = callPackage ./rescript-editor-analysis.nix { inherit version; };
   arch =
-    if stdenv.isLinux then
+    if stdenv.hostPlatform.isLinux then
       "linux"
-    else if stdenv.isDarwin then
+    else if stdenv.hostPlatform.isDarwin then
       "darwin"
     else
       throw "Unsupported system: ${stdenv.system}";
diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index cade496d6b53..7a6c1e0417b8 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -1069,7 +1069,7 @@ let
             version = "0.8.44";
           }
           // sources.${stdenv.system};
-        nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+        nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
         buildInputs = [ stdenv.cc.cc.lib ];
         meta = {
           description = "Open-source autopilot for software development - bring the power of ChatGPT to your IDE";
@@ -3223,7 +3223,7 @@ let
             version = "2.1.11";
           }
           // sources.${stdenv.system};
-        nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+        nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
         buildInputs = [
           stdenv.cc.cc.lib
           zlib
diff --git a/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix b/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix
index 8d665025bba2..68a3673134ce 100644
--- a/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csdevkit/default.nix
@@ -106,7 +106,7 @@ buildVscodeMarketplaceExtension {
         chmod +x "${bin}"
       '') extInfo.binaries
     ))
-    + lib.optionalString stdenv.isLinux (
+    + lib.optionalString stdenv.hostPlatform.isLinux (
       lib.concatStringsSep "\n" (
         map (bin: ''
           patchelf_common "${bin}"
diff --git a/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csharp/default.nix b/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csharp/default.nix
index 9c26f92ca961..3e988c627219 100644
--- a/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csharp/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/ms-dotnettools.csharp/default.nix
@@ -99,7 +99,7 @@ buildVscodeMarketplaceExtension {
         chmod +x "${bin}"
       '') extInfo.binaries
     ))
-    + lib.optionalString stdenv.isLinux (
+    + lib.optionalString stdenv.hostPlatform.isLinux (
       lib.concatStringsSep "\n" (
         map (bin: ''
           patchelf_common "${bin}"
diff --git a/pkgs/applications/editors/vscode/extensions/rust-lang.rust-analyzer/default.nix b/pkgs/applications/editors/vscode/extensions/rust-lang.rust-analyzer/default.nix
index a53fc7b8ca5b..e937da9c44b3 100644
--- a/pkgs/applications/editors/vscode/extensions/rust-lang.rust-analyzer/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/rust-lang.rust-analyzer/default.nix
@@ -52,7 +52,7 @@ let
         pkg-config
         libsecret
       ]
-      ++ lib.optionals stdenv.isDarwin [
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [
         darwin.apple_sdk.frameworks.AppKit
         darwin.apple_sdk.frameworks.Security
       ];
diff --git a/pkgs/applications/editors/vscode/extensions/sourcery.sourcery/default.nix b/pkgs/applications/editors/vscode/extensions/sourcery.sourcery/default.nix
index d9c3ee2358e2..0e61678a8f4b 100644
--- a/pkgs/applications/editors/vscode/extensions/sourcery.sourcery/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/sourcery.sourcery/default.nix
@@ -16,11 +16,11 @@ vscode-utils.buildVscodeMarketplaceExtension {
 
   postPatch = ''
     pushd sourcery_binaries/install
-    rm -r win ${if stdenv.isLinux then "mac" else "linux"}
+    rm -r win ${if stdenv.hostPlatform.isLinux then "mac" else "linux"}
     popd
   '';
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [
     stdenv.cc.cc.lib
diff --git a/pkgs/applications/editors/vscode/extensions/vadimcn.vscode-lldb/default.nix b/pkgs/applications/editors/vscode/extensions/vadimcn.vscode-lldb/default.nix
index 0d55381e6597..20b81c3c70cd 100644
--- a/pkgs/applications/editors/vscode/extensions/vadimcn.vscode-lldb/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/vadimcn.vscode-lldb/default.nix
@@ -41,11 +41,11 @@ let
 
     cargoHash = "sha256-e/Jki/4pCs0qzaBVR4iiUhdBFmWlTZYREQkuFSoWYFo=";
 
-    buildInputs = lib.optionals stdenv.isDarwin [ lldb ];
+    buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ lldb ];
 
     nativeBuildInputs = [ makeWrapper ];
 
-    env = lib.optionalAttrs stdenv.isDarwin { NIX_LDFLAGS = "-llldb -lc++abi"; };
+    env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { NIX_LDFLAGS = "-llldb -lc++abi"; };
 
     buildAndTestSubdir = "adapter";
 
@@ -90,7 +90,7 @@ let
 
     buildInputs =
       [ libsecret ]
-      ++ lib.optionals stdenv.isDarwin (
+      ++ lib.optionals stdenv.hostPlatform.isDarwin (
         with darwin.apple_sdk.frameworks;
         [
           Security
@@ -114,7 +114,7 @@ let
   # entitlement which nixpkgs' lldb-server does not yet provide; see
   # <https://github.com/NixOS/nixpkgs/pull/38624> for details
   lldbServer =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       "/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Versions/A/Resources/debugserver"
     else
       "${lldb.out}/bin/lldb-server";
@@ -150,7 +150,7 @@ stdenv.mkDerivation {
     ''
       cp -r ${nodeDeps}/lib/node_modules .
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       export HOME="$TMPDIR/home"
       mkdir $HOME
     '';
@@ -161,7 +161,7 @@ stdenv.mkDerivation {
   ];
   makeFlags = [ "vsix_bootstrap" ];
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export HOME=$TMPDIR
   '';
 
diff --git a/pkgs/applications/editors/vscode/generic.nix b/pkgs/applications/editors/vscode/generic.nix
index f2807a1b592d..defae3cf9617 100644
--- a/pkgs/applications/editors/vscode/generic.nix
+++ b/pkgs/applications/editors/vscode/generic.nix
@@ -157,12 +157,12 @@ in
   ];
 
   buildInputs = [ libsecret libXScrnSaver libxshmfence ]
-    ++ lib.optionals (!stdenv.isDarwin) [ alsa-lib at-spi2-atk libkrb5 mesa nss nspr systemd xorg.libxkbfile ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ alsa-lib at-spi2-atk libkrb5 mesa nss nspr systemd xorg.libxkbfile ];
 
-  runtimeDependencies = lib.optionals stdenv.isLinux [ (lib.getLib systemd) fontconfig.lib libdbusmenu wayland libsecret ];
+  runtimeDependencies = lib.optionals stdenv.hostPlatform.isLinux [ (lib.getLib systemd) fontconfig.lib libdbusmenu wayland libsecret ];
 
   nativeBuildInputs = [ unzip ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
     asar
     copyDesktopItems
@@ -176,7 +176,7 @@ in
 
   installPhase = ''
     runHook preInstall
-  '' + (if stdenv.isDarwin then ''
+  '' + (if stdenv.hostPlatform.isDarwin then ''
     mkdir -p "$out/Applications/${longName}.app" "$out/bin"
     cp -r ./* "$out/Applications/${longName}.app"
     ln -s "$out/Applications/${longName}.app/Contents/Resources/app/bin/${sourceExecutableName}" "$out/bin/${executableName}"
@@ -205,7 +205,7 @@ in
   preFixup = ''
     gappsWrapperArgs+=(
         ${ # we cannot use runtimeDependencies otherwise libdbusmenu do not work on kde
-          lib.optionalString stdenv.isLinux
+          lib.optionalString stdenv.hostPlatform.isLinux
           "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ libdbusmenu ]}"}
       # Add gio to PATH so that moving files to the trash works when not using a desktop environment
       --prefix PATH : ${glib.bin}/bin
@@ -216,7 +216,7 @@ in
 
   # See https://github.com/NixOS/nixpkgs/issues/49643#issuecomment-873853897
   # linux only because of https://github.com/NixOS/nixpkgs/issues/138729
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     # this is a fix for "save as root" functionality
     packed="resources/app/node_modules.asar"
     unpacked="resources/app/node_modules"
@@ -234,7 +234,7 @@ in
   '' + (
     let
       vscodeRipgrep =
-        if stdenv.isDarwin then
+        if stdenv.hostPlatform.isDarwin then
           "Contents/Resources/app/node_modules.asar.unpacked/@vscode/ripgrep/bin/rg"
         else
           "resources/app/node_modules/@vscode/ripgrep/bin/rg";
@@ -247,7 +247,7 @@ in
     ''
   );
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf \
       --add-needed ${libglvnd}/lib/libGLESv2.so.2 \
       --add-needed ${libglvnd}/lib/libGL.so.1 \
diff --git a/pkgs/applications/editors/vscode/vscode.nix b/pkgs/applications/editors/vscode/vscode.nix
index 3a2528cde7fd..35f6601d60be 100644
--- a/pkgs/applications/editors/vscode/vscode.nix
+++ b/pkgs/applications/editors/vscode/vscode.nix
@@ -10,9 +10,9 @@
 # documented in https://wiki.nixos.org/wiki/Visual_Studio_Code#Insiders_Build
 # On MacOS the insider binary is still called code instead of code-insiders as
 # of 2023-08-06.
-, sourceExecutableName ? "code" + lib.optionalString (isInsiders && stdenv.isLinux) "-insiders"
+, sourceExecutableName ? "code" + lib.optionalString (isInsiders && stdenv.hostPlatform.isLinux) "-insiders"
 , commandLineArgs ? ""
-, useVSCodeRipgrep ? stdenv.isDarwin
+, useVSCodeRipgrep ? stdenv.hostPlatform.isDarwin
 }:
 
 let
@@ -27,7 +27,7 @@ let
     armv7l-linux = "linux-armhf";
   }.${system} or throwSystem;
 
-  archive_fmt = if stdenv.isDarwin then "zip" else "tar.gz";
+  archive_fmt = if stdenv.hostPlatform.isDarwin then "zip" else "tar.gz";
 
   sha256 = {
     x86_64-linux = "0475kwa3ym14l9ggaf2hg4lcrc0lpi9vchzj4sgj4c3606l9i1aa";
@@ -79,7 +79,7 @@ in
     # Editing the `code` binary within the app bundle causes the bundle's signature
     # to be invalidated, which prevents launching starting with macOS Ventura, because VS Code is notarized.
     # See https://eclecticlight.co/2022/06/17/app-security-changes-coming-in-ventura/ for more information.
-    dontFixup = stdenv.isDarwin;
+    dontFixup = stdenv.hostPlatform.isDarwin;
 
     meta = with lib; {
       description = ''
diff --git a/pkgs/applications/editors/vscode/vscodium.nix b/pkgs/applications/editors/vscode/vscodium.nix
index 312e49e8d02b..54a1a98ad7c6 100644
--- a/pkgs/applications/editors/vscode/vscodium.nix
+++ b/pkgs/applications/editors/vscode/vscodium.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, callPackage, fetchurl, nixosTests, commandLineArgs ? "", useVSCodeRipgrep ? stdenv.isDarwin }:
+{ lib, stdenv, callPackage, fetchurl, nixosTests, commandLineArgs ? "", useVSCodeRipgrep ? stdenv.hostPlatform.isDarwin }:
 
 let
   inherit (stdenv.hostPlatform) system;
@@ -12,7 +12,7 @@ let
     armv7l-linux = "linux-armhf";
   }.${system} or throwSystem;
 
-  archive_fmt = if stdenv.isDarwin then "zip" else "tar.gz";
+  archive_fmt = if stdenv.hostPlatform.isDarwin then "zip" else "tar.gz";
 
   sha256 = {
     x86_64-linux = "14pqi5l7zbkhpsl8hd7mqss4xkqnxf0f0h5bs710iadpcscgpndf";
@@ -22,7 +22,7 @@ let
     armv7l-linux = "1rjv5c85ffy5szxhf71kjmvxiahyyvx2dl6183v5q7apv9pa64hj";
   }.${system} or throwSystem;
 
-  sourceRoot = lib.optionalString (!stdenv.isDarwin) ".";
+  sourceRoot = lib.optionalString (!stdenv.hostPlatform.isDarwin) ".";
 in
   callPackage ./generic.nix rec {
     inherit sourceRoot commandLineArgs useVSCodeRipgrep;
diff --git a/pkgs/applications/editors/vscode/with-extensions.nix b/pkgs/applications/editors/vscode/with-extensions.nix
index bbe5fec19d91..25c97f52d765 100644
--- a/pkgs/applications/editors/vscode/with-extensions.nix
+++ b/pkgs/applications/editors/vscode/with-extensions.nix
@@ -68,7 +68,7 @@ runCommand "${wrappedPkgName}-with-extensions-${wrappedPkgVersion}" {
   dontPatchELF = true;
   dontStrip = true;
   meta = vscode.meta;
-} (if stdenv.isDarwin then ''
+} (if stdenv.hostPlatform.isDarwin then ''
   mkdir -p $out/bin/
   mkdir -p "$out/Applications/${longName}.app/Contents/MacOS"
 
diff --git a/pkgs/applications/editors/wxhexeditor/default.nix b/pkgs/applications/editors/wxhexeditor/default.nix
index 23ef7a0ef567..eee370d174e0 100644
--- a/pkgs/applications/editors/wxhexeditor/default.nix
+++ b/pkgs/applications/editors/wxhexeditor/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = lib.optionals stdenv.cc.isClang [
     openmp
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
diff --git a/pkgs/applications/editors/xedit/default.nix b/pkgs/applications/editors/xedit/default.nix
index 6fa4a67dfd6b..eb8f2ee92592 100644
--- a/pkgs/applications/editors/xedit/default.nix
+++ b/pkgs/applications/editors/xedit/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   };
 
   # ./lisp/mathimp.c:493:10: error: implicitly declaring library function 'finite' with type 'int (double)'
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for i in $(find . -type f -name "*.c"); do
       substituteInPlace $i --replace "finite" "isfinite"
     done
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ shamilton ];
     platforms = platforms.unix;
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "xedit";
   };
 }
diff --git a/pkgs/applications/editors/xmlcopyeditor/default.nix b/pkgs/applications/editors/xmlcopyeditor/default.nix
index fe3a12a37c20..0c58d35042ae 100644
--- a/pkgs/applications/editors/xmlcopyeditor/default.nix
+++ b/pkgs/applications/editors/xmlcopyeditor/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     pcre2
     wxGTK32
     xercesc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
diff --git a/pkgs/applications/editors/zee/default.nix b/pkgs/applications/editors/zee/default.nix
index 38ca48ee4056..cea97686072c 100644
--- a/pkgs/applications/editors/zee/default.nix
+++ b/pkgs/applications/editors/zee/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # disable downloading and building the tree-sitter grammars at build time
   # grammars can be configured in a config file and installed with `zee --build`
diff --git a/pkgs/applications/emulators/86box/default.nix b/pkgs/applications/emulators/86box/default.nix
index f4e1827c8e62..ac306cf5cdec 100644
--- a/pkgs/applications/emulators/86box/default.nix
+++ b/pkgs/applications/emulators/86box/default.nix
@@ -33,7 +33,7 @@
   enableDynarec ? with stdenv.hostPlatform; isx86 || isAarch,
   enableNewDynarec ? enableDynarec && stdenv.hostPlatform.isAarch,
   enableVncRenderer ? false,
-  enableWayland ? stdenv.isLinux,
+  enableWayland ? stdenv.hostPlatform.isLinux,
   unfreeEnableDiscord ? false,
   unfreeEnableRoms ? false,
 }:
@@ -88,20 +88,20 @@ stdenv.mkDerivation (finalAttrs: {
       libopus.dev
       libmpg123.dev
     ]
-    ++ lib.optional stdenv.isLinux alsa-lib
+    ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib
     ++ lib.optional enableWayland wayland
     ++ lib.optional enableVncRenderer libvncserver
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk_11_0.libs.xpc;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk_11_0.libs.xpc;
 
   cmakeFlags =
-    lib.optional stdenv.isDarwin "-DCMAKE_MACOSX_BUNDLE=OFF"
+    lib.optional stdenv.hostPlatform.isDarwin "-DCMAKE_MACOSX_BUNDLE=OFF"
     ++ lib.optional enableNewDynarec "-DNEW_DYNAREC=ON"
     ++ lib.optional enableVncRenderer "-DVNC=ON"
     ++ lib.optional (!enableDynarec) "-DDYNAREC=OFF"
     ++ lib.optional (!unfreeEnableDiscord) "-DDISCORD=OFF";
 
   postInstall =
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       install -Dm644 -t $out/share/applications $src/src/unix/assets/net.86box.86Box.desktop
 
       for size in 48 64 72 96 128 192 256 512; do
@@ -129,7 +129,7 @@ stdenv.mkDerivation (finalAttrs: {
   preFixup =
     let
       libPath = lib.makeLibraryPath ([ libpcap ] ++ lib.optional unfreeEnableDiscord discord-gamesdk);
-      libPathVar = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+      libPathVar = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     in
     ''
       makeWrapperArgs+=(--prefix ${libPathVar} : "${libPath}")
diff --git a/pkgs/applications/emulators/bsnes/ares/default.nix b/pkgs/applications/emulators/bsnes/ares/default.nix
index f7fd332c7a33..df08235529e5 100644
--- a/pkgs/applications/emulators/bsnes/ares/default.nix
+++ b/pkgs/applications/emulators/bsnes/ares/default.nix
@@ -44,14 +44,14 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
     which
     wrapGAppsHook3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libicns
   ];
 
   buildInputs = [
     SDL2
     libao
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     gtk3
     gtksourceview3
@@ -62,7 +62,7 @@ stdenv.mkDerivation (finalAttrs: {
     libpulseaudio
     openal
     udev
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Cocoa
     darwin.apple_sdk_11_0.frameworks.OpenAL
   ];
@@ -71,9 +71,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  makeFlags = lib.optionals stdenv.isLinux [
+  makeFlags = lib.optionals stdenv.hostPlatform.isLinux [
     "hiro=gtk3"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "hiro=cocoa"
     "lto=false"
     "vulkan=false"
@@ -83,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
     "prefix=$(out)"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-mmacosx-version-min=10.14";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-mmacosx-version-min=10.14";
 
   meta = {
     homepage = "https://ares-emu.net";
@@ -92,7 +92,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.isc;
     maintainers = with lib.maintainers; [ Madouura AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
 # TODO: select between Qt and GTK3
diff --git a/pkgs/applications/emulators/bsnes/bsnes-hd/default.nix b/pkgs/applications/emulators/bsnes/bsnes-hd/default.nix
index 354437e7c7b0..046192df920f 100644
--- a/pkgs/applications/emulators/bsnes/bsnes-hd/default.nix
+++ b/pkgs/applications/emulators/bsnes/bsnes-hd/default.nix
@@ -47,26 +47,26 @@ stdenv.mkDerivation {
   ];
 
   nativeBuildInputs = [ pkg-config ]
-    ++ lib.optionals stdenv.isLinux [ wrapGAppsHook3 ]
-    ++ lib.optionals stdenv.isDarwin [ libicns makeWrapper ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ wrapGAppsHook3 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libicns makeWrapper ];
 
   buildInputs = [ SDL2 libao ]
-    ++ lib.optionals stdenv.isLinux [ libX11 libXv udev gtk3 gtksourceview3 alsa-lib openal libpulseaudio ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa OpenAL ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libX11 libXv udev gtk3 gtksourceview3 alsa-lib openal libpulseaudio ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa OpenAL ];
 
   enableParallelBuilding = true;
 
   makeFlags = [ "-C" "bsnes" "prefix=$(out)" ]
-    ++ lib.optionals stdenv.isLinux [ "hiro=gtk3" ]
-    ++ lib.optionals stdenv.isDarwin [ "hiro=cocoa" ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ "hiro=gtk3" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "hiro=cocoa" ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/bin
     makeWrapper $out/{Applications/bsnes.app/Contents/MacOS,bin}/bsnes
   '';
 
   # https://github.com/bsnes-emu/bsnes/issues/107
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     gappsWrapperArgs+=(
       --prefix GDK_BACKEND : x11
     )
diff --git a/pkgs/applications/emulators/bsnes/higan/default.nix b/pkgs/applications/emulators/bsnes/higan/default.nix
index 17700859ca3a..3eb9a9a310ec 100644
--- a/pkgs/applications/emulators/bsnes/higan/default.nix
+++ b/pkgs/applications/emulators/bsnes/higan/default.nix
@@ -33,14 +33,14 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libicns
   ];
 
   buildInputs = [
     SDL2
     libao
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     gtk3
     gtksourceview3
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
     openal
     udev
   ]
-  ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Carbon
     Cocoa
     OpenAL
@@ -72,13 +72,13 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildPhase = let
     platform =
-      if stdenv.isLinux
+      if stdenv.hostPlatform.isLinux
       then "linux"
-      else if stdenv.isDarwin
+      else if stdenv.hostPlatform.isDarwin
       then "macos"
-      else if stdenv.isBSD
+      else if stdenv.hostPlatform.isBSD
       then "bsd"
-      else if stdenv.isWindows
+      else if stdenv.hostPlatform.isWindows
       then "windows"
       else throw "Unknown platform for higan: ${stdenv.hostPlatform.system}";
   in ''
@@ -105,7 +105,7 @@ stdenv.mkDerivation (finalAttrs: {
   installPhase = ''
     runHook preInstall
 
-  '' + (if stdenv.isDarwin then ''
+  '' + (if stdenv.hostPlatform.isDarwin then ''
     mkdir ${placeholder "out"}
     mv higan/out/higan.app ${placeholder "out"}/
     mv icarus/out/icarus.app ${placeholder "out"}/
@@ -134,7 +134,7 @@ stdenv.mkDerivation (finalAttrs: {
     # we create a first-run script to populate
     # $HOME with all the stuff needed at runtime
     let
-      dest = if stdenv.isDarwin
+      dest = if stdenv.hostPlatform.isDarwin
            then "\\$HOME/Library/Application Support/higan"
            else "\\$HOME/higan";
     in ''
@@ -171,7 +171,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
 # TODO: select between Qt and GTK3
diff --git a/pkgs/applications/emulators/dolphin-emu/default.nix b/pkgs/applications/emulators/dolphin-emu/default.nix
index 123ca313ec85..91ad4b876eb9 100644
--- a/pkgs/applications/emulators/dolphin-emu/default.nix
+++ b/pkgs/applications/emulators/dolphin-emu/default.nix
@@ -71,7 +71,7 @@ stdenv.mkDerivation (finalAttrs: {
     cmake
     pkg-config
     wrapQtAppsHook
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     xcbuild # for plutil
   ];
 
@@ -104,7 +104,7 @@ stdenv.mkDerivation (finalAttrs: {
     xz
     # Causes linker errors with minizip-ng, prefer vendored. Possible reason why: https://github.com/dolphin-emu/dolphin/pull/12070#issuecomment-1677311838
     #zlib-ng
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     bluez
     libevdev
@@ -115,7 +115,7 @@ stdenv.mkDerivation (finalAttrs: {
     #mgba # Derivation doesn't support Darwin
     udev
     vulkan-loader
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreBluetooth
     ForceFeedback
     IOBluetooth
@@ -130,7 +130,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DDOLPHIN_WC_REVISION=${finalAttrs.src.rev}"
     "-DDOLPHIN_WC_DESCRIBE=${finalAttrs.version}"
     "-DDOLPHIN_WC_BRANCH=master"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOSX_USE_DEFAULT_SEARCH_PATH=True"
     "-DUSE_BUNDLED_MOLTENVK=OFF"
     "-DMACOS_CODE_SIGNING=OFF"
@@ -141,7 +141,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DENABLE_AUTOUPDATE=OFF"
   ];
 
-  qtWrapperArgs = lib.optionals stdenv.isLinux [
+  qtWrapperArgs = lib.optionals stdenv.hostPlatform.isLinux [
     "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ vulkan-loader ]}"
     # https://bugs.dolphin-emu.org/issues/11807
     # The .desktop file should already set this, but Dolphin may be launched in other ways
diff --git a/pkgs/applications/emulators/dolphin-emu/primehack.nix b/pkgs/applications/emulators/dolphin-emu/primehack.nix
index 6a2727478389..c35700856b60 100644
--- a/pkgs/applications/emulators/dolphin-emu/primehack.nix
+++ b/pkgs/applications/emulators/dolphin-emu/primehack.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     pkg-config
     cmake
-  ] ++ lib.optional stdenv.isLinux wrapQtAppsHook;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux wrapQtAppsHook;
 
   buildInputs = [
     curl
@@ -93,13 +93,13 @@ stdenv.mkDerivation rec {
     fmt
     xz
     qtbase
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     bluez
     udev
     libevdev
     alsa-lib
     vulkan-loader
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreBluetooth
     OpenGL
     ForceFeedback
@@ -109,11 +109,11 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DUSE_SHARED_ENET=ON"
     "-DENABLE_LTO=ON"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOSX_USE_DEFAULT_SEARCH_PATH=True"
   ];
 
-  qtWrapperArgs = lib.optionals stdenv.isLinux [
+  qtWrapperArgs = lib.optionals stdenv.hostPlatform.isLinux [
     "--prefix LD_LIBRARY_PATH : ${vulkan-loader}/lib"
     # https://bugs.dolphin-emu.org/issues/11807
     # The .desktop file should already set this, but Dolphin may be launched in other ways
@@ -123,7 +123,7 @@ stdenv.mkDerivation rec {
   # - Allow Dolphin to use nix-provided libraries instead of building them
   postPatch = ''
     substituteInPlace CMakeLists.txt --replace 'DISTRIBUTOR "None"' 'DISTRIBUTOR "NixOS"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt --replace 'if(NOT APPLE)' 'if(true)'
     substituteInPlace CMakeLists.txt --replace 'if(LIBUSB_FOUND AND NOT APPLE)' 'if(LIBUSB_FOUND)'
   '';
@@ -144,7 +144,7 @@ stdenv.mkDerivation rec {
     description = "Gamecube/Wii/Triforce emulator for x86_64 and ARMv8";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ Madouura ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     platforms = platforms.unix;
   };
 }
diff --git a/pkgs/applications/emulators/dosbox/default.nix b/pkgs/applications/emulators/dosbox/default.nix
index 2a1171ccf3b7..50805ae20dbb 100644
--- a/pkgs/applications/emulators/dosbox/default.nix
+++ b/pkgs/applications/emulators/dosbox/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
-  configureFlags = lib.optional stdenv.isDarwin "--disable-sdltest";
+  configureFlags = lib.optional stdenv.hostPlatform.isDarwin "--disable-sdltest";
 
   desktopItems = [
     (makeDesktopItem {
diff --git a/pkgs/applications/emulators/goldberg-emu/default.nix b/pkgs/applications/emulators/goldberg-emu/default.nix
index 8b1e92b5963a..e165a36b317b 100644
--- a/pkgs/applications/emulators/goldberg-emu/default.nix
+++ b/pkgs/applications/emulators/goldberg-emu/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://gitlab.com/Mr_Goldberg/goldberg_emulator";
     changelog = "https://gitlab.com/Mr_Goldberg/goldberg_emulator/-/releases";
     description = "Program that emulates steam online features";
diff --git a/pkgs/applications/emulators/mame/default.nix b/pkgs/applications/emulators/mame/default.nix
index fae7a0d3fcf9..25018c56aa66 100644
--- a/pkgs/applications/emulators/mame/default.nix
+++ b/pkgs/applications/emulators/mame/default.nix
@@ -90,8 +90,8 @@ stdenv.mkDerivation rec {
     sqlite
     qtbase
   ]
-  ++ lib.optionals stdenv.isLinux [ alsa-lib libpulseaudio libXinerama libXi fontconfig ]
-  ++ lib.optionals stdenv.isDarwin [ libpcap CoreAudioKit ForceFeedback ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libpulseaudio libXinerama libXi fontconfig ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ libpcap CoreAudioKit ForceFeedback ];
 
   nativeBuildInputs = [
     copyDesktopItems
@@ -195,7 +195,7 @@ stdenv.mkDerivation rec {
     license = with licenses; [ bsd3 gpl2Plus ];
     maintainers = with maintainers; [ thiagokokada ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "mame";
   };
 }
diff --git a/pkgs/applications/emulators/retroarch/cores.nix b/pkgs/applications/emulators/retroarch/cores.nix
index 532109eefa6d..18c510b8465b 100644
--- a/pkgs/applications/emulators/retroarch/cores.nix
+++ b/pkgs/applications/emulators/retroarch/cores.nix
@@ -267,7 +267,7 @@ in
       let
         # linux = bsd
         # https://github.com/DerKoun/bsnes-hd/blob/f0b6cf34e9780d53516977ed2de64137a8bcc3c5/bsnes/GNUmakefile#L37
-        platform = if stdenv.isDarwin then "macos" else "linux";
+        platform = if stdenv.hostPlatform.isDarwin then "macos" else "linux";
       in
       [
         "-C"
diff --git a/pkgs/applications/emulators/retroarch/default.nix b/pkgs/applications/emulators/retroarch/default.nix
index 83cb0b2bbc63..b23a5e3c9bb3 100644
--- a/pkgs/applications/emulators/retroarch/default.nix
+++ b/pkgs/applications/emulators/retroarch/default.nix
@@ -2,9 +2,9 @@
 , stdenv
 , nixosTests
 , enableNvidiaCgToolkit ? false
-, withGamemode ? stdenv.isLinux
-, withVulkan ? stdenv.isLinux
-, withWayland ? stdenv.isLinux
+, withGamemode ? stdenv.hostPlatform.isLinux
+, withVulkan ? stdenv.hostPlatform.isLinux
+, withWayland ? stdenv.hostPlatform.isLinux
 , alsa-lib
 , dbus
 , fetchFromGitHub
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
   lib.optional enableNvidiaCgToolkit nvidia_cg_toolkit ++
   lib.optional withVulkan vulkan-loader ++
   lib.optional withWayland wayland ++
-  lib.optionals stdenv.isLinux [
+  lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     dbus
     libX11
@@ -103,7 +103,7 @@ stdenv.mkDerivation rec {
     "--disable-update_assets"
     "--disable-update_core_info"
   ] ++
-  lib.optionals stdenv.isLinux [
+  lib.optionals stdenv.hostPlatform.isLinux [
     "--enable-dbus"
     "--enable-egl"
     "--enable-kms"
@@ -142,6 +142,6 @@ stdenv.mkDerivation rec {
     # https://docs.libretro.com/development/retroarch/compilation/osx/
     # and
     # https://github.com/libretro/RetroArch/blob/71eb74d256cb4dc5b8b43991aec74980547c5069/.gitlab-ci.yml#L330
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/emulators/ripes/default.nix b/pkgs/applications/emulators/ripes/default.nix
index 92b7aca0a144..312c25a02007 100644
--- a/pkgs/applications/emulators/ripes/default.nix
+++ b/pkgs/applications/emulators/ripes/default.nix
@@ -39,11 +39,11 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -r Ripes.app $out/Applications/
     makeBinaryWrapper $out/Applications/Ripes.app/Contents/MacOS/Ripes $out/bin/Ripes
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     install -D Ripes $out/bin/Ripes
   '' + ''
     cp -r ${src}/appdir/usr/share $out/share
diff --git a/pkgs/applications/emulators/ruffle/default.nix b/pkgs/applications/emulators/ruffle/default.nix
index 481b5ec86654..55b2ce67fc9b 100644
--- a/pkgs/applications/emulators/ruffle/default.nix
+++ b/pkgs/applications/emulators/ruffle/default.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs =
     [ jre_minimal ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       glib
       gsettings-desktop-schemas
       makeWrapper
@@ -46,10 +46,10 @@ rustPlatform.buildRustPackage {
       python3
       wrapGAppsHook3
     ]
-    ++ lib.optionals stdenv.isDarwin [ rustPlatform.bindgenHook ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ rustPlatform.bindgenHook ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
       cairo
       gtk3
@@ -64,11 +64,11 @@ rustPlatform.buildRustPackage {
       vulkan-loader
       udev
     ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AppKit ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AppKit ];
 
   dontWrapGApps = true;
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/ruffle_desktop \
       --add-needed libxkbcommon-x11.so \
       --add-needed libwayland-client.so \
@@ -80,7 +80,7 @@ rustPlatform.buildRustPackage {
       # This name is too generic
       mv $out/bin/exporter $out/bin/ruffle_exporter
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       vulkanWrapperArgs+=(
         --prefix LD_LIBRARY_PATH ':' ${vulkan-loader}/lib
       )
diff --git a/pkgs/applications/emulators/tamatool/default.nix b/pkgs/applications/emulators/tamatool/default.nix
index 04e5452bf72d..82cd8e9a2528 100644
--- a/pkgs/applications/emulators/tamatool/default.nix
+++ b/pkgs/applications/emulators/tamatool/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation (finalAttrs: {
     libpng
     SDL2
     SDL2_image
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
 
diff --git a/pkgs/applications/emulators/wine/base.nix b/pkgs/applications/emulators/wine/base.nix
index dccf67a7a9bb..cff069a2e75c 100644
--- a/pkgs/applications/emulators/wine/base.nix
+++ b/pkgs/applications/emulators/wine/base.nix
@@ -23,7 +23,7 @@ let
     };
   } ./setup-hook-darwin.sh;
 
-  darwinFrameworks = lib.optionals stdenv.isDarwin (
+  darwinFrameworks = lib.optionals stdenv.hostPlatform.isDarwin (
     toBuildInputs pkgArches (pkgs: with pkgs.buildPackages.darwin.apple_sdk.frameworks; [
       CoreServices Foundation ForceFeedback AppKit OpenGL IOKit DiskArbitration PCSC Security
       ApplicationServices AudioToolbox CoreAudio AudioUnit CoreMIDI OpenCL Cocoa Carbon
@@ -40,7 +40,7 @@ let
 in
 stdenv.mkDerivation (finalAttrs:
 lib.optionalAttrs (buildScript != null) { builder = buildScript; }
-// lib.optionalAttrs stdenv.isDarwin {
+// lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     postBuild = ''
       # The Wine preloader must _not_ be linked to any system libraries, but `NIX_LDFLAGS` will link
       # to libintl, libiconv, and CoreFoundation no matter what. Delete the one that was built and
@@ -68,12 +68,12 @@ lib.optionalAttrs (buildScript != null) { builder = buildScript; }
     pkg-config
   ]
   ++ lib.optionals supportFlags.mingwSupport (mingwGccs
-    ++ lib.optional stdenv.isDarwin setupHookDarwin);
+    ++ lib.optional stdenv.hostPlatform.isDarwin setupHookDarwin);
 
   buildInputs = toBuildInputs pkgArches (with supportFlags; (pkgs:
   [ pkgs.freetype pkgs.perl pkgs.libunwind ]
-  ++ lib.optional stdenv.isLinux         pkgs.libcap
-  ++ lib.optional stdenv.isDarwin        pkgs.libinotify-kqueue
+  ++ lib.optional stdenv.hostPlatform.isLinux         pkgs.libcap
+  ++ lib.optional stdenv.hostPlatform.isDarwin        pkgs.libinotify-kqueue
   ++ lib.optional cupsSupport            pkgs.cups
   ++ lib.optional gettextSupport         pkgs.gettext
   ++ lib.optional dbusSupport            pkgs.dbus
@@ -92,7 +92,7 @@ lib.optionalAttrs (buildScript != null) { builder = buildScript; }
   ++ lib.optional pulseaudioSupport      pkgs.libpulseaudio
   ++ lib.optional (xineramaSupport && x11Support) pkgs.xorg.libXinerama
   ++ lib.optional udevSupport            pkgs.udev
-  ++ lib.optional vulkanSupport          (if stdenv.isDarwin then moltenvk else pkgs.vulkan-loader)
+  ++ lib.optional vulkanSupport          (if stdenv.hostPlatform.isDarwin then moltenvk else pkgs.vulkan-loader)
   ++ lib.optional sdlSupport             pkgs.SDL2
   ++ lib.optional usbSupport             pkgs.libusb1
   ++ lib.optionals gstreamerSupport      (with pkgs.gst_all_1;
@@ -100,8 +100,8 @@ lib.optionalAttrs (buildScript != null) { builder = buildScript; }
   ++ lib.optionals gtkSupport    [ pkgs.gtk3 pkgs.glib ]
   ++ lib.optionals openclSupport [ pkgs.opencl-headers pkgs.ocl-icd ]
   ++ lib.optionals tlsSupport    [ pkgs.openssl pkgs.gnutls ]
-  ++ lib.optionals (openglSupport && !stdenv.isDarwin) [ pkgs.libGLU pkgs.libGL pkgs.mesa.osmesa pkgs.libdrm ]
-  ++ lib.optionals stdenv.isDarwin darwinFrameworks
+  ++ lib.optionals (openglSupport && !stdenv.hostPlatform.isDarwin) [ pkgs.libGLU pkgs.libGL pkgs.mesa.osmesa pkgs.libdrm ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin darwinFrameworks
   ++ lib.optionals (x11Support) (with pkgs.xorg; [
     libX11 libXcomposite libXcursor libXext libXfixes libXi libXrandr libXrender libXxf86vm
   ])
@@ -115,7 +115,7 @@ lib.optionalAttrs (buildScript != null) { builder = buildScript; }
   configureFlags = prevConfigFlags
     ++ lib.optionals supportFlags.waylandSupport [ "--with-wayland" ]
     ++ lib.optionals supportFlags.vulkanSupport [ "--with-vulkan" ]
-    ++ lib.optionals ((stdenv.isDarwin && !supportFlags.xineramaSupport) || !supportFlags.x11Support) [ "--without-x" ];
+    ++ lib.optionals ((stdenv.hostPlatform.isDarwin && !supportFlags.xineramaSupport) || !supportFlags.x11Support) [ "--without-x" ];
 
   # Wine locates a lot of libraries dynamically through dlopen().  Add
   # them to the RPATH so that the user doesn't have to set them in
diff --git a/pkgs/applications/emulators/wine/default.nix b/pkgs/applications/emulators/wine/default.nix
index 2c73ab48ad71..8c8ebdea5878 100644
--- a/pkgs/applications/emulators/wine/default.nix
+++ b/pkgs/applications/emulators/wine/default.nix
@@ -35,7 +35,7 @@
   vulkanSupport ? false,
   sdlSupport ? false,
   usbSupport ? false,
-  mingwSupport ? stdenv.isDarwin,
+  mingwSupport ? stdenv.hostPlatform.isDarwin,
   waylandSupport ? false,
   x11Support ? false,
   embedInstallers ? false, # The Mono and Gecko MSI installers
diff --git a/pkgs/applications/emulators/wine/staging.nix b/pkgs/applications/emulators/wine/staging.nix
index 4a9bfb6c3204..634964fb7533 100644
--- a/pkgs/applications/emulators/wine/staging.nix
+++ b/pkgs/applications/emulators/wine/staging.nix
@@ -8,7 +8,7 @@ let patch = (callPackage ./sources.nix {}).staging;
 in assert lib.versions.majorMinor wineUnstable.version == lib.versions.majorMinor patch.version;
 
 (wineUnstable.override { wineRelease = "staging"; }).overrideAttrs (self: {
-  buildInputs = build-inputs ([ "perl" "autoconf" "gitMinimal" ] ++ lib.optional stdenv.isLinux "util-linux") self.buildInputs;
+  buildInputs = build-inputs ([ "perl" "autoconf" "gitMinimal" ] ++ lib.optional stdenv.hostPlatform.isLinux "util-linux") self.buildInputs;
   nativeBuildInputs = [ autoconf hexdump perl python3 gitMinimal ] ++ self.nativeBuildInputs;
 
   prePatch = self.prePatch or "" + ''
diff --git a/pkgs/applications/file-managers/lf/default.nix b/pkgs/applications/file-managers/lf/default.nix
index 5e6c09b89c89..9bbe32fd298e 100644
--- a/pkgs/applications/file-managers/lf/default.nix
+++ b/pkgs/applications/file-managers/lf/default.nix
@@ -24,7 +24,7 @@ buildGoModule rec {
 
   # Force the use of the pure-go implementation of the os/user library.
   # Relevant issue: https://github.com/gokcehan/lf/issues/191
-  tags = lib.optionals (!stdenv.isDarwin) [ "osusergo" ];
+  tags = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "osusergo" ];
 
   postInstall = ''
     install -D --mode=444 lf.desktop $out/share/applications/lf.desktop
diff --git a/pkgs/applications/file-managers/mc/default.nix b/pkgs/applications/file-managers/mc/default.nix
index fdc60a309313..1644da02ed2f 100644
--- a/pkgs/applications/file-managers/mc/default.nix
+++ b/pkgs/applications/file-managers/mc/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     slang
     zip
   ] ++ lib.optionals x11Support [ libX11 ]
-    ++ lib.optionals (!stdenv.isDarwin) [ e2fsprogs gpm ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ e2fsprogs gpm ];
 
   enableParallelBuilding = true;
 
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
       --replace /bin/rm ${coreutils}/bin/rm
   '';
 
-  postFixup = lib.optionalString ((!stdenv.isDarwin) && x11Support) ''
+  postFixup = lib.optionalString ((!stdenv.hostPlatform.isDarwin) && x11Support) ''
     # libX11.so is loaded dynamically so autopatch doesn't detect it
     patchelf \
       --add-needed ${libX11}/lib/libX11.so \
diff --git a/pkgs/applications/file-managers/projectable/default.nix b/pkgs/applications/file-managers/projectable/default.nix
index 207ea0d0ba0a..b296e6a7ff1c 100644
--- a/pkgs/applications/file-managers/projectable/default.nix
+++ b/pkgs/applications/file-managers/projectable/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/applications/gis/gmt/default.nix b/pkgs/applications/gis/gmt/default.nix
index 3cc04e374440..092d1cb431d6 100644
--- a/pkgs/applications/gis/gmt/default.nix
+++ b/pkgs/applications/gis/gmt/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ curl gdal netcdf pcre dcw-gmt gshhg-gmt ]
-    ++ (if stdenv.isDarwin then [
+    ++ (if stdenv.hostPlatform.isDarwin then [
       Accelerate
       CoreGraphics
       CoreVideo
diff --git a/pkgs/applications/gis/grass/default.nix b/pkgs/applications/gis/grass/default.nix
index 2e02c1d2da6a..68bbcb46b526 100644
--- a/pkgs/applications/gis/grass/default.nix
+++ b/pkgs/applications/gis/grass/default.nix
@@ -5,7 +5,7 @@
 , makeWrapper
 , wrapGAppsHook3
 
-, withOpenGL ? !stdenv.isDarwin
+, withOpenGL ? !stdenv.hostPlatform.isDarwin
 
 , bison
 , blas
@@ -87,7 +87,7 @@ stdenv.mkDerivation (finalAttrs: {
     zlib
     zstd
   ] ++ lib.optionals withOpenGL [ libGLU ]
-  ++ lib.optionals stdenv.isDarwin [ libiconv ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ]
   ++ lib.optionals stdenv.cc.isClang [ llvmPackages.openmp ];
 
   strictDeps = true;
@@ -117,14 +117,14 @@ stdenv.mkDerivation (finalAttrs: {
     "--without-odbc"
   ] ++ lib.optionals (! withOpenGL) [
     "--without-opengl"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--without-cairo"
     "--without-freetype"
     "--without-x"
   ];
 
   # Otherwise a very confusing "Can't load GDAL library" error
-  makeFlags = lib.optional stdenv.isDarwin "GDAL_DYNAMIC=";
+  makeFlags = lib.optional stdenv.hostPlatform.isDarwin "GDAL_DYNAMIC=";
 
   /* Ensures that the python script run at build time are actually executable;
    * otherwise, patchShebangs ignores them.  */
diff --git a/pkgs/applications/gis/spatialite-gui/default.nix b/pkgs/applications/gis/spatialite-gui/default.nix
index b33818e35486..a8bdedabaa37 100644
--- a/pkgs/applications/gis/spatialite-gui/default.nix
+++ b/pkgs/applications/gis/spatialite-gui/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config ]
-    ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+    ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     curl
@@ -59,11 +59,11 @@ stdenv.mkDerivation rec {
     wxGTK
     xz
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa IOKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa IOKit ];
 
   enableParallelBuilding = true;
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     rm -fr $out/share
   '';
 
diff --git a/pkgs/applications/gis/udig/default.nix b/pkgs/applications/gis/udig/default.nix
index 264445336cd3..04740f55b065 100644
--- a/pkgs/applications/gis/udig/default.nix
+++ b/pkgs/applications/gis/udig/default.nix
@@ -63,6 +63,6 @@ let
     '';
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/applications/gis/whitebox-tools/default.nix b/pkgs/applications/gis/whitebox-tools/default.nix
index df2343d8813e..199595a65838 100644
--- a/pkgs/applications/gis/whitebox-tools/default.nix
+++ b/pkgs/applications/gis/whitebox-tools/default.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
     glib
     gtk3
     openssl
-  ] ++ lib.optional stdenv.isDarwin Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/applications/graphics/ImageMagick/6.x.nix b/pkgs/applications/graphics/ImageMagick/6.x.nix
index dac185e3d3d0..e0834055e716 100644
--- a/pkgs/applications/graphics/ImageMagick/6.x.nix
+++ b/pkgs/applications/graphics/ImageMagick/6.x.nix
@@ -78,7 +78,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional openexrSupport openexr
     ++ lib.optional librsvgSupport librsvg
     ++ lib.optional openjpegSupport openjpeg
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       ApplicationServices
       Foundation
     ];
diff --git a/pkgs/applications/graphics/ImageMagick/default.nix b/pkgs/applications/graphics/ImageMagick/default.nix
index cd998be7019f..27abada54119 100644
--- a/pkgs/applications/graphics/ImageMagick/default.nix
+++ b/pkgs/applications/graphics/ImageMagick/default.nix
@@ -101,7 +101,7 @@ stdenv.mkDerivation (finalAttrs: {
       pango
     ]
     ++ lib.optional openjpegSupport openjpeg
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       ApplicationServices
       Foundation
     ];
diff --git a/pkgs/applications/graphics/antimony/default.nix b/pkgs/applications/graphics/antimony/default.nix
index d39961da9077..b55e6a8a5bb0 100644
--- a/pkgs/applications/graphics/antimony/default.nix
+++ b/pkgs/applications/graphics/antimony/default.nix
@@ -28,7 +28,7 @@ in
        sed -i "s,python3,${python3.executable}," CMakeLists.txt
     '';
 
-    postInstall = lib.optionalString stdenv.isLinux ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
       install -Dm644 $src/deploy/icon.svg $out/share/icons/hicolor/scalable/apps/antimony.svg
       install -Dm644 ${./mimetype.xml} $out/share/mime/packages/antimony.xml
     '';
diff --git a/pkgs/applications/graphics/artem/default.nix b/pkgs/applications/graphics/artem/default.nix
index 8b391f104d83..8f6d27b176a3 100644
--- a/pkgs/applications/graphics/artem/default.nix
+++ b/pkgs/applications/graphics/artem/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/graphics/autotrace/default.nix b/pkgs/applications/graphics/autotrace/default.nix
index 30cf116fed14..82bba3c3fc53 100644
--- a/pkgs/applications/graphics/autotrace/default.nix
+++ b/pkgs/applications/graphics/autotrace/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     imagemagick
     libpng
     pstoedit
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/applications/graphics/azpainter/default.nix b/pkgs/applications/graphics/azpainter/default.nix
index 111e37711ef3..b1493b94ce67 100644
--- a/pkgs/applications/graphics/azpainter/default.nix
+++ b/pkgs/applications/graphics/azpainter/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     freetype fontconfig
     libjpeg libpng libtiff libwebp
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   preBuild = ''
     cd build
diff --git a/pkgs/applications/graphics/c3d/default.nix b/pkgs/applications/graphics/c3d/default.nix
index cce015802302..dac235b9995e 100644
--- a/pkgs/applications/graphics/c3d/default.nix
+++ b/pkgs/applications/graphics/c3d/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ itk ] ++ lib.optional stdenv.isDarwin Cocoa;
+  buildInputs = [ itk ] ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   cmakeFlags = [ "-DCONVERT3D_USE_ITK_REMOTE_MODULES=OFF" ];
 
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ bcdarwin ];
     platforms = platforms.unix;
     license = licenses.gpl3;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     # /build/source/itkextras/OneDimensionalInPlaceAccumulateFilter.txx:312:10: fatal error: xmmintrin.h: No such file or directory
   };
 }
diff --git a/pkgs/applications/graphics/comical/default.nix b/pkgs/applications/graphics/comical/default.nix
index d8e869316619..f25259e5ebf4 100644
--- a/pkgs/applications/graphics/comical/default.nix
+++ b/pkgs/applications/graphics/comical/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     wxGTK32
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
diff --git a/pkgs/applications/graphics/curv/default.nix b/pkgs/applications/graphics/curv/default.nix
index 7113437245a3..f1f66784aa51 100644
--- a/pkgs/applications/graphics/curv/default.nix
+++ b/pkgs/applications/graphics/curv/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     xorg.libXi
     xorg.libXinerama
     xorg.libXrandr
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ilmbase
     llvmPackages.openmp
   ];
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/curv3d/curv";
     license = licenses.asl20;
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ pbsds ];
     mainProgram = "curv";
   };
diff --git a/pkgs/applications/graphics/dia/default.nix b/pkgs/applications/graphics/dia/default.nix
index 534d1f5884b9..9977224dd761 100644
--- a/pkgs/applications/graphics/dia/default.nix
+++ b/pkgs/applications/graphics/dia/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation {
   lib.optionals withDocs [
     libxslt
   ] ++
-  lib.optionals stdenv.isDarwin [
+  lib.optionals stdenv.hostPlatform.isDarwin [
     gtk-mac-integration-gtk3
   ];
 
diff --git a/pkgs/applications/graphics/djview/default.nix b/pkgs/applications/graphics/djview/default.nix
index 3678b9760c81..99af85a12b8d 100644
--- a/pkgs/applications/graphics/djview/default.nix
+++ b/pkgs/applications/graphics/djview/default.nix
@@ -37,7 +37,7 @@ mkDerivation rec {
     qtbase
     xorg.libXt
     libtiff
-  ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.AGL;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.AGL;
 
   preConfigure = ''
     NOCONFIGURE=1 ./autogen.sh
@@ -49,10 +49,10 @@ mkDerivation rec {
     "--with-x"
     "--with-tiff"
     "--disable-nsdejavu" # 2023-11-14: modern browsers have dropped support for NPAPI
-  ] ++ lib.optional stdenv.isDarwin "--enable-mac";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--enable-mac";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Portable DjVu viewer (Qt5) and browser (nsdejavu) plugin";
     mainProgram = "djview";
     homepage = "https://djvu.sourceforge.net/djview4.html";
diff --git a/pkgs/applications/graphics/drawio/default.nix b/pkgs/applications/graphics/drawio/default.nix
index 47ee1ebd43e4..d6b6bb8e9e60 100644
--- a/pkgs/applications/graphics/drawio/default.nix
+++ b/pkgs/applications/graphics/drawio/default.nix
@@ -39,9 +39,9 @@ stdenv.mkDerivation rec {
     makeWrapper
     nodejs
     yarn
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     copyDesktopItems
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     autoSignDarwinBinariesHook
   ];
 
@@ -62,15 +62,15 @@ stdenv.mkDerivation rec {
   buildPhase = ''
     runHook preBuild
 
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp -R ${electron.dist}/Electron.app Electron.app
     chmod -R u+w Electron.app
     export CSC_IDENTITY_AUTO_DISCOVERY=false
     sed -i "/afterSign/d" electron-builder-linux-mac.json
   '' + ''
     yarn --offline run electron-builder --dir \
-      ${lib.optionalString stdenv.isDarwin "--config electron-builder-linux-mac.json"} \
-      -c.electronDist=${if stdenv.isDarwin then "." else electron.dist} \
+      ${lib.optionalString stdenv.hostPlatform.isDarwin "--config electron-builder-linux-mac.json"} \
+      -c.electronDist=${if stdenv.hostPlatform.isDarwin then "." else electron.dist} \
       -c.electronVersion=${electron.version}
 
     runHook postBuild
@@ -79,13 +79,13 @@ stdenv.mkDerivation rec {
   installPhase = ''
     runHook preInstall
 
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv dist/mac*/draw.io.app $out/Applications
 
     # Symlinking `draw.io` doesn't work; seems to look for files in the wrong place.
     makeWrapper $out/Applications/draw.io.app/Contents/MacOS/draw.io $out/bin/drawio
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir -p "$out/share/lib/drawio"
     cp -r dist/*-unpacked/{locales,resources{,.pak}} "$out/share/lib/drawio"
 
diff --git a/pkgs/applications/graphics/drawpile/default.nix b/pkgs/applications/graphics/drawpile/default.nix
index 3bdb37900de0..ad76e0e92b7c 100644
--- a/pkgs/applications/graphics/drawpile/default.nix
+++ b/pkgs/applications/graphics/drawpile/default.nix
@@ -107,7 +107,7 @@ in mkDerivation rec {
     license = lib.licenses.gpl3Plus;
     maintainers = with lib.maintainers; [ fgaz ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   } // lib.optionalAttrs buildServer {
     mainProgram = "drawpile-srv";
   } // lib.optionalAttrs buildClient {
diff --git a/pkgs/applications/graphics/emblem/default.nix b/pkgs/applications/graphics/emblem/default.nix
index 2b249d7e294e..c0f9046fa9c8 100644
--- a/pkgs/applications/graphics/emblem/default.nix
+++ b/pkgs/applications/graphics/emblem/default.nix
@@ -49,11 +49,11 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libadwaita
     libxml2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=incompatible-function-pointer-types"
   ]);
 
diff --git a/pkgs/applications/graphics/emulsion/default.nix b/pkgs/applications/graphics/emulsion/default.nix
index a57a33e11b51..0db2a75721ec 100644
--- a/pkgs/applications/graphics/emulsion/default.nix
+++ b/pkgs/applications/graphics/emulsion/default.nix
@@ -30,7 +30,7 @@ let
     libXrandr
     libXxf86vm
     libxcb
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libxkbcommon
     wayland
   ];
@@ -55,7 +55,7 @@ rustPlatform.buildRustPackage rec {
     python3
   ];
 
-  buildInputs = rpathLibs ++ lib.optionals stdenv.isDarwin [
+  buildInputs = rpathLibs ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreGraphics
     CoreServices
@@ -63,7 +63,7 @@ rustPlatform.buildRustPackage rec {
     OpenGL
   ];
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --set-rpath "${lib.makeLibraryPath rpathLibs}" $out/bin/emulsion
   '';
 
diff --git a/pkgs/applications/graphics/epick/default.nix b/pkgs/applications/graphics/epick/default.nix
index ca93a5f579c9..939232197eeb 100644
--- a/pkgs/applications/graphics/epick/default.nix
+++ b/pkgs/applications/graphics/epick/default.nix
@@ -24,11 +24,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-OQZPOiMTpoWabxHa3TJG8L3zq8WxMeFttw8xggSXsMA=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     expat
     fontconfig
     freetype
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     xorg.libXcursor
     xorg.libXi
     xorg.libXrandr
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
   ];
 
@@ -46,7 +46,7 @@ rustPlatform.buildRustPackage rec {
     install -Dm444 assets/icon.png $out/share/icons/hicolor/48x48/apps/epick.png
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/epick --add-rpath ${lib.makeLibraryPath [ libGL ]}
   '';
 
diff --git a/pkgs/applications/graphics/evilpixie/default.nix b/pkgs/applications/graphics/evilpixie/default.nix
index fb397239849b..9c5c7e81c3a7 100644
--- a/pkgs/applications/graphics/evilpixie/default.nix
+++ b/pkgs/applications/graphics/evilpixie/default.nix
@@ -48,8 +48,8 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = platforms.all;
     # Undefined symbols for architecture x86_64:
     # "_bundle_path", referenced from: App::SetupPaths() in src_app.cpp.o
-    broken = stdenv.isDarwin ||
+    broken = stdenv.hostPlatform.isDarwin ||
     # https://github.com/bcampbell/evilpixie/issues/28
-      stdenv.isAarch64;
+      stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/applications/graphics/f3d/default.nix b/pkgs/applications/graphics/f3d/default.nix
index 5daaf0e10ef1..3ce409516249 100644
--- a/pkgs/applications/graphics/f3d/default.nix
+++ b/pkgs/applications/graphics/f3d/default.nix
@@ -15,7 +15,7 @@
 , opencascade-occt
 , assimp
 , fontconfig
-, withManual ? !stdenv.isDarwin
+, withManual ? !stdenv.hostPlatform.isDarwin
 , withPythonBinding ? false
 }:
 
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     opencascade-occt
     assimp
     fontconfig
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
     OpenGL
   ] ++ lib.optionals withPythonBinding [
diff --git a/pkgs/applications/graphics/feh/default.nix b/pkgs/applications/graphics/feh/default.nix
index 56f4936ceff1..e7d144579afd 100644
--- a/pkgs/applications/graphics/feh/default.nix
+++ b/pkgs/applications/graphics/feh/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
   makeFlags = [
     "PREFIX=${placeholder "out"}"
     "exif=1"
-  ] ++ lib.optional stdenv.isDarwin "verscmp=0"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "verscmp=0"
   ++ lib.optional enableAutoreload "inotify=1";
 
   installTargets = [ "install" ];
diff --git a/pkgs/applications/graphics/fstl/default.nix b/pkgs/applications/graphics/fstl/default.nix
index c3d1f5eb655e..f902776fb58b 100644
--- a/pkgs/applications/graphics/fstl/default.nix
+++ b/pkgs/applications/graphics/fstl/default.nix
@@ -6,7 +6,7 @@ mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     runHook preInstall
 
     mkdir -p $out/Applications
diff --git a/pkgs/applications/graphics/gimp/default.nix b/pkgs/applications/graphics/gimp/default.nix
index 8faf717a147e..5270b708486d 100644
--- a/pkgs/applications/graphics/gimp/default.nix
+++ b/pkgs/applications/graphics/gimp/default.nix
@@ -95,7 +95,7 @@ in stdenv.mkDerivation (finalAttrs: {
     makeWrapper
     gtk-doc
     libxslt
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
@@ -135,11 +135,11 @@ in stdenv.mkDerivation (finalAttrs: {
     glib-networking
     libmypaint
     mypaint-brushes1
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     gtk-mac-integration-gtk2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libgudev
   ] ++ lib.optionals withPython [
     python
@@ -168,7 +168,7 @@ in stdenv.mkDerivation (finalAttrs: {
   doCheck = true;
 
   env = {
-    NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DGDK_OSX_BIG_SUR=16";
+    NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DGDK_OSX_BIG_SUR=16";
 
     # Check if librsvg was built with --disable-pixbuf-loader.
     PKG_CONFIG_GDK_PIXBUF_2_0_GDK_PIXBUF_MODULEDIR = "${librsvg}/${gdk-pixbuf.moduleDir}";
diff --git a/pkgs/applications/graphics/gnome-obfuscate/default.nix b/pkgs/applications/graphics/gnome-obfuscate/default.nix
index 6d0a8a8436f3..db173f58b54e 100644
--- a/pkgs/applications/graphics/gnome-obfuscate/default.nix
+++ b/pkgs/applications/graphics/gnome-obfuscate/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-9lrxK2psdIPGsOC6p8T+3AGPrX6PjrK9mFirdJqBSMM=";
   };
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Set the location to gettext to ensure the nixpkgs one on Darwin instead of the vendored one.
     # The vendored gettext does not build with clang 16.
     GETTEXT_BIN_DIR = "${lib.getBin buildPackages.gettext}/bin";
@@ -63,7 +63,7 @@ stdenv.mkDerivation (finalAttrs: {
     gtk4
     gdk-pixbuf
     libadwaita
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
   ];
 
diff --git a/pkgs/applications/graphics/icon-library/default.nix b/pkgs/applications/graphics/icon-library/default.nix
index 8b2347f43818..2b2c3e19825a 100644
--- a/pkgs/applications/graphics/icon-library/default.nix
+++ b/pkgs/applications/graphics/icon-library/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-nWGTYoSa0/fxnD0Mb2132LkeB1oa/gj/oIXBbI+FDw8=";
   };
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Set the location to gettext to ensure the nixpkgs one on Darwin instead of the vendored one.
     # The vendored gettext does not build with clang 16.
     GETTEXT_BIN_DIR = "${lib.getBin buildPackages.gettext}/bin";
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     gtk4
     gtksourceview5
     libadwaita
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/applications/graphics/imagej/default.nix b/pkgs/applications/graphics/imagej/default.nix
index 2398a61f2134..37fed43765ea 100644
--- a/pkgs/applications/graphics/imagej/default.nix
+++ b/pkgs/applications/graphics/imagej/default.nix
@@ -27,7 +27,7 @@ in stdenv.mkDerivation rec {
   buildInputs = [ glib ];
   dontWrapGApps = true;
 
-  desktopItems = lib.optionals stdenv.isLinux [
+  desktopItems = lib.optionals stdenv.hostPlatform.isLinux [
     (makeDesktopItem {
       name = "ImageJ";
       desktopName = "ImageJ";
@@ -56,7 +56,7 @@ in stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     makeWrapper ${jre}/bin/java $out/bin/imagej \
       ''${gappsWrapperArgs[@]} \
       --add-flags "-jar $out/share/java/ij.jar -ijpath $out/share"
diff --git a/pkgs/applications/graphics/imv/default.nix b/pkgs/applications/graphics/imv/default.nix
index 9c60f309e12a..178bdfcae3fb 100644
--- a/pkgs/applications/graphics/imv/default.nix
+++ b/pkgs/applications/graphics/imv/default.nix
@@ -32,7 +32,7 @@ let
   # default value of withWindowSystem
   withWindowSystem' =
          if withWindowSystem != null then withWindowSystem
-    else if stdenv.isLinux then "all"
+    else if stdenv.hostPlatform.isLinux then "all"
     else "x11";
 
   windowSystems = {
diff --git a/pkgs/applications/graphics/inkscape/default.nix b/pkgs/applications/graphics/inkscape/default.nix
index 81cd91ebb6b0..62f485ff916e 100644
--- a/pkgs/applications/graphics/inkscape/default.nix
+++ b/pkgs/applications/graphics/inkscape/default.nix
@@ -134,7 +134,7 @@ stdenv.mkDerivation rec {
   ] ++ (with perlPackages; [
     perl
     XMLParser
-  ]) ++ lib.optionals stdenv.isDarwin [
+  ]) ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
@@ -168,15 +168,15 @@ stdenv.mkDerivation rec {
     python3Env
     zlib
     libepoxy
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     gspell
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cairo
     gtk-mac-integration
   ];
 
   # Make sure PyXML modules can be found at run-time.
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in $out/lib/inkscape/*.dylib; do
       ln -s $f $out/lib/$(basename $f)
     done
diff --git a/pkgs/applications/graphics/lorien/default.nix b/pkgs/applications/graphics/lorien/default.nix
index 8105e3682b59..1f86c6dd2ed0 100644
--- a/pkgs/applications/graphics/lorien/default.nix
+++ b/pkgs/applications/graphics/lorien/default.nix
@@ -27,8 +27,8 @@
 
 let
   preset =
-    if stdenv.isLinux then "Linux/X11"
-    else if stdenv.isDarwin then "Mac OSX"
+    if stdenv.hostPlatform.isLinux then "Linux/X11"
+    else if stdenv.hostPlatform.isDarwin then "Mac OSX"
     else throw "unsupported platform";
 in
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/graphics/menyoki/default.nix b/pkgs/applications/graphics/menyoki/default.nix
index 8d965fe7b129..e8ae4e7f2555 100644
--- a/pkgs/applications/graphics/menyoki/default.nix
+++ b/pkgs/applications/graphics/menyoki/default.nix
@@ -25,11 +25,11 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-NtXjlGkX8AzSw98xHPymzdnTipMIunyDbpSr4eVowa0=";
 
   nativeBuildInputs = [ installShellFiles ]
-    ++ lib.optional stdenv.isLinux pkg-config;
+    ++ lib.optional stdenv.hostPlatform.isLinux pkg-config;
 
   buildInputs = lib.optional withSixel libsixel
-    ++ lib.optionals stdenv.isLinux (with xorg; [ libX11 libXrandr ])
-    ++ lib.optional stdenv.isDarwin AppKit;
+    ++ lib.optionals stdenv.hostPlatform.isLinux (with xorg; [ libX11 libXrandr ])
+    ++ lib.optional stdenv.hostPlatform.isDarwin AppKit;
 
   buildNoDefaultFeatures = !withSki;
   buildFeatures = lib.optional withSixel "sixel";
diff --git a/pkgs/applications/graphics/oculante/default.nix b/pkgs/applications/graphics/oculante/default.nix
index c6f2b188770c..f2c7aa843dbc 100644
--- a/pkgs/applications/graphics/oculante/default.nix
+++ b/pkgs/applications/graphics/oculante/default.nix
@@ -44,7 +44,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     fontconfig
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libGL
     libX11
     libXcursor
@@ -54,7 +54,7 @@ rustPlatform.buildRustPackage rec {
 
     libxkbcommon
     wayland
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
@@ -71,7 +71,7 @@ rustPlatform.buildRustPackage rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Minimalistic crossplatform image viewer written in Rust";
     homepage = "https://github.com/woelper/oculante";
     changelog = "https://github.com/woelper/oculante/blob/${version}/CHANGELOG.md";
diff --git a/pkgs/applications/graphics/openscad/default.nix b/pkgs/applications/graphics/openscad/default.nix
index 9b29f6ddc94d..26e19eec33f8 100644
--- a/pkgs/applications/graphics/openscad/default.nix
+++ b/pkgs/applications/graphics/openscad/default.nix
@@ -26,7 +26,7 @@
 , mkDerivation
 , qtmacextras
 , qmake
-, spacenavSupport ? stdenv.isLinux, libspnav
+, spacenavSupport ? stdenv.hostPlatform.isLinux, libspnav
 , wayland
 , wayland-protocols
 , wrapGAppsHook3
@@ -66,8 +66,8 @@ mkDerivation rec {
     eigen boost glew opencsg cgal_4 mpfr gmp glib
     harfbuzz lib3mf libzip double-conversion freetype fontconfig
     qtbase qtmultimedia qscintilla cairo
-  ] ++ lib.optionals stdenv.isLinux [ libGLU libGL wayland wayland-protocols qtwayland ]
-    ++ lib.optional stdenv.isDarwin qtmacextras
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libGLU libGL wayland wayland-protocols qtwayland ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin qtmacextras
     ++ lib.optional spacenavSupport libspnav
   ;
 
@@ -88,7 +88,7 @@ mkDerivation rec {
     make objects/parser.cxx
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications
     mv $out/bin/*.app $out/Applications
     rmdir $out/bin || true
diff --git a/pkgs/applications/graphics/ovito/default.nix b/pkgs/applications/graphics/ovito/default.nix
index 3af9566c375f..710460054586 100644
--- a/pkgs/applications/graphics/ovito/default.nix
+++ b/pkgs/applications/graphics/ovito/default.nix
@@ -48,7 +48,7 @@ mkDerivation rec {
     qtbase
     qtsvg
     qttools
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     VideoDecodeAcceleration
   ];
 
@@ -58,6 +58,6 @@ mkDerivation rec {
     homepage = "https://ovito.org";
     license = with licenses;  [ gpl3Only mit ];
     maintainers = with maintainers; [ twhitehead ];
-    broken = stdenv.isDarwin; # clang-11: error: no such file or directory: '$-DOVITO_COPYRIGHT_NOTICE=...
+    broken = stdenv.hostPlatform.isDarwin; # clang-11: error: no such file or directory: '$-DOVITO_COPYRIGHT_NOTICE=...
   };
 }
diff --git a/pkgs/applications/graphics/panotools/default.nix b/pkgs/applications/graphics/panotools/default.nix
index c7e7b7d07f5e..494fd093ac4a 100644
--- a/pkgs/applications/graphics/panotools/default.nix
+++ b/pkgs/applications/graphics/panotools/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     libjpeg
     libpng
     libtiff
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Carbon
   ];
 
diff --git a/pkgs/applications/graphics/qosmic/default.nix b/pkgs/applications/graphics/qosmic/default.nix
index ebee900cf9d6..eab80b018ccc 100644
--- a/pkgs/applications/graphics/qosmic/default.nix
+++ b/pkgs/applications/graphics/qosmic/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace qosmic.pro \
       --replace "/share" "/Applications/qosmic.app/Contents/Resources" \
       --replace "/qosmic/scripts" "/scripts" \
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
     "CONFIG+=link_pkgconfig"
   ];
 
-  preInstall = lib.optionalString stdenv.isDarwin ''
+  preInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv qosmic.app $out/Applications
   '';
diff --git a/pkgs/applications/graphics/qvge/default.nix b/pkgs/applications/graphics/qvge/default.nix
index e7c6def43b91..ef4e17fcce81 100644
--- a/pkgs/applications/graphics/qvge/default.nix
+++ b/pkgs/applications/graphics/qvge/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ wrapQtAppsHook qmake ];
 
-  buildInputs = if stdenv.isDarwin then [ qtsvg ] else [ qtx11extras ];
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ qtsvg ] else [ qtx11extras ];
 
   meta = with lib; {
     description = "Qt Visual Graph Editor";
diff --git a/pkgs/applications/graphics/rawtherapee/default.nix b/pkgs/applications/graphics/rawtherapee/default.nix
index aa7c9c84ac16..deb45b06d19f 100644
--- a/pkgs/applications/graphics/rawtherapee/default.nix
+++ b/pkgs/applications/graphics/rawtherapee/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
     cmake
     pkg-config
     wrapGAppsHook3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     makeWrapper
   ];
 
@@ -88,9 +88,9 @@ stdenv.mkDerivation rec {
     exiv2
     libraw
     libjxl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcanberra-gtk3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gtk-mac-integration
   ];
 
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
     "-DCACHE_NAME_SUFFIX=\"\""
     "-DWITH_SYSTEM_LIBRAW=\"ON\""
     "-DWITH_JXL=\"ON\""
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=${stdenv.hostPlatform.darwinMinVersion}"
   ];
 
@@ -110,7 +110,7 @@ stdenv.mkDerivation rec {
   ];
   env.CXXFLAGS = "-include cstdint"; # needed at least with gcc13 on aarch64-linux
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications/RawTherapee.app $out/bin
     cp -R Release $out/Applications/RawTherapee.app/Contents
     for f in $out/Applications/RawTherapee.app/Contents/MacOS/*; do
diff --git a/pkgs/applications/graphics/rx/default.nix b/pkgs/applications/graphics/rx/default.nix
index 5b7162299952..943f46fab649 100644
--- a/pkgs/applications/graphics/rx/default.nix
+++ b/pkgs/applications/graphics/rx/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ cmake pkg-config makeWrapper ];
 
-  buildInputs = lib.optionals stdenv.isLinux
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux
   (with xorg; [
     # glfw-sys dependencies:
     libX11 libXrandr libXinerama libXcursor libXi libXext
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   # FIXME: GLFW (X11) requires DISPLAY env variable for all tests
   doCheck = false;
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/share/applications
     cp $src/rx.desktop $out/share/applications
     wrapProgram $out/bin/rx --prefix LD_LIBRARY_PATH : ${libGL}/lib
diff --git a/pkgs/applications/graphics/sane/backends/brscan4/default.nix b/pkgs/applications/graphics/sane/backends/brscan4/default.nix
index ece80ef18a5b..f4c516ef5698 100644
--- a/pkgs/applications/graphics/sane/backends/brscan4/default.nix
+++ b/pkgs/applications/graphics/sane/backends/brscan4/default.nix
@@ -2,7 +2,7 @@
 let
   myPatchElf = file: ''
     patchelf --set-interpreter \
-      ${stdenv.cc.libc}/lib/ld-linux${lib.optionalString stdenv.is64bit "-x86-64"}.so.2 \
+      ${stdenv.cc.libc}/lib/ld-linux${lib.optionalString stdenv.hostPlatform.is64bit "-x86-64"}.so.2 \
       ${file}
   '';
 
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     mkdir -p $out/$PATH_TO_BRSCAN4
     cp -rp $PATH_TO_BRSCAN4/* $out/$PATH_TO_BRSCAN4
     mkdir -p $out/lib/sane
-    cp -rp usr/lib${lib.optionalString stdenv.is64bit "64"}/sane/* $out/lib/sane
+    cp -rp usr/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"}/sane/* $out/lib/sane
 
     # Symbolic links were absolute. Fix them so that they point to $out.
     pushd "$out/lib/sane" > /dev/null
diff --git a/pkgs/applications/graphics/sane/backends/brscan5/default.nix b/pkgs/applications/graphics/sane/backends/brscan5/default.nix
index b816eb71d27c..91be20f3abbc 100644
--- a/pkgs/applications/graphics/sane/backends/brscan5/default.nix
+++ b/pkgs/applications/graphics/sane/backends/brscan5/default.nix
@@ -2,7 +2,7 @@
 let
   myPatchElf = file: ''
     patchelf --set-interpreter \
-      ${stdenv.cc.libc}/lib/ld-linux${lib.optionalString stdenv.is64bit "-x86-64"}.so.2 \
+      ${stdenv.cc.libc}/lib/ld-linux${lib.optionalString stdenv.hostPlatform.is64bit "-x86-64"}.so.2 \
       ${file}
   '';
   system = stdenv.hostPlatform.system;
diff --git a/pkgs/applications/graphics/sane/backends/default.nix b/pkgs/applications/graphics/sane/backends/default.nix
index 1581b2f5b7b2..55fbc9a3616a 100644
--- a/pkgs/applications/graphics/sane/backends/default.nix
+++ b/pkgs/applications/graphics/sane/backends/default.nix
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
     libxml2
     poppler
     gawk
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libieee1284
     libv4l
     net-snmp
diff --git a/pkgs/applications/graphics/symbolic-preview/default.nix b/pkgs/applications/graphics/symbolic-preview/default.nix
index 5d8ef439f013..46f654b95600 100644
--- a/pkgs/applications/graphics/symbolic-preview/default.nix
+++ b/pkgs/applications/graphics/symbolic-preview/default.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     platforms = platforms.unix;
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/graphics/synfigstudio/default.nix b/pkgs/applications/graphics/synfigstudio/default.nix
index 3c83be511976..e19da3fa15fe 100644
--- a/pkgs/applications/graphics/synfigstudio/default.nix
+++ b/pkgs/applications/graphics/synfigstudio/default.nix
@@ -99,7 +99,7 @@ let
       fribidi
       openexr
       fftw
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Foundation
     ];
   };
diff --git a/pkgs/applications/graphics/tesseract/tesseract5.nix b/pkgs/applications/graphics/tesseract/tesseract5.nix
index 16899aea978b..a8563a09e4c0 100644
--- a/pkgs/applications/graphics/tesseract/tesseract5.nix
+++ b/pkgs/applications/graphics/tesseract/tesseract5.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     icu
     pango
     opencl-headers
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Accelerate
     CoreGraphics
     CoreVideo
diff --git a/pkgs/applications/graphics/tev/default.nix b/pkgs/applications/graphics/tev/default.nix
index 6ab953020c60..e026db40e8ed 100644
--- a/pkgs/applications/graphics/tev/default.nix
+++ b/pkgs/applications/graphics/tev/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     changelog = "https://github.com/Tom94/tev/releases/tag/v${version}";
     license = licenses.bsd3;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # needs apple frameworks + SDK fix? see #205247
+    broken = stdenv.hostPlatform.isDarwin; # needs apple frameworks + SDK fix? see #205247
     maintainers = [ ];
   };
 }
diff --git a/pkgs/applications/graphics/vengi-tools/default.nix b/pkgs/applications/graphics/vengi-tools/default.nix
index 4470ccfec421..be14ad6c63e9 100644
--- a/pkgs/applications/graphics/vengi-tools/default.nix
+++ b/pkgs/applications/graphics/vengi-tools/default.nix
@@ -67,12 +67,12 @@ stdenv.mkDerivation (finalAttrs: {
     lzfse
     SDL2
     SDL2_mixer
-  ] ++ lib.optional stdenv.isLinux wayland-protocols
-    ++ lib.optionals stdenv.isDarwin [ Carbon CoreServices OpenCL ]
-    ++ lib.optional (!stdenv.isDarwin) opencl-headers;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux wayland-protocols
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon CoreServices OpenCL ]
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) opencl-headers;
 
   cmakeFlags =
-    lib.optional stdenv.isDarwin "-DCORESERVICES_LIB=${CoreServices}";
+    lib.optional stdenv.hostPlatform.isDarwin "-DCORESERVICES_LIB=${CoreServices}";
 
   # error: "The plain signature for target_link_libraries has already been used"
   doCheck = false;
@@ -86,7 +86,7 @@ stdenv.mkDerivation (finalAttrs: {
   # one.
   # This is not needed on darwin, since on that platform data files are saved
   # in *.app/Contents/Resources/ too, and are picked up automatically.
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     for prog in $out/bin/*; do
       wrapProgram "$prog" \
         --set CORE_PATH $out/share/$(basename "$prog")/
@@ -113,6 +113,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = [ licenses.mit licenses.cc-by-sa-30 ];
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/graphics/vimiv-qt/default.nix b/pkgs/applications/graphics/vimiv-qt/default.nix
index 83bbbecdc65b..75a0b88fba4e 100644
--- a/pkgs/applications/graphics/vimiv-qt/default.nix
+++ b/pkgs/applications/graphics/vimiv-qt/default.nix
@@ -21,7 +21,7 @@ python3.pkgs.buildPythonApplication rec {
 
   propagatedBuildInputs = with python3.pkgs; [ pyqt5 py3exiv2 ];
 
-  buildInputs = [ qt5.qtsvg ] ++ lib.optionals stdenv.isLinux [ qt5.qtwayland ];
+  buildInputs = [ qt5.qtsvg ] ++ lib.optionals stdenv.hostPlatform.isLinux [ qt5.qtwayland ];
 
   postInstall = ''
     install -Dm644 misc/vimiv.desktop $out/share/applications/vimiv.desktop
diff --git a/pkgs/applications/graphics/vpv/default.nix b/pkgs/applications/graphics/vpv/default.nix
index 1bbdbd4a35e7..7f80ff24a3ce 100644
--- a/pkgs/applications/graphics/vpv/default.nix
+++ b/pkgs/applications/graphics/vpv/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation (finalAttrs: {
     description = "Image viewer for image processing experts";
     maintainers = [ lib.maintainers.kidanger ];
     license = lib.licenses.gpl3;
-    broken = stdenv.isDarwin; # the CMake expects the SDL2::SDL2main target for darwin
+    broken = stdenv.hostPlatform.isDarwin; # the CMake expects the SDL2::SDL2main target for darwin
     mainProgram = "vpv";
   };
 })
diff --git a/pkgs/applications/graphics/weylus/default.nix b/pkgs/applications/graphics/weylus/default.nix
index 36647a62aef2..61b40006b386 100644
--- a/pkgs/applications/graphics/weylus/default.nix
+++ b/pkgs/applications/graphics/weylus/default.nix
@@ -38,12 +38,12 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     ffmpeg
     x264
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     Carbon
     Cocoa
     VideoToolbox
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     dbus
     libva
     gst_all_1.gst-plugins-base
@@ -67,7 +67,7 @@ rustPlatform.buildRustPackage rec {
     git
     typescript
     makeWrapper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
     autoconf
     libtool
@@ -88,7 +88,7 @@ rustPlatform.buildRustPackage rec {
       gst_all_1.gst-plugins-base
       pipewire
     ];
-  in lib.optionalString stdenv.isLinux ''
+  in lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/weylus --prefix GST_PLUGIN_PATH : ${GST_PLUGIN_PATH}
   '';
 
@@ -97,7 +97,7 @@ rustPlatform.buildRustPackage rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Use your tablet as graphic tablet/touch screen on your computer";
     mainProgram = "weylus";
     homepage = "https://github.com/H-M-H/Weylus";
diff --git a/pkgs/applications/graphics/xournalpp/default.nix b/pkgs/applications/graphics/xournalpp/default.nix
index 3527f96bf5b9..921fef456289 100644
--- a/pkgs/applications/graphics/xournalpp/default.nix
+++ b/pkgs/applications/graphics/xournalpp/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake gettext pkg-config wrapGAppsHook3 ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
     ] ++ [
       glib
diff --git a/pkgs/applications/kde/falkon.nix b/pkgs/applications/kde/falkon.nix
index b24375e75005..85c4d113fb13 100644
--- a/pkgs/applications/kde/falkon.nix
+++ b/pkgs/applications/kde/falkon.nix
@@ -20,7 +20,7 @@ mkDerivation rec {
     libpthreadstubs libxcb libXdmcp
     qtsvg qttools qtwebengine qtx11extras
     kwallet kpurpose karchive kio
-  ] ++ lib.optionals stdenv.isLinux [ qtwayland ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ qtwayland ];
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/applications/misc/1password-gui/default.nix b/pkgs/applications/misc/1password-gui/default.nix
index f95d5d9a94d8..cecb229ce13f 100644
--- a/pkgs/applications/misc/1password-gui/default.nix
+++ b/pkgs/applications/misc/1password-gui/default.nix
@@ -61,7 +61,7 @@ let
 
   meta = {
     # Requires to be installed in "/Application" which is not possible for now (https://github.com/NixOS/nixpkgs/issues/254944)
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Multi-platform password manager";
     homepage = "https://1password.com/";
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
@@ -76,7 +76,7 @@ let
   };
 
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   callPackage ./darwin.nix {
     inherit
       pname
diff --git a/pkgs/applications/misc/1password/default.nix b/pkgs/applications/misc/1password/default.nix
index 9ecc38a9abbb..cbc05d27b878 100644
--- a/pkgs/applications/misc/1password/default.nix
+++ b/pkgs/applications/misc/1password/default.nix
@@ -32,11 +32,11 @@ stdenv.mkDerivation {
     else
       throw "Source for ${pname} is not available for ${system}";
 
-  nativeBuildInputs = [ installShellFiles ] ++ lib.optional stdenv.isLinux autoPatchelfHook;
+  nativeBuildInputs = [ installShellFiles ] ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
 
-  buildInputs = lib.optionals stdenv.isDarwin [ xar cpio ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ xar cpio ];
 
-  unpackPhase = lib.optionalString stdenv.isDarwin ''
+  unpackPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     xar -xf $src
     zcat op.pkg/Payload | cpio -i
   '';
@@ -55,7 +55,7 @@ stdenv.mkDerivation {
       --zsh <($out/bin/${mainProgram} completion zsh)
   '';
 
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   doInstallCheck = true;
 
diff --git a/pkgs/applications/misc/anup/default.nix b/pkgs/applications/misc/anup/default.nix
index 91cf5c9540a5..a72ba17eb6b4 100644
--- a/pkgs/applications/misc/anup/default.nix
+++ b/pkgs/applications/misc/anup/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     sqlite
     xdg-utils
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/applications/misc/audio/sox/default.nix b/pkgs/applications/misc/audio/sox/default.nix
index 44e1f0992ad7..621fca6feb2d 100644
--- a/pkgs/applications/misc/audio/sox/default.nix
+++ b/pkgs/applications/misc/audio/sox/default.nix
@@ -31,7 +31,7 @@
 , enableAMR ? false
 , amrnb
 , amrwb
-, enableLibpulseaudio ? stdenv.isLinux && lib.meta.availableOn stdenv.hostPlatform libpulseaudio
+, enableLibpulseaudio ? stdenv.hostPlatform.isLinux && lib.meta.availableOn stdenv.hostPlatform libpulseaudio
 , libpulseaudio
 }:
 
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
   patches = [ ./0001-musl-rewind-pipe-workaround.patch ];
 
   buildInputs =
-    lib.optional (enableAlsa && stdenv.isLinux) alsa-lib
+    lib.optional (enableAlsa && stdenv.hostPlatform.isLinux) alsa-lib
     ++ lib.optional enableLibao libao
     ++ lib.optional enableLame lame
     ++ lib.optional enableLibmad libmad
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional enableWavpack wavpack
     ++ lib.optionals enableAMR [ amrnb amrwb ]
     ++ lib.optional enableLibpulseaudio libpulseaudio
-    ++ lib.optional stdenv.isDarwin CoreAudio;
+    ++ lib.optional stdenv.hostPlatform.isDarwin CoreAudio;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/applications/misc/bambu-studio/default.nix b/pkgs/applications/misc/bambu-studio/default.nix
index 70812441d348..b1ff6eb0a2f5 100644
--- a/pkgs/applications/misc/bambu-studio/default.nix
+++ b/pkgs/applications/misc/bambu-studio/default.nix
@@ -42,7 +42,7 @@
   webkitgtk,
   wxGTK31,
   xorg,
-  withSystemd ? stdenv.isLinux,
+  withSystemd ? stdenv.hostPlatform.isLinux,
 }:
 let
   opencascade-occt = opencascade-occt_7_6;
diff --git a/pkgs/applications/misc/bb/default.nix b/pkgs/applications/misc/bb/default.nix
index 89a0d75fc2b5..16f4c0bd2d6f 100644
--- a/pkgs/applications/misc/bb/default.nix
+++ b/pkgs/applications/misc/bb/default.nix
@@ -12,14 +12,14 @@ stdenv.mkDerivation rec {
   buildInputs = [
     aalib ncurses libmikmod
     xorg.libXau xorg.libXdmcp xorg.libX11
-  ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.CoreAudio;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.CoreAudio;
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i -e '/^#include <malloc.h>$/d' *.c
   '';
 
   # error: 'regparm' is not valid on this platform
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64)
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
     "-D__STRICT_ANSI__";
 
   meta = with lib; {
diff --git a/pkgs/applications/misc/binocle/default.nix b/pkgs/applications/misc/binocle/default.nix
index 92ccc4112993..da77d6c693df 100644
--- a/pkgs/applications/misc/binocle/default.nix
+++ b/pkgs/applications/misc/binocle/default.nix
@@ -31,11 +31,11 @@ rustPlatform.buildRustPackage rec {
     makeWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit CoreFoundation CoreGraphics CoreVideo Foundation Metal QuartzCore
   ];
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     wrapProgram $out/bin/binocle \
       --suffix LD_LIBRARY_PATH : ${lib.makeLibraryPath (with xorg; [ libX11 libXcursor libXi libXrandr ] ++ [ vulkan-loader ])}
   '';
diff --git a/pkgs/applications/misc/blender/default.nix b/pkgs/applications/misc/blender/default.nix
index 503e739a74bd..369a874896b1 100644
--- a/pkgs/applications/misc/blender/default.nix
+++ b/pkgs/applications/misc/blender/default.nix
@@ -71,22 +71,22 @@
   python3Packages, # must use instead of python3.pkgs, see https://github.com/NixOS/nixpkgs/issues/211340
   rocmPackages, # comes with a significantly larger closure size
   runCommand,
-  spaceNavSupport ? stdenv.isLinux,
+  spaceNavSupport ? stdenv.hostPlatform.isLinux,
   sse2neon,
   stdenv,
   tbb,
   wayland,
   wayland-protocols,
   wayland-scanner,
-  waylandSupport ? stdenv.isLinux,
+  waylandSupport ? stdenv.hostPlatform.isLinux,
   zlib,
   zstd,
 }:
 
 let
-  embreeSupport = (!stdenv.isAarch64 && stdenv.isLinux) || stdenv.isDarwin;
-  openImageDenoiseSupport = (!stdenv.isAarch64 && stdenv.isLinux) || stdenv.isDarwin;
-  openUsdSupport = !stdenv.isDarwin;
+  embreeSupport = (!stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) || stdenv.hostPlatform.isDarwin;
+  openImageDenoiseSupport = (!stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) || stdenv.hostPlatform.isDarwin;
+  openUsdSupport = !stdenv.hostPlatform.isDarwin;
 
   python3 = python3Packages.python;
   pyPkgsOpenusd = python3Packages.openusd.override { withOsl = false; };
@@ -130,10 +130,10 @@ stdenv.mkDerivation (finalAttrs: {
 
   sourceRoot = "source";
 
-  patches = [ ./draco.patch ] ++ lib.optional stdenv.isDarwin ./darwin.patch;
+  patches = [ ./draco.patch ] ++ lib.optional stdenv.hostPlatform.isDarwin ./darwin.patch;
 
   postPatch =
-    (lib.optionalString stdenv.isDarwin ''
+    (lib.optionalString stdenv.hostPlatform.isDarwin ''
       : > build_files/cmake/platform/platform_apple_xcode.cmake
       substituteInPlace source/creator/CMakeLists.txt \
         --replace-fail '${"$"}{LIBDIR}/python' \
@@ -200,7 +200,7 @@ stdenv.mkDerivation (finalAttrs: {
       "-DWITH_GHOST_WAYLAND_DYNLOAD=OFF"
       "-DWITH_GHOST_WAYLAND_LIBDECOR=ON"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-DLIBDIR=/does-not-exist"
       "-DSSE2NEON_INCLUDE_DIR=${sse2neon}/lib"
     ]
@@ -275,7 +275,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional embreeSupport embree
     ++ lib.optional openImageDenoiseSupport (openimagedenoise.override { inherit cudaSupport; })
     ++ (
-      if (!stdenv.isDarwin) then
+      if (!stdenv.hostPlatform.isDarwin) then
         [
           libGL
           libGLU
@@ -328,14 +328,14 @@ stdenv.mkDerivation (finalAttrs: {
 
   blenderExecutable =
     placeholder "out"
-    + (if stdenv.isDarwin then "/Applications/Blender.app/Contents/MacOS/Blender" else "/bin/blender");
+    + (if stdenv.hostPlatform.isDarwin then "/Applications/Blender.app/Contents/MacOS/Blender" else "/bin/blender");
 
   postInstall =
-    lib.optionalString stdenv.isDarwin ''
+    lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir $out/Applications
       mv $out/Blender.app $out/Applications
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       mv $out/share/blender/${lib.versions.majorMinor finalAttrs.version}/python{,-ext}
     ''
     + ''
@@ -355,7 +355,7 @@ stdenv.mkDerivation (finalAttrs: {
         addDriverRunpath "$program"
       done
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       makeWrapper $out/Applications/Blender.app/Contents/MacOS/Blender $out/bin/blender
     '';
 
@@ -377,7 +377,7 @@ stdenv.mkDerivation (finalAttrs: {
         import bpy
         bpy.context.scene.eevee.taa_render_samples = 32
         bpy.context.scene.cycles.samples = 32
-        if ${if (stdenv.isAarch64 && stdenv.isLinux) then "True" else "False"}:
+        if ${if (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) then "True" else "False"}:
             bpy.context.scene.cycles.use_denoising = False
         bpy.context.scene.render.resolution_x = 100
         bpy.context.scene.render.resolution_y = 100
@@ -433,7 +433,7 @@ stdenv.mkDerivation (finalAttrs: {
       "x86_64-linux"
       "aarch64-darwin"
     ];
-    broken = stdenv.isDarwin; # fails due to too-old SDK, using newer SDK fails to compile
+    broken = stdenv.hostPlatform.isDarwin; # fails due to too-old SDK, using newer SDK fails to compile
     maintainers = with lib.maintainers; [
       amarshall
       veprbl
diff --git a/pkgs/applications/misc/boatswain/default.nix b/pkgs/applications/misc/boatswain/default.nix
index 5d2b1540aebe..fc2842ebe52f 100644
--- a/pkgs/applications/misc/boatswain/default.nix
+++ b/pkgs/applications/misc/boatswain/default.nix
@@ -62,6 +62,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     platforms = platforms.unix;
     maintainers = with maintainers; [ _0xMRTT ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/misc/calibre/default.nix b/pkgs/applications/misc/calibre/default.nix
index 10bbeefd03f1..b5e8c469b408 100644
--- a/pkgs/applications/misc/calibre/default.nix
+++ b/pkgs/applications/misc/calibre/default.nix
@@ -224,6 +224,6 @@ stdenv.mkDerivation (finalAttrs: {
               else lib.licenses.gpl3Plus;
     maintainers = with lib.maintainers; [ pSub ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/misc/cardpeek/default.nix b/pkgs/applications/misc/cardpeek/default.nix
index 833ad9202b9f..6122607bc4dc 100644
--- a/pkgs/applications/misc/cardpeek/default.nix
+++ b/pkgs/applications/misc/cardpeek/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
     sha256 = "1ighpl7nvcvwnsd6r5h5n9p95kclwrq99hq7bry7s53yr57l6588";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # replace xcode check and hard-coded PCSC framework path
     substituteInPlace configure.ac \
       --replace 'if test ! -e "/Applications/Xcode.app/"; then' 'if test yes != yes; then' \
@@ -34,8 +34,8 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ pkg-config autoreconfHook ];
   buildInputs = [ glib gtk3 lua5_2 curl readline ]
-    ++ lib.optional stdenv.isDarwin PCSC
-    ++ lib.optional stdenv.isLinux pcsclite;
+    ++ lib.optional stdenv.hostPlatform.isDarwin PCSC
+    ++ lib.optional stdenv.hostPlatform.isLinux pcsclite;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/applications/misc/citations/default.nix b/pkgs/applications/misc/citations/default.nix
index ae3964355a48..178a0e25cbf6 100644
--- a/pkgs/applications/misc/citations/default.nix
+++ b/pkgs/applications/misc/citations/default.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation (finalAttrs: {
     gtksourceview5
     libadwaita
     poppler
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/applications/misc/clipqr/default.nix b/pkgs/applications/misc/clipqr/default.nix
index 18b276f2646f..90d4e0b66b52 100644
--- a/pkgs/applications/misc/clipqr/default.nix
+++ b/pkgs/applications/misc/clipqr/default.nix
@@ -69,7 +69,7 @@ buildGoModule rec {
     license = licenses.mit;
     maintainers = with maintainers; [ MatthieuBarthel ];
     homepage = "https://gitlab.com/imatt-foss/clipqr";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "clipqr";
   };
 }
diff --git a/pkgs/applications/misc/cloak/default.nix b/pkgs/applications/misc/cloak/default.nix
index bf3dd3c4a081..61f307edd555 100644
--- a/pkgs/applications/misc/cloak/default.nix
+++ b/pkgs/applications/misc/cloak/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-m11A5fcJzWoDZglrr2Es1V5ZJNepEkGeIRVhexJ7jws=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     homepage = "https://github.com/evansmurithi/cloak";
diff --git a/pkgs/applications/misc/cobalt/default.nix b/pkgs/applications/misc/cobalt/default.nix
index 82276b73c4d1..a5dd6a8d9ef4 100644
--- a/pkgs/applications/misc/cobalt/default.nix
+++ b/pkgs/applications/misc/cobalt/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-g25Pw3BlRbuaGjsQav6mU9zVyS1mVUKkgKDOILm8R6U=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Static site generator written in Rust";
diff --git a/pkgs/applications/misc/collision/default.nix b/pkgs/applications/misc/collision/default.nix
index 96f19b47968a..392bf98af62f 100644
--- a/pkgs/applications/misc/collision/default.nix
+++ b/pkgs/applications/misc/collision/default.nix
@@ -48,7 +48,7 @@ crystal.buildCrystalPackage rec {
   # Shortly, adding pkg-config to buildInputs along with openssl fixes the issue.
 
   nativeBuildInputs = [ wrapGAppsHook4 pkg-config gobject-introspection ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   buildInputs = [
     libadwaita
diff --git a/pkgs/applications/misc/conceal/default.nix b/pkgs/applications/misc/conceal/default.nix
index 94a4d427e84b..5ce8d147fbbf 100644
--- a/pkgs/applications/misc/conceal/default.nix
+++ b/pkgs/applications/misc/conceal/default.nix
@@ -35,6 +35,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/TD-Sky/conceal";
     license = licenses.mit;
     maintainers = with maintainers; [ jedsek kashw2 ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/misc/coolreader/default.nix b/pkgs/applications/misc/coolreader/default.nix
index d75cdd4843fa..22e9906db561 100644
--- a/pkgs/applications/misc/coolreader/default.nix
+++ b/pkgs/applications/misc/coolreader/default.nix
@@ -17,7 +17,7 @@ mkDerivation rec {
   buildInputs = [ qttools fribidi libunibreak ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/buggins/coolreader";
     description = "Cross platform open source e-book reader";
     mainProgram = "cr3";
diff --git a/pkgs/applications/misc/cotp/default.nix b/pkgs/applications/misc/cotp/default.nix
index 3b8d737dc1ee..e2f5cffdfbad 100644
--- a/pkgs/applications/misc/cotp/default.nix
+++ b/pkgs/applications/misc/cotp/default.nix
@@ -19,8 +19,8 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-o9LRXbx77EXXO7rEmpBrx2nommJgG0ikw1YzdeB0Gug=";
 
-  buildInputs = lib.optionals stdenv.isLinux [ libxcb ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libxcb ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   meta = with lib; {
     homepage = "https://github.com/replydev/cotp";
diff --git a/pkgs/applications/misc/cubiomes-viewer/default.nix b/pkgs/applications/misc/cubiomes-viewer/default.nix
index 0d29b7921a66..f75ddf0c108d 100644
--- a/pkgs/applications/misc/cubiomes-viewer/default.nix
+++ b/pkgs/applications/misc/cubiomes-viewer/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/Cubitect/cubiomes-viewer";
     description = "Graphical Minecraft seed finder and map viewer";
     mainProgram = "cubiomes-viewer";
diff --git a/pkgs/applications/misc/diebahn/default.nix b/pkgs/applications/misc/diebahn/default.nix
index 502c247ce2d2..0212547a75a6 100644
--- a/pkgs/applications/misc/diebahn/default.nix
+++ b/pkgs/applications/misc/diebahn/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     gtk4
     libadwaita
     pango
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreFoundation
     Foundation
     Security
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
 
   # Darwin needs to link against gettext from nixpkgs instead of the one vendored by gettext-sys
   # because the vendored copy does not build with newer versions of clang.
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     GETTEXT_BIN_DIR = "${lib.getBin gettext}/bin";
     GETTEXT_INCLUDE_DIR = "${lib.getDev gettext}/include";
     GETTEXT_LIB_DIR = "${lib.getLib gettext}/lib";
diff --git a/pkgs/applications/misc/diff-pdf/default.nix b/pkgs/applications/misc/diff-pdf/default.nix
index 1d54b57c9b2f..d64d8f6ab9be 100644
--- a/pkgs/applications/misc/diff-pdf/default.nix
+++ b/pkgs/applications/misc/diff-pdf/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoconf automake pkg-config ];
   buildInputs = [ cairo poppler wxGTK ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   preConfigure = "./bootstrap";
 
diff --git a/pkgs/applications/misc/dmenu-rs/default.nix b/pkgs/applications/misc/dmenu-rs/default.nix
index 87d484c2e9bf..4b15eae9e614 100644
--- a/pkgs/applications/misc/dmenu-rs/default.nix
+++ b/pkgs/applications/misc/dmenu-rs/default.nix
@@ -71,6 +71,6 @@ stdenv.mkDerivation rec {
     license = with licenses; [ gpl3Only ];
     maintainers = with maintainers; [ benjaminedwardwebb ];
     platforms = platforms.linux;
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/applications/misc/doctave/default.nix b/pkgs/applications/misc/doctave/default.nix
index 6b54636488e9..8ddbe3a126e1 100644
--- a/pkgs/applications/misc/doctave/default.nix
+++ b/pkgs/applications/misc/doctave/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-keLcNttdM9JUnn3qi/bWkcObIHl3MRACDHKPSZuScOc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/applications/misc/done/default.nix b/pkgs/applications/misc/done/default.nix
index 47238cd9cb9c..095d77b1ee83 100644
--- a/pkgs/applications/misc/done/default.nix
+++ b/pkgs/applications/misc/done/default.nix
@@ -54,11 +54,11 @@ stdenv.mkDerivation rec {
     libsecret
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     GETTEXT_DIR = gettext;
   };
 
diff --git a/pkgs/applications/misc/dupeguru/default.nix b/pkgs/applications/misc/dupeguru/default.nix
index c514c2177369..8ec9dfc35033 100644
--- a/pkgs/applications/misc/dupeguru/default.nix
+++ b/pkgs/applications/misc/dupeguru/default.nix
@@ -60,7 +60,7 @@ python3Packages.buildPythonApplication rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "GUI tool to find duplicate files in a system";
     homepage = "https://github.com/arsenetar/dupeguru";
     license = licenses.bsd3;
diff --git a/pkgs/applications/misc/electron-cash/default.nix b/pkgs/applications/misc/electron-cash/default.nix
index 910e21528eb5..e9854ac3ef94 100644
--- a/pkgs/applications/misc/electron-cash/default.nix
+++ b/pkgs/applications/misc/electron-cash/default.nix
@@ -51,7 +51,7 @@ python3Packages.buildPythonApplication rec {
 
   nativeBuildInputs = [ wrapQtAppsHook ];
 
-  buildInputs = [ ] ++ lib.optional stdenv.isLinux qtwayland;
+  buildInputs = [ ] ++ lib.optional stdenv.hostPlatform.isLinux qtwayland;
 
   postPatch = ''
     substituteInPlace contrib/requirements/requirements.txt \
@@ -61,7 +61,7 @@ python3Packages.buildPythonApplication rec {
       --replace "(share_dir" "(\"share\""
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace $out/share/applications/electron-cash.desktop \
       --replace "Exec=electron-cash" "Exec=$out/bin/electron-cash"
   '';
diff --git a/pkgs/applications/misc/electrum/default.nix b/pkgs/applications/misc/electrum/default.nix
index 859d7bb42b00..0faaf369125d 100644
--- a/pkgs/applications/misc/electrum/default.nix
+++ b/pkgs/applications/misc/electrum/default.nix
@@ -32,13 +32,13 @@ let
   };
 
   libsecp256k1_name =
-    if stdenv.isLinux then "libsecp256k1.so.{v}"
-    else if stdenv.isDarwin then "libsecp256k1.{v}.dylib"
+    if stdenv.hostPlatform.isLinux then "libsecp256k1.so.{v}"
+    else if stdenv.hostPlatform.isDarwin then "libsecp256k1.{v}.dylib"
     else "libsecp256k1${stdenv.hostPlatform.extensions.sharedLibrary}";
 
   libzbar_name =
-    if stdenv.isLinux then "libzbar.so.0"
-    else if stdenv.isDarwin then "libzbar.0.dylib"
+    if stdenv.hostPlatform.isLinux then "libzbar.so.0"
+    else if stdenv.hostPlatform.isDarwin then "libzbar.0.dylib"
     else "libzbar${stdenv.hostPlatform.extensions.sharedLibrary}";
 
   # Not provided in official source releases, which are what upstream signs.
@@ -71,7 +71,7 @@ python.pkgs.buildPythonApplication {
   '';
 
   nativeBuildInputs = lib.optionals enableQt [ wrapQtAppsHook ];
-  buildInputs = lib.optional (stdenv.isLinux && enableQt) qtwayland;
+  buildInputs = lib.optional (stdenv.hostPlatform.isLinux && enableQt) qtwayland;
 
   propagatedBuildInputs = with python.pkgs; [
     aiohttp
@@ -124,7 +124,7 @@ python.pkgs.buildPythonApplication {
     sed -i '/qdarkstyle/d' contrib/requirements/requirements.txt
   '');
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace $out/share/applications/electrum.desktop \
       --replace 'Exec=sh -c "PATH=\"\\$HOME/.local/bin:\\$PATH\"; electrum %u"' \
                 "Exec=$out/bin/electrum %u" \
diff --git a/pkgs/applications/misc/electrum/grs.nix b/pkgs/applications/misc/electrum/grs.nix
index 9d71a5886be6..cd0b89f94f05 100644
--- a/pkgs/applications/misc/electrum/grs.nix
+++ b/pkgs/applications/misc/electrum/grs.nix
@@ -13,13 +13,13 @@ let
   version = "4.5.4";
 
   libsecp256k1_name =
-    if stdenv.isLinux then "libsecp256k1.so.{v}"
-    else if stdenv.isDarwin then "libsecp256k1.{v}.dylib"
+    if stdenv.hostPlatform.isLinux then "libsecp256k1.so.{v}"
+    else if stdenv.hostPlatform.isDarwin then "libsecp256k1.{v}.dylib"
     else "libsecp256k1${stdenv.hostPlatform.extensions.sharedLibrary}";
 
   libzbar_name =
-    if stdenv.isLinux then "libzbar.so.0"
-    else if stdenv.isDarwin then "libzbar.0.dylib"
+    if stdenv.hostPlatform.isLinux then "libzbar.so.0"
+    else if stdenv.hostPlatform.isDarwin then "libzbar.0.dylib"
     else "libzbar${stdenv.hostPlatform.extensions.sharedLibrary}";
 
 in
@@ -36,7 +36,7 @@ python3.pkgs.buildPythonApplication {
   };
 
   nativeBuildInputs = lib.optionals enableQt [ wrapQtAppsHook ];
-  buildInputs = lib.optional (stdenv.isLinux && enableQt) qtwayland;
+  buildInputs = lib.optional (stdenv.hostPlatform.isLinux && enableQt) qtwayland;
 
   propagatedBuildInputs = with python3.pkgs; [
     aiohttp
@@ -90,7 +90,7 @@ python3.pkgs.buildPythonApplication {
     sed -i '/qdarkstyle/d' contrib/requirements/requirements.txt
   '');
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace $out/share/applications/electrum-grs.desktop \
       --replace 'Exec=sh -c "PATH=\"\\$HOME/.local/bin:\\$PATH\"; electrum-grs %u"' \
                 "Exec=$out/bin/electrum-grs %u" \
diff --git a/pkgs/applications/misc/electrum/ltc.nix b/pkgs/applications/misc/electrum/ltc.nix
index 110a17aeeac9..e0aaf139cd65 100644
--- a/pkgs/applications/misc/electrum/ltc.nix
+++ b/pkgs/applications/misc/electrum/ltc.nix
@@ -14,13 +14,13 @@ let
   version = "4.2.2.1";
 
   libsecp256k1_name =
-    if stdenv.isLinux then "libsecp256k1.so.0"
-    else if stdenv.isDarwin then "libsecp256k1.0.dylib"
+    if stdenv.hostPlatform.isLinux then "libsecp256k1.so.0"
+    else if stdenv.hostPlatform.isDarwin then "libsecp256k1.0.dylib"
     else "libsecp256k1${stdenv.hostPlatform.extensions.sharedLibrary}";
 
   libzbar_name =
-    if stdenv.isLinux then "libzbar.so.0"
-    else if stdenv.isDarwin then "libzbar.0.dylib"
+    if stdenv.hostPlatform.isLinux then "libzbar.so.0"
+    else if stdenv.hostPlatform.isDarwin then "libzbar.0.dylib"
     else "libzbar${stdenv.hostPlatform.extensions.sharedLibrary}";
 
   # Not provided in official source releases, which are what upstream signs.
@@ -112,7 +112,7 @@ python3.pkgs.buildPythonApplication {
     sed -i '/qdarkstyle/d' contrib/requirements/requirements.txt
   '');
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     # Despite setting usr_share above, these files are installed under
     # $out/nix ...
     mv $out/${python3.sitePackages}/nix/store"/"*/share $out
@@ -131,7 +131,7 @@ python3.pkgs.buildPythonApplication {
   '';
 
   nativeCheckInputs = with python3.pkgs; [ pytestCheckHook pyaes pycryptodomex ];
-  buildInputs = lib.optional stdenv.isLinux qtwayland;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux qtwayland;
 
   pytestFlagsArray = [ "electrum_ltc/tests" ];
 
diff --git a/pkgs/applications/misc/etesync-dav/default.nix b/pkgs/applications/misc/etesync-dav/default.nix
index 6b68334f20f4..1758dde546ea 100644
--- a/pkgs/applications/misc/etesync-dav/default.nix
+++ b/pkgs/applications/misc/etesync-dav/default.nix
@@ -42,6 +42,6 @@ python3.pkgs.buildPythonApplication {
     mainProgram = "etesync-dav";
     license = licenses.gpl3;
     maintainers = with maintainers; [ thyol valodim ];
-    broken = stdenv.isDarwin; # pyobjc-framework-Cocoa is missing
+    broken = stdenv.hostPlatform.isDarwin; # pyobjc-framework-Cocoa is missing
   };
 }
diff --git a/pkgs/applications/misc/eureka-ideas/default.nix b/pkgs/applications/misc/eureka-ideas/default.nix
index f8f24fa63569..f9a911a1c119 100644
--- a/pkgs/applications/misc/eureka-ideas/default.nix
+++ b/pkgs/applications/misc/eureka-ideas/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libgit2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/applications/misc/faircamp/default.nix b/pkgs/applications/misc/faircamp/default.nix
index 9f8a507fdce4..0f9155fe1b89 100644
--- a/pkgs/applications/misc/faircamp/default.nix
+++ b/pkgs/applications/misc/faircamp/default.nix
@@ -53,7 +53,7 @@ rustPlatform.buildRustPackage rec {
     glib
     libopus
     vips
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/applications/misc/far2l/default.nix b/pkgs/applications/misc/far2l/default.nix
index f35df6a049f2..7508bc53e657 100644
--- a/pkgs/applications/misc/far2l/default.nix
+++ b/pkgs/applications/misc/far2l/default.nix
@@ -31,9 +31,9 @@ stdenv.mkDerivation rec {
     ++ lib.optionals withColorer [ spdlog xercesc ]
     ++ lib.optionals withMultiArc [ libarchive pcre ]
     ++ lib.optionals withNetRocks [ openssl libssh libnfs neon ]
-    ++ lib.optional (withNetRocks && !stdenv.isDarwin) samba # broken on darwin
+    ++ lib.optional (withNetRocks && !stdenv.hostPlatform.isDarwin) samba # broken on darwin
     ++ lib.optionals withPython (with python3Packages; [ python cffi debugpy pcpp ])
-    ++ lib.optionals stdenv.isDarwin [ IOKit Carbon Cocoa AudioToolbox OpenGL System ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit Carbon Cocoa AudioToolbox OpenGL System ];
 
   postPatch = ''
     patchShebangs python/src/prebuild.sh
diff --git a/pkgs/applications/misc/firestarter/default.nix b/pkgs/applications/misc/firestarter/default.nix
index 8eb001e9c93b..55e1700c5c85 100644
--- a/pkgs/applications/misc/firestarter/default.nix
+++ b/pkgs/applications/misc/firestarter/default.nix
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://tu-dresden.de/zih/forschung/projekte/firestarter";
     description = "Processor Stress Test Utility";
     platforms = platforms.linux;
diff --git a/pkgs/applications/misc/flavours/default.nix b/pkgs/applications/misc/flavours/default.nix
index 98146e6bfdf3..c2cb20ef5b74 100644
--- a/pkgs/applications/misc/flavours/default.nix
+++ b/pkgs/applications/misc/flavours/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-SOsHvcfDdUpb0x5VZ1vZJnGaIiWWOPgnAwKYNXzfUfI=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   cargoHash = "sha256-aimPeGIE5jP0pdrqwnzUzBqW0jz9+kcfpLdCN0r30xU=";
 
diff --git a/pkgs/applications/misc/gcal/default.nix b/pkgs/applications/misc/gcal/default.nix
index 8f345f39b534..f07a18c0edae 100644
--- a/pkgs/applications/misc/gcal/default.nix
+++ b/pkgs/applications/misc/gcal/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ ncurses ] ++ lib.optional stdenv.isDarwin gettext;
+  buildInputs = [ ncurses ] ++ lib.optional stdenv.hostPlatform.isDarwin gettext;
 
   meta = {
     description = "Program for calculating and printing calendars";
diff --git a/pkgs/applications/misc/gcalcli/default.nix b/pkgs/applications/misc/gcalcli/default.nix
index da456226b1a7..c9c29cd8e007 100644
--- a/pkgs/applications/misc/gcalcli/default.nix
+++ b/pkgs/applications/misc/gcalcli/default.nix
@@ -27,7 +27,7 @@ python3Packages.buildPythonApplication rec {
         --replace-fail "\"types-requests\"," "" \
         --replace-fail "\"types-vobject\"," ""
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       substituteInPlace gcalcli/argparsers.py \
         --replace-fail "'notify-send" "'${lib.getExe libnotify}"
     '';
diff --git a/pkgs/applications/misc/gcfflasher/default.nix b/pkgs/applications/misc/gcfflasher/default.nix
index b9a49e172329..01a071dc68f4 100644
--- a/pkgs/applications/misc/gcfflasher/default.nix
+++ b/pkgs/applications/misc/gcfflasher/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     cmake
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libgpiod
   ];
 
diff --git a/pkgs/applications/misc/get_iplayer/default.nix b/pkgs/applications/misc/get_iplayer/default.nix
index 4f455d901c2d..c807438aaa43 100644
--- a/pkgs/applications/misc/get_iplayer/default.nix
+++ b/pkgs/applications/misc/get_iplayer/default.nix
@@ -20,7 +20,7 @@ perlPackages.buildPerlPackage rec {
     hash = "sha256-fqzrgmtqy7dlmGEaTXAqpdt9HqZCVooJ0Vf6/JUKihw=";
   };
 
-  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
   buildInputs = [ perl ];
   propagatedBuildInputs = with perlPackages; [
     LWP LWPProtocolHttps XMLLibXML Mojolicious
@@ -40,7 +40,7 @@ perlPackages.buildPerlPackage rec {
     runHook postInstall
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/.get_iplayer-wrapped
   '';
 
diff --git a/pkgs/applications/misc/gimoji/default.nix b/pkgs/applications/misc/gimoji/default.nix
index 71582e3acc39..802c03489b11 100644
--- a/pkgs/applications/misc/gimoji/default.nix
+++ b/pkgs/applications/misc/gimoji/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-pKHhYWEF9L0UX9hc2Ga3WOUWzISA8ONwn3rcI9u2/n0=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
diff --git a/pkgs/applications/misc/girara/default.nix b/pkgs/applications/misc/girara/default.nix
index d33560c4f16a..37f12a266c68 100644
--- a/pkgs/applications/misc/girara/default.nix
+++ b/pkgs/applications/misc/girara/default.nix
@@ -55,11 +55,11 @@ stdenv.mkDerivation rec {
     xvfb-run
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   mesonFlags = [
     "-Ddocs=disabled" # docs do not seem to be installed
-    (lib.mesonEnable "tests" ((stdenv.buildPlatform.canExecute stdenv.hostPlatform) && (!stdenv.isDarwin)))
+    (lib.mesonEnable "tests" ((stdenv.buildPlatform.canExecute stdenv.hostPlatform) && (!stdenv.hostPlatform.isDarwin)))
   ];
 
   checkPhase = ''
diff --git a/pkgs/applications/misc/gkrellm/default.nix b/pkgs/applications/misc/gkrellm/default.nix
index 218110f6d17d..e6d8dfc31f5a 100644
--- a/pkgs/applications/misc/gkrellm/default.nix
+++ b/pkgs/applications/misc/gkrellm/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ copyDesktopItems pkg-config which wrapGAppsHook3 ];
   buildInputs = [ gettext glib gtk2 libX11 libSM libICE ]
-    ++ lib.optionals stdenv.isDarwin [ IOKit ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   hardeningDisable = [ "format" ];
 
diff --git a/pkgs/applications/misc/golden-cheetah-bin/default.nix b/pkgs/applications/misc/golden-cheetah-bin/default.nix
index 3fcd77f8f4b7..c37e7dc72fff 100644
--- a/pkgs/applications/misc/golden-cheetah-bin/default.nix
+++ b/pkgs/applications/misc/golden-cheetah-bin/default.nix
@@ -29,7 +29,7 @@ appimageTools.wrapType2 {
   meta = {
     description = "Performance software for cyclists, runners and triathletes. This version includes the API Tokens for e.g. Strava";
     platforms = lib.platforms.linux;
-    broken = !stdenv.isx86_64;
+    broken = !stdenv.hostPlatform.isx86_64;
     maintainers = with lib.maintainers; [ gador adamcstephens ];
     license = lib.licenses.gpl2Plus;
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
diff --git a/pkgs/applications/misc/goldendict/default.nix b/pkgs/applications/misc/goldendict/default.nix
index 6b1865509b72..9c8edf3c774e 100644
--- a/pkgs/applications/misc/goldendict/default.nix
+++ b/pkgs/applications/misc/goldendict/default.nix
@@ -36,8 +36,8 @@ stdenv.mkDerivation rec {
   buildInputs = [
     qtbase qtsvg qtwebkit qttools
     libvorbis hunspell xz lzo
-  ] ++ lib.optionals stdenv.isLinux [ qtx11extras libXtst ]
-    ++ lib.optionals stdenv.isDarwin [ bzip2 libiconv ]
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ qtx11extras libXtst ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ bzip2 libiconv ]
     ++ lib.optional withCC opencc
     ++ lib.optional withEpwing libeb
     ++ lib.optional withExtraTiff libtiff
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     (lib.optional withZim "CONFIG+=zim_support")
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv GoldenDict.app $out/Applications
   '';
diff --git a/pkgs/applications/misc/gpsbabel/default.nix b/pkgs/applications/misc/gpsbabel/default.nix
index fbacfb6984c6..e1cfb556891a 100644
--- a/pkgs/applications/misc/gpsbabel/default.nix
+++ b/pkgs/applications/misc/gpsbabel/default.nix
@@ -2,7 +2,7 @@
 , qmake, qttools, wrapQtAppsHook
 , libusb1, shapelib, zlib
 , withGUI ? false, qtserialport
-, withMapPreview ? (!stdenv.isDarwin), qtwebengine
+, withMapPreview ? (!stdenv.hostPlatform.isDarwin), qtwebengine
 , withDoc ? false, docbook_xml_dtd_45, docbook_xsl, expat, fop, libxml2, libxslt, perl
 }:
 
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
 
   # Floating point behavior on i686 causes nmea.test failures. Preventing
   # extended precision fixes this problem.
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-ffloat-store";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isi686 "-ffloat-store";
 
   doCheck = true;
 
@@ -69,7 +69,7 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     install -Dm755 gpsbabel -t $out/bin
-  '' + lib.optionalString withGUI (if stdenv.isDarwin then ''
+  '' + lib.optionalString withGUI (if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
     mv gui/GPSBabelFE.app $out/Applications
     install -Dm644 gui/*.qm gui/coretool/*.qm -t $out/Applications/GPSBabelFE.app/Contents/Resources/translations
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
     cp -r html $doc/share/doc/gpsbabel
   '';
 
-  postFixup = lib.optionalString withGUI (if stdenv.isDarwin then ''
+  postFixup = lib.optionalString withGUI (if stdenv.hostPlatform.isDarwin then ''
     wrapQtApp "$out/Applications/GPSBabelFE.app/Contents/MacOS/GPSBabelFE"
   '' else ''
     wrapQtApp "$out/bin/gpsbabelfe"
diff --git a/pkgs/applications/misc/gpxlab/default.nix b/pkgs/applications/misc/gpxlab/default.nix
index 18c31afef6b5..c3002104256c 100644
--- a/pkgs/applications/misc/gpxlab/default.nix
+++ b/pkgs/applications/misc/gpxlab/default.nix
@@ -19,7 +19,7 @@ mkDerivation rec {
     lrelease GPXLab/locale/*.ts
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv GPXLab/GPXLab.app $out/Applications
   '';
diff --git a/pkgs/applications/misc/gpxsee/default.nix b/pkgs/applications/misc/gpxsee/default.nix
index add7ea7a789c..60bc8b579237 100644
--- a/pkgs/applications/misc/gpxsee/default.nix
+++ b/pkgs/applications/misc/gpxsee/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
     lrelease gpxsee.pro
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv GPXSee.app $out/Applications
     mkdir -p $out/bin
@@ -58,7 +58,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   meta = {
-    broken = isQt6 && stdenv.isDarwin;
+    broken = isQt6 && stdenv.hostPlatform.isDarwin;
     changelog = "https://build.opensuse.org/package/view_file/home:tumic:GPXSee/gpxsee/gpxsee.changes";
     description = "GPS log file viewer and analyzer";
     mainProgram = "gpxsee";
diff --git a/pkgs/applications/misc/gsctl/default.nix b/pkgs/applications/misc/gsctl/default.nix
index b2b9c7b67b06..bb30f7d1b632 100644
--- a/pkgs/applications/misc/gsctl/default.nix
+++ b/pkgs/applications/misc/gsctl/default.nix
@@ -31,7 +31,7 @@ buildGoModule rec {
     kubectl
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Giant Swarm command line interface";
diff --git a/pkgs/applications/misc/gv/default.nix b/pkgs/applications/misc/gv/default.nix
index ca12e3bc77a9..b812e5607380 100644
--- a/pkgs/applications/misc/gv/default.nix
+++ b/pkgs/applications/misc/gv/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0q8s43z14vxm41pfa8s5h9kyyzk1fkwjhkiwbf2x70alm6rv6qi1";
   };
 
-  configureFlags = lib.optionals stdenv.isDarwin [
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--enable-SIGCHLD-fallback"
   ];
 
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     Xaw3d
     ghostscriptX
     perl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
diff --git a/pkgs/applications/misc/health/default.nix b/pkgs/applications/misc/health/default.nix
index 8a2972e99a3a..8ff79b36a515 100644
--- a/pkgs/applications/misc/health/default.nix
+++ b/pkgs/applications/misc/health/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     libadwaita
     libsecret
     tracker
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.Foundation
   ];
diff --git a/pkgs/applications/misc/inherd-quake/default.nix b/pkgs/applications/misc/inherd-quake/default.nix
index 4f9c748730e5..c71dae3b27e1 100644
--- a/pkgs/applications/misc/inherd-quake/default.nix
+++ b/pkgs/applications/misc/inherd-quake/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     Security
   ];
diff --git a/pkgs/applications/misc/inlyne/default.nix b/pkgs/applications/misc/inlyne/default.nix
index 661f537d8bef..9f1013604229 100644
--- a/pkgs/applications/misc/inlyne/default.nix
+++ b/pkgs/applications/misc/inlyne/default.nix
@@ -28,11 +28,11 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     installShellFiles
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     fontconfig
     xorg.libXcursor
     xorg.libXi
@@ -41,11 +41,11 @@ rustPlatform.buildRustPackage rec {
     wayland
     libxkbcommon
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.AppKit
   ];
 
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     # time out on darwin
     "--skip=interpreter::tests::centered_image_with_size_align_and_link"
     "--skip=watcher::tests::the_gauntlet"
@@ -58,7 +58,7 @@ rustPlatform.buildRustPackage rec {
       --zsh completions/_inlyne
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/inlyne \
       --add-rpath ${lib.makeLibraryPath [ libGL xorg.libX11 ]}
   '';
diff --git a/pkgs/applications/misc/inochi2d/default.nix b/pkgs/applications/misc/inochi2d/default.nix
index 44a98ee40339..a88c58d38555 100644
--- a/pkgs/applications/misc/inochi2d/default.nix
+++ b/pkgs/applications/misc/inochi2d/default.nix
@@ -45,7 +45,7 @@ in
 
     meta = {
       # darwin has slightly different build steps
-      broken = stdenv.isDarwin;
+      broken = stdenv.hostPlatform.isDarwin;
       changelog = "https://github.com/Inochi2D/inochi-creator/releases/tag/${src.rev}";
       description = "An open source editor for the Inochi2D puppet format";
     };
@@ -73,7 +73,7 @@ in
 
     meta = {
       # darwin has slightly different build steps, aarch fails to build because of some lua related error
-      broken = stdenv.isDarwin || stdenv.isAarch64;
+      broken = stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isAarch64;
       changelog = "https://github.com/Inochi2D/inochi-session/releases/tag/${src.rev}";
       description = "An application that allows streaming with Inochi2D puppets";
     };
diff --git a/pkgs/applications/misc/joplin-desktop/default.nix b/pkgs/applications/misc/joplin-desktop/default.nix
index 6a1a9423b5eb..bd7bcebd0228 100644
--- a/pkgs/applications/misc/joplin-desktop/default.nix
+++ b/pkgs/applications/misc/joplin-desktop/default.nix
@@ -74,6 +74,6 @@ let
     '';
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/applications/misc/jp2a/default.nix b/pkgs/applications/misc/jp2a/default.nix
index 770246876816..f55b435a4b61 100644
--- a/pkgs/applications/misc/jp2a/default.nix
+++ b/pkgs/applications/misc/jp2a/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "bashcompdir=\${out}/share/bash-completion/completions" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://csl.name/jp2a/";
     description = "Small utility that converts JPG images to ASCII";
     license = licenses.gpl2Only;
diff --git a/pkgs/applications/misc/kbt/default.nix b/pkgs/applications/misc/kbt/default.nix
index c59b5e62c433..8a7e91ba3c7d 100644
--- a/pkgs/applications/misc/kbt/default.nix
+++ b/pkgs/applications/misc/kbt/default.nix
@@ -20,13 +20,13 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-6zD9WRPWEt0ubppaMRTOusy0zm3z6SGB/5/kMxcJ/Ag=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libX11
   ];
 
diff --git a/pkgs/applications/misc/keepassxc/default.nix b/pkgs/applications/misc/keepassxc/default.nix
index 8e9035c101d1..914884a9aa2b 100644
--- a/pkgs/applications/misc/keepassxc/default.nix
+++ b/pkgs/applications/misc/keepassxc/default.nix
@@ -54,10 +54,10 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang (toString [
     "-Wno-old-style-cast"
     "-Wno-error"
-    "-D__BIG_ENDIAN__=${if stdenv.isBigEndian then "1" else "0"}"
+    "-D__BIG_ENDIAN__=${if stdenv.hostPlatform.isBigEndian then "1" else "0"}"
   ]);
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-rpath ${libargon2}/lib";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-rpath ${libargon2}/lib";
 
   patches = [
     ./darwin.patch
@@ -69,8 +69,8 @@ stdenv.mkDerivation rec {
     "-DWITH_XC_UPDATECHECK=OFF"
   ]
   ++ (lib.optional (!withKeePassX11) "-DWITH_XC_X11=OFF")
-  ++ (lib.optional (withKeePassFDOSecrets && stdenv.isLinux) "-DWITH_XC_FDOSECRETS=ON")
-  ++ (lib.optional (withKeePassYubiKey && stdenv.isLinux) "-DWITH_XC_YUBIKEY=ON")
+  ++ (lib.optional (withKeePassFDOSecrets && stdenv.hostPlatform.isLinux) "-DWITH_XC_FDOSECRETS=ON")
+  ++ (lib.optional (withKeePassYubiKey && stdenv.hostPlatform.isLinux) "-DWITH_XC_YUBIKEY=ON")
   ++ (lib.optional withKeePassBrowser "-DWITH_XC_BROWSER=ON")
   ++ (lib.optional withKeePassBrowserPasskeys "-DWITH_XC_BROWSER_PASSKEYS=ON")
   ++ (lib.optional withKeePassKeeShare "-DWITH_XC_KEESHARE=ON")
@@ -86,7 +86,7 @@ stdenv.mkDerivation rec {
     export QT_PLUGIN_PATH="${qtbase.bin}/${qtbase.qtPluginPrefix}"
     # testcli, testgui and testkdbx4 are flaky - skip them all
     # testautotype on darwin throws "QWidget: Cannot create a QWidget without QApplication"
-    make test ARGS+="-E 'testcli|testgui${lib.optionalString stdenv.isDarwin "|testautotype|testkdbx4"}' --output-on-failure"
+    make test ARGS+="-E 'testcli|testgui${lib.optionalString stdenv.hostPlatform.isDarwin "|testautotype|testkdbx4"}' --output-on-failure"
 
     runHook postCheck
   '';
@@ -98,12 +98,12 @@ stdenv.mkDerivation rec {
     qttools
     pkg-config
   ]
-  ++ lib.optional (!stdenv.isDarwin) wrapGAppsHook3;
+  ++ lib.optional (!stdenv.hostPlatform.isDarwin) wrapGAppsHook3;
 
   dontWrapGApps = true;
   preFixup = ''
     qtWrapperArgs+=("''${gappsWrapperArgs[@]}")
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     wrapQtApp "$out/Applications/KeePassXC.app/Contents/MacOS/KeePassXC"
   '';
 
@@ -128,9 +128,9 @@ stdenv.mkDerivation rec {
     readline
     zlib
   ]
-  ++ lib.optional (stdenv.isDarwin && withKeePassTouchID) LocalAuthentication
-  ++ lib.optional stdenv.isDarwin qtmacextras
-  ++ lib.optional stdenv.isLinux libusb1
+  ++ lib.optional (stdenv.hostPlatform.isDarwin && withKeePassTouchID) LocalAuthentication
+  ++ lib.optional stdenv.hostPlatform.isDarwin qtmacextras
+  ++ lib.optional stdenv.hostPlatform.isLinux libusb1
   ++ lib.optional withKeePassX11 qtx11extras;
 
   passthru.tests = nixosTests.keepassxc;
diff --git a/pkgs/applications/misc/kemai/default.nix b/pkgs/applications/misc/kemai/default.nix
index 70941045ce36..7ad3afc16ce5 100644
--- a/pkgs/applications/misc/kemai/default.nix
+++ b/pkgs/applications/misc/kemai/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ poelzi ];
     platforms   = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "Kemai";
   };
 }
diff --git a/pkgs/applications/misc/khal/default.nix b/pkgs/applications/misc/khal/default.nix
index 83de3e517d78..32c307af6025 100644
--- a/pkgs/applications/misc/khal/default.nix
+++ b/pkgs/applications/misc/khal/default.nix
@@ -69,7 +69,7 @@ python3.pkgs.buildPythonApplication rec {
     install -Dm755 misc/khal.desktop -t $out/share/applications
   '';
 
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   LC_ALL = "en_US.UTF-8";
 
diff --git a/pkgs/applications/misc/klipper-estimator/default.nix b/pkgs/applications/misc/klipper-estimator/default.nix
index 136ad6115d78..e7a511769a8e 100644
--- a/pkgs/applications/misc/klipper-estimator/default.nix
+++ b/pkgs/applications/misc/klipper-estimator/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ libgit2 Security SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libgit2 Security SystemConfiguration ];
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/applications/misc/kord/default.nix b/pkgs/applications/misc/kord/default.nix
index 65337780469a..4cbd5f38e19a 100644
--- a/pkgs/applications/misc/kord/default.nix
+++ b/pkgs/applications/misc/kord/default.nix
@@ -40,11 +40,11 @@ rustPlatform.buildRustPackage rec {
     })
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ]
-    ++ lib.optionals stdenv.isDarwin [ rustPlatform.bindgenHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ rustPlatform.bindgenHook ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AudioUnit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AudioUnit ];
 
   meta = with lib; {
     description = "Music theory binary and library for Rust";
diff --git a/pkgs/applications/misc/leetcode-cli/default.nix b/pkgs/applications/misc/leetcode-cli/default.nix
index 3cca48b24c61..24d7faf40722 100644
--- a/pkgs/applications/misc/leetcode-cli/default.nix
+++ b/pkgs/applications/misc/leetcode-cli/default.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     dbus
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd leetcode \
diff --git a/pkgs/applications/misc/lenmus/default.nix b/pkgs/applications/misc/lenmus/default.nix
index 7dc018e08714..c7a1ce9f5d2f 100644
--- a/pkgs/applications/misc/lenmus/default.nix
+++ b/pkgs/applications/misc/lenmus/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     makeWrapper
   ];
 
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     wxsqlite3
     fluidsynth
     fontconfig
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
@@ -75,7 +75,7 @@ stdenv.mkDerivation rec {
     "-DMAN_INSTALL_DIR=${placeholder "out"}/share/man"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv $out/lenmus.app $out/Applications
     mv $out/Resources $out/Applications/lenmus.app/Contents
diff --git a/pkgs/applications/misc/llpp/default.nix b/pkgs/applications/misc/llpp/default.nix
index db089796222c..ff5d34e8224a 100644
--- a/pkgs/applications/misc/llpp/default.nix
+++ b/pkgs/applications/misc/llpp/default.nix
@@ -43,8 +43,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ makeWrapper ocaml pkg-config ];
   buildInputs = [ mupdf libX11 freetype zlib gumbo jbig2dec openjpeg libjpeg lcms2 harfbuzz ]
-    ++ lib.optionals stdenv.isLinux [ libGLU libGL ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.OpenGL darwin.apple_sdk.frameworks.Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libGLU libGL ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.OpenGL darwin.apple_sdk.frameworks.Cocoa ];
 
   dontStrip = true;
 
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     install build/llpp $out/bin
     install misc/llpp.inotify $out/bin/llpp.inotify
     install -Dm444 misc/llpp.desktop -t $out/share/applications
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/llpp \
         --prefix PATH ":" "${xclip}/bin"
 
diff --git a/pkgs/applications/misc/mdzk/default.nix b/pkgs/applications/misc/mdzk/default.nix
index e4093295df68..92498cc92612 100644
--- a/pkgs/applications/misc/mdzk/default.nix
+++ b/pkgs/applications/misc/mdzk/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-5zGUBvmf68tCk5jGrNn+ukgYbiKzrlmZvWrYgoJf2zk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Plain text Zettelkasten based on mdBook";
diff --git a/pkgs/applications/misc/mob/default.nix b/pkgs/applications/misc/mob/default.nix
index 8a74624d616a..90c1683edeea 100644
--- a/pkgs/applications/misc/mob/default.nix
+++ b/pkgs/applications/misc/mob/default.nix
@@ -2,7 +2,7 @@
 , buildGoModule
 , fetchFromGitHub
 , stdenv
-, withSpeech ? !stdenv.isDarwin
+, withSpeech ? !stdenv.hostPlatform.isDarwin
 , makeWrapper
 , espeak-ng
 }:
diff --git a/pkgs/applications/misc/mupdf/default.nix b/pkgs/applications/misc/mupdf/default.nix
index b54d9dd86157..0a242d50e3e6 100644
--- a/pkgs/applications/misc/mupdf/default.nix
+++ b/pkgs/applications/misc/mupdf/default.nix
@@ -15,7 +15,7 @@
 , libjpeg
 , darwin
 , gumbo
-, enableX11 ? (!stdenv.isDarwin)
+, enableX11 ? (!stdenv.hostPlatform.isDarwin)
 , libX11
 , libXext
 , libXi
@@ -98,16 +98,16 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ]
     ++ lib.optional (enableGL || enableX11) copyDesktopItems
-    ++ lib.optional (stdenv.isDarwin && (enableGL || enableX11)) desktopToDarwinBundle
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && (enableGL || enableX11)) desktopToDarwinBundle
     ++ lib.optionals (enableCxx || enablePython) [ python3 python3.pkgs.setuptools python3.pkgs.libclang ]
     ++ lib.optionals (enablePython) [ which swig ]
-    ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames xcbuild ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames xcbuild ];
 
   buildInputs = [ freetype harfbuzz openjpeg jbig2dec libjpeg gumbo ]
     ++ lib.optionals enableX11 [ libX11 libXext libXi libXrandr ]
     ++ lib.optionals enableCurl [ curl openssl ]
     ++ lib.optionals enableGL (
-      if stdenv.isDarwin then
+      if stdenv.hostPlatform.isDarwin then
         with darwin.apple_sdk.frameworks; [ GLUT OpenGL ]
       else
         [ freeglut-mupdf libGLU ]
@@ -167,7 +167,7 @@ stdenv.mkDerivation rec {
 
     moveToOutput "bin" "$bin"
     cp ./build/shared-release/libmupdf${stdenv.hostPlatform.extensions.sharedLibrary}* $out/lib
-  '' + (lib.optionalString (stdenv.isDarwin) ''
+  '' + (lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     for exe in $bin/bin/*; do
       install_name_tool -change build/shared-release/libmupdf.dylib $out/lib/libmupdf.dylib "$exe"
     done
@@ -185,7 +185,7 @@ stdenv.mkDerivation rec {
     mkdir -p $out/${python3.sitePackages}/mupdf
     cp build/*/_mupdf.so $out/${python3.sitePackages}
     cp build/*/mupdf.py $out/${python3.sitePackages}/mupdf/__init__.py
-  '' + lib.optionalString (stdenv.isDarwin) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     install_name_tool -add_rpath $out/lib $out/${python3.sitePackages}/_mupdf.so
   ''));
 
diff --git a/pkgs/applications/misc/mysql-workbench/default.nix b/pkgs/applications/misc/mysql-workbench/default.nix
index 5591fa9b4533..01df4df5d1c7 100644
--- a/pkgs/applications/misc/mysql-workbench/default.nix
+++ b/pkgs/applications/misc/mysql-workbench/default.nix
@@ -141,7 +141,7 @@ stdenv.mkDerivation (finalAttrs: {
   env.NIX_CFLAGS_COMPILE = toString ([
     # error: 'OGRErr OGRSpatialReference::importFromWkt(char**)' is deprecated
     "-Wno-error=deprecated-declarations"
-  ] ++ lib.optionals stdenv.isAarch64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
     # error: narrowing conversion of '-1' from 'int' to 'char'
     "-Wno-error=narrowing"
   ] ++ lib.optionals (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "12") [
diff --git a/pkgs/applications/misc/navi/default.nix b/pkgs/applications/misc/navi/default.nix
index 23abf6a3546e..2d634e99dd15 100644
--- a/pkgs/applications/misc/navi/default.nix
+++ b/pkgs/applications/misc/navi/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ makeWrapper ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   postInstall = ''
     wrapProgram $out/bin/navi \
diff --git a/pkgs/applications/misc/notesnook/default.nix b/pkgs/applications/misc/notesnook/default.nix
index 3753da39a02e..8f3cb528722d 100644
--- a/pkgs/applications/misc/notesnook/default.nix
+++ b/pkgs/applications/misc/notesnook/default.nix
@@ -74,6 +74,6 @@ let
     '';
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/applications/misc/obsidian/default.nix b/pkgs/applications/misc/obsidian/default.nix
index 41ddd2cf8d94..e8ffe9f3b877 100644
--- a/pkgs/applications/misc/obsidian/default.nix
+++ b/pkgs/applications/misc/obsidian/default.nix
@@ -23,10 +23,10 @@ let
     maintainers = with maintainers; [ atila conradmearns zaninime qbit kashw2 w-lfchen ];
   };
 
-  filename = if stdenv.isDarwin then "Obsidian-${version}.dmg" else "obsidian-${version}.tar.gz";
+  filename = if stdenv.hostPlatform.isDarwin then "Obsidian-${version}.dmg" else "obsidian-${version}.tar.gz";
   src = fetchurl {
     url = "https://github.com/obsidianmd/obsidian-releases/releases/download/v${version}/${filename}";
-    hash = if stdenv.isDarwin then "sha256-rFXmhlxXlVz5nCrXMmfYGaxe4/wnBRdFxsfiwiIDHgw=" else "sha256-ok1fedN8+OXBisFpVXbKRW2OhE4o9MC9lJmtMMST6V8=";
+    hash = if stdenv.hostPlatform.isDarwin then "sha256-rFXmhlxXlVz5nCrXMmfYGaxe4/wnBRdFxsfiwiIDHgw=" else "sha256-ok1fedN8+OXBisFpVXbKRW2OhE4o9MC9lJmtMMST6V8=";
   };
 
   icon = fetchurl {
@@ -89,4 +89,4 @@ let
     '';
   };
 in
-if stdenv.isDarwin then darwin else linux
+if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/applications/misc/octoprint/default.nix b/pkgs/applications/misc/octoprint/default.nix
index 18369b8827b5..a241a109091e 100644
--- a/pkgs/applications/misc/octoprint/default.nix
+++ b/pkgs/applications/misc/octoprint/default.nix
@@ -181,8 +181,8 @@ let
               class-doc
               pydantic_1
             ]
-            ++ lib.optionals stdenv.isDarwin [ py.pkgs.appdirs ]
-            ++ lib.optionals (!stdenv.isDarwin) [ octoprint-pisupport ];
+            ++ lib.optionals stdenv.hostPlatform.isDarwin [ py.pkgs.appdirs ]
+            ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ octoprint-pisupport ];
 
           nativeCheckInputs = with self; [
             ddt
@@ -241,7 +241,7 @@ let
 
           disabledTests = [
             "test_check_setup" # Why should it be able to call pip?
-          ] ++ lib.optionals stdenv.isDarwin [ "test_set_external_modification" ];
+          ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_set_external_modification" ];
           disabledTestPaths = [
             "tests/test_octoprint_setuptools.py" # fails due to distutils and python3.12
           ];
diff --git a/pkgs/applications/misc/ola/default.nix b/pkgs/applications/misc/ola/default.nix
index 8d4d4df4ef75..b02a63301fee 100644
--- a/pkgs/applications/misc/ola/default.nix
+++ b/pkgs/applications/misc/ola/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Framework for controlling entertainment lighting equipment";
     homepage = "https://www.openlighting.org/ola/";
     maintainers = [ ];
diff --git a/pkgs/applications/misc/openbangla-keyboard/default.nix b/pkgs/applications/misc/openbangla-keyboard/default.nix
index a727bdac62ba..04a9fffcb083 100644
--- a/pkgs/applications/misc/openbangla-keyboard/default.nix
+++ b/pkgs/applications/misc/openbangla-keyboard/default.nix
@@ -86,6 +86,6 @@ stdenv.mkDerivation rec {
     maintainers = with lib.maintainers; [ hqurve ];
     platforms = lib.platforms.linux;
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/misc/openbox-menu/default.nix b/pkgs/applications/misc/openbox-menu/default.nix
index de3fc6cd0acc..7a9fd06cc295 100644
--- a/pkgs/applications/misc/openbox-menu/default.nix
+++ b/pkgs/applications/misc/openbox-menu/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   patches = [ ./000-enable-svg.patch ];
 
   # The strip options are not recognized by Darwin.
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i -e '/strip -s/d' Makefile
   '';
 
diff --git a/pkgs/applications/misc/opencpn/default.nix b/pkgs/applications/misc/opencpn/default.nix
index 380a88e6f2e0..479fe1bcb076 100644
--- a/pkgs/applications/misc/opencpn/default.nix
+++ b/pkgs/applications/misc/opencpn/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-axRI3sssj2Q6IBfIeyvOa494b0EgKFP+lFL/QrGIybQ=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i '/fixup_bundle/d; /NO_DEFAULT_PATH/d' CMakeLists.txt
   '';
 
@@ -65,9 +65,9 @@ stdenv.mkDerivation (finalAttrs: {
     cmake
     pkg-config
     gtest
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     lsb-release
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     DarwinTools
     makeWrapper
   ];
@@ -77,7 +77,7 @@ stdenv.mkDerivation (finalAttrs: {
     curl
     dbus
     flac
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     AppKit
   ] ++ [
     gtk3
@@ -105,7 +105,7 @@ stdenv.mkDerivation (finalAttrs: {
     sqlite
     tinyxml
     wxGTK32
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-utils
     libselinux
     libsepol
@@ -114,7 +114,7 @@ stdenv.mkDerivation (finalAttrs: {
     xorg.libXtst
   ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform elfutils) [
     elfutils
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     lame
   ];
 
@@ -124,7 +124,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DSQUISH_USE_SSE=0"
   ]);
 
-  postInstall = lib.optionals stdenv.isDarwin ''
+  postInstall = lib.optionals stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/OpenCPN.app $out/Applications
     makeWrapper $out/Applications/OpenCPN.app/Contents/MacOS/OpenCPN $out/bin/opencpn
diff --git a/pkgs/applications/misc/oranda/default.nix b/pkgs/applications/misc/oranda/default.nix
index b1326dd592b4..0c5e55efe0ef 100644
--- a/pkgs/applications/misc/oranda/default.nix
+++ b/pkgs/applications/misc/oranda/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     oniguruma
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
   env = {
     RUSTONIG_SYSTEM_LIBONIG = true;
     ORANDA_USE_TAILWIND_BINARY = true;
-  } // lib.optionalAttrs stdenv.isDarwin {
+  } // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # without this, tailwindcss fails with OpenSSL configuration error
     OPENSSL_CONF = "";
   };
diff --git a/pkgs/applications/misc/organicmaps/default.nix b/pkgs/applications/misc/organicmaps/default.nix
index c95ccd139acf..b81f09e1c301 100644
--- a/pkgs/applications/misc/organicmaps/default.nix
+++ b/pkgs/applications/misc/organicmaps/default.nix
@@ -91,7 +91,7 @@ in stdenv.mkDerivation rec {
 
   meta = with lib; {
     # darwin: "invalid application of 'sizeof' to a function type"
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://organicmaps.app/";
     description = "Detailed Offline Maps for Travellers, Tourists, Hikers and Cyclists";
     license = licenses.asl20;
diff --git a/pkgs/applications/misc/p2pool/default.nix b/pkgs/applications/misc/p2pool/default.nix
index 3d537afc1d2b..b8ca97d298ac 100644
--- a/pkgs/applications/misc/p2pool/default.nix
+++ b/pkgs/applications/misc/p2pool/default.nix
@@ -31,11 +31,11 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ libuv zeromq libsodium gss hwloc openssl curl ]
-    ++ lib.optionals stdenv.isDarwin [ Foundation ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   cmakeFlags = ["-DWITH_LTO=OFF"];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
     "-faligned-allocation"
   ]);
 
diff --git a/pkgs/applications/misc/pastel/default.nix b/pkgs/applications/misc/pastel/default.nix
index e48c0bbcab7b..5164e294a89b 100644
--- a/pkgs/applications/misc/pastel/default.nix
+++ b/pkgs/applications/misc/pastel/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-+Cw/aAXkSbYLqc7TGWsMUJNo88v0s1Cq1m4V84j3gXE=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Command-line tool to generate, analyze, convert and manipulate colors";
diff --git a/pkgs/applications/misc/pdfpc/default.nix b/pkgs/applications/misc/pdfpc/default.nix
index 2b6e7a0ed88c..cae71f785978 100644
--- a/pkgs/applications/misc/pdfpc/default.nix
+++ b/pkgs/applications/misc/pdfpc/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  cmakeFlags = lib.optional stdenv.isDarwin (lib.cmakeBool "MOVIES" false);
+  cmakeFlags = lib.optional stdenv.hostPlatform.isDarwin (lib.cmakeBool "MOVIES" false);
 
   meta = with lib; {
     description = "Presenter console with multi-monitor support for PDF files";
diff --git a/pkgs/applications/misc/pgmodeler/default.nix b/pkgs/applications/misc/pgmodeler/default.nix
index 6d91a499803c..35777a0b2563 100644
--- a/pkgs/applications/misc/pgmodeler/default.nix
+++ b/pkgs/applications/misc/pgmodeler/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config qmake wrapQtAppsHook ];
-  qmakeFlags = [ "pgmodeler.pro" "CONFIG+=release" ] ++ lib.optionals stdenv.isDarwin [
+  qmakeFlags = [ "pgmodeler.pro" "CONFIG+=release" ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "PGSQL_INC=${lib.getDev postgresql}/include"
     "PGSQL_LIB=${lib.getLib postgresql}/lib/libpq.dylib"
     "XML_INC=${libxml2.dev}/include/libxml2"
@@ -33,10 +33,10 @@ stdenv.mkDerivation rec {
 
   # todo: libpq would suffice here. Unfortunately this won't work, if one uses only postgresql.lib here.
   buildInputs = [ postgresql qtsvg ]
-    ++ lib.optionals stdenv.isLinux [ qtwayland ]
-    ++ lib.optionals stdenv.isDarwin [ cups libxml2 ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ qtwayland ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cups libxml2 ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/bin
     for item in pgmodeler pgmodeler-{cli,se,ch}
     do
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     done
   '';
 
-  dontWrapQtApps = stdenv.isDarwin;
+  dontWrapQtApps = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Database modeling tool for PostgreSQL";
diff --git a/pkgs/applications/misc/plover/default.nix b/pkgs/applications/misc/plover/default.nix
index 3f4e82d2e4d9..65161d713f29 100644
--- a/pkgs/applications/misc/plover/default.nix
+++ b/pkgs/applications/misc/plover/default.nix
@@ -8,7 +8,7 @@
     version = "4.0.0.dev10";
 
     meta = with lib; {
-      broken = stdenv.isDarwin;
+      broken = stdenv.hostPlatform.isDarwin;
       description = "OpenSteno Plover stenography software";
       maintainers = with maintainers; [ twey kovirobi ];
       license     = licenses.gpl2;
diff --git a/pkgs/applications/misc/pomodoro/default.nix b/pkgs/applications/misc/pomodoro/default.nix
index 77774b5343a5..d9f76a75451b 100644
--- a/pkgs/applications/misc/pomodoro/default.nix
+++ b/pkgs/applications/misc/pomodoro/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   cargoHash = "sha256-6ZhWStZebXSwrej36DXifrsrmR1SWW3PwGUX0hqPwE4=";
-  buildInputs = lib.optionals stdenv.isDarwin [ Foundation ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   meta = with lib; {
     description = "Simple CLI pomodoro timer using desktop notifications written in Rust";
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [ annaaurora ];
     # error: redefinition of module 'ObjectiveC'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "pomodoro";
   };
 }
diff --git a/pkgs/applications/misc/porsmo/default.nix b/pkgs/applications/misc/porsmo/default.nix
index f741ad2d6b48..6d9ed5ee2c98 100644
--- a/pkgs/applications/misc/porsmo/default.nix
+++ b/pkgs/applications/misc/porsmo/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreAudio
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
diff --git a/pkgs/applications/misc/process-viewer/default.nix b/pkgs/applications/misc/process-viewer/default.nix
index ef2b9fec3adb..10f55aced9ea 100644
--- a/pkgs/applications/misc/process-viewer/default.nix
+++ b/pkgs/applications/misc/process-viewer/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ gtk4 ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ gtk4 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Foundation
   ];
 
diff --git a/pkgs/applications/misc/prusa-slicer/default.nix b/pkgs/applications/misc/prusa-slicer/default.nix
index 159b0e0aebc5..ecce3066ed5b 100644
--- a/pkgs/applications/misc/prusa-slicer/default.nix
+++ b/pkgs/applications/misc/prusa-slicer/default.nix
@@ -128,7 +128,7 @@ stdenv.mkDerivation (finalAttrs: {
     catch2
   ] ++ lib.optionals withSystemd [
     systemd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.CoreWLAN
   ];
 
@@ -210,7 +210,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.agpl3Plus;
     maintainers = with maintainers; [ moredread tweber tmarkus ];
     platforms = platforms.unix;
-  } // lib.optionalAttrs (stdenv.isDarwin) {
+  } // lib.optionalAttrs (stdenv.hostPlatform.isDarwin) {
     mainProgram = "PrusaSlicer";
   };
 })
diff --git a/pkgs/applications/misc/pueue/default.nix b/pkgs/applications/misc/pueue/default.nix
index 173323f58975..1eff0355412c 100644
--- a/pkgs/applications/misc/pueue/default.nix
+++ b/pkgs/applications/misc/pueue/default.nix
@@ -23,11 +23,11 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     installShellFiles
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     rustPlatform.bindgenHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Libsystem
     SystemConfiguration
     libiconv
diff --git a/pkgs/applications/misc/pwsafe/default.nix b/pkgs/applications/misc/pwsafe/default.nix
index dc2de8b0cd73..b2856cb7978e 100644
--- a/pkgs/applications/misc/pwsafe/default.nix
+++ b/pkgs/applications/misc/pwsafe/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     openssl
     xercesc
     file
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libXext
     libXi
     libXt
@@ -63,14 +63,14 @@ stdenv.mkDerivation rec {
     libuuid
     libyubikey
     yubikey-personalization
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
   cmakeFlags = [
     "-DNO_GTEST=ON"
     "-DCMAKE_CXX_FLAGS=-I${yubikey-personalization}/include/ykpers-1"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DNO_YUBI=ON"
   ];
 
@@ -91,7 +91,7 @@ stdenv.mkDerivation rec {
     for f in $(grep -Rl /usr/bin/ .) ; do
       substituteInPlace $f --replace /usr/bin/ ""
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/ui/cli/CMakeLists.txt --replace "uuid" ""
   '';
 
diff --git a/pkgs/applications/misc/qMasterPassword/default.nix b/pkgs/applications/misc/qMasterPassword/default.nix
index a28e8d588693..806d1df05fc4 100644
--- a/pkgs/applications/misc/qMasterPassword/default.nix
+++ b/pkgs/applications/misc/qMasterPassword/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   # Upstream install is mostly defunct. It hardcodes target.path and doesn't
   # install anything but the binary.
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     mkdir -p "$out"/{Applications,bin}
     mv qMasterPassword.app "$out"/Applications/
     ln -s ../Applications/qMasterPassword.app/Contents/MacOS/qMasterPassword "$out"/bin/qMasterPassword
diff --git a/pkgs/applications/misc/qcad/default.nix b/pkgs/applications/misc/qcad/default.nix
index b94b8326dca3..6bffbda0a01b 100644
--- a/pkgs/applications/misc/qcad/default.nix
+++ b/pkgs/applications/misc/qcad/default.nix
@@ -57,7 +57,7 @@ mkDerivation rec {
     qtscript
     qtsvg
     qtxmlpatterns
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     qtmacextras
   ];
 
@@ -68,17 +68,17 @@ mkDerivation rec {
     "QMAKE_CXXFLAGS=-std=c++14"
   ];
 
-  qtWrapperArgs = lib.optionals stdenv.isLinux [
+  qtWrapperArgs = lib.optionals stdenv.hostPlatform.isLinux [
     "--prefix LD_LIBRARY_PATH : ${placeholder "out"}/lib"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--prefix DYLD_LIBRARY_PATH : ${placeholder "out"}/lib"
   ];
 
   installPhase = ''
     runHook preInstall
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     install -Dm555 release/qcad-bin $out/bin/qcad
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install -Dm555 release/QCAD.app/Contents/MacOS/QCAD $out/bin/qcad
     mkdir -p $out/lib
   '' + ''
diff --git a/pkgs/applications/misc/qelectrotech/default.nix b/pkgs/applications/misc/qelectrotech/default.nix
index b4d8bd3ab182..705618bd2f01 100644
--- a/pkgs/applications/misc/qelectrotech/default.nix
+++ b/pkgs/applications/misc/qelectrotech/default.nix
@@ -74,6 +74,6 @@ mkDerivation rec {
     license = licenses.gpl2;
     maintainers = with maintainers; [ yvesf ];
     platforms = qtbase.meta.platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/misc/qolibri/default.nix b/pkgs/applications/misc/qolibri/default.nix
index 0439e212d112..4b8213d46d60 100644
--- a/pkgs/applications/misc/qolibri/default.nix
+++ b/pkgs/applications/misc/qolibri/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation {
     license = licenses.gpl2;
     maintainers = with maintainers; [ azahi ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin && stdenv.isx86_64; # Looks like a libcxx version mismatch problem.
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64; # Looks like a libcxx version mismatch problem.
     mainProgram = "qolibri";
   };
 }
diff --git a/pkgs/applications/misc/qsyncthingtray/default.nix b/pkgs/applications/misc/qsyncthingtray/default.nix
index 2fa22cf73221..68baf5e08ebb 100644
--- a/pkgs/applications/misc/qsyncthingtray/default.nix
+++ b/pkgs/applications/misc/qsyncthingtray/default.nix
@@ -31,13 +31,13 @@ mkDerivation rec {
   }) ] ++ lib.optional (!preferQWebView && !preferNative) ./qsyncthingtray-0.5.8-qt-5.6.3.patch;
 
   postPatch = ''
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       substituteInPlace includes/platforms/linux/posixUtils.hpp \
         --replace '"/usr/local/bin/syncthing"'         '"${syncthing}/bin/syncthing"' \
         --replace '"pgrep -x'                          '"${procps}/bin/pgrep -x'
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace includes/platforms/darwin/macUtils.hpp \
         --replace '"/usr/local/bin/syncthing"'         '"${syncthing}/bin/syncthing"'
     ''}
@@ -64,6 +64,6 @@ mkDerivation rec {
     license = licenses.lgpl3;
     maintainers = with maintainers; [ zraexy peterhoeg ];
     platforms = platforms.all;
-    broken = !preferNative || stdenv.isDarwin;
+    broken = !preferNative || stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/misc/reddsaver/default.nix b/pkgs/applications/misc/reddsaver/default.nix
index b737716ed5d3..c544dc44888f 100644
--- a/pkgs/applications/misc/reddsaver/default.nix
+++ b/pkgs/applications/misc/reddsaver/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # package does not contain tests as of v0.3.3
   docCheck = false;
diff --git a/pkgs/applications/misc/redshift/default.nix b/pkgs/applications/misc/redshift/default.nix
index 41a21e8f49ed..6451fa2c7acf 100644
--- a/pkgs/applications/misc/redshift/default.nix
+++ b/pkgs/applications/misc/redshift/default.nix
@@ -3,15 +3,15 @@
 , libtool, pkg-config, wrapGAppsHook3, wrapPython, gobject-introspection, wayland-scanner
 , gtk3, python, pygobject3, pyxdg
 
-, withQuartz ? stdenv.isDarwin, ApplicationServices
-, withRandr ? stdenv.isLinux, libxcb
-, withDrm ? stdenv.isLinux, libdrm
-, withVidmode ? stdenv.isLinux, libXxf86vm
+, withQuartz ? stdenv.hostPlatform.isDarwin, ApplicationServices
+, withRandr ? stdenv.hostPlatform.isLinux, libxcb
+, withDrm ? stdenv.hostPlatform.isLinux, libdrm
+, withVidmode ? stdenv.hostPlatform.isLinux, libXxf86vm
 
 , withGeolocation ? true
-, withCoreLocation ? withGeolocation && stdenv.isDarwin, CoreLocation, Foundation, Cocoa
-, withGeoclue ? withGeolocation && stdenv.isLinux, geoclue
-, withAppIndicator ? stdenv.isLinux, libappindicator, libayatana-appindicator
+, withCoreLocation ? withGeolocation && stdenv.hostPlatform.isDarwin, CoreLocation, Foundation, Cocoa
+, withGeoclue ? withGeolocation && stdenv.hostPlatform.isLinux, geoclue
+, withAppIndicator ? stdenv.hostPlatform.isLinux, libappindicator, libayatana-appindicator
 }:
 
 let
diff --git a/pkgs/applications/misc/rtfm/default.nix b/pkgs/applications/misc/rtfm/default.nix
index 53ad4f9aea9e..655dd90fdb34 100644
--- a/pkgs/applications/misc/rtfm/default.nix
+++ b/pkgs/applications/misc/rtfm/default.nix
@@ -52,7 +52,7 @@ crystal.buildCrystalPackage rec {
   nativeBuildInputs = [
     wrapGAppsHook4
     gobject-introspection
-  ] ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   buildInputs = [
     webkitgtk_6_0
diff --git a/pkgs/applications/misc/rust-traverse/default.nix b/pkgs/applications/misc/rust-traverse/default.nix
index 7d0e072ee36b..ffe101847105 100644
--- a/pkgs/applications/misc/rust-traverse/default.nix
+++ b/pkgs/applications/misc/rust-traverse/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     bzip2
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Foundation
   ];
 
diff --git a/pkgs/applications/misc/safecloset/default.nix b/pkgs/applications/misc/safecloset/default.nix
index ce774e5a668f..d173777bc3bc 100644
--- a/pkgs/applications/misc/safecloset/default.nix
+++ b/pkgs/applications/misc/safecloset/default.nix
@@ -19,9 +19,9 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-rxNp9dOvy/UTx6Q9pzZGccEKmIiWxzWVYyMxb+h5bqw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libxcb
   ];
 
diff --git a/pkgs/applications/misc/sampler/default.nix b/pkgs/applications/misc/sampler/default.nix
index a111142bbde4..7ee3d4573d9a 100644
--- a/pkgs/applications/misc/sampler/default.nix
+++ b/pkgs/applications/misc/sampler/default.nix
@@ -25,8 +25,8 @@ buildGoModule rec {
 
   subPackages = [ "." ];
 
-  buildInputs = lib.optional stdenv.isLinux alsa-lib
-    ++ lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux alsa-lib
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.OpenAL
   ];
 
diff --git a/pkgs/applications/misc/senv/default.nix b/pkgs/applications/misc/senv/default.nix
index b542966e828a..999b140c5fe2 100644
--- a/pkgs/applications/misc/senv/default.nix
+++ b/pkgs/applications/misc/senv/default.nix
@@ -20,7 +20,7 @@ buildGoModule rec {
     homepage = "https://github.com/SpectralOps/senv";
     license = licenses.mit;
     maintainers = with maintainers; [ SuperSandro2000 ];
-    broken = stdenv.isDarwin; # needs golang.org/x/sys bump
+    broken = stdenv.hostPlatform.isDarwin; # needs golang.org/x/sys bump
     mainProgram = "senv";
   };
 }
diff --git a/pkgs/applications/misc/sigal/default.nix b/pkgs/applications/misc/sigal/default.nix
index 1e82fce07898..d9b4c4cfd53b 100644
--- a/pkgs/applications/misc/sigal/default.nix
+++ b/pkgs/applications/misc/sigal/default.nix
@@ -41,7 +41,7 @@ python3.pkgs.buildPythonApplication rec {
     pytestCheckHook
   ]);
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "test_nonmedia_files"
   ];
 
diff --git a/pkgs/applications/misc/sioyek/default.nix b/pkgs/applications/misc/sioyek/default.nix
index ab853d4dc1f4..64faccf6811c 100644
--- a/pkgs/applications/misc/sioyek/default.nix
+++ b/pkgs/applications/misc/sioyek/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
     qt3d
     qtbase
   ]
-  ++ lib.optionals stdenv.isDarwin [ freetype ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ freetype ];
 
   nativeBuildInputs = [
     installShellFiles
@@ -54,7 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
     wrapQtAppsHook
   ];
 
-  qmakeFlags = lib.optionals stdenv.isDarwin [ "CONFIG+=non_portable" ];
+  qmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "CONFIG+=non_portable" ];
 
   postPatch = ''
     substituteInPlace pdf_viewer_build_config.pro \
@@ -65,7 +65,7 @@ stdenv.mkDerivation (finalAttrs: {
       --replace "/etc/sioyek" "$out/etc"
   '';
 
-  postInstall = if stdenv.isDarwin then ''
+  postInstall = if stdenv.hostPlatform.isDarwin then ''
     cp -r pdf_viewer/shaders sioyek.app/Contents/MacOS/shaders
     cp pdf_viewer/prefs.config sioyek.app/Contents/MacOS/
     cp pdf_viewer/prefs_user.config sioyek.app/Contents/MacOS/
diff --git a/pkgs/applications/misc/slippy/default.nix b/pkgs/applications/misc/slippy/default.nix
index cf5cd1ff0b3d..a7e6a75a7a7e 100644
--- a/pkgs/applications/misc/slippy/default.nix
+++ b/pkgs/applications/misc/slippy/default.nix
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/misc/snagboot/default.nix b/pkgs/applications/misc/snagboot/default.nix
index 11f49d8506b5..3a663443513c 100644
--- a/pkgs/applications/misc/snagboot/default.nix
+++ b/pkgs/applications/misc/snagboot/default.nix
@@ -39,7 +39,7 @@ python3.pkgs.buildPythonApplication rec {
     tftpy
   ];
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     rules="src/snagrecover/50-snagboot.rules"
     if [ ! -f "$rules" ]; then
         echo "$rules is missing, must update the Nix file."
diff --git a/pkgs/applications/misc/stork/default.nix b/pkgs/applications/misc/stork/default.nix
index 0de395549bdd..4441508e0be8 100644
--- a/pkgs/applications/misc/stork/default.nix
+++ b/pkgs/applications/misc/stork/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Impossibly fast web search, made for static sites";
diff --git a/pkgs/applications/misc/stw/default.nix b/pkgs/applications/misc/stw/default.nix
index 689fc9e81ce7..5f36e1e1126c 100644
--- a/pkgs/applications/misc/stw/default.nix
+++ b/pkgs/applications/misc/stw/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ somasis ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "stw";
   };
 }
diff --git a/pkgs/applications/misc/survex/default.nix b/pkgs/applications/misc/survex/default.nix
index 2bb4184b4353..bfb79fd10b93 100644
--- a/pkgs/applications/misc/survex/default.nix
+++ b/pkgs/applications/misc/survex/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
   '';
 
   enableParallelBuilding = true;
-  doCheck = (!stdenv.isDarwin); # times out
+  doCheck = (!stdenv.hostPlatform.isDarwin); # times out
   enableParallelChecking = false;
 
   meta = with lib; {
diff --git a/pkgs/applications/misc/syncthingtray/default.nix b/pkgs/applications/misc/syncthingtray/default.nix
index a993a57deb40..3d0cbe7198c2 100644
--- a/pkgs/applications/misc/syncthingtray/default.nix
+++ b/pkgs/applications/misc/syncthingtray/default.nix
@@ -22,9 +22,9 @@
 , xdg-utils
 , webviewSupport ? true
 , jsSupport ? true
-, kioPluginSupport ? stdenv.isLinux
-, plasmoidSupport  ? stdenv.isLinux
-, systemdSupport ? stdenv.isLinux
+, kioPluginSupport ? stdenv.hostPlatform.isLinux
+, plasmoidSupport  ? stdenv.hostPlatform.isLinux
+, systemdSupport ? stdenv.hostPlatform.isLinux
 /* It is possible to set via this option an absolute exec path that will be
 written to the `~/.config/autostart/syncthingtray.desktop` file generated
 during runtime. Alternatively, one can edit the desktop file themselves after
@@ -52,8 +52,8 @@ stdenv.mkDerivation (finalAttrs: {
     qtutilities
     boost
     qtforkawesome
-  ] ++ lib.optionals stdenv.isDarwin [ iconv ]
-    ++ lib.optionals stdenv.isLinux [ qtwayland ]
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ iconv ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ qtwayland ]
     ++ lib.optionals webviewSupport [ qtwebengine ]
     ++ lib.optionals jsSupport [ qtdeclarative ]
     ++ lib.optionals kioPluginSupport [ kio ]
@@ -74,12 +74,12 @@ stdenv.mkDerivation (finalAttrs: {
   ;
 
   # syncthing server seems to hang on darwin, causing tests to fail.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   preCheck = ''
     export QT_QPA_PLATFORM=offscreen
     export QT_PLUGIN_PATH="${lib.getBin qtbase}/${qtbase.qtPluginPrefix}"
   '';
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # put the app bundle into the proper place /Applications instead of /bin
     mkdir -p $out/Applications
     mv $out/bin/syncthingtray.app $out/Applications
diff --git a/pkgs/applications/misc/synergy/default.nix b/pkgs/applications/misc/synergy/default.nix
index fe15ce3b98b0..7db338b16897 100644
--- a/pkgs/applications/misc/synergy/default.nix
+++ b/pkgs/applications/misc/synergy/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   postPatch = ''
     substituteInPlace src/gui/src/SslCertificate.cpp \
       --replace 'kUnixOpenSslCommand[] = "openssl";' 'kUnixOpenSslCommand[] = "${openssl}/bin/openssl";'
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace src/lib/synergy/unix/AppUtilUnix.cpp \
       --replace "/usr/share/X11/xkb/rules/evdev.xml" "${xkeyboardconfig}/share/X11/xkb/rules/evdev.xml"
   '';
@@ -69,14 +69,14 @@ stdenv.mkDerivation rec {
     qttools # Used for translations even when not building the GUI
     openssl
     pcre
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     Carbon
     Cocoa
     CoreServices
     ScreenSaver
     UserNotifications
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     util-linux
     libselinux
     libsepol
@@ -95,17 +95,17 @@ stdenv.mkDerivation rec {
   ];
 
   # Silences many warnings
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-inconsistent-missing-override";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-inconsistent-missing-override";
 
   cmakeFlags = lib.optional (!withGUI) "-DSYNERGY_BUILD_LEGACY_GUI=OFF"
     # NSFilenamesPboardType is deprecated in 10.14+
-    ++ lib.optional stdenv.isDarwin "-DCMAKE_OSX_DEPLOYMENT_TARGET=${if stdenv.isAarch64 then "10.13" else stdenv.hostPlatform.darwinSdkVersion}";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-DCMAKE_OSX_DEPLOYMENT_TARGET=${if stdenv.hostPlatform.isAarch64 then "10.13" else stdenv.hostPlatform.darwinSdkVersion}";
 
   doCheck = true;
 
   checkPhase = ''
     runHook preCheck
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # filter out tests failing with sandboxing on darwin
     export GTEST_FILTER=-ServerConfigTests.serverconfig_will_deem_equal_configs_with_same_cell_names:NetworkAddress.hostname_valid_parsing
   '' + ''
@@ -120,12 +120,12 @@ stdenv.mkDerivation rec {
     cp bin/{synergyc,synergys,synergyd,syntool} $out/bin/
   '' + lib.optionalString withGUI ''
     cp bin/synergy $out/bin/
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/share/{applications,icons/hicolor/scalable/apps}
     cp ../res/synergy.svg $out/share/icons/hicolor/scalable/apps/
     substitute ../res/synergy.desktop $out/share/applications/synergy.desktop \
       --replace "/usr/bin" "$out/bin"
-  '' + lib.optionalString (stdenv.isDarwin && withGUI) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && withGUI) ''
     mkdir -p $out/Applications
     cp -r bundle/Synergy.app $out/Applications
     ln -s $out/bin $out/Applications/Synergy.app/Contents/MacOS
diff --git a/pkgs/applications/misc/taizen/default.nix b/pkgs/applications/misc/taizen/default.nix
index 903de3c05c1d..30bb445089f5 100644
--- a/pkgs/applications/misc/taizen/default.nix
+++ b/pkgs/applications/misc/taizen/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     ncurses
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/misc/terminal-typeracer/default.nix b/pkgs/applications/misc/terminal-typeracer/default.nix
index 80ece5bded7a..ec2cda0c164c 100644
--- a/pkgs/applications/misc/terminal-typeracer/default.nix
+++ b/pkgs/applications/misc/terminal-typeracer/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ libgit2 openssl sqlite ] ++ lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = [ libgit2 openssl sqlite ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   OPENSSL_NO_VENDOR = 1;
   LIBGIT2_NO_VENDOR = 1;
diff --git a/pkgs/applications/misc/tickrs/default.nix b/pkgs/applications/misc/tickrs/default.nix
index f2cc437ab9b6..4e789f2f8ec7 100644
--- a/pkgs/applications/misc/tickrs/default.nix
+++ b/pkgs/applications/misc/tickrs/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/applications/misc/translatelocally/default.nix b/pkgs/applications/misc/translatelocally/default.nix
index 2749a7ec1566..d99579a5f2a6 100644
--- a/pkgs/applications/misc/translatelocally/default.nix
+++ b/pkgs/applications/misc/translatelocally/default.nix
@@ -28,7 +28,7 @@ in stdenv.mkDerivation (finalAttrs: {
   '';
 
   # https://github.com/XapaJIaMnu/translateLocally/blob/81ed8b9/.github/workflows/build.yml#L330
-  postConfigure = lib.optionalString stdenv.isAarch64 ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isAarch64 ''
     bash ../cmake/fix_ruy_build.sh .. .
   '';
 
diff --git a/pkgs/applications/misc/tthsum/default.nix b/pkgs/applications/misc/tthsum/default.nix
index 603ddeca4fd7..e2b9d2e57041 100644
--- a/pkgs/applications/misc/tthsum/default.nix
+++ b/pkgs/applications/misc/tthsum/default.nix
@@ -15,10 +15,10 @@ stdenv.mkDerivation rec {
     cp obj-unix/tthsum $out/bin
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Md5sum-alike program that works with Tiger/THEX hashes";
     longDescription = ''
       tthsum generates or checks TTH checksums (root of the THEX hash
diff --git a/pkgs/applications/misc/tui-journal/default.nix b/pkgs/applications/misc/tui-journal/default.nix
index 499cf576c314..a4305dbd1769 100644
--- a/pkgs/applications/misc/tui-journal/default.nix
+++ b/pkgs/applications/misc/tui-journal/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/applications/misc/ubpm/default.nix b/pkgs/applications/misc/ubpm/default.nix
index f2c0a9aa02e8..883850f10b13 100644
--- a/pkgs/applications/misc/ubpm/default.nix
+++ b/pkgs/applications/misc/ubpm/default.nix
@@ -43,6 +43,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "ubpm";
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ kurnevsky ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/misc/udict/default.nix b/pkgs/applications/misc/udict/default.nix
index 24424c1017db..42f2585ec439 100644
--- a/pkgs/applications/misc/udict/default.nix
+++ b/pkgs/applications/misc/udict/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/applications/misc/usb-reset/default.nix b/pkgs/applications/misc/usb-reset/default.nix
index 0e924ba5ee67..a5bb2061ed50 100644
--- a/pkgs/applications/misc/usb-reset/default.nix
+++ b/pkgs/applications/misc/usb-reset/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Perform a bus reset on a USB device using its vendor and product ID";
     homepage = "https://github.com/ralight/usb-reset";
     changelog = "https://github.com/ralight/usb-reset/blob/master/ChangeLog.txt";
diff --git a/pkgs/applications/misc/vhs/default.nix b/pkgs/applications/misc/vhs/default.nix
index 368a8163657b..12e14f212f7d 100644
--- a/pkgs/applications/misc/vhs/default.nix
+++ b/pkgs/applications/misc/vhs/default.nix
@@ -18,7 +18,7 @@ buildGoModule rec {
   ldflags = [ "-s" "-w" "-X=main.Version=${version}" ];
 
   postInstall = ''
-    wrapProgram $out/bin/vhs --prefix PATH : ${lib.makeBinPath (lib.optionals stdenv.isLinux [ chromium ] ++ [ ffmpeg ttyd ])}
+    wrapProgram $out/bin/vhs --prefix PATH : ${lib.makeBinPath (lib.optionals stdenv.hostPlatform.isLinux [ chromium ] ++ [ ffmpeg ttyd ])}
     $out/bin/vhs man > vhs.1
     installManPage vhs.1
     installShellCompletion --cmd vhs \
diff --git a/pkgs/applications/misc/viking/default.nix b/pkgs/applications/misc/viking/default.nix
index 1335d950405f..cb3ab09e31bc 100644
--- a/pkgs/applications/misc/viking/default.nix
+++ b/pkgs/applications/misc/viking/default.nix
@@ -10,7 +10,7 @@
 , withMBTiles ? true, sqlite
 , withMd5Hash ? true, nettle
 , withOAuth ? true, liboauth
-, withRealtimeGPSTracking ? (!stdenv.isDarwin), gpsd
+, withRealtimeGPSTracking ? (!stdenv.hostPlatform.isDarwin), gpsd
 }:
 
 stdenv.mkDerivation rec {
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ docbook_xml_dtd_45 docbook_xsl intltool itstool libxslt pkg-config wrapGAppsHook3 yelp-tools ]
-    ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+    ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [ curl gdk-pixbuf gtk3 json-glib libxml2 ]
     ++ lib.optional withGeoClue geoclue2
diff --git a/pkgs/applications/misc/visidata/default.nix b/pkgs/applications/misc/visidata/default.nix
index cb6033fa4b62..d7a7c4d9f75f 100644
--- a/pkgs/applications/misc/visidata/default.nix
+++ b/pkgs/applications/misc/visidata/default.nix
@@ -40,7 +40,7 @@
 # other
 , git
 , withPcap ? true, dpkt, dnslib
-, withXclip ? stdenv.isLinux, xclip
+, withXclip ? stdenv.hostPlatform.isLinux, xclip
 , testers
 , visidata
 }:
diff --git a/pkgs/applications/misc/wordnet/default.nix b/pkgs/applications/misc/wordnet/default.nix
index fccd7585e41e..5ed42ab1fc29 100644
--- a/pkgs/applications/misc/wordnet/default.nix
+++ b/pkgs/applications/misc/wordnet/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = [ tcl tk ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   hardeningDisable = [ "format" ];
 
diff --git a/pkgs/applications/misc/workrave/default.nix b/pkgs/applications/misc/workrave/default.nix
index a0521d443937..869f7c63712c 100644
--- a/pkgs/applications/misc/workrave/default.nix
+++ b/pkgs/applications/misc/workrave/default.nix
@@ -85,7 +85,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Program to help prevent Repetitive Strain Injury";
     mainProgram = "workrave";
     longDescription = ''
diff --git a/pkgs/applications/misc/wthrr/default.nix b/pkgs/applications/misc/wthrr/default.nix
index 142d331be9f7..df95d41738e4 100644
--- a/pkgs/applications/misc/wthrr/default.nix
+++ b/pkgs/applications/misc/wthrr/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/applications/misc/xmrig/default.nix b/pkgs/applications/misc/xmrig/default.nix
index 2cea4d2dd45c..9b46c65b8003 100644
--- a/pkgs/applications/misc/xmrig/default.nix
+++ b/pkgs/applications/misc/xmrig/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     libmicrohttpd
     openssl
     hwloc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
     CoreServices
     OpenCL
diff --git a/pkgs/applications/misc/xmrig/proxy.nix b/pkgs/applications/misc/xmrig/proxy.nix
index fb69b92e8fe1..9efdbc700a64 100644
--- a/pkgs/applications/misc/xmrig/proxy.nix
+++ b/pkgs/applications/misc/xmrig/proxy.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     libuv
     libmicrohttpd
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     IOKit
   ];
diff --git a/pkgs/applications/misc/xpdf/default.nix b/pkgs/applications/misc/xpdf/default.nix
index 2315810e03ff..13b4097f8cdf 100644
--- a/pkgs/applications/misc/xpdf/default.nix
+++ b/pkgs/applications/misc/xpdf/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   # Fix "No known features for CXX compiler", see
   # https://cmake.org/pipermail/cmake/2016-December/064733.html and the note at
   # https://cmake.org/cmake/help/v3.10/command/cmake_minimum_required.html
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt --replace \
         'cmake_minimum_required(VERSION 2.8.12)' 'cmake_minimum_required(VERSION 3.1.0)'
     '';
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     categories = [ "Office" ];
   };
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     install -Dm644 ${desktopItem}/share/applications/xpdf.desktop -t $out/share/applications
     install -Dm644 $src/xpdf-qt/xpdf-icon.svg $out/share/pixmaps/xpdf.svg
   '';
diff --git a/pkgs/applications/misc/xygrib/default.nix b/pkgs/applications/misc/xygrib/default.nix
index 4ce68f77e25b..32605747399a 100644
--- a/pkgs/applications/misc/xygrib/default.nix
+++ b/pkgs/applications/misc/xygrib/default.nix
@@ -14,10 +14,10 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake qttools wrapQtAppsHook ];
   buildInputs = [ bzip2 qtbase libnova proj_7 openjpeg libpng ];
   cmakeFlags = [ "-DOPENJPEG_INCLUDE_DIR=${openjpeg.dev}/include/openjpeg-${lib.versions.majorMinor openjpeg.version}" ]
-    ++ lib.optionals stdenv.isDarwin [ "-DLIBNOVA_LIBRARY=${libnova}/lib/libnova.dylib" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-DLIBNOVA_LIBRARY=${libnova}/lib/libnova.dylib" ];
 
   postInstall =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       mkdir -p "$out/Applications" "$out/XyGrib/XyGrib.app/Contents/Resources"
       cp "../data/img/xyGrib.icns" "$out/XyGrib/XyGrib.app/Contents/Resources/xyGrib.icns"
       mv $out/XyGrib/XyGrib.app $out/Applications
diff --git a/pkgs/applications/misc/zathura/core/default.nix b/pkgs/applications/misc/zathura/core/default.nix
index c2a4abacb50e..4aff5303ee18 100644
--- a/pkgs/applications/misc/zathura/core/default.nix
+++ b/pkgs/applications/misc/zathura/core/default.nix
@@ -90,9 +90,9 @@ stdenv.mkDerivation (finalAttrs: {
     check
     json-glib
     texlive.bin.core
-  ] ++ lib.optional stdenv.isLinux libseccomp ++ lib.optional stdenv.isDarwin gtk-mac-integration;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux libseccomp ++ lib.optional stdenv.hostPlatform.isDarwin gtk-mac-integration;
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru.updateScript = gitUpdater { };
 
diff --git a/pkgs/applications/misc/zathura/pdf-mupdf/default.nix b/pkgs/applications/misc/zathura/pdf-mupdf/default.nix
index b49371b24dea..f0fd28d4a444 100644
--- a/pkgs/applications/misc/zathura/pdf-mupdf/default.nix
+++ b/pkgs/applications/misc/zathura/pdf-mupdf/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
     tesseract
     leptonica
     mujs
-  ] ++ lib.optional stdenv.isDarwin gtk-mac-integration;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin gtk-mac-integration;
 
   env.PKG_CONFIG_ZATHURA_PLUGINDIR = "lib/zathura";
 
diff --git a/pkgs/applications/misc/zine/default.nix b/pkgs/applications/misc/zine/default.nix
index c7fb80e8318b..40d8b6160365 100644
--- a/pkgs/applications/misc/zine/default.nix
+++ b/pkgs/applications/misc/zine/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/applications/networking/adguardian/default.nix b/pkgs/applications/networking/adguardian/default.nix
index 21123d47e5d1..425974fee511 100644
--- a/pkgs/applications/networking/adguardian/default.nix
+++ b/pkgs/applications/networking/adguardian/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-IPkKiXuFN0KFlcrrSjLmML+O5zCrVRKEqdyV2xBsCsg=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/networking/avalanchego/default.nix b/pkgs/applications/networking/avalanchego/default.nix
index a845bb2bfdd8..97bf552604d4 100644
--- a/pkgs/applications/networking/avalanchego/default.nix
+++ b/pkgs/applications/networking/avalanchego/default.nix
@@ -20,7 +20,7 @@ buildGoModule rec {
   # go mod vendor has a bug, see: https://github.com/golang/go/issues/57529
   proxyVendor = true;
 
-  buildInputs = lib.optionals stdenv.isDarwin [ IOKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   subPackages = [ "main" ];
 
diff --git a/pkgs/applications/networking/browsers/asuka/default.nix b/pkgs/applications/networking/browsers/asuka/default.nix
index 1451e4bbaabd..786f11d2d743 100644
--- a/pkgs/applications/networking/browsers/asuka/default.nix
+++ b/pkgs/applications/networking/browsers/asuka/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ ncurses openssl ]
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Gemini Project client written in Rust with NCurses";
diff --git a/pkgs/applications/networking/browsers/brave/default.nix b/pkgs/applications/networking/browsers/brave/default.nix
index 1dddb46519fc..af50ac1b7593 100644
--- a/pkgs/applications/networking/browsers/brave/default.nix
+++ b/pkgs/applications/networking/browsers/brave/default.nix
@@ -3,7 +3,7 @@
 
 callPackage ./make-brave.nix (removeAttrs args [ "callPackage" ])
   (
-    if stdenv.isAarch64 then
+    if stdenv.hostPlatform.isAarch64 then
       rec {
         pname = "brave";
         version = "1.70.117";
@@ -11,7 +11,7 @@ callPackage ./make-brave.nix (removeAttrs args [ "callPackage" ])
         hash = "sha256-FUomXWnIbuW8H0/r+fKEmMG8qO0vBAKUS9kijCbH5Mc=";
         platform = "aarch64-linux";
       }
-    else if stdenv.isx86_64 then
+    else if stdenv.hostPlatform.isx86_64 then
       rec {
         pname = "brave";
         version = "1.70.117";
diff --git a/pkgs/applications/networking/browsers/brave/make-brave.nix b/pkgs/applications/networking/browsers/brave/make-brave.nix
index 0a4345593bba..e94e1a93bf72 100644
--- a/pkgs/applications/networking/browsers/brave/make-brave.nix
+++ b/pkgs/applications/networking/browsers/brave/make-brave.nix
@@ -49,14 +49,14 @@
 , commandLineArgs ? ""
 
 # Necessary for USB audio devices.
-, pulseSupport ? stdenv.isLinux
+, pulseSupport ? stdenv.hostPlatform.isLinux
 , libpulseaudio
 
 # For GPU acceleration support on Wayland (without the lib it doesn't seem to work)
 , libGL
 
 # For video acceleration via VA-API (--enable-features=VaapiVideoDecoder,VaapiVideoEncoder)
-, libvaSupport ? stdenv.isLinux
+, libvaSupport ? stdenv.hostPlatform.isLinux
 , libva
 , enableVideoAcceleration ? libvaSupport
 
diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index bebb279f1a66..484cc0e4f194 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -16,7 +16,7 @@
 , enableWideVine ? false
 , ungoogled ? false # Whether to build chromium or ungoogled-chromium
 , cupsSupport ? true
-, pulseSupport ? config.pulseaudio or stdenv.isLinux
+, pulseSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux
 , commandLineArgs ? ""
 , pkgsBuildBuild
 , pkgs
diff --git a/pkgs/applications/networking/browsers/elinks/default.nix b/pkgs/applications/networking/browsers/elinks/default.nix
index 8a129f2fdab8..3dd71ab810e7 100644
--- a/pkgs/applications/networking/browsers/elinks/default.nix
+++ b/pkgs/applications/networking/browsers/elinks/default.nix
@@ -4,7 +4,7 @@
 , # Incompatible licenses, LGPLv3 - GPLv2
   enableGuile        ? false,                                         guile ? null
 , enablePython       ? false,                                         python ? null
-, enablePerl         ? (!stdenv.isDarwin) && (stdenv.hostPlatform == stdenv.buildPlatform), perl ? null
+, enablePerl         ? (!stdenv.hostPlatform.isDarwin) && (stdenv.hostPlatform == stdenv.buildPlatform), perl ? null
 # re-add javascript support when upstream supports modern spidermonkey
 }:
 
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     ncurses libX11 bzip2 zlib brotli zstd xz
     openssl libidn tre expat libev
   ]
-    ++ lib.optional stdenv.isLinux gpm
+    ++ lib.optional stdenv.hostPlatform.isLinux gpm
     ++ lib.optional enableGuile guile
     ++ lib.optional enablePython python
     ++ lib.optional enablePerl perl
diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index 3787c618a6aa..77e020ff0cea 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -94,20 +94,20 @@ in
 , debugBuild ? false
 
 # On 32bit platforms, we disable adding "-g" for easier linking.
-, enableDebugSymbols ? !stdenv.is32bit
+, enableDebugSymbols ? !stdenv.hostPlatform.is32bit
 
 ## optional libraries
 
-, alsaSupport ? stdenv.isLinux, alsa-lib
+, alsaSupport ? stdenv.hostPlatform.isLinux, alsa-lib
 , ffmpegSupport ? true
 , gssSupport ? true, libkrb5
-, jackSupport ? stdenv.isLinux, libjack2
+, jackSupport ? stdenv.hostPlatform.isLinux, libjack2
 , jemallocSupport ? !stdenv.hostPlatform.isMusl, jemalloc
-, ltoSupport ? (stdenv.isLinux && stdenv.is64bit && !stdenv.hostPlatform.isRiscV), overrideCC, buildPackages
-, pgoSupport ? (stdenv.isLinux && stdenv.hostPlatform == stdenv.buildPlatform), xvfb-run
+, ltoSupport ? (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.is64bit && !stdenv.hostPlatform.isRiscV), overrideCC, buildPackages
+, pgoSupport ? (stdenv.hostPlatform.isLinux && stdenv.hostPlatform == stdenv.buildPlatform), xvfb-run
 , pipewireSupport ? waylandSupport && webrtcSupport
-, pulseaudioSupport ? stdenv.isLinux, libpulseaudio
-, sndioSupport ? stdenv.isLinux, sndio
+, pulseaudioSupport ? stdenv.hostPlatform.isLinux, libpulseaudio
+, sndioSupport ? stdenv.hostPlatform.isLinux, sndio
 , waylandSupport ? true, libxkbcommon, libdrm
 
 ## privacy-related options
@@ -363,7 +363,7 @@ buildStdenv.mkDerivation {
     # please get your own set of keys at https://location.services.mozilla.com/api.
     echo "dfd7836c-d458-4917-98bb-421c82d3c8a0" > $TMPDIR/mls-api-key
     configureFlagsArray+=("--with-mozilla-api-keyfile=$TMPDIR/mls-api-key")
-  '' + lib.optionalString (enableOfficialBranding && !stdenv.is32bit) ''
+  '' + lib.optionalString (enableOfficialBranding && !stdenv.hostPlatform.is32bit) ''
     export MOZILLA_OFFICIAL=1
   '' + lib.optionalString (!requireSigning) ''
     export MOZ_REQUIRE_SIGNING=
@@ -406,7 +406,7 @@ buildStdenv.mkDerivation {
   ]
   # elf-hack is broken when using clang+lld:
   # https://bugzilla.mozilla.org/show_bug.cgi?id=1482204
-  ++ lib.optional (ltoSupport && (buildStdenv.isAarch32 || buildStdenv.isi686 || buildStdenv.isx86_64)) "--disable-elf-hack"
+  ++ lib.optional (ltoSupport && (buildStdenv.hostPlatform.isAarch32 || buildStdenv.hostPlatform.isi686 || buildStdenv.hostPlatform.isx86_64)) "--disable-elf-hack"
   ++ lib.optional (!drmSupport) "--disable-eme"
   ++ lib.optional (allowAddonSideload) "--allow-addon-sideload"
   ++ [
@@ -424,7 +424,7 @@ buildStdenv.mkDerivation {
     (if debugBuild then "--enable-profiling" else "--enable-optimize")
     # --enable-release adds -ffunction-sections & LTO that require a big amount
     # of RAM, and the 32-bit memory space cannot handle that linking
-    (enableFeature (!debugBuild && !stdenv.is32bit) "release")
+    (enableFeature (!debugBuild && !stdenv.hostPlatform.is32bit) "release")
     (enableFeature enableDebugSymbols "debug-symbols")
   ]
   ++ lib.optionals enableDebugSymbols [ "--disable-strip" "--disable-install-strip" ]
@@ -540,7 +540,7 @@ buildStdenv.mkDerivation {
     install -Dvm644 ${distributionIni} $out/lib/${binaryName}/distribution/distribution.ini
     install -Dvm644 ${defaultPrefsFile} $out/lib/${binaryName}/browser/defaults/preferences/nixos-default-prefs.js
 
-  '' + lib.optionalString buildStdenv.isLinux ''
+  '' + lib.optionalString buildStdenv.hostPlatform.isLinux ''
     # Remove SDK cruft. FIXME: move to a separate output?
     rm -rf $out/share/idl $out/include $out/lib/${binaryName}-devel-*
 
diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index bbc88581e1e5..6a34a531c7f1 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -86,7 +86,7 @@ let
                 else [])
        );
 
-      libs =   lib.optionals stdenv.isLinux [ udev libva mesa libnotify xorg.libXScrnSaver cups pciutils ]
+      libs =   lib.optionals stdenv.hostPlatform.isLinux [ udev libva mesa libnotify xorg.libXScrnSaver cups pciutils ]
             ++ lib.optional pipewireSupport pipewire
             ++ lib.optional ffmpegSupport ffmpeg
             ++ lib.optional gssSupport libkrb5
diff --git a/pkgs/applications/networking/browsers/kristall/default.nix b/pkgs/applications/networking/browsers/kristall/default.nix
index 3515f0e30e01..f228c9730684 100644
--- a/pkgs/applications/networking/browsers/kristall/default.nix
+++ b/pkgs/applications/networking/browsers/kristall/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   qmakeFlags = [ "src/kristall.pro" ];
 
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
     mv kristall.app $out/Applications
   '' else ''
diff --git a/pkgs/applications/networking/browsers/ladybird/default.nix b/pkgs/applications/networking/browsers/ladybird/default.nix
index c77e70f01aa1..60157ca26282 100644
--- a/pkgs/applications/networking/browsers/ladybird/default.nix
+++ b/pkgs/applications/networking/browsers/ladybird/default.nix
@@ -145,9 +145,9 @@ stdenv.mkDerivation (finalAttrs: {
     simdutf
     skia
     woff2
-  ] ++ lib.optional stdenv.isLinux [
+  ] ++ lib.optional stdenv.hostPlatform.isLinux [
     qtwayland
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
@@ -158,7 +158,7 @@ stdenv.mkDerivation (finalAttrs: {
     # Disable network operations
     "-DSERENITY_CACHE_DIR=Caches"
     "-DENABLE_NETWORK_DOWNLOADS=OFF"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DCMAKE_INSTALL_LIBEXECDIR=libexec"
   ];
 
@@ -167,14 +167,14 @@ stdenv.mkDerivation (finalAttrs: {
 
   env.NIX_CFLAGS_COMPILE = "-Wno-error";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications $out/bin
     mv $out/bundle/Ladybird.app $out/Applications
   '';
 
   # Only Ladybird and WebContent need wrapped, if Qt is enabled.
   # On linux we end up wraping some non-Qt apps, like headless-browser.
-  dontWrapQtApps = stdenv.isDarwin;
+  dontWrapQtApps = stdenv.hostPlatform.isDarwin;
 
   passthru.tests = {
     nixosTest = nixosTests.ladybird;
@@ -188,6 +188,6 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
     mainProgram = "Ladybird";
     # use of undeclared identifier 'NSBezelStyleAccessoryBarAction'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/networking/browsers/lagrange/default.nix b/pkgs/applications/networking/browsers/lagrange/default.nix
index 7a486ec65fe9..d6770a85138e 100644
--- a/pkgs/applications/networking/browsers/lagrange/default.nix
+++ b/pkgs/applications/networking/browsers/lagrange/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [ the-foundation ]
     ++ lib.optionals (!enableTUI) [ fribidi harfbuzz libwebp mpg123 SDL2 ]
     ++ lib.optionals enableTUI [ ncurses sealcurses ]
-    ++ lib.optional stdenv.isDarwin AppKit;
+    ++ lib.optional stdenv.hostPlatform.isDarwin AppKit;
 
   cmakeFlags = lib.optionals enableTUI [
     "-DENABLE_TUI=YES"
@@ -44,7 +44,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DCMAKE_INSTALL_DATADIR=${placeholder "out"}/share"
   ];
 
-  installPhase = lib.optionalString (stdenv.isDarwin && !enableTUI) ''
+  installPhase = lib.optionalString (stdenv.hostPlatform.isDarwin && !enableTUI) ''
     mkdir -p $out/Applications
     mv Lagrange.app $out/Applications
   '';
diff --git a/pkgs/applications/networking/browsers/links2/default.nix b/pkgs/applications/networking/browsers/links2/default.nix
index 9fe4fe7e37f2..12968f2f56cf 100644
--- a/pkgs/applications/networking/browsers/links2/default.nix
+++ b/pkgs/applications/networking/browsers/links2/default.nix
@@ -2,9 +2,9 @@
 , gpm, openssl, pkg-config, libev # Misc.
 , libpng, libjpeg, libtiff, librsvg, libavif # graphic formats
 , bzip2, zlib, xz # Transfer encodings
-, enableFB ? (!stdenv.isDarwin)
+, enableFB ? (!stdenv.hostPlatform.isDarwin)
 , enableDirectFB ? false, directfb
-, enableX11 ? (!stdenv.isDarwin), libX11, libXt, libXau # GUI support
+, enableX11 ? (!stdenv.hostPlatform.isDarwin), libX11, libXt, libXau # GUI support
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs =
     [ libev librsvg libpng libjpeg libtiff libavif openssl xz bzip2 zlib ]
-    ++ lib.optionals stdenv.isLinux [ gpm ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ gpm ]
     ++ lib.optionals enableX11 [ libX11 libXau libXt ]
     ++ lib.optionals enableDirectFB [ directfb ];
 
diff --git a/pkgs/applications/networking/browsers/netsurf/browser.nix b/pkgs/applications/networking/browsers/netsurf/browser.nix
index cd1b78fc2980..2397145a21c4 100644
--- a/pkgs/applications/networking/browsers/netsurf/browser.nix
+++ b/pkgs/applications/networking/browsers/netsurf/browser.nix
@@ -107,7 +107,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   env.NIX_CFLAGS_COMPILE = "-fcommon";
 
-  env.CFLAGS = lib.optionalString stdenv.isDarwin "-D_DARWIN_C_SOURCE";
+  env.CFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-D_DARWIN_C_SOURCE";
 
   patchPhase = lib.optionalString stdenv.cc.isClang ''
     runHook prePatch
diff --git a/pkgs/applications/networking/browsers/qutebrowser/default.nix b/pkgs/applications/networking/browsers/qutebrowser/default.nix
index 3f676ecd6cc0..64fee95385cc 100644
--- a/pkgs/applications/networking/browsers/qutebrowser/default.nix
+++ b/pkgs/applications/networking/browsers/qutebrowser/default.nix
@@ -3,7 +3,7 @@
 , asciidoc, docbook_xml_dtd_45, docbook_xsl, libxml2
 , libxslt
 , withPdfReader      ? true
-, pipewireSupport    ? stdenv.isLinux
+, pipewireSupport    ? stdenv.hostPlatform.isLinux
 , pipewire
 , qtwayland
 , qtbase
@@ -43,7 +43,7 @@ python3.pkgs.buildPythonApplication {
   buildInputs = [
     qtbase
     glib-networking
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
diff --git a/pkgs/applications/networking/browsers/vivaldi/default.nix b/pkgs/applications/networking/browsers/vivaldi/default.nix
index e9582cbdd985..6e6299fb556b 100644
--- a/pkgs/applications/networking/browsers/vivaldi/default.nix
+++ b/pkgs/applications/networking/browsers/vivaldi/default.nix
@@ -15,7 +15,7 @@
 , proprietaryCodecs ? false, vivaldi-ffmpeg-codecs ? null
 , enableWidevine ? false, widevine-cdm ? null
 , commandLineArgs ? ""
-, pulseSupport ? stdenv.isLinux, libpulseaudio
+, pulseSupport ? stdenv.hostPlatform.isLinux, libpulseaudio
 , kerberosSupport ? true, libkrb5
 }:
 
@@ -62,7 +62,7 @@ in stdenv.mkDerivation rec {
     ++ lib.optional kerberosSupport libkrb5;
 
   libPath = lib.makeLibraryPath buildInputs
-    + lib.optionalString (stdenv.is64bit)
+    + lib.optionalString (stdenv.hostPlatform.is64bit)
       (":" + lib.makeSearchPathOutput "lib" "lib64" buildInputs)
     + ":$out/opt/${vivaldiName}/lib";
 
diff --git a/pkgs/applications/networking/browsers/w3m/default.nix b/pkgs/applications/networking/browsers/w3m/default.nix
index 827202ae3818..8ea48ffbad99 100644
--- a/pkgs/applications/networking/browsers/w3m/default.nix
+++ b/pkgs/applications/networking/browsers/w3m/default.nix
@@ -1,9 +1,9 @@
 { lib, stdenv, fetchFromGitHub, fetchpatch
 , ncurses, boehmgc, gettext, zlib
 , sslSupport ? true, openssl
-, graphicsSupport ? !stdenv.isDarwin, imlib2
+, graphicsSupport ? !stdenv.hostPlatform.isDarwin, imlib2
 , x11Support ? graphicsSupport, libX11
-, mouseSupport ? !stdenv.isDarwin, gpm-ncurses
+, mouseSupport ? !stdenv.hostPlatform.isDarwin, gpm-ncurses
 , perl, man, pkg-config, buildPackages, w3m
 , testers, updateAutotoolsGnuConfigScriptsHook
 }:
@@ -29,7 +29,7 @@ in stdenv.mkDerivation rec {
     hash = "sha256-upb5lWqhC1jRegzTncIz5e21v4Pw912FyVn217HucFs=";
   };
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isSunOS "-lsocket -lnsl";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isSunOS "-lsocket -lnsl";
 
   # we must set these so that the generated files (e.g. w3mhelp.cgi) contain
   # the correct paths.
diff --git a/pkgs/applications/networking/cloudflared/default.nix b/pkgs/applications/networking/cloudflared/default.nix
index f2d841a419bc..5b297129c309 100644
--- a/pkgs/applications/networking/cloudflared/default.nix
+++ b/pkgs/applications/networking/cloudflared/default.nix
@@ -69,7 +69,7 @@ buildGoModule rec {
       --replace "TestManagerCtxDoneCloseSessions" "SkipManagerCtxDoneCloseSessions"
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru = {
     tests.simple = callPackage ./tests.nix { inherit version; };
diff --git a/pkgs/applications/networking/cluster/click/default.nix b/pkgs/applications/networking/cluster/click/default.nix
index de8e4b38754c..a471c5827c76 100644
--- a/pkgs/applications/networking/cluster/click/default.nix
+++ b/pkgs/applications/networking/cluster/click/default.nix
@@ -13,10 +13,10 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-fcJTxZX9mdF4oFl/Cn1egczRy+yhWt2zLKsdLKz6Q+s=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   meta = with lib; {
     description = ''The "Command Line Interactive Controller for Kubernetes"'';
diff --git a/pkgs/applications/networking/cluster/cmctl/default.nix b/pkgs/applications/networking/cluster/cmctl/default.nix
index 98fb309942ea..b103450942c7 100644
--- a/pkgs/applications/networking/cluster/cmctl/default.nix
+++ b/pkgs/applications/networking/cluster/cmctl/default.nix
@@ -35,7 +35,7 @@ buildGoModule rec {
   ];
 
   # Trusted by this computer: no: x509: “cert-manager” certificate is not trusted
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postInstall = ''
     mv $out/bin/ctl $out/bin/cmctl
diff --git a/pkgs/applications/networking/cluster/hadoop/default.nix b/pkgs/applications/networking/cluster/hadoop/default.nix
index 91727d4f5801..02acad93a315 100644
--- a/pkgs/applications/networking/cluster/hadoop/default.nix
+++ b/pkgs/applications/networking/cluster/hadoop/default.nix
@@ -31,26 +31,26 @@ let
       version = platformAttrs.${stdenv.system}.version or (throw "Unsupported system: ${stdenv.system}");
       src = fetchurl {
         url = "mirror://apache/hadoop/common/hadoop-${finalAttrs.version}/hadoop-${finalAttrs.version}"
-              + lib.optionalString stdenv.isAarch64 "-aarch64" + ".tar.gz";
+              + lib.optionalString stdenv.hostPlatform.isAarch64 "-aarch64" + ".tar.gz";
         inherit (platformAttrs.${stdenv.system} or (throw "Unsupported system: ${stdenv.system}")) hash;
       };
       doCheck = true;
 
       # Build the container executor binary from source
       # InstallPhase is not lazily evaluating containerExecutor for some reason
-      containerExecutor = if stdenv.isLinux then (callPackage ./containerExecutor.nix {
+      containerExecutor = if stdenv.hostPlatform.isLinux then (callPackage ./containerExecutor.nix {
         inherit (finalAttrs) version;
         inherit platformAttrs;
       }) else "";
 
       nativeBuildInputs = [ makeWrapper ]
-                          ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
-      buildInputs = lib.optionals stdenv.isLinux [ stdenv.cc.cc.lib openssl protobuf zlib snappy libtirpc ];
+                          ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
+      buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ stdenv.cc.cc.lib openssl protobuf zlib snappy libtirpc ];
 
       installPhase = ''
         mkdir $out
         mv * $out/
-      '' + lib.optionalString stdenv.isLinux ''
+      '' + lib.optionalString stdenv.hostPlatform.isLinux ''
         for n in $(find ${finalAttrs.containerExecutor}/bin -type f); do
           ln -sf "$n" $out/bin
         done
diff --git a/pkgs/applications/networking/cluster/jx/default.nix b/pkgs/applications/networking/cluster/jx/default.nix
index 8d8ad429cb2a..9bb95b36dad0 100644
--- a/pkgs/applications/networking/cluster/jx/default.nix
+++ b/pkgs/applications/networking/cluster/jx/default.nix
@@ -33,7 +33,7 @@ buildGoModule rec {
   passthru.updateScript = nix-update-script { };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Command line tool for installing and using Jenkins X";
     mainProgram = "jx";
     homepage = "https://jenkins-x.io";
diff --git a/pkgs/applications/networking/cluster/k3s/builder.nix b/pkgs/applications/networking/cluster/k3s/builder.nix
index 1fb10c82dcc1..8d66882a8a97 100644
--- a/pkgs/applications/networking/cluster/k3s/builder.nix
+++ b/pkgs/applications/networking/cluster/k3s/builder.nix
@@ -150,9 +150,9 @@ let
   # a shortcut that provides the images archive for the host platform. Currently only supports
   # aarch64 (arm64) and x86_64 (amd64), aborts on other architectures.
   airgapImages = fetchurl (
-    if stdenv.isAarch64 then
+    if stdenv.hostPlatform.isAarch64 then
       imagesVersions.${findImagesArchive "arm64"}
-    else if stdenv.isx86_64 then
+    else if stdenv.hostPlatform.isx86_64 then
       imagesVersions.${findImagesArchive "amd64"}
     else
       abort "k3s: airgap images cannot be found automatically for architecture ${stdenv.hostPlatform.linuxArch}, consider using an image archive with an explicit architecture."
diff --git a/pkgs/applications/networking/cluster/k9s/default.nix b/pkgs/applications/networking/cluster/k9s/default.nix
index 8e91f641a7a3..5bd085f2bb59 100644
--- a/pkgs/applications/networking/cluster/k9s/default.nix
+++ b/pkgs/applications/networking/cluster/k9s/default.nix
@@ -26,7 +26,7 @@ buildGoModule rec {
   vendorHash = "sha256-U/tIsYpoog3S8V2yQGGqaQ+Av7TfvCYt3zn74qWuQKs=";
 
   # TODO investigate why some config tests are failing
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64);
   # Required to workaround test check error:
   preCheck = "export HOME=$(mktemp -d)";
   # For arch != x86
diff --git a/pkgs/applications/networking/cluster/kpt/default.nix b/pkgs/applications/networking/cluster/kpt/default.nix
index d7aa86fd7d39..ccccec1c8562 100644
--- a/pkgs/applications/networking/cluster/kpt/default.nix
+++ b/pkgs/applications/networking/cluster/kpt/default.nix
@@ -23,6 +23,6 @@ buildGoModule rec {
     homepage = "https://googlecontainertools.github.io/kpt/";
     license = licenses.asl20;
     maintainers = with maintainers; [ mikefaille ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/networking/cluster/kubectl-view-allocations/default.nix b/pkgs/applications/networking/cluster/kubectl-view-allocations/default.nix
index 25e11043252b..8f912c267019 100644
--- a/pkgs/applications/networking/cluster/kubectl-view-allocations/default.nix
+++ b/pkgs/applications/networking/cluster/kubectl-view-allocations/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
     lockFile = ./Cargo.lock;
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "kubectl plugin to list allocations (cpu, memory, gpu,... X utilization, requested, limit, allocatable,...)";
diff --git a/pkgs/applications/networking/cluster/lens/default.nix b/pkgs/applications/networking/cluster/lens/default.nix
index 3e59a1fc23df..98c9ca2d1758 100644
--- a/pkgs/applications/networking/cluster/lens/default.nix
+++ b/pkgs/applications/networking/cluster/lens/default.nix
@@ -35,7 +35,7 @@ let
     platforms = builtins.attrNames sources;
   };
 
-in if stdenv.isDarwin then
+in if stdenv.hostPlatform.isDarwin then
   callPackage ./darwin.nix { inherit pname version src meta; }
 else
   callPackage ./linux.nix { inherit pname version src meta; }
diff --git a/pkgs/applications/networking/cluster/minikube/default.nix b/pkgs/applications/networking/cluster/minikube/default.nix
index ad018b0b5e61..a367c8bc3aab 100644
--- a/pkgs/applications/networking/cluster/minikube/default.nix
+++ b/pkgs/applications/networking/cluster/minikube/default.nix
@@ -29,14 +29,14 @@ buildGoModule rec {
   };
   postPatch =
     (
-      lib.optionalString (withQemu && stdenv.isDarwin) ''
+      lib.optionalString (withQemu && stdenv.hostPlatform.isDarwin) ''
         substituteInPlace \
           pkg/minikube/registry/drvs/qemu2/qemu2.go \
           --replace "/usr/local/opt/qemu/share/qemu" "${qemu}/share/qemu" \
           --replace "/opt/homebrew/opt/qemu/share/qemu" "${qemu}/share/qemu"
       ''
     ) + (
-      lib.optionalString (withQemu && stdenv.isLinux) ''
+      lib.optionalString (withQemu && stdenv.hostPlatform.isLinux) ''
         substituteInPlace \
           pkg/minikube/registry/drvs/qemu2/qemu2.go \
           --replace "/usr/share/OVMF/OVMF_CODE.fd" "${OVMF.firmware}" \
@@ -46,7 +46,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ installShellFiles pkg-config which makeWrapper ];
 
-  buildInputs = if stdenv.isDarwin then [ vmnet ] else if stdenv.isLinux then [ libvirt ] else null;
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ vmnet ] else if stdenv.hostPlatform.isLinux then [ libvirt ] else null;
 
   buildPhase = ''
     make COMMIT=${src.rev}
diff --git a/pkgs/applications/networking/cluster/node-problem-detector/default.nix b/pkgs/applications/networking/cluster/node-problem-detector/default.nix
index 4daed56dd9d3..e30d89a9a34c 100644
--- a/pkgs/applications/networking/cluster/node-problem-detector/default.nix
+++ b/pkgs/applications/networking/cluster/node-problem-detector/default.nix
@@ -20,15 +20,15 @@ buildGoModule rec {
   # Linux-only feature. See 'ENABLE_JOURNALD' upstream:
   # https://github.com/kubernetes/node-problem-detector/blob/master/Makefile
   subPackages = [ "cmd/nodeproblemdetector" ] ++
-    lib.optionals stdenv.isLinux [ "cmd/logcounter" ];
+    lib.optionals stdenv.hostPlatform.isLinux [ "cmd/logcounter" ];
 
   preBuild = ''
-    export CGO_ENABLED=${if stdenv.isLinux then "1" else "0"}
+    export CGO_ENABLED=${if stdenv.hostPlatform.isLinux then "1" else "0"}
   '';
 
-  buildInputs = lib.optionals stdenv.isLinux [ systemd ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ systemd ];
 
-  tags = lib.optionals stdenv.isLinux [ "journald" ];
+  tags = lib.optionals stdenv.hostPlatform.isLinux [ "journald" ];
 
   ldflags = [
     "-X k8s.io/${pname}/pkg/version.version=v${version}"
diff --git a/pkgs/applications/networking/cluster/ocm/default.nix b/pkgs/applications/networking/cluster/ocm/default.nix
index f83347d0538e..1b2b5568cdd1 100644
--- a/pkgs/applications/networking/cluster/ocm/default.nix
+++ b/pkgs/applications/networking/cluster/ocm/default.nix
@@ -24,7 +24,7 @@ buildGoModule rec {
   '';
 
   # Tests fail in Darwin sandbox.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postInstall = ''
     installShellCompletion --cmd ocm \
diff --git a/pkgs/applications/networking/cluster/rke2/builder.nix b/pkgs/applications/networking/cluster/rke2/builder.nix
index 58a9d6c629ea..21941ad8ee0a 100644
--- a/pkgs/applications/networking/cluster/rke2/builder.nix
+++ b/pkgs/applications/networking/cluster/rke2/builder.nix
@@ -91,7 +91,7 @@ buildGoModule rec {
       package = rke2;
       version = "v${version}";
     };
-  } // lib.optionalAttrs stdenv.isLinux {
+  } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
     inherit (nixosTests) rke2;
   };
 
diff --git a/pkgs/applications/networking/cluster/temporal-cli/default.nix b/pkgs/applications/networking/cluster/temporal-cli/default.nix
index 3e36eda8e6b2..101d3baa6c5d 100644
--- a/pkgs/applications/networking/cluster/temporal-cli/default.nix
+++ b/pkgs/applications/networking/cluster/temporal-cli/default.nix
@@ -41,7 +41,7 @@ let
     ];
 
     # Tests fail with x86 on macOS Rosetta 2
-    doCheck = !(stdenv.isDarwin && stdenv.hostPlatform.isx86_64);
+    doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64);
 
     preCheck = ''
       export HOME="$(mktemp -d)"
diff --git a/pkgs/applications/networking/compactor/default.nix b/pkgs/applications/networking/compactor/default.nix
index 12e6f432c5bd..88f0b34fd27c 100644
--- a/pkgs/applications/networking/compactor/default.nix
+++ b/pkgs/applications/networking/compactor/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   ];
   enableParallelBuilding = true;
 
-  doCheck = !stdenv.isDarwin; # check-dnstap.sh failing on Darwin
+  doCheck = !stdenv.hostPlatform.isDarwin; # check-dnstap.sh failing on Darwin
   nativeCheckInputs = [
     cbor-diag
     cddl
diff --git a/pkgs/applications/networking/diswall/default.nix b/pkgs/applications/networking/diswall/default.nix
index 76be6f3f75ce..356f8f622c35 100644
--- a/pkgs/applications/networking/diswall/default.nix
+++ b/pkgs/applications/networking/diswall/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-iZln/cgYGSFYwXDvD1CkQdfwBDXj897X1il1m5HfFJs=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/applications/networking/dyndns/dyndnsc/default.nix b/pkgs/applications/networking/dyndns/dyndnsc/default.nix
index d9da9e48c7fb..a4c84ee7e76a 100644
--- a/pkgs/applications/networking/dyndns/dyndnsc/default.nix
+++ b/pkgs/applications/networking/dyndns/dyndnsc/default.nix
@@ -48,7 +48,7 @@ python3Packages.buildPythonApplication rec {
       # AssertionError
       "test_null_dummy"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # The tests that spawn a server using Bottle cannot be run on
       # macOS or Windows as the default multiprocessing start method
       # on those platforms is 'spawn', which requires the code to be
diff --git a/pkgs/applications/networking/feedreaders/newsboat/default.nix b/pkgs/applications/networking/feedreaders/newsboat/default.nix
index 43f3c565d244..144634d60d03 100644
--- a/pkgs/applications/networking/feedreaders/newsboat/default.nix
+++ b/pkgs/applications/networking/feedreaders/newsboat/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-0z3G8j0Qk0HEDUKA7fmjFfNW956rRtzKO+0ltNQR4es=";
 
   # TODO: Check if that's still needed
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Allow other ncurses versions on Darwin
     substituteInPlace config.sh \
       --replace "ncurses5.4" "ncurses"
@@ -25,10 +25,10 @@ rustPlatform.buildRustPackage rec {
     pkg-config
     asciidoctor
     gettext
-  ] ++ lib.optionals stdenv.isDarwin [ makeWrapper ncurses ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ makeWrapper ncurses ];
 
   buildInputs = [ stfl sqlite curl libxml2 json_c ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ Security Foundation libiconv gettext ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security Foundation libiconv gettext ];
 
   postBuild = ''
     make -j $NIX_BUILD_CORES prefix="$out"
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
 
   postInstall = ''
     make -j $NIX_BUILD_CORES prefix="$out" install
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     for prog in $out/bin/*; do
       wrapProgram "$prog" --prefix DYLD_LIBRARY_PATH : "${stfl}/lib"
     done
diff --git a/pkgs/applications/networking/feedreaders/rsstail/default.nix b/pkgs/applications/networking/feedreaders/rsstail/default.nix
index 524e8d76b697..cecad11a4f63 100644
--- a/pkgs/applications/networking/feedreaders/rsstail/default.nix
+++ b/pkgs/applications/networking/feedreaders/rsstail/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
     sha256 = "12p69i3g1fwlw0bds9jqsdmzkid3k5a41w31d227i7vm12wcvjf6";
   };
 
-  buildInputs = [ libmrss ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ libmrss ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   postPatch = ''
     substituteInPlace Makefile --replace -liconv_hook ""
diff --git a/pkgs/applications/networking/feedreaders/russ/default.nix b/pkgs/applications/networking/feedreaders/russ/default.nix
index 832f888dcfaa..3fbaa2108d60 100644
--- a/pkgs/applications/networking/feedreaders/russ/default.nix
+++ b/pkgs/applications/networking/feedreaders/russ/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage {
   # tests are network based :(
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreServices
     AppKit
   ]);
diff --git a/pkgs/applications/networking/feedreaders/tuifeed/default.nix b/pkgs/applications/networking/feedreaders/tuifeed/default.nix
index 0465fc31cf64..16bb0324d07a 100644
--- a/pkgs/applications/networking/feedreaders/tuifeed/default.nix
+++ b/pkgs/applications/networking/feedreaders/tuifeed/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-QKSNbpVRtSKp2q1jVPYTS8XCMtQAyg3AWvD/6+OjI7Y=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   doCheck = false;
 
diff --git a/pkgs/applications/networking/ftp/filezilla/default.nix b/pkgs/applications/networking/ftp/filezilla/default.nix
index 10cf454dc659..e8a1f90fbfa8 100644
--- a/pkgs/applications/networking/ftp/filezilla/default.nix
+++ b/pkgs/applications/networking/ftp/filezilla/default.nix
@@ -50,9 +50,9 @@ stdenv.mkDerivation rec {
     wxGTK32
     gtk3
     xdg-utils
-  ] ++ lib.optionals stdenv.isDarwin [ CoreServices Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security ];
 
-  preBuild = lib.optionalString (stdenv.isDarwin) ''
+  preBuild = lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     export MACOSX_DEPLOYMENT_TARGET=11.0
   '';
 
diff --git a/pkgs/applications/networking/gdrive3/default.nix b/pkgs/applications/networking/gdrive3/default.nix
index 4e7fea129654..3fc7af9b1417 100644
--- a/pkgs/applications/networking/gdrive3/default.nix
+++ b/pkgs/applications/networking/gdrive3/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/networking/gopher/phetch/default.nix b/pkgs/applications/networking/gopher/phetch/default.nix
index 9f835c8535e2..a74f94eceb60 100644
--- a/pkgs/applications/networking/gopher/phetch/default.nix
+++ b/pkgs/applications/networking/gopher/phetch/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-y3Y5PnZ51Zc3LmVTijUGnb0KaGm28sWOSYxjuM3A1Zk=";
 
   nativeBuildInputs = [ installShellFiles pkg-config scdoc which ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     make manual
diff --git a/pkgs/applications/networking/gopher/sacc/default.nix b/pkgs/applications/networking/gopher/sacc/default.nix
index dc4ed20d7204..92907d8a110d 100644
--- a/pkgs/applications/networking/gopher/sacc/default.nix
+++ b/pkgs/applications/networking/gopher/sacc/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ ncurses libressl ];
 
-  CFLAGS = lib.optionals stdenv.isDarwin [
+  CFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [
     "-D_DARWIN_C_SOURCE"
   ];
 
diff --git a/pkgs/applications/networking/ids/suricata/default.nix b/pkgs/applications/networking/ids/suricata/default.nix
index 14dbdacd7210..f654a96cb75d 100644
--- a/pkgs/applications/networking/ids/suricata/default.nix
+++ b/pkgs/applications/networking/ids/suricata/default.nix
@@ -80,7 +80,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  patches = lib.optional stdenv.is64bit ./bpf_stubs_workaround.patch;
+  patches = lib.optional stdenv.hostPlatform.is64bit ./bpf_stubs_workaround.patch;
 
   postPatch = ''
     substituteInPlace ./configure \
diff --git a/pkgs/applications/networking/ids/zeek/broker/default.nix b/pkgs/applications/networking/ids/zeek/broker/default.nix
index 49a13cdb2623..0fcdd5048c0e 100644
--- a/pkgs/applications/networking/ids/zeek/broker/default.nix
+++ b/pkgs/applications/networking/ids/zeek/broker/default.nix
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
     ./0001-Fix-include-path-in-exported-CMake-targets.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace bindings/python/CMakeLists.txt --replace " -u -r" ""
   '';
 
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
     "-DPY_MOD_INSTALL_DIR=${placeholder "py"}/${python3.sitePackages}/"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-faligned-allocation";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-faligned-allocation";
 
   meta = with lib; {
     description = "Zeek's Messaging Library";
diff --git a/pkgs/applications/networking/ids/zeek/default.nix b/pkgs/applications/networking/ids/zeek/default.nix
index e1ac462330c2..8286c46bcb48 100644
--- a/pkgs/applications/networking/ids/zeek/default.nix
+++ b/pkgs/applications/networking/ids/zeek/default.nix
@@ -58,9 +58,9 @@ stdenv.mkDerivation rec {
     openssl
     zlib
     python
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libkqueue
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gettext
   ];
 
@@ -78,11 +78,11 @@ stdenv.mkDerivation rec {
     "-DZEEK_STATE_DIR=/var/lib/zeek"
     "-DZEEK_SPOOL_DIR=/var/spool/zeek"
     "-DDISABLE_JAVASCRIPT=ON"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DLIBKQUEUE_ROOT_DIR=${libkqueue}"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-faligned-allocation";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-faligned-allocation";
 
   postInstall = ''
     for file in $out/share/zeek/base/frameworks/notice/actions/pp-alarms.zeek $out/share/zeek/base/frameworks/notice/main.zeek; do
diff --git a/pkgs/applications/networking/instant-messengers/caprine-bin/default.nix b/pkgs/applications/networking/instant-messengers/caprine-bin/default.nix
index cadfe432b297..f82ae2ac4220 100644
--- a/pkgs/applications/networking/instant-messengers/caprine-bin/default.nix
+++ b/pkgs/applications/networking/instant-messengers/caprine-bin/default.nix
@@ -18,7 +18,7 @@ let
     sha256 = "sha256-WMT4yrLjDSMsI/lFbYODu3/0whcF+++4ShoChfMyLfQ=";
   };
 in
-(if stdenvNoCC.isDarwin then x86_64-dmg else x86_64-appimage).overrideAttrs (oldAttrs: {
+(if stdenvNoCC.hostPlatform.isDarwin then x86_64-dmg else x86_64-appimage).overrideAttrs (oldAttrs: {
   passthru = (oldAttrs.passthru or { }) // { inherit x86_64-appimage x86_64-dmg; };
   meta = oldAttrs.meta // {
     platforms = x86_64-appimage.meta.platforms ++ x86_64-dmg.meta.platforms;
diff --git a/pkgs/applications/networking/instant-messengers/chatterino2/default.nix b/pkgs/applications/networking/instant-messengers/chatterino2/default.nix
index ca8a163fd566..be7862611f19 100644
--- a/pkgs/applications/networking/instant-messengers/chatterino2/default.nix
+++ b/pkgs/applications/networking/instant-messengers/chatterino2/default.nix
@@ -20,11 +20,11 @@ stdenv.mkDerivation rec {
     boost
     openssl
     libsecret
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qt6.qtwayland
   ];
   cmakeFlags = [ "-DBUILD_WITH_QT6=ON" ];
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p "$out/Applications"
     mv bin/chatterino.app "$out/Applications/"
   '' + ''
diff --git a/pkgs/applications/networking/instant-messengers/dino/default.nix b/pkgs/applications/networking/instant-messengers/dino/default.nix
index b818baa89930..dd5f8f54c745 100644
--- a/pkgs/applications/networking/instant-messengers/dino/default.nix
+++ b/pkgs/applications/networking/instant-messengers/dino/default.nix
@@ -94,7 +94,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # Undefined symbols for architecture arm64: "_gpg_strerror"
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-lgpg-error";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-lgpg-error";
 
   doCheck = true;
   checkPhase = ''
@@ -112,7 +112,7 @@ stdenv.mkDerivation (finalAttrs: {
   # will load
   #
   # See https://github.com/dino/dino/wiki/macOS
-  postFixup = lib.optionalString (stdenv.isDarwin) ''
+  postFixup = lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     cd "$out/lib/dino/plugins/"
     for f in *.dylib; do
       mv "$f" "$(basename "$f" .dylib).so"
diff --git a/pkgs/applications/networking/instant-messengers/discord/default.nix b/pkgs/applications/networking/instant-messengers/discord/default.nix
index d095b53185f9..939716d9b52d 100644
--- a/pkgs/applications/networking/instant-messengers/discord/default.nix
+++ b/pkgs/applications/networking/instant-messengers/discord/default.nix
@@ -1,7 +1,7 @@
 { branch ? "stable", callPackage, fetchurl, lib, stdenv }:
 let
   versions =
-    if stdenv.isLinux then {
+    if stdenv.hostPlatform.isLinux then {
       stable = "0.0.67";
       ptb = "0.0.105";
       canary = "0.0.492";
@@ -65,7 +65,7 @@ let
     mainProgram = "discord";
   };
   package =
-    if stdenv.isLinux
+    if stdenv.hostPlatform.isLinux
     then ./linux.nix
     else ./darwin.nix;
 
@@ -85,17 +85,17 @@ let
         };
         ptb = rec {
           pname = "discord-ptb";
-          binaryName = if stdenv.isLinux then "DiscordPTB" else desktopName;
+          binaryName = if stdenv.hostPlatform.isLinux then "DiscordPTB" else desktopName;
           desktopName = "Discord PTB";
         };
         canary = rec {
           pname = "discord-canary";
-          binaryName = if stdenv.isLinux then "DiscordCanary" else desktopName;
+          binaryName = if stdenv.hostPlatform.isLinux then "DiscordCanary" else desktopName;
           desktopName = "Discord Canary";
         };
         development = rec {
           pname = "discord-development";
-          binaryName = if stdenv.isLinux then "DiscordDevelopment" else desktopName;
+          binaryName = if stdenv.hostPlatform.isLinux then "DiscordDevelopment" else desktopName;
           desktopName = "Discord Development";
         };
       }
diff --git a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
index 37393681224b..fc40e11dca16 100644
--- a/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
+++ b/pkgs/applications/networking/instant-messengers/element/element-desktop.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: builtins.removeAttrs pinData [ "hashes" ] // {
   };
 
   nativeBuildInputs = [ yarn fixup-yarn-lock nodejs makeWrapper jq ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   inherit seshat;
 
@@ -125,7 +125,7 @@ stdenv.mkDerivation (finalAttrs: builtins.removeAttrs pinData [ "hashes" ] // {
     mimeTypes = [ "x-scheme-handler/element" ];
   };
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp build/icon.icns $out/Applications/Element.app/Contents/Resources/element.icns
   '';
 
diff --git a/pkgs/applications/networking/instant-messengers/element/keytar/default.nix b/pkgs/applications/networking/instant-messengers/element/keytar/default.nix
index 7d17d582762a..958a80fb4743 100644
--- a/pkgs/applications/networking/instant-messengers/element/keytar/default.nix
+++ b/pkgs/applications/networking/instant-messengers/element/keytar/default.nix
@@ -19,10 +19,10 @@ in stdenv.mkDerivation rec {
     nodejs python3 pkg-config
     npmHooks.npmConfigHook
   ]
-    ++ lib.optional  stdenv.isDarwin xcbuild;
+    ++ lib.optional  stdenv.hostPlatform.isDarwin xcbuild;
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ libsecret ]
-    ++ lib.optionals stdenv.isDarwin [ Security AppKit ];
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ libsecret ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security AppKit ];
 
   npmDeps = fetchNpmDeps {
     inherit src;
diff --git a/pkgs/applications/networking/instant-messengers/element/seshat/default.nix b/pkgs/applications/networking/instant-messengers/element/seshat/default.nix
index bc163fb50a89..e8e88491c2cc 100644
--- a/pkgs/applications/networking/instant-messengers/element/seshat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/element/seshat/default.nix
@@ -17,7 +17,7 @@ in rustPlatform.buildRustPackage rec {
   sourceRoot = "${src.name}/seshat-node/native";
 
   nativeBuildInputs = [ nodejs python3 yarn fixup-yarn-lock ];
-  buildInputs = [ sqlcipher ] ++ lib.optional stdenv.isDarwin CoreServices;
+  buildInputs = [ sqlcipher ] ++ lib.optional stdenv.hostPlatform.isDarwin CoreServices;
 
   npm_config_nodedir = nodejs;
 
diff --git a/pkgs/applications/networking/instant-messengers/freetalk/default.nix b/pkgs/applications/networking/instant-messengers/freetalk/default.nix
index e259c6b60f8d..b71395ad93bb 100644
--- a/pkgs/applications/networking/instant-messengers/freetalk/default.nix
+++ b/pkgs/applications/networking/instant-messengers/freetalk/default.nix
@@ -15,11 +15,11 @@ stdenv.mkDerivation rec {
   buildInputs = [
     guile glib loudmouth gmp libidn readline libtool
     libunwind ncurses curl jansson
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     argp-standalone
   ];
 
-  env.NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-largp";
+  env.NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-largp";
 
   meta = with lib; {
     description =  "Console XMPP client";
diff --git a/pkgs/applications/networking/instant-messengers/go-neb/default.nix b/pkgs/applications/networking/instant-messengers/go-neb/default.nix
index 82cfb3126c86..6b4528dfe289 100644
--- a/pkgs/applications/networking/instant-messengers/go-neb/default.nix
+++ b/pkgs/applications/networking/instant-messengers/go-neb/default.nix
@@ -21,7 +21,7 @@ buildGoModule {
   passthru.tests.go-neb = nixosTests.go-neb;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Extensible matrix bot written in Go";
     mainProgram = "go-neb";
     homepage = "https://github.com/matrix-org/go-neb";
diff --git a/pkgs/applications/networking/instant-messengers/gomuks/default.nix b/pkgs/applications/networking/instant-messengers/gomuks/default.nix
index 64b971b2353b..510f577a50e9 100644
--- a/pkgs/applications/networking/instant-messengers/gomuks/default.nix
+++ b/pkgs/applications/networking/instant-messengers/gomuks/default.nix
@@ -42,7 +42,7 @@ buildGoModule rec {
     }/* $out/
     substituteAllInPlace $out/share/applications/*
     wrapProgram $out/bin/gomuks \
-      --prefix PATH : "${lib.makeBinPath (lib.optionals stdenv.isLinux [ libnotify pulseaudio ])}" \
+      --prefix PATH : "${lib.makeBinPath (lib.optionals stdenv.hostPlatform.isLinux [ libnotify pulseaudio ])}" \
       --set-default GOMUKS_SOUND_NORMAL "${sound-theme-freedesktop}/share/sounds/freedesktop/stereo/message-new-instant.oga" \
       --set-default GOMUKS_SOUND_CRITICAL "${sound-theme-freedesktop}/share/sounds/freedesktop/stereo/complete.oga"
   '';
diff --git a/pkgs/applications/networking/instant-messengers/gurk-rs/default.nix b/pkgs/applications/networking/instant-messengers/gurk-rs/default.nix
index 7d934aabbc65..ae7001fe7bf9 100644
--- a/pkgs/applications/networking/instant-messengers/gurk-rs/default.nix
+++ b/pkgs/applications/networking/instant-messengers/gurk-rs/default.nix
@@ -38,9 +38,9 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ protobuf pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
-  NIX_LDFLAGS = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ "-framework" "AppKit" ];
+  NIX_LDFLAGS = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ "-framework" "AppKit" ];
 
   PROTOC = "${pkgsBuildHost.protobuf}/bin/protoc";
 
diff --git a/pkgs/applications/networking/instant-messengers/iamb/default.nix b/pkgs/applications/networking/instant-messengers/iamb/default.nix
index 655a20c12ac6..02a632a9f4b1 100644
--- a/pkgs/applications/networking/instant-messengers/iamb/default.nix
+++ b/pkgs/applications/networking/instant-messengers/iamb/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-a5y8nNFixOxJPNDOzvFFRqVrY2jsirCud2ZJJ8OvRhQ=";
 
   nativeBuildInputs = [ installShellFiles ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Cocoa
   ];
diff --git a/pkgs/applications/networking/instant-messengers/jami/default.nix b/pkgs/applications/networking/instant-messengers/jami/default.nix
index 313d45a98239..a3df5958beb6 100644
--- a/pkgs/applications/networking/instant-messengers/jami/default.nix
+++ b/pkgs/applications/networking/instant-messengers/jami/default.nix
@@ -110,7 +110,7 @@ stdenv.mkDerivation rec {
       "--disable-resample"
       "--disable-libwebrtc"
       "--with-gnutls=yes"
-    ] ++ lib.optionals stdenv.isLinux [ "--enable-epoll" ];
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "--enable-epoll" ];
 
     buildInputs = old.buildInputs ++ [ gnutls ];
   });
diff --git a/pkgs/applications/networking/instant-messengers/jitsi-meet-electron/default.nix b/pkgs/applications/networking/instant-messengers/jitsi-meet-electron/default.nix
index 88b9baeacf26..619759df2f00 100644
--- a/pkgs/applications/networking/instant-messengers/jitsi-meet-electron/default.nix
+++ b/pkgs/applications/networking/instant-messengers/jitsi-meet-electron/default.nix
@@ -30,18 +30,18 @@ buildNpmPackage rec {
 
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     copyDesktopItems
   ];
 
   # robotjs node-gyp dependencies
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libpng
     libX11
     libXi
     libXtst
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
     CoreFoundation
     ApplicationServices
@@ -84,7 +84,7 @@ buildNpmPackage rec {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/share/jitsi-meet-electron
       cp -r dist/*-unpacked/{locales,resources{,.pak}} $out/share/jitsi-meet-electron
 
@@ -97,7 +97,7 @@ buildNpmPackage rec {
       install -Dm644 resources/icons/512x512.png $out/share/icons/hicolor/512x512/apps/jitsi-meet-electron.png
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r dist/mac*/"Jitsi Meet.app" $out/Applications
       makeWrapper "$out/Applications/Jitsi Meet.app/Contents/MacOS/Jitsi Meet" $out/bin/jitsi-meet-electron
diff --git a/pkgs/applications/networking/instant-messengers/mikutter/default.nix b/pkgs/applications/networking/instant-messengers/mikutter/default.nix
index 3938d03447f8..eeb5f582f25c 100644
--- a/pkgs/applications/networking/instant-messengers/mikutter/default.nix
+++ b/pkgs/applications/networking/instant-messengers/mikutter/default.nix
@@ -79,18 +79,18 @@ with mikutterPaths; stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ copyDesktopItems wrapGAppsHook3 gobject-introspection ]
-    ++ lib.optionals stdenv.isDarwin [ libicns ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libicns ];
   buildInputs = [
     atk
     gtk2
     libnotify
     which # some plugins use it at runtime
     wrappedRuby
-  ] ++ lib.optionals stdenv.isLinux [ alsa-utils ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-utils ];
 
   scriptPath = lib.makeBinPath (
     [ wrappedRuby libnotify which ]
-    ++ lib.optionals stdenv.isLinux [ alsa-utils ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-utils ]
   );
 
   postUnpack = ''
@@ -123,7 +123,7 @@ with mikutterPaths; stdenv.mkDerivation rec {
     let
       infoPlist = mkInfoPlist { inherit version; };
     in
-    lib.optionalString stdenv.isDarwin ''
+    lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p ${appBinDir} ${appResourceDir}
       install -Dm644 ${infoPlist} ${appPrefixDir}/Info.plist
       ln -s $out/bin/mikutter ${appBinDir}/mikutter
diff --git a/pkgs/applications/networking/instant-messengers/nchat/default.nix b/pkgs/applications/networking/instant-messengers/nchat/default.nix
index 0e3c7f6803fb..b9183b2d7645 100644
--- a/pkgs/applications/networking/instant-messengers/nchat/default.nix
+++ b/pkgs/applications/networking/instant-messengers/nchat/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     readline
     sqlite
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ AppKit Cocoa Foundation ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit Cocoa Foundation ];
 
   cmakeFlags = [
     "-DHAS_WHATSAPP=OFF" # go module build required
diff --git a/pkgs/applications/networking/instant-messengers/pantalaimon/default.nix b/pkgs/applications/networking/instant-messengers/pantalaimon/default.nix
index 3255b99cf706..8a6391892ae4 100644
--- a/pkgs/applications/networking/instant-messengers/pantalaimon/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pantalaimon/default.nix
@@ -71,7 +71,7 @@ python3Packages.buildPythonApplication rec {
   ];
 
   # darwin has difficulty communicating with server, fails some integration tests
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postInstall = ''
     installManPage docs/man/*.[1-9]
diff --git a/pkgs/applications/networking/instant-messengers/pidgin/default.nix b/pkgs/applications/networking/instant-messengers/pidgin/default.nix
index 9300a73b175d..c2c8f98251b6 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin/default.nix
@@ -79,14 +79,14 @@ let
     ]
     ++ lib.optional withOpenssl openssl
     ++ lib.optionals withGnutls [ gnutls libgcrypt ]
-    ++ lib.optionals stdenv.isLinux [ gtk2 gtkspell2 farstream ]
-    ++ lib.optional stdenv.isDarwin gtk2-x11;
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ gtk2 gtkspell2 farstream ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin gtk2-x11;
 
 
     propagatedBuildInputs = [ pkg-config gettext ]
       ++ (with perlPackages; [ perl XMLParser ])
-      ++ lib.optional stdenv.isLinux gtk2
-      ++ lib.optional stdenv.isDarwin gtk2-x11;
+      ++ lib.optional stdenv.hostPlatform.isLinux gtk2
+      ++ lib.optional stdenv.hostPlatform.isDarwin gtk2-x11;
 
     patches = [
       ./add-search-path.patch
@@ -107,7 +107,7 @@ let
     ]
     ++ lib.optionals withCyrus_sasl [ "--enable-cyrus-sasl=yes" ]
     ++ lib.optionals withGnutls [ "--enable-gnutls=yes" "--enable-nss=no" ]
-    ++ lib.optionals stdenv.isDarwin [ "--disable-gtkspell" "--disable-vv" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--disable-gtkspell" "--disable-vv" ]
     ++ lib.optionals stdenv.cc.isClang [ "CFLAGS=-Wno-error=int-conversion" ];
 
     enableParallelBuilding = true;
@@ -121,7 +121,7 @@ let
     # In particular, this detects missing python imports in some of the tools.
     postFixup = let
       # TODO: python is a script, so it doesn't work as interpreter on darwin
-      binsToTest = lib.optionalString stdenv.isLinux "purple-remote," + "pidgin,finch";
+      binsToTest = lib.optionalString stdenv.hostPlatform.isLinux "purple-remote," + "pidgin,finch";
     in lib.optionalString doInstallCheck ''
       for f in "''${!outputBin}"/bin/{${binsToTest}}; do
         echo "Testing: $f --help"
diff --git a/pkgs/applications/networking/instant-messengers/pidgin/pidgin-plugins/tdlib-purple/default.nix b/pkgs/applications/networking/instant-messengers/pidgin/pidgin-plugins/tdlib-purple/default.nix
index 1a1fd3b409a6..26c67b070e5e 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin/pidgin-plugins/tdlib-purple/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin/pidgin-plugins/tdlib-purple/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [ "-DNoVoip=True" ]; # libtgvoip required
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ "-U__ARM_NEON__" ]);
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ "-U__ARM_NEON__" ]);
 
   meta = with lib; {
     homepage = "https://github.com/ars3niy/tdlib-purple";
diff --git a/pkgs/applications/networking/instant-messengers/qtox/default.nix b/pkgs/applications/networking/instant-messengers/qtox/default.nix
index 09240ae4713b..84b24dab2de7 100644
--- a/pkgs/applications/networking/instant-messengers/qtox/default.nix
+++ b/pkgs/applications/networking/instant-messengers/qtox/default.nix
@@ -53,10 +53,10 @@ mkDerivation rec {
     pcre
     qrencode
     sqlcipher
-  ] ++ lib.optionals stdenv.isDarwin [ AVFoundation ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AVFoundation ];
 
   nativeBuildInputs = [ cmake pkg-config qttools ]
-    ++ lib.optionals stdenv.isDarwin [ perl ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ perl ];
 
   cmakeFlags = [
     "-DGIT_DESCRIBE=v${version}"
@@ -67,7 +67,7 @@ mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Qt Tox client";
     mainProgram = "qtox";
     homepage = "https://tox.chat";
diff --git a/pkgs/applications/networking/instant-messengers/quaternion/default.nix b/pkgs/applications/networking/instant-messengers/quaternion/default.nix
index 2a0bfce75631..ef6bc08616c5 100644
--- a/pkgs/applications/networking/instant-messengers/quaternion/default.nix
+++ b/pkgs/applications/networking/instant-messengers/quaternion/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   postInstall =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       mkdir -p $out/Applications
       mv $out/bin/quaternion.app $out/Applications
       rmdir $out/bin || :
diff --git a/pkgs/applications/networking/instant-messengers/signal-cli/default.nix b/pkgs/applications/networking/instant-messengers/signal-cli/default.nix
index 17aef03835bd..d20ef1f1817e 100644
--- a/pkgs/applications/networking/instant-messengers/signal-cli/default.nix
+++ b/pkgs/applications/networking/instant-messengers/signal-cli/default.nix
@@ -10,14 +10,14 @@ stdenv.mkDerivation rec {
     hash = "sha256-OTKXLcLktWiSdRhGe7ioL2ViJQQcCjR1+2LlGoMnSgE=";
   };
 
-  buildInputs = lib.optionals stdenv.isLinux [ libmatthew_java dbus dbus_java ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libmatthew_java dbus dbus_java ];
   nativeBuildInputs = [ makeWrapper ];
 
   installPhase = ''
     mkdir -p $out/bin
     cp -r lib $out/lib
     cp bin/signal-cli $out/bin/signal-cli
-  '' + (if stdenv.isLinux then ''
+  '' + (if stdenv.hostPlatform.isLinux then ''
     makeWrapper ${openjdk21_headless}/bin/java $out/bin/signal-cli \
       --set JAVA_HOME "${openjdk21_headless}" \
       --add-flags "-classpath '$out/lib/*:${libmatthew_java}/lib/jni'" \
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   #         /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa: file system sandbox blocked stat()
   #         /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa: file system sandbox blocked stat()
   # /nix/store/in41dz8byyyz4c0w132l7mqi43liv4yr-stdenv-darwin/setup: line 1310:  2231 Abort trap: 6           signal-cli --version
-  doInstallCheck = stdenv.isLinux;
+  doInstallCheck = stdenv.hostPlatform.isLinux;
 
   installCheckPhase = ''
     export PATH=$PATH:$out/bin
diff --git a/pkgs/applications/networking/instant-messengers/signalbackup-tools/default.nix b/pkgs/applications/networking/instant-messengers/signalbackup-tools/default.nix
index 7e381c1205f5..a6a6fe89aadd 100644
--- a/pkgs/applications/networking/instant-messengers/signalbackup-tools/default.nix
+++ b/pkgs/applications/networking/instant-messengers/signalbackup-tools/default.nix
@@ -25,16 +25,16 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
   buildInputs = [
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     dbus
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Security
   ];
 
diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index 125691639586..9359480b0efb 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -207,6 +207,6 @@ let
     '';
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/applications/networking/instant-messengers/teamspeak/server.nix b/pkgs/applications/networking/instant-messengers/teamspeak/server.nix
index 577589f6a40b..f77da2638c3d 100644
--- a/pkgs/applications/networking/instant-messengers/teamspeak/server.nix
+++ b/pkgs/applications/networking/instant-messengers/teamspeak/server.nix
@@ -1,14 +1,14 @@
 { lib, stdenv, fetchurl, postgresql, autoPatchelfHook, writeScript }:
 
 let
-  arch = if stdenv.is64bit then "amd64" else "x86";
+  arch = if stdenv.hostPlatform.is64bit then "amd64" else "x86";
 in stdenv.mkDerivation rec {
   pname = "teamspeak-server";
   version = "3.13.7";
 
   src = fetchurl {
     url = "https://files.teamspeak-services.com/releases/server/${version}/teamspeak3-server_linux_${arch}-${version}.tar.bz2";
-    sha256 = if stdenv.is64bit
+    sha256 = if stdenv.hostPlatform.is64bit
       then "sha256-d1pXMamAmAHkyPkGbNm8ViobNoVTE5wSSfKgdA1QBB4="
       else "sha256-aMEDOnvBeKfzG8lDFhU8I5DYgG53IsCDBMV2MUyJi2g=";
   };
diff --git a/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/default.nix
index b19e3efa8ac7..102500c1c41b 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/default.nix
@@ -42,7 +42,7 @@ let
     inherit stdenv;
   };
 
-  mainProgram = if stdenv.isLinux then "kotatogram-desktop" else "Kotatogram";
+  mainProgram = if stdenv.hostPlatform.isLinux then "kotatogram-desktop" else "Kotatogram";
 in
 stdenv.mkDerivation rec {
   pname = "kotatogram-desktop";
@@ -61,20 +61,20 @@ stdenv.mkDerivation rec {
     ./macos-opengl.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace Telegram/ThirdParty/libtgvoip/os/linux/AudioInputALSA.cpp \
       --replace-fail '"libasound.so.2"' '"${alsa-lib}/lib/libasound.so.2"'
     substituteInPlace Telegram/ThirdParty/libtgvoip/os/linux/AudioOutputALSA.cpp \
       --replace-fail '"libasound.so.2"' '"${alsa-lib}/lib/libasound.so.2"'
     substituteInPlace Telegram/ThirdParty/libtgvoip/os/linux/AudioPulse.cpp \
       --replace-fail '"libpulse.so.0"' '"${libpulseaudio}/lib/libpulse.so.0"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Telegram/lib_webrtc/webrtc/platform/mac/webrtc_environment_mac.mm \
       --replace-fail kAudioObjectPropertyElementMain kAudioObjectPropertyElementMaster
   '';
 
   # Wrapping the inside of the app bundles, avoiding double-wrapping
-  dontWrapQtApps = stdenv.isDarwin;
+  dontWrapQtApps = stdenv.hostPlatform.isDarwin;
 
   nativeBuildInputs = [
     pkg-config
@@ -83,11 +83,11 @@ stdenv.mkDerivation rec {
     python3
     wrapQtAppsHook
     removeReferencesTo
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     # to build bundled libdispatch
     clang
     gobject-introspection
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     lld
   ];
 
@@ -107,7 +107,7 @@ stdenv.mkDerivation rec {
     tg_owt
     microsoft-gsl
     boost
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
     kcoreaddons
     alsa-lib
@@ -115,7 +115,7 @@ stdenv.mkDerivation rec {
     hunspell
     jemalloc
     wayland
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
     Cocoa
     CoreFoundation
     CoreServices
@@ -152,7 +152,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_LINK = "-fuse-ld=lld";
   };
 
@@ -160,7 +160,7 @@ stdenv.mkDerivation rec {
     "-DTDESKTOP_API_TEST=ON"
   ];
 
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -r ${mainProgram}.app $out/Applications
     ln -s $out/{Applications/${mainProgram}.app/Contents/MacOS,bin}
@@ -172,7 +172,7 @@ stdenv.mkDerivation rec {
     remove-references-to -t ${tg_owt.dev} $out/bin/${mainProgram}
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     wrapQtApp $out/Applications/${mainProgram}.app/Contents/MacOS/${mainProgram}
   '';
 
diff --git a/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix b/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix
index e2f3c4ba884e..c136d121aa86 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/kotatogram-desktop/tg_owt.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
     fetchSubmodules = true;
   };
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace src/modules/desktop_capture/linux/wayland/egl_dmabuf.cc \
       --replace '"libEGL.so.1"' '"${libGL}/lib/libEGL.so.1"' \
       --replace '"libGL.so.1"' '"${libGL}/lib/libGL.so.1"' \
@@ -64,7 +64,7 @@ stdenv.mkDerivation {
     crc32c
     libvpx
     abseil-cpp
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
     libXtst
     libXcomposite
@@ -78,7 +78,7 @@ stdenv.mkDerivation {
     mesa
     libdrm
     libGL
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Cocoa
     AppKit
     IOKit
diff --git a/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/default.nix b/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/default.nix
index 6aefc520c7e9..e3e8a3b3f6eb 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/telegram-desktop/default.nix
@@ -81,7 +81,7 @@ stdenv.mkDerivation (finalAttrs: {
     ./scheme.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace Telegram/ThirdParty/libtgvoip/os/linux/AudioInputALSA.cpp \
       --replace-fail '"libasound.so.2"' '"${alsa-lib}/lib/libasound.so.2"'
     substituteInPlace Telegram/ThirdParty/libtgvoip/os/linux/AudioOutputALSA.cpp \
@@ -90,7 +90,7 @@ stdenv.mkDerivation (finalAttrs: {
       --replace-fail '"libpulse.so.0"' '"${libpulseaudio}/lib/libpulse.so.0"'
     substituteInPlace Telegram/lib_webview/webview/platform/linux/webview_linux_webkitgtk_library.cpp \
       --replace-fail '"libwebkitgtk-6.0.so.4"' '"${webkitgtk_6_0}/lib/libwebkitgtk-6.0.so.4"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Telegram/lib_webrtc/webrtc/platform/mac/webrtc_environment_mac.mm \
       --replace-fail kAudioObjectPropertyElementMain kAudioObjectPropertyElementMaster
   '';
@@ -105,11 +105,11 @@ stdenv.mkDerivation (finalAttrs: {
     ninja
     python3
     wrapQtAppsHook
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     gobject-introspection
     wrapGAppsHook3
     extra-cmake-modules
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     lld
   ];
 
@@ -132,7 +132,7 @@ stdenv.mkDerivation (finalAttrs: {
     microsoft-gsl
     rlottie
     ada
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
     gtk3
     glib-networking
@@ -144,7 +144,7 @@ stdenv.mkDerivation (finalAttrs: {
     hunspell
     webkitgtk_6_0
     jemalloc
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
     Cocoa
     CoreFoundation
     CoreServices
@@ -180,7 +180,7 @@ stdenv.mkDerivation (finalAttrs: {
     libicns
   ]);
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_LINK = "-fuse-ld=lld";
   };
 
@@ -198,20 +198,20 @@ stdenv.mkDerivation (finalAttrs: {
     export GI_GIR_PATH="$XDG_DATA_DIRS"
   '';
 
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -r ${finalAttrs.meta.mainProgram}.app $out/Applications
     ln -s $out/{Applications/${finalAttrs.meta.mainProgram}.app/Contents/MacOS,bin}
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     # This is necessary to run Telegram in a pure environment.
     # We also use gappsWrapperArgs from wrapGAppsHook.
     wrapProgram $out/bin/${finalAttrs.meta.mainProgram} \
       "''${gappsWrapperArgs[@]}" \
       "''${qtWrapperArgs[@]}" \
       --suffix PATH : ${lib.makeBinPath [ xdg-utils ]}
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     wrapQtApp $out/Applications/${finalAttrs.meta.mainProgram}.app/Contents/MacOS/${finalAttrs.meta.mainProgram}
   '';
 
diff --git a/pkgs/applications/networking/instant-messengers/telegram/tg/default.nix b/pkgs/applications/networking/instant-messengers/telegram/tg/default.nix
index 7cdbda355d38..d23ee405efc2 100644
--- a/pkgs/applications/networking/instant-messengers/telegram/tg/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telegram/tg/default.nix
@@ -30,7 +30,7 @@ buildPythonApplication rec {
   ];
 
   # Fix notifications on platforms other than darwin by providing notify-send
-  postPatch = lib.optionalString (!stdenv.isDarwin) ''
+  postPatch = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     sed -i 's|^NOTIFY_CMD = .*|NOTIFY_CMD = "${libnotify}/bin/notify-send {title} {message} -i {icon_path}"|' tg/config.py
   '';
 
diff --git a/pkgs/applications/networking/instant-messengers/telepathy/logger/default.nix b/pkgs/applications/networking/instant-messengers/telepathy/logger/default.nix
index 4054219850b4..70612f529434 100644
--- a/pkgs/applications/networking/instant-messengers/telepathy/logger/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telepathy/logger/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     dbus-glib libxml2 sqlite telepathy-glib
     dbus
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Foundation
   ];
diff --git a/pkgs/applications/networking/instant-messengers/telepathy/mission-control/default.nix b/pkgs/applications/networking/instant-messengers/telepathy/mission-control/default.nix
index 92daa59ae415..5d4bfc5eab4b 100644
--- a/pkgs/applications/networking/instant-messengers/telepathy/mission-control/default.nix
+++ b/pkgs/applications/networking/instant-messengers/telepathy/mission-control/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     pkg-config
     libxslt
     makeWrapper
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     autoreconfHook
     gtk-doc
   ];
diff --git a/pkgs/applications/networking/instant-messengers/tensor/default.nix b/pkgs/applications/networking/instant-messengers/tensor/default.nix
index e90b8b697130..2a42692e412c 100644
--- a/pkgs/applications/networking/instant-messengers/tensor/default.nix
+++ b/pkgs/applications/networking/instant-messengers/tensor/default.nix
@@ -37,7 +37,7 @@ mkDerivation rec {
     mimeTypes = [ "application/x-chat" ];
   };
 
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     runHook preInstall
 
     mkdir -p $out/Applications
diff --git a/pkgs/applications/networking/instant-messengers/twitch-tui/default.nix b/pkgs/applications/networking/instant-messengers/twitch-tui/default.nix
index 31ef96cf80c6..8d3b36071874 100644
--- a/pkgs/applications/networking/instant-messengers/twitch-tui/default.nix
+++ b/pkgs/applications/networking/instant-messengers/twitch-tui/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     Security
     SystemConfiguration
diff --git a/pkgs/applications/networking/instant-messengers/vk-messenger/default.nix b/pkgs/applications/networking/instant-messengers/vk-messenger/default.nix
index 50be0777ae4e..60ed9d60b1e1 100644
--- a/pkgs/applications/networking/instant-messengers/vk-messenger/default.nix
+++ b/pkgs/applications/networking/instant-messengers/vk-messenger/default.nix
@@ -71,4 +71,4 @@ let
       cp -r *.app $out/Applications
     '';
   };
-in if stdenv.isDarwin then darwin else linux
+in if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix b/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
index 9d41b0455a72..22bf7fb11e6c 100644
--- a/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
@@ -187,6 +187,6 @@ let
   };
 
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/applications/networking/irc/communi/default.nix b/pkgs/applications/networking/irc/communi/default.nix
index 84940c288bed..9c25ece8556b 100644
--- a/pkgs/applications/networking/irc/communi/default.nix
+++ b/pkgs/applications/networking/irc/communi/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   # libCommuni.dylib is installed in $out/Applications/Communi.app/Contents/Frameworks/ on Darwin
   # Wrapper hook thinks it's a binary because it's in $out/Applications, wraps it with a shell script
   # So we manually call the wrapper script on just the binary
-  dontWrapQtApps = stdenv.isDarwin;
+  dontWrapQtApps = stdenv.hostPlatform.isDarwin;
 
   preConfigure = ''
     export QMAKEFEATURES=${libcommuni}/features
@@ -47,11 +47,11 @@ stdenv.mkDerivation rec {
     "COMMUNI_INSTALL_ICONS=${placeholder "out"}/share/icons/hicolor"
     "COMMUNI_INSTALL_DESKTOP=${placeholder "out"}/share/applications"
     "COMMUNI_INSTALL_THEMES=${placeholder "out"}/share/communi/themes"
-    "COMMUNI_INSTALL_BINS=${placeholder "out"}/${if stdenv.isDarwin then "Applications" else "bin"}"
+    "COMMUNI_INSTALL_BINS=${placeholder "out"}/${if stdenv.hostPlatform.isDarwin then "Applications" else "bin"}"
   ];
 
   postInstall =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       # Nix qmake does not add the bundle rpath by default.
       install_name_tool \
         -add_rpath @executable_path/../Frameworks \
diff --git a/pkgs/applications/networking/irc/convos/default.nix b/pkgs/applications/networking/irc/convos/default.nix
index 2fc2e0585910..c456875d016b 100644
--- a/pkgs/applications/networking/irc/convos/default.nix
+++ b/pkgs/applications/networking/irc/convos/default.nix
@@ -14,7 +14,7 @@ perlPackages.buildPerlPackage rec {
   };
 
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optionals stdenv.isDarwin [ shortenPerlShebang ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ shortenPerlShebang ];
 
   buildInputs = with perlPackages; [
     CryptPassphrase CryptPassphraseArgon2 CryptPassphraseBcrypt
@@ -79,7 +79,7 @@ perlPackages.buildPerlPackage rec {
     ln -s $AUTO_SHARE_PATH/public/assets $out/assets
     cp -vR templates $out/templates
     cp Makefile.PL $out/Makefile.PL
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/convos
   '' + ''
     wrapProgram $out/bin/convos --set MOJO_HOME $out
diff --git a/pkgs/applications/networking/irc/epic5/default.nix b/pkgs/applications/networking/irc/epic5/default.nix
index 2331eaa4596d..c3a10cc39e9d 100644
--- a/pkgs/applications/networking/irc/epic5/default.nix
+++ b/pkgs/applications/networking/irc/epic5/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   # Darwin needs libiconv, tcl; while Linux build don't
   buildInputs = [ openssl ncurses libxcrypt ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv tcl ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv tcl ];
 
   patches = [
     (fetchpatch {
diff --git a/pkgs/applications/networking/irc/thelounge/default.nix b/pkgs/applications/networking/irc/thelounge/default.nix
index 729afb831d57..0abeec15939f 100644
--- a/pkgs/applications/networking/irc/thelounge/default.nix
+++ b/pkgs/applications/networking/irc/thelounge/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-MM6SgVT7Pjdu96A4eWRucEzT7uNPxBqUDgHKl8mH2C0=";
   };
 
-  nativeBuildInputs = [ nodejs yarn fixup-yarn-lock python3 npmHooks.npmInstallHook ] ++ lib.optional stdenv.isDarwin cctools;
+  nativeBuildInputs = [ nodejs yarn fixup-yarn-lock python3 npmHooks.npmInstallHook ] ++ lib.optional stdenv.hostPlatform.isDarwin cctools;
   buildInputs = [ sqlite ];
 
   configurePhase = ''
diff --git a/pkgs/applications/networking/irc/tiny/default.nix b/pkgs/applications/networking/irc/tiny/default.nix
index 583723c0d147..fa8f3edf5ad6 100644
--- a/pkgs/applications/networking/irc/tiny/default.nix
+++ b/pkgs/applications/networking/irc/tiny/default.nix
@@ -4,10 +4,10 @@
 , fetchFromGitHub
 , pkg-config
 , Foundation
-, dbusSupport ? stdenv.isLinux, dbus
+, dbusSupport ? stdenv.hostPlatform.isLinux, dbus
 # rustls will be used for TLS if useOpenSSL=false
-, useOpenSSL ? stdenv.isLinux, openssl
-, notificationSupport ? stdenv.isLinux
+, useOpenSSL ? stdenv.hostPlatform.isLinux, openssl
+, notificationSupport ? stdenv.hostPlatform.isLinux
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -23,10 +23,10 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-AhQCfLCoJU7o8s+XL3hDOPmZi9QjOxXSA9uglA1KSuY=";
 
-  nativeBuildInputs = lib.optional stdenv.isLinux pkg-config;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isLinux pkg-config;
   buildInputs = lib.optionals dbusSupport [ dbus ]
                 ++ lib.optionals useOpenSSL [ openssl ]
-                ++ lib.optional stdenv.isDarwin Foundation;
+                ++ lib.optional stdenv.hostPlatform.isDarwin Foundation;
 
   buildFeatures = lib.optional notificationSupport "desktop-notifications";
 
diff --git a/pkgs/applications/networking/irc/weechat/default.nix b/pkgs/applications/networking/irc/weechat/default.nix
index 42090534bcc3..8ac356b9183b 100644
--- a/pkgs/applications/networking/irc/weechat/default.nix
+++ b/pkgs/applications/networking/irc/weechat/default.nix
@@ -3,14 +3,14 @@
 , zlib, curl, pkg-config, libgcrypt
 , cmake, libobjc, libresolv, libiconv
 , asciidoctor # manpages
-, enableTests ? !stdenv.isDarwin, cpputest
+, enableTests ? !stdenv.hostPlatform.isDarwin, cpputest
 , guileSupport ? true, guile
 , luaSupport ? true, lua5
 , perlSupport ? true, perl
 , pythonSupport ? true, python3Packages
 , rubySupport ? true, ruby
 , tclSupport ? true, tcl
-, phpSupport ? !stdenv.isDarwin, php, systemd, libxml2, pcre2, libargon2
+, phpSupport ? !stdenv.hostPlatform.isDarwin, php, systemd, libxml2, pcre2, libargon2
 , extraBuildInputs ? []
 }:
 
@@ -29,7 +29,7 @@ let
     { name = "python"; enabled = pythonSupport; cmakeFlag = "ENABLE_PYTHON3"; buildInputs = [ python ]; }
     { name = "php"; enabled = phpSupport; cmakeFlag = "ENABLE_PHP"; buildInputs = [
       php-embed.unwrapped.dev libxml2 pcre2 libargon2
-    ] ++ lib.optional stdenv.isLinux systemd; }
+    ] ++ lib.optional stdenv.hostPlatform.isLinux systemd; }
   ];
   enabledPlugins = builtins.filter (p: p.enabled) plugins;
 
@@ -57,19 +57,19 @@ let
         "-DENABLE_DOC_INCOMPLETE=ON"
         "-DENABLE_TESTS=${if enableTests then "ON" else "OFF"}"
       ]
-        ++ lib.optionals stdenv.isDarwin ["-DICONV_LIBRARY=${libiconv}/lib/libiconv.dylib"]
+        ++ lib.optionals stdenv.hostPlatform.isDarwin ["-DICONV_LIBRARY=${libiconv}/lib/libiconv.dylib"]
         ++ map (p: "-D${p.cmakeFlag}=" + (if p.enabled then "ON" else "OFF")) plugins
         ;
 
       nativeBuildInputs = [ cmake pkg-config asciidoctor ] ++ lib.optional enableTests cpputest;
       buildInputs = [ ncurses openssl aspell cjson gnutls gettext zlib curl libgcrypt ]
-        ++ lib.optionals stdenv.isDarwin [ libobjc libresolv ]
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc libresolv ]
         ++ lib.concatMap (p: p.buildInputs) enabledPlugins
         ++ extraBuildInputs;
 
       env.NIX_CFLAGS_COMPILE = "-I${python}/include/${python.libPrefix}"
         # Fix '_res_9_init: undefined symbol' error
-        + (lib.optionalString stdenv.isDarwin "-DBIND_8_COMPAT=1 -lresolv");
+        + (lib.optionalString stdenv.hostPlatform.isDarwin "-DBIND_8_COMPAT=1 -lresolv");
 
       postInstall = ''
         for p in ${lib.concatMapStringsSep " " (p: p.name) enabledPlugins}; do
diff --git a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix-bridge/default.nix b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix-bridge/default.nix
index e51e6f061b07..22eb0849cc4a 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix-bridge/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix-bridge/default.nix
@@ -46,6 +46,6 @@ stdenv.mkDerivation {
 
     # As of 2019-06-30, all of the dependencies are available on macOS but the
     # package itself does not build.
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/networking/irc/wraith/default.nix b/pkgs/applications/networking/irc/wraith/default.nix
index c059babffe7b..c046a0c2d7f9 100644
--- a/pkgs/applications/networking/irc/wraith/default.nix
+++ b/pkgs/applications/networking/irc/wraith/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "IRC channel management bot written purely in C/C++";
     longDescription = ''
       Wraith is an IRC channel management bot written purely in C/C++. It has
diff --git a/pkgs/applications/networking/iroh/default.nix b/pkgs/applications/networking/iroh/default.nix
index e3cd1999d81b..ba87e0f29364 100644
--- a/pkgs/applications/networking/iroh/default.nix
+++ b/pkgs/applications/networking/iroh/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-t1re2vpxGZkC45n0jUytqe2SPAC/+fh4Itq1h9znYnM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks; [
       Security
       SystemConfiguration
diff --git a/pkgs/applications/networking/kubo-migrator/all-migrations.nix b/pkgs/applications/networking/kubo-migrator/all-migrations.nix
index 54ae2551caa3..d44fafb3be9e 100644
--- a/pkgs/applications/networking/kubo-migrator/all-migrations.nix
+++ b/pkgs/applications/networking/kubo-migrator/all-migrations.nix
@@ -63,7 +63,7 @@ let
     fs-repo-9-to-10
     fs-repo-8-to-9
     fs-repo-7-to-8
-  ] ++ lib.optional (!stdenv.isDarwin) # I didn't manage to fix this on macOS:
+  ] ++ lib.optional (!stdenv.hostPlatform.isDarwin) # I didn't manage to fix this on macOS:
     fs-repo-6-to-7                     # gx/ipfs/QmSGRM5Udmy1jsFBr1Cawez7Lt7LZ3ZKA23GGVEsiEW6F3/eventfd/eventfd.go:27:32: undefined: syscall.SYS_EVENTFD2
   ++ [
     fs-repo-5-to-6
diff --git a/pkgs/applications/networking/mailreaders/claws-mail/default.nix b/pkgs/applications/networking/mailreaders/claws-mail/default.nix
index ddc47d1800c3..d0345f946600 100644
--- a/pkgs/applications/networking/mailreaders/claws-mail/default.nix
+++ b/pkgs/applications/networking/mailreaders/claws-mail/default.nix
@@ -18,7 +18,7 @@
 , enableLdap ? true, openldap
 , enableNetworkManager ? true, networkmanager
 , enableLibetpan ? true, libetpan
-, enableValgrind ? !stdenv.isDarwin && lib.meta.availableOn stdenv.hostPlatform valgrind, valgrind
+, enableValgrind ? !stdenv.hostPlatform.isDarwin && lib.meta.availableOn stdenv.hostPlatform valgrind, valgrind
 , enableSvg ? true, librsvg
 
 # Configure claws-mail's plugins
diff --git a/pkgs/applications/networking/mailreaders/mmh/default.nix b/pkgs/applications/networking/mailreaders/mmh/default.nix
index 95c101002e2b..edcc48386a11 100644
--- a/pkgs/applications/networking/mailreaders/mmh/default.nix
+++ b/pkgs/applications/networking/mailreaders/mmh/default.nix
@@ -23,7 +23,7 @@ in stdenv.mkDerivation rec {
     homepage = "http://marmaro.de/prog/mmh";
     license = licenses.bsd3;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ kaction ];
   };
 }
diff --git a/pkgs/applications/networking/mailreaders/sylpheed/default.nix b/pkgs/applications/networking/mailreaders/sylpheed/default.nix
index 48d14d78d8e1..9e765743dd63 100644
--- a/pkgs/applications/networking/mailreaders/sylpheed/default.nix
+++ b/pkgs/applications/networking/mailreaders/sylpheed/default.nix
@@ -33,13 +33,13 @@ stdenv.mkDerivation rec {
   buildInputs = [ gtk2 ]
     ++ lib.optionals gpgSupport [ gpgme ]
     ++ lib.optionals sslSupport [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Foundation ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   configureFlags = lib.optional gpgSupport "--enable-gpgme"
     ++ lib.optional sslSupport "--enable-ssl";
 
   # Undefined symbols for architecture arm64: "_OBJC_CLASS_$_NSAutoreleasePool"
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework Foundation";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework Foundation";
 
   meta = with lib; {
     homepage = "https://sylpheed.sraoss.jp/en/";
diff --git a/pkgs/applications/networking/mhost/default.nix b/pkgs/applications/networking/mhost/default.nix
index 435f58d06850..777ea44dc7bd 100644
--- a/pkgs/applications/networking/mhost/default.nix
+++ b/pkgs/applications/networking/mhost/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-d2JYT/eJaGm8pfmjsuSZiQxlzcsypFH53F/9joW0J6I=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/applications/networking/mkchromecast/default.nix b/pkgs/applications/networking/mkchromecast/default.nix
index f6364f5ba572..b0df1210b318 100644
--- a/pkgs/applications/networking/mkchromecast/default.nix
+++ b/pkgs/applications/networking/mkchromecast/default.nix
@@ -25,7 +25,7 @@ let packages = [
   nodejs
   ffmpeg
   youtube-dl
-] ++ lib.optionals stdenv.isLinux [ pulseaudio ];
+] ++ lib.optionals stdenv.hostPlatform.isLinux [ pulseaudio ];
 
 in
 python3Packages.buildPythonApplication {
@@ -39,7 +39,7 @@ python3Packages.buildPythonApplication {
     sha256 = "sha256-dxsIcBPrZaXlsfzOEXhYj2qoK5LRducJG2ggMrMMl9Y=";
   };
 
-  buildInputs = lib.optional stdenv.isLinux qtwayland;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux qtwayland;
   propagatedBuildInputs = with python3Packages; ([
     pychromecast
     psutil
@@ -72,7 +72,7 @@ python3Packages.buildPythonApplication {
   postInstall = ''
     substituteInPlace $out/${python3Packages.python.sitePackages}/mkchromecast/video.py \
       --replace '/usr/share/mkchromecast/nodejs/' '${placeholder "out"}/share/mkchromecast/nodejs/'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install -Dm 755 -t $out/bin bin/audiodevice
     substituteInPlace $out/${python3Packages.python.sitePackages}/mkchromecast/audio_devices.py \
       --replace './bin/audiodevice' '${placeholder "out"}/bin/audiodevice'
diff --git a/pkgs/applications/networking/mpop/default.nix b/pkgs/applications/networking/mpop/default.nix
index 7370ddd6e201..5e41ef5d2a91 100644
--- a/pkgs/applications/networking/mpop/default.nix
+++ b/pkgs/applications/networking/mpop/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs =
-    lib.optional stdenv.isDarwin Security
+    lib.optional stdenv.hostPlatform.isDarwin Security
     ++ lib.optional gsaslSupport gsasl
     ++ lib.optional idnSupport libidn
     ++ lib.optional (sslLibrary == "gnutls") gnutls
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     (lib.withFeature idnSupport "idn")
     (lib.withFeature gsaslSupport "gsasl")
     "--with-tls=${sslLibrary}"
-  ] ++ lib.optional stdenv.isDarwin "--with-macosx-keyring";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--with-macosx-keyring";
 
   meta = with lib;{
     description = "POP3 mail retrieval agent";
diff --git a/pkgs/applications/networking/msmtp/default.nix b/pkgs/applications/networking/msmtp/default.nix
index 6bd0f38ba6f4..15cd369ae335 100644
--- a/pkgs/applications/networking/msmtp/default.nix
+++ b/pkgs/applications/networking/msmtp/default.nix
@@ -48,10 +48,10 @@ let
     inherit version src meta;
 
     configureFlags = [ "--sysconfdir=/etc" "--with-libgsasl" ]
-      ++ optionals stdenv.isDarwin [ "--with-macosx-keyring" ];
+      ++ optionals stdenv.hostPlatform.isDarwin [ "--with-macosx-keyring" ];
 
     buildInputs = [ gnutls gsasl libidn2 ]
-      ++ optionals stdenv.isDarwin [ Security ]
+      ++ optionals stdenv.hostPlatform.isDarwin [ Security ]
       ++ optionals withKeyring [ libsecret ];
 
     nativeBuildInputs = [ autoreconfHook pkg-config texinfo ];
diff --git a/pkgs/applications/networking/mujmap/default.nix b/pkgs/applications/networking/mujmap/default.nix
index d89c17355046..8ee04ef19607 100644
--- a/pkgs/applications/networking/mujmap/default.nix
+++ b/pkgs/applications/networking/mujmap/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     notmuch
-  ] ++ lib.optional stdenv.isDarwin Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "JMAP integration for notmuch mail";
diff --git a/pkgs/applications/networking/mullvad/openvpn.nix b/pkgs/applications/networking/mullvad/openvpn.nix
index 0dcfeaabf677..af2a2d2e494e 100644
--- a/pkgs/applications/networking/mullvad/openvpn.nix
+++ b/pkgs/applications/networking/mullvad/openvpn.nix
@@ -31,7 +31,7 @@ openvpn.overrideAttrs (oldAttrs:
     ];
 
     buildInputs = oldAttrs.buildInputs or [ ]
-       ++ optional stdenv.isLinux [ libnl.dev ];
+       ++ optional stdenv.hostPlatform.isLinux [ libnl.dev ];
 
     configureFlags = [
       # Assignement instead of appending to make sure to use exactly the flags required by mullvad
@@ -52,7 +52,7 @@ openvpn.overrideAttrs (oldAttrs:
       "--disable-lz4"
       "--enable-comp-stub"
     ]
-    ++ optional stdenv.isLinux [
+    ++ optional stdenv.hostPlatform.isLinux [
       # Flags are based on https://github.com/mullvad/mullvadvpn-app-binaries/blob/main/Makefile#L35
       "--enable-dco" # requires libnl
       "--disable-iproute2"
diff --git a/pkgs/applications/networking/nload/default.nix b/pkgs/applications/networking/nload/default.nix
index a2b2731b3b03..3f97981528f5 100644
--- a/pkgs/applications/networking/nload/default.nix
+++ b/pkgs/applications/networking/nload/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin autoreconfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin autoreconfHook;
   buildInputs = [ ncurses ];
 
   meta = {
diff --git a/pkgs/applications/networking/nym/default.nix b/pkgs/applications/networking/nym/default.nix
index fc2095caaf21..41fe108b99f2 100644
--- a/pkgs/applications/networking/nym/default.nix
+++ b/pkgs/applications/networking/nym/default.nix
@@ -45,7 +45,7 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security CoreServices ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security CoreServices ];
 
   checkType = "debug";
 
diff --git a/pkgs/applications/networking/offrss/default.nix b/pkgs/applications/networking/offrss/default.nix
index 081f7d96c1aa..89853c8a088d 100644
--- a/pkgs/applications/networking/offrss/default.nix
+++ b/pkgs/applications/networking/offrss/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ curl libmrss ]
     ++ lib.optional (stdenv.hostPlatform == stdenv.buildPlatform) podofo
-    ++ lib.optional (!stdenv.isLinux) libiconv;
+    ++ lib.optional (!stdenv.hostPlatform.isLinux) libiconv;
 
   # Workaround build failure on -fno-common toolchains:
   #   ld: serve_pdf.o:offrss.h:75: multiple definition of `cgi_url_path';
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   configurePhase = ''
     substituteInPlace Makefile \
       --replace '$(CC) $(CFLAGS) $(LDFLAGS)' '$(CXX) $(CFLAGS) $(LDFLAGS)'
-  '' + lib.optionalString (!stdenv.isLinux) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isLinux) ''
     sed 's/#EXTRA/EXTRA/' -i Makefile
   '' + lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
     sed 's/^PDF/#PDF/' -i Makefile
diff --git a/pkgs/applications/networking/omping/default.nix b/pkgs/applications/networking/omping/default.nix
index 808df455a4f2..1efcd98b46f8 100644
--- a/pkgs/applications/networking/omping/default.nix
+++ b/pkgs/applications/networking/omping/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Open Multicast Ping (omping) is a tool for testing IPv4/IPv6 multicast connectivity on a LAN";
     license = licenses.mit;
     platforms = platforms.unix;
diff --git a/pkgs/applications/networking/onionshare/default.nix b/pkgs/applications/networking/onionshare/default.nix
index 18d791f53402..9e7152393a4d 100644
--- a/pkgs/applications/networking/onionshare/default.nix
+++ b/pkgs/applications/networking/onionshare/default.nix
@@ -102,9 +102,9 @@ rec {
       export HOME="$(mktemp -d)"
     '';
 
-    disabledTests = lib.optionals stdenv.isLinux [
+    disabledTests = lib.optionals stdenv.hostPlatform.isLinux [
       "test_get_tor_paths_linux"  # expects /usr instead of /nix/store
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # requires meek-client which is not packaged
       "test_get_tor_paths_darwin"
       # on darwin (and only on darwin) onionshare attempts to discover
diff --git a/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix b/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix
index 67dab32e113f..61501dbeb20e 100644
--- a/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix
+++ b/pkgs/applications/networking/p2p/eiskaltdcpp/default.nix
@@ -26,7 +26,7 @@ mkDerivation rec {
       GetoptLong
       TermShellUI
     ])) ]
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   cmakeFlags = [
     "-DDBUS_NOTIFY=ON"
diff --git a/pkgs/applications/networking/p2p/enhanced-ctorrent/default.nix b/pkgs/applications/networking/p2p/enhanced-ctorrent/default.nix
index e8432b4c5c24..507469022804 100644
--- a/pkgs/applications/networking/p2p/enhanced-ctorrent/default.nix
+++ b/pkgs/applications/networking/p2p/enhanced-ctorrent/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "BitTorrent client written in C++";
     mainProgram = "ctorrent";
     longDescription = ''
diff --git a/pkgs/applications/networking/p2p/mldonkey/default.nix b/pkgs/applications/networking/p2p/mldonkey/default.nix
index 81a625e5210f..d83a33833b0b 100644
--- a/pkgs/applications/networking/p2p/mldonkey/default.nix
+++ b/pkgs/applications/networking/p2p/mldonkey/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   buildInputs = (with ocamlPackages; [ num ]) ++ [ zlib ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Client for many p2p networks, with multiple frontends";
     homepage = "https://github.com/ygrek/mldonkey";
     license = lib.licenses.gpl2Only;
diff --git a/pkgs/applications/networking/p2p/pyrosimple/default.nix b/pkgs/applications/networking/p2p/pyrosimple/default.nix
index 795f6969ff48..240dc4199801 100644
--- a/pkgs/applications/networking/p2p/pyrosimple/default.nix
+++ b/pkgs/applications/networking/p2p/pyrosimple/default.nix
@@ -5,7 +5,7 @@
 , pyrosimple
 , python3
 , testers
-, withInotify ? stdenv.isLinux
+, withInotify ? stdenv.hostPlatform.isLinux
 }:
 
 python3.pkgs.buildPythonApplication rec {
diff --git a/pkgs/applications/networking/p2p/qbittorrent/default.nix b/pkgs/applications/networking/p2p/qbittorrent/default.nix
index 1ec2cbac9ce4..54793401abbe 100644
--- a/pkgs/applications/networking/p2p/qbittorrent/default.nix
+++ b/pkgs/applications/networking/p2p/qbittorrent/default.nix
@@ -52,11 +52,11 @@ stdenv.mkDerivation rec {
     qtbase
     qtsvg
     qttools
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ] ++ lib.optionals guiSupport [
     dbus
-  ] ++ lib.optionals (guiSupport && stdenv.isLinux) [
+  ] ++ lib.optionals (guiSupport && stdenv.hostPlatform.isLinux) [
     qtwayland
   ] ++ lib.optionals trackerSearch [
     python3
@@ -78,7 +78,7 @@ stdenv.mkDerivation rec {
 
   dontWrapGApps = true;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     APP_NAME=qbittorrent${lib.optionalString (!guiSupport) "-nox"}
     mkdir -p $out/{Applications,bin}
     cp -R $APP_NAME.app $out/Applications
diff --git a/pkgs/applications/networking/p2p/synapse-bt/default.nix b/pkgs/applications/networking/p2p/synapse-bt/default.nix
index 9ab60d5a18f4..120afed45de6 100644
--- a/pkgs/applications/networking/p2p/synapse-bt/default.nix
+++ b/pkgs/applications/networking/p2p/synapse-bt/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security ];
 
   cargoBuildFlags = [ "--all" ];
 
diff --git a/pkgs/applications/networking/p2p/transmission/4.nix b/pkgs/applications/networking/p2p/transmission/4.nix
index dd27a22168b4..25296efe6926 100644
--- a/pkgs/applications/networking/p2p/transmission/4.nix
+++ b/pkgs/applications/networking/p2p/transmission/4.nix
@@ -55,7 +55,7 @@ let
     zlib
   ]
   ++ optionals enableSystemd [ systemd ]
-  ++ optionals stdenv.isLinux [ inotify-tools ]);
+  ++ optionals stdenv.hostPlatform.isLinux [ inotify-tools ]);
 
 in
 stdenv.mkDerivation (finalAttrs: {
@@ -93,7 +93,7 @@ stdenv.mkDerivation (finalAttrs: {
     (cmakeBool "ENABLE_MAC" false) # requires xcodebuild
     (cmakeBool "ENABLE_QT" (enableQt5 || enableQt6))
     (cmakeBool "INSTALL_LIB" installLib)
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     # Transmission sets this to 10.13 if not explicitly specified, see https://github.com/transmission/transmission/blob/0be7091eb12f4eb55f6690f313ef70a66795ee72/CMakeLists.txt#L7-L16.
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=${stdenv.hostPlatform.darwinMinVersion}"
   ];
@@ -145,8 +145,8 @@ stdenv.mkDerivation (finalAttrs: {
   ++ optionals enableQt6 (with qt6Packages; [ qttools qtbase qtsvg ])
   ++ optionals enableGTK3 [ gtkmm3 xorg.libpthreadstubs ]
   ++ optionals enableSystemd [ systemd ]
-  ++ optionals stdenv.isLinux [ inotify-tools ]
-  ++ optionals stdenv.isDarwin [ libiconv Foundation ];
+  ++ optionals stdenv.hostPlatform.isLinux [ inotify-tools ]
+  ++ optionals stdenv.hostPlatform.isDarwin [ libiconv Foundation ];
 
   postInstall = ''
     mkdir $apparmor
diff --git a/pkgs/applications/networking/p2p/tremc/default.nix b/pkgs/applications/networking/p2p/tremc/default.nix
index 8f3b2c6e35ef..98ab36dac08a 100644
--- a/pkgs/applications/networking/p2p/tremc/default.nix
+++ b/pkgs/applications/networking/p2p/tremc/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, fetchpatch, python3Packages
-, x11Support ? !stdenv.isDarwin
+, x11Support ? !stdenv.hostPlatform.isDarwin
 , xclip ? null
 , pbcopy ? null
 , useGeoIP ? false # Require /var/lib/geoip-databases/GeoIP.dat
@@ -7,7 +7,7 @@
 let
   wrapperPath = lib.makeBinPath (
     lib.optional x11Support xclip ++
-    lib.optional stdenv.isDarwin pbcopy
+    lib.optional stdenv.hostPlatform.isDarwin pbcopy
   );
 in
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/networking/pjsip/default.nix b/pkgs/applications/networking/pjsip/default.nix
index f27a57012366..3cdfe57c8a5f 100644
--- a/pkgs/applications/networking/pjsip/default.nix
+++ b/pkgs/applications/networking/pjsip/default.nix
@@ -50,8 +50,8 @@ stdenv.mkDerivation (finalAttrs: {
       openssl
       libsamplerate
     ]
-    ++ lib.optional stdenv.isLinux alsa-lib
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       AppKit
       CoreFoundation
       Security
@@ -59,7 +59,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   env =
     lib.optionalAttrs stdenv.cc.isClang { CXXFLAGS = "-std=c++11"; }
-    // lib.optionalAttrs stdenv.isDarwin { NIX_CFLAGS_LINK = "-headerpad_max_install_names"; };
+    // lib.optionalAttrs stdenv.hostPlatform.isDarwin { NIX_CFLAGS_LINK = "-headerpad_max_install_names"; };
 
   preConfigure = ''
     export LD=$CC
@@ -86,7 +86,7 @@ stdenv.mkDerivation (finalAttrs: {
           python -m installer --prefix $py dist/*.whl
       )
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # On MacOS relative paths are used to refer to libraries. All libraries use
       # a relative path like ../lib/*.dylib or ../../lib/*.dylib. We need to
       # rewrite these to use absolute ones.
diff --git a/pkgs/applications/networking/qv2ray/default.nix b/pkgs/applications/networking/qv2ray/default.nix
index 01e471c97de9..1105933a9afa 100644
--- a/pkgs/applications/networking/qv2ray/default.nix
+++ b/pkgs/applications/networking/qv2ray/default.nix
@@ -30,7 +30,7 @@ mkDerivation rec {
     fetchSubmodules = true;
   };
 
-  postPatch = lib.optionals stdenv.isDarwin ''
+  postPatch = lib.optionals stdenv.hostPlatform.isDarwin ''
     substituteInPlace cmake/platforms/macos.cmake \
       --replace \''${QV2RAY_QtX_DIR}/../../../bin/macdeployqt macdeployqt
   '';
@@ -76,7 +76,7 @@ mkDerivation rec {
     maintainers = with maintainers; [ poscat rewine ];
     platforms = platforms.all;
     # never built on aarch64-darwin, x86_64-darwin since update to unstable-2022-09-25
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "qv2ray";
   };
 }
diff --git a/pkgs/applications/networking/remote/citrix-workspace/generic.nix b/pkgs/applications/networking/remote/citrix-workspace/generic.nix
index 18c3da84c3bf..b59a82f720dc 100644
--- a/pkgs/applications/networking/remote/citrix-workspace/generic.nix
+++ b/pkgs/applications/networking/remote/citrix-workspace/generic.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
 
     message = ''
       In order to use Citrix Workspace, you need to comply with the Citrix EULA and download
-      the ${if stdenv.is64bit then "64-bit" else "32-bit"} binaries, .tar.gz from:
+      the ${if stdenv.hostPlatform.is64bit then "64-bit" else "32-bit"} binaries, .tar.gz from:
 
       ${homepage}
 
diff --git a/pkgs/applications/networking/remote/citrix-workspace/sources.nix b/pkgs/applications/networking/remote/citrix-workspace/sources.nix
index 1b0826c4d2bd..2b5d0e9d7b14 100644
--- a/pkgs/applications/networking/remote/citrix-workspace/sources.nix
+++ b/pkgs/applications/networking/remote/citrix-workspace/sources.nix
@@ -3,9 +3,9 @@
 let
   mkVersionInfo = _: { major, minor, patch, x64hash, x86hash, x64suffix, x86suffix, homepage }:
     { inherit homepage;
-      version = "${major}.${minor}.${patch}.${if stdenv.is64bit then x64suffix else x86suffix}";
-      prefix = "linuxx${if stdenv.is64bit then "64" else "86"}";
-      hash = if stdenv.is64bit then x64hash else x86hash;
+      version = "${major}.${minor}.${patch}.${if stdenv.hostPlatform.is64bit then x64suffix else x86suffix}";
+      prefix = "linuxx${if stdenv.hostPlatform.is64bit then "64" else "86"}";
+      hash = if stdenv.hostPlatform.is64bit then x64hash else x86hash;
     };
 
   # Attribute-set with all actively supported versions of the Citrix workspace app
diff --git a/pkgs/applications/networking/remote/freerdp/3.nix b/pkgs/applications/networking/remote/freerdp/3.nix
index 31d5b2beee44..49b412bf7663 100644
--- a/pkgs/applications/networking/remote/freerdp/3.nix
+++ b/pkgs/applications/networking/remote/freerdp/3.nix
@@ -152,13 +152,13 @@ stdenv.mkDerivation (finalAttrs: {
     SDL2_image
     uriparser
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     fuse3
     systemd
     wayland
     wayland-scanner
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AudioToolbox
     AVFoundation
     Carbon
@@ -179,7 +179,7 @@ stdenv.mkDerivation (finalAttrs: {
     WITH_CUPS = cups != null;
     WITH_FAAC = withUnfree && faac != null;
     WITH_FAAD2 = faad2 != null;
-    WITH_FUSE = stdenv.isLinux && fuse3 != null;
+    WITH_FUSE = stdenv.hostPlatform.isLinux && fuse3 != null;
     WITH_JPEG = libjpeg_turbo != null;
     WITH_KRB5 = libkrb5 != null;
     WITH_OPENH264 = openh264 != null;
@@ -194,7 +194,7 @@ stdenv.mkDerivation (finalAttrs: {
     WITH_X11 = true;
   };
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-DTARGET_OS_IPHONE=0"
     "-DTARGET_OS_WATCH=0"
     "-include AudioToolbox/AudioToolbox.h"
@@ -202,7 +202,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Wno-error=incompatible-function-pointer-types"
   ]);
 
-  env.NIX_LDFLAGS = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_LDFLAGS = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-framework AudioToolbox"
   ]);
 
diff --git a/pkgs/applications/networking/remote/freerdp/default.nix b/pkgs/applications/networking/remote/freerdp/default.nix
index 988986812e30..7490066c7327 100644
--- a/pkgs/applications/networking/remote/freerdp/default.nix
+++ b/pkgs/applications/networking/remote/freerdp/default.nix
@@ -64,7 +64,7 @@ let
       dir = "libfreerdp/crypto/test";
       file = "Test_x509_cert_info.c";
     }
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     {
       dir = "winpr/libwinpr/sysinfo/test";
       file = "TestGetComputerName.c";
@@ -140,11 +140,11 @@ stdenv.mkDerivation rec {
     pcre2
     pcsclite
     zlib
-  ] ++ optionals stdenv.isLinux [
+  ] ++ optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     systemd
     wayland
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     AudioToolbox
     AVFoundation
     Carbon
@@ -185,7 +185,7 @@ stdenv.mkDerivation rec {
     WITH_X11 = true;
   };
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-DTARGET_OS_IPHONE=0"
     "-DTARGET_OS_WATCH=0"
     "-include AudioToolbox/AudioToolbox.h"
@@ -193,7 +193,7 @@ stdenv.mkDerivation rec {
     "-Wno-error=incompatible-function-pointer-types"
   ]);
 
-  NIX_LDFLAGS = lib.optionals stdenv.isDarwin [
+  NIX_LDFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [
     "-framework AudioToolbox"
   ];
 
diff --git a/pkgs/applications/networking/remote/putty/default.nix b/pkgs/applications/networking/remote/putty/default.nix
index 82f096699b20..585f48d3a5f8 100644
--- a/pkgs/applications/networking/remote/putty/default.nix
+++ b/pkgs/applications/networking/remote/putty/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake perl pkg-config copyDesktopItems ];
   buildInputs = lib.optionals stdenv.hostPlatform.isUnix [
     gtk3 ncurses
-  ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.libs.utmp;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.libs.utmp;
   enableParallelBuilding = true;
 
   desktopItems = [
diff --git a/pkgs/applications/networking/remote/rdesktop/default.nix b/pkgs/applications/networking/remote/rdesktop/default.nix
index a544984ee76b..b92822b17d3f 100644
--- a/pkgs/applications/networking/remote/rdesktop/default.nix
+++ b/pkgs/applications/networking/remote/rdesktop/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, openssl, libX11, krb5, libXcursor, libtasn1
 , nettle, gnutls, pkg-config, autoreconfHook, libiconv
-, enableCredssp ? (!stdenv.isDarwin)
+, enableCredssp ? (!stdenv.hostPlatform.isDarwin)
 } :
 
 stdenv.mkDerivation (rec {
@@ -17,7 +17,7 @@ stdenv.mkDerivation (rec {
   nativeBuildInputs = [pkg-config autoreconfHook];
   buildInputs = [openssl libX11 libXcursor libtasn1 nettle gnutls]
     ++ lib.optional enableCredssp krb5
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   configureFlags = [
     "--with-ipv6"
diff --git a/pkgs/applications/networking/remote/remmina/default.nix b/pkgs/applications/networking/remote/remmina/default.nix
index c960d0b473b2..eb926ff1c066 100644
--- a/pkgs/applications/networking/remote/remmina/default.nix
+++ b/pkgs/applications/networking/remote/remmina/default.nix
@@ -10,8 +10,8 @@
 , wayland
 # The themes here are soft dependencies; only icons are missing without them.
 , adwaita-icon-theme
-, withKf5Wallet ? stdenv.isLinux, libsForQt5
-, withLibsecret ? stdenv.isLinux
+, withKf5Wallet ? stdenv.hostPlatform.isLinux, libsForQt5
+, withLibsecret ? stdenv.hostPlatform.isLinux
 , withWebkitGtk ? false, webkitgtk_4_1
 , withVte ? true, vte
 }:
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   nativeBuildInputs = [ cmake ninja pkg-config wrapGAppsHook3 ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   buildInputs = [
     curl
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
     openssl adwaita-icon-theme json-glib libsodium
     harfbuzz python3
     wayland
-  ] ++ lib.optionals stdenv.isLinux [ fuse3 libappindicator-gtk3 libdbusmenu-gtk3 ]
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ fuse3 libappindicator-gtk3 libdbusmenu-gtk3 ]
     ++ lib.optionals withLibsecret [ libsecret ]
     ++ lib.optionals withKf5Wallet [ libsForQt5.kwallet ]
     ++ lib.optionals withWebkitGtk [ webkitgtk_4_1 ]
@@ -65,13 +65,13 @@ stdenv.mkDerivation (finalAttrs: {
     "-DWITH_KF5WALLET=${if withKf5Wallet then "ON" else "OFF"}"
     "-DWITH_LIBSECRET=${if withLibsecret then "ON" else "OFF"}"
     "-DWITH_WEBKIT2GTK=${if withWebkitGtk then "ON" else "OFF"}"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DHAVE_LIBAPPINDICATOR=OFF"
     "-DWITH_CUPS=OFF"
     "-DWITH_ICON_CACHE=OFF"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     "-DTARGET_OS_IPHONE=0"
     "-DTARGET_OS_WATCH=0"
   ]);
@@ -82,7 +82,7 @@ stdenv.mkDerivation (finalAttrs: {
     gappsWrapperArgs+=(
       --set-default SSL_CERT_DIR "/etc/ssl/certs/"
       --prefix LD_LIBRARY_PATH : "${libX11.out}/lib"
-      ${lib.optionalString stdenv.isDarwin ''
+      ${lib.optionalString stdenv.hostPlatform.isDarwin ''
         --prefix XDG_DATA_DIRS : "$XDG_ICON_DIRS"
       ''}
     )
diff --git a/pkgs/applications/networking/rymdport/default.nix b/pkgs/applications/networking/rymdport/default.nix
index 08c5243414da..70b446db8a5a 100644
--- a/pkgs/applications/networking/rymdport/default.nix
+++ b/pkgs/applications/networking/rymdport/default.nix
@@ -35,7 +35,7 @@ buildGoModule rec {
     libXinerama
     libXrandr
     libXxf86vm
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
     Cocoa
     IOKit
diff --git a/pkgs/applications/networking/sniffers/qtwirediff/default.nix b/pkgs/applications/networking/sniffers/qtwirediff/default.nix
index 7cadaee0e203..ad71c217dbb9 100644
--- a/pkgs/applications/networking/sniffers/qtwirediff/default.nix
+++ b/pkgs/applications/networking/sniffers/qtwirediff/default.nix
@@ -27,17 +27,17 @@ stdenv.mkDerivation {
 
   buildInputs = [
     qtbase
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
   installPhase = ''
     runHook preInstall
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -r qtwirediff.app $out/Applications
     makeWrapper $out/{Applications/qtwirediff.app/Contents/MacOS,bin}/qtwirediff
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     install -Dm755 -T qtwirediff $out/bin/qtwirediff
     wrapProgram $out/bin/qtwirediff \
       --prefix PATH : "${lib.makeBinPath [ wireshark-cli ]}"
diff --git a/pkgs/applications/networking/sniffers/wireshark/default.nix b/pkgs/applications/networking/sniffers/wireshark/default.nix
index 191924ac7002..04f62befcc9b 100644
--- a/pkgs/applications/networking/sniffers/wireshark/default.nix
+++ b/pkgs/applications/networking/sniffers/wireshark/default.nix
@@ -51,7 +51,7 @@
 , qt6 ? null
 }:
 let
-  isAppBundle = withQt && stdenv.isDarwin;
+  isAppBundle = withQt && stdenv.hostPlatform.isDarwin;
 in
 assert withQt -> qt6 != null;
 
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals withQt [
     qt6.wrapQtAppsHook
     wrapGAppsHook3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
@@ -126,13 +126,13 @@ stdenv.mkDerivation rec {
     qtmultimedia
     qtsvg
     qttools
-  ]) ++ lib.optionals (withQt && stdenv.isLinux) [
+  ]) ++ lib.optionals (withQt && stdenv.hostPlatform.isLinux) [
     qt6.qtwayland
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap
     libnl
     sbc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     gmp
     SystemConfiguration
@@ -171,7 +171,7 @@ stdenv.mkDerivation rec {
   '' + lib.optionalString isAppBundle ''
     mkdir -p $out/Applications
     mv $out/bin/Wireshark.app $out/Applications/Wireshark.app
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     local flags=()
     for file in $out/lib/*.dylib; do
       flags+=(-change @rpath/"$(basename "$file")" "$file")
diff --git a/pkgs/applications/networking/sniffnet/default.nix b/pkgs/applications/networking/sniffnet/default.nix
index 79df10e20751..146c0941e850 100644
--- a/pkgs/applications/networking/sniffnet/default.nix
+++ b/pkgs/applications/networking/sniffnet/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libpcap
     openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     expat
     fontconfig
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
     xorg.libXcursor
     xorg.libXi
     xorg.libXrandr
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     rustPlatform.bindgenHook
   ];
@@ -62,7 +62,7 @@ rustPlatform.buildRustPackage rec {
       --replace 'Exec=/usr/bin/sniffnet' 'Exec=sniffnet'
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/sniffnet \
       --add-rpath ${lib.makeLibraryPath [ vulkan-loader xorg.libX11 libxkbcommon wayland ]}
   '';
diff --git a/pkgs/applications/networking/sync/celeste/default.nix b/pkgs/applications/networking/sync/celeste/default.nix
index fe2d7b07acc8..b1a946f244f9 100644
--- a/pkgs/applications/networking/sync/celeste/default.nix
+++ b/pkgs/applications/networking/sync/celeste/default.nix
@@ -66,12 +66,12 @@ rustPlatform.buildRustPackage rec {
     libadwaita
     librclone
     pango
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
     darwin.apple_sdk.frameworks.Security
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=incompatible-function-pointer-types"
   ]);
 
diff --git a/pkgs/applications/networking/sync/lsyncd/default.nix b/pkgs/applications/networking/sync/lsyncd/default.nix
index bdb1b69289fe..66fa5665ccaf 100644
--- a/pkgs/applications/networking/sync/lsyncd/default.nix
+++ b/pkgs/applications/networking/sync/lsyncd/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   # Special flags needed on Darwin:
   # https://github.com/axkibe/lsyncd/blob/42413cabbedca429d55a5378f6e830f191f3cc86/INSTALL#L51
-  cmakeFlags = lib.optionals stdenv.isDarwin [ "-DWITH_INOTIFY=OFF" "-DWITH_FSEVENTS=ON" "-DXNU_DIR=${xnu}/include" ];
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "-DWITH_INOTIFY=OFF" "-DWITH_FSEVENTS=ON" "-DXNU_DIR=${xnu}/include" ];
 
   dontUseCmakeBuildDir = true;
 
diff --git a/pkgs/applications/networking/sync/rclone/default.nix b/pkgs/applications/networking/sync/rclone/default.nix
index df4001e1d0b7..a76ad3ab4421 100644
--- a/pkgs/applications/networking/sync/rclone/default.nix
+++ b/pkgs/applications/networking/sync/rclone/default.nix
@@ -23,13 +23,13 @@ buildGoModule rec {
 
   nativeBuildInputs = [ installShellFiles makeWrapper ];
 
-  buildInputs = lib.optional enableCmount (if stdenv.isDarwin then macfuse-stubs else fuse);
+  buildInputs = lib.optional enableCmount (if stdenv.hostPlatform.isDarwin then macfuse-stubs else fuse);
 
   tags = lib.optionals enableCmount [ "cmount" ];
 
   ldflags = [ "-s" "-w" "-X github.com/rclone/rclone/fs.Version=${version}" ];
 
-  postConfigure = lib.optionalString (!stdenv.isDarwin) ''
+  postConfigure = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace vendor/github.com/winfsp/cgofuse/fuse/host_cgo.go \
         --replace-fail '"libfuse.so.2"' '"${lib.getLib fuse}/lib/libfuse.so.2"'
   '';
@@ -51,7 +51,7 @@ buildGoModule rec {
       # filesystem helpers
       ln -s $out/bin/rclone $out/bin/rclonefs
       ln -s $out/bin/rclone $out/bin/mount.rclone
-    '' + lib.optionalString (enableCmount && !stdenv.isDarwin)
+    '' + lib.optionalString (enableCmount && !stdenv.hostPlatform.isDarwin)
       # use --suffix here to ensure we don't shadow /run/wrappers/bin/fusermount3,
       # as the setuid wrapper is required as non-root on NixOS.
       ''
diff --git a/pkgs/applications/networking/syncplay/default.nix b/pkgs/applications/networking/syncplay/default.nix
index 956dd598d4c3..f7d0fdeb5c36 100644
--- a/pkgs/applications/networking/syncplay/default.nix
+++ b/pkgs/applications/networking/syncplay/default.nix
@@ -28,11 +28,11 @@ buildPythonApplication rec {
     ./trusted_certificates.patch
   ];
 
-  buildInputs = lib.optionals enableGUI [ (if stdenv.isLinux then qt6.qtwayland else qt6.qtbase) ];
+  buildInputs = lib.optionals enableGUI [ (if stdenv.hostPlatform.isLinux then qt6.qtwayland else qt6.qtbase) ];
   propagatedBuildInputs = [ certifi pem twisted ]
     ++ twisted.optional-dependencies.tls
     ++ lib.optional enableGUI pyside6
-    ++ lib.optional (stdenv.isDarwin && enableGUI) appnope;
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && enableGUI) appnope;
   nativeBuildInputs = lib.optionals enableGUI [ qt6.wrapQtAppsHook ];
 
   makeFlags = [ "DESTDIR=" "PREFIX=$(out)" ];
diff --git a/pkgs/applications/networking/syncthing/default.nix b/pkgs/applications/networking/syncthing/default.nix
index 99934a964638..b87752f0412b 100644
--- a/pkgs/applications/networking/syncthing/default.nix
+++ b/pkgs/applications/networking/syncthing/default.nix
@@ -24,7 +24,7 @@ let
 
       vendorHash = "sha256-R5GlsCkfoMc5km+NaV+TNUlM3Ot1ARcXfEFimcZOLI4=";
 
-      nativeBuildInputs = lib.optionals stdenv.isDarwin [
+      nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
         # Recent versions of macOS seem to require binaries to be signed when
         # run from Launch Agents/Daemons, even on x86 devices where it has a
         # more lax code signing policy compared to Apple Silicon. So just sign
@@ -87,7 +87,7 @@ in
         install -Dm644 "$mf" "$mandir/$(basename "$mf")"
       done
 
-    '' + lib.optionalString (stdenv.isLinux) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isLinux) ''
       mkdir -p $out/lib/systemd/{system,user}
 
       substitute etc/linux-systemd/system/syncthing@.service \
@@ -109,7 +109,7 @@ in
     stname = "syncthing-relay";
     target = "strelaysrv";
 
-    postInstall = lib.optionalString (stdenv.isLinux) ''
+    postInstall = lib.optionalString (stdenv.hostPlatform.isLinux) ''
       mkdir -p $out/lib/systemd/system
 
       substitute cmd/strelaysrv/etc/linux-systemd/strelaysrv.service \
diff --git a/pkgs/applications/networking/synology-drive-client/default.nix b/pkgs/applications/networking/synology-drive-client/default.nix
index 0c2f6c1d5ae7..fb930edd1447 100644
--- a/pkgs/applications/networking/synology-drive-client/default.nix
+++ b/pkgs/applications/networking/synology-drive-client/default.nix
@@ -78,4 +78,4 @@ let
       cp -R 'Synology Drive Client.app' $out/Applications/
     '';
   };
-in if stdenv.isDarwin then darwin else linux
+in if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/applications/networking/umurmur/default.nix b/pkgs/applications/networking/umurmur/default.nix
index 5af5c568e463..5f87a7395462 100644
--- a/pkgs/applications/networking/umurmur/default.nix
+++ b/pkgs/applications/networking/umurmur/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/umurmur/umurmur";
     platforms = platforms.all;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     mainProgram = "umurmurd";
   };
 }
diff --git a/pkgs/applications/networking/warp/default.nix b/pkgs/applications/networking/warp/default.nix
index d7f64031c969..c41cc99df4b4 100644
--- a/pkgs/applications/networking/warp/default.nix
+++ b/pkgs/applications/networking/warp/default.nix
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
     gstreamer
     gst-plugins-base
     gst-plugins-bad
-  ]) ++ lib.optionals stdenv.isDarwin [
+  ]) ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     Foundation
   ];
@@ -88,6 +88,6 @@ stdenv.mkDerivation rec {
     maintainers = with lib.maintainers; [ dotlambda foo-dogsquared ];
     platforms = lib.platforms.all;
     mainProgram = "warp";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/networking/yaup/default.nix b/pkgs/applications/networking/yaup/default.nix
index 238bedd52be0..d2fa2778fc87 100644
--- a/pkgs/applications/networking/yaup/default.nix
+++ b/pkgs/applications/networking/yaup/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
     # ld: unknown option: --export-dynamic
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "yaup";
   };
 }
diff --git a/pkgs/applications/office/PageEdit/default.nix b/pkgs/applications/office/PageEdit/default.nix
index 5f47ca9bbe68..fa7acd9310ba 100644
--- a/pkgs/applications/office/PageEdit/default.nix
+++ b/pkgs/applications/office/PageEdit/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [ "-DINSTALL_BUNDLED_DICTS=0" ];
 
   installPhase =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       runHook preInstall
 
       mkdir -p $out/Applications
diff --git a/pkgs/applications/office/appflowy/default.nix b/pkgs/applications/office/appflowy/default.nix
index a7a979ed82d3..f3a7ea76c533 100644
--- a/pkgs/applications/office/appflowy/default.nix
+++ b/pkgs/applications/office/appflowy/default.nix
@@ -40,7 +40,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     makeWrapper
     copyDesktopItems
-  ] ++ lib.optionals stdenvNoCC.isLinux [ autoPatchelfHook ];
+  ] ++ lib.optionals stdenvNoCC.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [
     gtk3
@@ -52,7 +52,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   dontConfigure = true;
 
   installPhase =
-    lib.optionalString stdenvNoCC.isLinux ''
+    lib.optionalString stdenvNoCC.hostPlatform.isLinux ''
       runHook preInstall
 
       cd AppFlowy/
@@ -67,7 +67,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
 
       runHook postInstall
     ''
-    + lib.optionalString stdenvNoCC.isDarwin ''
+    + lib.optionalString stdenvNoCC.hostPlatform.isDarwin ''
       runHook preInstall
 
       mkdir -p $out/{Applications,bin}
@@ -77,17 +77,17 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     '';
 
   preFixup =
-    lib.optionalString stdenvNoCC.isLinux ''
+    lib.optionalString stdenvNoCC.hostPlatform.isLinux ''
       # Add missing libraries to appflowy using the ones it comes with
       makeWrapper $out/opt/AppFlowy $out/bin/appflowy \
         --set LD_LIBRARY_PATH "$out/opt/lib/" \
         --prefix PATH : "${lib.makeBinPath [ xdg-user-dirs ]}"
     ''
-    + lib.optionalString stdenvNoCC.isDarwin ''
+    + lib.optionalString stdenvNoCC.hostPlatform.isDarwin ''
       makeWrapper $out/Applications/AppFlowy.app/Contents/MacOS/AppFlowy $out/bin/appflowy
     '';
 
-  desktopItems = lib.optionals stdenvNoCC.isLinux [
+  desktopItems = lib.optionals stdenvNoCC.hostPlatform.isLinux [
     (makeDesktopItem {
       name = "appflowy";
       desktopName = "AppFlowy";
diff --git a/pkgs/applications/office/beamerpresenter/default.nix b/pkgs/applications/office/beamerpresenter/default.nix
index 2749f3577c98..0d122cfbf3cd 100644
--- a/pkgs/applications/office/beamerpresenter/default.nix
+++ b/pkgs/applications/office/beamerpresenter/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     qtsvg
     qtmultimedia
     qttools
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ] ++ lib.optionals useMupdf [
     freetype
diff --git a/pkgs/applications/office/espanso/default.nix b/pkgs/applications/office/espanso/default.nix
index c8883f36339e..5679c44ca2dc 100644
--- a/pkgs/applications/office/espanso/default.nix
+++ b/pkgs/applications/office/espanso/default.nix
@@ -30,14 +30,14 @@
 , WebKit
 , System
 , waylandSupport ? false
-, x11Support ? stdenv.isLinux
+, x11Support ? stdenv.hostPlatform.isLinux
 , testers
 , espanso
 }:
 # espanso does not support building with both X11 and Wayland support at the same time
-assert stdenv.isLinux -> x11Support != waylandSupport;
-assert stdenv.isDarwin -> !x11Support;
-assert stdenv.isDarwin -> !waylandSupport;
+assert stdenv.hostPlatform.isLinux -> x11Support != waylandSupport;
+assert stdenv.hostPlatform.isDarwin -> !x11Support;
+assert stdenv.hostPlatform.isDarwin -> !waylandSupport;
 rustPlatform.buildRustPackage rec {
   pname = "espanso";
   version = "2.2-unstable-2024-05-14";
@@ -69,20 +69,20 @@ rustPlatform.buildRustPackage rec {
     "modulo"
   ] ++ lib.optionals waylandSupport [
     "wayland"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "vendored-tls"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "native-tls"
   ];
 
   buildInputs = [
     wxGTK32
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     openssl
     dbus
     libnotify
     libxkbcommon
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
@@ -104,7 +104,7 @@ rustPlatform.buildRustPackage rec {
     xdotool
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace scripts/create_bundle.sh \
       --replace-fail target/mac/ $out/Applications/ \
       --replace-fail /bin/echo ${coreutils}/bin/echo
@@ -119,12 +119,12 @@ rustPlatform.buildRustPackage rec {
   doCheck = false;
 
   postInstall =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       EXEC_PATH=$out/bin/espanso BUILD_ARCH=current ${stdenv.shell} ./scripts/create_bundle.sh
     '' else ''
       wrapProgram $out/bin/espanso \
         --prefix PATH : ${lib.makeBinPath (
-          lib.optionals stdenv.isLinux [
+          lib.optionals stdenv.hostPlatform.isLinux [
             libnotify
             setxkbmap
           ] ++ lib.optionals waylandSupport [
diff --git a/pkgs/applications/office/jameica/default.nix b/pkgs/applications/office/jameica/default.nix
index f87eaf6d9e4d..32cbcf088c51 100644
--- a/pkgs/applications/office/jameica/default.nix
+++ b/pkgs/applications/office/jameica/default.nix
@@ -48,8 +48,8 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ ant jdk wrapGAppsHook3 makeWrapper stripJavaArchivesHook ];
-  buildInputs = lib.optionals stdenv.isLinux [ gtk2 glib libXtst ]
-    ++ lib.optional stdenv.isDarwin Cocoa;
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ gtk2 glib libXtst ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   dontWrapGApps = true;
 
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
   postFixup = ''
     makeWrapper ${jre}/bin/java $out/bin/jameica \
       --add-flags "-cp $out/share/java/jameica.jar:$out/share/jameica-${version}/* ${
-        lib.optionalString stdenv.isDarwin ''-Xdock:name="Jameica" -XstartOnFirstThread''
+        lib.optionalString stdenv.hostPlatform.isDarwin ''-Xdock:name="Jameica" -XstartOnFirstThread''
       } de.willuhn.jameica.Main" \
       --prefix LD_LIBRARY_PATH : ${lib.escapeShellArg (lib.makeLibraryPath buildInputs)} \
       --chdir "$out/share/java/" \
diff --git a/pkgs/applications/office/kitsas/default.nix b/pkgs/applications/office/kitsas/default.nix
index f8f32ecec6ed..9821cdd2f2f8 100644
--- a/pkgs/applications/office/kitsas/default.nix
+++ b/pkgs/applications/office/kitsas/default.nix
@@ -28,10 +28,10 @@ stdenv.mkDerivation rec {
 
   qmakeFlags = [ "../kitsas/kitsas.pro" ];
 
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv kitsas.app $out/Applications
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     install -Dm755 kitsas -t $out/bin
     install -Dm644 ../kitsas.svg -t $out/share/icons/hicolor/scalable/apps
     install -Dm644 ../kitsas.png -t $out/share/icons/hicolor/256x256/apps
diff --git a/pkgs/applications/office/libreoffice/wrapper.nix b/pkgs/applications/office/libreoffice/wrapper.nix
index d2e62f8e5c74..aeab3da08dd7 100644
--- a/pkgs/applications/office/libreoffice/wrapper.nix
+++ b/pkgs/applications/office/libreoffice/wrapper.nix
@@ -16,7 +16,7 @@
 , gnugrep
 # Configuration options for the wrapper
 , extraMakeWrapperArgs ? []
-, dbusVerify ? stdenv.isLinux
+, dbusVerify ? stdenv.hostPlatform.isLinux
 , dbus
 }:
 
diff --git a/pkgs/applications/office/micropad/default.nix b/pkgs/applications/office/micropad/default.nix
index 46c318ffbd11..8fd6b2dd5228 100644
--- a/pkgs/applications/office/micropad/default.nix
+++ b/pkgs/applications/office/micropad/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ yarnBuildHook copyDesktopItems makeWrapper ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/applications/office/mmex/default.nix b/pkgs/applications/office/mmex/default.nix
index 14f3c4098102..b88f70225873 100644
--- a/pkgs/applications/office/mmex/default.nix
+++ b/pkgs/applications/office/mmex/default.nix
@@ -27,10 +27,10 @@ stdenv.mkDerivation rec {
     hash = "sha256-TQgJ2Q4Z7+OtwuwkfPBgm2BmMKML9nmyFLSkmKJ1RE4=";
   };
 
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     substituteInPlace src/platfdep_mac.mm \
       --replace "appearance.name == NSAppearanceNameDarkAqua" "NO"
-  '' + lib.optionalString (stdenv.isLinux && !stdenv.isx86_64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isx86_64) ''
     substituteInPlace 3rd/CMakeLists.txt \
       --replace "-msse4.2 -maes" ""
   '';
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     makeWrapper
     pkg-config
     wrapGAppsHook3
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     lsb-release
   ];
 
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     sqlite
     wxGTK32
     gtk3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
     "-Wno-unused-parameter"
   ]);
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv $out/mmex.app $out/Applications
     makeWrapper $out/{Applications/mmex.app/Contents/MacOS,bin}/mmex
diff --git a/pkgs/applications/office/paperless-ngx/default.nix b/pkgs/applications/office/paperless-ngx/default.nix
index 9e8f2e6f6a34..3dc090921941 100644
--- a/pkgs/applications/office/paperless-ngx/default.nix
+++ b/pkgs/applications/office/paperless-ngx/default.nix
@@ -81,13 +81,13 @@ let
     nativeBuildInputs = [
       pkg-config
       python3
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       xcbuild
     ];
 
     buildInputs = [
       pango
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       giflib
       darwin.apple_sdk.frameworks.CoreText
     ];
@@ -254,7 +254,7 @@ python.pkgs.buildPythonApplication rec {
     "test_rtl_language_detection"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru = {
     inherit python path frontend tesseract5;
diff --git a/pkgs/applications/office/pympress/default.nix b/pkgs/applications/office/pympress/default.nix
index 8ada870912eb..f370ecec9ddf 100644
--- a/pkgs/applications/office/pympress/default.nix
+++ b/pkgs/applications/office/pympress/default.nix
@@ -7,9 +7,9 @@
 , gobject-introspection
 , libcanberra-gtk3
 , poppler_gi
-, withGstreamer ? stdenv.isLinux
+, withGstreamer ? stdenv.hostPlatform.isLinux
 , gst_all_1
-, withVLC ? stdenv.isLinux
+, withVLC ? stdenv.hostPlatform.isLinux
 }:
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/applications/office/qnotero/default.nix b/pkgs/applications/office/qnotero/default.nix
index c091f61dffc6..4fd2e741adb0 100644
--- a/pkgs/applications/office/qnotero/default.nix
+++ b/pkgs/applications/office/qnotero/default.nix
@@ -47,7 +47,7 @@ python3Packages.buildPythonPackage rec {
     homepage = "https://www.cogsci.nl/software/qnotero";
     license = lib.licenses.gpl2;
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin; # Build fails even after adding cx-freeze to `buildInputs`
+    broken = stdenv.hostPlatform.isDarwin; # Build fails even after adding cx-freeze to `buildInputs`
     maintainers = [ lib.maintainers.nico202 ];
   };
 }
diff --git a/pkgs/applications/office/qownnotes/default.nix b/pkgs/applications/office/qownnotes/default.nix
index 2b8d0d089269..71b574ee38e5 100644
--- a/pkgs/applications/office/qownnotes/default.nix
+++ b/pkgs/applications/office/qownnotes/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation {
     pkg-config
     installShellFiles
     xvfb-run
-  ] ++ lib.optionals stdenv.isDarwin [ makeWrapper ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ makeWrapper ];
 
   buildInputs = [
     qtbase
@@ -45,7 +45,7 @@ stdenv.mkDerivation {
     qtsvg
     qtwebsockets
     botan2
-  ] ++ lib.optionals stdenv.isLinux [ qtwayland ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ qtwayland ];
 
   cmakeFlags = [
     "-DQON_QT6_BUILD=ON"
@@ -61,11 +61,11 @@ stdenv.mkDerivation {
       --fish <(xvfb-run $out/bin/${appname} --completion fish)
   ''
   # Create a lowercase symlink for Linux
-  + lib.optionalString stdenv.isLinux ''
+  + lib.optionalString stdenv.hostPlatform.isLinux ''
     ln -s $out/bin/${appname} $out/bin/${pname}
   ''
   # Wrap application for macOS as lowercase binary
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/${appname}.app $out/Applications
     makeWrapper $out/Applications/${appname}.app/Contents/MacOS/${appname} $out/bin/${pname}
diff --git a/pkgs/applications/office/roam-research/default.nix b/pkgs/applications/office/roam-research/default.nix
index 408f026bc57a..3edbbe1a5081 100644
--- a/pkgs/applications/office/roam-research/default.nix
+++ b/pkgs/applications/office/roam-research/default.nix
@@ -2,7 +2,7 @@
 let
   extraArgs = removeAttrs args [ "callPackage" ];
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   callPackage ./darwin.nix (extraArgs // { })
 else
   callPackage ./linux.nix (extraArgs // { })
diff --git a/pkgs/applications/office/scribus/default.nix b/pkgs/applications/office/scribus/default.nix
index 85c0afe9db66..f95ac14c67ab 100644
--- a/pkgs/applications/office/scribus/default.nix
+++ b/pkgs/applications/office/scribus/default.nix
@@ -83,6 +83,6 @@ stdenv.mkDerivation (finalAttrs: {
       mit
       publicDomain
     ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/office/treesheets/default.nix b/pkgs/applications/office/treesheets/default.nix
index b52dc1dc835f..a696ab541280 100644
--- a/pkgs/applications/office/treesheets/default.nix
+++ b/pkgs/applications/office/treesheets/default.nix
@@ -30,13 +30,13 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     wxGTK
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
   env.NIX_CFLAGS_COMPILE = "-DPACKAGE_VERSION=\"${builtins.replaceStrings [ "unstable-" ] [ "" ] version}\"";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shopt -s extglob
     mkdir -p $out/{share/treesheets,bin}
     mv $out/!(share) $out/share/treesheets
diff --git a/pkgs/applications/office/trilium/desktop.nix b/pkgs/applications/office/trilium/desktop.nix
index 9681c5fc9b8a..13a291f45804 100644
--- a/pkgs/applications/office/trilium/desktop.nix
+++ b/pkgs/applications/office/trilium/desktop.nix
@@ -96,4 +96,4 @@ let
   };
 
 in
-  if stdenv.isDarwin then darwin else linux
+  if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/applications/office/wordgrinder/default.nix b/pkgs/applications/office/wordgrinder/default.nix
index 3647d8ea8e22..c3b2aaf42a07 100644
--- a/pkgs/applications/office/wordgrinder/default.nix
+++ b/pkgs/applications/office/wordgrinder/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     "OBJDIR=$TMP/wg-build"
   ];
 
-  preBuild = lib.optionalString stdenv.isLinux ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isLinux ''
     makeFlagsArray+=('XFT_PACKAGE=--cflags={} --libs={-lX11 -lXft}')
   '';
 
@@ -38,17 +38,17 @@ stdenv.mkDerivation rec {
     ncurses
     readline
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libXft
   ];
 
   # To be able to find <Xft.h>
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isLinux "-I${libXft.dev}/include/X11";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isLinux "-I${libXft.dev}/include/X11";
 
   # Binaries look for LuaFileSystem library (lfs.so) at runtime
   postInstall = ''
     wrapProgram $out/bin/wordgrinder --set LUA_CPATH "${lua52Packages.luafilesystem}/lib/lua/5.2/lfs.so";
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/xwordgrinder --set LUA_CPATH "${lua52Packages.luafilesystem}/lib/lua/5.2/lfs.so";
   '';
 
diff --git a/pkgs/applications/office/zim/default.nix b/pkgs/applications/office/zim/default.nix
index 0f4017dbbc07..77eaaa16b992 100644
--- a/pkgs/applications/office/zim/default.nix
+++ b/pkgs/applications/office/zim/default.nix
@@ -55,6 +55,6 @@ python3Packages.buildPythonApplication rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ pSub ];
     mainProgram = "zim";
-    broken = stdenv.isDarwin; # https://github.com/NixOS/nixpkgs/pull/52658#issuecomment-449565790
+    broken = stdenv.hostPlatform.isDarwin; # https://github.com/NixOS/nixpkgs/pull/52658#issuecomment-449565790
   };
 }
diff --git a/pkgs/applications/printing/pappl/default.nix b/pkgs/applications/printing/pappl/default.nix
index 02c4e74eb855..abeb83c9271c 100644
--- a/pkgs/applications/printing/pappl/default.nix
+++ b/pkgs/applications/printing/pappl/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     libpng
     libusb1
     zlib
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     # upstream mentions these are not needed for Mac
     # see: https://github.com/michaelrsweet/pappl#requirements
     avahi
diff --git a/pkgs/applications/radio/airspy/default.nix b/pkgs/applications/radio/airspy/default.nix
index 6cb0f40f129a..3c1fa511aef7 100644
--- a/pkgs/applications/radio/airspy/default.nix
+++ b/pkgs/applications/radio/airspy/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libusb1 ];
 
   cmakeFlags =
-    lib.optionals stdenv.isLinux [ "-DINSTALL_UDEV_RULES=ON" ];
+    lib.optionals stdenv.hostPlatform.isLinux [ "-DINSTALL_UDEV_RULES=ON" ];
 
   meta = with lib; {
     homepage = "https://github.com/airspy/airspyone_host";
diff --git a/pkgs/applications/radio/csdr/default.nix b/pkgs/applications/radio/csdr/default.nix
index af05cb61e836..65bbdbb05dac 100644
--- a/pkgs/applications/radio/csdr/default.nix
+++ b/pkgs/applications/radio/csdr/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     libsamplerate
   ];
 
-  hardeningDisable = lib.optional stdenv.isAarch64 "format";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isAarch64 "format";
 
   postFixup = ''
     substituteInPlace "$out"/lib/pkgconfig/csdr.pc \
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     description = "Simple DSP library and command-line tool for Software Defined Radio";
     license = licenses.gpl3Only;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = teams.c3d2.members;
   };
 }
diff --git a/pkgs/applications/radio/cubicsdr/default.nix b/pkgs/applications/radio/cubicsdr/default.nix
index 839fc9ceaaa1..2677795dc0ed 100644
--- a/pkgs/applications/radio/cubicsdr/default.nix
+++ b/pkgs/applications/radio/cubicsdr/default.nix
@@ -24,8 +24,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
 
   buildInputs = [ fftw hamlib liquid-dsp soapysdr-with-plugins wxGTK32 ]
-    ++ lib.optionals stdenv.isLinux [ libpulseaudio libGL libX11 ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa WebKit ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libpulseaudio libGL libX11 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa WebKit ];
 
   cmakeFlags = [ "-DUSE_HAMLIB=ON" ]
     ++ lib.optional enableDigitalLab "-DENABLE_DIGITAL_LAB=ON";
diff --git a/pkgs/applications/radio/direwolf/default.nix b/pkgs/applications/radio/direwolf/default.nix
index e55f895d24af..6cd591fcbda6 100644
--- a/pkgs/applications/radio/direwolf/default.nix
+++ b/pkgs/applications/radio/direwolf/default.nix
@@ -30,8 +30,8 @@ stdenv.mkDerivation rec {
 
   strictDeps = true;
 
-  buildInputs = lib.optionals stdenv.isLinux [ alsa-lib udev ]
-    ++ lib.optionals stdenv.isDarwin [ portaudio ]
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib udev ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ portaudio ]
     ++ lib.optionals gpsdSupport [ gpsd ]
     ++ lib.optionals hamlibSupport [ hamlib ]
     ++ lib.optionals extraScripts [ python3 perl espeak ];
diff --git a/pkgs/applications/radio/dump1090/default.nix b/pkgs/applications/radio/dump1090/default.nix
index 39c7f832e09f..c34e18be8696 100644
--- a/pkgs/applications/radio/dump1090/default.nix
+++ b/pkgs/applications/radio/dump1090/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     ncurses
     rtl-sdr
     soapysdr-with-plugins
-  ] ++ lib.optional stdenv.isLinux limesuite;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux limesuite;
 
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang
     "-Wno-implicit-function-declaration -Wno-int-conversion -Wno-unknown-warning-option";
diff --git a/pkgs/applications/radio/fldigi/default.nix b/pkgs/applications/radio/fldigi/default.nix
index 2390a4f8c081..0a7edb7aed6a 100644
--- a/pkgs/applications/radio/fldigi/default.nix
+++ b/pkgs/applications/radio/fldigi/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     portaudio
     libsndfile
     libsamplerate
-  ] ++ lib.optionals (stdenv.isLinux) [ libpulseaudio alsa-lib udev ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [ libpulseaudio alsa-lib udev ];
 
   env.CXXFLAGS = lib.optionalString stdenv.cc.isClang "-std=c++14";
 
diff --git a/pkgs/applications/radio/flex-ndax/default.nix b/pkgs/applications/radio/flex-ndax/default.nix
index ff2aedf6005e..e45604856a59 100644
--- a/pkgs/applications/radio/flex-ndax/default.nix
+++ b/pkgs/applications/radio/flex-ndax/default.nix
@@ -16,7 +16,7 @@ buildGoModule rec {
   vendorHash = "sha256-05LWJm4MoJqjJaFrBZvutKlqSTGl4dSp433AfHHO6LU=";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/kc2g-flex-tools/nDAX";
     description = "FlexRadio digital audio transport (DAX) connector for PulseAudio";
     license = licenses.mit;
diff --git a/pkgs/applications/radio/freedv/default.nix b/pkgs/applications/radio/freedv/default.nix
index 27da63dd4022..d53f67031600 100644
--- a/pkgs/applications/radio/freedv/default.nix
+++ b/pkgs/applications/radio/freedv/default.nix
@@ -16,7 +16,7 @@
 , hamlib_4
 , wxGTK32
 , sioclient
-, pulseSupport ? config.pulseaudio or stdenv.isLinux
+, pulseSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux
 , AppKit
 , AVFoundation
 , Cocoa
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-oFuAH81mduiSQGIDgDDy1IPskqqCBmfWbpqQstUIw9g=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace-fail "-Wl,-ld_classic" ""
     substituteInPlace src/CMakeLists.txt \
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     macdylibbundler
     makeWrapper
     darwin.autoSignDarwinBinariesHook
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     wxGTK32
     sioclient
   ] ++ (if pulseSupport then [ libpulseaudio ] else [ portaudio ])
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     AVFoundation
     Cocoa
@@ -74,13 +74,13 @@ stdenv.mkDerivation rec {
     "-DUSE_PULSEAUDIO:BOOL=${if pulseSupport then "TRUE" else "FALSE"}"
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "-DAPPLE_OLD_XCODE"
   ]);
 
   doCheck = true;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/FreeDV.app $out/Applications
     makeWrapper $out/Applications/FreeDV.app/Contents/MacOS/FreeDV $out/bin/freedv
diff --git a/pkgs/applications/radio/gnuradio/3.8.nix b/pkgs/applications/radio/gnuradio/3.8.nix
index 67cc2d6c8ebf..b611ef66b825 100644
--- a/pkgs/applications/radio/gnuradio/3.8.nix
+++ b/pkgs/applications/radio/gnuradio/3.8.nix
@@ -150,8 +150,8 @@ let
     };
     gr-audio = {
       runtime = []
-        ++ lib.optionals stdenv.isLinux [ alsa-lib libjack2 ]
-        ++ lib.optionals stdenv.isDarwin [ CoreAudio ]
+        ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libjack2 ]
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreAudio ]
       ;
       cmakeEnableFlag = "GR_AUDIO";
     };
diff --git a/pkgs/applications/radio/gnuradio/default.nix b/pkgs/applications/radio/gnuradio/default.nix
index e7efa57428b8..f9113b0a23c3 100644
--- a/pkgs/applications/radio/gnuradio/default.nix
+++ b/pkgs/applications/radio/gnuradio/default.nix
@@ -170,8 +170,8 @@ let
     };
     gr-audio = {
       runtime = []
-        ++ lib.optionals stdenv.isLinux [ alsa-lib libjack2 ]
-        ++ lib.optionals stdenv.isDarwin [ CoreAudio ]
+        ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libjack2 ]
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreAudio ]
       ;
       cmakeEnableFlag = "GR_AUDIO";
     };
diff --git a/pkgs/applications/radio/gnuradio/shared.nix b/pkgs/applications/radio/gnuradio/shared.nix
index fe75f6037f37..75a2a97e0d22 100644
--- a/pkgs/applications/radio/gnuradio/shared.nix
+++ b/pkgs/applications/radio/gnuradio/shared.nix
@@ -88,7 +88,7 @@ in {
       remove-references-to -t ${stdenv.cc} $(readlink -f $out/lib/libgnuradio-runtime${stdenv.hostPlatform.extensions.sharedLibrary})
     ''
     # Clang references in InstalledDir
-    + lib.optionalString (hasFeature "gnuradio-runtime" && stdenv.isDarwin) ''
+    + lib.optionalString (hasFeature "gnuradio-runtime" && stdenv.hostPlatform.isDarwin) ''
       remove-references-to -t ${stdenv.cc.cc} $(readlink -f $out/lib/libgnuradio-runtime${stdenv.hostPlatform.extensions.sharedLibrary})
     ''
   ;
@@ -116,7 +116,7 @@ in {
   dontWrapQtApps = true;
   # On darwin, it requires playing with DYLD_FALLBACK_LIBRARY_PATH to make if
   # find libgnuradio-runtim.3.*.dylib .
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   preCheck = ''
     export HOME=$(mktemp -d)
     export QT_QPA_PLATFORM=offscreen
diff --git a/pkgs/applications/radio/gnuradio/wrapper.nix b/pkgs/applications/radio/gnuradio/wrapper.nix
index f468aadb27b5..4ffe42593ec5 100644
--- a/pkgs/applications/radio/gnuradio/wrapper.nix
+++ b/pkgs/applications/radio/gnuradio/wrapper.nix
@@ -127,7 +127,7 @@ let
             unwrapped.qt.qtbase.qtPluginPrefix
             (builtins.map lib.getBin ([
               unwrapped.qt.qtbase
-            ] ++ lib.optionals stdenv.isLinux [
+            ] ++ lib.optionals stdenv.hostPlatform.isLinux [
               unwrapped.qt.qtwayland
             ]))
           }"
@@ -137,7 +137,7 @@ let
             unwrapped.qt.qtbase.qtQmlPrefix
             (builtins.map lib.getBin ([
               unwrapped.qt.qtbase
-            ] ++ lib.optionals stdenv.isLinux [
+            ] ++ lib.optionals stdenv.hostPlatform.isLinux [
               unwrapped.qt.qtwayland
             ]))
           }"
diff --git a/pkgs/applications/radio/limesuite/default.nix b/pkgs/applications/radio/limesuite/default.nix
index d8d7bcd22d0a..9190896d8e11 100644
--- a/pkgs/applications/radio/limesuite/default.nix
+++ b/pkgs/applications/radio/limesuite/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     gnuplot
     libusb1
     soapysdr
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     GLUT
   ] ++ lib.optionals withGui [
     fltk
diff --git a/pkgs/applications/radio/m17-cxx-demod/default.nix b/pkgs/applications/radio/m17-cxx-demod/default.nix
index d6663fbc4287..47a7d103e76c 100644
--- a/pkgs/applications/radio/m17-cxx-demod/default.nix
+++ b/pkgs/applications/radio/m17-cxx-demod/default.nix
@@ -31,6 +31,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = teams.c3d2.members;
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/radio/multimon-ng/default.nix b/pkgs/applications/radio/multimon-ng/default.nix
index 70f3da3118c1..f71af7e64862 100644
--- a/pkgs/applications/radio/multimon-ng/default.nix
+++ b/pkgs/applications/radio/multimon-ng/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-irKpVerxzjJIiLofoTdySk/PzojuVLgMq2DYF0qPaAM=";
   };
 
-  buildInputs = lib.optionals stdenv.isLinux [ libpulseaudio libX11 ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libpulseaudio libX11 ];
 
   nativeBuildInputs = [ cmake makeWrapper ];
 
diff --git a/pkgs/applications/radio/pat/default.nix b/pkgs/applications/radio/pat/default.nix
index 267be192f44f..1f1140e5fd4b 100644
--- a/pkgs/applications/radio/pat/default.nix
+++ b/pkgs/applications/radio/pat/default.nix
@@ -25,11 +25,11 @@ buildGoModule rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optional stdenv.isLinux [ libax25 ];
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux [ libax25 ];
 
   # Needed by wl2k-go go module for libax25 to include support for Linux' AX.25 stack by linking against libax25.
   # ref: https://github.com/la5nta/wl2k-go/blob/abe3ae5bf6a2eec670a21672d461d1c3e1d4c2f3/transport/ax25/ax25.go#L11-L17
-  tags = lib.optionals stdenv.isLinux [ "libax25" ];
+  tags = lib.optionals stdenv.hostPlatform.isLinux [ "libax25" ];
 
   postInstall = ''
     installManPage man/pat-configure.1 man/pat.1
diff --git a/pkgs/applications/radio/qdmr/default.nix b/pkgs/applications/radio/qdmr/default.nix
index 2ebc0d30ff6c..442828a76302 100644
--- a/pkgs/applications/radio/qdmr/default.nix
+++ b/pkgs/applications/radio/qdmr/default.nix
@@ -16,7 +16,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/applications/radio/qlog/default.nix b/pkgs/applications/radio/qlog/default.nix
index 86da4b081ee4..dacdfcbb2704 100644
--- a/pkgs/applications/radio/qlog/default.nix
+++ b/pkgs/applications/radio/qlog/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     qtwebchannel
     hamlib
     qtkeychain
-  ] ++ (lib.optionals stdenv.isDarwin [
+  ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [
     cups
   ]);
 
diff --git a/pkgs/applications/radio/rtl-sdr/default.nix b/pkgs/applications/radio/rtl-sdr/default.nix
index f0bbba9b0a3b..6cb25feb980b 100644
--- a/pkgs/applications/radio/rtl-sdr/default.nix
+++ b/pkgs/applications/radio/rtl-sdr/default.nix
@@ -13,7 +13,7 @@ let
       nativeBuildInputs = [ pkg-config cmake ];
       propagatedBuildInputs = [ libusb1 ];
 
-      cmakeFlags = lib.optionals stdenv.isLinux [
+      cmakeFlags = lib.optionals stdenv.hostPlatform.isLinux [
         "-DINSTALL_UDEV_RULES=ON"
         "-DWITH_RPC=ON"
       ];
diff --git a/pkgs/applications/radio/sdrplay/default.nix b/pkgs/applications/radio/sdrplay/default.nix
index 9d9ee298e09c..d19ed4b02794 100644
--- a/pkgs/applications/radio/sdrplay/default.nix
+++ b/pkgs/applications/radio/sdrplay/default.nix
@@ -1,9 +1,9 @@
 { stdenv, lib, fetchurl, autoPatchelfHook, udev, libusb1 }:
 let
   arch =
-    if stdenv.isx86_64 then "x86_64"
-    else if stdenv.isi686 then "i686"
-    else if stdenv.isAarch64 then "aarch64"
+    if stdenv.hostPlatform.isx86_64 then "x86_64"
+    else if stdenv.hostPlatform.isi686 then "i686"
+    else if stdenv.hostPlatform.isAarch64 then "aarch64"
     else throw "unsupported architecture";
 
   version = "3.07.1";
diff --git a/pkgs/applications/radio/sdrpp/default.nix b/pkgs/applications/radio/sdrpp/default.nix
index 3ce8f1f7f4ff..151a967d943f 100644
--- a/pkgs/applications/radio/sdrpp/default.nix
+++ b/pkgs/applications/radio/sdrpp/default.nix
@@ -8,7 +8,7 @@
 , hackrf_source ? true, hackrf
 , limesdr_source ? true, limesuite
 , perseus_source ? false    # needs libperseus-sdr, not yet available in nixpks
-, plutosdr_source ? stdenv.isLinux, libiio, libad9361
+, plutosdr_source ? stdenv.hostPlatform.isLinux, libiio, libad9361
 , rfspace_source ? true
 , rtl_sdr_source ? true, rtl-sdr-osmocom, libusb1  # osmocom better w/ rtlsdr v4
 , rtl_tcp_source ? true
@@ -70,8 +70,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
 
   buildInputs = [ glfw glew fftwFloat volk zstd ]
-    ++ lib.optional stdenv.isDarwin AppKit
-    ++ lib.optional stdenv.isLinux libX11
+    ++ lib.optional stdenv.hostPlatform.isDarwin AppKit
+    ++ lib.optional stdenv.hostPlatform.isLinux libX11
     ++ lib.optional airspy_source airspy
     ++ lib.optional airspyhf_source airspyhf
     ++ lib.optional bladerf_source libbladeRF
diff --git a/pkgs/applications/radio/soapyairspy/default.nix b/pkgs/applications/radio/soapyairspy/default.nix
index 289a20d281cc..9d198ad15eb3 100644
--- a/pkgs/applications/radio/soapyairspy/default.nix
+++ b/pkgs/applications/radio/soapyairspy/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ airspy soapysdr ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
diff --git a/pkgs/applications/radio/soapyaudio/default.nix b/pkgs/applications/radio/soapyaudio/default.nix
index 7434791b69f0..86921754d6b6 100644
--- a/pkgs/applications/radio/soapyaudio/default.nix
+++ b/pkgs/applications/radio/soapyaudio/default.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ hamlib rtaudio libjack2 libusb1 soapysdr ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib libpulseaudio ]
-    ++ lib.optionals stdenv.isDarwin [ Accelerate CoreAudio ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libpulseaudio ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Accelerate CoreAudio ];
 
   cmakeFlags = [
     "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/"
diff --git a/pkgs/applications/radio/soapybladerf/default.nix b/pkgs/applications/radio/soapybladerf/default.nix
index 0f2b445b960e..15c46507350c 100644
--- a/pkgs/applications/radio/soapybladerf/default.nix
+++ b/pkgs/applications/radio/soapybladerf/default.nix
@@ -19,7 +19,7 @@ in stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ libbladeRF soapysdr ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
diff --git a/pkgs/applications/radio/soapyhackrf/default.nix b/pkgs/applications/radio/soapyhackrf/default.nix
index be621c0d3135..3f385a4b7255 100644
--- a/pkgs/applications/radio/soapyhackrf/default.nix
+++ b/pkgs/applications/radio/soapyhackrf/default.nix
@@ -19,7 +19,7 @@ in stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ hackrf soapysdr ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
diff --git a/pkgs/applications/radio/soapyremote/default.nix b/pkgs/applications/radio/soapyremote/default.nix
index c6e7cddd0903..4191b8ae95ce 100644
--- a/pkgs/applications/radio/soapyremote/default.nix
+++ b/pkgs/applications/radio/soapyremote/default.nix
@@ -19,7 +19,7 @@ in stdenv.mkDerivation {
 
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [ "-include sys/select.h" ]);
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [ "-include sys/select.h" ]);
 
   meta = with lib; {
     homepage = "https://github.com/pothosware/SoapyRemote";
diff --git a/pkgs/applications/radio/soapyrtlsdr/default.nix b/pkgs/applications/radio/soapyrtlsdr/default.nix
index 80ea41e4f950..f0a5194a4a9e 100644
--- a/pkgs/applications/radio/soapyrtlsdr/default.nix
+++ b/pkgs/applications/radio/soapyrtlsdr/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ rtl-sdr soapysdr ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
diff --git a/pkgs/applications/radio/soapyuhd/default.nix b/pkgs/applications/radio/soapyuhd/default.nix
index 9220df3f5f94..de7b7be855ec 100644
--- a/pkgs/applications/radio/soapyuhd/default.nix
+++ b/pkgs/applications/radio/soapyuhd/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ uhd boost soapysdr ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
diff --git a/pkgs/applications/radio/splat/default.nix b/pkgs/applications/radio/splat/default.nix
index 59d0fc1fdeb0..1bf4e738c713 100644
--- a/pkgs/applications/radio/splat/default.nix
+++ b/pkgs/applications/radio/splat/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description =
       "SPLAT! is an RF Signal Propagation, Loss, And Terrain analysis tool for the electromagnetic spectrum between 20 MHz and 20 GHz";
     license = licenses.gpl2Only;
diff --git a/pkgs/applications/radio/ubertooth/default.nix b/pkgs/applications/radio/ubertooth/default.nix
index 62e645fb6df8..2d8b9f857938 100644
--- a/pkgs/applications/radio/ubertooth/default.nix
+++ b/pkgs/applications/radio/ubertooth/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ libbtbb libpcap libusb1 bluez ];
 
-  cmakeFlags = lib.optionals stdenv.isLinux [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isLinux [
     "-DINSTALL_UDEV_RULES=TRUE"
     "-DUDEV_RULES_PATH=etc/udev/rules.d"
     "-DUDEV_RULES_GROUP=${udevGroup}"
diff --git a/pkgs/applications/radio/uhd/default.nix b/pkgs/applications/radio/uhd/default.nix
index 947d7d48108d..ce668c45300f 100644
--- a/pkgs/applications/radio/uhd/default.nix
+++ b/pkgs/applications/radio/uhd/default.nix
@@ -139,7 +139,7 @@ stdenv.mkDerivation (finalAttrs: {
     # TODO: Check if this still needed
     # ABI differences GCC 7.1
     # /nix/store/wd6r25miqbk9ia53pp669gn4wrg9n9cj-gcc-7.3.0/include/c++/7.3.0/bits/vector.tcc:394:7: note: parameter passing for argument of type 'std::vector<uhd::range_t>::iterator {aka __gnu_cxx::__normal_iterator<uhd::range_t*, std::vector<uhd::range_t> >}' changed in GCC 7.1
-  ] ++ optionals stdenv.isAarch32 [
+  ] ++ optionals stdenv.hostPlatform.isAarch32 [
     "-DCMAKE_CXX_FLAGS=-Wno-psabi"
   ];
 
@@ -163,7 +163,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # many tests fails on darwin, according to ofborg
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # Build only the host software
   preConfigure = "cd host";
diff --git a/pkgs/applications/science/astronomy/gildas/default.nix b/pkgs/applications/science/astronomy/gildas/default.nix
index 3b31f069b0e4..eafc631ef92c 100644
--- a/pkgs/applications/science/astronomy/gildas/default.nix
+++ b/pkgs/applications/science/astronomy/gildas/default.nix
@@ -22,17 +22,17 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config groff perl getopt gfortran which ];
 
   buildInputs = [ gtk2-x11 lesstif cfitsio python3Env ncurses ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation ]);
 
   patches = [ ./wrapper.patch ]
-    ++ lib.optionals stdenv.isDarwin ([ ./clang.patch ./cpp-darwin.patch ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin ([ ./clang.patch ./cpp-darwin.patch ]);
 
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-unused-command-line-argument";
 
   # Workaround for https://github.com/NixOS/nixpkgs/issues/304528
-  env.GAG_CPP = lib.optionalString stdenv.isDarwin "${gfortran.outPath}/bin/cpp";
+  env.GAG_CPP = lib.optionalString stdenv.hostPlatform.isDarwin "${gfortran.outPath}/bin/cpp";
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin (with darwin.apple_sdk.frameworks; "-F${CoreFoundation}/Library/Frameworks");
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; "-F${CoreFoundation}/Library/Frameworks");
 
   configurePhase=''
     substituteInPlace admin/wrapper.sh --replace '%%OUT%%' $out
diff --git a/pkgs/applications/science/astronomy/gravit/default.nix b/pkgs/applications/science/astronomy/gravit/default.nix
index 070ce96fd577..b734ea9750dc 100644
--- a/pkgs/applications/science/astronomy/gravit/default.nix
+++ b/pkgs/applications/science/astronomy/gravit/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://github.com/gak/gravit";
     description = "Beautiful OpenGL-based gravity simulator";
     mainProgram = "gravit";
diff --git a/pkgs/applications/science/astronomy/stellarium/default.nix b/pkgs/applications/science/astronomy/stellarium/default.nix
index 87118beec99f..7ddaf5357e7c 100644
--- a/pkgs/applications/science/astronomy/stellarium/default.nix
+++ b/pkgs/applications/science/astronomy/stellarium/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation (finalAttrs: {
     })
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace 'SET(CMAKE_INSTALL_PREFIX "''${PROJECT_BINARY_DIR}/Stellarium.app/Contents")' \
                 'SET(CMAKE_INSTALL_PREFIX "${placeholder "out"}/Applications/Stellarium.app/Contents")'
@@ -72,22 +72,22 @@ stdenv.mkDerivation (finalAttrs: {
     libnova
     exiv2
     nlopt
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
   preConfigure = ''
     export SOURCE_DATE_EPOCH=$(date -d 20${lib.versions.major finalAttrs.version}0101 +%s)
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export LC_ALL=en_US.UTF-8
   '';
 
   # fatal error: 'QtSerialPort/QSerialPortInfo' file not found
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-F${qtserialport}/lib";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-F${qtserialport}/lib";
 
   dontWrapGApps = true;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     makeWrapper $out/Applications/Stellarium.app/Contents/MacOS/Stellarium $out/bin/stellarium
   '';
 
diff --git a/pkgs/applications/science/biology/ants/default.nix b/pkgs/applications/science/biology/ants/default.nix
index 21dbf69407f2..b42eb791d27f 100644
--- a/pkgs/applications/science/biology/ants/default.nix
+++ b/pkgs/applications/science/biology/ants/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     itk
     vtk
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
diff --git a/pkgs/applications/science/biology/blast/bin.nix b/pkgs/applications/science/biology/blast/bin.nix
index 48537a568e4b..1e3975f9f5ff 100644
--- a/pkgs/applications/science/biology/blast/bin.nix
+++ b/pkgs/applications/science/biology/blast/bin.nix
@@ -35,9 +35,9 @@ in
 stdenv.mkDerivation {
   inherit pname version src;
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
-  buildInputs = [ python3 perl ] ++ lib.optionals stdenv.isLinux [ zlib bzip2 glib libxml2 ];
+  buildInputs = [ python3 perl ] ++ lib.optionals stdenv.hostPlatform.isLinux [ zlib bzip2 glib libxml2 ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/applications/science/biology/blast/default.nix b/pkgs/applications/science/biology/blast/default.nix
index 407d38970b0f..791d6049ad6d 100644
--- a/pkgs/applications/science/biology/blast/default.nix
+++ b/pkgs/applications/science/biology/blast/default.nix
@@ -81,7 +81,7 @@ stdenv.mkDerivation rec {
   # perl is necessary in buildInputs so that installed perl scripts get patched
   # correctly
   buildInputs = [ coreutils perl gawk zlib bzip2 cpio ]
-    ++ lib.optionals stdenv.isDarwin [ ApplicationServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ ApplicationServices ];
   hardeningDisable = [ "format" ];
 
   postInstall = ''
diff --git a/pkgs/applications/science/biology/bwa-mem2/default.nix b/pkgs/applications/science/biology/bwa-mem2/default.nix
index c339baf446d2..0a2d2c8d2052 100644
--- a/pkgs/applications/science/biology/bwa-mem2/default.nix
+++ b/pkgs/applications/science/biology/bwa-mem2/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [ zlib ];
 
   # see https://github.com/bwa-mem2/bwa-mem2/issues/93
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's/memset_s/memset8_s/g' ext/safestringlib/include/safe_mem_lib.h
     sed -i 's/memset_s/memset8_s/g' ext/safestringlib/safeclib/memset16_s.c
     sed -i 's/memset_s/memset8_s/g' ext/safestringlib/safeclib/memset32_s.c
diff --git a/pkgs/applications/science/biology/cmtk/default.nix b/pkgs/applications/science/biology/cmtk/default.nix
index d7d23dd2d46e..1263f8194c9f 100644
--- a/pkgs/applications/science/biology/cmtk/default.nix
+++ b/pkgs/applications/science/biology/cmtk/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
   env.NIX_CFLAGS_COMPILE = toString [
     (lib.optionalString stdenv.cc.isGNU "-std=c++11")
     (lib.optionalString stdenv.cc.isClang "-Wno-error=c++11-narrowing")
-    (lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-Dfinite=isfinite")
+    (lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-Dfinite=isfinite")
   ];
 
   meta = with lib; {
diff --git a/pkgs/applications/science/biology/delly/default.nix b/pkgs/applications/science/biology/delly/default.nix
index 34ea942b4f5c..ec1f8612cc34 100644
--- a/pkgs/applications/science/biology/delly/default.nix
+++ b/pkgs/applications/science/biology/delly/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation (finalAttrs: {
     htslib
     xz
     zlib
-  ] ++ lib.optional stdenv.isDarwin llvmPackages.openmp;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   makeFlags = [
     "EBROOTHTSLIB=${htslib}"
diff --git a/pkgs/applications/science/biology/iqtree/default.nix b/pkgs/applications/science/biology/iqtree/default.nix
index a3ac4eb542f0..ce6218449a7e 100644
--- a/pkgs/applications/science/biology/iqtree/default.nix
+++ b/pkgs/applications/science/biology/iqtree/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     boost
     eigen
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.openmp
   ];
 
diff --git a/pkgs/applications/science/biology/iv/default.nix b/pkgs/applications/science/biology/iv/default.nix
index ba1b91298bb3..a4b408b14a01 100644
--- a/pkgs/applications/science/biology/iv/default.nix
+++ b/pkgs/applications/science/biology/iv/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
         break
       fi
     done
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --add-needed ${libX11}/lib/libX11.so $out/lib/libIVhines.so
   '';
 
diff --git a/pkgs/applications/science/biology/migrate/default.nix b/pkgs/applications/science/biology/migrate/default.nix
index 53fc80777612..aceb010875d7 100644
--- a/pkgs/applications/science/biology/migrate/default.nix
+++ b/pkgs/applications/science/biology/migrate/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Estimates population size, migration, population splitting parameters using genetic/genomic data";
     homepage = "https://peterbeerli.com/migrate-html5/index.html";
     license = licenses.mit;
diff --git a/pkgs/applications/science/biology/minimap2/default.nix b/pkgs/applications/science/biology/minimap2/default.nix
index 5597b5504678..1c523a909241 100644
--- a/pkgs/applications/science/biology/minimap2/default.nix
+++ b/pkgs/applications/science/biology/minimap2/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ zlib ];
 
-  makeFlags = lib.optionals stdenv.isAarch64 [ "arm_neon=1" "aarch64=1" ];
+  makeFlags = lib.optionals stdenv.hostPlatform.isAarch64 [ "arm_neon=1" "aarch64=1" ];
 
   installPhase = ''
     mkdir -p $out/bin
diff --git a/pkgs/applications/science/biology/mrtrix/default.nix b/pkgs/applications/science/biology/mrtrix/default.nix
index 64eafa0f6968..e17aa3ca038c 100644
--- a/pkgs/applications/science/biology/mrtrix/default.nix
+++ b/pkgs/applications/science/biology/mrtrix/default.nix
@@ -102,7 +102,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://github.com/MRtrix3/mrtrix3";
     description = "Suite of tools for diffusion imaging";
     maintainers = with maintainers; [ bcdarwin ];
diff --git a/pkgs/applications/science/biology/muscle/default.nix b/pkgs/applications/science/biology/muscle/default.nix
index 86067538b13c..33a56d6e26d6 100644
--- a/pkgs/applications/science/biology/muscle/default.nix
+++ b/pkgs/applications/science/biology/muscle/default.nix
@@ -20,7 +20,7 @@ gccStdenv.mkDerivation rec {
   installPhase =
     let
       target =
-        if gccStdenv.isDarwin
+        if gccStdenv.hostPlatform.isDarwin
         then "Darwin"
         else "Linux";
     in
diff --git a/pkgs/applications/science/biology/nest/default.nix b/pkgs/applications/science/biology/nest/default.nix
index 96418346eeb9..9714f015f71a 100644
--- a/pkgs/applications/science/biology/nest/default.nix
+++ b/pkgs/applications/science/biology/nest/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     python3
     python3.pkgs.cython
   ] ++ lib.optional withMpi mpi
-    ++ lib.optional stdenv.isDarwin llvmPackages.openmp;
+    ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   propagatedBuildInputs = with python3.pkgs; [
     numpy
diff --git a/pkgs/applications/science/biology/neuron/default.nix b/pkgs/applications/science/biology/neuron/default.nix
index e54d3c9ba7a1..fe5de3c68fab 100644
--- a/pkgs/applications/science/biology/neuron/default.nix
+++ b/pkgs/applications/science/biology/neuron/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
     flex
     git
   ] ++ optionals useCore [ perl gsl ]
-  ++ optionals stdenv.isDarwin [ xcbuild ];
+  ++ optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   buildInputs = optionals useIv [
     xorg.libX11.dev
diff --git a/pkgs/applications/science/biology/obitools/obitools3.nix b/pkgs/applications/science/biology/obitools/obitools3.nix
index f415c9c39141..53aa177307df 100644
--- a/pkgs/applications/science/biology/obitools/obitools3.nix
+++ b/pkgs/applications/science/biology/obitools/obitools3.nix
@@ -11,7 +11,7 @@ python3Packages.buildPythonApplication rec {
 
   nativeBuildInputs = [ python3Packages.cython cmake ];
 
-  postPatch = lib.optionalString stdenv.isAarch64 ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isAarch64 ''
       substituteInPlace setup.py \
       --replace "'-msse2'," ""
   '';
diff --git a/pkgs/applications/science/biology/paml/default.nix b/pkgs/applications/science/biology/paml/default.nix
index f742e33e15cf..1e21d18242bd 100644
--- a/pkgs/applications/science/biology/paml/default.nix
+++ b/pkgs/applications/science/biology/paml/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-P/oHaLxoQzjFuvmHyRdShHv1ayruy6O/I9w8aTyya2s=";
   };
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-D_POSIX_C_SOURCE";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-D_POSIX_C_SOURCE";
 
   preBuild = ''
     cd ./src/
diff --git a/pkgs/applications/science/biology/plink-ng/default.nix b/pkgs/applications/science/biology/plink-ng/default.nix
index b91655ac8fda..b66bed97a94a 100644
--- a/pkgs/applications/science/biology/plink-ng/default.nix
+++ b/pkgs/applications/science/biology/plink-ng/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "1zhffjbwpd50dxywccbnv1rxy9njwz73l4awc5j7i28rgj3davcq";
   };
 
-  buildInputs = [ zlib ] ++ (if stdenv.isDarwin then [ darwin.apple_sdk.frameworks.Accelerate ] else [ blas lapack ]) ;
+  buildInputs = [ zlib ] ++ (if stdenv.hostPlatform.isDarwin then [ darwin.apple_sdk.frameworks.Accelerate ] else [ blas lapack ]) ;
 
   preBuild = ''
     sed -i 's|zlib-1.2.8/zlib.h|zlib.h|g' *.c *.h
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Comprehensive update to the PLINK association analysis toolset";
     mainProgram = "plink";
     homepage = "https://www.cog-genomics.org/plink2";
diff --git a/pkgs/applications/science/biology/repseek/default.nix b/pkgs/applications/science/biology/repseek/default.nix
index e5e0193f7911..9b38171b34ef 100644
--- a/pkgs/applications/science/biology/repseek/default.nix
+++ b/pkgs/applications/science/biology/repseek/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     substituteInPlace Makefile \
       --replace "INSTALLDIR = \$\$HOME/bin" "INSTALLDIR = $out/bin/" \
       --replace "CC= gcc" "CC = $CC"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace Makefile --replace "MACHINE = MACOSX" "MACHINE = LINUX"
   '';
 
diff --git a/pkgs/applications/science/biology/sortmerna/default.nix b/pkgs/applications/science/biology/sortmerna/default.nix
index c19556318843..b6291ea85297 100644
--- a/pkgs/applications/science/biology/sortmerna/default.nix
+++ b/pkgs/applications/science/biology/sortmerna/default.nix
@@ -56,6 +56,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.x86_64;
     homepage = "https://bioinfo.lifl.fr/RNA/sortmerna/";
     maintainers = with maintainers; [ luispedro ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/science/biology/subread/default.nix b/pkgs/applications/science/biology/subread/default.nix
index 62ea61af9192..d2ee518883b5 100644
--- a/pkgs/applications/science/biology/subread/default.nix
+++ b/pkgs/applications/science/biology/subread/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   configurePhase = ''
     cd src
-    cp Makefile.${if stdenv.isLinux then "Linux" else "MacOS"} Makefile
+    cp Makefile.${if stdenv.hostPlatform.isLinux then "Linux" else "MacOS"} Makefile
   '';
 
   makeFlags = [ "CC_EXEC=cc" ];
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "High-performance read alignment, quantification and mutation discovery";
     license = licenses.gpl3;
     maintainers = with maintainers; [ jbedo ];
diff --git a/pkgs/applications/science/biology/svaba/default.nix b/pkgs/applications/science/biology/svaba/default.nix
index fec5a5a3b92d..cdb6c4f9c8aa 100644
--- a/pkgs/applications/science/biology/svaba/default.nix
+++ b/pkgs/applications/science/biology/svaba/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Structural variant and INDEL caller for DNA sequencing data, using genome-wide local assembly";
     mainProgram = "svaba";
     license = licenses.gpl3;
diff --git a/pkgs/applications/science/biology/whisper/default.nix b/pkgs/applications/science/biology/whisper/default.nix
index a69b39f4e089..6c8bb21df6a5 100644
--- a/pkgs/applications/science/biology/whisper/default.nix
+++ b/pkgs/applications/science/biology/whisper/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Short read sequence mapper";
     license = licenses.gpl3;
     homepage = "https://github.com/refresh-bio/whisper";
diff --git a/pkgs/applications/science/chemistry/apbs/default.nix b/pkgs/applications/science/chemistry/apbs/default.nix
index ec8f8e7ffbf6..766e4dcbd557 100644
--- a/pkgs/applications/science/chemistry/apbs/default.nix
+++ b/pkgs/applications/science/chemistry/apbs/default.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation (finalAttrs: {
     suitesparse
     blas
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libintl
     libiconv
   ];
diff --git a/pkgs/applications/science/chemistry/autodock-vina/default.nix b/pkgs/applications/science/chemistry/autodock-vina/default.nix
index d56b8a02a20d..844fe5fea7ed 100644
--- a/pkgs/applications/science/chemistry/autodock-vina/default.nix
+++ b/pkgs/applications/science/chemistry/autodock-vina/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [
     boost'
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     glibc.static
   ];
 
diff --git a/pkgs/applications/science/chemistry/element/default.nix b/pkgs/applications/science/chemistry/element/default.nix
index cc80cb058d92..dc03eac51028 100644
--- a/pkgs/applications/science/chemistry/element/default.nix
+++ b/pkgs/applications/science/chemistry/element/default.nix
@@ -19,6 +19,6 @@ buildGoModule rec {
     homepage = "https://github.com/gennaro-tedesco/element";
     license = licenses.asl20;
     maintainers = [ maintainers.j0hax ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/science/chemistry/ergoscf/default.nix b/pkgs/applications/science/chemistry/ergoscf/default.nix
index 3ee33cf19b74..ceaeb3336427 100644
--- a/pkgs/applications/science/chemistry/ergoscf/default.nix
+++ b/pkgs/applications/science/chemistry/ergoscf/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   configureFlags = [
     "--enable-linalgebra-templates"
     "--enable-performance"
-  ] ++ lib.optional stdenv.isx86_64 "--enable-sse-intrinsics";
+  ] ++ lib.optional stdenv.hostPlatform.isx86_64 "--enable-sse-intrinsics";
 
   LDFLAGS = "-lblas -llapack";
 
diff --git a/pkgs/applications/science/chemistry/gwyddion/default.nix b/pkgs/applications/science/chemistry/gwyddion/default.nix
index 9e64ee7afe4d..c7440e3fad81 100644
--- a/pkgs/applications/science/chemistry/gwyddion/default.nix
+++ b/pkgs/applications/science/chemistry/gwyddion/default.nix
@@ -11,7 +11,7 @@
   zlibSupport ? true, zlib,
   libuniqueSupport ? true, libunique,
   libpngSupport ? true, libpng,
-  openglSupport ? !stdenv.isDarwin, libGL
+  openglSupport ? !stdenv.hostPlatform.isDarwin, libGL
 }:
 
 stdenv.mkDerivation rec {
@@ -60,6 +60,6 @@ stdenv.mkDerivation rec {
     platforms = with lib.platforms; linux ++ darwin;
     maintainers = [ ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/science/computer-architecture/timeloop/default.nix b/pkgs/applications/science/computer-architecture/timeloop/default.nix
index 7fc5da8dfa89..3a70478262d5 100644
--- a/pkgs/applications/science/computer-architecture/timeloop/default.nix
+++ b/pkgs/applications/science/computer-architecture/timeloop/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     yaml-cpp
     ncurses
     accelergy
-   ] ++ lib.optionals stdenv.isLinux [ gpm ];
+   ] ++ lib.optionals stdenv.hostPlatform.isLinux [ gpm ];
 
   preConfigure = ''
     cp -r ./pat-public/src/pat ./src/pat
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     substituteInPlace ./SConstruct \
       --replace-fail "env.Replace(AR = \"gcc-ar\")" "pass" \
       --replace-fail "env.Replace(RANLIB = \"gcc-ranlib\")" "pass"
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # prevent clang from dying on errors that gcc is fine with
     substituteInPlace ./src/SConscript --replace "-Werror" "-Wno-inconsistent-missing-override"
 
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
   sconsFlags =
     # will fail on clang/darwin on link without --static due to undefined extern
     # however, will fail with static on linux as nixpkgs deps aren't static
-    lib.optional stdenv.isDarwin "--static"
+    lib.optional stdenv.hostPlatform.isDarwin "--static"
     ++ lib.optional enableAccelergy "--accelergy"
     ++ lib.optional enableISL "--with-isl";
 
diff --git a/pkgs/applications/science/electronics/dsview/default.nix b/pkgs/applications/science/electronics/dsview/default.nix
index 5d6c83f5dfaa..48a94468ef0b 100644
--- a/pkgs/applications/science/electronics/dsview/default.nix
+++ b/pkgs/applications/science/electronics/dsview/default.nix
@@ -21,12 +21,12 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake pkg-config wrapQtAppsHook ]
-    ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+    ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     boost fftw qtbase qtsvg libusb1 libzip
     python3
-  ] ++ lib.optional stdenv.isLinux qtwayland;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux qtwayland;
 
   meta = with lib; {
     description = "GUI program for supporting various instruments from DreamSourceLab, including logic analyzer, oscilloscope, etc";
diff --git a/pkgs/applications/science/electronics/flopoco/default.nix b/pkgs/applications/science/electronics/flopoco/default.nix
index e15ef3277a66..ef6f297c63cc 100644
--- a/pkgs/applications/science/electronics/flopoco/default.nix
+++ b/pkgs/applications/science/electronics/flopoco/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     sed -i "s/-pg//g" {,src/Apps/TaMaDi/}CMakeLists.txt
   '';
 
diff --git a/pkgs/applications/science/electronics/fritzing/default.nix b/pkgs/applications/science/electronics/fritzing/default.nix
index 9eb7b5044502..04ca24861c0d 100644
--- a/pkgs/applications/science/electronics/fritzing/default.nix
+++ b/pkgs/applications/science/electronics/fritzing/default.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation {
     quazip
     libngspice
     clipper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
@@ -93,7 +93,7 @@ stdenv.mkDerivation {
     "phoenix.pro"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications
     mv $out/bin/Fritzing.app $out/Applications/Fritzing.app
     cp FritzingInfo.plist $out/Applications/Fritzing.app/Contents/Info.plist
diff --git a/pkgs/applications/science/electronics/gtkwave/default.nix b/pkgs/applications/science/electronics/gtkwave/default.nix
index d28a5cf80906..5649b6bb5a77 100644
--- a/pkgs/applications/science/electronics/gtkwave/default.nix
+++ b/pkgs/applications/science/electronics/gtkwave/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config wrapGAppsHook3 ];
   buildInputs = [ bzip2 glib gperf gtk3 judy tcl tk xz ]
-    ++ lib.optional stdenv.isDarwin gtk-mac-integration;
+    ++ lib.optional stdenv.hostPlatform.isDarwin gtk-mac-integration;
 
   # fix compilation under Darwin
   # remove these patches upon next release
diff --git a/pkgs/applications/science/electronics/hal-hardware-analyzer/default.nix b/pkgs/applications/science/electronics/hal-hardware-analyzer/default.nix
index c193352eb455..acf52931c7ed 100644
--- a/pkgs/applications/science/electronics/hal-hardware-analyzer/default.nix
+++ b/pkgs/applications/science/electronics/hal-hardware-analyzer/default.nix
@@ -38,7 +38,7 @@ let
         hash = "sha256-adU5SctH+H54UaAmr5BZInytD3wjUzLtQbCwngAWs4o=";
       })
     ];
-    postPatch = prev.postPatch + lib.optionalString stdenv.isAarch64 ''
+    postPatch = prev.postPatch + lib.optionalString stdenv.hostPlatform.isAarch64 ''
       # https://github.com/igraph/igraph/issues/1694
       substituteInPlace tests/CMakeLists.txt \
         --replace "igraph_scg_grouping3" "" \
@@ -136,7 +136,7 @@ in stdenv.mkDerivation rec {
   cmakeBuildType = "MinSizeRel";
 
   # some plugins depend on other plugins and need to be able to load them
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     find $out/lib/hal_plugins -name '*.so*' | while read -r f ; do
       patchelf --set-rpath "$(patchelf --print-rpath "$f"):$out/lib/hal_plugins" "$f"
     done
diff --git a/pkgs/applications/science/electronics/kicad/base.nix b/pkgs/applications/science/electronics/kicad/base.nix
index 310f9b1c6067..3d39261bc7a5 100644
--- a/pkgs/applications/science/electronics/kicad/base.nix
+++ b/pkgs/applications/science/electronics/kicad/base.nix
@@ -137,7 +137,7 @@ stdenv.mkDerivation rec {
   ]
   # wanted by configuration on linux, doesn't seem to affect performance
   # no effect on closure size
-  ++ optionals (stdenv.isLinux) [
+  ++ optionals (stdenv.hostPlatform.isLinux) [
     util-linux
     libselinux
     libsepol
diff --git a/pkgs/applications/science/electronics/kicad/default.nix b/pkgs/applications/science/electronics/kicad/default.nix
index 4dd8fa743121..a5cceb492522 100644
--- a/pkgs/applications/science/electronics/kicad/default.nix
+++ b/pkgs/applications/science/electronics/kicad/default.nix
@@ -22,7 +22,7 @@
 , pname ? "kicad"
 , stable ? true
 , testing ? false
-, withNgspice ? !stdenv.isDarwin
+, withNgspice ? !stdenv.hostPlatform.isDarwin
 , libngspice
 , withScripting ? true
 , python3
@@ -234,7 +234,7 @@ stdenv.mkDerivation rec {
   # $out and $program_PYTHONPATH don't exist when makeWrapperArgs gets set?
   installPhase =
     let
-      bin = if stdenv.isDarwin then "*.app/Contents/MacOS" else "bin";
+      bin = if stdenv.hostPlatform.isDarwin then "*.app/Contents/MacOS" else "bin";
       tools = [ "kicad" "pcbnew" "eeschema" "gerbview" "pcb_calculator" "pl_editor" "bitmap2component" ];
       utils = [ "dxf2idf" "idf2vrml" "idfcyl" "idfrect" "kicad-cli" ];
     in
@@ -286,7 +286,7 @@ stdenv.mkDerivation rec {
     license = lib.licenses.gpl3Plus;
     maintainers = with lib.maintainers; [ evils ];
     platforms = lib.platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "kicad";
   };
 }
diff --git a/pkgs/applications/science/electronics/nanovna-saver/default.nix b/pkgs/applications/science/electronics/nanovna-saver/default.nix
index d4c3c68991a2..1f483034d2b1 100644
--- a/pkgs/applications/science/electronics/nanovna-saver/default.nix
+++ b/pkgs/applications/science/electronics/nanovna-saver/default.nix
@@ -21,7 +21,7 @@ python3.pkgs.buildPythonApplication rec {
     qt6.qtbase
   ];
 
-  buildInputs = lib.optional stdenv.isLinux qt6.qtwayland;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux qt6.qtwayland;
 
   propagatedBuildInputs = with python3.pkgs; [
     cython
diff --git a/pkgs/applications/science/electronics/openboardview/default.nix b/pkgs/applications/science/electronics/openboardview/default.nix
index 60ee6cef7753..a3a906c25c2b 100644
--- a/pkgs/applications/science/electronics/openboardview/default.nix
+++ b/pkgs/applications/science/electronics/openboardview/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake pkg-config python3 wrapGAppsHook3 ];
-  buildInputs = [ SDL2 fontconfig gtk3 ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ SDL2 fontconfig gtk3 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
@@ -53,10 +53,10 @@ stdenv.mkDerivation rec {
   ];
 
   dontWrapGApps = true;
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p "$out/Applications"
       mv "$out/openboardview.app" "$out/Applications/OpenBoardView.app"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       wrapGApp "$out/bin/${pname}" \
         --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ gtk3 ]}
   '';
diff --git a/pkgs/applications/science/electronics/pulseview/default.nix b/pkgs/applications/science/electronics/pulseview/default.nix
index b6d40a19a14b..3a40b107817d 100644
--- a/pkgs/applications/science/electronics/pulseview/default.nix
+++ b/pkgs/applications/science/electronics/pulseview/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     pkg-config
     qttools
     wrapQtAppsHook
-  ] ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     glib
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     pcre
     python3
     qtsvg
-  ] ++ lib.optionals stdenv.isLinux [ bluez ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ bluez ];
 
   meta = with lib; {
     description = "Qt-based LA/scope/MSO GUI for sigrok (a signal analysis software suite)";
diff --git a/pkgs/applications/science/electronics/sv-lang/default.nix b/pkgs/applications/science/electronics/sv-lang/default.nix
index 58ecf986cf7a..928cf3059385 100644
--- a/pkgs/applications/science/electronics/sv-lang/default.nix
+++ b/pkgs/applications/science/electronics/sv-lang/default.nix
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
 
   # TODO: a mysterious linker error occurs when building the unittests on darwin.
   # The error occurs when using catch2_3 in nixpkgs, not when fetching catch2_3 using CMake
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "SystemVerilog compiler and language services";
diff --git a/pkgs/applications/science/electronics/tkgate/1.x.nix b/pkgs/applications/science/electronics/tkgate/1.x.nix
index f20ce5e0acd0..03883652e637 100644
--- a/pkgs/applications/science/electronics/tkgate/1.x.nix
+++ b/pkgs/applications/science/electronics/tkgate/1.x.nix
@@ -1,8 +1,8 @@
 { lib, stdenv, fetchurl, tcl, tk, libX11, glibc, which, bison, flex, imake, xorgproto, gccmakedep }:
 
 let
-  libiconvInc = lib.optionalString stdenv.isLinux "${glibc.dev}/include";
-  libiconvLib = lib.optionalString stdenv.isLinux "${glibc.out}/lib";
+  libiconvInc = lib.optionalString stdenv.hostPlatform.isLinux "${glibc.dev}/include";
+  libiconvLib = lib.optionalString stdenv.hostPlatform.isLinux "${glibc.out}/lib";
 in
 stdenv.mkDerivation rec {
   pname = "tkgate";
diff --git a/pkgs/applications/science/electronics/verilator/default.nix b/pkgs/applications/science/electronics/verilator/default.nix
index 1bed87615756..b7f2abd37ba7 100644
--- a/pkgs/applications/science/electronics/verilator/default.nix
+++ b/pkgs/applications/science/electronics/verilator/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
     # cmake
   ];
 
-  doCheck = stdenv.isLinux; # darwin tests are broken for now...
+  doCheck = stdenv.hostPlatform.isLinux; # darwin tests are broken for now...
   checkTarget = "test";
 
   preConfigure = "autoconf";
diff --git a/pkgs/applications/science/electronics/xschem/default.nix b/pkgs/applications/science/electronics/xschem/default.nix
index 826181139c19..72f4687f5c85 100644
--- a/pkgs/applications/science/electronics/xschem/default.nix
+++ b/pkgs/applications/science/electronics/xschem/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Schematic capture and netlisting EDA tool";
     longDescription = ''
       Xschem is a schematic capture program, it allows creation of
diff --git a/pkgs/applications/science/electronics/xyce/default.nix b/pkgs/applications/science/electronics/xyce/default.nix
index 85cdafb66057..56fc59c08099 100644
--- a/pkgs/applications/science/electronics/xyce/default.nix
+++ b/pkgs/applications/science/electronics/xyce/default.nix
@@ -173,7 +173,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "High-performance analog circuit simulator";
     longDescription = ''
       Xyce is a SPICE-compatible, high-performance analog circuit simulator,
diff --git a/pkgs/applications/science/logic/alt-ergo/default.nix b/pkgs/applications/science/logic/alt-ergo/default.nix
index 03787a3a084b..73dcd6596008 100644
--- a/pkgs/applications/science/logic/alt-ergo/default.nix
+++ b/pkgs/applications/science/logic/alt-ergo/default.nix
@@ -28,7 +28,7 @@ ocamlPackages.buildDunePackage {
 
   inherit pname version src;
 
-  nativeBuildInputs = [ ocamlPackages.menhir ] ++ lib.optionals stdenv.isDarwin [ darwin.sigtool ];
+  nativeBuildInputs = [ ocamlPackages.menhir ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.sigtool ];
   buildInputs = [ alt-ergo-parsers ] ++ (with ocamlPackages; [ cmdliner dune-site ]);
 
   meta = {
diff --git a/pkgs/applications/science/logic/boolector/default.nix b/pkgs/applications/science/logic/boolector/default.nix
index 1fd6bf7dc543..30e3cf500211 100644
--- a/pkgs/applications/science/logic/boolector/default.nix
+++ b/pkgs/applications/science/logic/boolector/default.nix
@@ -34,11 +34,11 @@ stdenv.mkDerivation rec {
   nativeCheckInputs = [ python3 ];
   doCheck = true;
   preCheck =
-    let var = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+    let var = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     in
       # tests modelgen and modelgensmt2 spawn boolector in another processes and
       # macOS strips DYLD_LIBRARY_PATH, hardcode it for testing
-      lib.optionalString stdenv.isDarwin ''
+      lib.optionalString stdenv.hostPlatform.isDarwin ''
         cp -r bin bin.back
         install_name_tool -change libboolector.dylib $(pwd)/lib/libboolector.dylib bin/boolector
       '' + ''
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
         patchShebangs ..
       '';
 
-  postCheck = lib.optionalString stdenv.isDarwin ''
+  postCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     rm -rf bin
     mv bin.back bin
   '';
diff --git a/pkgs/applications/science/logic/btor2tools/default.nix b/pkgs/applications/science/logic/btor2tools/default.nix
index 5aca699f9d3d..2b547eeb9221 100644
--- a/pkgs/applications/science/logic/btor2tools/default.nix
+++ b/pkgs/applications/science/logic/btor2tools/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0ncl4xwms8d656x95ga8v8zjybx4cmdl5hlcml7dpcgm3p8qj4ks";
   };
 
-  nativeBuildInputs = [ cmake ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = [ cmake ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   installPhase = ''
     mkdir -p $out $dev/include/btor2parser/ $lib/lib
diff --git a/pkgs/applications/science/logic/cbmc/default.nix b/pkgs/applications/science/logic/cbmc/default.nix
index c980e84f9d9f..0bfb51273758 100644
--- a/pkgs/applications/science/logic/cbmc/default.nix
+++ b/pkgs/applications/science/logic/cbmc/default.nix
@@ -83,6 +83,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ jiegec ];
     platforms = platforms.unix;
     # error: no member named 'aligned_alloc' in the global namespace
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/applications/science/logic/cvc4/default.nix b/pkgs/applications/science/logic/cvc4/default.nix
index 2dc12b7ab723..c44b495f2cae 100644
--- a/pkgs/applications/science/logic/cvc4/default.nix
+++ b/pkgs/applications/science/logic/cvc4/default.nix
@@ -15,13 +15,13 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config cmake ];
   buildInputs = [ gmp git python3.pkgs.toml readline swig libantlr3c antlr3_4 boost jdk python3 ]
-    ++ lib.optionals (!stdenv.isDarwin) [ cln ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ cln ];
   configureFlags = [
     "--enable-language-bindings=c,c++,java"
     "--enable-gpl"
     "--with-readline"
     "--with-boost=${boost.dev}"
-  ] ++ lib.optionals (!stdenv.isDarwin) [ "--with-cln" ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ "--with-cln" ];
 
   prePatch = ''
     patch -p1 -i ${./minisat-fenv.patch} -d src/prop/minisat
diff --git a/pkgs/applications/science/logic/elan/default.nix b/pkgs/applications/science/logic/elan/default.nix
index d43ae16a647e..04c5f746f647 100644
--- a/pkgs/applications/science/logic/elan/default.nix
+++ b/pkgs/applications/science/logic/elan/default.nix
@@ -19,11 +19,11 @@ rustPlatform.buildRustPackage rec {
 
   OPENSSL_NO_VENDOR = 1;
   buildInputs = [ curl zlib openssl ]
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   buildFeatures = [ "no-self-update" ];
 
-  patches = lib.optionals stdenv.isLinux [
+  patches = lib.optionals stdenv.hostPlatform.isLinux [
     # Run patchelf on the downloaded binaries.
     # This is necessary because Lean 4 is now dynamically linked.
     (runCommand "0001-dynamically-patchelf-binaries.patch" {
diff --git a/pkgs/applications/science/logic/formula/default.nix b/pkgs/applications/science/logic/formula/default.nix
index 20267e6071c5..bfaf2489bdf7 100644
--- a/pkgs/applications/science/logic/formula/default.nix
+++ b/pkgs/applications/science/logic/formula/default.nix
@@ -14,9 +14,9 @@ buildDotnetModule rec {
   nugetDeps = ./nuget.nix;
   projectFile = "Src/CommandLine/CommandLine.csproj";
 
-  postFixup = if stdenv.isLinux then ''
+  postFixup = if stdenv.hostPlatform.isLinux then ''
     mv $out/bin/CommandLine $out/bin/formula
-  '' else lib.optionalString stdenv.isDarwin ''
+  '' else lib.optionalString stdenv.hostPlatform.isDarwin ''
     makeWrapper ${dotnetCorePackages.runtime_6_0}/bin/dotnet $out/bin/formula \
       --add-flags "$out/lib/formula-dotnet/CommandLine.dll" \
       --prefix DYLD_LIBRARY_PATH : $out/lib/formula-dotnet/runtimes/macos/native
diff --git a/pkgs/applications/science/logic/hol/default.nix b/pkgs/applications/science/logic/hol/default.nix
index f23dce326dd5..883eb4331c9f 100644
--- a/pkgs/applications/science/logic/hol/default.nix
+++ b/pkgs/applications/science/logic/hol/default.nix
@@ -62,7 +62,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Interactive theorem prover based on Higher-Order Logic";
     longDescription = ''
       HOL4 is the latest version of the HOL interactive proof
diff --git a/pkgs/applications/science/logic/key/default.nix b/pkgs/applications/science/logic/key/default.nix
index 0cd5e90cbb50..d97eb42b4027 100644
--- a/pkgs/applications/science/logic/key/default.nix
+++ b/pkgs/applications/science/logic/key/default.nix
@@ -51,7 +51,7 @@ in stdenv.mkDerivation rec {
   __darwinAllowLocalNetworking = true;
 
   # tests are broken on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/applications/science/logic/lean/default.nix b/pkgs/applications/science/logic/lean/default.nix
index f0bd2ba777db..4df1d6eb8aab 100644
--- a/pkgs/applications/science/logic/lean/default.nix
+++ b/pkgs/applications/science/logic/lean/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   postPatch = "patchShebangs .";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace $out/bin/leanpkg \
       --replace "greadlink" "${coreutils}/bin/readlink"
   '';
diff --git a/pkgs/applications/science/logic/lean2/default.nix b/pkgs/applications/science/logic/lean2/default.nix
index e30b8af04735..83cada9e309a 100644
--- a/pkgs/applications/science/logic/lean2/default.nix
+++ b/pkgs/applications/science/logic/lean2/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
     license     = licenses.asl20;
     platforms   = platforms.unix;
     maintainers = with maintainers; [ thoughtpolice gebner ];
-    broken      = stdenv.isAarch64;
+    broken      = stdenv.hostPlatform.isAarch64;
     mainProgram = "lean";
   };
 }
diff --git a/pkgs/applications/science/logic/logisim-evolution/default.nix b/pkgs/applications/science/logic/logisim-evolution/default.nix
index 3d86c8cafdbc..465360a20238 100644
--- a/pkgs/applications/science/logic/logisim-evolution/default.nix
+++ b/pkgs/applications/science/logic/logisim-evolution/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     makeBinaryWrapper
     copyDesktopItems
     unzip
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
diff --git a/pkgs/applications/science/logic/logisim/default.nix b/pkgs/applications/science/logic/logisim/default.nix
index d278f1e78468..951d5b22deef 100644
--- a/pkgs/applications/science/logic/logisim/default.nix
+++ b/pkgs/applications/science/logic/logisim/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
     makeBinaryWrapper
     copyDesktopItems
     unzip
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
diff --git a/pkgs/applications/science/logic/mcrl2/default.nix b/pkgs/applications/science/logic/mcrl2/default.nix
index c26e5f2e761f..a0cbdabc5a45 100644
--- a/pkgs/applications/science/logic/mcrl2/default.nix
+++ b/pkgs/applications/science/logic/mcrl2/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   dontWrapQtApps = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Toolset for model-checking concurrent systems and protocols";
     longDescription = ''
       A formal specification language with an associated toolset,
diff --git a/pkgs/applications/science/logic/nuXmv/default.nix b/pkgs/applications/science/logic/nuXmv/default.nix
index ad40902e9280..5726796bfa18 100644
--- a/pkgs/applications/science/logic/nuXmv/default.nix
+++ b/pkgs/applications/science/logic/nuXmv/default.nix
@@ -5,21 +5,21 @@ stdenv.mkDerivation rec {
   version = "2.0.0";
 
   src = fetchurl {
-    url = "https://es-static.fbk.eu/tools/nuxmv/downloads/nuXmv-${version}-${if stdenv.isDarwin then "macosx64" else "linux64"}.tar.gz";
-    sha256 = if stdenv.isDarwin
+    url = "https://es-static.fbk.eu/tools/nuxmv/downloads/nuXmv-${version}-${if stdenv.hostPlatform.isDarwin then "macosx64" else "linux64"}.tar.gz";
+    sha256 = if stdenv.hostPlatform.isDarwin
              then "sha256-48I+FhJUUam1nMCMMM47CwGO82BYsNz0eHDHXBfqO2E="
              else "sha256-Gf+QgAjTrysZj7qTtt1wcQPganDtO0YtRY4ykhLPzVo=";
   };
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optionals stdenv.isDarwin [ gmp ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ gmp ];
   installPhase= ''
     runHook preInstall
     install -Dm755 -t $out/bin ./bin/nuXmv
     runHook postInstall
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     wrapProgram $out/bin/nuXmv --prefix DYLD_LIBRARY_PATH : ${gmp}/lib
   '';
 
diff --git a/pkgs/applications/science/logic/open-wbo/default.nix b/pkgs/applications/science/logic/open-wbo/default.nix
index 2290ff29224b..798643acc1bb 100644
--- a/pkgs/applications/science/logic/open-wbo/default.nix
+++ b/pkgs/applications/science/logic/open-wbo/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "State-of-the-art MaxSAT and Pseudo-Boolean solver";
     mainProgram = "open-wbo";
     maintainers = with maintainers; [ gebner ];
diff --git a/pkgs/applications/science/logic/opensmt/default.nix b/pkgs/applications/science/logic/opensmt/default.nix
index 1a031e8d1e1d..0ebbbc663caa 100644
--- a/pkgs/applications/science/logic/opensmt/default.nix
+++ b/pkgs/applications/science/logic/opensmt/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Satisfiability modulo theory (SMT) solver";
     mainProgram = "opensmt";
     maintainers = [ maintainers.raskin ];
diff --git a/pkgs/applications/science/logic/picosat/default.nix b/pkgs/applications/science/logic/picosat/default.nix
index 1fef05069a69..23fc2776ba81 100644
--- a/pkgs/applications/science/logic/picosat/default.nix
+++ b/pkgs/applications/science/logic/picosat/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   configurePhase = "./configure.sh --shared --trace";
 
-  makeFlags = lib.optional stdenv.isDarwin
+  makeFlags = lib.optional stdenv.hostPlatform.isDarwin
     "SONAME=-Wl,-install_name,$(out)/lib/libpicosat.so";
 
   installPhase = ''
diff --git a/pkgs/applications/science/logic/satallax/default.nix b/pkgs/applications/science/logic/satallax/default.nix
index bd3e9d3e8351..0f7d05a8823e 100644
--- a/pkgs/applications/science/logic/satallax/default.nix
+++ b/pkgs/applications/science/logic/satallax/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
   '';
 
   # error: invalid suffix on literal; C++11 requires a space between literal and identifier
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-reserved-user-defined-literal";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-reserved-user-defined-literal";
 
   installPhase = ''
     mkdir -p "$out/share/doc/satallax" "$out/bin" "$out/lib" "$out/lib/satallax"
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
     cp -r coq* "$out/lib/satallax/"
   '';
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/applications/science/logic/tamarin-prover/default.nix b/pkgs/applications/science/logic/tamarin-prover/default.nix
index 2aa92118b03a..e621b36a773b 100644
--- a/pkgs/applications/science/logic/tamarin-prover/default.nix
+++ b/pkgs/applications/science/logic/tamarin-prover/default.nix
@@ -108,7 +108,7 @@ mkDerivation (common "tamarin-prover" src // {
   executableToolDepends = [ makeWrapper which maude graphviz ];
   postInstall = ''
     wrapProgram $out/bin/tamarin-prover \
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       --set LOCALE_ARCHIVE "${glibcLocales}/lib/locale/locale-archive" \
   '' + ''
       --prefix PATH : ${lib.makeBinPath [ which maude graphviz ]}
diff --git a/pkgs/applications/science/machine-learning/finalfrontier/default.nix b/pkgs/applications/science/machine-learning/finalfrontier/default.nix
index 9dbbe8455d1b..ca495dcc280a 100644
--- a/pkgs/applications/science/machine-learning/finalfrontier/default.nix
+++ b/pkgs/applications/science/machine-learning/finalfrontier/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Security
   ];
diff --git a/pkgs/applications/science/machine-learning/finalfusion-utils/default.nix b/pkgs/applications/science/machine-learning/finalfusion-utils/default.nix
index b6fa984e7d5b..2b3bd2776089 100644
--- a/pkgs/applications/science/machine-learning/finalfusion-utils/default.nix
+++ b/pkgs/applications/science/machine-learning/finalfusion-utils/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     gfortran.cc.lib
     lapack
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/applications/science/math/R/default.nix b/pkgs/applications/science/math/R/default.nix
index b6fac3cca9e5..f2825e13568a 100644
--- a/pkgs/applications/science/math/R/default.nix
+++ b/pkgs/applications/science/math/R/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
     bzip2 gfortran libX11 libXmu libXt libXt libjpeg libpng libtiff ncurses
     pango pcre2 perl readline (texliveSmall.withPackages (ps: with ps; [ inconsolata helvetic ps.texinfo fancyvrb cm-super rsfs ])) xz zlib less texinfo graphviz icu
     bison imake which blas lapack curl tcl tk jdk tzdata
-  ] ++ lib.optionals stdenv.isDarwin [ Cocoa Foundation libobjc libcxx ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa Foundation libobjc libcxx ];
 
   patches = [
     ./no-usr-local-search-paths.patch
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # Test of the examples for package 'tcltk' fails in Darwin sandbox. See:
   # https://github.com/NixOS/nixpkgs/issues/146131
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure \
       --replace "-install_name libRblas.dylib" "-install_name $out/lib/R/lib/libRblas.dylib" \
       --replace "-install_name libRlapack.dylib" "-install_name $out/lib/R/lib/libRlapack.dylib" \
@@ -77,7 +77,7 @@ stdenv.mkDerivation (finalAttrs: {
       RANLIB=$(type -p ranlib)
       r_cv_have_curl728=yes
       R_SHELL="${stdenv.shell}"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       --disable-R-framework
       --without-x
       OBJC="clang"
diff --git a/pkgs/applications/science/math/caffe/default.nix b/pkgs/applications/science/math/caffe/default.nix
index 2390e9137751..f82cef9d881c 100644
--- a/pkgs/applications/science/math/caffe/default.nix
+++ b/pkgs/applications/science/math/caffe/default.nix
@@ -73,7 +73,7 @@ stdenv.mkDerivation rec {
                 ++ lib.optional ncclSupport nccl
                 ++ lib.optionals leveldbSupport [ leveldb snappy ]
                 ++ lib.optionals pythonSupport [ python numpy ]
-                ++ lib.optionals stdenv.isDarwin [ Accelerate CoreGraphics CoreVideo ]
+                ++ lib.optionals stdenv.hostPlatform.isDarwin [ Accelerate CoreGraphics CoreVideo ]
                 ;
 
   propagatedBuildInputs = lib.optionals pythonSupport (
diff --git a/pkgs/applications/science/math/cemu-ti/default.nix b/pkgs/applications/science/math/cemu-ti/default.nix
index 824476090c24..547b57b312db 100644
--- a/pkgs/applications/science/math/cemu-ti/default.nix
+++ b/pkgs/applications/science/math/cemu-ti/default.nix
@@ -41,6 +41,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ luc65r ];
     platforms = [ "x86_64-linux" "x86_64-darwin" ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/applications/science/math/colpack/default.nix b/pkgs/applications/science/math/colpack/default.nix
index 768366cc5d7a..591ac3281e5e 100644
--- a/pkgs/applications/science/math/colpack/default.nix
+++ b/pkgs/applications/science/math/colpack/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
 
   configureFlags = [
-    "--enable-openmp=${if stdenv.isLinux then "yes" else "no"}"
+    "--enable-openmp=${if stdenv.hostPlatform.isLinux then "yes" else "no"}"
     "--enable-examples=no"
   ];
 
diff --git a/pkgs/applications/science/math/ecm/default.nix b/pkgs/applications/science/math/ecm/default.nix
index 222db0e98e6a..ed1c07d87ec1 100644
--- a/pkgs/applications/science/math/ecm/default.nix
+++ b/pkgs/applications/science/math/ecm/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
   };
 
   # See https://trac.sagemath.org/ticket/19233
-  configureFlags = lib.optional stdenv.isDarwin "--disable-asm-redc";
+  configureFlags = lib.optional stdenv.hostPlatform.isDarwin "--disable-asm-redc";
 
   buildInputs = [ m4 gmp ];
 
diff --git a/pkgs/applications/science/math/geogebra/default.nix b/pkgs/applications/science/math/geogebra/default.nix
index 5fa4862bb9b4..1d5fa4a9ef45 100644
--- a/pkgs/applications/science/math/geogebra/default.nix
+++ b/pkgs/applications/science/math/geogebra/default.nix
@@ -95,6 +95,6 @@ let
     '';
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwinPkg
 else linuxPkg
diff --git a/pkgs/applications/science/math/geogebra/geogebra6.nix b/pkgs/applications/science/math/geogebra/geogebra6.nix
index 40169a72e4a6..d57175daff93 100644
--- a/pkgs/applications/science/math/geogebra/geogebra6.nix
+++ b/pkgs/applications/science/math/geogebra/geogebra6.nix
@@ -97,4 +97,4 @@ let
     };
   };
 in
-if stdenv.isDarwin then darwinPkg else linuxPkg
+if stdenv.hostPlatform.isDarwin then darwinPkg else linuxPkg
diff --git a/pkgs/applications/science/math/giac/default.nix b/pkgs/applications/science/math/giac/default.nix
index 4c0d7235efc7..ce009975c1ba 100644
--- a/pkgs/applications/science/math/giac/default.nix
+++ b/pkgs/applications/science/math/giac/default.nix
@@ -102,7 +102,7 @@ stdenv.mkDerivation rec {
     # when fltk is disabled. disable these tests for now.
     echo > check/chk_fhan2
     echo > check/chk_fhan9
-  '' + lib.optionalString (stdenv.isDarwin) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     # these cover a known regression in giac, likely due to how pari state
     # is shared between multiple giac instances (see pari.cc.old).
     # see https://github.com/NixOS/nixpkgs/pull/264126 for more information
@@ -118,7 +118,7 @@ stdenv.mkDerivation rec {
     "--enable-ao" "--enable-ecm" "--enable-glpk"
   ] ++ lib.optionals enableGUI [
     "--enable-gui" "--with-x"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--disable-nls"
   ] ++ lib.optionals (!enableGUI) [
     "--disable-fltk"
diff --git a/pkgs/applications/science/math/ginac/default.nix b/pkgs/applications/science/math/ginac/default.nix
index d9d12cbf388d..d2713befed38 100644
--- a/pkgs/applications/science/math/ginac/default.nix
+++ b/pkgs/applications/science/math/ginac/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ cln ];
 
   buildInputs = [ readline ]
-    ++ lib.optional stdenv.isDarwin gmp;
+    ++ lib.optional stdenv.hostPlatform.isDarwin gmp;
 
   nativeBuildInputs = [ pkg-config python3 ];
 
diff --git a/pkgs/applications/science/math/gmsh/default.nix b/pkgs/applications/science/math/gmsh/default.nix
index 3e88e7f94bbe..2219815824e7 100644
--- a/pkgs/applications/science/math/gmsh/default.nix
+++ b/pkgs/applications/science/math/gmsh/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     blas lapack gmm fltk libjpeg zlib opencascade-occt
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libGL libGLU xorg.libXrender xorg.libXcursor xorg.libXfixes
     xorg.libXext xorg.libXft xorg.libXinerama xorg.libX11 xorg.libSM
     xorg.libICE
diff --git a/pkgs/applications/science/math/lp_solve/default.nix b/pkgs/applications/science/math/lp_solve/default.nix
index 773f1f3c089e..67d7bfdba90c 100644
--- a/pkgs/applications/science/math/lp_solve/default.nix
+++ b/pkgs/applications/science/math/lp_solve/default.nix
@@ -15,16 +15,16 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-bUq/9cxqqpM66ObBeiJt8PwLZxxDj2lxXUHQn+gfkC8=";
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
     fixDarwinDylibNames
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     autoSignDarwinBinariesHook
   ];
 
   env = {
     NIX_CFLAGS_COMPILE = "-Wno-error=implicit-int";
-  } // lib.optionalAttrs (stdenv.isDarwin && stdenv.isx86_64) {
+  } // lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) {
     NIX_LDFLAGS = "-headerpad_max_install_names";
   };
 
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   buildPhase =
     let
-      ccc = if stdenv.isDarwin then "ccc.osx" else "ccc";
+      ccc = if stdenv.hostPlatform.isDarwin then "ccc.osx" else "ccc";
     in
     ''
       runHook preBuild
diff --git a/pkgs/applications/science/math/palp/default.nix b/pkgs/applications/science/math/palp/default.nix
index a3b54b78f99b..0db35ba89ae6 100644
--- a/pkgs/applications/science/math/palp/default.nix
+++ b/pkgs/applications/science/math/palp/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     "format"
   ];
 
-  patchPhase = lib.optionalString stdenv.isDarwin ''
+  patchPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace GNUmakefile --replace gcc cc
   '';
 
diff --git a/pkgs/applications/science/math/qalculate-gtk/default.nix b/pkgs/applications/science/math/qalculate-gtk/default.nix
index a27d7c1ffdb6..306d6141ac17 100644
--- a/pkgs/applications/science/math/qalculate-gtk/default.nix
+++ b/pkgs/applications/science/math/qalculate-gtk/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation (finalAttrs: {
   hardeningDisable = [ "format" ];
 
   nativeBuildInputs = [ intltool pkg-config autoreconfHook wrapGAppsHook3 ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
   buildInputs = [ libqalculate gtk3 curl ];
   enableParallelBuilding = true;
 
diff --git a/pkgs/applications/science/math/qalculate-qt/default.nix b/pkgs/applications/science/math/qalculate-qt/default.nix
index b1db5ce31a79..2cde63449888 100644
--- a/pkgs/applications/science/math/qalculate-qt/default.nix
+++ b/pkgs/applications/science/math/qalculate-qt/default.nix
@@ -13,14 +13,14 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ qmake intltool pkg-config qttools wrapQtAppsHook ];
   buildInputs = [ libqalculate qtbase qtsvg ]
-    ++ lib.optionals stdenv.isLinux [ qtwayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ qtwayland ];
 
   postPatch = ''
     substituteInPlace qalculate-qt.pro\
       --replace "LRELEASE" "${qttools.dev}/bin/lrelease"
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/qalculate-qt.app $out/Applications
     makeWrapper $out/{Applications/qalculate-qt.app/Contents/MacOS,bin}/qalculate-qt
diff --git a/pkgs/applications/science/math/ratpoints/default.nix b/pkgs/applications/science/math/ratpoints/default.nix
index f2aa1aac2607..4aaed4a1b0ed 100644
--- a/pkgs/applications/science/math/ratpoints/default.nix
+++ b/pkgs/applications/science/math/ratpoints/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ gmp ];
 
   makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
-  buildFlags = lib.optionals stdenv.isDarwin ["CCFLAGS2=-lgmp -lc -lm" "CCFLAGS=-UUSE_SSE"];
+  buildFlags = lib.optionals stdenv.hostPlatform.isDarwin ["CCFLAGS2=-lgmp -lc -lm" "CCFLAGS=-UUSE_SSE"];
   installFlags = [ "INSTALL_DIR=$(out)" ];
 
   preInstall = ''mkdir -p "$out"/{bin,share,lib,include}'';
diff --git a/pkgs/applications/science/math/scalp/default.nix b/pkgs/applications/science/math/scalp/default.nix
index f6ec20faff59..a4d3dc52e0a9 100644
--- a/pkgs/applications/science/math/scalp/default.nix
+++ b/pkgs/applications/science/math/scalp/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     lp_solve
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace "\''$ORIGIN" "\''${CMAKE_INSTALL_PREFIX}/lib"
   '';
diff --git a/pkgs/applications/science/math/scilab-bin/default.nix b/pkgs/applications/science/math/scilab-bin/default.nix
index f6da20531385..e3ca7bef52a4 100644
--- a/pkgs/applications/science/math/scilab-bin/default.nix
+++ b/pkgs/applications/science/math/scilab-bin/default.nix
@@ -100,4 +100,4 @@ let
     '';
   };
 in
-if stdenv.isDarwin then darwin else linux
+if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/applications/science/math/singular/default.nix b/pkgs/applications/science/math/singular/default.nix
index 6ec1c9a2b74e..fff9c7dfaf90 100644
--- a/pkgs/applications/science/math/singular/default.nix
+++ b/pkgs/applications/science/math/singular/default.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
     latex2html
     texinfo
     texliveSmall
-  ] ++ lib.optionals stdenv.isDarwin [ getconf ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ getconf ];
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
   preAutoreconf = ''
@@ -95,7 +95,7 @@ stdenv.mkDerivation rec {
       -i '{}' ';'
   '';
 
-  hardeningDisable = lib.optional stdenv.isi686 "stackprotector";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isi686 "stackprotector";
 
   doCheck = true; # very basic checks, does not test any libraries
 
diff --git a/pkgs/applications/science/math/speedcrunch/default.nix b/pkgs/applications/science/math/speedcrunch/default.nix
index 021c1bedc348..ed7339ab5677 100644
--- a/pkgs/applications/science/math/speedcrunch/default.nix
+++ b/pkgs/applications/science/math/speedcrunch/default.nix
@@ -32,6 +32,6 @@ mkDerivation rec {
     '';
     maintainers = with maintainers; [ gebner j0hax ];
     inherit (qtbase.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/science/misc/gplates/default.nix b/pkgs/applications/science/misc/gplates/default.nix
index ae7681a7a3af..72504246b6c0 100644
--- a/pkgs/applications/science/misc/gplates/default.nix
+++ b/pkgs/applications/science/misc/gplates/default.nix
@@ -80,6 +80,6 @@ in stdenv.mkDerivation (finalAttrs: {
     homepage = "https://www.gplates.org";
     license = licenses.gpl2Only;
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # FIX: this check: https://github.com/GPlates/GPlates/blob/gplates/cmake/modules/Config_h.cmake#L72
+    broken = stdenv.hostPlatform.isDarwin; # FIX: this check: https://github.com/GPlates/GPlates/blob/gplates/cmake/modules/Config_h.cmake#L72
   };
 })
diff --git a/pkgs/applications/science/misc/graphia/default.nix b/pkgs/applications/science/misc/graphia/default.nix
index a5055220e95f..88fc3a8c0e57 100644
--- a/pkgs/applications/science/misc/graphia/default.nix
+++ b/pkgs/applications/science/misc/graphia/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/graphia.x86_64-darwin
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "Visualisation tool for the creation and analysis of graphs";
     homepage = "https://graphia.app";
     license = licenses.gpl3Only;
diff --git a/pkgs/applications/science/misc/openmvg/default.nix b/pkgs/applications/science/misc/openmvg/default.nix
index f622f87d2e41..a535f436ddb1 100644
--- a/pkgs/applications/science/misc/openmvg/default.nix
+++ b/pkgs/applications/science/misc/openmvg/default.nix
@@ -73,7 +73,7 @@ stdenv.mkDerivation rec {
   passthru.updateScript = nix-update-script { };
 
   meta = {
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
     description = "Library for computer-vision scientists and targeted for the Multiple View Geometry community";
     homepage = "https://openmvg.readthedocs.io/en/latest/";
     license = lib.licenses.mpl20;
diff --git a/pkgs/applications/science/misc/openmvs/default.nix b/pkgs/applications/science/misc/openmvs/default.nix
index 57c4367d2a82..689ce1ad554c 100644
--- a/pkgs/applications/science/misc/openmvs/default.nix
+++ b/pkgs/applications/science/misc/openmvs/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   };
 
   # SSE is enabled by default
-  cmakeFlags = lib.optional (!stdenv.isx86_64) "-DOpenMVS_USE_SSE=OFF";
+  cmakeFlags = lib.optional (!stdenv.hostPlatform.isx86_64) "-DOpenMVS_USE_SSE=OFF";
 
   buildInputs = [
     boostWithZstd
diff --git a/pkgs/applications/science/misc/openrefine/default.nix b/pkgs/applications/science/misc/openrefine/default.nix
index 6d169db23b92..60615b6f0926 100644
--- a/pkgs/applications/science/misc/openrefine/default.nix
+++ b/pkgs/applications/science/misc/openrefine/default.nix
@@ -120,7 +120,7 @@ in maven.buildMavenPackage {
       fromSource
       binaryBytecode  # maven dependencies
     ];
-    broken = stdenv.isDarwin;  # builds, doesn't run
+    broken = stdenv.hostPlatform.isDarwin;  # builds, doesn't run
     mainProgram = "refine";
   };
 }
diff --git a/pkgs/applications/science/misc/reason-shell/default.nix b/pkgs/applications/science/misc/reason-shell/default.nix
index 5491593cc7f7..015b5c97ebf3 100644
--- a/pkgs/applications/science/misc/reason-shell/default.nix
+++ b/pkgs/applications/science/misc/reason-shell/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/applications/science/misc/rink/default.nix b/pkgs/applications/science/misc/rink/default.nix
index ae51d55168a9..c0b33b3cbedb 100644
--- a/pkgs/applications/science/misc/rink/default.nix
+++ b/pkgs/applications/science/misc/rink/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config installShellFiles asciidoctor ];
   buildInputs = [ ncurses ]
-    ++ (if stdenv.isDarwin then [ curl libiconv Security ] else [ openssl ]);
+    ++ (if stdenv.hostPlatform.isDarwin then [ curl libiconv Security ] else [ openssl ]);
 
   # Some tests fail and/or attempt to use internet servers.
   doCheck = false;
diff --git a/pkgs/applications/science/misc/root/5.nix b/pkgs/applications/science/misc/root/5.nix
index 80f2df0688da..62f80ee48096 100644
--- a/pkgs/applications/science/misc/root/5.nix
+++ b/pkgs/applications/science/misc/root/5.nix
@@ -35,8 +35,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ pcre python3 zlib libxml2 lz4 xz gsl xxHash libxcrypt ]
-    ++ lib.optionals (!stdenv.isDarwin) [ libX11 libXpm libXft libXext libGLU libGL ]
-    ++ lib.optionals (stdenv.isDarwin) [ Cocoa OpenGL ]
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ libX11 libXpm libXft libXext libGLU libGL ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ Cocoa OpenGL ]
   ;
 
   patches = [
@@ -147,7 +147,7 @@ stdenv.mkDerivation rec {
     "-Dxml=ON"
     "-Dxrootd=OFF"
   ]
-  ++ lib.optional stdenv.isDarwin "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks";
+  ++ lib.optional stdenv.hostPlatform.isDarwin "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks";
 
   setupHook = ./setup-hook.sh;
 
@@ -155,7 +155,7 @@ stdenv.mkDerivation rec {
     homepage = "https://root.cern.ch/";
     description = "Data analysis framework";
     platforms = platforms.unix;
-    broken = !stdenv.isx86_64 || stdenv.cc.isClang or false;
+    broken = !stdenv.hostPlatform.isx86_64 || stdenv.cc.isClang or false;
     maintainers = with maintainers; [ veprbl ];
     license = licenses.lgpl21;
   };
diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index fd998f732818..98fee1747810 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -109,8 +109,8 @@ stdenv.mkDerivation rec {
     tbb
     xrootd
   ]
-  ++ lib.optionals (!stdenv.isDarwin) [ libX11 libXpm libXft libXext libGLU libGL ]
-  ++ lib.optionals (stdenv.isDarwin) [ Cocoa CoreSymbolication OpenGL ]
+  ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ libX11 libXpm libXft libXext libGLU libGL ]
+  ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ Cocoa CoreSymbolication OpenGL ]
   ;
 
   patches = [
@@ -149,11 +149,11 @@ stdenv.mkDerivation rec {
       -e '1iset(nlohmann_json_DIR "${nlohmann_json}/lib/cmake/nlohmann_json/")'
 
     patchShebangs build/unix/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Eliminate impure reference to /System/Library/PrivateFrameworks
     substituteInPlace core/macosx/CMakeLists.txt \
       --replace "-F/System/Library/PrivateFrameworks " ""
-  '' + lib.optionalString (stdenv.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
     MACOSX_DEPLOYMENT_TARGET=10.16
   '';
 
@@ -172,7 +172,7 @@ stdenv.mkDerivation rec {
     "-Dvdt=OFF"
   ]
   ++ lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${lib.getDev stdenv.cc.libc}/include"
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks"
 
     # fatal error: module map file '/nix/store/<hash>-Libsystem-osx-10.12.6/include/module.modulemap' not found
diff --git a/pkgs/applications/science/misc/simgrid/default.nix b/pkgs/applications/science/misc/simgrid/default.nix
index 37c7fb3a2a05..40202b8dbacc 100644
--- a/pkgs/applications/science/misc/simgrid/default.nix
+++ b/pkgs/applications/science/misc/simgrid/default.nix
@@ -115,6 +115,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl2Plus;
     maintainers = with maintainers; [ mickours mpoquet ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/science/misc/tulip/default.nix b/pkgs/applications/science/misc/tulip/default.nix
index 9808a572836d..590b429e73f0 100644
--- a/pkgs/applications/science/misc/tulip/default.nix
+++ b/pkgs/applications/science/misc/tulip/default.nix
@@ -12,15 +12,15 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake wrapQtAppsHook ]
-    ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [ libxml2 freetype glew libjpeg qtbase python3 ]
-    ++ lib.optionals stdenv.isDarwin [ llvmPackages.openmp ]
-    ++ lib.optionals stdenv.isLinux [ libGLU libGL ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages.openmp ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libGLU libGL ];
 
   qtWrapperArgs = [ ''--prefix PATH : ${lib.makeBinPath [ python3 ]}'' ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     # fatal error: 'Python.h' file not found
     "-I${python3}/include/${python3.libPrefix}"
     # error: format string is not a string literal (potentially insecure)
diff --git a/pkgs/applications/science/molecular-dynamics/gromacs/default.nix b/pkgs/applications/science/molecular-dynamics/gromacs/default.nix
index 93cd92863283..1eed4ff7c3d6 100644
--- a/pkgs/applications/science/molecular-dynamics/gromacs/default.nix
+++ b/pkgs/applications/science/molecular-dynamics/gromacs/default.nix
@@ -83,7 +83,7 @@ in stdenv.mkDerivation rec {
     cudaPackages.cuda_cudart
     cudaPackages.libcufft
     cudaPackages.cuda_profiler_api
-  ] ++ lib.optional stdenv.isDarwin llvmPackages.openmp;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   propagatedBuildInputs = lib.optional enableMpi mpi;
   propagatedUserEnvPkgs = lib.optional enableMpi mpi;
diff --git a/pkgs/applications/science/physics/crystfel/default.nix b/pkgs/applications/science/physics/crystfel/default.nix
index e7eb69fb4e1c..b6f8a0d6f13c 100644
--- a/pkgs/applications/science/physics/crystfel/default.nix
+++ b/pkgs/applications/science/physics/crystfel/default.nix
@@ -75,7 +75,7 @@ let
     let
       version = "7.4.0";
       src =
-        if stdenv.isDarwin then
+        if stdenv.hostPlatform.isDarwin then
           fetchurl
             {
               url = "https://www.mrc-lmb.cam.ac.uk/mosflm/mosflm/ver${builtins.replaceStrings [ "." ] [ "" ] version}/pre-built/mosflm-osx-64-noX11.zip";
@@ -86,7 +86,7 @@ let
             url = "https://www.mrc-lmb.cam.ac.uk/mosflm/mosflm/ver${builtins.replaceStrings [ "." ] [ "" ] version}/pre-built/mosflm-linux-64-noX11.zip";
             hash = "sha256:1f2qins5kaz5v6mkaclncqpirx3mlz177ywm13py9p6s9mk99g32";
           };
-      mosflmBinary = if stdenv.isDarwin then "bin/mosflm" else "mosflm-linux-64-noX11";
+      mosflmBinary = if stdenv.hostPlatform.isDarwin then "bin/mosflm" else "mosflm-linux-64-noX11";
     in
     stdenv.mkDerivation {
       pname = "mosflm";
@@ -209,9 +209,9 @@ stdenv.mkDerivation rec {
     xgandalf
     pandoc
   ] ++ lib.optionals withGui [ gtk3 gdk-pixbuf ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     argp-standalone
-  ] ++ lib.optionals (stdenv.isDarwin && !stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isAarch64) [
     memorymappingHook
   ]
   ++ lib.optionals withBitshuffle [ hdf5-external-filter-plugins ];
diff --git a/pkgs/applications/science/physics/fasthenry/default.nix b/pkgs/applications/science/physics/fasthenry/default.nix
index 6b9a73f6dd17..963828e18edc 100644
--- a/pkgs/applications/science/physics/fasthenry/default.nix
+++ b/pkgs/applications/science/physics/fasthenry/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
       SHELL="sh"
       "all"
     )
-    '' + (if stdenv.isx86_64 then ''
+    '' + (if stdenv.hostPlatform.isx86_64 then ''
     makeFlagsArray+=(
       CFLAGS="-fcommon -O -DFOUR -m64"
     );
diff --git a/pkgs/applications/science/physics/professor/default.nix b/pkgs/applications/science/physics/professor/default.nix
index 1c6c21c52fef..60a030f52821 100644
--- a/pkgs/applications/science/physics/professor/default.nix
+++ b/pkgs/applications/science/physics/professor/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   postPatch = ''
     substituteInPlace Makefile \
       --replace-fail 'pip install ' 'pip install --prefix $(out) '
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace-fail '-shared -o' '-shared -install_name "$(out)/$@" -o'
   '';
diff --git a/pkgs/applications/science/physics/sacrifice/default.nix b/pkgs/applications/science/physics/sacrifice/default.nix
index dbe236537139..b6b53446473f 100644
--- a/pkgs/applications/science/physics/sacrifice/default.nix
+++ b/pkgs/applications/science/physics/sacrifice/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
   preConfigure = ''
     substituteInPlace configure --replace HAVE_LCG=yes HAVE_LCG=no
   ''
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace LIB_SUFFIX=\"so\" LIB_SUFFIX=\"dylib\"
   '';
 
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
     "--with-pythia=${pythia}"
   ];
 
-  postInstall = if stdenv.isDarwin then ''
+  postInstall = if stdenv.hostPlatform.isDarwin then ''
     install_name_tool -add_rpath ${pythia}/lib "$out"/bin/run-pythia
   '' else ''
     wrapProgram $out/bin/run-pythia \
@@ -46,6 +46,6 @@ stdenv.mkDerivation {
     platforms   = lib.platforms.unix;
     maintainers = with lib.maintainers; [ veprbl ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/science/physics/sherpa/default.nix b/pkgs/applications/science/physics/sherpa/default.nix
index 21a5ee7ec234..2dfe3f7d7bb2 100644
--- a/pkgs/applications/science/physics/sherpa/default.nix
+++ b/pkgs/applications/science/physics/sherpa/default.nix
@@ -35,6 +35,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/science/physics/xfitter/default.nix b/pkgs/applications/science/physics/xfitter/default.nix
index 8a92c85a1383..e509f3a005f7 100644
--- a/pkgs/applications/science/physics/xfitter/default.nix
+++ b/pkgs/applications/science/physics/xfitter/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   # workaround wrong library IDs
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -sv "$out/lib/xfitter/"* "$out/lib/"
   '';
 
diff --git a/pkgs/applications/science/physics/xnec2c/default.nix b/pkgs/applications/science/physics/xnec2c/default.nix
index ffdd4b6d0b07..aaff1ff40d31 100644
--- a/pkgs/applications/science/physics/xnec2c/default.nix
+++ b/pkgs/applications/science/physics/xnec2c/default.nix
@@ -38,6 +38,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
 
     # Darwin support likely to be fixed upstream in the next release
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/science/robotics/mavproxy/default.nix b/pkgs/applications/science/robotics/mavproxy/default.nix
index f86ca5f635e4..e36b3d62b696 100644
--- a/pkgs/applications/science/robotics/mavproxy/default.nix
+++ b/pkgs/applications/science/robotics/mavproxy/default.nix
@@ -25,7 +25,7 @@ buildPythonApplication rec {
     pyserial
     setuptools
     wxpython
-  ] ++ lib.optionals stdenv.isDarwin [ billiard gnureadline ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ billiard gnureadline ];
 
   # No tests
   doCheck = false;
diff --git a/pkgs/applications/search/recoll/default.nix b/pkgs/applications/search/recoll/default.nix
index 5de1166e116d..21618f8ed3ec 100644
--- a/pkgs/applications/search/recoll/default.nix
+++ b/pkgs/applications/search/recoll/default.nix
@@ -68,7 +68,7 @@ let filters = {
       perl = perl.passthru.withPackages (p: [ p.ImageExifTool ]);
     };
     filterPath = lib.makeBinPath (map lib.getBin (builtins.attrValues filters));
-    useInotify = if stdenv.isLinux then "true" else "false";
+    useInotify = if stdenv.hostPlatform.isLinux then "true" else "false";
 in
 
 mkDerivation rec {
@@ -138,7 +138,7 @@ mkDerivation rec {
     file
   ] ++ lib.optionals withGui [
     qtbase
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
@@ -167,15 +167,15 @@ mkDerivation rec {
       --prefix PYTHONPATH : $out/${python3Packages.python.sitePackages}
     wrapProgram $out/share/recoll/filters/rclimg \
       --prefix PERL5LIB : "${with perlPackages; makeFullPerlPath [ ImageExifTool ]}"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace  $f --replace '"lyx"' '"${lib.getBin lyx}/bin/lyx"'
-  '' + lib.optionalString (stdenv.isDarwin && withGui) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && withGui) ''
     mkdir $out/Applications
     mv $out/bin/recoll.app $out/Applications
   '';
 
   # create symlink after fixup to prevent double wrapping of recoll
-  postFixup = lib.optionalString (stdenv.isDarwin && withGui) ''
+  postFixup = lib.optionalString (stdenv.hostPlatform.isDarwin && withGui) ''
     ln -s ../Applications/recoll.app/Contents/MacOS/recoll $out/bin/recoll
   '';
 
diff --git a/pkgs/applications/system/glances/default.nix b/pkgs/applications/system/glances/default.nix
index 6d8899440d4a..ff8b4c310662 100644
--- a/pkgs/applications/system/glances/default.nix
+++ b/pkgs/applications/system/glances/default.nix
@@ -40,14 +40,14 @@ buildPythonApplication rec {
   # CoreFoundation. This issues was solved for binaries but for interpreted
   # scripts a workaround below is still required.
   # Relevant: https://github.com/NixOS/nixpkgs/issues/24693
-  makeWrapperArgs = lib.optionals stdenv.isDarwin [
+  makeWrapperArgs = lib.optionals stdenv.hostPlatform.isDarwin [
     "--set"
     "DYLD_FRAMEWORK_PATH"
     "/System/Library/Frameworks"
   ];
 
   doCheck = true;
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_FRAMEWORK_PATH=/System/Library/Frameworks
   '';
 
@@ -68,7 +68,7 @@ buildPythonApplication rec {
     jinja2
     orjson
     prometheus-client
-  ] ++ lib.optional stdenv.isLinux hddtemp;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux hddtemp;
 
   meta = {
     homepage = "https://nicolargo.github.io/glances/";
diff --git a/pkgs/applications/terminal-emulators/alacritty/default.nix b/pkgs/applications/terminal-emulators/alacritty/default.nix
index 58e527cc50a9..33691aaef491 100644
--- a/pkgs/applications/terminal-emulators/alacritty/default.nix
+++ b/pkgs/applications/terminal-emulators/alacritty/default.nix
@@ -35,7 +35,7 @@ let
     expat
     fontconfig
     freetype
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libGL
     xorg.libX11
     xorg.libXcursor
@@ -71,7 +71,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = rpathLibs
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreGraphics
     CoreServices
@@ -83,7 +83,7 @@ rustPlatform.buildRustPackage rec {
 
   outputs = [ "out" "terminfo" ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace alacritty/src/config/ui_config.rs \
       --replace xdg-open ${xdg-utils}/bin/xdg-open
   '';
@@ -91,7 +91,7 @@ rustPlatform.buildRustPackage rec {
   checkFlags = [ "--skip=term::test::mock_term" ]; # broken on aarch64
 
   postInstall = (
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       mkdir $out/Applications
       cp -r extra/osx/Alacritty.app $out/Applications
       ln -s $out/bin $out/Applications/Alacritty.app/Contents/MacOS
diff --git a/pkgs/applications/terminal-emulators/contour/default.nix b/pkgs/applications/terminal-emulators/contour/default.nix
index a255b2fb99db..f01c47afdd36 100644
--- a/pkgs/applications/terminal-emulators/contour/default.nix
+++ b/pkgs/applications/terminal-emulators/contour/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation (final: {
     file
     wrapQtAppsHook
     installShellFiles
-  ] ++ lib.optionals stdenv.isDarwin [ sigtool ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ sigtool ];
 
   buildInputs = [
     boxed-cpp
@@ -67,21 +67,21 @@ stdenv.mkDerivation (final: {
     range-v3
     yaml-cpp
   ]
-  ++ lib.optionals stdenv.isLinux [ libutempter ]
-  ++ lib.optionals stdenv.isDarwin [ utmp ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ libutempter ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ utmp ];
 
   cmakeFlags = [ "-DCONTOUR_QT_VERSION=6" ];
 
   postInstall = ''
     mkdir -p $out/nix-support $terminfo/share
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications
     installShellCompletion --zsh $out/contour.app/Contents/Resources/shell-integration/shell-integration.zsh
     installShellCompletion --fish $out/contour.app/Contents/Resources/shell-integration/shell-integration.fish
     cp -r $out/contour.app/Contents/Resources/terminfo $terminfo/share
     mv $out/contour.app $out/Applications
     ln -s $out/bin $out/Applications/contour.app/Contents/MacOS
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     mv $out/share/terminfo $terminfo/share/
     installShellCompletion --zsh $out/share/contour/shell-integration/shell-integration.zsh
     installShellCompletion --fish $out/share/contour/shell-integration/shell-integration.fish
diff --git a/pkgs/applications/terminal-emulators/cool-retro-term/default.nix b/pkgs/applications/terminal-emulators/cool-retro-term/default.nix
index 8a33d222855e..c2a871085831 100644
--- a/pkgs/applications/terminal-emulators/cool-retro-term/default.nix
+++ b/pkgs/applications/terminal-emulators/cool-retro-term/default.nix
@@ -40,7 +40,7 @@ mkDerivation rec {
     mv $out/usr/share $out/share
     mv $out/usr/bin $out/bin
     rmdir $out/usr
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/bin/cool-retro-term.app/Contents/MacOS/cool-retro-term $out/bin/cool-retro-term
   '';
 
diff --git a/pkgs/applications/terminal-emulators/kitty/default.nix b/pkgs/applications/terminal-emulators/kitty/default.nix
index 162d3cd583fd..cf5614d399a5 100644
--- a/pkgs/applications/terminal-emulators/kitty/default.nix
+++ b/pkgs/applications/terminal-emulators/kitty/default.nix
@@ -57,7 +57,7 @@ buildPythonApplication rec {
     librsync
     openssl.dev
     xxHash
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
     Kernel
     UniformTypeIdentifiers
@@ -65,9 +65,9 @@ buildPythonApplication rec {
     libpng
     python3
     zlib
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     Libsystem
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     fontconfig libunistring libcanberra libX11
     libXrandr libXinerama libXcursor libxkbcommon libXi libXext
     wayland-protocols wayland dbus libGL
@@ -84,10 +84,10 @@ buildPythonApplication rec {
     sphinx-inline-tabs
     go
     fontconfig
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     imagemagick
     libicns  # For the png2icns tool.
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wayland-scanner
   ];
 
@@ -141,8 +141,8 @@ buildPythonApplication rec {
     mkdir ./fonts/
     cp "${(nerdfonts.override {fonts = ["NerdFontsSymbolsOnly"];})}/share/fonts/truetype/NerdFonts/SymbolsNerdFontMono-Regular.ttf" ./fonts/
 
-    ${ lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) "export MACOSX_DEPLOYMENT_TARGET=11" }
-    ${if stdenv.isDarwin then ''
+    ${ lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "export MACOSX_DEPLOYMENT_TARGET=11" }
+    ${if stdenv.hostPlatform.isDarwin then ''
       ${python.pythonOnBuildForHost.interpreter} setup.py build ${darwinOptions}
       make docs
       ${python.pythonOnBuildForHost.interpreter} setup.py kitty.app ${darwinOptions}
@@ -165,13 +165,13 @@ buildPythonApplication rec {
     bashInteractive
     zsh
     fish
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     # integration tests need sudo
     sudo
   ];
 
   # skip failing tests due to darwin sandbox
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace kitty_tests/file_transmission.py \
       --replace test_file_get dont_test_file_get \
       --replace test_path_mapping_receive dont_test_path_mapping_receive \
@@ -209,7 +209,7 @@ buildPythonApplication rec {
     runHook preInstall
     mkdir -p "$out"
     mkdir -p "$kitten/bin"
-    ${if stdenv.isDarwin then ''
+    ${if stdenv.hostPlatform.isDarwin then ''
     mkdir "$out/bin"
     ln -s ../Applications/kitty.app/Contents/MacOS/kitty "$out/bin/kitty"
     ln -s ../Applications/kitty.app/Contents/MacOS/kitten "$out/bin/kitten"
@@ -232,7 +232,7 @@ buildPythonApplication rec {
       --fish <("$out/bin/kitty" +complete setup fish2) \
       --zsh  <("$out/bin/kitty" +complete setup zsh)
 
-    terminfo_src=${if stdenv.isDarwin then
+    terminfo_src=${if stdenv.hostPlatform.isDarwin then
       ''"$out/Applications/kitty.app/Contents/Resources/terminfo"''
       else
       "$out/share/terminfo"}
@@ -249,7 +249,7 @@ buildPythonApplication rec {
   '';
 
   passthru = {
-    tests = lib.optionalAttrs stdenv.isLinux {
+    tests = lib.optionalAttrs stdenv.hostPlatform.isLinux {
       default = nixosTests.terminal-emulators.kitty;
     };
     updateScript = nix-update-script {};
diff --git a/pkgs/applications/terminal-emulators/mlterm/default.nix b/pkgs/applications/terminal-emulators/mlterm/default.nix
index 28f027401bd7..dcf581f27a80 100644
--- a/pkgs/applications/terminal-emulators/mlterm/default.nix
+++ b/pkgs/applications/terminal-emulators/mlterm/default.nix
@@ -27,8 +27,8 @@
   # documentd in `./configure --help`, and it is reported here:
   # https://github.com/arakiken/mlterm/issues/73
   fb = false;
-  quartz = stdenv.isDarwin;
-  wayland = stdenv.isLinux;
+  quartz = stdenv.hostPlatform.isDarwin;
+  wayland = stdenv.hostPlatform.isLinux;
   sdl2 = true;
 }
 , libxkbcommon
@@ -59,16 +59,16 @@
   mlfc = true;
 }
 # Whether to enable the X window system
-, enableX11 ? stdenv.isLinux
+, enableX11 ? stdenv.hostPlatform.isLinux
 # Most of the input methods and other build features are enabled by default,
 # the following attribute set can be used to disable some of them. It's parsed
 # when we set `configureFlags`. If you find other configure Flags that require
 # dependencies, it'd be nice to make that contribution here.
 , enableFeatures ? {
-  uim = !stdenv.isDarwin;
-  ibus = !stdenv.isDarwin;
-  fcitx = !stdenv.isDarwin;
-  m17n = !stdenv.isDarwin;
+  uim = !stdenv.hostPlatform.isDarwin;
+  ibus = !stdenv.hostPlatform.isDarwin;
+  fcitx = !stdenv.hostPlatform.isDarwin;
+  m17n = !stdenv.hostPlatform.isDarwin;
   ssh2 = true;
   bidi = true;
   # Open Type layout support, (substituting glyphs with opentype fonts)
@@ -185,7 +185,7 @@ in stdenv.mkDerivation (finalAttrs: {
     install -D contrib/icon/mlterm-icon.svg "$out/share/icons/hicolor/scalable/apps/mlterm.svg"
     install -D contrib/icon/mlterm-icon-gnome2.png "$out/share/icons/hicolor/48x48/apps/mlterm.png"
     install -D -t $out/share/applications $desktopItem/share/applications/*
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications/
     cp -a cocoa/mlterm.app $out/Applications/
     install $out/bin/mlterm -Dt $out/Applications/mlterm.app/Contents/MacOS/
diff --git a/pkgs/applications/terminal-emulators/rio/default.nix b/pkgs/applications/terminal-emulators/rio/default.nix
index 00c1e9aa1ffb..136bbcd49436 100644
--- a/pkgs/applications/terminal-emulators/rio/default.nix
+++ b/pkgs/applications/terminal-emulators/rio/default.nix
@@ -17,21 +17,21 @@
 , vulkan-loader
 , libxkbcommon
 
-, withX11 ? !stdenv.isDarwin
+, withX11 ? !stdenv.hostPlatform.isDarwin
 , libX11
 , libXcursor
 , libXi
 , libXrandr
 , libxcb
 
-, withWayland ? !stdenv.isDarwin
+, withWayland ? !stdenv.hostPlatform.isDarwin
 , wayland
 
 , testers
 , rio
 }:
 let
-  rlinkLibs = if stdenv.isDarwin then [
+  rlinkLibs = if stdenv.hostPlatform.isDarwin then [
     darwin.libobjc
     darwin.apple_sdk_11_0.frameworks.AppKit
     darwin.apple_sdk_11_0.frameworks.AVFoundation
@@ -68,7 +68,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     ncurses
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     cmake
     pkg-config
     autoPatchelfHook
@@ -99,7 +99,7 @@ rustPlatform.buildRustPackage rec {
     tic -xe rio,rio-direct -o "$terminfo/share/terminfo" misc/rio.terminfo
     mkdir -p $out/nix-support
     echo "$terminfo" >> $out/nix-support/propagated-user-env-packages
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications/
     mv misc/osx/Rio.app/ $out/Applications/
     mkdir $out/Applications/Rio.app/Contents/MacOS/
@@ -130,6 +130,6 @@ rustPlatform.buildRustPackage rec {
     # stderr:
     # thread 'main' panicked at corcovado/src/sys/unix/eventedfd.rs:24:16:
     # called `Result::unwrap()` on an `Err` value: Os { code: 1, kind: PermissionDenied, message: "Operation not permitted" }
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/terminal-emulators/rxvt-unicode/default.nix b/pkgs/applications/terminal-emulators/rxvt-unicode/default.nix
index f28694db2949..a39099cc4bd4 100644
--- a/pkgs/applications/terminal-emulators/rxvt-unicode/default.nix
+++ b/pkgs/applications/terminal-emulators/rxvt-unicode/default.nix
@@ -76,7 +76,7 @@ stdenv.mkDerivation {
     url = "https://github.com/exg/rxvt-unicode/commit/16634bc8dd5fc4af62faf899687dfa8f27768d15.patch";
     excludes = [ "Changes" ];
     sha256 = "sha256-JVqzYi3tcWIN2j5JByZSztImKqbbbB3lnfAwUXrumHM=";
-  }) ++ lib.optional stdenv.isDarwin ./patches/makefile-phony.patch;
+  }) ++ lib.optional stdenv.hostPlatform.isDarwin ./patches/makefile-phony.patch;
 
   configureFlags = [
     "--with-terminfo=${placeholder "terminfo"}/share/terminfo"
diff --git a/pkgs/applications/terminal-emulators/st/default.nix b/pkgs/applications/terminal-emulators/st/default.nix
index 72a6835ff4aa..676ef292def1 100644
--- a/pkgs/applications/terminal-emulators/st/default.nix
+++ b/pkgs/applications/terminal-emulators/st/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
     (writeText "config.def.h" conf);
 
   postPatch = lib.optionalString (conf != null) "cp ${finalAttrs.configFile} config.def.h"
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace config.mk --replace "-lrt" ""
   '';
 
diff --git a/pkgs/applications/terminal-emulators/syncterm/default.nix b/pkgs/applications/terminal-emulators/syncterm/default.nix
index 36a02e08bbd5..60b172184fc9 100644
--- a/pkgs/applications/terminal-emulators/syncterm/default.nix
+++ b/pkgs/applications/terminal-emulators/syncterm/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
     "-Wno-unused-result"
     "-Wformat-overflow=0"
-  ] ++ (lib.optionals stdenv.isLinux [
+  ] ++ (lib.optionals stdenv.hostPlatform.isLinux [
     "-DUSE_ALSA_SOUND" # Don't use OSS for beeps.
   ]);
   makeFlags = [
@@ -38,12 +38,12 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoPatchelfHook pkg-config SDL2 perl unzip ]; # SDL2 for `sdl2-config`.
   buildInputs = [ ncurses SDL2 ]
-    ++ (lib.optional stdenv.isLinux alsa-lib);
+    ++ (lib.optional stdenv.hostPlatform.isLinux alsa-lib);
   runtimeDependencies = [ ncurses SDL2 ]; # Both of these are dlopen()'ed at runtime.
 
   meta = with lib; {
     # error: unsupported option '-fsanitize=safe-stack' for target 'x86_64-apple-darwin'
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     homepage = "https://syncterm.bbsdev.net/";
     description = "BBS terminal emulator";
     mainProgram = "syncterm";
diff --git a/pkgs/applications/terminal-emulators/termite/default.nix b/pkgs/applications/terminal-emulators/termite/default.nix
index 4acc8263ce86..3dc6d484d2d3 100644
--- a/pkgs/applications/terminal-emulators/termite/default.nix
+++ b/pkgs/applications/terminal-emulators/termite/default.nix
@@ -47,7 +47,7 @@ in stdenv.mkDerivation rec {
       url = "https://github.com/thestinger/termite/commit/7e9a93b421b9596f8980645a46ac2ad5468dac06.patch";
       sha256 = "0vph2m5919f7w1xnc8i6z0j44clsm1chxkfg7l71nahxyfw5yh4j";
     })
-  ] ++ lib.optional stdenv.isDarwin ./remove_ldflags_macos.patch;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin ./remove_ldflags_macos.patch;
 
   makeFlags = [ "VERSION=v${version}" "PREFIX=" "DESTDIR=$(out)" ];
 
diff --git a/pkgs/applications/terminal-emulators/wezterm/default.nix b/pkgs/applications/terminal-emulators/wezterm/default.nix
index 4f710d61c20a..68391fc4dc7f 100644
--- a/pkgs/applications/terminal-emulators/wezterm/default.nix
+++ b/pkgs/applications/terminal-emulators/wezterm/default.nix
@@ -63,12 +63,12 @@ rustPlatform.buildRustPackage rec {
     ncurses # tic for terminfo
     pkg-config
     python3
-  ] ++ lib.optional stdenv.isDarwin perl;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin perl;
 
   buildInputs = [
     fontconfig
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
     libxcb
     libxkbcommon
@@ -78,7 +78,7 @@ rustPlatform.buildRustPackage rec {
     xcbutilimage
     xcbutilkeysyms
     xcbutilwm # contains xcb-ewmh among others
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
     CoreGraphics
     Foundation
@@ -89,7 +89,7 @@ rustPlatform.buildRustPackage rec {
 
   buildFeatures = [ "distro-defaults" ];
 
-  env.NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework System";
+  env.NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework System";
 
   postInstall = ''
     mkdir -p $out/nix-support
@@ -108,12 +108,12 @@ rustPlatform.buildRustPackage rec {
     install -Dm644 assets/wezterm-nautilus.py -t $out/share/nautilus-python/extensions
   '';
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf \
       --add-needed "${libGL}/lib/libEGL.so.1" \
       --add-needed "${vulkan-loader}/lib/libvulkan.so.1" \
       $out/bin/wezterm-gui
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p "$out/Applications"
     OUT_APP="$out/Applications/WezTerm.app"
     cp -r assets/macos/WezTerm.app "$OUT_APP"
diff --git a/pkgs/applications/terminal-emulators/x3270/default.nix b/pkgs/applications/terminal-emulators/x3270/default.nix
index 2e901e5af876..45b08bd10f66 100644
--- a/pkgs/applications/terminal-emulators/x3270/default.nix
+++ b/pkgs/applications/terminal-emulators/x3270/default.nix
@@ -36,9 +36,9 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-gcC6REfZentIPEDhGznUSYu8mvVfpPeMz/Bks+N43Fk=";
   };
 
-  buildFlags = lib.optional stdenv.isLinux "unix";
+  buildFlags = lib.optional stdenv.hostPlatform.isLinux "unix";
 
-  configureFlags = lib.optionals stdenv.isDarwin [
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--enable-c3270"
     "--enable-pr3270"
     "--enable-s3270"
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
     expat
     openssl
     readline
-  ] ++ lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   meta = with lib; {
     description = "IBM 3270 terminal emulator for the X Window System";
diff --git a/pkgs/applications/version-management/bcompare/default.nix b/pkgs/applications/version-management/bcompare/default.nix
index 33b4cb0f90b5..5a60f9a1d546 100644
--- a/pkgs/applications/version-management/bcompare/default.nix
+++ b/pkgs/applications/version-management/bcompare/default.nix
@@ -93,6 +93,6 @@ let
     mainProgram = "bcompare";
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/applications/version-management/blackbox/default.nix b/pkgs/applications/version-management/blackbox/default.nix
index c98ff367c668..e5be040f6a25 100644
--- a/pkgs/applications/version-management/blackbox/default.nix
+++ b/pkgs/applications/version-management/blackbox/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ gnupg ];
 
   # https://github.com/NixOS/nixpkgs/issues/134445
-  doCheck = !stdenv.isDarwin && stdenv.isx86_64;
+  doCheck = !stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
 
   nativeCheckInputs = [
     expect
diff --git a/pkgs/applications/version-management/cvs/default.nix b/pkgs/applications/version-management/cvs/default.nix
index 20a38f9f8e8c..7ec801503f76 100644
--- a/pkgs/applications/version-management/cvs/default.nix
+++ b/pkgs/applications/version-management/cvs/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     "AR=${stdenv.cc.targetPrefix}ar"
   ];
 
-  env = lib.optionalAttrs (stdenv.isDarwin && stdenv.cc.isClang) {
+  env = lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.cc.isClang) {
     NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration";
   };
 
diff --git a/pkgs/applications/version-management/delta/default.nix b/pkgs/applications/version-management/delta/default.nix
index d724d4f2bf46..76ace5026e68 100644
--- a/pkgs/applications/version-management/delta/default.nix
+++ b/pkgs/applications/version-management/delta/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     oniguruma
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Foundation
   ];
 
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
   # https://github.com/dandavison/delta/issues/1660
   dontUseCargoParallelTests = true;
 
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     # This test tries to read /etc/passwd, which fails with the sandbox
     # enabled on Darwin
     "--skip=test_diff_real_files"
diff --git a/pkgs/applications/version-management/fnc/default.nix b/pkgs/applications/version-management/fnc/default.nix
index b52314180816..ec5ade218f10 100644
--- a/pkgs/applications/version-management/fnc/default.nix
+++ b/pkgs/applications/version-management/fnc/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
   env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.cc.isGNU [
     # Needed with GCC 12
     "-Wno-error=maybe-uninitialized"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # error: 'strtonum' is only available on macOS 11.0 or newer
     "-Wno-error=unguarded-availability-new"
   ]);
diff --git a/pkgs/applications/version-management/fossil/default.nix b/pkgs/applications/version-management/fossil/default.nix
index b1b828d47959..9443c1e9cdea 100644
--- a/pkgs/applications/version-management/fossil/default.nix
+++ b/pkgs/applications/version-management/fossil/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ installShellFiles tcl tcllib ];
 
   buildInputs = [ zlib openssl readline which ed ]
-    ++ lib.optional stdenv.isDarwin libiconv
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv
     ++ lib.optional (!withInternalSqlite) sqlite;
 
   enableParallelBuilding = true;
diff --git a/pkgs/applications/version-management/gfold/default.nix b/pkgs/applications/version-management/gfold/default.nix
index fb8cccdda1bd..299ea9fb6ba4 100644
--- a/pkgs/applications/version-management/gfold/default.nix
+++ b/pkgs/applications/version-management/gfold/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-idzw5dfCCvujvYr7DG0oOzQUIcbACtiIZLoA4MEClzY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Security
   ];
diff --git a/pkgs/applications/version-management/git-absorb/default.nix b/pkgs/applications/version-management/git-absorb/default.nix
index 49d4a0a67ad2..8679f2842f9d 100644
--- a/pkgs/applications/version-management/git-absorb/default.nix
+++ b/pkgs/applications/version-management/git-absorb/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoHash = "sha256-Y/0In33y4mVTaE9yoBZ/3tRWcsSKgGjTCSHdjScNEj0=";
 
diff --git a/pkgs/applications/version-management/git-branchless/default.nix b/pkgs/applications/version-management/git-branchless/default.nix
index d3d4efd2478b..0e83d17d33a7 100644
--- a/pkgs/applications/version-management/git-branchless/default.nix
+++ b/pkgs/applications/version-management/git-branchless/default.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
       openssl
       sqlite
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Security
       SystemConfiguration
       libiconv
diff --git a/pkgs/applications/version-management/git-cinnabar/default.nix b/pkgs/applications/version-management/git-cinnabar/default.nix
index 2d97b41cdd04..84a34601d40f 100644
--- a/pkgs/applications/version-management/git-cinnabar/default.nix
+++ b/pkgs/applications/version-management/git-cinnabar/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
     curl
     zlib
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     CoreServices
   ];
diff --git a/pkgs/applications/version-management/git-cliff/default.nix b/pkgs/applications/version-management/git-cliff/default.nix
index 92660f32267e..25bcf4f1ca7c 100644
--- a/pkgs/applications/version-management/git-cliff/default.nix
+++ b/pkgs/applications/version-management/git-cliff/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   # attempts to run the program on .git in src which is not deterministic
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security SystemConfiguration
   ];
 
diff --git a/pkgs/applications/version-management/git-cola/default.nix b/pkgs/applications/version-management/git-cola/default.nix
index c1c909e8827f..fac196e9ad0c 100644
--- a/pkgs/applications/version-management/git-cola/default.nix
+++ b/pkgs/applications/version-management/git-cola/default.nix
@@ -20,7 +20,7 @@ python3Packages.buildPythonApplication rec {
     hash = "sha256-8OErZ6uKTWE245BoBu9lQyTLA43DfWaYDv3wbPWaufg=";
   };
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     qt5.qtwayland
   ];
 
@@ -47,7 +47,7 @@ python3Packages.buildPythonApplication rec {
   disabledTestPaths = [
     "qtpy/"
     "contrib/win32"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "cola/inotify.py"
   ];
 
diff --git a/pkgs/applications/version-management/git-credential-keepassxc/default.nix b/pkgs/applications/version-management/git-credential-keepassxc/default.nix
index 5f4f7c6daf71..3a85cff455b8 100644
--- a/pkgs/applications/version-management/git-credential-keepassxc/default.nix
+++ b/pkgs/applications/version-management/git-credential-keepassxc/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-jBUp0jes4wtr8cmqceEBb6noqGkJUHbIfYgWOw5KMF4=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ DiskArbitration Foundation ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ DiskArbitration Foundation ];
 
   buildFeatures = []
     ++ lib.optional withNotification "notification"
diff --git a/pkgs/applications/version-management/git-dive/default.nix b/pkgs/applications/version-management/git-dive/default.nix
index c0209c38cfa9..b80397e142bf 100644
--- a/pkgs/applications/version-management/git-dive/default.nix
+++ b/pkgs/applications/version-management/git-dive/default.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     oniguruma
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/version-management/git-gone/default.nix b/pkgs/applications/version-management/git-gone/default.nix
index 51822966e6e6..1cc039a09fc6 100644
--- a/pkgs/applications/version-management/git-gone/default.nix
+++ b/pkgs/applications/version-management/git-gone/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     installManPage git-gone.1
diff --git a/pkgs/applications/version-management/git-graph/default.nix b/pkgs/applications/version-management/git-graph/default.nix
index 016892892247..e801cb0e23bf 100644
--- a/pkgs/applications/version-management/git-graph/default.nix
+++ b/pkgs/applications/version-management/git-graph/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
     description = "Command line tool to show clear git graphs arranged for your branching model";
     homepage = "https://github.com/mlange-42/git-graph";
     license = licenses.mit;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ cafkafk ];
     mainProgram = "git-graph";
   };
diff --git a/pkgs/applications/version-management/git-ignore/default.nix b/pkgs/applications/version-management/git-ignore/default.nix
index 1210e31894e1..12f4f02fd0a2 100644
--- a/pkgs/applications/version-management/git-ignore/default.nix
+++ b/pkgs/applications/version-management/git-ignore/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/applications/version-management/git-interactive-rebase-tool/default.nix b/pkgs/applications/version-management/git-interactive-rebase-tool/default.nix
index 6019e2eb7a4b..835b6ddf8514 100644
--- a/pkgs/applications/version-management/git-interactive-rebase-tool/default.nix
+++ b/pkgs/applications/version-management/git-interactive-rebase-tool/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-9pUUKxPpyoX9f10ZiLWsol2rv66WzQqwa6VubRTrT9Y=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   # Compilation during tests fails if this env var is not set.
   preCheck = "export GIRT_BUILD_GIT_HASH=${version}";
diff --git a/pkgs/applications/version-management/git-mit/default.nix b/pkgs/applications/version-management/git-mit/default.nix
index 067ef1eb087d..2dc3ab74a05d 100644
--- a/pkgs/applications/version-management/git-mit/default.nix
+++ b/pkgs/applications/version-management/git-mit/default.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
diff --git a/pkgs/applications/version-management/git-nomad/default.nix b/pkgs/applications/version-management/git-nomad/default.nix
index 941b84b68fcc..566a032f9b20 100644
--- a/pkgs/applications/version-management/git-nomad/default.nix
+++ b/pkgs/applications/version-management/git-nomad/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-7CZC29y9dLpyanolO+epKd0KwmRc1iGY+sPM9f/j5hk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/applications/version-management/git-quickfix/default.nix b/pkgs/applications/version-management/git-quickfix/default.nix
index 9bc7e678d3ed..a9382ee0cb39 100644
--- a/pkgs/applications/version-management/git-quickfix/default.nix
+++ b/pkgs/applications/version-management/git-quickfix/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   doCheck = false;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
     libiconv
diff --git a/pkgs/applications/version-management/git-radar/default.nix b/pkgs/applications/version-management/git-radar/default.nix
index 1c19381c1bb1..59ec4b61d85c 100644
--- a/pkgs/applications/version-management/git-radar/default.nix
+++ b/pkgs/applications/version-management/git-radar/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     mkdir -p $out/bin
     cp git-radar fetch.sh prompt.bash prompt.zsh radar-base.sh $out
     ln -s $out/git-radar $out/bin
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       wrapProgram $out/git-radar --prefix PATH : ${lib.makeBinPath [ coreutils-prefixed ]}
     ''}
   '';
diff --git a/pkgs/applications/version-management/git-series/default.nix b/pkgs/applications/version-management/git-series/default.nix
index 9f20e7cab7b8..86277614bc4c 100644
--- a/pkgs/applications/version-management/git-series/default.nix
+++ b/pkgs/applications/version-management/git-series/default.nix
@@ -28,14 +28,14 @@ rustPlatform.buildRustPackage {
   nativeBuildInputs = [
     pkg-config
     installShellFiles
-  ] ++ lib.optionals stdenv.isDarwin [ curl ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ curl ];
 
   buildInputs = [
     libgit2
     libssh2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ curl ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ curl ];
 
   env = {
     LIBGIT2_SYS_USE_PKG_CONFIG = true;
diff --git a/pkgs/applications/version-management/git-stack/default.nix b/pkgs/applications/version-management/git-stack/default.nix
index d9792654a94b..67893b122d06 100644
--- a/pkgs/applications/version-management/git-stack/default.nix
+++ b/pkgs/applications/version-management/git-stack/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-MEhUmy4ijR/zHm/qMt4PqNGYnCfIgjNaL9SlMmXCMmc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/applications/version-management/git-sync/default.nix b/pkgs/applications/version-management/git-sync/default.nix
index 07fa41a72637..01ac29cf8c56 100644
--- a/pkgs/applications/version-management/git-sync/default.nix
+++ b/pkgs/applications/version-management/git-sync/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     git
     gnugrep
     gnused
-  ] ++ lib.optionals stdenv.isLinux [ inotify-tools ]);
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ inotify-tools ]);
 
   postFixup = ''
     wrap_path="${wrapperPath}":$out/bin
diff --git a/pkgs/applications/version-management/git-trim/default.nix b/pkgs/applications/version-management/git-trim/default.nix
index a387ec706718..60db7f8ee71e 100644
--- a/pkgs/applications/version-management/git-trim/default.nix
+++ b/pkgs/applications/version-management/git-trim/default.nix
@@ -37,7 +37,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl libgit2 ]
-    ++ lib.optionals stdenv.isDarwin [ IOKit CoreFoundation Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit CoreFoundation Security ];
 
   postInstall = ''
     install -Dm644 -t $out/share/man/man1/ docs/git-trim.1
diff --git a/pkgs/applications/version-management/git-workspace/default.nix b/pkgs/applications/version-management/git-workspace/default.nix
index 9418c7d20e58..8ed00127fdbb 100644
--- a/pkgs/applications/version-management/git-workspace/default.nix
+++ b/pkgs/applications/version-management/git-workspace/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   passthru = {
     updateScript = nix-update-script { };
diff --git a/pkgs/applications/version-management/git/default.nix b/pkgs/applications/version-management/git/default.nix
index dd1b96c29a8c..3d7f96bb5fe0 100644
--- a/pkgs/applications/version-management/git/default.nix
+++ b/pkgs/applications/version-management/git/default.nix
@@ -7,7 +7,7 @@
 , svnSupport ? false, subversionClient, perlLibs, smtpPerlLibs
 , perlSupport ? stdenv.buildPlatform == stdenv.hostPlatform
 , nlsSupport ? true
-, osxkeychainSupport ? stdenv.isDarwin
+, osxkeychainSupport ? stdenv.hostPlatform.isDarwin
 , guiSupport ? false
 , withManual ? true
 , pythonSupport ? true
@@ -20,11 +20,11 @@
 , gzip # needed at runtime by gitweb.cgi
 , withSsh ? false
 , sysctl
-, doInstallCheck ? !stdenv.isDarwin  # extremely slow on darwin
+, doInstallCheck ? !stdenv.hostPlatform.isDarwin  # extremely slow on darwin
 , tests
 }:
 
-assert osxkeychainSupport -> stdenv.isDarwin;
+assert osxkeychainSupport -> stdenv.hostPlatform.isDarwin;
 assert sendEmailSupport -> perlSupport;
 assert svnSupport -> perlSupport;
 
@@ -59,7 +59,7 @@ stdenv.mkDerivation (finalAttrs: {
     ./installCheck-path.patch
   ] ++ lib.optionals withSsh [
     ./ssh-path.patch
-  ] ++ lib.optionals (guiSupport && stdenv.isDarwin) [
+  ] ++ lib.optionals (guiSupport && stdenv.hostPlatform.isDarwin) [
     # Needed to workaround an issue in macOS where gitk shows a empty window
     # https://github.com/Homebrew/homebrew-core/issues/68798
     # https://github.com/git/git/pull/944
@@ -87,16 +87,16 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ gettext perlPackages.perl makeWrapper pkg-config ]
     ++ lib.optionals withManual [ asciidoc texinfo xmlto docbook2x
          docbook_xsl docbook_xml_dtd_45 libxslt ];
-  buildInputs = [ curl openssl zlib expat cpio (if stdenv.isFreeBSD then libiconvReal else libiconv) bash ]
+  buildInputs = [ curl openssl zlib expat cpio (if stdenv.hostPlatform.isFreeBSD then libiconvReal else libiconv) bash ]
     ++ lib.optionals perlSupport [ perlPackages.perl ]
     ++ lib.optionals guiSupport [tcl tk]
     ++ lib.optionals withpcre2 [ pcre2 ]
-    ++ lib.optionals stdenv.isDarwin [ Security CoreServices ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security CoreServices ]
     ++ lib.optionals withLibsecret [ glib libsecret ];
 
   # required to support pthread_cancel()
   NIX_LDFLAGS = lib.optionalString (stdenv.cc.isGNU && stdenv.hostPlatform.libc == "glibc") "-lgcc_s"
-              + lib.optionalString (stdenv.isFreeBSD) "-lthr";
+              + lib.optionalString (stdenv.hostPlatform.isFreeBSD) "-lthr";
 
   configureFlags = [
     "ac_cv_prog_CURL_CONFIG=${lib.getDev curl}/bin/curl-config"
@@ -118,8 +118,8 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optional (stdenv.buildPlatform == stdenv.hostPlatform) "SHELL_PATH=${stdenv.shell}"
   ++ (if perlSupport then ["PERL_PATH=${perlPackages.perl}/bin/perl"] else ["NO_PERL=1"])
   ++ (if pythonSupport then ["PYTHON_PATH=${python3}/bin/python"] else ["NO_PYTHON=1"])
-  ++ lib.optionals stdenv.isSunOS ["INSTALL=install" "NO_INET_NTOP=" "NO_INET_PTON="]
-  ++ (if stdenv.isDarwin then ["NO_APPLE_COMMON_CRYPTO=1"] else ["sysconfdir=/etc"])
+  ++ lib.optionals stdenv.hostPlatform.isSunOS ["INSTALL=install" "NO_INET_NTOP=" "NO_INET_PTON="]
+  ++ (if stdenv.hostPlatform.isDarwin then ["NO_APPLE_COMMON_CRYPTO=1"] else ["sysconfdir=/etc"])
   ++ lib.optionals stdenv.hostPlatform.isMusl ["NO_SYS_POLL_H=1" "NO_GETTEXT=YesPlease"]
   ++ lib.optional withpcre2 "USE_LIBPCRE2=1"
   ++ lib.optional (!nlsSupport) "NO_GETTEXT=1"
@@ -130,7 +130,7 @@ stdenv.mkDerivation (finalAttrs: {
   # acceptable version.
   #
   # See https://github.com/Homebrew/homebrew-core/commit/dfa3ccf1e7d3901e371b5140b935839ba9d8b706
-  ++ lib.optional stdenv.isDarwin "TKFRAMEWORK=/nonexistent"
+  ++ lib.optional stdenv.hostPlatform.isDarwin "TKFRAMEWORK=/nonexistent"
   ++ lib.optional (stdenv.hostPlatform.isFreeBSD && stdenv.hostPlatform != stdenv.buildPlatform) "uname_S=FreeBSD";
 
   disallowedReferences = lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
@@ -302,7 +302,7 @@ stdenv.mkDerivation (finalAttrs: {
     "PERL_PATH=${buildPackages.perl}/bin/perl"
   ];
 
-  nativeInstallCheckInputs = lib.optional (stdenv.isDarwin || stdenv.isFreeBSD) sysctl;
+  nativeInstallCheckInputs = lib.optional (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isFreeBSD) sysctl;
 
   preInstallCheck = ''
     installCheckFlagsArray+=(
@@ -346,7 +346,7 @@ stdenv.mkDerivation (finalAttrs: {
     # Fails reproducibly on ZFS on Linux with formD normalization
     disable_test t0021-conversion
     disable_test t3910-mac-os-precompose
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # XXX: Some tests added in 2.24.0 fail.
     # Please try to re-enable on the next release.
     disable_test t7816-grep-binary-pattern
@@ -355,7 +355,7 @@ stdenv.mkDerivation (finalAttrs: {
     disable_test t6300-for-each-ref
     # not ok 1 - populate workdir (with 2.33.1 on x86_64-darwin)
     disable_test t5003-archive-zip
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     disable_test t7527-builtin-fsmonitor
   '' + lib.optionalString stdenv.hostPlatform.isMusl ''
     # Test fails (as of 2.17.0, musl 1.1.19)
diff --git a/pkgs/applications/version-management/gitkraken/default.nix b/pkgs/applications/version-management/gitkraken/default.nix
index 68d8fabf5a49..3e2206aa633b 100644
--- a/pkgs/applications/version-management/gitkraken/default.nix
+++ b/pkgs/applications/version-management/gitkraken/default.nix
@@ -249,4 +249,4 @@ let
     dontFixup = true;
   };
 in
-if stdenv.isDarwin then darwin else linux
+if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/applications/version-management/gitnr/default.nix b/pkgs/applications/version-management/gitnr/default.nix
index a6d5a5bd61e3..3e4e1c07f852 100644
--- a/pkgs/applications/version-management/gitnr/default.nix
+++ b/pkgs/applications/version-management/gitnr/default.nix
@@ -28,9 +28,9 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libxkbcommon
     wayland
   ];
diff --git a/pkgs/applications/version-management/gitoxide/default.nix b/pkgs/applications/version-management/gitoxide/default.nix
index 9909d9829cbd..f89e80c2daa6 100644
--- a/pkgs/applications/version-management/gitoxide/default.nix
+++ b/pkgs/applications/version-management/gitoxide/default.nix
@@ -32,7 +32,7 @@ in rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ cmake pkg-config installShellFiles ];
 
-  buildInputs = [ curl ] ++ (if stdenv.isDarwin
+  buildInputs = [ curl ] ++ (if stdenv.hostPlatform.isDarwin
     then [ libiconv Security SystemConfiguration ]
     else [ openssl ]);
 
diff --git a/pkgs/applications/version-management/gittyup/default.nix b/pkgs/applications/version-management/gittyup/default.nix
index 2a7cb13d2aa4..146f2c7e9525 100644
--- a/pkgs/applications/version-management/gittyup/default.nix
+++ b/pkgs/applications/version-management/gittyup/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     openssl
     qtbase
     qttools
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreFoundation
     Security
   ]);
@@ -73,6 +73,6 @@ stdenv.mkDerivation rec {
     license = with licenses; [ mit ];
     maintainers = [ ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/version-management/guilt/default.nix b/pkgs/applications/version-management/guilt/default.nix
index aeb0eaf43f11..bca572b28bca 100644
--- a/pkgs/applications/version-management/guilt/default.nix
+++ b/pkgs/applications/version-management/guilt/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     gawk
     git
     gnused
-  ] ++ lib.optionals stdenv.isDarwin [ openssl ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ openssl ];
   makeFlags = [
     "PREFIX=$(out)"
   ];
diff --git a/pkgs/applications/version-management/lucky-commit/default.nix b/pkgs/applications/version-management/lucky-commit/default.nix
index dcaca33f0952..6e3cb2c09d5f 100644
--- a/pkgs/applications/version-management/lucky-commit/default.nix
+++ b/pkgs/applications/version-management/lucky-commit/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-8JkodGtMdYP/IIBqRcJFD5syiZi+VakDyX7VcvR0HLo=";
 
-  buildInputs = lib.optional withOpenCL (if stdenv.isDarwin then OpenCL else ocl-icd);
+  buildInputs = lib.optional withOpenCL (if stdenv.hostPlatform.isDarwin then OpenCL else ocl-icd);
 
   buildNoDefaultFeatures = !withOpenCL;
 
diff --git a/pkgs/applications/version-management/mercurial/default.nix b/pkgs/applications/version-management/mercurial/default.nix
index 466cc643c39f..5a790ff3f4d3 100644
--- a/pkgs/applications/version-management/mercurial/default.nix
+++ b/pkgs/applications/version-management/mercurial/default.nix
@@ -50,7 +50,7 @@ let
            rustc
          ];
     buildInputs = [ docutils ]
-      ++ lib.optionals stdenv.isDarwin [ ApplicationServices ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ ApplicationServices ];
 
     makeFlags = [ "PREFIX=$(out)" ]
       ++ lib.optional rustSupport "PURE=--rust";
diff --git a/pkgs/applications/version-management/p4/default.nix b/pkgs/applications/version-management/p4/default.nix
index 06e4624c8ee0..ec01f86a3af0 100644
--- a/pkgs/applications/version-management/p4/default.nix
+++ b/pkgs/applications/version-management/p4/default.nix
@@ -43,11 +43,11 @@ stdenv.mkDerivation (finalAttrs: rec {
 
   nativeBuildInputs = [ jam ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices Foundation Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Foundation Security ];
 
   outputs = [ "out" "bin" "dev" ];
 
-  hardeningDisable = lib.optionals stdenv.isDarwin [ "strictoverflow" ];
+  hardeningDisable = lib.optionals stdenv.hostPlatform.isDarwin [ "strictoverflow" ];
 
   jamFlags =
     [
@@ -59,8 +59,8 @@ stdenv.mkDerivation (finalAttrs: rec {
     ]
     ++ lib.optionals stdenv.cc.isClang [ "-sOSCOMP=clang" "-sCLANGVER=${stdenv.cc.cc.version}" ]
     ++ lib.optionals stdenv.cc.isGNU [ "-sOSCOMP=gcc" "-sGCCVER=${stdenv.cc.cc.version}" ]
-    ++ lib.optionals stdenv.isLinux [ "-sOSVER=26" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ "-sOSVER=26" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-sOSVER=1013"
       "-sMACOSX_SDK=${emptyDirectory}"
       "-sLIBC++DIR=${lib.getLib stdenv.cc.libcxx}/lib"
@@ -69,11 +69,11 @@ stdenv.mkDerivation (finalAttrs: rec {
   CCFLAGS =
     # The file contrib/optimizations/slide_hash_neon.h is missing from the
     # upstream distribution. It comes from the Android/Chromium sources.
-    lib.optionals stdenv.isAarch64 [ "-I${androidZlibContrib}" ];
+    lib.optionals stdenv.hostPlatform.isAarch64 [ "-I${androidZlibContrib}" ];
 
   "C++FLAGS" =
     # Avoid a compilation error that only occurs for 4-byte longs.
-    lib.optionals stdenv.isi686 [ "-Wno-narrowing" ]
+    lib.optionals stdenv.hostPlatform.isi686 [ "-Wno-narrowing" ]
     # See the "Header dependency changes" section of
     # https://www.gnu.org/software/gcc/gcc-11/porting_to.html for more
     # information on why we need to include these.
diff --git a/pkgs/applications/version-management/p4d/default.nix b/pkgs/applications/version-management/p4d/default.nix
index d7dcd1405575..b441fe846302 100644
--- a/pkgs/applications/version-management/p4d/default.nix
+++ b/pkgs/applications/version-management/p4d/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
 
   sourceRoot = ".";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   dontBuild = true;
 
diff --git a/pkgs/applications/version-management/p4v/default.nix b/pkgs/applications/version-management/p4v/default.nix
index 2824ed82cfa2..82aa6b57a8c5 100644
--- a/pkgs/applications/version-management/p4v/default.nix
+++ b/pkgs/applications/version-management/p4v/default.nix
@@ -21,7 +21,7 @@ let
   };
 
   mkDerivation =
-    if stdenv.isDarwin then callPackage ./darwin.nix { }
+    if stdenv.hostPlatform.isDarwin then callPackage ./darwin.nix { }
     else qt6Packages.callPackage ./linux.nix { };
 in mkDerivation {
   pname = "p4v";
diff --git a/pkgs/applications/version-management/pijul/default.nix b/pkgs/applications/version-management/pijul/default.nix
index 7503814c389d..95d974bfa145 100644
--- a/pkgs/applications/version-management/pijul/default.nix
+++ b/pkgs/applications/version-management/pijul/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ installShellFiles pkg-config ];
   buildInputs = [ openssl libsodium xxHash ]
     ++ (lib.optionals gitImportSupport [ libgit2 ])
-    ++ (lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    ++ (lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       CoreServices Security SystemConfiguration
     ]));
 
diff --git a/pkgs/applications/version-management/rapidsvn/default.nix b/pkgs/applications/version-management/rapidsvn/default.nix
index 8887d5126fde..4ed034c500f9 100644
--- a/pkgs/applications/version-management/rapidsvn/default.nix
+++ b/pkgs/applications/version-management/rapidsvn/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     apr
     aprutil
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
diff --git a/pkgs/applications/version-management/sapling/default.nix b/pkgs/applications/version-management/sapling/default.nix
index 13ff1b70f297..e19fbeb4977f 100644
--- a/pkgs/applications/version-management/sapling/default.nix
+++ b/pkgs/applications/version-management/sapling/default.nix
@@ -40,7 +40,7 @@ let
   #
   # See https://github.com/NixOS/nixpkgs/pull/198311#issuecomment-1326894295
   myCargoSetupHook = rustPlatform.cargoSetupHook.overrideAttrs (old: {
-    cargoConfig = lib.optionalString (!stdenv.isDarwin) old.cargoConfig;
+    cargoConfig = lib.optionalString (!stdenv.hostPlatform.isDarwin) old.cargoConfig;
   });
 
   src = fetchFromGitHub {
@@ -141,7 +141,7 @@ python311Packages.buildPythonApplication {
     install ${isl}/isl-dist.tar.xz $out/lib/isl-dist.tar.xz
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/sl \
       --set LOCALE_ARCHIVE "${glibcLocales}/lib/locale/locale-archive"
   '';
@@ -156,7 +156,7 @@ python311Packages.buildPythonApplication {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
     libiconv
     Cocoa
diff --git a/pkgs/applications/version-management/silver-platter/default.nix b/pkgs/applications/version-management/silver-platter/default.nix
index f1653cf10389..368cf8dcf218 100644
--- a/pkgs/applications/version-management/silver-platter/default.nix
+++ b/pkgs/applications/version-management/silver-platter/default.nix
@@ -37,9 +37,9 @@ buildPythonApplication rec {
 
   propagatedBuildInputs = [ setuptools breezy dulwich jinja2 pyyaml ruamel-yaml ];
   nativeBuildInputs = [ setuptools-rust rustPlatform.cargoSetupHook cargo rustc ]
-    ++ lib.optionals stdenv.isLinux [ pkg-config ];
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   pythonImportsCheck = [ "silver_platter" ];
 
diff --git a/pkgs/applications/version-management/stgit/default.nix b/pkgs/applications/version-management/stgit/default.nix
index 55c889ce105e..4d44724eddec 100644
--- a/pkgs/applications/version-management/stgit/default.nix
+++ b/pkgs/applications/version-management/stgit/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeCheckInputs = [
     git perl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.system_cmds libiconv
   ];
 
diff --git a/pkgs/applications/version-management/sublime-merge/common.nix b/pkgs/applications/version-management/sublime-merge/common.nix
index a978ff16357d..84f41e6e26c6 100644
--- a/pkgs/applications/version-management/sublime-merge/common.nix
+++ b/pkgs/applications/version-management/sublime-merge/common.nix
@@ -85,7 +85,7 @@ let
       for binary in ${builtins.concatStringsSep " " binaries}; do
         patchelf \
           --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
-          --set-rpath ${lib.makeLibraryPath neededLibraries}:${libGL}/lib:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.is64bit "64"} \
+          --set-rpath ${lib.makeLibraryPath neededLibraries}:${libGL}/lib:${stdenv.cc.cc.lib}/lib${lib.optionalString stdenv.hostPlatform.is64bit "64"} \
           $binary
       done
 
diff --git a/pkgs/applications/version-management/subversion/default.nix b/pkgs/applications/version-management/subversion/default.nix
index 7f0122e56c06..11d9c7fefdff 100644
--- a/pkgs/applications/version-management/subversion/default.nix
+++ b/pkgs/applications/version-management/subversion/default.nix
@@ -127,7 +127,7 @@ let
       platforms = platforms.linux ++ platforms.darwin;
     };
 
-  } // lib.optionalAttrs stdenv.isDarwin {
+  } // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     CXX = "clang++";
     CC = "clang";
     CPP = "clang -E";
diff --git a/pkgs/applications/version-management/tig/default.nix b/pkgs/applications/version-management/tig/default.nix
index b4a8533d468e..6c90d24e55bf 100644
--- a/pkgs/applications/version-management/tig/default.nix
+++ b/pkgs/applications/version-management/tig/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   autoreconfFlags = [ "-I" "tools" "-v" ];
 
   buildInputs = [ ncurses readline git ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # those files are inherently impure, we'll handle the corresponding dependencies.
   postPatch = ''
diff --git a/pkgs/applications/version-management/yadm/default.nix b/pkgs/applications/version-management/yadm/default.nix
index 0dab32e57acc..2d6c0c9089af 100644
--- a/pkgs/applications/version-management/yadm/default.nix
+++ b/pkgs/applications/version-management/yadm/default.nix
@@ -75,7 +75,7 @@ resholve.mkDerivation rec {
         gnutar
       ];
       fake = {
-        external = if stdenv.isCygwin then [ ] else [ "cygpath" ];
+        external = if stdenv.hostPlatform.isCygwin then [ ] else [ "cygpath" ];
       };
       fix = {
         "$GPG_PROGRAM" = [ "gpg" ];
diff --git a/pkgs/applications/video/dmlive/default.nix b/pkgs/applications/video/dmlive/default.nix
index db34d1da2749..5127dba204fc 100644
--- a/pkgs/applications/video/dmlive/default.nix
+++ b/pkgs/applications/video/dmlive/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config makeWrapper ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ configd Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ configd Security ];
 
   postInstall = ''
     wrapProgram "$out/bin/dmlive" --prefix PATH : "${lib.makeBinPath [ mpv ffmpeg nodejs ]}"
diff --git a/pkgs/applications/video/glaxnimate/default.nix b/pkgs/applications/video/glaxnimate/default.nix
index 9e4eda8a0790..7c6d8500d877 100644
--- a/pkgs/applications/video/glaxnimate/default.nix
+++ b/pkgs/applications/video/glaxnimate/default.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
 
   qtWrapperArgs = [ ''--prefix PATH : ${python3WithLibs}/bin'' ];
 
-  passthru.tests.version = lib.optionalAttrs stdenv.isLinux (testers.testVersion {
+  passthru.tests.version = lib.optionalAttrs stdenv.hostPlatform.isLinux (testers.testVersion {
     package = glaxnimate;
     command = "${xvfb-run}/bin/xvfb-run glaxnimate --version";
   });
diff --git a/pkgs/applications/video/gnomecast/default.nix b/pkgs/applications/video/gnomecast/default.nix
index 37bf7baec870..bea389ccc534 100644
--- a/pkgs/applications/video/gnomecast/default.nix
+++ b/pkgs/applications/video/gnomecast/default.nix
@@ -40,7 +40,7 @@ buildPythonApplication rec {
     description = "Native Linux GUI for Chromecasting local files";
     homepage = "https://github.com/keredson/gnomecast";
     license = with licenses; [ gpl3 ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "gnomecast";
   };
 }
diff --git a/pkgs/applications/video/go2tv/default.nix b/pkgs/applications/video/go2tv/default.nix
index e48b884e93d3..e7ecf2936935 100644
--- a/pkgs/applications/video/go2tv/default.nix
+++ b/pkgs/applications/video/go2tv/default.nix
@@ -36,7 +36,7 @@ buildGoModule rec {
     xorg.libXext
     xorg.libXxf86vm
     libglvnd
-  ] ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa Kernel UserNotifications ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa Kernel UserNotifications ];
 
   ldflags = [
     "-s"
diff --git a/pkgs/applications/video/gpac/default.nix b/pkgs/applications/video/gpac/default.nix
index 57da5147407e..b036e69ce8a3 100644
--- a/pkgs/applications/video/gpac/default.nix
+++ b/pkgs/applications/video/gpac/default.nix
@@ -15,13 +15,13 @@ stdenv.mkDerivation rec {
   # For most other functionality, this should probably be extended
   nativeBuildInputs = [
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
   buildInputs = [
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
   ];
 
diff --git a/pkgs/applications/video/hyperion-ng/default.nix b/pkgs/applications/video/hyperion-ng/default.nix
index 50c00e03c4ef..837e5071f440 100644
--- a/pkgs/applications/video/hyperion-ng/default.nix
+++ b/pkgs/applications/video/hyperion-ng/default.nix
@@ -37,12 +37,12 @@ stdenv.mkDerivation rec {
     qtserialport
     qtsvg
     qtx11extras
-  ] ++ lib.optional stdenv.isLinux libcec
+  ] ++ lib.optional stdenv.hostPlatform.isLinux libcec
     ++ lib.optional withRPiDispmanx libraspberrypi;
 
   nativeBuildInputs = [
     cmake wrapQtAppsHook
-  ] ++ lib.optional stdenv.isDarwin perl; # for macos bundle
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin perl; # for macos bundle
 
   patchPhase =  ''
     patchShebangs test/testrunner.sh
diff --git a/pkgs/applications/video/jellyfin-media-player/default.nix b/pkgs/applications/video/jellyfin-media-player/default.nix
index fef1a9ae80f0..013b6bdf3631 100644
--- a/pkgs/applications/video/jellyfin-media-player/default.nix
+++ b/pkgs/applications/video/jellyfin-media-player/default.nix
@@ -21,7 +21,7 @@
 , qtwebchannel
 , qtwebengine
 , qtx11extras
-, withDbus ? stdenv.isLinux
+, withDbus ? stdenv.hostPlatform.isLinux
 }:
 
 mkDerivation rec {
@@ -51,9 +51,9 @@ mkDerivation rec {
     qtwebchannel
     qtwebengine
     qtx11extras
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
     CoreAudio
     CoreFoundation
@@ -74,7 +74,7 @@ mkDerivation rec {
     "-DLINUX_X11POWER=ON"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/bin $out/Applications
     mv "$out/Jellyfin Media Player.app" $out/Applications
 
diff --git a/pkgs/applications/video/lxdvdrip/default.nix b/pkgs/applications/video/lxdvdrip/default.nix
index 6b9c8ef2fd14..32b533346dfd 100644
--- a/pkgs/applications/video/lxdvdrip/default.nix
+++ b/pkgs/applications/video/lxdvdrip/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libdvdread ];
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Command line tool to make a copy from a video DVD for private use";
     homepage = "https://sourceforge.net/projects/lxdvdrip";
     license = lib.licenses.gpl2;
diff --git a/pkgs/applications/video/mirakurun/default.nix b/pkgs/applications/video/mirakurun/default.nix
index 3d8034521c89..a1d9d58403d0 100644
--- a/pkgs/applications/video/mirakurun/default.nix
+++ b/pkgs/applications/video/mirakurun/default.nix
@@ -41,7 +41,7 @@ buildNpmPackage rec {
         bash
         nodejs
         which
-      ] ++ lib.optionals stdenv.isLinux [ v4l-utils ];
+      ] ++ lib.optionals stdenv.hostPlatform.isLinux [ v4l-utils ];
       crc32Patch = substituteAll {
         src = ./fix-musl-detection.patch;
         isMusl = if stdenv.hostPlatform.isMusl then "true" else "false";
diff --git a/pkgs/applications/video/mkvtoolnix/default.nix b/pkgs/applications/video/mkvtoolnix/default.nix
index aff2910784ed..7d4ced909df6 100644
--- a/pkgs/applications/video/mkvtoolnix/default.nix
+++ b/pkgs/applications/video/mkvtoolnix/default.nix
@@ -91,8 +91,8 @@ stdenv.mkDerivation rec {
     zlib
   ]
   ++ optionals withGUI [ cmark ]
-  ++ optionals stdenv.isLinux [ qtwayland ]
-  ++ optionals stdenv.isDarwin [ libiconv ];
+  ++ optionals stdenv.hostPlatform.isLinux [ qtwayland ]
+  ++ optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # autoupdate is not needed but it silences a ton of pointless warnings
   postPatch = ''
diff --git a/pkgs/applications/video/mlv-app/default.nix b/pkgs/applications/video/mlv-app/default.nix
index e3f61cdd8201..da9f4d5807e1 100644
--- a/pkgs/applications/video/mlv-app/default.nix
+++ b/pkgs/applications/video/mlv-app/default.nix
@@ -18,7 +18,7 @@ mkDerivation rec {
     sha256 = "sha256-RfZXHmWSjZBxNFwQ/bzHppsLS0LauURIdnkAzxAIBcU=";
   };
 
-  patches = if stdenv.isAarch64 then ./aarch64-flags.patch else null;
+  patches = if stdenv.hostPlatform.isAarch64 then ./aarch64-flags.patch else null;
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/applications/video/motion/default.nix b/pkgs/applications/video/motion/default.nix
index c3082639cae7..5e02d58977ce 100644
--- a/pkgs/applications/video/motion/default.nix
+++ b/pkgs/applications/video/motion/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ puffnfresh veprbl ];
     platforms = platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     mainProgram = "motion";
   };
 }
diff --git a/pkgs/applications/video/mpc-qt/default.nix b/pkgs/applications/video/mpc-qt/default.nix
index c9219fdf6359..c3f6981503c8 100644
--- a/pkgs/applications/video/mpc-qt/default.nix
+++ b/pkgs/applications/video/mpc-qt/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     homepage = "https://mpc-qt.github.io";
     license = licenses.gpl2;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ romildo ];
     mainProgram = "mpc-qt";
   };
diff --git a/pkgs/applications/video/mplayer/default.nix b/pkgs/applications/video/mplayer/default.nix
index 1608585de795..352c7b7edae7 100644
--- a/pkgs/applications/video/mplayer/default.nix
+++ b/pkgs/applications/video/mplayer/default.nix
@@ -5,11 +5,11 @@
 , x11Support ? true, libX11, libXext, libGLU, libGL
 , xineramaSupport ? true, libXinerama
 , xvSupport ? true, libXv
-, alsaSupport ? stdenv.isLinux, alsa-lib
+, alsaSupport ? stdenv.hostPlatform.isLinux, alsa-lib
 , screenSaverSupport ? true, libXScrnSaver
 , vdpauSupport ? false, libvdpau
-, cddaSupport ? !stdenv.isDarwin, cdparanoia
-, dvdnavSupport ? !stdenv.isDarwin, libdvdnav
+, cddaSupport ? !stdenv.hostPlatform.isDarwin, cdparanoia
+, dvdnavSupport ? !stdenv.hostPlatform.isDarwin, libdvdnav
 , dvdreadSupport ? true, libdvdread
 , bluraySupport ? true, libbluray
 , amrSupport ? false, amrnb, amrwb
@@ -112,7 +112,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional libjpegSupport libjpeg
     ++ lib.optional bs2bSupport libbs2b
     ++ lib.optional v4lSupport libv4l
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa darwin.apple_sdk.frameworks.OpenGL ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Cocoa darwin.apple_sdk.frameworks.OpenGL ]
     ;
 
   configurePlatforms = [ ];
@@ -147,8 +147,8 @@ stdenv.mkDerivation rec {
   ] ++ lib.optional (useUnfreeCodecs && codecs != null && !crossBuild) "--codecsdir=${codecs}"
     ++ lib.optional (stdenv.hostPlatform.isx86 && !crossBuild) "--enable-runtime-cpudetection"
     ++ lib.optional fribidiSupport "--enable-fribidi"
-    ++ lib.optional (stdenv.isLinux && !stdenv.isAarch64) "--enable-vidix"
-    ++ lib.optional stdenv.isLinux "--enable-fbdev"
+    ++ lib.optional (stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAarch64) "--enable-vidix"
+    ++ lib.optional stdenv.hostPlatform.isLinux "--enable-fbdev"
     ++ lib.optionals (crossBuild) [
     "--enable-cross-compile"
     "--disable-vidix-pcidb"
diff --git a/pkgs/applications/video/mpv/default.nix b/pkgs/applications/video/mpv/default.nix
index 5b255be9a1a5..9415a97770c9 100644
--- a/pkgs/applications/video/mpv/default.nix
+++ b/pkgs/applications/video/mpv/default.nix
@@ -72,37 +72,37 @@
   zimg,
 
   # Boolean
-  alsaSupport ? stdenv.isLinux,
+  alsaSupport ? stdenv.hostPlatform.isLinux,
   archiveSupport ? true,
   bluraySupport ? true,
   bs2bSupport ? true,
   cacaSupport ? true,
   cddaSupport ? false,
   cmsSupport ? true,
-  drmSupport ? stdenv.isLinux,
-  dvbinSupport ? stdenv.isLinux,
-  dvdnavSupport ? stdenv.isLinux,
+  drmSupport ? stdenv.hostPlatform.isLinux,
+  dvbinSupport ? stdenv.hostPlatform.isLinux,
+  dvdnavSupport ? stdenv.hostPlatform.isLinux,
   jackaudioSupport ? false,
   javascriptSupport ? true,
   libpngSupport ? true,
   openalSupport ? true,
-  pipewireSupport ? stdenv.isLinux,
-  pulseSupport ? config.pulseaudio or stdenv.isLinux,
+  pipewireSupport ? stdenv.hostPlatform.isLinux,
+  pulseSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux,
   rubberbandSupport ? true,
   screenSaverSupport ? true,
-  sdl2Support ? !stdenv.isDarwin,
+  sdl2Support ? !stdenv.hostPlatform.isDarwin,
   sixelSupport ? false,
   speexSupport ? true,
-  swiftSupport ? stdenv.isDarwin,
+  swiftSupport ? stdenv.hostPlatform.isDarwin,
   theoraSupport ? true,
   vaapiSupport ? x11Support || waylandSupport,
   vapoursynthSupport ? false,
   vdpauSupport ? true,
-  vulkanSupport ? stdenv.isLinux,
-  waylandSupport ? stdenv.isLinux,
-  x11Support ? stdenv.isLinux,
-  xineramaSupport ? stdenv.isLinux,
-  xvSupport ? stdenv.isLinux,
+  vulkanSupport ? stdenv.hostPlatform.isLinux,
+  waylandSupport ? stdenv.hostPlatform.isLinux,
+  x11Support ? stdenv.hostPlatform.isLinux,
+  xineramaSupport ? stdenv.hostPlatform.isLinux,
+  xvSupport ? stdenv.hostPlatform.isLinux,
   zimgSupport ? true,
 }:
 
@@ -124,7 +124,7 @@ let
     platform // lib.optionalAttrs (platform ? darwinMinVersion) { darwinMinVersion = version; };
 
   stdenv' =
-    if swiftSupport && stdenv.isDarwin && stdenv.isx86_64 then
+    if swiftSupport && stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then
       stdenv.override (old: {
         buildPlatform = overrideSDK old.buildPlatform "11.0";
         hostPlatform = overrideSDK old.hostPlatform "11.0";
@@ -194,7 +194,7 @@ stdenv'.mkDerivation (finalAttrs: {
       (lib.mesonEnable "swift-build" swiftSupport)
       (lib.mesonEnable "macos-cocoa-cb" swiftSupport)
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Toggle explicitly because it fails on darwin
       (lib.mesonEnable "videotoolbox-pl" vulkanSupport)
     ];
@@ -209,7 +209,7 @@ stdenv'.mkDerivation (finalAttrs: {
       ninja
       pkg-config
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       buildPackages.darwin.sigtool
       xcbuild.xcrun
     ]
@@ -283,9 +283,9 @@ stdenv'.mkDerivation (finalAttrs: {
     ++ lib.optionals xineramaSupport [ libXinerama ]
     ++ lib.optionals xvSupport [ libXv ]
     ++ lib.optionals zimgSupport [ zimg ]
-    ++ lib.optionals stdenv.isLinux [ nv-codec-headers-11 ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ nv-codec-headers-11 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Accelerate
       CoreFoundation
       Cocoa
@@ -293,12 +293,12 @@ stdenv'.mkDerivation (finalAttrs: {
       MediaPlayer
       VideoToolbox
     ]
-    ++ lib.optionals (stdenv.isDarwin && swiftSupport) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && swiftSupport) [
       AVFoundation
       CoreMedia
     ];
 
-  postBuild = lib.optionalString stdenv.isDarwin ''
+  postBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     pushd .. # Must be run from the source dir because it uses relative paths
     python3 TOOLS/osxbundle.py -s build/mpv
     popd
@@ -323,14 +323,14 @@ stdenv'.mkDerivation (finalAttrs: {
       printf "NoDisplay=true\n" >> umpv.desktop
       popd
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r mpv.app $out/Applications
     '';
 
   # Set RUNPATH so that libcuda in /run/opengl-driver(-32)/lib can be found.
   # See the explanation in addDriverRunpath.
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     addDriverRunpath $out/bin/mpv
     patchShebangs --update --host $out/bin/umpv $out/bin/mpv_identify.sh
   '';
diff --git a/pkgs/applications/video/mpv/scripts/videoclip.nix b/pkgs/applications/video/mpv/scripts/videoclip.nix
index bff265892eb1..3a2ac5e4e992 100644
--- a/pkgs/applications/video/mpv/scripts/videoclip.nix
+++ b/pkgs/applications/video/mpv/scripts/videoclip.nix
@@ -24,7 +24,7 @@ buildLua {
       substituteInPlace platform.lua \
       --replace \'curl\' \'${lib.getExe curl}\' \
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       --replace xclip ${lib.getExe xclip} \
       --replace wl-copy ${lib.getExe' wl-clipboard "wl-copy"}
     '';
diff --git a/pkgs/applications/video/mpv/wrapper.nix b/pkgs/applications/video/mpv/wrapper.nix
index b68f2d50c5c4..8104921aadbd 100644
--- a/pkgs/applications/video/mpv/wrapper.nix
+++ b/pkgs/applications/video/mpv/wrapper.nix
@@ -95,7 +95,7 @@ let
         makeWrapper "${mpv}/bin/mpv" "$out/bin/mpv" ${mostMakeWrapperArgs}
         rm "$out/bin/umpv"
         makeWrapper "${mpv}/bin/umpv" "$out/bin/umpv" ${umpvWrapperArgs}
-      '' + lib.optionalString stdenv.isDarwin ''
+      '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
         # wrapProgram can't operate on symlinks
         rm "$out/Applications/mpv.app/Contents/MacOS/mpv"
         makeWrapper "${mpv}/Applications/mpv.app/Contents/MacOS/mpv" "$out/Applications/mpv.app/Contents/MacOS/mpv" ${mostMakeWrapperArgs}
diff --git a/pkgs/applications/video/natron/default.nix b/pkgs/applications/video/natron/default.nix
index 5ca88c666ee8..e02aa4af610d 100644
--- a/pkgs/applications/video/natron/default.nix
+++ b/pkgs/applications/video/natron/default.nix
@@ -98,6 +98,6 @@ stdenv.mkDerivation {
     license = lib.licenses.gpl2;
     maintainers = [ maintainers.puffnfresh ];
     platforms = platforms.linux;
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/video/obs-studio/default.nix b/pkgs/applications/video/obs-studio/default.nix
index 5f3f68fb03f5..c7bcdfc4f75d 100644
--- a/pkgs/applications/video/obs-studio/default.nix
+++ b/pkgs/applications/video/obs-studio/default.nix
@@ -31,13 +31,13 @@
 , luajit
 , swig
 , python3
-, alsaSupport ? stdenv.isLinux
+, alsaSupport ? stdenv.hostPlatform.isLinux
 , alsa-lib
-, pulseaudioSupport ? config.pulseaudio or stdenv.isLinux
+, pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux
 , libpulseaudio
 , libcef
 , pciutils
-, pipewireSupport ? stdenv.isLinux
+, pipewireSupport ? stdenv.hostPlatform.isLinux
 , withFdk ? true
 , pipewire
 , libdrm
@@ -183,7 +183,7 @@ stdenv.mkDerivation (finalAttrs: {
     )
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     addDriverRunpath $out/lib/lib*.so
     addDriverRunpath $out/lib/obs-plugins/*.so
 
diff --git a/pkgs/applications/video/obs-studio/plugins/input-overlay.nix b/pkgs/applications/video/obs-studio/plugins/input-overlay.nix
index 9a2069a27133..aff145b1fc74 100644
--- a/pkgs/applications/video/obs-studio/plugins/input-overlay.nix
+++ b/pkgs/applications/video/obs-studio/plugins/input-overlay.nix
@@ -53,6 +53,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2;
     platforms = platforms.linux;
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/video/obs-studio/plugins/obs-vkcapture.nix b/pkgs/applications/video/obs-studio/plugins/obs-vkcapture.nix
index b66d3d01b234..f7e21b796c54 100644
--- a/pkgs/applications/video/obs-studio/plugins/obs-vkcapture.nix
+++ b/pkgs/applications/video/obs-studio/plugins/obs-vkcapture.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-RIDsT6eL6bUfqPiyPlecnZHu5OorcJb3Xal8pjdOpAA=";
   };
 
-  cmakeFlags = lib.optionals stdenv.isi686 [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isi686 [
     # We don't want to build the plugin for 32bit. The library integrates with
     # the 64bit plugin but it's necessary to be loaded into 32bit games.
     "-DBUILD_PLUGIN=OFF"
@@ -47,7 +47,7 @@ stdenv.mkDerivation (finalAttrs: {
     vulkan-loader
     wayland
   ]
-  ++ lib.optionals (!stdenv.isi686) [
+  ++ lib.optionals (!stdenv.hostPlatform.isi686) [
     obs-studio
   ];
 
diff --git a/pkgs/applications/video/olive-editor/default.nix b/pkgs/applications/video/olive-editor/default.nix
index 18ee73b53454..c033c1914368 100644
--- a/pkgs/applications/video/olive-editor/default.nix
+++ b/pkgs/applications/video/olive-editor/default.nix
@@ -80,7 +80,7 @@ stdenv.mkDerivation {
     qtwayland
     qtmultimedia
     qttools
-  ] ++ lib.optional stdenv.isDarwin CoreFoundation;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin CoreFoundation;
 
   meta = with lib; {
     description = "Professional open-source NLE video editor";
@@ -90,7 +90,7 @@ stdenv.mkDerivation {
     maintainers = [ maintainers.balsoft ];
     platforms = platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     mainProgram = "olive-editor";
   };
 }
diff --git a/pkgs/applications/video/openshot-qt/default.nix b/pkgs/applications/video/openshot-qt/default.nix
index 88f13ef3eb9b..ec6e309e9b82 100644
--- a/pkgs/applications/video/openshot-qt/default.nix
+++ b/pkgs/applications/video/openshot-qt/default.nix
@@ -10,7 +10,7 @@
 , qtsvg
 , qtwayland
 , wayland
-, waylandSupport ? stdenv.isLinux
+, waylandSupport ? stdenv.hostPlatform.isLinux
 , wrapGAppsHook3
 }:
 
@@ -66,7 +66,7 @@ mkDerivationWith python3.pkgs.buildPythonApplication {
     wrapProgram $out/bin/openshot-qt \
   ''
   # Fix toolbar icons on Darwin
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     --suffix QT_PLUGIN_PATH : "${lib.getBin qtsvg}/${qtbase.qtPluginPrefix}" \
   '' + ''
     "''${gappsWrapperArgs[@]}" \
diff --git a/pkgs/applications/video/pyca/default.nix b/pkgs/applications/video/pyca/default.nix
index 52463c468931..eab7c5a7d233 100644
--- a/pkgs/applications/video/pyca/default.nix
+++ b/pkgs/applications/video/pyca/default.nix
@@ -73,7 +73,7 @@ python3.pkgs.buildPythonApplication rec {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Fully functional Opencast capture agent written in Python";
     mainProgram = "pyca";
     homepage = "https://github.com/opencast/pyCA";
diff --git a/pkgs/applications/video/qmediathekview/default.nix b/pkgs/applications/video/qmediathekview/default.nix
index 0e8f3bfb584b..d08387669eb3 100644
--- a/pkgs/applications/video/qmediathekview/default.nix
+++ b/pkgs/applications/video/qmediathekview/default.nix
@@ -37,7 +37,7 @@ mkDerivation rec {
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = with maintainers; [ dotlambda ];
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     mainProgram = "QMediathekView";
   };
 }
diff --git a/pkgs/applications/video/qstopmotion/default.nix b/pkgs/applications/video/qstopmotion/default.nix
index 3172c4bb4343..2f0c66ecd1d1 100644
--- a/pkgs/applications/video/qstopmotion/default.nix
+++ b/pkgs/applications/video/qstopmotion/default.nix
@@ -79,7 +79,7 @@ mkDerivation rec {
 
     license = lib.licenses.gpl2Plus;
     maintainers = [ maintainers.leenaars ];
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     platforms = lib.platforms.gnu ++ lib.platforms.linux;
     mainProgram = "qstopmotion";
   };
diff --git a/pkgs/applications/video/sub-batch/default.nix b/pkgs/applications/video/sub-batch/default.nix
index 713a0ad2753e..48b38da01fae 100644
--- a/pkgs/applications/video/sub-batch/default.nix
+++ b/pkgs/applications/video/sub-batch/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/kl/sub-batch";
     license = licenses.mit;
     maintainers = with maintainers; [ erictapen ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "sub-batch";
   };
 }
diff --git a/pkgs/applications/video/vcs/default.nix b/pkgs/applications/video/vcs/default.nix
index 105823fec3ab..91a966bd1f4e 100644
--- a/pkgs/applications/video/vcs/default.nix
+++ b/pkgs/applications/video/vcs/default.nix
@@ -5,7 +5,7 @@
 }:
 let
   version = "1.13.4";
-  gopt = if stdenv.isLinux then util-linux else getopt;
+  gopt = if stdenv.hostPlatform.isLinux then util-linux else getopt;
   runtimeDeps = [
     coreutils ffmpeg gawk gnugrep gnused imagemagick mplayer gopt
   ];
diff --git a/pkgs/applications/video/youtube-tui/default.nix b/pkgs/applications/video/youtube-tui/default.nix
index 89d32f6f9a70..70458c7f6235 100644
--- a/pkgs/applications/video/youtube-tui/default.nix
+++ b/pkgs/applications/video/youtube-tui/default.nix
@@ -43,14 +43,14 @@ rustPlatform.buildRustPackage rec {
     xorg.libxcb
     libsixel
     mpv
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     Security
     AppKit
   ];
 
   # sixel-sys is dynamically linked to libsixel
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     wrapProgram $out/bin/youtube-tui \
       --prefix DYLD_LIBRARY_PATH : "${lib.makeLibraryPath [libsixel]}"
   '';
diff --git a/pkgs/applications/virtualization/OVMF/default.nix b/pkgs/applications/virtualization/OVMF/default.nix
index 2c1e49ac2c3d..35336ad8ad3f 100644
--- a/pkgs/applications/virtualization/OVMF/default.nix
+++ b/pkgs/applications/virtualization/OVMF/default.nix
@@ -206,6 +206,6 @@ edk2.mkDerivation projectDscPath (finalAttrs: {
     license = lib.licenses.bsd2;
     platforms = metaPlatforms;
     maintainers = with lib.maintainers; [ adamcstephens raitobezarius mjoerg ];
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/applications/virtualization/cloud-hypervisor/default.nix b/pkgs/applications/virtualization/cloud-hypervisor/default.nix
index f1dcda8df721..9af9b964825f 100644
--- a/pkgs/applications/virtualization/cloud-hypervisor/default.nix
+++ b/pkgs/applications/virtualization/cloud-hypervisor/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   separateDebugInfo = true;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = lib.optional stdenv.isAarch64 dtc;
+  buildInputs = lib.optional stdenv.hostPlatform.isAarch64 dtc;
   checkInputs = [ openssl ];
 
   OPENSSL_NO_VENDOR = true;
diff --git a/pkgs/applications/virtualization/colima/default.nix b/pkgs/applications/virtualization/colima/default.nix
index 253861178594..290186a59e3e 100644
--- a/pkgs/applications/virtualization/colima/default.nix
+++ b/pkgs/applications/virtualization/colima/default.nix
@@ -12,7 +12,7 @@
 , colima
   # use lima-bin on darwin to support native macOS virtualization
   # https://github.com/NixOS/nixpkgs/pull/209171
-, lima-drv ? if stdenv.isDarwin then lima-bin else lima
+, lima-drv ? if stdenv.hostPlatform.isDarwin then lima-bin else lima
 }:
 
 buildGoModule rec {
@@ -33,7 +33,7 @@ buildGoModule rec {
   };
 
   nativeBuildInputs = [ installShellFiles makeWrapper ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.DarwinTools ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.DarwinTools ];
 
   vendorHash = "sha256-niuBo2YUUYKH0eSApOByNLrcHqr9m5VKGoiGp1fKklg=";
 
diff --git a/pkgs/applications/virtualization/docker/default.nix b/pkgs/applications/virtualization/docker/default.nix
index 9ce338dca7b5..0d7d036d6618 100644
--- a/pkgs/applications/virtualization/docker/default.nix
+++ b/pkgs/applications/virtualization/docker/default.nix
@@ -16,11 +16,11 @@ rec {
       , sqlite, iproute2, docker-buildx, docker-compose, docker-sbom
       , iptables, e2fsprogs, xz, util-linux, xfsprogs, git
       , procps, rootlesskit, slirp4netns, fuse-overlayfs, nixosTests
-      , clientOnly ? !stdenv.isLinux, symlinkJoin
+      , clientOnly ? !stdenv.hostPlatform.isLinux, symlinkJoin
       , withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
-      , withBtrfs ? stdenv.isLinux, btrfs-progs
-      , withLvm ? stdenv.isLinux, lvm2
-      , withSeccomp ? stdenv.isLinux, libseccomp
+      , withBtrfs ? stdenv.hostPlatform.isLinux, btrfs-progs
+      , withLvm ? stdenv.hostPlatform.isLinux, lvm2
+      , withSeccomp ? stdenv.hostPlatform.isLinux, libseccomp
       , knownVulnerabilities ? []
     }:
   let
@@ -80,7 +80,7 @@ rec {
       hash = mobyHash;
     };
 
-    moby = buildGoModule (lib.optionalAttrs stdenv.isLinux rec {
+    moby = buildGoModule (lib.optionalAttrs stdenv.hostPlatform.isLinux rec {
       pname = "moby";
       inherit version;
 
@@ -95,9 +95,9 @@ rec {
         ++ lib.optional withSystemd systemd
         ++ lib.optional withSeccomp libseccomp;
 
-      extraPath = lib.optionals stdenv.isLinux (lib.makeBinPath [ iproute2 iptables e2fsprogs xz xfsprogs procps util-linux git ]);
+      extraPath = lib.optionals stdenv.hostPlatform.isLinux (lib.makeBinPath [ iproute2 iptables e2fsprogs xz xfsprogs procps util-linux git ]);
 
-      extraUserPath = lib.optionals (stdenv.isLinux && !clientOnly) (lib.makeBinPath [ rootlesskit slirp4netns fuse-overlayfs ]);
+      extraUserPath = lib.optionals (stdenv.hostPlatform.isLinux && !clientOnly) (lib.makeBinPath [ rootlesskit slirp4netns fuse-overlayfs ]);
 
       patches = lib.optionals (lib.versionOlder version "23") [
         # This patch incorporates code from a PR fixing using buildkit with the ZFS graph driver.
@@ -188,7 +188,7 @@ rec {
       makeWrapper pkg-config go-md2man go libtool installShellFiles
     ];
 
-    buildInputs = plugins ++ lib.optionals (lib.versionAtLeast version "23" && stdenv.isLinux) [
+    buildInputs = plugins ++ lib.optionals (lib.versionAtLeast version "23" && stdenv.hostPlatform.isLinux) [
       glibc
       glibc.static
     ];
diff --git a/pkgs/applications/virtualization/krunvm/default.nix b/pkgs/applications/virtualization/krunvm/default.nix
index d6da5a2742f5..392ba594189a 100644
--- a/pkgs/applications/virtualization/krunvm/default.nix
+++ b/pkgs/applications/virtualization/krunvm/default.nix
@@ -35,9 +35,9 @@ stdenv.mkDerivation rec {
     rustc
     asciidoctor
     makeWrapper
-  ] ++ lib.optionals stdenv.isDarwin [ sigtool ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ sigtool ];
 
-  buildInputs = [ libkrun ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ libkrun ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
 
   # It attaches entitlements with codesign and strip removes those,
   # voiding the entitlements and making it non-operational.
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   postFixup = ''
     wrapProgram $out/bin/krunvm \
diff --git a/pkgs/applications/virtualization/lima/bin.nix b/pkgs/applications/virtualization/lima/bin.nix
index 7549f0c1528b..ca45c58ff219 100644
--- a/pkgs/applications/virtualization/lima/bin.nix
+++ b/pkgs/applications/virtualization/lima/bin.nix
@@ -48,7 +48,7 @@ stdenvNoCC.mkDerivation {
   sourceRoot = ".";
 
   nativeBuildInputs = [ makeBinaryWrapper installShellFiles ]
-    ++ lib.optionals stdenvNoCC.isLinux [ autoPatchelfHook ];
+    ++ lib.optionals stdenvNoCC.hostPlatform.isLinux [ autoPatchelfHook ];
 
   installPhase = ''
     runHook preInstall
@@ -79,7 +79,7 @@ stdenvNoCC.mkDerivation {
 
   # Stripping removes entitlements of the binary on Darwin making it non-operational.
   # Therefore, disable stripping on Darwin.
-  dontStrip = stdenvNoCC.isDarwin;
+  dontStrip = stdenvNoCC.hostPlatform.isDarwin;
 
   passthru.updateScript =
     let
diff --git a/pkgs/applications/virtualization/lima/default.nix b/pkgs/applications/virtualization/lima/default.nix
index c57b58a008b3..318d54c77c41 100644
--- a/pkgs/applications/virtualization/lima/default.nix
+++ b/pkgs/applications/virtualization/lima/default.nix
@@ -23,7 +23,7 @@ buildGoModule rec {
   vendorHash = "sha256-P0Qnfu/cqLveAwz9jf/wTXxkoh0jvazlE5C/PcUrWsA=";
 
   nativeBuildInputs = [ makeWrapper installShellFiles ]
-    ++ lib.optionals stdenv.isDarwin [ xcbuild.xcrun sigtool ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild.xcrun sigtool ];
 
   # clean fails with read only vendor dir
   postPatch = ''
@@ -34,7 +34,7 @@ buildGoModule rec {
 
   # It attaches entitlements with codesign and strip removes those,
   # voiding the entitlements and making it non-operational.
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   buildPhase = ''
     runHook preBuild
diff --git a/pkgs/applications/virtualization/lkl/default.nix b/pkgs/applications/virtualization/lkl/default.nix
index c889dc5ff50a..751cbd021fc2 100644
--- a/pkgs/applications/virtualization/lkl/default.nix
+++ b/pkgs/applications/virtualization/lkl/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
     # Fixup build with newer Linux headers: https://github.com/lkl/linux/pull/484
     sed '1i#include <linux/sockios.h>' -i tools/lkl/lib/hijack/xlate.c
-  '' + lib.optionalString stdenv.isi686 ''
+  '' + lib.optionalString stdenv.hostPlatform.isi686 ''
     echo CONFIG_KALLSYMS=n >> arch/lkl/configs/defconfig
     echo CONFIG_KALLSYMS_BASE_RELATIVE=n >> arch/lkl/configs/defconfig
   '' + lib.optionalString firewallSupport ''
diff --git a/pkgs/applications/virtualization/podman-desktop/default.nix b/pkgs/applications/virtualization/podman-desktop/default.nix
index 015768b4ed7c..ce7d993d39de 100644
--- a/pkgs/applications/virtualization/podman-desktop/default.nix
+++ b/pkgs/applications/virtualization/podman-desktop/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
     makeWrapper
     copyDesktopItems
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
diff --git a/pkgs/applications/virtualization/podman/default.nix b/pkgs/applications/virtualization/podman/default.nix
index 9a714054aa97..95bd221a3fb9 100644
--- a/pkgs/applications/virtualization/podman/default.nix
+++ b/pkgs/applications/virtualization/podman/default.nix
@@ -22,7 +22,7 @@
 , crun
 , runc
 , conmon
-, extraRuntimes ? lib.optionals stdenv.isLinux [ runc ]  # e.g.: runc, gvisor, youki
+, extraRuntimes ? lib.optionals stdenv.hostPlatform.isLinux [ runc ]  # e.g.: runc, gvisor, youki
 , fuse-overlayfs
 , util-linux
 , iptables
@@ -39,12 +39,12 @@
 let
   # do not add qemu to this wrapper, store paths get written to the podman vm config and break when GCed
 
-  binPath = lib.makeBinPath (lib.optionals stdenv.isLinux [
+  binPath = lib.makeBinPath (lib.optionals stdenv.hostPlatform.isLinux [
     fuse-overlayfs
     util-linux
     iptables
     iproute2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     vfkit
   ] ++ extraPackages);
 
@@ -54,7 +54,7 @@ let
     # this only works for some binaries, others may need to be added to `binPath` or in the modules
     paths = [
       gvproxy
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       aardvark-dns
       catatonit # added here for the pause image and also set in `containersConf` for `init_path`
       netavark
@@ -93,7 +93,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ pkg-config go-md2man installShellFiles makeWrapper python3 ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     btrfs-progs
     gpgme
     libapparmor
@@ -110,7 +110,7 @@ buildGoModule rec {
     runHook preBuild
     patchShebangs .
     substituteInPlace Makefile --replace "/bin/bash" "${runtimeShell}"
-    ${if stdenv.isDarwin then ''
+    ${if stdenv.hostPlatform.isDarwin then ''
       make podman-remote # podman-mac-helper uses FHS paths
     '' else ''
       make bin/podman bin/rootlessport bin/quadlet
@@ -121,7 +121,7 @@ buildGoModule rec {
 
   installPhase = ''
     runHook preInstall
-    ${if stdenv.isDarwin then ''
+    ${if stdenv.hostPlatform.isDarwin then ''
       install bin/darwin/podman -Dt $out/bin
     '' else ''
       make install.bin install.systemd
@@ -134,7 +134,7 @@ buildGoModule rec {
     runHook postInstall
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     RPATH=$(patchelf --print-rpath $out/bin/.podman-wrapped)
     patchelf --set-rpath "${lib.makeLibraryPath [ systemd ]}":$RPATH $out/bin/.podman-wrapped
   '';
@@ -144,7 +144,7 @@ buildGoModule rec {
       package = podman;
       command = "HOME=$TMPDIR podman --version";
     };
-  } // lib.optionalAttrs stdenv.isLinux {
+  } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
     inherit (nixosTests) podman;
     # related modules
     inherit (nixosTests)
diff --git a/pkgs/applications/virtualization/qemu/default.nix b/pkgs/applications/virtualization/qemu/default.nix
index 6be060d44891..8625069da8b1 100644
--- a/pkgs/applications/virtualization/qemu/default.nix
+++ b/pkgs/applications/virtualization/qemu/default.nix
@@ -6,14 +6,14 @@
 , attr, libcap, libcap_ng, socat, libslirp
 , CoreServices, Cocoa, Hypervisor, Kernel, rez, setfile, vmnet
 , guestAgentSupport ? (with stdenv.hostPlatform; isLinux || isNetBSD || isOpenBSD || isSunOS || isWindows) && !minimal
-, numaSupport ? stdenv.isLinux && !stdenv.isAarch32 && !minimal, numactl
-, seccompSupport ? stdenv.isLinux && !minimal, libseccomp
+, numaSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAarch32 && !minimal, numactl
+, seccompSupport ? stdenv.hostPlatform.isLinux && !minimal, libseccomp
 , alsaSupport ? lib.hasSuffix "linux" stdenv.hostPlatform.system && !nixosTestRunner && !minimal
-, pulseSupport ? !stdenv.isDarwin && !nixosTestRunner && !minimal, libpulseaudio
-, pipewireSupport ? !stdenv.isDarwin && !nixosTestRunner && !minimal, pipewire
-, sdlSupport ? !stdenv.isDarwin && !nixosTestRunner && !minimal, SDL2, SDL2_image
-, jackSupport ? !stdenv.isDarwin && !nixosTestRunner && !minimal, libjack2
-, gtkSupport ? !stdenv.isDarwin && !xenSupport && !nixosTestRunner && !minimal, gtk3, gettext, vte, wrapGAppsHook3
+, pulseSupport ? !stdenv.hostPlatform.isDarwin && !nixosTestRunner && !minimal, libpulseaudio
+, pipewireSupport ? !stdenv.hostPlatform.isDarwin && !nixosTestRunner && !minimal, pipewire
+, sdlSupport ? !stdenv.hostPlatform.isDarwin && !nixosTestRunner && !minimal, SDL2, SDL2_image
+, jackSupport ? !stdenv.hostPlatform.isDarwin && !nixosTestRunner && !minimal, libjack2
+, gtkSupport ? !stdenv.hostPlatform.isDarwin && !xenSupport && !nixosTestRunner && !minimal, gtk3, gettext, vte, wrapGAppsHook3
 , vncSupport ? !nixosTestRunner && !minimal, libjpeg, libpng
 , smartcardSupport ? !nixosTestRunner && !minimal, libcacard
 , spiceSupport ? true && !nixosTestRunner && !minimal, spice, spice-protocol
@@ -28,7 +28,7 @@
 , libiscsiSupport ? !minimal, libiscsi
 , smbdSupport ? false, samba
 , tpmSupport ? !minimal
-, uringSupport ? stdenv.isLinux && !userOnly, liburing
+, uringSupport ? stdenv.hostPlatform.isLinux && !userOnly, liburing
 , canokeySupport ? !minimal, canokey-qemu
 , capstoneSupport ? !minimal, capstone
 , pluginsSupport ? !stdenv.hostPlatform.isStatic
@@ -39,7 +39,7 @@
 , hostCpuTargets ? (if toolsOnly
                     then [ ]
                     else if hostCpuOnly
-                    then (lib.optional stdenv.isx86_64 "i386-softmmu"
+                    then (lib.optional stdenv.hostPlatform.isx86_64 "i386-softmmu"
                           ++ ["${stdenv.hostPlatform.qemuArch}-softmmu"])
                     else null)
 , nixosTestRunner ? false
@@ -91,7 +91,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optionals gtkSupport [ wrapGAppsHook3 ]
     ++ lib.optionals enableDocs [ python3Packages.sphinx python3Packages.sphinx-rtd-theme ]
     ++ lib.optionals hexagonSupport [ glib ]
-    ++ lib.optionals stdenv.isDarwin [ sigtool ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ sigtool ]
     ++ lib.optionals (!userOnly) [ dtc ];
 
   buildInputs = [ zlib glib pixman
@@ -99,7 +99,7 @@ stdenv.mkDerivation (finalAttrs: {
     gnutls nettle curl libslirp
   ]
     ++ lib.optionals ncursesSupport [ ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices Cocoa Hypervisor Kernel rez setfile vmnet ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Cocoa Hypervisor Kernel rez setfile vmnet ]
     ++ lib.optionals seccompSupport [ libseccomp ]
     ++ lib.optionals numaSupport [ numactl ]
     ++ lib.optionals alsaSupport [ alsa-lib ]
@@ -112,8 +112,8 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optionals smartcardSupport [ libcacard ]
     ++ lib.optionals spiceSupport [ spice-protocol spice ]
     ++ lib.optionals usbredirSupport [ usbredir ]
-    ++ lib.optionals stdenv.isLinux [ libcap_ng libcap attr ]
-    ++ lib.optionals (stdenv.isLinux && !userOnly) [ libaio ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap_ng libcap attr ]
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && !userOnly) [ libaio ]
     ++ lib.optionals xenSupport [ xen ]
     ++ lib.optionals cephSupport [ ceph ]
     ++ lib.optionals glusterfsSupport [ glusterfs libuuid ]
@@ -132,7 +132,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs = [ "out" ] ++ lib.optional guestAgentSupport "ga";
   # On aarch64-linux we would shoot over the Hydra's 2G output limit.
-  separateDebugInfo = !(stdenv.isAarch64 && stdenv.isLinux);
+  separateDebugInfo = !(stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux);
 
   patches = [
     ./fix-qemu-ga.patch
@@ -179,8 +179,8 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional spiceSupport "--enable-spice"
     ++ lib.optional usbredirSupport "--enable-usb-redir"
     ++ lib.optional (hostCpuTargets != null) "--target-list=${lib.concatStringsSep "," hostCpuTargets}"
-    ++ lib.optionals stdenv.isDarwin [ "--enable-cocoa" "--enable-hvf" ]
-    ++ lib.optional (stdenv.isLinux && !userOnly) "--enable-linux-aio"
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--enable-cocoa" "--enable-hvf" ]
+    ++ lib.optional (stdenv.hostPlatform.isLinux && !userOnly) "--enable-linux-aio"
     ++ lib.optional gtkSupport "--enable-gtk"
     ++ lib.optional xenSupport "--enable-xen"
     ++ lib.optional cephSupport "--enable-rbd"
@@ -204,7 +204,7 @@ stdenv.mkDerivation (finalAttrs: {
   # voiding the entitlements and making it non-operational.
   # The alternative is to re-sign with entitlements after stripping:
   # * https://github.com/qemu/qemu/blob/v6.1.0/scripts/entitlement.sh#L25
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   postFixup = ''
     # the .desktop is both invalid and pointless
@@ -260,7 +260,7 @@ stdenv.mkDerivation (finalAttrs: {
     # xattrs are not allowed in the sandbox
     substituteInPlace ../tests/qtest/virtio-9p-test.c \
       --replace-fail mapped-xattr mapped-file
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # skip test that stalls on darwin, perhaps due to subtle differences
     # in fifo behaviour
     substituteInPlace ../tests/unit/meson.build \
diff --git a/pkgs/applications/virtualization/rvvm/default.nix b/pkgs/applications/virtualization/rvvm/default.nix
index 2d6b7d3da0c5..4693999e8f11 100644
--- a/pkgs/applications/virtualization/rvvm/default.nix
+++ b/pkgs/applications/virtualization/rvvm/default.nix
@@ -15,7 +15,7 @@
 
 assert lib.assertMsg (builtins.elem guiBackend ["sdl" "x11" "none"]) "Unsupported GUI backend";
 assert lib.assertMsg (!(enableSDL && enableX11)) "RVVM can have only one GUI backend at a time";
-assert lib.assertMsg (stdenv.isDarwin -> !enableX11) "macOS supports only SDL GUI backend";
+assert lib.assertMsg (stdenv.hostPlatform.isDarwin -> !enableX11) "macOS supports only SDL GUI backend";
 
 stdenv.mkDerivation rec {
   pname = "rvvm";
diff --git a/pkgs/applications/virtualization/sail-riscv/default.nix b/pkgs/applications/virtualization/sail-riscv/default.nix
index cda1f5d6cb20..ba98f6b2cd5a 100644
--- a/pkgs/applications/virtualization/sail-riscv/default.nix
+++ b/pkgs/applications/virtualization/sail-riscv/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/riscv/sail-riscv";
     description = "Formal specification of the RISC-V architecture, written in Sail";
     maintainers = with maintainers; [ genericnerdyusername ];
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     license = licenses.bsd2;
   };
 }
diff --git a/pkgs/applications/virtualization/virt-manager/default.nix b/pkgs/applications/virtualization/virt-manager/default.nix
index 228c2ed6cb9f..2b230a95b504 100644
--- a/pkgs/applications/virtualization/virt-manager/default.nix
+++ b/pkgs/applications/virtualization/virt-manager/default.nix
@@ -45,7 +45,7 @@ python3.pkgs.buildPythonApplication rec {
     gobject-introspection # for setup hook populating GI_TYPELIB_PATH
     docutils
     wrapGAppsHook3
-  ] ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     gst_all_1.gst-plugins-base
diff --git a/pkgs/applications/virtualization/virt-viewer/default.nix b/pkgs/applications/virtualization/virt-viewer/default.nix
index a4e32f618a04..2c368db8da94 100644
--- a/pkgs/applications/virtualization/virt-viewer/default.nix
+++ b/pkgs/applications/virtualization/virt-viewer/default.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation rec {
     gdbm
     spice-gtk
     spice-protocol
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap
   ]);
 
diff --git a/pkgs/applications/virtualization/virtualbox/default.nix b/pkgs/applications/virtualization/virtualbox/default.nix
index 3f27170311cd..437ceba29ce0 100644
--- a/pkgs/applications/virtualization/virtualbox/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/default.nix
@@ -13,7 +13,7 @@
 , javaBindings ? true, jdk # Almost doesn't affect closure size
 , pythonBindings ? false, python3
 , extensionPack ? null, fakeroot
-, pulseSupport ? config.pulseaudio or stdenv.isLinux, libpulseaudio
+, pulseSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux, libpulseaudio
 , enableHardening ? false
 , headless ? false
 , enable32bitGuests ? true
diff --git a/pkgs/applications/virtualization/xhyve/default.nix b/pkgs/applications/virtualization/xhyve/default.nix
index 2d66f8351411..a9119975a7ae 100644
--- a/pkgs/applications/virtualization/xhyve/default.nix
+++ b/pkgs/applications/virtualization/xhyve/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation rec {
     license = licenses.bsd2;
     platforms = platforms.darwin;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/applications/window-managers/hyprwm/hypr/default.nix b/pkgs/applications/window-managers/hyprwm/hypr/default.nix
index 3952256b8d41..b24c905478e4 100644
--- a/pkgs/applications/window-managers/hyprwm/hypr/default.nix
+++ b/pkgs/applications/window-managers/hyprwm/hypr/default.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # src/ewmh/ewmh.cpp:67:28: error: non-constant-expression cannot be narrowed from type 'int' to 'uint32_t' (aka 'unsigned int') in initializer list
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-c++11-narrowing";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-c++11-narrowing";
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/applications/window-managers/hyprwm/hyprpaper/default.nix b/pkgs/applications/window-managers/hyprwm/hyprpaper/default.nix
index e0b1b0e20723..771b3b1841a5 100644
--- a/pkgs/applications/window-managers/hyprwm/hyprpaper/default.nix
+++ b/pkgs/applications/window-managers/hyprwm/hyprpaper/default.nix
@@ -88,7 +88,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.bsd3;
     maintainers = with maintainers; [ wozeparrot fufexan ];
     inherit (wayland.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "hyprpaper";
   };
 })
diff --git a/pkgs/applications/window-managers/i3/default.nix b/pkgs/applications/window-managers/i3/default.nix
index 9b66a3279f8d..acb05f4ac771 100644
--- a/pkgs/applications/window-managers/i3/default.nix
+++ b/pkgs/applications/window-managers/i3/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
   '';
 
   # xvfb-run is available only on Linux
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   checkPhase = ''
     test_failed=
diff --git a/pkgs/applications/window-managers/i3/lock-blur.nix b/pkgs/applications/window-managers/i3/lock-blur.nix
index e3eabc547b5f..dc8e8250135b 100644
--- a/pkgs/applications/window-managers/i3/lock-blur.nix
+++ b/pkgs/applications/window-managers/i3/lock-blur.nix
@@ -29,6 +29,6 @@ i3lock-color.overrideAttrs (oldAttrs : rec {
     license = licenses.bsd3;
     maintainers = with maintainers; [ dan4ik605743 ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/i3lock-blur.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/i3lock-blur.x86_64-darwin
   };
 })
diff --git a/pkgs/applications/window-managers/i3/lock-color.nix b/pkgs/applications/window-managers/i3/lock-color.nix
index 584e13f55369..5a4c12a4474a 100644
--- a/pkgs/applications/window-managers/i3/lock-color.nix
+++ b/pkgs/applications/window-managers/i3/lock-color.nix
@@ -57,6 +57,6 @@ stdenv.mkDerivation rec {
     license = licenses.bsd3;
 
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/applications/window-managers/owl/default.nix b/pkgs/applications/window-managers/owl/default.nix
index 812e65830b33..15ba9de7d753 100644
--- a/pkgs/applications/window-managers/owl/default.nix
+++ b/pkgs/applications/window-managers/owl/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   };
 
   # use pregenerated nib files because generating them requires Xcode
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i "/ibtool/d" configure
     mkdir -p build/Owl.app/Contents/Resources/English.lproj
     cp ${./mac/MainMenu.nib} build/Owl.app/Contents/Resources/English.lproj/MainMenu.nib
@@ -37,10 +37,10 @@ stdenv.mkDerivation {
   nativeBuildInputs = [
     makeWrapper
     wayland-scanner
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.DarwinTools
     darwin.bootstrap_cmds
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     gnustep.make
     gnustep.wrapGNUstepAppsHook
   ];
@@ -48,9 +48,9 @@ stdenv.mkDerivation {
   buildInputs = [
     libxkbcommon
     wayland
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     gnustep.back
     gnustep.base
     gnustep.gui
@@ -64,14 +64,14 @@ stdenv.mkDerivation {
   configureScript = "../configure";
 
   # error: "Your gnustep-base was configured for the objc-nonfragile-abi but you are not using it now."
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.isDarwin) "-fobjc-runtime=gnustep-2.0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.hostPlatform.isDarwin) "-fobjc-runtime=gnustep-2.0";
 
   installPhase = ''
     runHook preInstall
 
     mkdir -p $out/{Applications,bin}
     mv Owl.app $out/Applications
-    makeWrapper $out/{Applications/Owl.app${lib.optionalString stdenv.isDarwin "/Contents/MacOS"},bin}/Owl
+    makeWrapper $out/{Applications/Owl.app${lib.optionalString stdenv.hostPlatform.isDarwin "/Contents/MacOS"},bin}/Owl
 
     runHook postInstall
   '';
diff --git a/pkgs/applications/window-managers/spectrwm/default.nix b/pkgs/applications/window-managers/spectrwm/default.nix
index 1678e5954846..52b413452e82 100644
--- a/pkgs/applications/window-managers/spectrwm/default.nix
+++ b/pkgs/applications/window-managers/spectrwm/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
   ] ++ [ libbsd ]);
 
   prePatch = let
-    subdir = if stdenv.isDarwin then "osx" else "linux";
+    subdir = if stdenv.hostPlatform.isDarwin then "osx" else "linux";
   in "cd ${subdir}";
 
   makeFlags = [ "PREFIX=${placeholder "out"}" ];
diff --git a/pkgs/build-support/add-driver-runpath/default.nix b/pkgs/build-support/add-driver-runpath/default.nix
index 08547a4453c5..56026b1fc908 100644
--- a/pkgs/build-support/add-driver-runpath/default.nix
+++ b/pkgs/build-support/add-driver-runpath/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
 
   # Named "opengl-driver" for legacy reasons, but it is the path to
   # hardware drivers installed by NixOS
-  driverLink = "/run/opengl-driver" + lib.optionalString stdenv.isi686 "-32";
+  driverLink = "/run/opengl-driver" + lib.optionalString stdenv.hostPlatform.isi686 "-32";
 
   buildCommand = ''
     mkdir -p $out/nix-support
diff --git a/pkgs/build-support/agda/default.nix b/pkgs/build-support/agda/default.nix
index ec0dfe7cc144..12dfdc4b5122 100644
--- a/pkgs/build-support/agda/default.nix
+++ b/pkgs/build-support/agda/default.nix
@@ -109,7 +109,7 @@ let
         # darwin, it seems that there is no standard such locale; luckily,
         # the referenced issue doesn't seem to surface on darwin. Hence let's
         # set this only on non-darwin.
-        LC_ALL = optionalString (!stdenv.isDarwin) "C.UTF-8";
+        LC_ALL = optionalString (!stdenv.hostPlatform.isDarwin) "C.UTF-8";
 
         meta = if meta.broken or false then meta // { hydraPlatforms = platforms.none; } else meta;
 
diff --git a/pkgs/build-support/alternatives/lapack/default.nix b/pkgs/build-support/alternatives/lapack/default.nix
index 2d62855b258a..983d59ac6f60 100644
--- a/pkgs/build-support/alternatives/lapack/default.nix
+++ b/pkgs/build-support/alternatives/lapack/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
   };
 
   # TODO: drop this forced rebuild, as it was needed just once.
-  rebuild_salt = if stdenv.isDarwin && stdenv.isx86_64 then "J4AQ" else null;
+  rebuild_salt = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then "J4AQ" else null;
 
   dontBuild = true;
   dontConfigure = true;
diff --git a/pkgs/build-support/build-bazel-package/default.nix b/pkgs/build-support/build-bazel-package/default.nix
index e752ccdb7dfc..1131f73a1836 100644
--- a/pkgs/build-support/build-bazel-package/default.nix
+++ b/pkgs/build-support/build-bazel-package/default.nix
@@ -181,7 +181,7 @@ stdenv.mkDerivation (fBuildAttrs // {
         new_target="$(readlink "$symlink" | sed "s,$NIX_BUILD_TOP,NIX_BUILD_TOP,")"
         rm "$symlink"
         ln -sf "$new_target" "$symlink"
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
         # on linux symlink permissions cannot be modified, so we modify those on darwin to match the linux ones
         ${chmodder}/bin/chmodder "$symlink"
     '' + ''
diff --git a/pkgs/build-support/build-fhsenv-bubblewrap/buildFHSEnv.nix b/pkgs/build-support/build-fhsenv-bubblewrap/buildFHSEnv.nix
index 67931a07dd40..6dfbaae3e5de 100644
--- a/pkgs/build-support/build-fhsenv-bubblewrap/buildFHSEnv.nix
+++ b/pkgs/build-support/build-fhsenv-bubblewrap/buildFHSEnv.nix
@@ -34,7 +34,7 @@
 # /lib will link to /lib32
 
 let
-  inherit (stdenv) is64bit;
+  inherit (stdenv.hostPlatform) is64bit;
 
   name = if (args ? pname && args ? version)
     then "${args.pname}-${args.version}"
diff --git a/pkgs/build-support/build-graalvm-native-image/default.nix b/pkgs/build-support/build-graalvm-native-image/default.nix
index f0e73901c8db..0ac84b000575 100644
--- a/pkgs/build-support/build-graalvm-native-image/default.nix
+++ b/pkgs/build-support/build-graalvm-native-image/default.nix
@@ -11,8 +11,8 @@
   # Default native-image arguments. You probably don't want to set this,
   # except in special cases. In most cases, use extraNativeBuildArgs instead
 , nativeImageBuildArgs ? [
-    (lib.optionalString stdenv.isDarwin "-H:-CheckToolchain")
-    (lib.optionalString (stdenv.isLinux && stdenv.isAarch64) "-H:PageSize=64K")
+    (lib.optionalString stdenv.hostPlatform.isDarwin "-H:-CheckToolchain")
+    (lib.optionalString (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) "-H:PageSize=64K")
     "-H:Name=${executable}"
     "-march=compatibility"
     "--verbose"
diff --git a/pkgs/build-support/dart/build-dart-application/default.nix b/pkgs/build-support/dart/build-dart-application/default.nix
index c99b8bbf325e..bd1d2ac1b49c 100644
--- a/pkgs/build-support/dart/build-dart-application/default.nix
+++ b/pkgs/build-support/dart/build-dart-application/default.nix
@@ -104,7 +104,7 @@ let
       dartFixupHook
       makeWrapper
       jq
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.sigtool
     ] ++
       # Ensure that we inherit the propagated build inputs from the dependencies.
diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index 8e7371728029..033bce988ae9 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -924,7 +924,7 @@ rec {
       (lib.assertMsg (maxLayers > 1)
         "the maxLayers argument of dockerTools.buildLayeredImage function must be greather than 1 (current value: ${toString maxLayers})");
       assert
-      (lib.assertMsg (enableFakechroot -> !stdenv.isDarwin) ''
+      (lib.assertMsg (enableFakechroot -> !stdenv.hostPlatform.isDarwin) ''
         cannot use `enableFakechroot` because `proot` is not portable to Darwin. Workarounds:
               - use `fakeRootCommands` with the restricted `fakeroot` environment
               - cross-compile your packages
diff --git a/pkgs/build-support/dotnet/fetch-nupkg/overrides.nix b/pkgs/build-support/dotnet/fetch-nupkg/overrides.nix
index 76e241c0cd3a..923f8b4e917d 100644
--- a/pkgs/build-support/dotnet/fetch-nupkg/overrides.nix
+++ b/pkgs/build-support/dotnet/fetch-nupkg/overrides.nix
@@ -53,7 +53,7 @@
     package:
     package.overrideAttrs (
       old:
-      lib.optionalAttrs (!stdenv.isDarwin) {
+      lib.optionalAttrs (!stdenv.hostPlatform.isDarwin) {
         setupHook = writeText "setupHook.sh" ''
           prependToVar dotnetRuntimeDeps \
             "${lib.getLib libICE}" \
@@ -67,7 +67,7 @@
     package:
     package.overrideAttrs (
       old:
-      lib.optionalAttrs stdenv.isLinux {
+      lib.optionalAttrs stdenv.hostPlatform.isLinux {
         nativeBuildInputs = old.nativeBuildInputs or [ ] ++ [ autoPatchelfHook ];
 
         buildInputs = old.buildInputs or [ ] ++ [ fontconfig ];
diff --git a/pkgs/build-support/libredirect/default.nix b/pkgs/build-support/libredirect/default.nix
index 999824167388..1b8ebcaeacdd 100644
--- a/pkgs/build-support/libredirect/default.nix
+++ b/pkgs/build-support/libredirect/default.nix
@@ -32,7 +32,7 @@ else stdenv.mkDerivation rec {
   buildPhase = ''
     runHook preBuild
 
-    ${if stdenv.isDarwin && stdenv.isAarch64 then ''
+    ${if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 then ''
     # We need the unwrapped binutils and clang:
     # We also want to build a fat library with x86_64, arm64, arm64e in there.
     # Because we use the unwrapped tools, we need to provide -isystem for headers
@@ -47,7 +47,7 @@ else stdenv.mkDerivation rec {
       -Wl,-install_name,$libName \
       -Wall -std=c99 -O3 -fPIC libredirect.c \
       -shared -o "$libName"
-    '' else if stdenv.isDarwin then ''
+    '' else if stdenv.hostPlatform.isDarwin then ''
     $CC -Wall -std=c99 -O3 -fPIC libredirect.c \
       -Wl,-install_name,$out/lib/$libName \
       -shared -o "$libName"
@@ -58,7 +58,7 @@ else stdenv.mkDerivation rec {
 
     if [ -n "$doInstallCheck" ]; then
       $CC -Wall -std=c99 \
-        ${lib.optionalString (!stdenv.isDarwin) "-D_GNU_SOURCE"} \
+        ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "-D_GNU_SOURCE"} \
         -O3 test.c -o test
     fi
 
@@ -75,7 +75,7 @@ else stdenv.mkDerivation rec {
 
     install -vD "$libName" "$out/lib/$libName"
 
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     # dylib will be rejected unless dylib rpath gets explictly set
     install_name_tool \
       -change $libName $out/lib/$libName \
@@ -84,7 +84,7 @@ else stdenv.mkDerivation rec {
     # Provide a setup hook that injects our library into every process.
     mkdir -p "$hook/nix-support"
     cat <<SETUP_HOOK > "$hook/nix-support/setup-hook"
-    ${if stdenv.isDarwin then ''
+    ${if stdenv.hostPlatform.isDarwin then ''
     export DYLD_INSERT_LIBRARIES="$out/lib/$libName"
     '' else ''
     export LD_PRELOAD="$out/lib/$libName"
diff --git a/pkgs/build-support/mitm-cache/default.nix b/pkgs/build-support/mitm-cache/default.nix
index dd44a7ddca9a..e3bce225b46b 100644
--- a/pkgs/build-support/mitm-cache/default.nix
+++ b/pkgs/build-support/mitm-cache/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-l9dnyA4Zo4jlbiCMRzUqW3NkiploVpmvxz9i896JkXU=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/build-support/node/build-npm-package/default.nix b/pkgs/build-support/node/build-npm-package/default.nix
index 4bcbf3f14f2f..52b4f5a30e2a 100644
--- a/pkgs/build-support/node/build-npm-package/default.nix
+++ b/pkgs/build-support/node/build-npm-package/default.nix
@@ -76,7 +76,7 @@ stdenv.mkDerivation (args // {
       (if npmInstallHook != null then npmInstallHook else npmHooks.npmInstallHook)
       nodejs.python
     ]
-    ++ lib.optionals stdenv.isDarwin [ cctools ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
   buildInputs = buildInputs ++ [ nodejs ];
 
   strictDeps = true;
diff --git a/pkgs/build-support/rust/build-rust-crate/default.nix b/pkgs/build-support/rust/build-rust-crate/default.nix
index 313e7601f617..db9c2d784f6b 100644
--- a/pkgs/build-support/rust/build-rust-crate/default.nix
+++ b/pkgs/build-support/rust/build-rust-crate/default.nix
@@ -283,7 +283,7 @@ crate_: lib.makeOverridable
         ++ lib.optionals stdenv.hasCC [ stdenv.cc ]
         ++ lib.optionals stdenv.buildPlatform.isDarwin [ libiconv ]
         ++ (crate.nativeBuildInputs or [ ]) ++ nativeBuildInputs_;
-      buildInputs = lib.optionals stdenv.isDarwin [ libiconv ] ++ (crate.buildInputs or [ ]) ++ buildInputs_;
+      buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ] ++ (crate.buildInputs or [ ]) ++ buildInputs_;
       dependencies = map lib.getLib dependencies_;
       buildDependencies = map lib.getLib buildDependencies_;
 
diff --git a/pkgs/build-support/rust/build-rust-crate/test/default.nix b/pkgs/build-support/rust/build-rust-crate/test/default.nix
index dd135af91965..6069ef802dde 100644
--- a/pkgs/build-support/rust/build-rust-crate/test/default.nix
+++ b/pkgs/build-support/rust/build-rust-crate/test/default.nix
@@ -529,7 +529,7 @@ let
             # Note: On darwin (which defaults to clang) we have to add
             # `-undefined dynamic_lookup` as otherwise the compilation fails.
             $CC -shared \
-              ${lib.optionalString stdenv.isDarwin "-undefined dynamic_lookup"} \
+              ${lib.optionalString stdenv.hostPlatform.isDarwin "-undefined dynamic_lookup"} \
               -o $out/lib/${name}${stdenv.hostPlatform.extensions.library} ${src}
           '';
           b = compile "libb" ''
@@ -626,7 +626,7 @@ let
       };
       expectedFiles = [
         "./bin/test_binary1"
-      ] ++ lib.optionals stdenv.isDarwin [
+      ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
         # On Darwin, the debug symbols are in a separate directory.
         "./bin/test_binary1.dSYM/Contents/Info.plist"
         "./bin/test_binary1.dSYM/Contents/Resources/DWARF/test_binary1"
diff --git a/pkgs/build-support/rust/default-crate-overrides.nix b/pkgs/build-support/rust/default-crate-overrides.nix
index 126be2ad99eb..21ca75357fbb 100644
--- a/pkgs/build-support/rust/default-crate-overrides.nix
+++ b/pkgs/build-support/rust/default-crate-overrides.nix
@@ -72,7 +72,7 @@ in
 
   cargo = attrs: {
     buildInputs = [ openssl zlib curl ]
-      ++ lib.optionals stdenv.isDarwin [ CoreFoundation Security ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation Security ];
   };
 
   libz-sys = attrs: {
@@ -281,7 +281,7 @@ in
   };
 
   security-framework-sys = attr: {
-    propagatedBuildInputs = lib.optional stdenv.isDarwin Security;
+    propagatedBuildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
   };
 
   sequoia-openpgp = attrs: {
@@ -320,7 +320,7 @@ in
   };
 
   serde_derive = attrs: {
-    buildInputs = lib.optional stdenv.isDarwin Security;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
   };
 
   servo-fontconfig-sys = attrs: {
diff --git a/pkgs/build-support/rust/lib/default.nix b/pkgs/build-support/rust/lib/default.nix
index 446760840732..322974854878 100644
--- a/pkgs/build-support/rust/lib/default.nix
+++ b/pkgs/build-support/rust/lib/default.nix
@@ -15,7 +15,7 @@ rec {
   envVars = let
 
     # As a workaround for https://github.com/rust-lang/rust/issues/89626 use lld on pkgsStatic aarch64
-    shouldUseLLD = platform: platform.isAarch64 && platform.isStatic && !stdenv.isDarwin;
+    shouldUseLLD = platform: platform.isAarch64 && platform.isStatic && !stdenv.hostPlatform.isDarwin;
 
     ccForBuild = "${pkgsBuildHost.stdenv.cc}/bin/${pkgsBuildHost.stdenv.cc.targetPrefix}cc";
     cxxForBuild = "${pkgsBuildHost.stdenv.cc}/bin/${pkgsBuildHost.stdenv.cc.targetPrefix}c++";
diff --git a/pkgs/build-support/rust/test/import-cargo-lock/git-dependency-rev-non-workspace-nested-crate/default.nix b/pkgs/build-support/rust/test/import-cargo-lock/git-dependency-rev-non-workspace-nested-crate/default.nix
index 63e3bea3ca1f..b616b293fa39 100644
--- a/pkgs/build-support/rust/test/import-cargo-lock/git-dependency-rev-non-workspace-nested-crate/default.nix
+++ b/pkgs/build-support/rust/test/import-cargo-lock/git-dependency-rev-non-workspace-nested-crate/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/build-support/setup-hooks/wrap-gapps-hook/default.nix b/pkgs/build-support/setup-hooks/wrap-gapps-hook/default.nix
index 69f9f3b145d7..b2ce7b4b2654 100644
--- a/pkgs/build-support/setup-hooks/wrap-gapps-hook/default.nix
+++ b/pkgs/build-support/setup-hooks/wrap-gapps-hook/default.nix
@@ -35,7 +35,7 @@ makeSetupHook {
 
     # TODO: remove this, packages should depend on GTK explicitly.
     gtk3
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     # It is highly probable that a program will use GSettings,
     # at minimum through GTK file chooser dialogue.
     # Let’s add a GIO module for “dconf” GSettings backend
@@ -68,7 +68,7 @@ makeSetupHook {
       basic-contains-dconf = let
         tested = basic;
       in testLib.runTest "basic-contains-dconf" (
-        testLib.skip stdenv.isDarwin ''
+        testLib.skip stdenv.hostPlatform.isDarwin ''
           ${expectSomeLineContainingYInFileXToMentionZ "${tested}/bin/foo" "GIO_EXTRA_MODULES" "${dconf.lib}/lib/gio/modules"}
           ${expectSomeLineContainingYInFileXToMentionZ "${tested}/libexec/bar" "GIO_EXTRA_MODULES" "${dconf.lib}/lib/gio/modules"}
         ''
@@ -77,7 +77,7 @@ makeSetupHook {
       basic-contains-gdk-pixbuf = let
         tested = basic;
       in testLib.runTest "basic-contains-gdk-pixbuf" (
-        testLib.skip stdenv.isDarwin ''
+        testLib.skip stdenv.hostPlatform.isDarwin ''
           ${expectSomeLineContainingYInFileXToMentionZ "${tested}/bin/foo" "GDK_PIXBUF_MODULE_FILE" "${lib.getLib librsvg}/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"}
           ${expectSomeLineContainingYInFileXToMentionZ "${tested}/libexec/bar" "GDK_PIXBUF_MODULE_FILE" "${lib.getLib librsvg}/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"}
         ''
diff --git a/pkgs/build-support/writers/scripts.nix b/pkgs/build-support/writers/scripts.nix
index 81a88391f324..999c8b4f2ae4 100644
--- a/pkgs/build-support/writers/scripts.nix
+++ b/pkgs/build-support/writers/scripts.nix
@@ -131,7 +131,7 @@ rec {
             # On darwin a script cannot be used as an interpreter in a shebang but
             # there doesn't seem to be a limit to the size of shebang and multiple
             # arguments to the interpreter are allowed.
-            if [[ -n "${toString pkgs.stdenvNoCC.isDarwin}" ]] && isScript $interpreter
+            if [[ -n "${toString pkgs.stdenvNoCC.hostPlatform.isDarwin}" ]] && isScript $interpreter
             then
               wrapperInterpreterLine=$(head -1 "$interpreter" | tail -c+3)
               # Get first word from the line (note: xargs echo remove leading spaces)
@@ -753,7 +753,7 @@ rec {
       strip ? true,
     }:
     let
-      darwinArgs = lib.optionals stdenv.isDarwin [ "-L${lib.getLib libiconv}/lib" ];
+      darwinArgs = lib.optionals stdenv.hostPlatform.isDarwin [ "-L${lib.getLib libiconv}/lib" ];
     in
     makeBinWriter {
       compileScript = ''
diff --git a/pkgs/by-name/_6/_64gram/package.nix b/pkgs/by-name/_6/_64gram/package.nix
index 61b0536ce755..65ba3347eb48 100644
--- a/pkgs/by-name/_6/_64gram/package.nix
+++ b/pkgs/by-name/_6/_64gram/package.nix
@@ -41,6 +41,6 @@ telegram-desktop.overrideAttrs (old: rec {
     changelog = "https://github.com/TDesktop-x64/tdesktop/releases/tag/v${version}";
     maintainers = with maintainers; [ clot27 ];
     mainProgram = "telegram-desktop";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/_9/_9base/package.nix b/pkgs/by-name/_9/_9base/package.nix
index 580c0ad698dc..3d523c513eec 100644
--- a/pkgs/by-name/_9/_9base/package.nix
+++ b/pkgs/by-name/_9/_9base/package.nix
@@ -75,6 +75,6 @@ stdenv.mkDerivation {
     platforms = platforms.unix;
     # needs additional work to support aarch64-darwin
     # due to usage of _DARWIN_NO_64_BIT_INODE
-    broken = stdenv.isAarch64 && stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/a5/a52dec/package.nix b/pkgs/by-name/a5/a52dec/package.nix
index 048b96787a79..53cecb99ef7e 100644
--- a/pkgs/by-name/a5/a52dec/package.nix
+++ b/pkgs/by-name/a5/a52dec/package.nix
@@ -29,9 +29,9 @@ stdenv.mkDerivation rec {
 
   # fails 1 out of 1 tests with "BAD GLOBAL SYMBOLS" on i686
   # which can also be fixed with
-  # hardeningDisable = lib.optional stdenv.isi686 "pic";
+  # hardeningDisable = lib.optional stdenv.hostPlatform.isi686 "pic";
   # but it's better to disable tests than loose ASLR on i686
-  doCheck = !stdenv.isi686;
+  doCheck = !stdenv.hostPlatform.isi686;
 
   meta = with lib; {
     description = "ATSC A/52 stream decoder";
diff --git a/pkgs/by-name/ab/abctl/package.nix b/pkgs/by-name/ab/abctl/package.nix
index 226587b0b005..bd1464c550e8 100644
--- a/pkgs/by-name/ab/abctl/package.nix
+++ b/pkgs/by-name/ab/abctl/package.nix
@@ -27,6 +27,6 @@ buildGoModule {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ xelden ];
     mainProgram = "abctl";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ac/acpica-tools/package.nix b/pkgs/by-name/ac/acpica-tools/package.nix
index b11e95be6edc..11e6f1f454c7 100644
--- a/pkgs/by-name/ac/acpica-tools/package.nix
+++ b/pkgs/by-name/ac/acpica-tools/package.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   # We can handle stripping ourselves.
   # Unless we are on Darwin. Upstream makefiles degrade coreutils install to cp if _APPLE is detected.
-  INSTALLFLAGS = lib.optionals (!stdenv.isDarwin) "-m 555";
+  INSTALLFLAGS = lib.optionals (!stdenv.hostPlatform.isDarwin) "-m 555";
 
   installFlags = [ "PREFIX=${placeholder "out"}" ];
 
diff --git a/pkgs/by-name/ae/aegisub/package.nix b/pkgs/by-name/ae/aegisub/package.nix
index 7107d548410d..da6bd3107312 100644
--- a/pkgs/by-name/ae/aegisub/package.nix
+++ b/pkgs/by-name/ae/aegisub/package.nix
@@ -38,10 +38,10 @@
   wxGTK,
   zlib,
   # Boolean guard flags
-  alsaSupport ? stdenv.isLinux,
+  alsaSupport ? stdenv.hostPlatform.isLinux,
   openalSupport ? true,
   portaudioSupport ? true,
-  pulseaudioSupport ? config.pulseaudio or stdenv.isLinux,
+  pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux,
   spellcheckSupport ? true,
   useBundledLuaJIT ? false,
 }:
@@ -102,12 +102,12 @@ stdenv.mkDerivation (finalAttrs: {
   ]
   ++ lib.optionals alsaSupport [ alsa-lib ]
   ++ lib.optionals openalSupport [
-    (if stdenv.isDarwin then OpenAL else openal)
+    (if stdenv.hostPlatform.isDarwin then OpenAL else openal)
   ]
   ++ lib.optionals portaudioSupport [ portaudio ]
   ++ lib.optionals pulseaudioSupport [ libpulseaudio ]
   ++ lib.optionals spellcheckSupport [ hunspell ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Carbon
     Cocoa
diff --git a/pkgs/by-name/ag/agate/package.nix b/pkgs/by-name/ag/agate/package.nix
index 8d83b45bec78..1d2763dd324a 100644
--- a/pkgs/by-name/ag/agate/package.nix
+++ b/pkgs/by-name/ag/agate/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.Security
     ];
diff --git a/pkgs/by-name/ag/age-plugin-fido2-hmac/package.nix b/pkgs/by-name/ag/age-plugin-fido2-hmac/package.nix
index eec840ef2197..6c9571a64d05 100644
--- a/pkgs/by-name/ag/age-plugin-fido2-hmac/package.nix
+++ b/pkgs/by-name/ag/age-plugin-fido2-hmac/package.nix
@@ -39,7 +39,7 @@ buildGoModule rec {
 
   buildInputs = [ libfido2 ];
 
-  postConfigure = lib.optional stdenv.isDarwin darwin_configure;
+  postConfigure = lib.optional stdenv.hostPlatform.isDarwin darwin_configure;
 
   meta = with lib; {
     description = "Age plugin to encrypt files with fido2 tokens using the hmac-secret extension and non-discoverable credentials";
diff --git a/pkgs/by-name/ai/aiken/package.nix b/pkgs/by-name/ai/aiken/package.nix
index 1f8186ef0015..61c66fda313a 100644
--- a/pkgs/by-name/ai/aiken/package.nix
+++ b/pkgs/by-name/ai/aiken/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/by-name/al/aligator/package.nix b/pkgs/by-name/al/aligator/package.nix
index 53346434be78..e7cb03a8771e 100644
--- a/pkgs/by-name/al/aligator/package.nix
+++ b/pkgs/by-name/al/aligator/package.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
     graphviz
     pkg-config
   ] ++ lib.optional pythonSupport python3Packages.pythonImportsCheckHook;
-  buildInputs = [ fmt ] ++ lib.optional stdenv.isDarwin llvmPackages.openmp;
+  buildInputs = [ fmt ] ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
   propagatedBuildInputs =
     [ suitesparse ]
     ++ lib.optionals pythonSupport [
diff --git a/pkgs/by-name/am/amazon-ssm-agent/package.nix b/pkgs/by-name/am/amazon-ssm-agent/package.nix
index e19669d546b0..19fc0673355b 100644
--- a/pkgs/by-name/am/amazon-ssm-agent/package.nix
+++ b/pkgs/by-name/am/amazon-ssm-agent/package.nix
@@ -63,7 +63,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.DarwinTools
   ];
 
@@ -95,7 +95,7 @@ buildGoModule rec {
       --replace-fail "/sbin/shutdown" "shutdown"
 
     echo "${version}" > VERSION
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace agent/managedInstances/fingerprint/hardwareInfo_unix.go \
       --replace-fail /usr/sbin/dmidecode ${dmidecode}/bin/dmidecode
   '';
diff --git a/pkgs/by-name/am/amfora/package.nix b/pkgs/by-name/am/amfora/package.nix
index 8e9f69b0afc4..9b658386725e 100644
--- a/pkgs/by-name/am/amfora/package.nix
+++ b/pkgs/by-name/am/amfora/package.nix
@@ -13,7 +13,7 @@ buildGoModule rec {
 
   vendorHash = "sha256-T/hnlQMDOZV+QGl7xp29sBGfb4VXcXqN6PDoBFdpp4M=";
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     sed -i "s:amfora:$out/bin/amfora:" amfora.desktop
     install -Dm644 amfora.desktop -t $out/share/applications
   '';
diff --git a/pkgs/by-name/am/amp/package.nix b/pkgs/by-name/am/amp/package.nix
index ebb662ee11c8..2d0890b63d67 100644
--- a/pkgs/by-name/am/amp/package.nix
+++ b/pkgs/by-name/am/amp/package.nix
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
       xorg.libxcb
       libgit2
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         curl
diff --git a/pkgs/by-name/an/anchor/package.nix b/pkgs/by-name/an/anchor/package.nix
index 2f4d95b732bb..40276f51a2b0 100644
--- a/pkgs/by-name/an/anchor/package.nix
+++ b/pkgs/by-name/an/anchor/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/an/android-studio-tools/package.nix b/pkgs/by-name/an/android-studio-tools/package.nix
index 06af624a8e26..2b1bca479841 100644
--- a/pkgs/by-name/an/android-studio-tools/package.nix
+++ b/pkgs/by-name/an/android-studio-tools/package.nix
@@ -19,7 +19,7 @@ stdenvNoCC.mkDerivation {
 
   postPatch = ''
     find . -type f -not -path "./bin/*" -exec chmod -x {} \;
-  '' + lib.optionalString stdenvNoCC.isDarwin ''
+  '' + lib.optionalString stdenvNoCC.hostPlatform.isDarwin ''
     for f in cmdline-tools/bin/*; do
       sed -i 's|start up script for Linux|start up script for Mac|' $f
     done
diff --git a/pkgs/by-name/an/anyrun/package.nix b/pkgs/by-name/an/anyrun/package.nix
index 624beb87fe33..d7712ea43e12 100644
--- a/pkgs/by-name/an/anyrun/package.nix
+++ b/pkgs/by-name/an/anyrun/package.nix
@@ -46,9 +46,9 @@ rustPlatform.buildRustPackage rec {
     gtk3
     gtk-layer-shell
     pango
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wayland
   ];
 
diff --git a/pkgs/by-name/ar/arcan/package.nix b/pkgs/by-name/ar/arcan/package.nix
index d472b9f13228..b31d642c703e 100644
--- a/pkgs/by-name/ar/arcan/package.nix
+++ b/pkgs/by-name/ar/arcan/package.nix
@@ -48,7 +48,7 @@
   # Boolean flags
   buildManPages ? true,
   useBuiltinLua ? true,
-  useEspeak ? !stdenv.isDarwin,
+  useEspeak ? !stdenv.hostPlatform.isDarwin,
   useStaticLibuvc ? true,
   useStaticOpenAL ? true,
   useStaticSqlite ? true,
diff --git a/pkgs/by-name/ar/arduino-cli/package.nix b/pkgs/by-name/ar/arduino-cli/package.nix
index 8d01ae38e3ec..4eb9cabebac8 100644
--- a/pkgs/by-name/ar/arduino-cli/package.nix
+++ b/pkgs/by-name/ar/arduino-cli/package.nix
@@ -47,7 +47,7 @@ let
           --replace-fail "go test" "go test -p $NIX_BUILD_CORES -skip '(${lib.concatStringsSep "|" skipTests})'"
       '';
 
-    doCheck = stdenv.isLinux;
+    doCheck = stdenv.hostPlatform.isLinux;
 
     checkPhase = ''
       runHook preCheck
@@ -60,7 +60,7 @@ let
       "-w"
       "-X github.com/arduino/arduino-cli/version.versionString=${version}"
       "-X github.com/arduino/arduino-cli/version.commit=unknown"
-    ] ++ lib.optionals stdenv.isLinux [ "-extldflags '-static'" ];
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "-extldflags '-static'" ];
 
     postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
       export HOME="$(mktemp -d)"
@@ -89,7 +89,7 @@ let
   };
 
 in
-if stdenv.isLinux then
+if stdenv.hostPlatform.isLinux then
   # buildFHSEnv is needed because the arduino-cli downloads compiler
   # toolchains from the internet that have their interpreters pointed at
   # /lib64/ld-linux-x86-64.so.2
diff --git a/pkgs/by-name/ar/armitage/package.nix b/pkgs/by-name/ar/armitage/package.nix
index 411d503728b5..7d704633a360 100644
--- a/pkgs/by-name/ar/armitage/package.nix
+++ b/pkgs/by-name/ar/armitage/package.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
     gradle
     makeWrapper
     copyDesktopItems
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     writeDarwinBundle
   ];
 
@@ -98,7 +98,7 @@ stdenv.mkDerivation (finalAttrs: {
       --prefix PATH : "${lib.makeBinPath [ jdk11 metasploit ]}"
 
     install -Dm444 dist/unix/armitage-logo.png $out/share/pixmaps/armitage.png
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p "$out/Applications/Armitage.app/Contents/MacOS"
       mkdir -p "$out/Applications/Armitage.app/Contents/Resources"
       cp dist/mac/Armitage.app/Contents/Resources/macIcon.icns $out/Applications/Armitage.app/Contents/Resources
diff --git a/pkgs/by-name/ar/arrow-cpp/package.nix b/pkgs/by-name/ar/arrow-cpp/package.nix
index 1abfe6f3b701..04a5678f38f1 100644
--- a/pkgs/by-name/ar/arrow-cpp/package.nix
+++ b/pkgs/by-name/ar/arrow-cpp/package.nix
@@ -50,13 +50,13 @@
   testers,
   enableShared ? !stdenv.hostPlatform.isStatic,
   enableFlight ? true,
-  enableJemalloc ? !stdenv.isDarwin,
+  enableJemalloc ? !stdenv.hostPlatform.isDarwin,
   enableS3 ? true,
-  enableGcs ? !stdenv.isDarwin,
+  enableGcs ? !stdenv.hostPlatform.isDarwin,
 }:
 
 assert lib.asserts.assertMsg (
-  (enableS3 && stdenv.isDarwin)
+  (enableS3 && stdenv.hostPlatform.isDarwin)
   -> (lib.versionOlder boost.version "1.69" || lib.versionAtLeast boost.version "1.70")
 ) "S3 on Darwin requires Boost != 1.69";
 
@@ -128,7 +128,7 @@ stdenv.mkDerivation (finalAttrs: {
     ninja
     autoconf # for vendored jemalloc
     flatbuffers
-  ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
   buildInputs =
     [
       boost
@@ -218,10 +218,10 @@ stdenv.mkDerivation (finalAttrs: {
       "-DPARQUET_REQUIRE_ENCRYPTION=ON"
     ]
     ++ lib.optionals (!enableShared) [ "-DARROW_TEST_LINKAGE=static" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-DCMAKE_INSTALL_RPATH=@loader_path/../lib" # needed for tools executables
     ]
-    ++ lib.optionals (!stdenv.isx86_64) [ "-DARROW_USE_SIMD=OFF" ]
+    ++ lib.optionals (!stdenv.hostPlatform.isx86_64) [ "-DARROW_USE_SIMD=OFF" ]
     ++ lib.optionals enableS3 [
       "-DAWSSDK_CORE_HEADER_FILE=${aws-sdk-cpp-arrow}/include/aws/core/Aws.h"
     ];
@@ -247,7 +247,7 @@ stdenv.mkDerivation (finalAttrs: {
           "TestS3FS.*"
           "TestS3FSGeneric.*"
         ]
-        ++ lib.optionals stdenv.isDarwin [
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [
           # TODO: revisit at 12.0.0 or when
           # https://github.com/apache/arrow/commit/295c6644ca6b67c95a662410b2c7faea0920c989
           # is available, see
diff --git a/pkgs/by-name/as/asfa/package.nix b/pkgs/by-name/as/asfa/package.nix
index 428a4e4fda42..e9be2526dd72 100644
--- a/pkgs/by-name/as/asfa/package.nix
+++ b/pkgs/by-name/as/asfa/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   nativeBuildInputs = [
     help2man
diff --git a/pkgs/by-name/as/asl/package.nix b/pkgs/by-name/as/asl/package.nix
index 5a7ca869278a..f6cbe3f46b66 100644
--- a/pkgs/by-name/as/asl/package.nix
+++ b/pkgs/by-name/as/asl/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   postPatch = lib.optionalString (!buildDocs) ''
     substituteInPlace Makefile --replace "all: binaries docs" "all: binaries"
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     substituteInPlace sysdefs.h --replace "x86_64" "aarch64"
   '';
 
diff --git a/pkgs/by-name/at/atac/package.nix b/pkgs/by-name/at/atac/package.nix
index 2a8ce471e2e1..000b41b1b904 100644
--- a/pkgs/by-name/at/atac/package.nix
+++ b/pkgs/by-name/at/atac/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     [
       oniguruma
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/at/atf/package.nix b/pkgs/by-name/at/atf/package.nix
index e77eb5244d6c..5edb2d6366b8 100644
--- a/pkgs/by-name/at/atf/package.nix
+++ b/pkgs/by-name/at/atf/package.nix
@@ -42,12 +42,12 @@ stdenv.mkDerivation (finalAttrs: {
         --replace-fail 'atf_test_program{name="srcdir_test"}' ""
     ''
     # These tests fail on Darwin.
-    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.isDarwin) ''
+    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.hostPlatform.isDarwin) ''
       substituteInPlace atf-c/detail/process_test.c \
         --replace-fail 'ATF_TP_ADD_TC(tp, status_coredump);' ""
     ''
     # This test fails on Linux.
-    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.isLinux) ''
+    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.hostPlatform.isLinux) ''
       substituteInPlace atf-c/detail/fs_test.c \
         --replace-fail 'ATF_TP_ADD_TC(tp, eaccess);' ""
     '';
diff --git a/pkgs/by-name/at/atlauncher/package.nix b/pkgs/by-name/at/atlauncher/package.nix
index 838df85a5782..a276dff1c787 100644
--- a/pkgs/by-name/at/atlauncher/package.nix
+++ b/pkgs/by-name/at/atlauncher/package.nix
@@ -6,8 +6,8 @@
   makeWrapper,
   stdenvNoCC,
 
-  gamemodeSupport ? stdenvNoCC.isLinux,
-  textToSpeechSupport ? stdenvNoCC.isLinux,
+  gamemodeSupport ? stdenvNoCC.hostPlatform.isLinux,
+  textToSpeechSupport ? stdenvNoCC.hostPlatform.isLinux,
   additionalLibs ? [ ],
 
   # dependencies
diff --git a/pkgs/by-name/at/attic-client/package.nix b/pkgs/by-name/at/attic-client/package.nix
index e9b89cf6d54b..aa84bd2a122f 100644
--- a/pkgs/by-name/at/attic-client/package.nix
+++ b/pkgs/by-name/at/attic-client/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage {
   buildInputs = [
     nix
     boost
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     SystemConfiguration
   ]);
 
diff --git a/pkgs/by-name/at/attract-mode/package.nix b/pkgs/by-name/at/attract-mode/package.nix
index 87328a78ce6f..21be9ce31441 100644
--- a/pkgs/by-name/at/attract-mode/package.nix
+++ b/pkgs/by-name/at/attract-mode/package.nix
@@ -40,11 +40,11 @@ stdenv.mkDerivation {
       sfml
       zlib
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       openal
       fontconfig
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Cocoa
       darwin.apple_sdk.frameworks.Carbon
       darwin.apple_sdk.frameworks.IOKit
@@ -61,7 +61,7 @@ stdenv.mkDerivation {
     "PKG_CONFIG=${stdenv.cc.targetPrefix}pkg-config"
     "AR=${stdenv.cc.targetPrefix}ar"
     "BUILD_EXPAT=0"
-  ] ++ lib.optionals stdenv.isDarwin [ "USE_FONTCONFIG=0" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "USE_FONTCONFIG=0" ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/by-name/at/atuin/package.nix b/pkgs/by-name/at/atuin/package.nix
index 9234e8866752..e50cdde161ef 100644
--- a/pkgs/by-name/at/atuin/package.nix
+++ b/pkgs/by-name/at/atuin/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   # TODO: unify this to one hash because updater do not support this
   cargoHash =
-    if stdenv.isLinux
+    if stdenv.hostPlatform.isLinux
     then "sha256-K4Vw/d0ZOROWujWr76I3QvfKefLhXLeFufUrgStAyjQ="
     else "sha256-8NAfE7cGFT64ntNXK9RT0D/MbDJweN7vvsG/KlrY4K4=";
 
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk_11_0.frameworks.AppKit
     darwin.apple_sdk_11_0.frameworks.Security
diff --git a/pkgs/by-name/au/autopsy/package.nix b/pkgs/by-name/au/autopsy/package.nix
index 72f5130a5109..a2693eb5b8bc 100644
--- a/pkgs/by-name/au/autopsy/package.nix
+++ b/pkgs/by-name/au/autopsy/package.nix
@@ -1,6 +1,6 @@
 { stdenv, lib, makeWrapper, fetchzip, testdisk, imagemagick, jdk, findutils, sleuthkit, ... }:
 let
-  jdkWithJfx = jdk.override (lib.optionalAttrs stdenv.isLinux {
+  jdkWithJfx = jdk.override (lib.optionalAttrs stdenv.hostPlatform.isLinux {
     enableJavaFX = true;
   });
 in
diff --git a/pkgs/by-name/av/avbroot/package.nix b/pkgs/by-name/av/avbroot/package.nix
index 8e992e5c3a36..cc7fe1494e65 100644
--- a/pkgs/by-name/av/avbroot/package.nix
+++ b/pkgs/by-name/av/avbroot/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     protobuf
   ];
 
-  buildInputs = [ bzip2 ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = [ bzip2 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   meta = {
     description = "Sign (and root) Android A/B OTAs with custom keys while preserving Android Verified Boot";
diff --git a/pkgs/by-name/aw/aws-sso-cli/package.nix b/pkgs/by-name/aw/aws-sso-cli/package.nix
index 6e5b72b1f2d3..b77680f058f2 100644
--- a/pkgs/by-name/aw/aws-sso-cli/package.nix
+++ b/pkgs/by-name/aw/aws-sso-cli/package.nix
@@ -37,7 +37,7 @@ buildGoModule rec {
       "TestAWSConsoleUrl"
       "TestAWSFederatedUrl"
       "TestServerWithSSL" # https://github.com/synfinatic/aws-sso-cli/issues/1030 -- remove when version >= 2.x
-    ] ++ lib.optionals stdenv.isDarwin [ "TestDetectShellBash" ];
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "TestDetectShellBash" ];
   in
     [ "-skip=^${builtins.concatStringsSep "$|^" skippedTests}$" ];
 
diff --git a/pkgs/by-name/aw/aws-vault/package.nix b/pkgs/by-name/aw/aws-vault/package.nix
index e503848f10b2..a99ed43ea7c0 100644
--- a/pkgs/by-name/aw/aws-vault/package.nix
+++ b/pkgs/by-name/aw/aws-vault/package.nix
@@ -24,7 +24,7 @@ buildGoModule rec {
   postInstall = ''
     # make xdg-open overrideable at runtime
     # aws-vault uses https://github.com/skratchdot/open-golang/blob/master/open/open.go to open links
-    ${lib.optionalString (!stdenv.isDarwin) "wrapProgram $out/bin/aws-vault --suffix PATH : ${lib.makeBinPath [ xdg-utils ]}"}
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "wrapProgram $out/bin/aws-vault --suffix PATH : ${lib.makeBinPath [ xdg-utils ]}"}
     installShellCompletion --cmd aws-vault \
       --bash $src/contrib/completions/bash/aws-vault.bash \
       --fish $src/contrib/completions/fish/aws-vault.fish \
diff --git a/pkgs/by-name/az/azure-cli/package.nix b/pkgs/by-name/az/azure-cli/package.nix
index 2a73b3da9fac..d9bfd888dd7b 100644
--- a/pkgs/by-name/az/azure-cli/package.nix
+++ b/pkgs/by-name/az/azure-cli/package.nix
@@ -191,7 +191,7 @@ py.pkgs.toPythonApplication (
         chardet
         colorama
       ]
-      ++ lib.optional stdenv.isLinux distro
+      ++ lib.optional stdenv.hostPlatform.isLinux distro
       ++ [
         fabric
         javaproperties
diff --git a/pkgs/by-name/az/azure-cli/python-packages.nix b/pkgs/by-name/az/azure-cli/python-packages.nix
index 97e2d0b1922a..5bde74450419 100644
--- a/pkgs/by-name/az/azure-cli/python-packages.nix
+++ b/pkgs/by-name/az/azure-cli/python-packages.nix
@@ -69,7 +69,7 @@ let
 
         nativeCheckInputs = with self; [ pytest ];
 
-        doCheck = stdenv.isLinux;
+        doCheck = stdenv.hostPlatform.isLinux;
 
         # ignore tests that does network call, or assume powershell
         checkPhase = ''
diff --git a/pkgs/by-name/az/azurite/package.nix b/pkgs/by-name/az/azurite/package.nix
index 8f70c247fc1e..de63807785f2 100644
--- a/pkgs/by-name/az/azurite/package.nix
+++ b/pkgs/by-name/az/azurite/package.nix
@@ -22,9 +22,9 @@ buildNpmPackage rec {
   npmDepsHash = "sha256-+ptjsz2MDIB/aqu4UxkBLCcehtamFdmswNUsHs23LuE=";
 
   nativeBuildInputs = [ pkg-config python3 ];
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libsecret
-  ] ++ lib.optionals stdenv.isDarwin (with darwin; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin; [
     Security
     apple_sdk.frameworks.AppKit
   ]);
diff --git a/pkgs/by-name/ba/barrage/package.nix b/pkgs/by-name/ba/barrage/package.nix
index 497468cb489a..ff879e56924a 100644
--- a/pkgs/by-name/ba/barrage/package.nix
+++ b/pkgs/by-name/ba/barrage/package.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "barrage";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     inherit (SDL.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ba/bat/package.nix b/pkgs/by-name/ba/bat/package.nix
index 9e4132bc0b46..716ad80de725 100644
--- a/pkgs/by-name/ba/bat/package.nix
+++ b/pkgs/by-name/ba/bat/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config installShellFiles makeWrapper ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   postInstall = ''
     installManPage $releaseDir/build/bat-*/out/assets/manual/bat.1
diff --git a/pkgs/by-name/ba/batmon/package.nix b/pkgs/by-name/ba/batmon/package.nix
index 5e5cf3f6501f..0d51bc0ec83b 100644
--- a/pkgs/by-name/ba/batmon/package.nix
+++ b/pkgs/by-name/ba/batmon/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     license = licenses.asl20;
     mainProgram = "batmon";
     platforms = with platforms; unix ++ windows;
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     maintainers = with maintainers; [ _6543 ];
   };
 }
diff --git a/pkgs/by-name/bc/bcc/package.nix b/pkgs/by-name/bc/bcc/package.nix
index 3d2235a0a0b3..6cc3c1ce3360 100644
--- a/pkgs/by-name/bc/bcc/package.nix
+++ b/pkgs/by-name/bc/bcc/package.nix
@@ -22,7 +22,7 @@ python3Packages.buildPythonApplication rec {
   pname = "bcc";
   version = "0.31.0";
 
-  disabled = !stdenv.isLinux;
+  disabled = !stdenv.hostPlatform.isLinux;
 
   src = fetchFromGitHub {
     owner = "iovisor";
diff --git a/pkgs/by-name/bd/bdf2ttf/package.nix b/pkgs/by-name/bd/bdf2ttf/package.nix
index c12100bb3662..399c07ee0b65 100644
--- a/pkgs/by-name/bd/bdf2ttf/package.nix
+++ b/pkgs/by-name/bd/bdf2ttf/package.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ ners ];
     platforms = lib.platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/bi/bicep/package.nix b/pkgs/by-name/bi/bicep/package.nix
index d8246c545890..9cd6e1a07f15 100644
--- a/pkgs/by-name/bi/bicep/package.nix
+++ b/pkgs/by-name/bi/bicep/package.nix
@@ -30,7 +30,7 @@ buildDotnetModule rec {
 
   dotnet-runtime = dotnetCorePackages.runtime_8_0;
 
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64); # mono is not available on aarch64-darwin
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64); # mono is not available on aarch64-darwin
 
   nativeCheckInputs = [ mono ];
 
diff --git a/pkgs/by-name/bi/binsider/package.nix b/pkgs/by-name/bi/binsider/package.nix
index 3b85edb9b6e7..b5a1b5503666 100644
--- a/pkgs/by-name/bi/binsider/package.nix
+++ b/pkgs/by-name/bi/binsider/package.nix
@@ -31,6 +31,6 @@ rustPlatform.buildRustPackage rec {
     ];
     maintainers = with maintainers; [ samueltardieu ];
     mainProgram = "binsider";
-    broken = stdenv.isDarwin || stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/bi/biome/package.nix b/pkgs/by-name/bi/biome/package.nix
index c37b4f6f66e5..678a1aa71fdb 100644
--- a/pkgs/by-name/bi/biome/package.nix
+++ b/pkgs/by-name/bi/biome/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
       rust-jemalloc-sys
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
     ];
 
diff --git a/pkgs/by-name/bi/bite/package.nix b/pkgs/by-name/bi/bite/package.nix
index de072e33d470..4dd9e4384142 100644
--- a/pkgs/by-name/bi/bite/package.nix
+++ b/pkgs/by-name/bi/bite/package.nix
@@ -60,14 +60,14 @@ rustPlatform.buildRustPackage rec {
       pango
       vulkan-loader
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.CoreGraphics
       darwin.apple_sdk.frameworks.Foundation
       darwin.apple_sdk.frameworks.Metal
       darwin.apple_sdk.frameworks.QuartzCore
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       wayland
     ];
 
@@ -76,7 +76,7 @@ rustPlatform.buildRustPackage rec {
       libxkbcommon
       vulkan-loader
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       wayland
     ];
 
@@ -105,6 +105,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [vinnymeller];
     mainProgram = "bite";
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/by-name/bi/bitwarden-cli/package.nix b/pkgs/by-name/bi/bitwarden-cli/package.nix
index d6fa628ae91e..2fe5a8e36878 100644
--- a/pkgs/by-name/bi/bitwarden-cli/package.nix
+++ b/pkgs/by-name/bi/bitwarden-cli/package.nix
@@ -32,7 +32,7 @@ buildNpmPackage rec {
 
   nativeBuildInputs = [
     (python3.withPackages (ps: with ps; [ setuptools ]))
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
     xcbuild.xcrun
   ];
diff --git a/pkgs/by-name/bl/blastem/package.nix b/pkgs/by-name/bl/blastem/package.nix
index d1ba8d3cb826..2bdd9ed5f477 100644
--- a/pkgs/by-name/bl/blastem/package.nix
+++ b/pkgs/by-name/bl/blastem/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   # will probably be fixed in https://github.com/NixOS/nixpkgs/pull/302481
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
         --replace-fail "-flto" ""
   '';
diff --git a/pkgs/by-name/bl/bleep/package.nix b/pkgs/by-name/bl/bleep/package.nix
index 190f971ffb82..19a007dd70aa 100644
--- a/pkgs/by-name/bl/bleep/package.nix
+++ b/pkgs/by-name/bl/bleep/package.nix
@@ -36,7 +36,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     installShellFiles
     makeWrapper
-  ] ++ lib.optional stdenvNoCC.isLinux autoPatchelfHook;
+  ] ++ lib.optional stdenvNoCC.hostPlatform.isLinux autoPatchelfHook;
 
   buildInputs = [ zlib ];
 
@@ -49,7 +49,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   dontAutoPatchelf = true;
 
   postFixup =
-    lib.optionalString stdenvNoCC.isLinux ''
+    lib.optionalString stdenvNoCC.hostPlatform.isLinux ''
       autoPatchelf $out
     ''
     + ''
diff --git a/pkgs/by-name/bl/blockattack/package.nix b/pkgs/by-name/bl/blockattack/package.nix
index 35b765920a0a..0e8a3cbc4d51 100644
--- a/pkgs/by-name/bl/blockattack/package.nix
+++ b/pkgs/by-name/bl/blockattack/package.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation (finalAttrs: {
   meta = {
     homepage = "https://blockattack.net/";
     description = "Open source clone of Panel de Pon (aka Tetris Attack)";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     changelog = "https://github.com/blockattack/blockattack-game/blob/${finalAttrs.src.rev}/CHANGELOG.md";
     license = with lib.licenses; [ gpl2Plus ];
     mainProgram = "blockattack";
diff --git a/pkgs/by-name/bl/blockbench/package.nix b/pkgs/by-name/bl/blockbench/package.nix
index a8458255c714..42d619d4302a 100644
--- a/pkgs/by-name/bl/blockbench/package.nix
+++ b/pkgs/by-name/bl/blockbench/package.nix
@@ -23,7 +23,7 @@ buildNpmPackage rec {
 
   nativeBuildInputs =
     [ makeWrapper ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       imagemagick # for icon resizing
       copyDesktopItems
     ];
@@ -33,7 +33,7 @@ buildNpmPackage rec {
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = 1;
 
   # disable code signing on Darwin
-  postConfigure = lib.optionalString stdenv.isDarwin ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export CSC_IDENTITY_AUTO_DISCOVERY=false
     sed -i "/afterSign/d" package.json
   '';
@@ -54,13 +54,13 @@ buildNpmPackage rec {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r dist/mac*/Blockbench.app $out/Applications
       makeWrapper $out/Applications/Blockbench.app/Contents/MacOS/Blockbench $out/bin/blockbench
     ''}
 
-    ${lib.optionalString (!stdenv.isDarwin) ''
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       mkdir -p $out/share/blockbench
       cp -r dist/*-unpacked/{locales,resources{,.pak}} $out/share/blockbench
 
diff --git a/pkgs/by-name/bo/bochs/package.nix b/pkgs/by-name/bo/bochs/package.nix
index 963f242d1ed7..ab06e54c484e 100644
--- a/pkgs/by-name/bo/bochs/package.nix
+++ b/pkgs/by-name/bo/bochs/package.nix
@@ -19,8 +19,8 @@
 , wxGTK32
 , enableSDL2 ? true
 , enableTerm ? true
-, enableWx ? !stdenv.isDarwin
-, enableX11 ? !stdenv.isDarwin
+, enableWx ? !stdenv.hostPlatform.isDarwin
+, enableX11 ? !stdenv.hostPlatform.isDarwin
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
     libGLU
     libX11
     libXpm
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
@@ -123,7 +123,7 @@ stdenv.mkDerivation (finalAttrs: {
   ] ++ lib.optionals enableX11 [
     "--with-x"
     "--with-x11"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "--enable-e1000"
     "--enable-es1370"
     "--enable-ne2000"
diff --git a/pkgs/by-name/bo/boehmgc/package.nix b/pkgs/by-name/bo/boehmgc/package.nix
index 4a5418a3206b..1c46aea7f9ca 100644
--- a/pkgs/by-name/bo/boehmgc/package.nix
+++ b/pkgs/by-name/bo/boehmgc/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   outputs = [ "out" "dev" "doc" ];
-  separateDebugInfo = stdenv.isLinux && stdenv.hostPlatform.libc != "musl";
+  separateDebugInfo = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.libc != "musl";
 
   nativeBuildInputs = [
     autoreconfHook
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # `gctest` fails under x86_64 emulation on aarch64-darwin
   # and also on aarch64-linux (qemu-user)
-  doCheck = !((stdenv.isDarwin && stdenv.isx86_64) || (stdenv.isLinux && stdenv.isAarch64));
+  doCheck = !((stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64));
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/by-name/bo/boinctui/package.nix b/pkgs/by-name/bo/boinctui/package.nix
index faf8ca709dd4..eca32ef37731 100644
--- a/pkgs/by-name/bo/boinctui/package.nix
+++ b/pkgs/by-name/bo/boinctui/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
   '';
 
   outputs = [ "out" "man" ];
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/by-name/br/bruno/package.nix b/pkgs/by-name/br/bruno/package.nix
index 7576636a5bf6..6b271c571e07 100644
--- a/pkgs/by-name/br/bruno/package.nix
+++ b/pkgs/by-name/br/bruno/package.nix
@@ -21,7 +21,7 @@
 let
   # fix for: https://github.com/NixOS/nixpkgs/issues/272156
   buildNpmPackage' = buildNpmPackage.override {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 in
 buildNpmPackage' rec {
@@ -47,7 +47,7 @@ buildNpmPackage' rec {
       (writeShellScriptBin "phantomjs" "echo 2.1.1")
       pkg-config
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       makeWrapper
       copyDesktopItems
     ];
@@ -58,7 +58,7 @@ buildNpmPackage' rec {
       cairo
       pango
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.CoreText
     ];
 
@@ -100,7 +100,7 @@ buildNpmPackage' rec {
     pushd packages/bruno-electron
 
     ${
-      if stdenv.isDarwin then
+      if stdenv.hostPlatform.isDarwin then
         ''
           cp -r ${electron.dist}/Electron.app ./
           find ./Electron.app -name 'Info.plist' | xargs -d '\n' chmod +rw
@@ -136,7 +136,7 @@ buildNpmPackage' rec {
 
 
     ${
-      if stdenv.isDarwin then
+      if stdenv.hostPlatform.isDarwin then
         ''
           mkdir -p $out/Applications
 
diff --git a/pkgs/by-name/bs/bsc/package.nix b/pkgs/by-name/bs/bsc/package.nix
index bb0e762e46f4..03bbb66e5550 100644
--- a/pkgs/by-name/bs/bsc/package.nix
+++ b/pkgs/by-name/bs/bsc/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  buildInputs = lib.optional stdenv.isDarwin llvmPackages.openmp;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   makeFlags = [
     "CC=$(CXX)"
diff --git a/pkgs/by-name/bu/buckle/package.nix b/pkgs/by-name/bu/buckle/package.nix
index c4139ebe5805..51c5e1486d54 100644
--- a/pkgs/by-name/bu/buckle/package.nix
+++ b/pkgs/by-name/bu/buckle/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-eWhcDzw+6I5N0dse5avwhcQ/y6YZ6b3QKyBwWBrA/xo=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/bu/bulk_extractor/package.nix b/pkgs/by-name/bu/bulk_extractor/package.nix
index 58bbb1edd6d1..25d38c6c35ca 100644
--- a/pkgs/by-name/bu/bulk_extractor/package.nix
+++ b/pkgs/by-name/bu/bulk_extractor/package.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation (finalAttrs: {
     aclocal -I m4
   '';
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/be20_api/feature_recorder_set.cpp --replace-fail '#warn ' '#warning '
   '';
 
diff --git a/pkgs/by-name/bu/bulloak/package.nix b/pkgs/by-name/bu/bulloak/package.nix
index dc8584fb6707..6b395068e914 100644
--- a/pkgs/by-name/bu/bulloak/package.nix
+++ b/pkgs/by-name/bu/bulloak/package.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-lj/wmLu4cBjDjzMD8DlIz+6Rnag0h+zWiE7lfcTC7lY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   # tests run in CI on the source repo
   doCheck = false;
diff --git a/pkgs/by-name/bu/bunbun/package.nix b/pkgs/by-name/bu/bunbun/package.nix
index ab9068277871..2d042f08d8f9 100644
--- a/pkgs/by-name/bu/bunbun/package.nix
+++ b/pkgs/by-name/bu/bunbun/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-CcGfaSyCMv0Wm4QsYASBwEnpX8fKbLHRqyEcUmj2w2o=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks;
     [
       CoreFoundation
diff --git a/pkgs/by-name/bu/bup/package.nix b/pkgs/by-name/bu/bup/package.nix
index 91fb2b3c3f71..c9fe3986611c 100644
--- a/pkgs/by-name/bu/bup/package.nix
+++ b/pkgs/by-name/bu/bup/package.nix
@@ -23,7 +23,7 @@ let
       setuptools
       tornado
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       pyxattr
       pylibacl
       fuse
diff --git a/pkgs/by-name/bu/bustle/package.nix b/pkgs/by-name/bu/bustle/package.nix
index a6e3e6474729..876d63ff014f 100644
--- a/pkgs/by-name/bu/bustle/package.nix
+++ b/pkgs/by-name/bu/bustle/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-r29Z+6P+yuCpOBUE3vkESd15lcGXs5+ZTBiQ9nW6DJ4=";
   };
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Set the location to gettext to ensure the nixpkgs one on Darwin instead of the vendored one.
     # The vendored gettext does not build with clang 16.
     GETTEXT_BIN_DIR = "${lib.getBin buildPackages.gettext}/bin";
@@ -60,7 +60,7 @@ stdenv.mkDerivation (finalAttrs: {
     glib
     gtk4
     libadwaita
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
     libiconv
   ];
diff --git a/pkgs/by-name/c2/c2patool/package.nix b/pkgs/by-name/c2/c2patool/package.nix
index c6a3645f8b26..29cb68b1f4e0 100644
--- a/pkgs/by-name/c2/c2patool/package.nix
+++ b/pkgs/by-name/c2/c2patool/package.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
   ];
   buildInputs = [
     openssl
-  ] ++ lib.optional stdenv.isDarwin [
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.Carbon
diff --git a/pkgs/by-name/ca/cadzinho/package.nix b/pkgs/by-name/ca/cadzinho/package.nix
index 6b24ef5a18f7..5a12cd1e54bc 100644
--- a/pkgs/by-name/ca/cadzinho/package.nix
+++ b/pkgs/by-name/ca/cadzinho/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     substituteInPlace Makefile --replace-fail "-lGLEW" "-lGLEW -lSDL2_net"
   '';
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [ SDL2 SDL2_net glew lua5_4 ];
 
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE = toString ([
     "-I${SDL2.dev}/include/SDL2"
     "-I${SDL2_net.dev}/include/SDL2"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # https://github.com/llvm/llvm-project/issues/62254
     "-fno-builtin-strrchr"
   ]);
diff --git a/pkgs/by-name/ca/caligula/package.nix b/pkgs/by-name/ca/caligula/package.nix
index 6cb36421eaae..d957b2c79a92 100644
--- a/pkgs/by-name/ca/caligula/package.nix
+++ b/pkgs/by-name/ca/caligula/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
    };
 
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks; [
       Cocoa
       IOKit
diff --git a/pkgs/by-name/ca/caprine/package.nix b/pkgs/by-name/ca/caprine/package.nix
index e6e2106b3809..f164af42b5a8 100644
--- a/pkgs/by-name/ca/caprine/package.nix
+++ b/pkgs/by-name/ca/caprine/package.nix
@@ -40,7 +40,7 @@ buildNpmPackage rec {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/share/caprine
       cp -r dist/*-unpacked/{locales,resources{,.pak}} $out/share/caprine
 
@@ -53,7 +53,7 @@ buildNpmPackage rec {
       install -Dm644 build/icon.png $out/share/icons/hicolor/512x512/apps/caprine.png
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r dist/mac*/"Caprine.app" $out/Applications
       makeWrapper "$out/Applications/Caprine.app/Contents/MacOS/Caprine" $out/bin/caprine
diff --git a/pkgs/by-name/ca/cargo-bump/package.nix b/pkgs/by-name/ca/cargo-bump/package.nix
index 0de63ed2036b..e40d79a14089 100644
--- a/pkgs/by-name/ca/cargo-bump/package.nix
+++ b/pkgs/by-name/ca/cargo-bump/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/ca/cargo-geiger/package.nix b/pkgs/by-name/ca/cargo-geiger/package.nix
index acfc59829eea..c29825cb86b5 100644
--- a/pkgs/by-name/ca/cargo-geiger/package.nix
+++ b/pkgs/by-name/ca/cargo-geiger/package.nix
@@ -33,10 +33,10 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation Security libiconv curl ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation Security libiconv curl ]);
   nativeBuildInputs = [ pkg-config ]
     # curl-sys wants to run curl-config on darwin
-    ++ lib.optionals stdenv.isDarwin [ curl.dev ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ curl.dev ];
 
   # skip tests with networking or other failures
   checkFlags = [
diff --git a/pkgs/by-name/ca/cargo-i18n/package.nix b/pkgs/by-name/ca/cargo-i18n/package.nix
index 43b353ed4d49..0665e8860b84 100644
--- a/pkgs/by-name/ca/cargo-i18n/package.nix
+++ b/pkgs/by-name/ca/cargo-i18n/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-vN62QmCuhu7AjL6xSpBU6/ul4WgNLZbjWDCFyHj6rIM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/ca/cargo-information/package.nix b/pkgs/by-name/ca/cargo-information/package.nix
index dcb87ba96748..fe7f950fce85 100644
--- a/pkgs/by-name/ca/cargo-information/package.nix
+++ b/pkgs/by-name/ca/cargo-information/package.nix
@@ -45,7 +45,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     curl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/ca/cargo-make/package.nix b/pkgs/by-name/ca/cargo-make/package.nix
index 4a90d4af78b5..b55621333838 100644
--- a/pkgs/by-name/ca/cargo-make/package.nix
+++ b/pkgs/by-name/ca/cargo-make/package.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     bzip2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/ca/cargo-raze/package.nix b/pkgs/by-name/ca/cargo-raze/package.nix
index a0b4fd0ace7b..ca381ef562dd 100644
--- a/pkgs/by-name/ca/cargo-raze/package.nix
+++ b/pkgs/by-name/ca/cargo-raze/package.nix
@@ -36,9 +36,9 @@ rustPlatform.buildRustPackage {
     libgit2
     openssl
     curl
-  ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Darwin issue: Os { code: 24, kind: Uncategorized, message: "Too many open files" }
     # https://github.com/google/cargo-raze/issues/544
     ulimit -n 1024
diff --git a/pkgs/by-name/ca/cargo-rdme/package.nix b/pkgs/by-name/ca/cargo-rdme/package.nix
index 131a6eb70f45..105104e9b46d 100644
--- a/pkgs/by-name/ca/cargo-rdme/package.nix
+++ b/pkgs/by-name/ca/cargo-rdme/package.nix
@@ -9,7 +9,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-AARkXr6qOq9u/nmcmCnA4P+Q+MPPChCXoRaYiLwCNPs=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/by-name/ca/cargo-unfmt/package.nix b/pkgs/by-name/ca/cargo-unfmt/package.nix
index 3a2a16dfaaf6..e53cc07c330c 100644
--- a/pkgs/by-name/ca/cargo-unfmt/package.nix
+++ b/pkgs/by-name/ca/cargo-unfmt/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-mMeHTYCUIZR3jVvTxfyH4I9wGfUdCWcyn9djnksAY8k=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   # Doc tests are broken on 0.3.3
   doCheck = false;
diff --git a/pkgs/by-name/ca/cargo-vibe/package.nix b/pkgs/by-name/ca/cargo-vibe/package.nix
index 4caaa823264b..ba7a5882b5bb 100644
--- a/pkgs/by-name/ca/cargo-vibe/package.nix
+++ b/pkgs/by-name/ca/cargo-vibe/package.nix
@@ -28,8 +28,8 @@ rustPlatform.buildRustPackage rec {
     dbus
     openssl
   ]
-  ++ lib.optional stdenv.isLinux udev
-  ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit IOKit CoreBluetooth ]);
+  ++ lib.optional stdenv.hostPlatform.isLinux udev
+  ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit IOKit CoreBluetooth ]);
 
   meta = with lib; {
     description = "Cargo x Buttplug.io";
diff --git a/pkgs/by-name/ca/cargo-wasi/package.nix b/pkgs/by-name/ca/cargo-wasi/package.nix
index b0fe56c9fb69..a42b98da2054 100644
--- a/pkgs/by-name/ca/cargo-wasi/package.nix
+++ b/pkgs/by-name/ca/cargo-wasi/package.nix
@@ -21,8 +21,8 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security ]);
 
   # Checks need to be disabled here because the current test suite makes assumptions
   # about the surrounding environment that aren't Nix friendly. See these lines for specifics:
diff --git a/pkgs/by-name/ca/cargo-xwin/package.nix b/pkgs/by-name/ca/cargo-xwin/package.nix
index 78c6c9933e83..4f3b16c4ddee 100644
--- a/pkgs/by-name/ca/cargo-xwin/package.nix
+++ b/pkgs/by-name/ca/cargo-xwin/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-xVG1nET020rfMIjhIcCtNr9ZCj8SgQAvXePjyKSPjUs=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/ca/casadi/package.nix b/pkgs/by-name/ca/casadi/package.nix
index dda1eed048d0..0f1f3e3d7a00 100644
--- a/pkgs/by-name/ca/casadi/package.nix
+++ b/pkgs/by-name/ca/casadi/package.nix
@@ -97,7 +97,7 @@ stdenv.mkDerivation (finalAttrs: {
         "if (SWIG_IMPORT)" \
         "if (NOT SWIG_IMPORT)"
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # this is only printing stuff, and is not defined on all CPU
       substituteInPlace casadi/interfaces/hpipm/hpipm_runtime.hpp --replace-fail \
         "d_print_exp_tran_mat" \
@@ -150,7 +150,7 @@ stdenv.mkDerivation (finalAttrs: {
       python3Packages.numpy
       python3Packages.python
     ]
-    ++ lib.optionals stdenv.isDarwin [ llvmPackages_17.openmp ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages_17.openmp ];
 
   cmakeFlags = [
     (lib.cmakeBool "WITH_PYTHON" pythonSupport)
diff --git a/pkgs/by-name/ca/castxml/package.nix b/pkgs/by-name/ca/castxml/package.nix
index 88cbbec87c6d..c0fe17a1d097 100644
--- a/pkgs/by-name/ca/castxml/package.nix
+++ b/pkgs/by-name/ca/castxml/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     libxml2
     llvm
     zlib
-  ] ++ lib.optionals (!stdenv.isDarwin) [ libclang ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ libclang ];
 
   cmakeFlags =
     [
@@ -47,7 +47,7 @@ stdenv.mkDerivation (finalAttrs: {
       (lib.cmakeBool "SPHINX_HTML" withHTML)
       (lib.cmakeBool "SPHINX_MAN" withManual)
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       (lib.cmakeOptionType "path" "Clang_DIR" "${lib.getDev libclang}/lib/cmake/clang")
     ];
 
diff --git a/pkgs/by-name/cb/cbftp/package.nix b/pkgs/by-name/cb/cbftp/package.nix
index 5709acb02ddb..73e11f27b277 100644
--- a/pkgs/by-name/cb/cbftp/package.nix
+++ b/pkgs/by-name/cb/cbftp/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   dontConfigure = true;
 
-  makeFlags = lib.optional stdenv.isDarwin "OPTFLAGS=-O0";
+  makeFlags = lib.optional stdenv.hostPlatform.isDarwin "OPTFLAGS=-O0";
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/by-name/cc/ccache/package.nix b/pkgs/by-name/cc/ccache/package.nix
index 9984771b7ce9..c30543cdbdd1 100644
--- a/pkgs/by-name/cc/ccache/package.nix
+++ b/pkgs/by-name/cc/ccache/package.nix
@@ -83,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
     # test/run requires the compgen function which is available in
     # bashInteractive, but not bash.
     bashInteractive
-  ] ++ lib.optional stdenv.isDarwin xcodebuild;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin xcodebuild;
 
   checkInputs = [
     doctest
@@ -95,7 +95,7 @@ stdenv.mkDerivation (finalAttrs: {
         [
           "test.trim_dir" # flaky on hydra (possibly filesystem-specific?)
         ]
-        ++ lib.optionals stdenv.isDarwin [
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [
           "test.basedir"
           "test.fileclone" # flaky on hydra (possibly filesystem-specific?)
           "test.multi_arch"
diff --git a/pkgs/by-name/cc/cctools/package.nix b/pkgs/by-name/cc/cctools/package.nix
index 2ab074def674..c56f79b69e47 100644
--- a/pkgs/by-name/cc/cctools/package.nix
+++ b/pkgs/by-name/cc/cctools/package.nix
@@ -132,8 +132,8 @@ stdenv.mkDerivation (finalAttrs: {
       ld64
       llvm
     ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.objc4 ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ memstreamHook ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.objc4 ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ memstreamHook ];
 
   mesonBuildType = "release";
 
diff --git a/pkgs/by-name/ce/centerpiece/package.nix b/pkgs/by-name/ce/centerpiece/package.nix
index 784945da7c77..7d7c7512d876 100644
--- a/pkgs/by-name/ce/centerpiece/package.nix
+++ b/pkgs/by-name/ce/centerpiece/package.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
     libXrandr
   ]);
 
-  postFixup = lib.optional stdenv.isLinux ''
+  postFixup = lib.optional stdenv.hostPlatform.isLinux ''
     rpath=$(patchelf --print-rpath $out/bin/centerpiece)
     patchelf --set-rpath "$rpath:${
       lib.makeLibraryPath [
diff --git a/pkgs/by-name/ch/chatd/package.nix b/pkgs/by-name/ch/chatd/package.nix
index 692e7d752971..1653b80e26f7 100644
--- a/pkgs/by-name/ch/chatd/package.nix
+++ b/pkgs/by-name/ch/chatd/package.nix
@@ -67,15 +67,15 @@ buildNpmPackage rec {
     find $out/share/chatd/node_modules -name '*.exe' -or -name '*.dll' -or -name '*.pdb' -delete
     rm -rf ${
       lib.concatStringsSep " " (
-        (lib.optional (!stdenv.isx86_64) "$out/share/chatd/node_modules/onnxruntime-node/bin/napi-v3/*/x64")
+        (lib.optional (!stdenv.hostPlatform.isx86_64) "$out/share/chatd/node_modules/onnxruntime-node/bin/napi-v3/*/x64")
         ++ (lib.optional (
-          !stdenv.isAarch64
+          !stdenv.hostPlatform.isAarch64
         ) "$out/share/chatd/node_modules/onnxruntime-node/bin/napi-v3/*/arm64")
         ++ (lib.optional (
-          !stdenv.isDarwin
+          !stdenv.hostPlatform.isDarwin
         ) "$out/share/chatd/node_modules/onnxruntime-node/bin/napi-v3/darwin")
         ++ (lib.optional (
-          !stdenv.isLinux
+          !stdenv.hostPlatform.isLinux
         ) "$out/share/chatd/node_modules/onnxruntime-node/bin/napi-v3/linux")
       )
     }
diff --git a/pkgs/by-name/ch/chawan/package.nix b/pkgs/by-name/ch/chawan/package.nix
index 7a847adb1b44..d6ffc1d3dcd2 100644
--- a/pkgs/by-name/ch/chawan/package.nix
+++ b/pkgs/by-name/ch/chawan/package.nix
@@ -79,6 +79,6 @@ stdenv.mkDerivation {
     platforms = lib.platforms.unix;
     maintainers = with lib.maintainers; [ jtbx ];
     mainProgram = "cha";
-    broken = stdenv.isDarwin; # pending PR #292043
+    broken = stdenv.hostPlatform.isDarwin; # pending PR #292043
   };
 }
diff --git a/pkgs/by-name/ch/chow-tape-model/package.nix b/pkgs/by-name/ch/chow-tape-model/package.nix
index a233e2352d7f..e080ee6c05b8 100644
--- a/pkgs/by-name/ch/chow-tape-model/package.nix
+++ b/pkgs/by-name/ch/chow-tape-model/package.nix
@@ -126,7 +126,7 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = platforms.linux;
     # error: 'vvtanh' was not declared in this scope; did you mean 'tanh'?
     # error: no matching function for call to 'juce::dsp::SIMDRegister<double>::SIMDRegister(xsimd::simd_batch_traits<xsimd::batch<double, 2> >::batch_bool_type)'
-    broken = stdenv.isAarch64; # since 2021-12-27 on hydra (update to 2.10): https://hydra.nixos.org/build/162558991
+    broken = stdenv.hostPlatform.isAarch64; # since 2021-12-27 on hydra (update to 2.10): https://hydra.nixos.org/build/162558991
     mainProgram = "CHOWTapeModel";
   };
 })
diff --git a/pkgs/by-name/ci/cinny-unwrapped/package.nix b/pkgs/by-name/ci/cinny-unwrapped/package.nix
index fabda88152a4..643b7017deb6 100644
--- a/pkgs/by-name/ci/cinny-unwrapped/package.nix
+++ b/pkgs/by-name/ci/cinny-unwrapped/package.nix
@@ -27,7 +27,7 @@ buildNpmPackage rec {
 
   # Fix error: no member named 'aligned_alloc' in the global namespace
   env.NIX_CFLAGS_COMPILE = lib.optionalString (
-    stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0"
+    stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0"
   ) "-D_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION=1";
 
   nativeBuildInputs = [
@@ -39,7 +39,7 @@ buildNpmPackage rec {
     pixman
     cairo
     pango
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreText ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreText ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/by-name/cl/clickable/package.nix b/pkgs/by-name/cl/clickable/package.nix
index 53ef6c2dd4b0..0437aae99580 100644
--- a/pkgs/by-name/cl/clickable/package.nix
+++ b/pkgs/by-name/cl/clickable/package.nix
@@ -67,7 +67,7 @@ python3Packages.buildPythonApplication rec {
     ++
     # There are no docker images available for the aarch64 architecutre
     # which are required for tests.
-    lib.optionals stdenv.isAarch64 [
+    lib.optionals stdenv.hostPlatform.isAarch64 [
       "test_arch"
       "test_restricted_arch"
     ];
diff --git a/pkgs/by-name/cl/clipcat/package.nix b/pkgs/by-name/cl/clipcat/package.nix
index 6c5bd77c89db..b5d22c8b5081 100644
--- a/pkgs/by-name/cl/clipcat/package.nix
+++ b/pkgs/by-name/cl/clipcat/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-z2t7kq2ogMHJGF7xQnzc11B42gUZFTVokVkbw35CeY0=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/cl/cloudlogoffline/package.nix b/pkgs/by-name/cl/cloudlogoffline/package.nix
index 04e6f0ed2c32..027e91d5eb3a 100644
--- a/pkgs/by-name/cl/cloudlogoffline/package.nix
+++ b/pkgs/by-name/cl/cloudlogoffline/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (self: {
     qt6.qmake
     qt6.wrapQtAppsHook
   ]
-  ++ lib.optionals (!stdenv.isDarwin) [
+  ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     copyDesktopItems
   ];
 
@@ -33,16 +33,16 @@ stdenv.mkDerivation (self: {
   ];
 
   postPatch = let
-    targetDir = if stdenv.isDarwin then "Applications" else "bin";
+    targetDir = if stdenv.hostPlatform.isDarwin then "Applications" else "bin";
   in ''
     substituteInPlace CloudLogOffline.pro \
       --replace 'target.path = /opt/$''${TARGET}/bin' "target.path = $out/${targetDir}"
   '';
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     install -d $out/share/pixmaps
     install -m644 images/logo_circle.svg $out/share/pixmaps/cloudlogoffline.svg
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # FIXME: For some reason, the Info.plist isn't copied correctly to
     # the application bundle when building normally, instead creating an
     # empty file. This doesn't happen when building in a dev shell with
@@ -53,7 +53,7 @@ stdenv.mkDerivation (self: {
     install -m644 macos/Info.plist $out/Applications/CloudLogOffline.app/Contents/Info.plist
   '';
 
-  desktopItems = lib.optionals (!stdenv.isDarwin) [
+  desktopItems = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     (makeDesktopItem {
       name = "cloudlogoffline";
       desktopName = "CloudLogOffline";
diff --git a/pkgs/by-name/cm/cmake/package.nix b/pkgs/by-name/cm/cmake/package.nix
index ca0f1789a110..82563e56c2b0 100644
--- a/pkgs/by-name/cm/cmake/package.nix
+++ b/pkgs/by-name/cm/cmake/package.nix
@@ -25,7 +25,7 @@
     isBootstrap
   else false)
 , useOpenSSL ? !isMinimalBuild
-, useSharedLibraries ? (!isMinimalBuild && !stdenv.isCygwin)
+, useSharedLibraries ? (!isMinimalBuild && !stdenv.hostPlatform.isCygwin)
 , uiToolkits ? [] # can contain "ncurses" and/or "qt5"
 , buildDocs ? !(isMinimalBuild || (uiToolkits == []))
 , darwin
@@ -66,13 +66,13 @@ stdenv.mkDerivation (finalAttrs: {
     # Derived from https://github.com/libuv/libuv/commit/1a5d4f08238dd532c3718e210078de1186a5920d
     ./003-libuv-application-services.diff
   ]
-  ++ lib.optional stdenv.isCygwin ./004-cygwin.diff
+  ++ lib.optional stdenv.hostPlatform.isCygwin ./004-cygwin.diff
   # Derived from https://github.com/curl/curl/commit/31f631a142d855f069242f3e0c643beec25d1b51
-  ++ lib.optional (stdenv.isDarwin && isMinimalBuild) ./005-remove-systemconfiguration-dep.diff
+  ++ lib.optional (stdenv.hostPlatform.isDarwin && isMinimalBuild) ./005-remove-systemconfiguration-dep.diff
   # On Darwin, always set CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG.
-  ++ lib.optional stdenv.isDarwin ./006-darwin-always-set-runtime-c-flag.diff
+  ++ lib.optional stdenv.hostPlatform.isDarwin ./006-darwin-always-set-runtime-c-flag.diff
   # On platforms where ps is not part of stdenv, patch the invocation of ps to use an absolute path.
-  ++ lib.optional (stdenv.isDarwin || stdenv.isFreeBSD) (
+  ++ lib.optional (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isFreeBSD) (
     substituteAll {
       src = ./007-darwin-bsd-ps-abspath.diff;
       ps = lib.getExe ps;
@@ -108,8 +108,8 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optional useOpenSSL openssl
   ++ lib.optional cursesUI ncurses
   ++ lib.optional qt5UI qtbase
-  ++ lib.optional stdenv.isDarwin CoreServices
-  ++ lib.optional (stdenv.isDarwin && !isMinimalBuild) SystemConfiguration;
+  ++ lib.optional stdenv.hostPlatform.isDarwin CoreServices
+  ++ lib.optional (stdenv.hostPlatform.isDarwin && !isMinimalBuild) SystemConfiguration;
 
   preConfigure = ''
     fixCmakeFiles .
@@ -207,6 +207,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ ttuegel lnl7 AndersonTorres ];
     platforms = lib.platforms.all;
     mainProgram = "cmake";
-    broken = (qt5UI && stdenv.isDarwin);
+    broken = (qt5UI && stdenv.hostPlatform.isDarwin);
   };
 })
diff --git a/pkgs/by-name/co/code2prompt/package.nix b/pkgs/by-name/co/code2prompt/package.nix
index f951b2b1e294..03c5e6e7b0a8 100644
--- a/pkgs/by-name/co/code2prompt/package.nix
+++ b/pkgs/by-name/co/code2prompt/package.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.AppKit
     ];
diff --git a/pkgs/by-name/co/codeberg-cli/package.nix b/pkgs/by-name/co/codeberg-cli/package.nix
index 825731d4d1b4..2d89eaed9189 100644
--- a/pkgs/by-name/co/codeberg-cli/package.nix
+++ b/pkgs/by-name/co/codeberg-cli/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       let
         d = darwin.apple_sdk.frameworks;
       in
diff --git a/pkgs/by-name/co/codeium/package.nix b/pkgs/by-name/co/codeium/package.nix
index 679050b5cc8a..1807519b2202 100644
--- a/pkgs/by-name/co/codeium/package.nix
+++ b/pkgs/by-name/co/codeium/package.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     inherit hash;
   };
 
-  nativeBuildInputs = [ gzip ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = [ gzip ] ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   dontUnpack = true;
   dontConfigure = true;
diff --git a/pkgs/by-name/co/comet-gog/package.nix b/pkgs/by-name/co/comet-gog/package.nix
index 35677d4bf08d..f60193005705 100644
--- a/pkgs/by-name/co/comet-gog/package.nix
+++ b/pkgs/by-name/co/comet-gog/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
 
   env.PROTOC = lib.getExe' protobuf "protoc";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     SystemConfiguration
   ];
diff --git a/pkgs/by-name/co/committed/package.nix b/pkgs/by-name/co/committed/package.nix
index cd42172fde9f..229414b14f68 100644
--- a/pkgs/by-name/co/committed/package.nix
+++ b/pkgs/by-name/co/committed/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage {
   };
   cargoHash = "sha256-AmAEGVWq6KxLtiHDGIFVcoP1Wck8z+P9mnDy0SSSJNM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   passthru = {
     tests.version = testers.testVersion { package = committed; };
diff --git a/pkgs/by-name/co/conduwuit/package.nix b/pkgs/by-name/co/conduwuit/package.nix
index 1fd8e9b3e3d5..733b502246a0 100644
--- a/pkgs/by-name/co/conduwuit/package.nix
+++ b/pkgs/by-name/co/conduwuit/package.nix
@@ -14,17 +14,17 @@
   # upstream conduwuit enables jemalloc by default, so we follow suit
   enableJemalloc ? true,
   rust-jemalloc-sys,
-  enableLiburing ? stdenv.isLinux,
+  enableLiburing ? stdenv.hostPlatform.isLinux,
   liburing,
 }:
 let
   rust-jemalloc-sys' = rust-jemalloc-sys.override {
-    unprefixed = !stdenv.isDarwin;
+    unprefixed = !stdenv.hostPlatform.isDarwin;
   };
   rocksdb' = rocksdb.override {
     inherit enableLiburing;
     # rocksdb does not support prefixed jemalloc, which is required on darwin
-    enableJemalloc = enableJemalloc && !stdenv.isDarwin;
+    enableJemalloc = enableJemalloc && !stdenv.hostPlatform.isDarwin;
     jemalloc = rust-jemalloc-sys';
   };
 in
@@ -62,7 +62,7 @@ rustPlatform.buildRustPackage rec {
     ]
     ++ lib.optional enableJemalloc rust-jemalloc-sys'
     ++ lib.optional enableLiburing liburing
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
     ];
 
diff --git a/pkgs/by-name/co/construct/package.nix b/pkgs/by-name/co/construct/package.nix
index eb2c922b31b4..89833c817608 100644
--- a/pkgs/by-name/co/construct/package.nix
+++ b/pkgs/by-name/co/construct/package.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-ENso0y7yEaXzGXzZOnlZ1L7+j/qayJL+f55/NYLz2ew=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
         --replace g++ c++
   '';
diff --git a/pkgs/by-name/co/convco/package.nix b/pkgs/by-name/co/convco/package.nix
index 60b17d84c648..0f08aba98ae8 100644
--- a/pkgs/by-name/co/convco/package.nix
+++ b/pkgs/by-name/co/convco/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   meta = with lib; {
     description = "Conventional commit cli";
diff --git a/pkgs/by-name/co/convmv/package.nix b/pkgs/by-name/co/convmv/package.nix
index 65fbd85e37d6..e89b4250ead3 100644
--- a/pkgs/by-name/co/convmv/package.nix
+++ b/pkgs/by-name/co/convmv/package.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # testsuite.tar contains filenames that aren't valid UTF-8. Extraction of
   # testsuite.tar will fail as APFS enforces that filenames are valid UTF-8.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   prePatch =
     lib.optionalString finalAttrs.doCheck ''
diff --git a/pkgs/by-name/co/cook-cli/package.nix b/pkgs/by-name/co/cook-cli/package.nix
index fbebd0d7fb46..846d3fb52777 100644
--- a/pkgs/by-name/co/cook-cli/package.nix
+++ b/pkgs/by-name/co/cook-cli/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   postPatch = ''
     rm -rf "ui/public"
diff --git a/pkgs/by-name/co/costa/package.nix b/pkgs/by-name/co/costa/package.nix
index 3dacce655055..fcc644edadf4 100644
--- a/pkgs/by-name/co/costa/package.nix
+++ b/pkgs/by-name/co/costa/package.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = [ scalapack ] ++ lib.optional stdenv.isDarwin llvmPackages.openmp;
+  buildInputs = [ scalapack ] ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   propagatedBuildInputs = [ mpi ];
 
diff --git a/pkgs/by-name/co/coyim/package.nix b/pkgs/by-name/co/coyim/package.nix
index 458ee764f1df..b45522006890 100644
--- a/pkgs/by-name/co/coyim/package.nix
+++ b/pkgs/by-name/co/coyim/package.nix
@@ -34,6 +34,6 @@ buildGoModule {
     homepage = "https://coy.im/";
     license = lib.licenses.gpl3;
     platforms = [ "x86_64-linux" "x86_64-darwin" ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/cp/cppcheck/package.nix b/pkgs/by-name/cp/cppcheck/package.nix
index a7fbe2a50ec4..d7ed4fb99c47 100644
--- a/pkgs/by-name/cp/cppcheck/package.nix
+++ b/pkgs/by-name/cp/cppcheck/package.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
   strictDeps = true;
 
   # test/testcondition.cpp:4949(TestCondition::alwaysTrueContainer): Assertion failed.
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   doInstallCheck = true;
 
   postPatch = ''
diff --git a/pkgs/by-name/cp/cpuinfo/package.nix b/pkgs/by-name/cp/cpuinfo/package.nix
index 5ee3e361ef69..c57f6708b389 100644
--- a/pkgs/by-name/cp/cpuinfo/package.nix
+++ b/pkgs/by-name/cp/cpuinfo/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "USE_SYSTEM_LIBS" true)
   ];
 
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   meta = {
     description = "Tools and library to detect essential for performance optimization information about host CPU";
diff --git a/pkgs/by-name/cr/crabfit-api/package.nix b/pkgs/by-name/cr/crabfit-api/package.nix
index c3d396a03581..eb1eda130e5b 100644
--- a/pkgs/by-name/cr/crabfit-api/package.nix
+++ b/pkgs/by-name/cr/crabfit-api/package.nix
@@ -58,7 +58,7 @@ rustPlatform.buildRustPackage rec {
       openssl
       sqlite
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/cr/cronutils/package.nix b/pkgs/by-name/cr/cronutils/package.nix
index f1060ba2d2cb..8c2c3d5213a8 100644
--- a/pkgs/by-name/cr/cronutils/package.nix
+++ b/pkgs/by-name/cr/cronutils/package.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   makeFlags = [ "prefix=$(out)" ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     "-D_DARWIN_C_SOURCE"
     # runstat.c:81:81: error: format string is not a string literal
     "-Wno-format-nonliteral"
diff --git a/pkgs/by-name/cr/crunchy-cli/package.nix b/pkgs/by-name/cr/crunchy-cli/package.nix
index 4a5e9236ef9b..21a8a5b8cb34 100644
--- a/pkgs/by-name/cr/crunchy-cli/package.nix
+++ b/pkgs/by-name/cr/crunchy-cli/package.nix
@@ -26,13 +26,13 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/cy/cyme/package.nix b/pkgs/by-name/cy/cyme/package.nix
index d0ed49b7b267..401b175b463a 100644
--- a/pkgs/by-name/cy/cyme/package.nix
+++ b/pkgs/by-name/cy/cyme/package.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.DarwinTools
   ];
 
@@ -37,7 +37,7 @@ rustPlatform.buildRustPackage rec {
   checkFlags = [
     # doctest that requires access outside sandbox
     "--skip=udev::hwdb::get"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # system_profiler is not available in the sandbox
     "--skip=test_run"
   ];
diff --git a/pkgs/by-name/cz/czkawka/package.nix b/pkgs/by-name/cz/czkawka/package.nix
index 6e8cf21d298a..934b6d1dcafa 100644
--- a/pkgs/by-name/cz/czkawka/package.nix
+++ b/pkgs/by-name/cz/czkawka/package.nix
@@ -21,7 +21,7 @@
 
 let
   buildRustPackage' = rustPlatform.buildRustPackage.override {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   self = buildRustPackage' {
diff --git a/pkgs/by-name/da/darklua/package.nix b/pkgs/by-name/da/darklua/package.nix
index aa79d6048dd9..bf8576961b8b 100644
--- a/pkgs/by-name/da/darklua/package.nix
+++ b/pkgs/by-name/da/darklua/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-fYx+SQdQMnNSygr0/Y4zEPtqfQPZYmQUq3ndi1HlXuE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
 
   # error: linker `aarch64-linux-gnu-gcc` not found
   postPatch = ''
diff --git a/pkgs/by-name/da/darktable/package.nix b/pkgs/by-name/da/darktable/package.nix
index 5ccb4d1b63dc..e3a32dba4658 100644
--- a/pkgs/by-name/da/darktable/package.nix
+++ b/pkgs/by-name/da/darktable/package.nix
@@ -106,17 +106,17 @@ stdenv.mkDerivation rec {
     libaom
     portmidi
     lua
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     colord
     colord-gtk
     libX11
     ocl-icd
-  ] ++ lib.optional stdenv.isDarwin gtk-mac-integration
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin gtk-mac-integration
   ++ lib.optional stdenv.cc.isClang llvmPackages.openmp;
 
   cmakeFlags = [
     "-DBUILD_USERMANUAL=False"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DUSE_COLORD=OFF"
     "-DUSE_KWALLET=OFF"
   ];
@@ -127,8 +127,8 @@ stdenv.mkDerivation rec {
   # the wrappers:
   preFixup =
     let
-      libPathEnvVar = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
-      libPathPrefix = "$out/lib/darktable" + lib.optionalString stdenv.isLinux ":${ocl-icd}/lib";
+      libPathEnvVar = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+      libPathPrefix = "$out/lib/darktable" + lib.optionalString stdenv.hostPlatform.isLinux ":${ocl-icd}/lib";
     in
     ''
       for f in $out/share/darktable/kernels/*.cl; do
diff --git a/pkgs/by-name/da/darling-dmg/package.nix b/pkgs/by-name/da/darling-dmg/package.nix
index 4fca75a45bc8..3053982a6476 100644
--- a/pkgs/by-name/da/darling-dmg/package.nix
+++ b/pkgs/by-name/da/darling-dmg/package.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ fuse openssl zlib bzip2 libxml2 icu lzfse ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   CXXFLAGS = [
     "-DCOMPILE_WITH_LZFSE=1"
diff --git a/pkgs/by-name/db/dbd/package.nix b/pkgs/by-name/db/dbd/package.nix
index 20658b4d716d..1df459cb3267 100644
--- a/pkgs/by-name/db/dbd/package.nix
+++ b/pkgs/by-name/db/dbd/package.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   makeFlags = [
     "PREFIX=${placeholder "out"}"
     "CC=${stdenv.cc.targetPrefix}cc"
-  ] ++ lib.optionals stdenv.isDarwin [ "darwin" ] ++ lib.optionals (stdenv.hostPlatform.isUnix && !stdenv.isDarwin) [ "unix" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "darwin" ] ++ lib.optionals (stdenv.hostPlatform.isUnix && !stdenv.hostPlatform.isDarwin) [ "unix" ];
 
   meta = with lib; {
     description = "Netcat-clone, designed to be portable and offer strong encryption";
diff --git a/pkgs/by-name/db/dbeaver-bin/package.nix b/pkgs/by-name/db/dbeaver-bin/package.nix
index a8d3dbf0969f..9b5bf26200fb 100644
--- a/pkgs/by-name/db/dbeaver-bin/package.nix
+++ b/pkgs/by-name/db/dbeaver-bin/package.nix
@@ -41,22 +41,22 @@ stdenvNoCC.mkDerivation (finalAttrs: {
       inherit hash;
     };
 
-  sourceRoot = lib.optional stdenvNoCC.isDarwin "dbeaver.app";
+  sourceRoot = lib.optional stdenvNoCC.hostPlatform.isDarwin "dbeaver.app";
 
   nativeBuildInputs =
     [ makeWrapper ]
-    ++ lib.optionals (!stdenvNoCC.isDarwin) [
+    ++ lib.optionals (!stdenvNoCC.hostPlatform.isDarwin) [
       gnused
       wrapGAppsHook3
       autoPatchelfHook
     ]
-    ++ lib.optionals stdenvNoCC.isDarwin [ undmg ];
+    ++ lib.optionals stdenvNoCC.hostPlatform.isDarwin [ undmg ];
 
   dontConfigure = true;
   dontBuild = true;
 
   installPhase =
-    if !stdenvNoCC.isDarwin then
+    if !stdenvNoCC.hostPlatform.isDarwin then
       ''
         runHook preInstall
 
diff --git a/pkgs/by-name/db/dbgate/package.nix b/pkgs/by-name/db/dbgate/package.nix
index ab62dee5f391..58c88b65c0fe 100644
--- a/pkgs/by-name/db/dbgate/package.nix
+++ b/pkgs/by-name/db/dbgate/package.nix
@@ -40,7 +40,7 @@ let
     sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
   };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation {
     inherit
       pname
diff --git a/pkgs/by-name/db/dbqn/package.nix b/pkgs/by-name/db/dbqn/package.nix
index 832148c928b0..7ec4dea05342 100644
--- a/pkgs/by-name/db/dbqn/package.nix
+++ b/pkgs/by-name/db/dbqn/package.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ AndersonTorres sternenseemann ];
     inherit (jdk.meta) platforms;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dbqn-native.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dbqn-native.x86_64-darwin
   };
 }
 # TODO: Processing app
diff --git a/pkgs/by-name/de/debase/package.nix b/pkgs/by-name/de/debase/package.nix
index d204f161d09b..a2761056f116 100644
--- a/pkgs/by-name/de/debase/package.nix
+++ b/pkgs/by-name/de/debase/package.nix
@@ -53,11 +53,11 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     libgit2
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk_11_0.frameworks.Foundation ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk_11_0.frameworks.Foundation ];
 
   installPhase = ''
     runHook preInstall
-    install -Dm755 build-${if stdenv.isDarwin then "mac" else "linux"}/release/debase $out/bin/debase
+    install -Dm755 build-${if stdenv.hostPlatform.isDarwin then "mac" else "linux"}/release/debase $out/bin/debase
     runHook postInstall
   '';
 
@@ -65,9 +65,9 @@ stdenv.mkDerivation rec {
 
   makeFlags = [
     "ARCHS=${
-      if stdenv.isx86_64 then
+      if stdenv.hostPlatform.isx86_64 then
         "x86_64"
-      else if stdenv.isAarch64 then
+      else if stdenv.hostPlatform.isAarch64 then
         "arm64"
       else
         abort "unsupported system: ${stdenv.system}"
diff --git a/pkgs/by-name/de/deltachat-desktop/package.nix b/pkgs/by-name/de/deltachat-desktop/package.nix
index dd647ef0ebf2..78f7c75d4e03 100644
--- a/pkgs/by-name/de/deltachat-desktop/package.nix
+++ b/pkgs/by-name/de/deltachat-desktop/package.nix
@@ -53,13 +53,13 @@ buildNpmPackage rec {
     makeWrapper
     pkg-config
     python3
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     copyDesktopItems
   ];
 
   buildInputs = [
     deltachat-rpc-server
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/by-name/de/deploy-rs/package.nix b/pkgs/by-name/de/deploy-rs/package.nix
index 9830785e6a30..a4b85ff3dce9 100644
--- a/pkgs/by-name/de/deploy-rs/package.nix
+++ b/pkgs/by-name/de/deploy-rs/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-lsW810bktMzHZIbuN3pz9N+IUcjNtE5J2AuB/G6pGWI=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/de/devenv/package.nix b/pkgs/by-name/de/devenv/package.nix
index 29c8333e4117..f940c8390f7b 100644
--- a/pkgs/by-name/de/devenv/package.nix
+++ b/pkgs/by-name/de/devenv/package.nix
@@ -45,7 +45,7 @@ in rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ makeWrapper pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/de/dezoomify-rs/package.nix b/pkgs/by-name/de/dezoomify-rs/package.nix
index c639c99b1b64..2443c1aa6adb 100644
--- a/pkgs/by-name/de/dezoomify-rs/package.nix
+++ b/pkgs/by-name/de/dezoomify-rs/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-K9LNommagWjVxOXq6YUE4eg/3zpj3+MR5BugGCcVUlA=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks;
     [
       SystemConfiguration
diff --git a/pkgs/by-name/di/dialog/package.nix b/pkgs/by-name/di/dialog/package.nix
index 23f75bb1c994..9ef364729933 100644
--- a/pkgs/by-name/di/dialog/package.nix
+++ b/pkgs/by-name/di/dialog/package.nix
@@ -3,7 +3,7 @@
 , fetchurl
 , libtool
 , ncurses
-, enableShared ? !stdenv.isDarwin && !stdenv.hostPlatform.isStatic
+, enableShared ? !stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isStatic
 , unicodeSupport ? true
 , withLibrary ? true
 }:
diff --git a/pkgs/by-name/di/diesel-cli/package.nix b/pkgs/by-name/di/diesel-cli/package.nix
index 6dc17f197d2b..04f610061599 100644
--- a/pkgs/by-name/di/diesel-cli/package.nix
+++ b/pkgs/by-name/di/diesel-cli/package.nix
@@ -44,8 +44,8 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security
-    ++ lib.optional (stdenv.isDarwin && mysqlSupport) libiconv
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && mysqlSupport) libiconv
     ++ lib.optional sqliteSupport sqlite
     ++ lib.optional postgresqlSupport postgresql
     ++ lib.optionals mysqlSupport [
diff --git a/pkgs/by-name/di/dim/package.nix b/pkgs/by-name/di/dim/package.nix
index f7fe86ab9a98..53ab3a0ed685 100644
--- a/pkgs/by-name/di/dim/package.nix
+++ b/pkgs/by-name/di/dim/package.nix
@@ -77,7 +77,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ sqlite ]
-    ++ lib.optional stdenv.isDarwin [
+    ++ lib.optional stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/di/disarchive/package.nix b/pkgs/by-name/di/disarchive/package.nix
index 9bc24e531552..8b908d40a659 100644
--- a/pkgs/by-name/di/disarchive/package.nix
+++ b/pkgs/by-name/di/disarchive/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     guile-lzma
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     guile-quickcheck
diff --git a/pkgs/by-name/di/discord-gamesdk/package.nix b/pkgs/by-name/di/discord-gamesdk/package.nix
index 7f38bfd45760..5d7a8185be45 100644
--- a/pkgs/by-name/di/discord-gamesdk/package.nix
+++ b/pkgs/by-name/di/discord-gamesdk/package.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ (stdenv.cc.cc.libgcc or null) ];
 
-  nativeBuildInputs = lib.optional stdenv.isLinux autoPatchelfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
 
   installPhase =
     let
diff --git a/pkgs/by-name/dm/dmd/generic.nix b/pkgs/by-name/dm/dmd/generic.nix
index 51c814832072..cf8cae7b4f5a 100644
--- a/pkgs/by-name/dm/dmd/generic.nix
+++ b/pkgs/by-name/dm/dmd/generic.nix
@@ -37,7 +37,7 @@ let
 
   bits = builtins.toString stdenv.hostPlatform.parsed.cpu.bits;
   osname =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       "osx"
     else
       stdenv.hostPlatform.parsed.kernel.name;
@@ -106,9 +106,9 @@ stdenv.mkDerivation (finalAttrs: {
     rm dmd/compiler/test/dshell/test6952.d
   '' + lib.optionalString (lib.versionAtLeast version "2.092.2") ''
     substituteInPlace dmd/compiler/test/dshell/test6952.d --replace-fail "/usr/bin/env bash" "${bash}/bin/bash"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace phobos/std/socket.d --replace-fail "assert(ih.addrList[0] == 0x7F_00_00_01);" ""
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace phobos/std/socket.d --replace-fail "foreach (name; names)" "names = []; foreach (name; names)"
   '';
 
@@ -123,7 +123,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     curl
     tzdata
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
   ];
 
@@ -224,6 +224,6 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" ];
     # ld: section __DATA/__thread_bss has type zero-fill but non-zero file offset file '/private/tmp/nix-build-dmd-2.109.1.drv-0/.rdmd-301/rdmd-build.d-A1CF043A7D87C5E88A58F3C0EF5A0DF7/objs/build.o' for architecture x86_64
     # clang-16: error: linker command failed with exit code 1 (use -v to see invocation)
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 })
diff --git a/pkgs/by-name/do/docfd/package.nix b/pkgs/by-name/do/docfd/package.nix
index 11ddaace86fe..e4828191c0c6 100644
--- a/pkgs/by-name/do/docfd/package.nix
+++ b/pkgs/by-name/do/docfd/package.nix
@@ -16,7 +16,7 @@
 let
   # Needed for x86_64-darwin
   buildDunePackage' = ocamlPackages.buildDunePackage.override {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 in
 buildDunePackage' rec {
diff --git a/pkgs/by-name/do/docuum/package.nix b/pkgs/by-name/do/docuum/package.nix
index 3eae913da1e1..68409ca05651 100644
--- a/pkgs/by-name/do/docuum/package.nix
+++ b/pkgs/by-name/do/docuum/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     "--skip=format::tests::code_str_display"
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.IOKit
   ];
 
diff --git a/pkgs/by-name/do/dogedns/package.nix b/pkgs/by-name/do/dogedns/package.nix
index 0c94a9506d2c..c6afe1ab7822 100644
--- a/pkgs/by-name/do/dogedns/package.nix
+++ b/pkgs/by-name/do/dogedns/package.nix
@@ -29,9 +29,9 @@ rustPlatform.buildRustPackage rec {
   ];
 
   nativeBuildInputs = [ installShellFiles pandoc ]
-    ++ lib.optionals stdenv.isLinux [ pkg-config ];
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
  postInstall = ''
     installShellCompletion completions/doge.{bash,fish,zsh}
diff --git a/pkgs/by-name/do/dosbox-staging/package.nix b/pkgs/by-name/do/dosbox-staging/package.nix
index f4cab21b1b30..d23466447ecc 100644
--- a/pkgs/by-name/do/dosbox-staging/package.nix
+++ b/pkgs/by-name/do/dosbox-staging/package.nix
@@ -80,8 +80,8 @@ stdenv.mkDerivation (finalAttrs: {
       speexdsp
       zlib-ng
     ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AudioUnit
diff --git a/pkgs/by-name/do/dotter/package.nix b/pkgs/by-name/do/dotter/package.nix
index 441fbf6cc4e8..e2897b83a348 100644
--- a/pkgs/by-name/do/dotter/package.nix
+++ b/pkgs/by-name/do/dotter/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-LEOORHD0j+HVl/fB9Q2xVZ2AxZKsPE5SeOS1ZsKwTSo=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
 
   nativeCheckInputs = [
     which
diff --git a/pkgs/by-name/ds/dssat/package.nix b/pkgs/by-name/ds/dssat/package.nix
index 7d57195dcde4..4b40302c415d 100644
--- a/pkgs/by-name/ds/dssat/package.nix
+++ b/pkgs/by-name/ds/dssat/package.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (final: {
     makeWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ glibc.static ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ glibc.static ];
 
   cmakeFlags = [ "-DCMAKE_INSTALL_PREFIX=${placeholder "out"}/share/dssat/" ];
 
@@ -69,6 +69,6 @@ stdenv.mkDerivation (final: {
     license = lib.licenses.bsd3;
     maintainers = with lib.maintainers; [ pcboy ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isAarch64 && stdenv.isLinux;
+    broken = stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux;
   };
 })
diff --git a/pkgs/by-name/du/dub/package.nix b/pkgs/by-name/du/dub/package.nix
index 1416b06fc13f..c6782b49070e 100644
--- a/pkgs/by-name/du/dub/package.nix
+++ b/pkgs/by-name/du/dub/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postBuild
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/by-name/du/dublin-traceroute/package.nix b/pkgs/by-name/du/dublin-traceroute/package.nix
index 5e797cf97b57..0ec5ac87ef61 100644
--- a/pkgs/by-name/du/dublin-traceroute/package.nix
+++ b/pkgs/by-name/du/dublin-traceroute/package.nix
@@ -37,6 +37,6 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ baloo ];
     platforms = platforms.unix;
     mainProgram = "dublin-traceroute";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/du/dumbpipe/package.nix b/pkgs/by-name/du/dumbpipe/package.nix
index 9dc1e12cbac9..4e6bad9004c5 100644
--- a/pkgs/by-name/du/dumbpipe/package.nix
+++ b/pkgs/by-name/du/dumbpipe/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-rlhfGw/b0HnV1Xl9VWIqEuyM9pq29O6bpaawk2hnG+o=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks; [
       SystemConfiguration
     ]
diff --git a/pkgs/by-name/du/dummyhttp/package.nix b/pkgs/by-name/du/dummyhttp/package.nix
index 0676e970a81f..59ca3d3344a0 100644
--- a/pkgs/by-name/du/dummyhttp/package.nix
+++ b/pkgs/by-name/du/dummyhttp/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-bw0VlPHjNZkpLVJZrB3aaQGkwvQpkJGIn+hi0yn2M4s=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/du/dune3d/package.nix b/pkgs/by-name/du/dune3d/package.nix
index 122a9691c53b..b1e1863581b8 100644
--- a/pkgs/by-name/du/dune3d/package.nix
+++ b/pkgs/by-name/du/dune3d/package.nix
@@ -24,7 +24,7 @@
 }:
 
 let
-  stdenv' = if stdenv.isDarwin then llvmPackages_17.stdenv else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then llvmPackages_17.stdenv else stdenv;
   opencascade-occt = opencascade-occt_7_6;
 in
 stdenv'.mkDerivation (finalAttrs: {
@@ -45,7 +45,7 @@ stdenv'.mkDerivation (finalAttrs: {
     pkg-config
     wrapGAppsHook3
     libxml2 # for xmllints
-  ] ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     cmake
@@ -55,7 +55,7 @@ stdenv'.mkDerivation (finalAttrs: {
     libepoxy
     librsvg
     libspnav
-    (if stdenv.isLinux then libuuid else libossp_uuid)
+    (if stdenv.hostPlatform.isLinux then libuuid else libossp_uuid)
     opencascade-occt
     (python3.withPackages (pp: [
       pp.pygobject3
diff --git a/pkgs/by-name/du/dust/package.nix b/pkgs/by-name/du/dust/package.nix
index cf13173519ac..53b095574898 100644
--- a/pkgs/by-name/du/dust/package.nix
+++ b/pkgs/by-name/du/dust/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   doCheck = false;
 
diff --git a/pkgs/by-name/dx/dxvk/package.nix b/pkgs/by-name/dx/dxvk/package.nix
index 9a82a2a20b57..144bfe33609b 100644
--- a/pkgs/by-name/dx/dxvk/package.nix
+++ b/pkgs/by-name/dx/dxvk/package.nix
@@ -26,7 +26,7 @@ stdenvNoCC.mkDerivation (
     mingwW64Stdenv = useWin32ThreadModel pkgsCross.mingwW64.stdenv;
 
     dxvk32 =
-      if stdenvNoCC.isDarwin then
+      if stdenvNoCC.hostPlatform.isDarwin then
         pkgsCross.mingw32.dxvk_1.override {
           stdenv = mingw32Stdenv;
           enableMoltenVKCompat = true;
@@ -35,7 +35,7 @@ stdenvNoCC.mkDerivation (
         pkgsCross.mingw32.dxvk_2.override { stdenv = mingw32Stdenv; };
 
     dxvk64 =
-      if stdenvNoCC.isDarwin then
+      if stdenvNoCC.hostPlatform.isDarwin then
         pkgsCross.mingwW64.dxvk_1.override {
           stdenv = mingwW64Stdenv;
           enableMoltenVKCompat = true;
diff --git a/pkgs/by-name/ea/easytier/package.nix b/pkgs/by-name/ea/easytier/package.nix
index 9928fd07b0db..7deb797435f6 100644
--- a/pkgs/by-name/ea/easytier/package.nix
+++ b/pkgs/by-name/ea/easytier/package.nix
@@ -24,12 +24,12 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ protobuf ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
-  buildNoDefaultFeatures = stdenv.isMips;
-  buildFeatures = lib.optional stdenv.isMips "mips" ++ lib.optional withQuic "quic";
+  buildNoDefaultFeatures = stdenv.hostPlatform.isMips;
+  buildFeatures = lib.optional stdenv.hostPlatform.isMips "mips" ++ lib.optional withQuic "quic";
 
   doCheck = false; # tests failed due to heavy rely on network
 
diff --git a/pkgs/by-name/ed/edk2/package.nix b/pkgs/by-name/ed/edk2/package.nix
index 0f50c45e6487..b4919f27efb0 100644
--- a/pkgs/by-name/ed/edk2/package.nix
+++ b/pkgs/by-name/ed/edk2/package.nix
@@ -13,13 +13,13 @@
 let
   pythonEnv = buildPackages.python3.withPackages (ps: [ps.tkinter]);
 
-targetArch = if stdenv.isi686 then
+targetArch = if stdenv.hostPlatform.isi686 then
   "IA32"
-else if stdenv.isx86_64 then
+else if stdenv.hostPlatform.isx86_64 then
   "X64"
-else if stdenv.isAarch32 then
+else if stdenv.hostPlatform.isAarch32 then
   "ARM"
-else if stdenv.isAarch64 then
+else if stdenv.hostPlatform.isAarch64 then
   "AARCH64"
 else if stdenv.hostPlatform.isRiscV64 then
   "RISCV64"
@@ -28,7 +28,7 @@ else if stdenv.hostPlatform.isLoongArch64 then
 else
   throw "Unsupported architecture";
 
-buildType = if stdenv.isDarwin then
+buildType = if stdenv.hostPlatform.isDarwin then
     "CLANGPDB"
   else
     "GCC5";
@@ -108,7 +108,7 @@ edk2 = stdenv.mkDerivation {
 
   env.NIX_CFLAGS_COMPILE = "-Wno-return-type"
     + lib.optionalString (stdenv.cc.isGNU) " -Wno-error=stringop-truncation"
-    + lib.optionalString (stdenv.isDarwin) " -Wno-error=macro-redefined";
+    + lib.optionalString (stdenv.hostPlatform.isDarwin) " -Wno-error=macro-redefined";
 
   hardeningDisable = [ "format" "fortify" ];
 
diff --git a/pkgs/by-name/ek/ekho/package.nix b/pkgs/by-name/ek/ekho/package.nix
index 043908298266..818c113ba0c2 100644
--- a/pkgs/by-name/ek/ekho/package.nix
+++ b/pkgs/by-name/ek/ekho/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ pkg-config autoconf automake libtool ];
 
   buildInputs = [ libsndfile libpulseaudio espeak-ng sonic utf8cpp ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AudioUnit ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AudioUnit ];
 
   meta = with lib; {
     description = "Chinese text-to-speech software";
diff --git a/pkgs/by-name/en/en-croissant/package.nix b/pkgs/by-name/en/en-croissant/package.nix
index b21364ed9e46..72019cbcb9c9 100644
--- a/pkgs/by-name/en/en-croissant/package.nix
+++ b/pkgs/by-name/en/en-croissant/package.nix
@@ -21,7 +21,7 @@
 
 let
   buildRustPackage = rustPlatform.buildRustPackage.override {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 in
 buildRustPackage rec {
@@ -59,11 +59,11 @@ buildRustPackage rec {
       cargo-tauri
       pkg-config
     ]
-    ++ lib.optionals stdenv.isLinux [ wrapGAppsHook3 ]
-    ++ lib.optionals stdenv.isDarwin [ makeBinaryWrapper ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ wrapGAppsHook3 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ makeBinaryWrapper ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       openssl
       libsoup
       webkitgtk
@@ -72,7 +72,7 @@ buildRustPackage rec {
       gst_all_1.gst-plugins-bad
       gst_all_1.gst-plugins-good
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.Cocoa
       darwin.apple_sdk_11_0.frameworks.WebKit
     ];
@@ -82,7 +82,7 @@ buildRustPackage rec {
   buildPhase = ''
     runHook preBuild
 
-    cargo tauri build --bundles ${if stdenv.isDarwin then "app" else "deb"}
+    cargo tauri build --bundles ${if stdenv.hostPlatform.isDarwin then "app" else "deb"}
 
     runHook postBuild
   '';
@@ -93,12 +93,12 @@ buildRustPackage rec {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p "$out"/Applications
       cp -r src-tauri/target/release/bundle/macos/* "$out"/Applications
     ''}
 
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p "$out"
       cp -r src-tauri/target/release/bundle/deb/*/data/usr/* "$out"
     ''}
@@ -106,7 +106,7 @@ buildRustPackage rec {
     runHook postInstall
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     makeWrapper "$out"/Applications/en-croissant.app/Contents/MacOS/en-croissant $out/bin/en-croissant
   '';
 
diff --git a/pkgs/by-name/en/envio/package.nix b/pkgs/by-name/en/envio/package.nix
index 0424bcf4e9bd..b1037be41ac7 100644
--- a/pkgs/by-name/en/envio/package.nix
+++ b/pkgs/by-name/en/envio/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ libgpg-error gpgme ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   # Remove postPatch when updating to the next envio release
   # For details see https://github.com/envio-cli/envio/pull/31
diff --git a/pkgs/by-name/en/envoy/package.nix b/pkgs/by-name/en/envoy/package.nix
index 425184598af6..b6a0b7701410 100644
--- a/pkgs/by-name/en/envoy/package.nix
+++ b/pkgs/by-name/en/envoy/package.nix
@@ -172,7 +172,7 @@ buildBazelPackage {
 
       "--define=wasm=${wasmRuntime}"
     ]
-    ++ (lib.optionals stdenv.isAarch64 [
+    ++ (lib.optionals stdenv.hostPlatform.isAarch64 [
       # external/com_github_google_tcmalloc/tcmalloc/internal/percpu_tcmalloc.h:611:9: error: expected ':' or '::' before '[' token
       #   611 |       : [end_ptr] "=&r"(end_ptr), [cpu_id] "=&r"(cpu_id),
       #       |         ^
diff --git a/pkgs/by-name/ep/epoll-shim/package.nix b/pkgs/by-name/ep/epoll-shim/package.nix
index bbb49c8ec7c0..63deaaf9df9e 100644
--- a/pkgs/by-name/ep/epoll-shim/package.nix
+++ b/pkgs/by-name/ep/epoll-shim/package.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # https://github.com/jiixyj/epoll-shim/issues/41
   # https://github.com/jiixyj/epoll-shim/pull/34
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Small epoll implementation using kqueue";
diff --git a/pkgs/by-name/es/eslint/package.nix b/pkgs/by-name/es/eslint/package.nix
index b1e2732a2804..6ad9acd2afc0 100644
--- a/pkgs/by-name/es/eslint/package.nix
+++ b/pkgs/by-name/es/eslint/package.nix
@@ -7,7 +7,7 @@
 }:
 let
   buildNpmPackage' = buildNpmPackage.override {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 in
 buildNpmPackage' rec {
diff --git a/pkgs/by-name/es/espflash/package.nix b/pkgs/by-name/es/espflash/package.nix
index 2b6baaf48e9f..aad2b117ebb4 100644
--- a/pkgs/by-name/es/espflash/package.nix
+++ b/pkgs/by-name/es/espflash/package.nix
@@ -32,9 +32,9 @@ rustPlatform.buildRustPackage rec {
   # Needed to get openssl-sys to use pkg-config.
   OPENSSL_NO_VENDOR = 1;
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isLinux [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     udev
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     Security
     SystemConfiguration
diff --git a/pkgs/by-name/ev/evebox/package.nix b/pkgs/by-name/ev/evebox/package.nix
index 29062726c15e..4b09fba8675b 100644
--- a/pkgs/by-name/ev/evebox/package.nix
+++ b/pkgs/by-name/ev/evebox/package.nix
@@ -28,6 +28,6 @@ rustPlatform.buildRustPackage rec {
     changelog = "https://github.com/jasonish/evebox/releases/tag/${src.rev}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ felbinger ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ev/evolution-data-server/package.nix b/pkgs/by-name/ev/evolution-data-server/package.nix
index 228e20ae0eab..91e9ebba95d3 100644
--- a/pkgs/by-name/ev/evolution-data-server/package.nix
+++ b/pkgs/by-name/ev/evolution-data-server/package.nix
@@ -30,7 +30,7 @@
 , ninja
 , libkrb5
 , openldap
-, enableOAuth2 ? stdenv.isLinux
+, enableOAuth2 ? stdenv.hostPlatform.isLinux
 , webkitgtk_4_1
 , webkitgtk_6_0
 , json-glib
@@ -106,7 +106,7 @@ stdenv.mkDerivation rec {
     libphonenumber
     boost
     protobuf
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ] ++ lib.optionals withGtk3 [
     gtk3
@@ -141,14 +141,14 @@ stdenv.mkDerivation rec {
     "-DENABLE_OAUTH2_WEBKITGTK4=${lib.boolToString (withGtk4 && enableOAuth2)}"
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace cmake/modules/SetupBuildFlags.cmake \
       --replace "-Wl,--no-undefined" ""
     substituteInPlace src/services/evolution-alarm-notify/e-alarm-notify.c \
       --replace "G_OS_WIN32" "__APPLE__"
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/lib/evolution-data-server/*.dylib $out/lib/
   '';
 
diff --git a/pkgs/by-name/ew/eww/package.nix b/pkgs/by-name/ew/eww/package.nix
index 1c3ba7798c1f..41bf6c7b5500 100644
--- a/pkgs/by-name/ew/eww/package.nix
+++ b/pkgs/by-name/ew/eww/package.nix
@@ -72,6 +72,6 @@ rustPlatform.buildRustPackage rec {
       w-lfchen
     ];
     mainProgram = "eww";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ex/ext4fuse/package.nix b/pkgs/by-name/ex/ext4fuse/package.nix
index b083ec1c63f4..4ab5612fe8f5 100644
--- a/pkgs/by-name/ex/ext4fuse/package.nix
+++ b/pkgs/by-name/ex/ext4fuse/package.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
     which
   ];
 
-  buildInputs = [ (if stdenv.isDarwin then macfuse-stubs else fuse) ];
+  buildInputs = [ (if stdenv.hostPlatform.isDarwin then macfuse-stubs else fuse) ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/by-name/ez/eza/package.nix b/pkgs/by-name/ez/eza/package.nix
index 627376f49d2d..3380e98a1171 100644
--- a/pkgs/by-name/ez/eza/package.nix
+++ b/pkgs/by-name/ez/eza/package.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ cmake pkg-config installShellFiles pandoc ];
   buildInputs = [ zlib ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   buildNoDefaultFeatures = true;
   buildFeatures = lib.optional gitSupport "git";
diff --git a/pkgs/by-name/fa/facter/package.nix b/pkgs/by-name/fa/facter/package.nix
index fa92def6b1bc..8d5f3bc03add 100644
--- a/pkgs/by-name/fa/facter/package.nix
+++ b/pkgs/by-name/fa/facter/package.nix
@@ -35,7 +35,7 @@ bundlerApp {
           procps
           util-linux
         ]
-        ++ lib.optionals stdenv.isLinux [
+        ++ lib.optionals stdenv.hostPlatform.isLinux [
           iproute2
           virt-what
           zfs
diff --git a/pkgs/by-name/fa/fail2ban/package.nix b/pkgs/by-name/fa/fail2ban/package.nix
index 20f89c501dde..6943ccc447a0 100644
--- a/pkgs/by-name/fa/fail2ban/package.nix
+++ b/pkgs/by-name/fa/fail2ban/package.nix
@@ -23,7 +23,7 @@ python3.pkgs.buildPythonApplication rec {
   nativeBuildInputs = [ installShellFiles ];
 
   pythonPath = with python3.pkgs;
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       systemd
       pyinotify
 
@@ -83,7 +83,7 @@ python3.pkgs.buildPythonApplication rec {
       rm $out/bin/fail2ban-python
       ln -s ${python3.interpreter} $out/bin/fail2ban-python
 
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       # see https://github.com/NixOS/nixpkgs/issues/4968
       rm -r "${sitePackages}/usr"
     '';
diff --git a/pkgs/by-name/fa/fastfetch/package.nix b/pkgs/by-name/fa/fastfetch/package.nix
index 05723d9fa4a6..3a52b165b58a 100644
--- a/pkgs/by-name/fa/fastfetch/package.nix
+++ b/pkgs/by-name/fa/fastfetch/package.nix
@@ -43,7 +43,7 @@
   x11Support ? true,
 }:
 let
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   pname = "fastfetch";
@@ -77,7 +77,7 @@ stdenv'.mkDerivation (finalAttrs: {
       sqlite
       yyjson
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       dbus
       dconf
       ddcutil
@@ -103,8 +103,8 @@ stdenv'.mkDerivation (finalAttrs: {
       xorg.libXdmcp
       xorg.libXext
     ]
-    ++ lib.optionals (x11Support && (!stdenv.isDarwin)) [ xfce.xfconf ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals (x11Support && (!stdenv.hostPlatform.isDarwin)) [ xfce.xfconf ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk_11_0.frameworks;
       [
         Apple80211
@@ -138,10 +138,10 @@ stdenv'.mkDerivation (finalAttrs: {
       (lib.cmakeBool "ENABLE_X11" x11Support)
       (lib.cmakeBool "ENABLE_XCB" x11Support)
       (lib.cmakeBool "ENABLE_XCB_RANDR" x11Support)
-      (lib.cmakeBool "ENABLE_XFCONF" (x11Support && (!stdenv.isDarwin)))
+      (lib.cmakeBool "ENABLE_XFCONF" (x11Support && (!stdenv.hostPlatform.isDarwin)))
       (lib.cmakeBool "ENABLE_XRANDR" x11Support)
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       (lib.cmakeOptionType "filepath" "CUSTOM_PCI_IDS_PATH" "${hwdata}/share/hwdata/pci.ids")
       (lib.cmakeOptionType "filepath" "CUSTOM_AMDGPU_IDS_PATH" "${libdrm}/share/libdrm/amdgpu.ids")
     ];
diff --git a/pkgs/by-name/fa/fastqc/package.nix b/pkgs/by-name/fa/fastqc/package.nix
index e7973ab0d602..9c63a98e7711 100644
--- a/pkgs/by-name/fa/fastqc/package.nix
+++ b/pkgs/by-name/fa/fastqc/package.nix
@@ -23,8 +23,8 @@ stdenv.mkDerivation (finalAttrs: {
   dontBuild = true;
 
   nativeBuildInputs = [ makeWrapper imagemagick ]
-                      ++ lib.optional stdenv.isLinux copyDesktopItems # postInstallHook
-                      ++ lib.optional stdenv.isDarwin desktopToDarwinBundle; #fixupOutputHook
+                      ++ lib.optional stdenv.hostPlatform.isLinux copyDesktopItems # postInstallHook
+                      ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle; #fixupOutputHook
   buildInputs = [ jre perl];
 
   desktopItem = (makeDesktopItem {
diff --git a/pkgs/by-name/fa/fatrop/package.nix b/pkgs/by-name/fa/fatrop/package.nix
index e85eede1e2d9..87d66c67802a 100644
--- a/pkgs/by-name/fa/fatrop/package.nix
+++ b/pkgs/by-name/fa/fatrop/package.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs =
     [ blasfeo ]
     ++ lib.optionals pythonSupport [ python3Packages.pybind11 ]
-    ++ lib.optionals stdenv.isDarwin [ llvmPackages.openmp ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages.openmp ];
 
   cmakeFlags = [
     (lib.cmakeBool "BUILD_DOCS" true)
diff --git a/pkgs/by-name/fe/febio-studio/package.nix b/pkgs/by-name/fe/febio-studio/package.nix
index 654046067dc8..5897fae85a1a 100644
--- a/pkgs/by-name/fe/febio-studio/package.nix
+++ b/pkgs/by-name/fe/febio-studio/package.nix
@@ -25,7 +25,7 @@
 
 let
   stdenv' =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       overrideSDK stdenv {
         darwinSdkVersion = "11.0";
         darwinMinVersion = "10.15";
diff --git a/pkgs/by-name/fe/febio/package.nix b/pkgs/by-name/fe/febio/package.nix
index 01897ae76036..3f70ad711d76 100644
--- a/pkgs/by-name/fe/febio/package.nix
+++ b/pkgs/by-name/fe/febio/package.nix
@@ -14,7 +14,7 @@
 }:
 
 let
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 
 stdenv'.mkDerivation (finalAttrs: {
@@ -56,7 +56,7 @@ stdenv'.mkDerivation (finalAttrs: {
   buildInputs =
     [ zlib ]
     ++ lib.optionals mklSupport [ mkl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreGraphics
       darwin.apple_sdk.frameworks.CoreVideo
       darwin.apple_sdk.frameworks.Accelerate
diff --git a/pkgs/by-name/fe/fedimint/package.nix b/pkgs/by-name/fe/fedimint/package.nix
index 0e38132affc4..f282b70c4ded 100644
--- a/pkgs/by-name/fe/fedimint/package.nix
+++ b/pkgs/by-name/fe/fedimint/package.nix
@@ -17,7 +17,7 @@ let
   # Rust rocksdb bindings have C++ compilation/linking errors on Darwin when using newer clang
   # Forcing it to clang 12 fixes the issue.
   buildRustPackage =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       rustPlatform.buildRustPackage.override { stdenv = llvmPackages_12.stdenv; }
     else
       rustPlatform.buildRustPackage;
@@ -44,7 +44,7 @@ buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     libiconv
     Security
diff --git a/pkgs/by-name/fe/feishin/package.nix b/pkgs/by-name/fe/feishin/package.nix
index 99307c37dcea..0ed5aed53c6a 100644
--- a/pkgs/by-name/fe/feishin/package.nix
+++ b/pkgs/by-name/fe/feishin/package.nix
@@ -34,8 +34,8 @@ buildNpmPackage {
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
 
   nativeBuildInputs =
-    lib.optionals (stdenv.isLinux) [ copyDesktopItems ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.autoSignDarwinBinariesHook ];
+    lib.optionals (stdenv.hostPlatform.isLinux) [ copyDesktopItems ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.autoSignDarwinBinariesHook ];
 
   postPatch =
     ''
@@ -47,7 +47,7 @@ buildNpmPackage {
       substituteInPlace src/main/main.ts \
         --replace-fail "autoUpdater.checkForUpdatesAndNotify();" ""
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       # https://github.com/electron/electron/issues/31121
       substituteInPlace src/main/main.ts \
         --replace-fail "process.resourcesPath" "'$out/share/feishin/resources'"
@@ -77,7 +77,7 @@ buildNpmPackage {
     '';
 
   postBuild =
-    lib.optionalString stdenv.isDarwin ''
+    lib.optionalString stdenv.hostPlatform.isDarwin ''
       # electron-builder appears to build directly on top of Electron.app, by overwriting the files in the bundle.
       cp -r ${electron.dist}/Electron.app ./
       find ./Electron.app -name 'Info.plist' | xargs -d '\n' chmod +rw
@@ -90,7 +90,7 @@ buildNpmPackage {
     + ''
       npm exec electron-builder -- \
         --dir \
-        -c.electronDist=${if stdenv.isDarwin then "./" else electron.dist} \
+        -c.electronDist=${if stdenv.hostPlatform.isDarwin then "./" else electron.dist} \
         -c.electronVersion=${electron.version} \
         -c.npmRebuild=false
     '';
@@ -99,12 +99,12 @@ buildNpmPackage {
     ''
       runHook preInstall
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/{Applications,bin}
       cp -r release/build/**/Feishin.app $out/Applications/
       makeWrapper $out/Applications/Feishin.app/Contents/MacOS/Feishin $out/bin/feishin
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/share/feishin
       pushd release/build/*/
       cp -r locales resources{,.pak} $out/share/feishin
diff --git a/pkgs/by-name/fi/fim-rs/package.nix b/pkgs/by-name/fi/fim-rs/package.nix
index f2b1cf85dff6..2b1cdc313ce3 100644
--- a/pkgs/by-name/fi/fim-rs/package.nix
+++ b/pkgs/by-name/fi/fim-rs/package.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     bzip2
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/by-name/fi/firefoxpwa/package.nix b/pkgs/by-name/fi/firefoxpwa/package.nix
index 45c837756867..13ca4fbcd6c1 100644
--- a/pkgs/by-name/fi/firefoxpwa/package.nix
+++ b/pkgs/by-name/fi/firefoxpwa/package.nix
@@ -69,7 +69,7 @@ rustPlatform.buildRustPackage rec {
   libs =
     let
       libs =
-        lib.optionals stdenv.isLinux [
+        lib.optionals stdenv.hostPlatform.isLinux [
           cups
           ffmpeg
           libglvnd
diff --git a/pkgs/by-name/fi/fittrackee/package.nix b/pkgs/by-name/fi/fittrackee/package.nix
index 467e65f04434..e12db808ac2d 100644
--- a/pkgs/by-name/fi/fittrackee/package.nix
+++ b/pkgs/by-name/fi/fittrackee/package.nix
@@ -98,7 +98,7 @@ python.pkgs.buildPythonApplication rec {
     export DATABASE_TEST_URL=postgresql://$PGUSER/$PGDATABASE?host=$PGHOST
   '';
 
-  doCheck = !stdenv.isDarwin; # tests are a bit flaky on darwin
+  doCheck = !stdenv.hostPlatform.isDarwin; # tests are a bit flaky on darwin
 
   preCheck = ''
     export TMP=$TMPDIR
diff --git a/pkgs/by-name/fj/fjo/package.nix b/pkgs/by-name/fj/fjo/package.nix
index d451f8342671..7671073cd3ee 100644
--- a/pkgs/by-name/fj/fjo/package.nix
+++ b/pkgs/by-name/fj/fjo/package.nix
@@ -23,6 +23,6 @@ rustPlatform.buildRustPackage rec {
     license = lib.licenses.agpl3Only;
     mainProgram = "berg";
     maintainers = with lib.maintainers; [ ehmry ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/fl/flake-checker/package.nix b/pkgs/by-name/fl/flake-checker/package.nix
index 5ccab79d9718..80512e1bf7d9 100644
--- a/pkgs/by-name/fl/flake-checker/package.nix
+++ b/pkgs/by-name/fl/flake-checker/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-0iH5owyNfIpRz6nYwrJUoqd9lVGZ3T3K8rmsOk2UoGI=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Security
     SystemConfiguration
   ]);
diff --git a/pkgs/by-name/fl/flake-edit/package.nix b/pkgs/by-name/fl/flake-edit/package.nix
index e3d0522026d0..cfe799a143e9 100644
--- a/pkgs/by-name/fl/flake-edit/package.nix
+++ b/pkgs/by-name/fl/flake-edit/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
     [
       openssl
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/by-name/fl/flameshot/package.nix b/pkgs/by-name/fl/flameshot/package.nix
index c86e5cc62bc8..3c60703a3a36 100644
--- a/pkgs/by-name/fl/flameshot/package.nix
+++ b/pkgs/by-name/fl/flameshot/package.nix
@@ -16,10 +16,10 @@
   enableMonochromeIcon ? false,
 }:
 
-assert stdenv.isDarwin -> (!enableWlrSupport);
+assert stdenv.hostPlatform.isDarwin -> (!enableWlrSupport);
 
 let
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 
 stdenv'.mkDerivation {
@@ -49,11 +49,11 @@ stdenv'.mkDerivation {
       (lib.cmakeBool "DISABLE_UPDATE_CHECKER" true)
       (lib.cmakeBool "USE_MONOCHROME_ICON" enableMonochromeIcon)
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       (lib.cmakeBool "USE_WAYLAND_CLIPBOARD" true)
       (lib.cmakeBool "USE_WAYLAND_GRIM" enableWlrSupport)
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       (lib.cmakeFeature "Qt5_DIR" "${libsForQt5.qtbase.dev}/lib/cmake/Qt5")
     ];
 
@@ -65,7 +65,7 @@ stdenv'.mkDerivation {
       libsForQt5.wrapQtAppsHook
       makeBinaryWrapper
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       imagemagick
       libicns
     ];
@@ -75,7 +75,7 @@ stdenv'.mkDerivation {
     libsForQt5.kguiaddons
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix icns generation running concurrently with png generation
     sed -E -i '/"iconutil -o/i\
         )\
@@ -89,7 +89,7 @@ stdenv'.mkDerivation {
         src/CMakeLists.txt
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications
     mv $out/bin/flameshot.app $out/Applications
 
@@ -106,7 +106,7 @@ stdenv'.mkDerivation {
   postFixup =
     let
       binary =
-        if stdenv.isDarwin then "Applications/flameshot.app/Contents/MacOS/flameshot" else "bin/flameshot";
+        if stdenv.hostPlatform.isDarwin then "Applications/flameshot.app/Contents/MacOS/flameshot" else "bin/flameshot";
     in
     ''
       wrapProgram $out/${binary} \
diff --git a/pkgs/by-name/fl/flashgbx/package.nix b/pkgs/by-name/fl/flashgbx/package.nix
index d6cd2eac6075..07af37b5dce2 100644
--- a/pkgs/by-name/fl/flashgbx/package.nix
+++ b/pkgs/by-name/fl/flashgbx/package.nix
@@ -49,7 +49,7 @@ python3Packages.buildPythonApplication rec {
     requests
     setuptools
     qt6.qtbase
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qt6.qtwayland
   ];
 
diff --git a/pkgs/by-name/fl/flashprog/package.nix b/pkgs/by-name/fl/flashprog/package.nix
index b0bb52f1d383..b70a559ac645 100644
--- a/pkgs/by-name/fl/flashprog/package.nix
+++ b/pkgs/by-name/fl/flashprog/package.nix
@@ -9,7 +9,7 @@
 , pkg-config
 , stdenv
 , withJlink ? true
-, withGpio ? stdenv.isLinux
+, withGpio ? stdenv.hostPlatform.isLinux
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     libftdi1
     libusb1
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     pciutils
   ] ++ lib.optionals (withJlink) [
     libjaylink
@@ -46,10 +46,10 @@ stdenv.mkDerivation (finalAttrs: {
       "PREFIX=$(out)"
       "CONFIG_JLINK_SPI=${yesNo withJlink}"
       "CONFIG_LINUX_GPIO_SPI=${yesNo withGpio}"
-      "CONFIG_ENABLE_LIBPCI_PROGRAMMERS=${yesNo (!stdenv.isDarwin)}"
-      "CONFIG_INTERNAL_X86=${yesNo (!(stdenv.isDarwin) && stdenv.isx86_64)}"
-      "CONFIG_INTERNAL_DMI=${yesNo (!(stdenv.isDarwin) && stdenv.isx86_64)}"
-      "CONFIG_RAYER_SPI=${yesNo (!(stdenv.isDarwin) && stdenv.isx86_64)}"
+      "CONFIG_ENABLE_LIBPCI_PROGRAMMERS=${yesNo (!stdenv.hostPlatform.isDarwin)}"
+      "CONFIG_INTERNAL_X86=${yesNo (!(stdenv.hostPlatform.isDarwin) && stdenv.hostPlatform.isx86_64)}"
+      "CONFIG_INTERNAL_DMI=${yesNo (!(stdenv.hostPlatform.isDarwin) && stdenv.hostPlatform.isx86_64)}"
+      "CONFIG_RAYER_SPI=${yesNo (!(stdenv.hostPlatform.isDarwin) && stdenv.hostPlatform.isx86_64)}"
     ];
 
   meta = with lib; {
diff --git a/pkgs/by-name/fl/flatter/package.nix b/pkgs/by-name/fl/flatter/package.nix
index bd8d5605edaa..5ef1b6a01444 100644
--- a/pkgs/by-name/fl/flatter/package.nix
+++ b/pkgs/by-name/fl/flatter/package.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
     mpfr
     fplll
     eigen
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.openmp
   ];
 
diff --git a/pkgs/by-name/fl/flawz/package.nix b/pkgs/by-name/fl/flawz/package.nix
index d149b4108624..fb40c65dc218 100644
--- a/pkgs/by-name/fl/flawz/package.nix
+++ b/pkgs/by-name/fl/flawz/package.nix
@@ -52,6 +52,6 @@ rustPlatform.buildRustPackage rec {
     mainProgram = "flawz";
     maintainers = with lib.maintainers; [ anas ];
     platforms = with lib.platforms; unix ++ windows;
-    broken = stdenv.isDarwin; # needing some apple_sdk packages
+    broken = stdenv.hostPlatform.isDarwin; # needing some apple_sdk packages
   };
 }
diff --git a/pkgs/by-name/fl/flip-link/package.nix b/pkgs/by-name/fl/flip-link/package.nix
index b4ba056ee3b4..f652cb11ccac 100644
--- a/pkgs/by-name/fl/flip-link/package.nix
+++ b/pkgs/by-name/fl/flip-link/package.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-x3JnqztoLol5dNMact/qMveQuvcMTg/jqHxW0lksB7Y=";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   checkFlags = [
     # requires embedded toolchains
diff --git a/pkgs/by-name/fl/flite/package.nix b/pkgs/by-name/fl/flite/package.nix
index 1edb95c2d4b8..514ded67728a 100644
--- a/pkgs/by-name/fl/flite/package.nix
+++ b/pkgs/by-name/fl/flite/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
     })
   ];
 
-  buildInputs = lib.optional stdenv.isLinux (
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux (
     {
       alsa = alsa-lib;
       pulseaudio = libpulseaudio;
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   configureFlags = [
     "--enable-shared"
-  ] ++ lib.optionals stdenv.isLinux [ "--with-audio=${audioBackend}" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "--with-audio=${audioBackend}" ];
 
   # main/Makefile creates and removes 'flite_voice_list.c' from multiple targets:
   # make[1]: *** No rule to make target 'flite_voice_list.c', needed by 'all'.  Stop
diff --git a/pkgs/by-name/fl/fluent-bit/package.nix b/pkgs/by-name/fl/fluent-bit/package.nix
index dbbb41852524..8f3839130828 100644
--- a/pkgs/by-name/fl/fluent-bit/package.nix
+++ b/pkgs/by-name/fl/fluent-bit/package.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   # optional only to avoid linux rebuild
-  patches = lib.optionals stdenv.isDarwin [ ./macos-11-sdk-compat.patch ];
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [ ./macos-11-sdk-compat.patch ];
 
   nativeBuildInputs = [
     cmake
@@ -38,8 +38,8 @@ stdenv.mkDerivation (finalAttrs: {
       libyaml
       postgresql
     ]
-    ++ lib.optionals stdenv.isLinux [ systemd ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ systemd ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.IOKit
       darwin.apple_sdk_11_0.frameworks.Foundation
     ];
@@ -49,11 +49,11 @@ stdenv.mkDerivation (finalAttrs: {
     "-DFLB_METRICS=ON"
     "-DFLB_HTTP_SERVER=ON"
     "-DFLB_OUT_PGSQL=ON"
-  ] ++ lib.optionals stdenv.isDarwin [ "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.13" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.13" ];
 
   env.NIX_CFLAGS_COMPILE = toString (
     # Used by the embedded luajit, but is not predefined on older mac SDKs.
-    lib.optionals stdenv.isDarwin [ "-DTARGET_OS_IPHONE=0" ]
+    lib.optionals stdenv.hostPlatform.isDarwin [ "-DTARGET_OS_IPHONE=0" ]
     # Assumes GNU version of strerror_r, and the posix version has an
     # incompatible return type.
     ++ lib.optionals (!stdenv.hostPlatform.isGnu) [ "-Wno-int-conversion" ]
diff --git a/pkgs/by-name/fo/forgejo-cli/package.nix b/pkgs/by-name/fo/forgejo-cli/package.nix
index c8965fa3beea..ee49edd29110 100644
--- a/pkgs/by-name/fo/forgejo-cli/package.nix
+++ b/pkgs/by-name/fo/forgejo-cli/package.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage {
       openssl
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/by-name/fo/forgejo/generic.nix b/pkgs/by-name/fo/forgejo/generic.nix
index a2a1e51850bc..8ca9a12e96ac 100644
--- a/pkgs/by-name/fo/forgejo/generic.nix
+++ b/pkgs/by-name/fo/forgejo/generic.nix
@@ -158,7 +158,7 @@ buildGoModule rec {
     changelog = "https://codeberg.org/forgejo/forgejo/releases/tag/${src.rev}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ emilylange urandom bendlas adamcstephens ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "gitea";
   };
 }
diff --git a/pkgs/by-name/fo/formatjson5/package.nix b/pkgs/by-name/fo/formatjson5/package.nix
index 852b4096254c..112f94aa8358 100644
--- a/pkgs/by-name/fo/formatjson5/package.nix
+++ b/pkgs/by-name/fo/formatjson5/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-zPgaZPDyNVPmBXz6QwOYnmh/sbJ8aPST8znLMfIWejk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   cargoBuildFlags = [ "--example formatjson5" ];
 
diff --git a/pkgs/by-name/fo/fortune-kind/package.nix b/pkgs/by-name/fo/fortune-kind/package.nix
index 1fd3783735d8..bea0bec5c403 100644
--- a/pkgs/by-name/fo/fortune-kind/package.nix
+++ b/pkgs/by-name/fo/fortune-kind/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-hxbvsAQsZWUAgj8QAlcxqBA5YagLO3/vz9lQGJMHUjw=";
 
   nativeBuildInputs = [ makeBinaryWrapper installShellFiles ];
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   buildNoDefaultFeatures = true;
 
diff --git a/pkgs/by-name/fr/frankenphp/package.nix b/pkgs/by-name/fr/frankenphp/package.nix
index da6d32c5c7b8..9cae030df839 100644
--- a/pkgs/by-name/fr/frankenphp/package.nix
+++ b/pkgs/by-name/fr/frankenphp/package.nix
@@ -19,9 +19,9 @@ let
   phpEmbedWithZts = php.override {
     embedSupport = true;
     ztsSupport = true;
-    staticSupport = stdenv.isDarwin;
+    staticSupport = stdenv.hostPlatform.isDarwin;
     zendSignalsSupport = false;
-    zendMaxExecutionTimersSupport = stdenv.isLinux;
+    zendMaxExecutionTimersSupport = stdenv.hostPlatform.isLinux;
   };
   phpUnwrapped = phpEmbedWithZts.unwrapped;
   phpConfig = "${phpUnwrapped.dev}/bin/php-config";
@@ -45,7 +45,7 @@ in buildGoModule rec {
   vendorHash = "sha256-U2B0ok6TgqUPMwlnkzpPkJLG22S3VpoU80bWwZAeaJo=";
 
   buildInputs = [ phpUnwrapped brotli ] ++ phpUnwrapped.buildInputs;
-  nativeBuildInputs = [ makeBinaryWrapper ] ++ lib.optionals stdenv.isDarwin [ pkg-config cctools darwin.autoSignDarwinBinariesHook ];
+  nativeBuildInputs = [ makeBinaryWrapper ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkg-config cctools darwin.autoSignDarwinBinariesHook ];
 
   subPackages = [ "frankenphp" ];
 
@@ -63,7 +63,7 @@ in buildGoModule rec {
     export CGO_LDFLAGS="-DFRANKENPHP_VERSION=${version} \
       $(${phpConfig} --ldflags) \
       $(${phpConfig} --libs)"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # replace hard-code homebrew path
     substituteInPlace ../frankenphp.go \
       --replace "-L/opt/homebrew/opt/libiconv/lib" "-L${libiconv}/lib"
diff --git a/pkgs/by-name/fr/freecad/package.nix b/pkgs/by-name/fr/freecad/package.nix
index f272988ee555..fda823b66744 100644
--- a/pkgs/by-name/fr/freecad/package.nix
+++ b/pkgs/by-name/fr/freecad/package.nix
@@ -23,7 +23,7 @@
 , pkg-config
 , python311Packages
 , runCommand  # for passthru.tests
-, spaceNavSupport ? stdenv.isLinux
+, spaceNavSupport ? stdenv.hostPlatform.isLinux
 , stdenv
 , swig
 , vtk
diff --git a/pkgs/by-name/fr/fretboard/package.nix b/pkgs/by-name/fr/fretboard/package.nix
index 6cc8b189e765..57d8de7846e1 100644
--- a/pkgs/by-name/fr/fretboard/package.nix
+++ b/pkgs/by-name/fr/fretboard/package.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
     glib
     gtk4
     libadwaita
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
@@ -65,6 +65,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "fretboard";
     maintainers = with maintainers; [ michaelgrahamevans ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ft/ftgl/package.nix b/pkgs/by-name/ft/ftgl/package.nix
index d1fb07167e13..ee2a3e2457bf 100644
--- a/pkgs/by-name/ft/ftgl/package.nix
+++ b/pkgs/by-name/ft/ftgl/package.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   ];
   buildInputs = [
     freetype
-  ] ++ (if stdenv.isDarwin then [
+  ] ++ (if stdenv.hostPlatform.isDarwin then [
     OpenGL
     GLUT
   ] else [
diff --git a/pkgs/by-name/fu/furmark/package.nix b/pkgs/by-name/fu/furmark/package.nix
index c3e84546f826..adc2f9dc66d4 100644
--- a/pkgs/by-name/fu/furmark/package.nix
+++ b/pkgs/by-name/fu/furmark/package.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     libGL
     libGLU
-  ] ++ lib.optionals stdenv.isAarch64 [ libxcrypt-legacy ];
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [ libxcrypt-legacy ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/by-name/fw/fwupd/package.nix b/pkgs/by-name/fw/fwupd/package.nix
index f366b9290a96..c38eb75de8cc 100644
--- a/pkgs/by-name/fw/fwupd/package.nix
+++ b/pkgs/by-name/fw/fwupd/package.nix
@@ -67,7 +67,7 @@ let
   haveDell = isx86;
 
   # only redfish for x86_64
-  haveRedfish = stdenv.isx86_64;
+  haveRedfish = stdenv.hostPlatform.isx86_64;
 
   # only use msr if x86 (requires cpuid)
   haveMSR = isx86;
diff --git a/pkgs/by-name/fy/fyne/package.nix b/pkgs/by-name/fy/fyne/package.nix
index a2e2e3826543..fafe2a36a3be 100644
--- a/pkgs/by-name/fy/fyne/package.nix
+++ b/pkgs/by-name/fy/fyne/package.nix
@@ -40,7 +40,7 @@ buildGoModule rec {
       libXrandr
       libXxf86vm
     ]
-    ++ (lib.optionals stdenv.isDarwin (
+    ++ (lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk_11_0.frameworks;
       [
         Carbon
diff --git a/pkgs/by-name/ga/gambit-project/package.nix b/pkgs/by-name/ga/gambit-project/package.nix
index 630549a59caa..1c254e025190 100644
--- a/pkgs/by-name/ga/gambit-project/package.nix
+++ b/pkgs/by-name/ga/gambit-project/package.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs =
     lib.optional withGui wxGTK31
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Cocoa;
 
   strictDeps = true;
 
diff --git a/pkgs/by-name/ga/gavin-bc/package.nix b/pkgs/by-name/ga/gavin-bc/package.nix
index ad8364d41ce4..58c9ce61033d 100644
--- a/pkgs/by-name/ga/gavin-bc/package.nix
+++ b/pkgs/by-name/ga/gavin-bc/package.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.bsd2;
     maintainers = [ lib.maintainers.AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
 # TODO: cover most of configure settings
diff --git a/pkgs/by-name/gc/gcs/package.nix b/pkgs/by-name/gc/gcs/package.nix
index 954128a40ba1..53fe4896f3b4 100644
--- a/pkgs/by-name/gc/gcs/package.nix
+++ b/pkgs/by-name/gc/gcs/package.nix
@@ -71,7 +71,7 @@ buildGoModule rec {
       fontconfig
       freetype
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.Carbon
       darwin.apple_sdk_11_0.frameworks.Cocoa
       darwin.apple_sdk_11_0.frameworks.Kernel
@@ -100,6 +100,6 @@ buildGoModule rec {
     maintainers = with lib.maintainers; [ tomasajt ];
     platforms = lib.platforms.linux ++ lib.platforms.darwin;
     # incompatible vendor/github.com/richardwilkes/unison/internal/skia/libskia_linux.a
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/gd/gdlv/package.nix b/pkgs/by-name/gd/gdlv/package.nix
index 27628ae34d6b..59423a71ee5a 100644
--- a/pkgs/by-name/gd/gdlv/package.nix
+++ b/pkgs/by-name/gd/gdlv/package.nix
@@ -23,12 +23,12 @@ buildGoModule rec {
   subPackages = ".";
 
   preBuild =
-    lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11.0")
+    lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11.0")
       ''
         export MACOSX_DEPLOYMENT_TARGET=10.15
       '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreGraphics
     Foundation
diff --git a/pkgs/by-name/ge/gen-license/package.nix b/pkgs/by-name/ge/gen-license/package.nix
index fc6200797d86..a69b44d78473 100644
--- a/pkgs/by-name/ge/gen-license/package.nix
+++ b/pkgs/by-name/ge/gen-license/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-TEsWACxEs4eJ8rO4RnKJWpwT1KcDoBEGftHSJt4YXVw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/ge/geoserver/package.nix b/pkgs/by-name/ge/geoserver/package.nix
index ed1c82f80643..76a68eea8c3a 100644
--- a/pkgs/by-name/ge/geoserver/package.nix
+++ b/pkgs/by-name/ge/geoserver/package.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: rec {
   installPhase =
     let
       inputs = finalAttrs.buildInputs or [ ];
-      ldLibraryPathEnvName = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+      ldLibraryPathEnvName = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     in
     ''
       runHook preInstall
diff --git a/pkgs/by-name/ge/gepetto-viewer/package.nix b/pkgs/by-name/ge/gepetto-viewer/package.nix
index 3ea4da20ece0..da5429416d60 100644
--- a/pkgs/by-name/ge/gepetto-viewer/package.nix
+++ b/pkgs/by-name/ge/gepetto-viewer/package.nix
@@ -44,8 +44,8 @@ let
     ];
 
     cmakeFlags = [
-      (lib.cmakeBool "BUILD_PY_QCUSTOM_PLOT" (!stdenv.isDarwin))
-      (lib.cmakeBool "BUILD_PY_QGV" (!stdenv.isDarwin))
+      (lib.cmakeBool "BUILD_PY_QCUSTOM_PLOT" (!stdenv.hostPlatform.isDarwin))
+      (lib.cmakeBool "BUILD_PY_QGV" (!stdenv.hostPlatform.isDarwin))
     ];
 
     outputs = [
@@ -67,7 +67,7 @@ let
       libsForQt5.wrapQtAppsHook
       pkg-config
       python3Packages.python
-    ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ darwin.autoSignDarwinBinariesHook ];
+    ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ darwin.autoSignDarwinBinariesHook ];
 
     propagatedBuildInputs = [
       jrl-cmakemodules
@@ -80,7 +80,7 @@ let
 
     # wrapQtAppsHook uses isMachO, which fails to detect binaries without this
     # ref. https://github.com/NixOS/nixpkgs/pull/138334
-    preFixup = lib.optionalString stdenv.isDarwin "export LC_ALL=C";
+    preFixup = lib.optionalString stdenv.hostPlatform.isDarwin "export LC_ALL=C";
 
     postFixup = ''
       # CMake is not aware exports are in $dev
diff --git a/pkgs/by-name/ge/gex/package.nix b/pkgs/by-name/ge/gex/package.nix
index 2b404b98f44b..b23169f058e2 100644
--- a/pkgs/by-name/ge/gex/package.nix
+++ b/pkgs/by-name/ge/gex/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     [
       libgit2
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
     ];
 
diff --git a/pkgs/by-name/gf/gfal2/package.nix b/pkgs/by-name/gf/gfal2/package.nix
index 3b3debaf7fef..205f6e192bc4 100644
--- a/pkgs/by-name/gf/gfal2/package.nix
+++ b/pkgs/by-name/gf/gfal2/package.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
     lfc = false;
     # Break because of redundant `-luuid`. This needs to be fixed from the gfal2 upstream.
     # TODO: Change back to `true` once fixed.
-    mock = !stdenv.isDarwin;
+    mock = !stdenv.hostPlatform.isDarwin;
     rfio = false;
     sftp = true;
     srm = false;
diff --git a/pkgs/by-name/gh/ghciwatch/package.nix b/pkgs/by-name/gh/ghciwatch/package.nix
index b505e405e173..db5353c92653 100644
--- a/pkgs/by-name/gh/ghciwatch/package.nix
+++ b/pkgs/by-name/gh/ghciwatch/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-bE2cNgmq1TxtEDmLuyJVJpaj0Gbt73fnD1j/X42OL/w=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
   ];
diff --git a/pkgs/by-name/gh/ghex/package.nix b/pkgs/by-name/gh/ghex/package.nix
index 0d81d0ba969f..a0de4d0c65b0 100644
--- a/pkgs/by-name/gh/ghex/package.nix
+++ b/pkgs/by-name/gh/ghex/package.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
   mesonFlags = [
     "-Dgtk_doc=true"
     "-Dvapi=true"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # mremap does not exist on darwin
     "-Dmmap-buffer-backend=false"
   ];
diff --git a/pkgs/by-name/gi/girouette/package.nix b/pkgs/by-name/gi/girouette/package.nix
index 2c2a733c3117..09b0d61fccc9 100644
--- a/pkgs/by-name/gi/girouette/package.nix
+++ b/pkgs/by-name/gi/girouette/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     dbus
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/gi/git-agecrypt/package.nix b/pkgs/by-name/gi/git-agecrypt/package.nix
index a9c2d85ff63c..bdd9beba175d 100644
--- a/pkgs/by-name/gi/git-agecrypt/package.nix
+++ b/pkgs/by-name/gi/git-agecrypt/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage {
   nativeBuildInputs = [ pkg-config git ];
 
   buildInputs = [ libgit2 zlib ]
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
 
   meta = with lib; {
diff --git a/pkgs/by-name/gi/git-gr/package.nix b/pkgs/by-name/gi/git-gr/package.nix
index 96a03ed49e94..a50d389c04d0 100644
--- a/pkgs/by-name/gi/git-gr/package.nix
+++ b/pkgs/by-name/gi/git-gr/package.nix
@@ -35,11 +35,11 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs =
     [installShellFiles]
-    ++ lib.optional stdenv.isLinux pkg-config;
+    ++ lib.optional stdenv.hostPlatform.isLinux pkg-config;
 
   buildInputs =
-    lib.optional stdenv.isLinux openssl
-    ++ lib.optionals stdenv.isDarwin [
+    lib.optional stdenv.hostPlatform.isLinux openssl
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/gi/git-igitt/package.nix b/pkgs/by-name/gi/git-igitt/package.nix
index a8c281991686..65ee35a5e763 100644
--- a/pkgs/by-name/gi/git-igitt/package.nix
+++ b/pkgs/by-name/gi/git-igitt/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage {
     libgit2
     oniguruma
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   env = {
     RUSTONIG_SYSTEM_LIBONIG = true;
diff --git a/pkgs/by-name/gi/git-instafix/package.nix b/pkgs/by-name/gi/git-instafix/package.nix
index d05e9fab8726..18ab6f5fa0bd 100644
--- a/pkgs/by-name/gi/git-instafix/package.nix
+++ b/pkgs/by-name/gi/git-instafix/package.nix
@@ -37,6 +37,6 @@ rustPlatform.buildRustPackage {
     license = with licenses; [ mit asl20 ];
     maintainers = with maintainers; [ mightyiam quodlibetor ];
     changelog = "https://github.com/quodlibetor/git-instafix/releases/tag/v${version}";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/gi/git-together/package.nix b/pkgs/by-name/gi/git-together/package.nix
index e71668a83a73..44ae1249a59c 100644
--- a/pkgs/by-name/gi/git-together/package.nix
+++ b/pkgs/by-name/gi/git-together/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin darwin.Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.Security;
 
   OPENSSL_NO_VENDOR = true;
 
diff --git a/pkgs/by-name/gi/gitbutler/package.nix b/pkgs/by-name/gi/gitbutler/package.nix
index 66da05851dde..21fe0bb3096b 100644
--- a/pkgs/by-name/gi/gitbutler/package.nix
+++ b/pkgs/by-name/gi/gitbutler/package.nix
@@ -67,12 +67,12 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       glib-networking
       libsoup
       webkitgtk
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AppKit
@@ -144,13 +144,13 @@ rustPlatform.buildRustPackage rec {
     ''
       runHook preInstall
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/bin
       cp -r target/release/bundle/macos $out/Applications
       mv $out/Applications/GitButler.app/Contents/MacOS/GitButler $out/bin/git-butler
       ln -s $out/bin/git-butler $out/Applications/GitButler.app/Contents/MacOS/GitButler
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       cp -r target/release/bundle/"$tauriBundle"/*/data/usr $out
 
       desktop-file-edit \
diff --git a/pkgs/by-name/gi/github-runner/package.nix b/pkgs/by-name/gi/github-runner/package.nix
index 535aaeed42cf..a2923b66b3b9 100644
--- a/pkgs/by-name/gi/github-runner/package.nix
+++ b/pkgs/by-name/gi/github-runner/package.nix
@@ -113,7 +113,7 @@ buildDotnetModule rec {
   nativeBuildInputs = [
     which
     git
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     darwin.autoSignDarwinBinariesHook
   ];
 
@@ -230,7 +230,7 @@ buildDotnetModule rec {
 
     substituteInPlace $out/lib/github-runner/config.sh \
       --replace './bin/Runner.Listener' "$out/bin/Runner.Listener"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace $out/lib/github-runner/config.sh \
       --replace 'command -v ldd' 'command -v ${glibc.bin}/bin/ldd' \
       --replace 'ldd ./bin' '${glibc.bin}/bin/ldd ${dotnet-runtime}/shared/Microsoft.NETCore.App/${dotnet-runtime.version}/' \
@@ -256,7 +256,7 @@ buildDotnetModule rec {
     install -D src/Misc/layoutbin/hashFiles/index.js $out/lib/github-runner/hashFiles/index.js
     mkdir -p $out/lib/github-runner/checkScripts
     install src/Misc/layoutbin/checkScripts/* $out/lib/github-runner/checkScripts/
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     # Wrap explicitly to, e.g., prevent extra entries for LD_LIBRARY_PATH
     makeWrapperArgs=()
 
diff --git a/pkgs/by-name/gi/gitlab-ci-ls/package.nix b/pkgs/by-name/gi/gitlab-ci-ls/package.nix
index 7468842c6468..55bfc010ea92 100644
--- a/pkgs/by-name/gi/gitlab-ci-ls/package.nix
+++ b/pkgs/by-name/gi/gitlab-ci-ls/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
 
diff --git a/pkgs/by-name/gi/gitlab-release-cli/package.nix b/pkgs/by-name/gi/gitlab-release-cli/package.nix
index 64f1f24e744b..28119445dc2b 100644
--- a/pkgs/by-name/gi/gitlab-release-cli/package.nix
+++ b/pkgs/by-name/gi/gitlab-release-cli/package.nix
@@ -18,7 +18,7 @@ buildGoModule rec {
 
   vendorHash = "sha256-UwDMRsWbk8rEv2d5FssIzCLby68YZULoxd3/JGLsCQU=";
 
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     # Skip failing test
     "-skip TestHTTPSCustomCA"
   ];
diff --git a/pkgs/by-name/gi/gitlab-timelogs/package.nix b/pkgs/by-name/gi/gitlab-timelogs/package.nix
index 23c03763e314..c0dc2a2a6153 100644
--- a/pkgs/by-name/gi/gitlab-timelogs/package.nix
+++ b/pkgs/by-name/gi/gitlab-timelogs/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.SystemConfiguration
       iconv
     ];
diff --git a/pkgs/by-name/gi/gitu/package.nix b/pkgs/by-name/gi/gitu/package.nix
index eda3c91c59cb..33eb8d0c9bea 100644
--- a/pkgs/by-name/gi/gitu/package.nix
+++ b/pkgs/by-name/gi/gitu/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/by-name/gi/gitui/package.nix b/pkgs/by-name/gi/gitui/package.nix
index a93cad786827..df3adcb0e39f 100644
--- a/pkgs/by-name/gi/gitui/package.nix
+++ b/pkgs/by-name/gi/gitui/package.nix
@@ -25,8 +25,8 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isLinux xclip
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optional stdenv.hostPlatform.isLinux xclip
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
          libiconv
          darwin.apple_sdk.frameworks.Security
          darwin.apple_sdk.frameworks.AppKit
diff --git a/pkgs/by-name/gl/glfw3/package.nix b/pkgs/by-name/gl/glfw3/package.nix
index 3d5050a8d46d..a5a7b33a0a95 100644
--- a/pkgs/by-name/gl/glfw3/package.nix
+++ b/pkgs/by-name/gl/glfw3/package.nix
@@ -29,12 +29,12 @@ stdenv.mkDerivation {
   propagatedBuildInputs = lib.optionals (!stdenv.hostPlatform.isWindows) [ libGL ];
 
   nativeBuildInputs = [ cmake extra-cmake-modules ]
-    ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ]
-    ++ lib.optionals stdenv.isLinux [ wayland-scanner ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ wayland-scanner ];
 
   buildInputs =
-    lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Carbon Cocoa Kernel ])
-    ++ lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Carbon Cocoa Kernel ])
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       wayland
       wayland-protocols
       libxkbcommon
@@ -48,12 +48,12 @@ stdenv.mkDerivation {
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
-  ] ++ lib.optionals (!stdenv.isDarwin && !stdenv.hostPlatform.isWindows) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isWindows) [
     "-DCMAKE_C_FLAGS=-D_GLFW_GLX_LIBRARY='\"${lib.getLib libGL}/lib/libGL.so.1\"'"
     "-DCMAKE_C_FLAGS=-D_GLFW_EGL_LIBRARY='\"${lib.getLib libGL}/lib/libEGL.so.1\"'"
   ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace src/wl_init.c \
       --replace-fail "libxkbcommon.so.0" "${lib.getLib libxkbcommon}/lib/libxkbcommon.so.0" \
       --replace-fail "libdecor-0.so.0" "${lib.getLib libdecor}/lib/libdecor-0.so.0" \
@@ -63,7 +63,7 @@ stdenv.mkDerivation {
   '';
 
   # glfw may dlopen libwayland-client.so:
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf ''${!outputLib}/lib/libglfw.so --add-rpath ${lib.getLib wayland}/lib
   '';
 
diff --git a/pkgs/by-name/gl/glrnvim/package.nix b/pkgs/by-name/gl/glrnvim/package.nix
index 92a606699e3c..af11d0a66665 100644
--- a/pkgs/by-name/gl/glrnvim/package.nix
+++ b/pkgs/by-name/gl/glrnvim/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-cHEse+pXwgPTL8GJyY4s1mhWXGTY8Fnn2rFpA5SNerY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     DiskArbitration
     Foundation
   ]);
diff --git a/pkgs/by-name/gm/gmetronome/package.nix b/pkgs/by-name/gm/gmetronome/package.nix
index ff501861b895..7dcd816c31b4 100644
--- a/pkgs/by-name/gm/gmetronome/package.nix
+++ b/pkgs/by-name/gm/gmetronome/package.nix
@@ -39,6 +39,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = with maintainers; [ aleksana ];
     mainProgram = "gmetronome";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/gm/gmic/package.nix b/pkgs/by-name/gm/gmic/package.nix
index 602f9cc80294..71402ab7e89a 100644
--- a/pkgs/by-name/gm/gmic/package.nix
+++ b/pkgs/by-name/gm/gmic/package.nix
@@ -73,7 +73,7 @@ stdenv.mkDerivation (finalAttrs: {
   postPatch = ''
     cp -r ${finalAttrs.gmic_stdlib} src/gmic_stdlib_community.h
   ''
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace "LD_LIBRARY_PATH" "DYLD_LIBRARY_PATH"
   '';
diff --git a/pkgs/by-name/gn/gnome-maps/package.nix b/pkgs/by-name/gn/gnome-maps/package.nix
index 85515a19ad70..789e0c4d9bc0 100644
--- a/pkgs/by-name/gn/gnome-maps/package.nix
+++ b/pkgs/by-name/gn/gnome-maps/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-lAtBuXQLCBMyXjkWdYcWz4+g7k4MkZHyYM7AbZITWDU=";
   };
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeBuildInputs = [
     gettext
diff --git a/pkgs/by-name/gn/gnucap/package.nix b/pkgs/by-name/gn/gnucap/package.nix
index d67fc5d2c74b..2713a2283de6 100644
--- a/pkgs/by-name/gn/gnucap/package.nix
+++ b/pkgs/by-name/gn/gnucap/package.nix
@@ -20,7 +20,7 @@ It performs nonlinear dc and transient analyses, fourier analysis, and ac analys
     changelog = "https://git.savannah.gnu.org/cgit/gnucap.git/plain/NEWS?h=v${version}";
     license = licenses.gpl3Plus;
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # Relies on LD_LIBRARY_PATH
+    broken = stdenv.hostPlatform.isDarwin; # Relies on LD_LIBRARY_PATH
     maintainers = [ maintainers.raboof ];
     mainProgram = "gnucap";
   };
diff --git a/pkgs/by-name/gn/gnucobol/package.nix b/pkgs/by-name/gn/gnucobol/package.nix
index 7c698954e5ab..75341f91bbb9 100644
--- a/pkgs/by-name/gn/gnucobol/package.nix
+++ b/pkgs/by-name/gn/gnucobol/package.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation (finalAttrs: {
       aclocal
       automake
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # when building with nix on darwin, configure will use GNU strip,
       # which fails due to using --strip-unneeded, which is not supported
       substituteInPlace configure --replace-fail '"GNU strip"' 'FAKE GNU strip'
@@ -87,7 +87,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # error: call to undeclared function 'xmlCleanupParser'
   # ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
-  env.CFLAGS = lib.optionalString stdenv.isDarwin "-Wno-error=implicit-function-declaration";
+  env.CFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-error=implicit-function-declaration";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/by-name/go/go-ethereum/package.nix b/pkgs/by-name/go/go-ethereum/package.nix
index 4b15286f7fa9..05e8768bded8 100644
--- a/pkgs/by-name/go/go-ethereum/package.nix
+++ b/pkgs/by-name/go/go-ethereum/package.nix
@@ -50,7 +50,7 @@ in buildGoModule rec {
 
   # Fix for usb-related segmentation faults on darwin
   propagatedBuildInputs =
-    lib.optionals stdenv.isDarwin [ libobjc IOKit ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit ];
 
   passthru.tests = { inherit (nixosTests) geth; };
 
diff --git a/pkgs/by-name/go/gobang/package.nix b/pkgs/by-name/go/gobang/package.nix
index 2889747b0738..aaefff5aa3b8 100644
--- a/pkgs/by-name/go/gobang/package.nix
+++ b/pkgs/by-name/go/gobang/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs =
     with darwin.apple_sdk.frameworks;
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       Security
       SystemConfiguration
diff --git a/pkgs/by-name/go/goofcord/package.nix b/pkgs/by-name/go/goofcord/package.nix
index d3830c39b360..39249fbde729 100644
--- a/pkgs/by-name/go/goofcord/package.nix
+++ b/pkgs/by-name/go/goofcord/package.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
     copyDesktopItems
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libpulseaudio
     pipewire
     stdenv.cc.cc.lib
diff --git a/pkgs/by-name/go/google-chrome/package.nix b/pkgs/by-name/go/google-chrome/package.nix
index d5c54c6400b5..4698f9c9a416 100644
--- a/pkgs/by-name/go/google-chrome/package.nix
+++ b/pkgs/by-name/go/google-chrome/package.nix
@@ -309,4 +309,4 @@ let
     mainProgram = "google-chrome-stable";
   };
 in
-if stdenvNoCC.isDarwin then darwin else linux
+if stdenvNoCC.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/by-name/go/goss/package.nix b/pkgs/by-name/go/goss/package.nix
index 3f3a7fcebc02..0b618c195d5a 100644
--- a/pkgs/by-name/go/goss/package.nix
+++ b/pkgs/by-name/go/goss/package.nix
@@ -37,7 +37,7 @@ buildGoModule rec {
 
   postInstall = let
     runtimeDependencies = [ bash getent ]
-      ++ lib.optionals stdenv.isLinux [ systemd ];
+      ++ lib.optionals stdenv.hostPlatform.isLinux [ systemd ];
   in ''
     wrapProgram $out/bin/goss \
       --prefix PATH : "${lib.makeBinPath runtimeDependencies}"
diff --git a/pkgs/by-name/go/gossip/package.nix b/pkgs/by-name/go/gossip/package.nix
index f6c4927316d9..518539351cd0 100644
--- a/pkgs/by-name/go/gossip/package.nix
+++ b/pkgs/by-name/go/gossip/package.nix
@@ -61,7 +61,7 @@ rustPlatform.buildRustPackage rec {
       pkg-config
       rustPlatform.bindgenHook
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       wayland-scanner
     ];
 
@@ -73,7 +73,7 @@ rustPlatform.buildRustPackage rec {
       libxkbcommon
       openssl
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.Cocoa
       darwin.apple_sdk.frameworks.CoreGraphics
@@ -81,7 +81,7 @@ rustPlatform.buildRustPackage rec {
       darwin.apple_sdk.frameworks.ForceFeedback
       darwin.apple_sdk.frameworks.AVFoundation
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       wayland
       xorg.libX11
       xorg.libXcursor
@@ -99,7 +99,7 @@ rustPlatform.buildRustPackage rec {
     ln -s $out/logo/gossip.png $out/share/icons/hicolor/128x128/apps/gossip.png
   '';
 
-  postFixup = lib.optionalString (!stdenv.isDarwin) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     patchelf $out/bin/gossip \
       --add-rpath ${
         lib.makeLibraryPath [
diff --git a/pkgs/by-name/go/got/package.nix b/pkgs/by-name/go/got/package.nix
index 29931498ccaf..d872cd796042 100644
--- a/pkgs/by-name/go/got/package.nix
+++ b/pkgs/by-name/go/got/package.nix
@@ -21,7 +21,7 @@
 }:
 
 let
-  stdenv' = if stdenv.isDarwin && stdenv.isx86_64
+  stdenv' = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
     then overrideSDK stdenv "11.0"
     else stdenv;
 in
@@ -35,12 +35,12 @@ stdenv'.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ pkg-config bison ]
-    ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [ libressl libbsd libevent libuuid libmd zlib ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ libossp_uuid ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libossp_uuid ];
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # The configure script assumes dependencies on Darwin are installed via
     # Homebrew or MacPorts and hardcodes assumptions about the paths of
     # dependencies which fails the nixpkgs configurePhase.
@@ -53,12 +53,12 @@ stdenv'.mkDerivation (finalAttrs: {
   ] ++ lib.optionals withSsh [
     ''-DGOT_DIAL_PATH_SSH="${lib.getExe openssh}"''
     ''-DGOT_TAG_PATH_SSH_KEYGEN="${lib.getExe' openssh "ssh-keygen"}"''
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     ''-DGOT_TAG_PATH_SIGNIFY="${lib.getExe signify}"''
   ] ++ lib.optionals stdenv.cc.isClang [
     "-Wno-error=implicit-function-declaration"
     "-Wno-error=int-conversion"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # error: conflicting types for 'strmode'
     "-DHAVE_STRMODE=1"
     # Undefined symbols for architecture arm64: "_bsd_getopt"
diff --git a/pkgs/by-name/gp/gpscorrelate/package.nix b/pkgs/by-name/gp/gpscorrelate/package.nix
index b0e87221f8da..bb72042c21c5 100644
--- a/pkgs/by-name/gp/gpscorrelate/package.nix
+++ b/pkgs/by-name/gp/gpscorrelate/package.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     libxslt
     pkg-config
     wrapGAppsHook3
-  ] ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     exiv2
diff --git a/pkgs/by-name/gp/gptscript/package.nix b/pkgs/by-name/gp/gptscript/package.nix
index 515cb7955370..a034a08aa721 100644
--- a/pkgs/by-name/gp/gptscript/package.nix
+++ b/pkgs/by-name/gp/gptscript/package.nix
@@ -19,7 +19,7 @@ buildGoModule rec {
   vendorHash = "sha256-Kf/ckUuG+SA8WQN2MKL+Xrz91RGPuA7X2/MjryRXsts=";
 
   propagatedBuildInputs = with darwin;
-    lib.optionals stdenv.isDarwin [Security];
+    lib.optionals stdenv.hostPlatform.isDarwin [Security];
 
   ldflags = [
     "-s"
diff --git a/pkgs/by-name/gr/grafana-alloy/package.nix b/pkgs/by-name/gr/grafana-alloy/package.nix
index e9eb1133f1f1..c09e7725b9ce 100644
--- a/pkgs/by-name/gr/grafana-alloy/package.nix
+++ b/pkgs/by-name/gr/grafana-alloy/package.nix
@@ -79,7 +79,7 @@ buildGoModule rec {
 
   # uses go-systemd, which uses libsystemd headers
   # https://github.com/coreos/go-systemd/issues/351
-  NIX_CFLAGS_COMPILE = lib.optionals stdenv.isLinux [ "-I${lib.getDev systemd}/include" ];
+  NIX_CFLAGS_COMPILE = lib.optionals stdenv.hostPlatform.isLinux [ "-I${lib.getDev systemd}/include" ];
 
   checkFlags = [
     "-tags nonetwork" # disable network tests
@@ -89,7 +89,7 @@ buildGoModule rec {
   # go-systemd uses libsystemd under the hood, which does dlopen(libsystemd) at
   # runtime.
   # Add to RUNPATH so it can be found.
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf \
       --set-rpath "${lib.makeLibraryPath [ (lib.getLib systemd) ]}:$(patchelf --print-rpath $out/bin/alloy)" \
       $out/bin/alloy
diff --git a/pkgs/by-name/gu/guile-avahi/package.nix b/pkgs/by-name/gu/guile-avahi/package.nix
index c75d4ee0f079..3a8c9be42998 100644
--- a/pkgs/by-name/gu/guile-avahi/package.nix
+++ b/pkgs/by-name/gu/guile-avahi/package.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-unused-function";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-unused-function";
 
   meta = with lib; {
     description = "Bindings to Avahi for GNU Guile";
diff --git a/pkgs/by-name/gu/guile-chickadee/package.nix b/pkgs/by-name/gu/guile-chickadee/package.nix
index f4a454bf4e45..aa34a0d36df9 100644
--- a/pkgs/by-name/gu/guile-chickadee/package.nix
+++ b/pkgs/by-name/gu/guile-chickadee/package.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation (finalAttrs: {
     command = "chickadee -v";
   };
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Game development toolkit for Guile Scheme with SDL2 and OpenGL";
@@ -75,6 +75,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ chito ];
     mainProgram = "chickadee";
     platforms = guile.meta.platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/gu/guile-goblins/package.nix b/pkgs/by-name/gu/guile-goblins/package.nix
index aa5bcbc4bced..4175b9c5d79b 100644
--- a/pkgs/by-name/gu/guile-goblins/package.nix
+++ b/pkgs/by-name/gu/guile-goblins/package.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
 
   # tests hang on darwin, and fail randomly on aarch64-linux on ofborg
-  doCheck = !stdenv.isDarwin && !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isAarch64;
 
   meta = with lib; {
     description = "Spritely Goblins for Guile";
diff --git a/pkgs/by-name/gu/guile-lzlib/package.nix b/pkgs/by-name/gu/guile-lzlib/package.nix
index 21c9c6c53950..a465849470b0 100644
--- a/pkgs/by-name/gu/guile-lzlib/package.nix
+++ b/pkgs/by-name/gu/guile-lzlib/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
 
   # tests fail on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "GNU Guile library providing bindings to lzlib";
diff --git a/pkgs/by-name/gu/guile-lzma/package.nix b/pkgs/by-name/gu/guile-lzma/package.nix
index 89a361ef9e4c..9f7b941f068f 100644
--- a/pkgs/by-name/gu/guile-lzma/package.nix
+++ b/pkgs/by-name/gu/guile-lzma/package.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   # In procedure bytevector-u8-ref: Argument 2 out of range
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://ngyro.com/software/guile-lzma.html";
diff --git a/pkgs/by-name/gu/guile-quickcheck/package.nix b/pkgs/by-name/gu/guile-quickcheck/package.nix
index 0a7a0c836a64..2c3c0f9c4b9b 100644
--- a/pkgs/by-name/gu/guile-quickcheck/package.nix
+++ b/pkgs/by-name/gu/guile-quickcheck/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ guile pkg-config ];
   buildInputs = [ guile ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://ngyro.com/software/guile-quickcheck.html";
diff --git a/pkgs/by-name/gu/guile-zstd/package.nix b/pkgs/by-name/gu/guile-zstd/package.nix
index 70fea933eabb..2c0f9b8d0425 100644
--- a/pkgs/by-name/gu/guile-zstd/package.nix
+++ b/pkgs/by-name/gu/guile-zstd/package.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [ zstd ];
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "GNU Guile library providing bindings to zstd";
diff --git a/pkgs/by-name/ha/halloy/package.nix b/pkgs/by-name/ha/halloy/package.nix
index 3421fbe9f1ea..04af62588db5 100644
--- a/pkgs/by-name/ha/halloy/package.nix
+++ b/pkgs/by-name/ha/halloy/package.nix
@@ -53,7 +53,7 @@ rustPlatform.buildRustPackage rec {
       xorg.libXi
       xorg.libXrandr
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.CoreGraphics
@@ -63,7 +63,7 @@ rustPlatform.buildRustPackage rec {
       darwin.apple_sdk.frameworks.QuartzCore
       darwin.apple_sdk.frameworks.Security
     ]
-    ++ lib.optionals stdenv.isLinux [ wayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ wayland ];
 
   desktopItems = [
     (makeDesktopItem {
@@ -89,7 +89,7 @@ rustPlatform.buildRustPackage rec {
     })
   ];
 
-  postFixup = lib.optional stdenv.isLinux (
+  postFixup = lib.optional stdenv.hostPlatform.isLinux (
     let
       rpathWayland = lib.makeLibraryPath [
         wayland
@@ -106,7 +106,7 @@ rustPlatform.buildRustPackage rec {
   postInstall = ''
     install -Dm644 assets/linux/icons/hicolor/128x128/apps/org.squidowl.halloy.png \
       $out/share/icons/hicolor/128x128/apps/org.squidowl.halloy.png
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     APP_DIR="$out/Applications/Halloy.app/Contents"
 
     mkdir -p "$APP_DIR/MacOS"
diff --git a/pkgs/by-name/ha/handbrake/package.nix b/pkgs/by-name/ha/handbrake/package.nix
index c24cee4960f9..264520341ece 100644
--- a/pkgs/by-name/ha/handbrake/package.nix
+++ b/pkgs/by-name/ha/handbrake/package.nix
@@ -65,7 +65,7 @@
   # which in turn depends on systemd. systemd is not supported on Darwin, so
   # for now we disable GTK GUI support on Darwin. (It may be possible to remove
   # this restriction later.)
-  useGtk ? !stdenv.isDarwin,
+  useGtk ? !stdenv.hostPlatform.isDarwin,
   appstream,
   desktop-file-utils,
   meson,
@@ -198,7 +198,7 @@ let
             -e '/    ## Additional library and tool checks/,/    ## MinGW specific library and tool checks/d' \
             -i make/configure.py
       ''
-      + optionalString stdenv.isDarwin ''
+      + optionalString stdenv.hostPlatform.isDarwin ''
         # Prevent the configure script from failing if xcodebuild isn't available,
         # which it isn't in the Nix context. (The actual build goes fine without
         # xcodebuild.)
@@ -269,7 +269,7 @@ let
         xz
         zimg
       ]
-      ++ optional (!stdenv.isDarwin) numactl
+      ++ optional (!stdenv.hostPlatform.isDarwin) numactl
       ++ optionals useGtk [
         dbus-glib
         glib
@@ -286,7 +286,7 @@ let
         udev
       ]
       ++ optional useFdk fdk_aac
-      ++ optionals stdenv.isDarwin [
+      ++ optionals stdenv.hostPlatform.isDarwin [
         AudioToolbox
         Foundation
         libobjc
@@ -294,7 +294,7 @@ let
       ]
       # NOTE: 2018-12-27: Handbrake supports nv-codec-headers for Linux only,
       # look at ./make/configure.py search "enable_nvenc"
-      ++ optional stdenv.isLinux nv-codec-headers;
+      ++ optional stdenv.hostPlatform.isLinux nv-codec-headers;
 
     configureFlags =
       [
@@ -303,7 +303,7 @@ let
       ]
       ++ optional (!useGtk) "--disable-gtk"
       ++ optional useFdk "--enable-fdk-aac"
-      ++ optional stdenv.isDarwin "--disable-xcode"
+      ++ optional stdenv.hostPlatform.isDarwin "--disable-xcode"
       ++ optional stdenv.hostPlatform.isx86 "--harden";
 
     # NOTE: 2018-12-27: Check NixOS HandBrake test if changing
@@ -362,7 +362,7 @@ let
       ];
       mainProgram = "HandBrakeCLI";
       platforms = with platforms; unix;
-      broken = stdenv.isDarwin; # https://github.com/NixOS/nixpkgs/pull/297984#issuecomment-2016503434
+      broken = stdenv.hostPlatform.isDarwin; # https://github.com/NixOS/nixpkgs/pull/297984#issuecomment-2016503434
     };
   };
 in
diff --git a/pkgs/by-name/ha/harvid/package.nix b/pkgs/by-name/ha/harvid/package.nix
index 83f1148904ea..efbe45d667c0 100644
--- a/pkgs/by-name/ha/harvid/package.nix
+++ b/pkgs/by-name/ha/harvid/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs =
     [ pkg-config ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       which
       unixtools.xxd
     ];
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     libpng
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace libharvid/Makefile \
       --replace-fail /usr/bin/libtool ${cctools}/bin/libtool
   '';
diff --git a/pkgs/by-name/ha/hatch/package.nix b/pkgs/by-name/ha/hatch/package.nix
index 5ae22d698f21..ef827725267e 100644
--- a/pkgs/by-name/ha/hatch/package.nix
+++ b/pkgs/by-name/ha/hatch/package.nix
@@ -62,7 +62,7 @@ python3Packages.buildPythonApplication rec {
       setuptools
     ]
     ++ [ cargo ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.ps
     ];
 
@@ -100,7 +100,7 @@ python3Packages.buildPythonApplication rec {
       # Could not read ELF interpreter from any of the following paths: /bin/sh, /usr/bin/env, /bin/dash, /bin/ls
       "test_new_selected_python"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # https://github.com/NixOS/nixpkgs/issues/209358
       "test_scripts_no_environment"
 
@@ -114,9 +114,9 @@ python3Packages.buildPythonApplication rec {
       "test_macos_archflags"
       "test_macos_max_compat"
     ]
-    ++ lib.optionals stdenv.isAarch64 [ "test_resolve" ];
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [ "test_resolve" ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # AssertionError: assert [call('test h...2p32/bin/sh')] == [call('test h..., shell=True)]
     # At index 0 diff:
     #    call('test hatch-test.py3.10', shell=True, executable='/nix/store/b34ianga4diikh0kymkpqwmvba0mmzf7-bash-5.2p32/bin/sh')
diff --git a/pkgs/by-name/ha/havoc/package.nix b/pkgs/by-name/ha/havoc/package.nix
index ee5db97c9865..81b8177c4ec8 100644
--- a/pkgs/by-name/ha/havoc/package.nix
+++ b/pkgs/by-name/ha/havoc/package.nix
@@ -51,6 +51,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "havoc";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     inherit (wayland.meta) platforms;
-    broken = stdenv.isDarwin; # fatal error: 'sys/epoll.h' file not found
+    broken = stdenv.hostPlatform.isDarwin; # fatal error: 'sys/epoll.h' file not found
   };
 })
diff --git a/pkgs/by-name/ha/haylxon/package.nix b/pkgs/by-name/ha/haylxon/package.nix
index c4a781d7cde6..5f8f71f4114f 100644
--- a/pkgs/by-name/ha/haylxon/package.nix
+++ b/pkgs/by-name/ha/haylxon/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-6vVsm4gdcFCxKvvmOi3wlHkFoZp8CG+u50NfxIZqCl8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   meta = {
     description = "Save screenshots of urls and webpages from terminal";
diff --git a/pkgs/by-name/he/hercules/package.nix b/pkgs/by-name/he/hercules/package.nix
index 080d3a849beb..8a7e4a16dbaf 100644
--- a/pkgs/by-name/he/hercules/package.nix
+++ b/pkgs/by-name/he/hercules/package.nix
@@ -6,7 +6,7 @@
 , cmake
 , zlib
 , bzip2
-, enableRexx ? stdenv.isLinux, regina
+, enableRexx ? stdenv.hostPlatform.isLinux, regina
 }:
 let
   herculesCpu =
diff --git a/pkgs/by-name/hi/hieroglyphic/package.nix b/pkgs/by-name/hi/hieroglyphic/package.nix
index 4cb0ebf507e5..71f245d996f4 100644
--- a/pkgs/by-name/hi/hieroglyphic/package.nix
+++ b/pkgs/by-name/hi/hieroglyphic/package.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation (finalAttrs: {
       gtk4
       libadwaita
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       Foundation
     ];
diff --git a/pkgs/by-name/hi/himalaya/package.nix b/pkgs/by-name/hi/himalaya/package.nix
index 5a271432a0cc..027254e2423a 100644
--- a/pkgs/by-name/hi/himalaya/package.nix
+++ b/pkgs/by-name/hi/himalaya/package.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-YS8IamapvmdrOPptQh2Ef9Yold0IK1XIeGs0kDIQ5b8=";
 
-  NIX_LDFLAGS = lib.optionals stdenv.isDarwin [
+  NIX_LDFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [
     "-F${darwin.apple_sdk.frameworks.AppKit}/Library/Frameworks"
     "-framework"
     "AppKit"
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
     ++ lib.optional (installManPages || installShellCompletions) installShellFiles;
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit Cocoa Security ])
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit Cocoa Security ])
     ++ lib.optional (builtins.elem "notmuch" buildFeatures) notmuch
     ++ lib.optional (builtins.elem "pgp-gpg" buildFeatures) gpgme;
 
diff --git a/pkgs/by-name/ho/hoppscotch/package.nix b/pkgs/by-name/ho/hoppscotch/package.nix
index 5fd0dfe9e150..1484afa5a55e 100644
--- a/pkgs/by-name/ho/hoppscotch/package.nix
+++ b/pkgs/by-name/ho/hoppscotch/package.nix
@@ -50,7 +50,7 @@ let
     sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
   };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation {
     inherit
       pname
diff --git a/pkgs/by-name/hp/hpipm/package.nix b/pkgs/by-name/hp/hpipm/package.nix
index a33efcc43677..88899d752b91 100644
--- a/pkgs/by-name/hp/hpipm/package.nix
+++ b/pkgs/by-name/hp/hpipm/package.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     "-DHPIPM_FIND_BLASFEO=ON"
     "-DBUILD_SHARED_LIBS=ON"
-  ] ++ lib.optionals (!stdenv.isx86_64) [ "-DTARGET=GENERIC" ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isx86_64) [ "-DTARGET=GENERIC" ];
 
   meta = {
     description = "High-performance interior-point-method QP and QCQP solvers";
diff --git a/pkgs/by-name/ht/htb-toolkit/package.nix b/pkgs/by-name/ht/htb-toolkit/package.nix
index dbbe025bf661..df3c8cde1275 100644
--- a/pkgs/by-name/ht/htb-toolkit/package.nix
+++ b/pkgs/by-name/ht/htb-toolkit/package.nix
@@ -38,9 +38,9 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     gnome-keyring
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/ht/htcondor/package.nix b/pkgs/by-name/ht/htcondor/package.nix
index c1cf23d22abb..3cb4665f5e48 100644
--- a/pkgs/by-name/ht/htcondor/package.nix
+++ b/pkgs/by-name/ht/htcondor/package.nix
@@ -60,6 +60,6 @@ stdenv.mkDerivation rec {
     license = licenses.asl20;
     maintainers = with maintainers; [ evey ];
     # cannot find -lpthread: No such file or directory
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/ht/httpdirfs/package.nix b/pkgs/by-name/ht/httpdirfs/package.nix
index 22dbceaf3799..6b6ed108fd45 100644
--- a/pkgs/by-name/ht/httpdirfs/package.nix
+++ b/pkgs/by-name/ht/httpdirfs/package.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-PUYsT0VDEzerPqwrLJrET4kSsWsQhtnfmLepeaqtA+I=";
   };
 
-  postPatch = lib.optional stdenv.isDarwin ''
+  postPatch = lib.optional stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace-fail '-fanalyzer' '-Xanalyzer'
   '';
 
@@ -49,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   passthru = {
     # Disabled for Darwin because requires macFUSE installed outside NixOS
-    tests.version = lib.optionalAttrs stdenv.isLinux (
+    tests.version = lib.optionalAttrs stdenv.hostPlatform.isLinux (
       testers.testVersion {
         command = "${lib.getExe finalAttrs.finalPackage} --version";
         package = finalAttrs.finalPackage;
diff --git a/pkgs/by-name/ht/httptoolkit/package.nix b/pkgs/by-name/ht/httptoolkit/package.nix
index 173e093cb71c..3acc04031f88 100644
--- a/pkgs/by-name/ht/httptoolkit/package.nix
+++ b/pkgs/by-name/ht/httptoolkit/package.nix
@@ -29,7 +29,7 @@ buildNpmPackage rec {
     CSC_IDENTITY_AUTO_DISCOVERY = "false";
   };
 
-  nativeBuildInputs = [ makeWrapper ] ++ lib.optionals stdenv.isLinux [ copyDesktopItems ];
+  nativeBuildInputs = [ makeWrapper ] ++ lib.optionals stdenv.hostPlatform.isLinux [ copyDesktopItems ];
 
   npmBuildScript = "build:src";
 
@@ -50,7 +50,7 @@ buildNpmPackage rec {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/share/httptoolkit
       cp -r dist/*-unpacked/{locales,resources{,.pak}} $out/share/httptoolkit
 
@@ -64,7 +64,7 @@ buildNpmPackage rec {
           --inherit-argv0
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r dist/mac*/"HTTP Toolkit.app" $out/Applications
 
diff --git a/pkgs/by-name/hu/hurl/package.nix b/pkgs/by-name/hu/hurl/package.nix
index b758e779705f..db2f1619703d 100644
--- a/pkgs/by-name/hu/hurl/package.nix
+++ b/pkgs/by-name/hu/hurl/package.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libxml2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
   ];
 
diff --git a/pkgs/by-name/hy/hydra/package.nix b/pkgs/by-name/hy/hydra/package.nix
index 661eb4d0231c..8c88d03c21a1 100644
--- a/pkgs/by-name/hy/hydra/package.nix
+++ b/pkgs/by-name/hy/hydra/package.nix
@@ -173,7 +173,7 @@ stdenv.mkDerivation (finalAttrs: {
       darcs
       gnused
       breezy
-    ] ++ lib.optionals stdenv.isLinux [ rpm dpkg cdrkit ]
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [ rpm dpkg cdrkit ]
   );
 
   nativeBuildInputs = [
diff --git a/pkgs/by-name/im/immersed-vr/package.nix b/pkgs/by-name/im/immersed-vr/package.nix
index f057d192ca97..7bf1f14574d4 100644
--- a/pkgs/by-name/im/immersed-vr/package.nix
+++ b/pkgs/by-name/im/immersed-vr/package.nix
@@ -31,6 +31,6 @@ let
     sourceProvenance = with sourceTypes; [ binaryNativeCode ];
   };
 
-in if stdenv.isDarwin
+in if stdenv.hostPlatform.isDarwin
 then callPackage ./darwin.nix { inherit pname version src meta; }
 else callPackage ./linux.nix { inherit pname version src meta; }
diff --git a/pkgs/by-name/im/implot/demos/default.nix b/pkgs/by-name/im/implot/demos/default.nix
index b3a369668c1d..677448924dee 100644
--- a/pkgs/by-name/im/implot/demos/default.nix
+++ b/pkgs/by-name/im/implot/demos/default.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/epezent/implot_demos";
     broken =
       stdenv.hostPlatform.isAarch64 # Target "mandel" relies on AVX2
-      || stdenv.isDarwin;
+      || stdenv.hostPlatform.isDarwin;
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ SomeoneSerge ];
     mainProgram = "implot-demos";
diff --git a/pkgs/by-name/in/inshellisense/package.nix b/pkgs/by-name/in/inshellisense/package.nix
index d7a1589ccbcf..3b2a84ace0c5 100644
--- a/pkgs/by-name/in/inshellisense/package.nix
+++ b/pkgs/by-name/in/inshellisense/package.nix
@@ -20,8 +20,8 @@ buildNpmPackage rec {
   # npm ERR!   int ret = openpty(&master, &slave, nullptr, NULL, static_cast<winsi ze*>(&winp));
   #
   # when `node-gyp` tries to build the dep. The below allows `npm` to download the prebuilt binary.
-  makeCacheWritable = stdenv.isDarwin;
-  nativeBuildInputs = lib.optional stdenv.isDarwin cacert;
+  makeCacheWritable = stdenv.hostPlatform.isDarwin;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin cacert;
 
   meta = with lib; {
     description = "IDE style command line auto complete";
diff --git a/pkgs/by-name/in/inv-sig-helper/package.nix b/pkgs/by-name/in/inv-sig-helper/package.nix
index 5070b60abcdd..31f78a23b5f7 100644
--- a/pkgs/by-name/in/inv-sig-helper/package.nix
+++ b/pkgs/by-name/in/inv-sig-helper/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/by-name/ip/ipxe/package.nix b/pkgs/by-name/ip/ipxe/package.nix
index c06072a41088..85e3564f3cbb 100644
--- a/pkgs/by-name/ip/ipxe/package.nix
+++ b/pkgs/by-name/ip/ipxe/package.nix
@@ -19,7 +19,7 @@
 let
   targets =
     additionalTargets
-    // lib.optionalAttrs stdenv.isx86_64 {
+    // lib.optionalAttrs stdenv.hostPlatform.isx86_64 {
       "bin-x86_64-efi/ipxe.efi" = null;
       "bin-x86_64-efi/ipxe.efirom" = null;
       "bin-x86_64-efi/ipxe.usb" = "ipxe-efi.usb";
@@ -32,13 +32,13 @@ let
       "bin/ipxe.lkrn" = null;
       "bin/undionly.kpxe" = null;
     }
-    // lib.optionalAttrs stdenv.isAarch32 {
+    // lib.optionalAttrs stdenv.hostPlatform.isAarch32 {
       "bin-arm32-efi/ipxe.efi" = null;
       "bin-arm32-efi/ipxe.efirom" = null;
       "bin-arm32-efi/ipxe.usb" = "ipxe-efi.usb";
       "bin-arm32-efi/snp.efi" = null;
     }
-    // lib.optionalAttrs stdenv.isAarch64 {
+    // lib.optionalAttrs stdenv.hostPlatform.isAarch64 {
       "bin-arm64-efi/ipxe.efi" = null;
       "bin-arm64-efi/ipxe.efirom" = null;
       "bin-arm64-efi/ipxe.usb" = "ipxe-efi.usb";
diff --git a/pkgs/by-name/ir/iredis/package.nix b/pkgs/by-name/ir/iredis/package.nix
index 8a5956e52a69..7521bab9d9a8 100644
--- a/pkgs/by-name/ir/iredis/package.nix
+++ b/pkgs/by-name/ir/iredis/package.nix
@@ -51,7 +51,7 @@ python3.pkgs.buildPythonApplication rec {
     "--deselect=tests/unittests/test_render_functions.py::test_render_time"
     # Only execute unittests, because cli tests require a running Redis
     "tests/unittests/"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Flaky tests
     "--deselect=tests/unittests/test_entry.py::test_command_shell_options_higher_priority"
     "--deselect=tests/unittests/test_utils.py::test_timer"
diff --git a/pkgs/by-name/is/isabelle/package.nix b/pkgs/by-name/is/isabelle/package.nix
index 3adf58f467a3..1012d06542ec 100644
--- a/pkgs/by-name/is/isabelle/package.nix
+++ b/pkgs/by-name/is/isabelle/package.nix
@@ -30,7 +30,7 @@ let
       hash = "sha256-DB/ETVZhbT82IMZA97TmHG6gJcGpFavxDKDTwPzIF80=";
     };
 
-    buildPhase = (if stdenv.isDarwin then ''
+    buildPhase = (if stdenv.hostPlatform.isDarwin then ''
       LDFLAGS="-dynamic -undefined dynamic_lookup -lSystem"
     '' else ''
       LDFLAGS="-fPIC -shared"
@@ -52,7 +52,7 @@ in stdenv.mkDerivation (finalAttrs: rec {
   dirname = "Isabelle${version}";
 
   src =
-    if stdenv.isDarwin
+    if stdenv.hostPlatform.isDarwin
     then
       fetchurl
         {
@@ -74,14 +74,14 @@ in stdenv.mkDerivation (finalAttrs: rec {
   nativeBuildInputs = [ java ];
 
   buildInputs = [ polyml veriT vampire eprover-ho nettools ]
-    ++ lib.optionals (!stdenv.isDarwin) [ java procps ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ java procps ];
 
-  sourceRoot = "${dirname}${lib.optionalString stdenv.isDarwin ".app"}";
+  sourceRoot = "${dirname}${lib.optionalString stdenv.hostPlatform.isDarwin ".app"}";
 
   doCheck = stdenv.hostPlatform.system != "aarch64-linux";
   checkPhase = "bin/isabelle build -v HOL-SMT_Examples";
 
-  postUnpack = lib.optionalString stdenv.isDarwin ''
+  postUnpack = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mv $sourceRoot ${dirname}
     sourceRoot=${dirname}
   '';
@@ -144,10 +144,10 @@ in stdenv.mkDerivation (finalAttrs: rec {
   '' + lib.optionalString (stdenv.hostPlatform.system == "x86_64-darwin") ''
     substituteInPlace lib/scripts/isabelle-platform \
       --replace-fail 'ISABELLE_APPLE_PLATFORM64=arm64-darwin' ""
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     arch=${if stdenv.hostPlatform.system == "aarch64-linux" then "arm64-linux" else stdenv.hostPlatform.system}
     for f in contrib/*/$arch/{z3,nunchaku,spass,zipperposition}; do
-      patchelf --set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker) "$f"${lib.optionalString stdenv.isAarch64 " || true"}
+      patchelf --set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker) "$f"${lib.optionalString stdenv.hostPlatform.isAarch64 " || true"}
     done
     patchelf --set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker) contrib/bash_process-*/$arch/bash_process
     for d in contrib/kodkodi-*/jni/$arch; do
@@ -221,7 +221,7 @@ in stdenv.mkDerivation (finalAttrs: rec {
     license = licenses.bsd3;
     maintainers = [ maintainers.jwiegley maintainers.jvanbruegge ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
   passthru.withComponents = f:
diff --git a/pkgs/by-name/iv/iverilog/package.nix b/pkgs/by-name/iv/iverilog/package.nix
index 06e8a94a4c53..3dbbd8056dd3 100644
--- a/pkgs/by-name/iv/iverilog/package.nix
+++ b/pkgs/by-name/iv/iverilog/package.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
   };
 
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
   # (see https://github.com/steveicarus/iverilog/issues/917)
   # so disable the full suite for now.
   doCheck = true;
-  doInstallCheck = !stdenv.isAarch64;
+  doInstallCheck = !stdenv.hostPlatform.isAarch64;
 
   nativeInstallCheckInputs = [
     perl
diff --git a/pkgs/by-name/j/j/package.nix b/pkgs/by-name/j/j/package.nix
index 97a8064cc60d..a832bc953333 100644
--- a/pkgs/by-name/j/j/package.nix
+++ b/pkgs/by-name/j/j/package.nix
@@ -30,17 +30,17 @@ stdenv.mkDerivation rec {
 
   # Emulate jplatform64.sh configuration variables
   jplatform =
-    if stdenv.isDarwin then "darwin"
+    if stdenv.hostPlatform.isDarwin then "darwin"
     else if stdenv.hostPlatform.isAarch then "raspberry"
-    else if stdenv.isLinux then "linux"
+    else if stdenv.hostPlatform.isLinux then "linux"
     else "unsupported";
 
   j64x =
-    if stdenv.is32bit then "j32"
-    else if stdenv.isx86_64 then
-      if stdenv.isLinux && avx2Support then "j64avx2" else "j64"
-    else if stdenv.isAarch64 then
-      if stdenv.isDarwin then "j64arm" else "j64"
+    if stdenv.hostPlatform.is32bit then "j32"
+    else if stdenv.hostPlatform.isx86_64 then
+      if stdenv.hostPlatform.isLinux && avx2Support then "j64avx2" else "j64"
+    else if stdenv.hostPlatform.isAarch64 then
+      if stdenv.hostPlatform.isDarwin then "j64arm" else "j64"
     else "unsupported";
 
   env.NIX_LDFLAGS = "-lgmp";
@@ -80,7 +80,7 @@ stdenv.mkDerivation rec {
     '';
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ raskin synthetica AndersonTorres ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     platforms = platforms.all;
     mainProgram = "jconsole";
   };
diff --git a/pkgs/by-name/jd/jdt-language-server/package.nix b/pkgs/by-name/jd/jdt-language-server/package.nix
index 33d735424c32..268599a385ec 100644
--- a/pkgs/by-name/jd/jdt-language-server/package.nix
+++ b/pkgs/by-name/jd/jdt-language-server/package.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation (finalAttrs: {
       # The application ships with different config directories for each platform.
       # Note the application come with ARM variants as well, although the
       # current included wrapper doesn't use them.
-      configDir = if stdenv.isDarwin then "config_mac" else "config_linux";
+      configDir = if stdenv.hostPlatform.isDarwin then "config_mac" else "config_linux";
     in
     ''
       runHook preInstall
diff --git a/pkgs/by-name/je/jellyfin-web/package.nix b/pkgs/by-name/je/jellyfin-web/package.nix
index c1f81ee3f2f5..ee5622baabd6 100644
--- a/pkgs/by-name/je/jellyfin-web/package.nix
+++ b/pkgs/by-name/je/jellyfin-web/package.nix
@@ -16,7 +16,7 @@ let
   # node-canvas builds code that requires aligned_alloc,
   # which on Darwin requires at least the 10.15 SDK
   stdenv' =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       overrideSDK stdenv {
         darwinMinVersion = "10.15";
         darwinSdkVersion = "11.0";
@@ -42,11 +42,11 @@ buildNpmPackage' rec {
 
   npmBuildScript = [ "build:production" ];
 
-  nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.isDarwin [ xcbuild ];
+  nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   buildInputs =
     [ pango ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       giflib
       darwin.apple_sdk.frameworks.CoreText
     ];
diff --git a/pkgs/by-name/ji/jikken/package.nix b/pkgs/by-name/ji/jikken/package.nix
index aa4ab8184578..a401e9633fbc 100644
--- a/pkgs/by-name/ji/jikken/package.nix
+++ b/pkgs/by-name/ji/jikken/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.IOKit
       darwin.apple_sdk_11_0.frameworks.Security
       darwin.apple_sdk_11_0.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/jn/jnv/package.nix b/pkgs/by-name/jn/jnv/package.nix
index ecb59dad3775..6257fbeede66 100644
--- a/pkgs/by-name/jn/jnv/package.nix
+++ b/pkgs/by-name/jn/jnv/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-xF0sxoSo7z7lxrF3wFAmU7edREoWKBFBnZ6Xq22c8q0=";
 
-  buildInputs = lib.optional stdenv.isDarwin (
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks;
     [
       CoreGraphics
diff --git a/pkgs/by-name/jo/job-security/package.nix b/pkgs/by-name/jo/job-security/package.nix
index 3912f03daf6b..1d057f6ecd01 100644
--- a/pkgs/by-name/jo/job-security/package.nix
+++ b/pkgs/by-name/jo/job-security/package.nix
@@ -23,6 +23,6 @@ rustPlatform.buildRustPackage rec {
     license = with lib.licenses; [ asl20 mit mpl20 ];
     maintainers = with lib.maintainers; [ fgaz ];
     mainProgram = "jobs";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/jo/jogl/package.nix b/pkgs/by-name/jo/jogl/package.nix
index a12b6b762220..d8a626ee15c0 100644
--- a/pkgs/by-name/jo/jogl/package.nix
+++ b/pkgs/by-name/jo/jogl/package.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation {
       --delete '//*[@if="setup.addNativeBroadcom"]' \
       jogl/make/build-newt.xml
   ''
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i '/if="use.macos/d' gluegen/make/gluegen-cpptasks-base.xml
     rm -r jogl/oculusvr-sdk
   '';
@@ -67,11 +67,11 @@ stdenv.mkDerivation {
     git
     xmlstarlet
     stripJavaArchivesHook
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     xcbuild
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     udev
     xorg.libX11
     xorg.libXrandr
@@ -81,7 +81,7 @@ stdenv.mkDerivation {
     xorg.libXxf86vm
     xorg.libXrender
     mesa
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.AppKit
     darwin.apple_sdk_11_0.frameworks.Cocoa
   ];
diff --git a/pkgs/by-name/jo/joshuto/package.nix b/pkgs/by-name/jo/joshuto/package.nix
index 18ef1ea06369..0d35b905a99b 100644
--- a/pkgs/by-name/jo/joshuto/package.nix
+++ b/pkgs/by-name/jo/joshuto/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/jo/josm/package.nix b/pkgs/by-name/jo/josm/package.nix
index 749f6e0ba295..920b294562d1 100644
--- a/pkgs/by-name/jo/josm/package.nix
+++ b/pkgs/by-name/jo/josm/package.nix
@@ -33,10 +33,10 @@ stdenv.mkDerivation rec {
   dontUnpack = true;
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ jre ];
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ jre ];
 
   installPhase =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       mkdir -p $out/Applications
       ${unzip}/bin/unzip ${srcs.macosx} 'JOSM.app/*' -d $out/Applications
     '' else ''
diff --git a/pkgs/by-name/jo/jove/package.nix b/pkgs/by-name/jo/jove/package.nix
index 82c3f9056d35..8c4c17170753 100644
--- a/pkgs/by-name/jo/jove/package.nix
+++ b/pkgs/by-name/jo/jove/package.nix
@@ -53,6 +53,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
     # never built on Hydra: https://hydra.nixos.org/job/nixpkgs/trunk/jove.x86_64-darwin
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ju/just/package.nix b/pkgs/by-name/ju/just/package.nix
index 3dfcd639f5d1..169829952641 100644
--- a/pkgs/by-name/ju/just/package.nix
+++ b/pkgs/by-name/ju/just/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-X3noVDRnnrR6xuOBfoH4JPdcPLOBHbGQb6opNvzK/TE=";
 
   nativeBuildInputs = [ installShellFiles mdbook ];
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   preCheck = ''
     # USER must not be empty
diff --git a/pkgs/by-name/ju/justbuild/package.nix b/pkgs/by-name/ju/justbuild/package.nix
index 7b531d554eae..86274edd4f3e 100644
--- a/pkgs/by-name/ju/justbuild/package.nix
+++ b/pkgs/by-name/ju/justbuild/package.nix
@@ -90,7 +90,7 @@ stdenv.mkDerivation rec {
     mv etc/repos.json.patched etc/repos.json
     jq '.unknown.PATH = []' etc/toolchain/CC/TARGETS > etc/toolchain/CC/TARGETS.patched
     mv etc/toolchain/CC/TARGETS.patched etc/toolchain/CC/TARGETS
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -ie 's|-Wl,-z,stack-size=8388608|-Wl,-stack_size,0x800000|' bin/bootstrap.py
   '';
 
@@ -166,7 +166,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Generic build tool";
     homepage = "https://github.com/just-buildsystem/justbuild";
     license = licenses.asl20;
diff --git a/pkgs/by-name/jw/jwasm/package.nix b/pkgs/by-name/jw/jwasm/package.nix
index a1cf1a9cf5c0..eaf30e58356e 100644
--- a/pkgs/by-name/jw/jwasm/package.nix
+++ b/pkgs/by-name/jw/jwasm/package.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.gpl2Plus;
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
 # TODO: generalize for Windows builds
diff --git a/pkgs/by-name/ka/kakoune-lsp/package.nix b/pkgs/by-name/ka/kakoune-lsp/package.nix
index 74fdfb2c6e30..42176134371b 100644
--- a/pkgs/by-name/ka/kakoune-lsp/package.nix
+++ b/pkgs/by-name/ka/kakoune-lsp/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-QonOqdcdp1vbxzLnF46X0DLVay2Up1LvHZ/ZZ04LqlE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     Security
     SystemConfiguration
diff --git a/pkgs/by-name/ka/kana/package.nix b/pkgs/by-name/ka/kana/package.nix
index 3fc7e8d3c257..e0260d1363d6 100644
--- a/pkgs/by-name/ka/kana/package.nix
+++ b/pkgs/by-name/ka/kana/package.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     gst-plugins-base
     gst-plugins-bad
     gst-plugins-good
-  ]) ++ lib.optionals stdenv.isDarwin [
+  ]) ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/ka/kanha/package.nix b/pkgs/by-name/ka/kanha/package.nix
index c3f713d0370d..583671f38433 100644
--- a/pkgs/by-name/ka/kanha/package.nix
+++ b/pkgs/by-name/ka/kanha/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/by-name/ka/kanidm/package.nix b/pkgs/by-name/ka/kanidm/package.nix
index 4a6272992787..cfa9e43ba7ff 100644
--- a/pkgs/by-name/ka/kanidm/package.nix
+++ b/pkgs/by-name/ka/kanidm/package.nix
@@ -24,7 +24,7 @@
 }:
 
 let
-  arch = if stdenv.isx86_64 then "x86_64" else "generic";
+  arch = if stdenv.hostPlatform.isx86_64 then "x86_64" else "generic";
 in
 rustPlatform.buildRustPackage rec {
   pname = "kanidm";
@@ -51,7 +51,7 @@ rustPlatform.buildRustPackage rec {
       format = (formats.toml { }).generate "${KANIDM_BUILD_PROFILE}.toml";
       profile = {
         admin_bind_path = "/run/kanidmd/sock";
-        cpu_flags = if stdenv.isx86_64 then "x86_64_legacy" else "none";
+        cpu_flags = if stdenv.hostPlatform.isx86_64 then "x86_64_legacy" else "none";
         default_config_path = "/etc/kanidm/server.toml";
         default_unix_shell_path = "${lib.getBin bashInteractive}/bin/bash";
         htmx_ui_pkg_path = "@htmx_ui_pkg_path@";
diff --git a/pkgs/by-name/kc/kcl/package.nix b/pkgs/by-name/kc/kcl/package.nix
index 84012a3a59bb..b016abe16bb9 100644
--- a/pkgs/by-name/kc/kcl/package.nix
+++ b/pkgs/by-name/kc/kcl/package.nix
@@ -23,7 +23,7 @@ buildGoModule rec {
   vendorHash = "sha256-DGYYH5sKhpcWHYoUim4NyflzqsXFc4MCOqIw5jIfIiM=";
 
   # By default, libs and bins are stripped. KCL will crash on darwin if they are.
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   ldflags = [
     "-w -s"
@@ -33,7 +33,7 @@ buildGoModule rec {
   nativeBuildInputs = [ makeWrapper installShellFiles ];
 
   buildInputs = [ kclvm kclvm_cli ] ++ (
-    lib.optional stdenv.isDarwin [
+    lib.optional stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/kc/kclvm/package.nix b/pkgs/by-name/kc/kclvm/package.nix
index 08864ba0b65a..17e9cefc8f9a 100644
--- a/pkgs/by-name/kc/kclvm/package.nix
+++ b/pkgs/by-name/kc/kclvm/package.nix
@@ -28,14 +28,14 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = [ rustc ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ rustc ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libkclvm_cli_cdylib.dylib $out/lib/libkclvm_cli_cdylib.dylib
   '';
 
diff --git a/pkgs/by-name/kc/kclvm_cli/package.nix b/pkgs/by-name/kc/kclvm_cli/package.nix
index 2100a96996da..79b3b10f6664 100644
--- a/pkgs/by-name/kc/kclvm_cli/package.nix
+++ b/pkgs/by-name/kc/kclvm_cli/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   cargoPatches = [ ./cargo_lock.patch ];
 
   buildInputs = [ kclvm rustc ] ++ (
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/ke/keeweb/package.nix b/pkgs/by-name/ke/keeweb/package.nix
index 063d59880d61..48b9a603d841 100644
--- a/pkgs/by-name/ke/keeweb/package.nix
+++ b/pkgs/by-name/ke/keeweb/package.nix
@@ -82,7 +82,7 @@ let
     platforms = builtins.attrNames srcs;
   };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation {
     inherit
       pname
diff --git a/pkgs/by-name/ke/keycard-cli/package.nix b/pkgs/by-name/ke/keycard-cli/package.nix
index 017990084c56..1b815533d0ab 100644
--- a/pkgs/by-name/ke/keycard-cli/package.nix
+++ b/pkgs/by-name/ke/keycard-cli/package.nix
@@ -24,6 +24,6 @@ buildGoModule rec {
     homepage = "https://keycard.status.im";
     license = licenses.mpl20;
     maintainers = [ maintainers.zimbatm ];
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/keycard-cli.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/keycard-cli.x86_64-darwin
   };
 }
diff --git a/pkgs/by-name/ke/keydb/package.nix b/pkgs/by-name/ke/keydb/package.nix
index f33b51a0fbff..265f8a884fcb 100644
--- a/pkgs/by-name/ke/keydb/package.nix
+++ b/pkgs/by-name/ke/keydb/package.nix
@@ -48,18 +48,18 @@ stdenv.mkDerivation (finalAttrs: {
       "PREFIX=${placeholder "out"}"
       "AR=${stdenv.cc.targetPrefix}ar"
       "RANLIB=${stdenv.cc.targetPrefix}ranlib"
-      "USEASM=${if stdenv.isx86_64 then "true" else "false"}"
+      "USEASM=${if stdenv.hostPlatform.isx86_64 then "true" else "false"}"
     ]
     ++ lib.optionals (!tlsSupport) [ "BUILD_TLS=no" ]
     ++ lib.optionals withSystemd [ "USE_SYSTEMD=yes" ]
-    ++ lib.optionals (!stdenv.isx86_64) [ "MALLOC=libc" ];
+    ++ lib.optionals (!stdenv.hostPlatform.isx86_64) [ "MALLOC=libc" ];
 
   enableParallelBuilding = true;
 
-  hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
+  hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
 
   # darwin currently lacks a pure `pgrep` which is extensively used here
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [
     which
     tcl
diff --git a/pkgs/by-name/ki/kissfft/package.nix b/pkgs/by-name/ki/kissfft/package.nix
index 1480d73b537e..03d0e7d04584 100644
--- a/pkgs/by-name/ki/kissfft/package.nix
+++ b/pkgs/by-name/ki/kissfft/package.nix
@@ -62,7 +62,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # Required for `test/testcpp.c`.
   env = {
-    NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-D__MATH_LONG_DOUBLE_CONSTANTS=1";
+    NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-D__MATH_LONG_DOUBLE_CONSTANTS=1";
   };
 
   doCheck = true;
diff --git a/pkgs/by-name/kn/knxd/package.nix b/pkgs/by-name/kn/knxd/package.nix
index 38e09d579745..bcbe85fcefc2 100644
--- a/pkgs/by-name/kn/knxd/package.nix
+++ b/pkgs/by-name/kn/knxd/package.nix
@@ -10,7 +10,7 @@
 , fmt_9
 , libev
 , withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
-, withUsb ? stdenv.isLinux, libusb1
+, withUsb ? stdenv.hostPlatform.isLinux, libusb1
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [ fmt_9 libev ]
     ++ lib.optional withSystemd systemd
     ++ lib.optional withUsb libusb1
-    ++ lib.optional stdenv.isDarwin argp-standalone;
+    ++ lib.optional stdenv.hostPlatform.isDarwin argp-standalone;
 
   configureFlags = [
     (lib.enableFeature withSystemd "systemd")
diff --git a/pkgs/by-name/ko/koboldcpp/package.nix b/pkgs/by-name/ko/koboldcpp/package.nix
index 85053dc716ce..4d1a69a3b0be 100644
--- a/pkgs/by-name/ko/koboldcpp/package.nix
+++ b/pkgs/by-name/ko/koboldcpp/package.nix
@@ -16,7 +16,7 @@
   config,
   cudaPackages ? { },
 
-  openblasSupport ? !stdenv.isDarwin,
+  openblasSupport ? !stdenv.hostPlatform.isDarwin,
   openblas,
 
   cublasSupport ? config.cudaSupport,
@@ -24,14 +24,14 @@
   # For example if you're on an GTX 1080 that means you're using "Pascal" and you need to pass "sm_60"
   cudaArches ? cudaPackages.cudaFlags.realArches or [ ],
 
-  clblastSupport ? stdenv.isLinux,
+  clblastSupport ? stdenv.hostPlatform.isLinux,
   clblast,
   ocl-icd,
 
   vulkanSupport ? true,
   vulkan-loader,
 
-  metalSupport ? stdenv.isDarwin && stdenv.isAarch64,
+  metalSupport ? stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64,
   march ? "",
   mtune ? "",
 }:
@@ -44,7 +44,7 @@ let
   '';
 
   darwinFrameworks =
-    if (stdenv.isDarwin && stdenv.isx86_64) then
+    if (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) then
       darwin.apple_sdk.frameworks
     else
       darwin.apple_sdk_11_0.frameworks;
@@ -74,7 +74,7 @@ effectiveStdenv.mkDerivation (finalAttrs: {
   buildInputs =
     [ tk ]
     ++ finalAttrs.pythonInputs
-    ++ lib.optionals effectiveStdenv.isDarwin [
+    ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [
       darwinFrameworks.Accelerate
       darwinFrameworks.CoreVideo
       darwinFrameworks.CoreGraphics
@@ -100,7 +100,7 @@ effectiveStdenv.mkDerivation (finalAttrs: {
 
   pythonPath = finalAttrs.pythonInputs;
 
-  darwinLdFlags = lib.optionals stdenv.isDarwin [
+  darwinLdFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-F${darwinFrameworks.CoreServices}/Library/Frameworks"
     "-F${darwinFrameworks.Accelerate}/Library/Frameworks"
     "-framework CoreServices"
diff --git a/pkgs/by-name/ko/kokkos/package.nix b/pkgs/by-name/ko/kokkos/package.nix
index eb94813071cf..c5faab3042a3 100644
--- a/pkgs/by-name/ko/kokkos/package.nix
+++ b/pkgs/by-name/ko/kokkos/package.nix
@@ -40,6 +40,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = with licenses; [ asl20-llvm ];
     maintainers = with maintainers; [ Madouura ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ko/komac/package.nix b/pkgs/by-name/ko/komac/package.nix
index 61f41cd5c58d..3e5186ec4851 100644
--- a/pkgs/by-name/ko/komac/package.nix
+++ b/pkgs/by-name/ko/komac/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage {
     dbus
     openssl
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/ko/koodo-reader/package.nix b/pkgs/by-name/ko/koodo-reader/package.nix
index a57c44b0c37f..2d5132fb4cbe 100644
--- a/pkgs/by-name/ko/koodo-reader/package.nix
+++ b/pkgs/by-name/ko/koodo-reader/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
       yarnBuildHook
       nodejs
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       copyDesktopItems
       wrapGAppsHook3
     ];
@@ -59,7 +59,7 @@ stdenv.mkDerivation (finalAttrs: {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString (!stdenv.isDarwin) ''
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       install -Dm644 assets/icons/256x256.png $out/share/icons/hicolor/256x256/apps/koodo-reader.png
       install -Dm644 ${./mime-types.xml} $out/share/mime/packages/koodo-reader.xml
 
@@ -67,7 +67,7 @@ stdenv.mkDerivation (finalAttrs: {
       cp -r dist/*-unpacked/{locales,resources{,.pak}} $out/share/lib/koodo-reader
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r dist/mac*/"Koodo Reader.app" $out/Applications
       makeWrapper "$out/Applications/Koodo Reader.app/Contents/MacOS/Koodo Reader" $out/bin/koodo-reader
@@ -77,7 +77,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   # we use makeShellWrapper instead of the makeBinaryWrapper provided by wrapGAppsHook for proper shell variable expansion
-  postFixup = lib.optionalString (!stdenv.isDarwin) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     makeShellWrapper ${lib.getExe electron} $out/bin/koodo-reader \
       --add-flags $out/share/lib/koodo-reader/resources/app.asar \
       "''${gappsWrapperArgs[@]}" \
diff --git a/pkgs/by-name/ky/kyua/package.nix b/pkgs/by-name/ky/kyua/package.nix
index ba399a44ab74..bec61ceeb4b5 100644
--- a/pkgs/by-name/ky/kyua/package.nix
+++ b/pkgs/by-name/ky/kyua/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
         --replace-fail 'CLI_LIBS = ' 'CLI_LIBS = libutils.a '
     ''
     # These tests fail on Darwin or are unreliable.
-    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.isDarwin) ''
+    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.hostPlatform.isDarwin) ''
       sed -i utils/process/Makefile.am.inc -e '/executor_pid_test/d'
       substituteInPlace utils/process/Kyuafile \
         --replace-fail 'atf_test_program{name="executor_pid_test"}' ""
@@ -57,7 +57,7 @@ stdenv.mkDerivation (finalAttrs: {
         --replace-fail 'atf_add_test_case premature_exit' ""
     ''
     # fchflags and UF_NOUNLINK are not supported on Linux. Other tests also fail.
-    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.isLinux) ''
+    + lib.optionalString (finalAttrs.doInstallCheck && stdenv.hostPlatform.isLinux) ''
       sed -i utils/process/Makefile.am.inc -e '/executor_pid_test/d'
       substituteInPlace utils/process/Kyuafile \
         --replace-fail 'atf_test_program{name="executor_pid_test"}' ""
diff --git a/pkgs/by-name/la/lan-mouse/package.nix b/pkgs/by-name/la/lan-mouse/package.nix
index dff74b1b7958..b9bf9b2ddb02 100644
--- a/pkgs/by-name/la/lan-mouse/package.nix
+++ b/pkgs/by-name/la/lan-mouse/package.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     libX11
     libXtst
   ]
-  ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.CoreGraphics;
+  ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.CoreGraphics;
 
   cargoHash = "sha256-pDdpmZPaClU8KjFHO7v3FDQp9D83GQN+SnFg53q2fjs=";
 
diff --git a/pkgs/by-name/la/lanraragi/package.nix b/pkgs/by-name/la/lanraragi/package.nix
index ff32a96d78fd..24eab34147ed 100644
--- a/pkgs/by-name/la/lanraragi/package.nix
+++ b/pkgs/by-name/la/lanraragi/package.nix
@@ -61,7 +61,7 @@ buildNpmPackage rec {
     TimeLocal
     YAMLPP
     StringSimilarity
-  ] ++ lib.optionals stdenv.isLinux [ LinuxInotify2 ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ LinuxInotify2 ];
 
   buildPhase = ''
     runHook preBuild
diff --git a/pkgs/by-name/la/laszip/package.nix b/pkgs/by-name/la/laszip/package.nix
index 65c2e6934a24..ded2abb03fec 100644
--- a/pkgs/by-name/la/laszip/package.nix
+++ b/pkgs/by-name/la/laszip/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/by-name/la/lazymc/package.nix b/pkgs/by-name/la/lazymc/package.nix
index 9202d32b2e8a..8df8352d8a51 100644
--- a/pkgs/by-name/la/lazymc/package.nix
+++ b/pkgs/by-name/la/lazymc/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/by-name/la/lazysql/package.nix b/pkgs/by-name/la/lazysql/package.nix
index 9957de463d87..8d6e2c93fad0 100644
--- a/pkgs/by-name/la/lazysql/package.nix
+++ b/pkgs/by-name/la/lazysql/package.nix
@@ -19,7 +19,7 @@ buildGoModule rec {
 
   vendorHash = "sha256-celee8uyoirX+vtAww2iQJtRwJEHyfHL2mZA2muSRiQ=";
 
-  buildInputs = lib.optionals stdenv.isLinux [ xorg.libX11 ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ xorg.libX11 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
 
   meta = with lib; {
     description = "A cross-platform TUI database management tool written in Go";
diff --git a/pkgs/by-name/lb/lbreakouthd/package.nix b/pkgs/by-name/lb/lbreakouthd/package.nix
index 45911bacf770..267571846693 100644
--- a/pkgs/by-name/lb/lbreakouthd/package.nix
+++ b/pkgs/by-name/lb/lbreakouthd/package.nix
@@ -39,6 +39,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "lbreakouthd";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     inherit (SDL2.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ld/ld64/package.nix b/pkgs/by-name/ld/ld64/package.nix
index 2b00fdfb62db..4c9ed4c5f340 100644
--- a/pkgs/by-name/ld/ld64/package.nix
+++ b/pkgs/by-name/ld/ld64/package.nix
@@ -148,7 +148,7 @@ stdenv.mkDerivation (finalAttrs: {
     libunwind
     openssl
     xar
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.dyld ] ++ lib.optionals stdenv.isLinux [ libdispatch ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.dyld ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libdispatch ];
 
   # Note for overrides: ld64 cannot be built as a debug build because of UB in its iteration implementations,
   # which trigger libc++ debug assertions due to trying to take the address of the first element of an emtpy vector.
diff --git a/pkgs/by-name/le/leaf/package.nix b/pkgs/by-name/le/leaf/package.nix
index bda0c6d2afb0..1bd44f23d304 100644
--- a/pkgs/by-name/le/leaf/package.nix
+++ b/pkgs/by-name/le/leaf/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-2I0XusAI98WLzGcwEorPmtcK3VkpwpkIn0JKwn3gT1c=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/le/legba/package.nix b/pkgs/by-name/le/legba/package.nix
index 3f2453a13d86..efb9a351340b 100644
--- a/pkgs/by-name/le/legba/package.nix
+++ b/pkgs/by-name/le/legba/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-viDfJ214Zf5segjrLSTbHav5T5e219NAF+MvuPow+JQ=";
 
   nativeBuildInputs = [ cmake pkg-config ];
-  buildInputs = [ openssl.dev samba ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl.dev samba ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/li/liana/package.nix b/pkgs/by-name/li/liana/package.nix
index ee5147b7d091..ab9b9e15cfd0 100644
--- a/pkgs/by-name/li/liana/package.nix
+++ b/pkgs/by-name/li/liana/package.nix
@@ -94,6 +94,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.bsd3;
     maintainers = with maintainers; [ dunxen ];
     platforms = platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/li/lianad/package.nix b/pkgs/by-name/li/lianad/package.nix
index b2730c55a5bc..094044274699 100644
--- a/pkgs/by-name/li/lianad/package.nix
+++ b/pkgs/by-name/li/lianad/package.nix
@@ -38,6 +38,6 @@ rustPlatform.buildRustPackage rec {
       lib.maintainers.plebhash
     ];
     platforms = lib.platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/li/lib25519/package.nix b/pkgs/by-name/li/lib25519/package.nix
index 90d377948f93..68d35a796a03 100644
--- a/pkgs/by-name/li/lib25519/package.nix
+++ b/pkgs/by-name/li/lib25519/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
     libcpucycles
   ];
 
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id "$out/lib/lib25519.1.dylib" "$out/lib/lib25519.1.dylib"
     for f in $out/bin/*; do
       install_name_tool -change "lib25519.1.dylib" "$out/lib/lib25519.1.dylib" "$f"
@@ -45,7 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   # failure: crypto_pow does not handle p=q overlap
-  doInstallCheck = !stdenv.isDarwin;
+  doInstallCheck = !stdenv.hostPlatform.isDarwin;
   installCheckPhase = ''
     runHook preInstallCheck
     $out/bin/lib25519-test
diff --git a/pkgs/by-name/li/libarchive/package.nix b/pkgs/by-name/li/libarchive/package.nix
index 09a96e829e33..402514a64745 100644
--- a/pkgs/by-name/li/libarchive/package.nix
+++ b/pkgs/by-name/li/libarchive/package.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation (finalAttrs: {
       # access-time-related tests flakey on some systems
       "cpio/test/test_option_a.c"
       "cpio/test/test_option_t.c"
-    ] ++ lib.optionals (stdenv.isAarch64 && stdenv.isLinux) [
+    ] ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
       # only on some aarch64-linux systems?
       "cpio/test/test_basic.c"
       "cpio/test/test_format_newc.c"
@@ -82,15 +82,15 @@ stdenv.mkDerivation (finalAttrs: {
     zlib
     zstd
   ] ++ lib.optional stdenv.hostPlatform.isUnix sharutils
-    ++ lib.optionals stdenv.isLinux [ acl attr e2fsprogs ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ acl attr e2fsprogs ]
     ++ lib.optional xarSupport libxml2;
 
   # Without this, pkg-config-based dependencies are unhappy
-  propagatedBuildInputs = lib.optionals stdenv.isLinux [ attr acl ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ attr acl ];
 
   configureFlags = lib.optional (!xarSupport) "--without-xml2";
 
-  preBuild = lib.optionalString stdenv.isCygwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isCygwin ''
     echo "#include <windows.h>" >> config.h
   '';
 
diff --git a/pkgs/by-name/li/libaribcaption/package.nix b/pkgs/by-name/li/libaribcaption/package.nix
index 7d39841ec6fe..936991ef6a87 100644
--- a/pkgs/by-name/li/libaribcaption/package.nix
+++ b/pkgs/by-name/li/libaribcaption/package.nix
@@ -27,10 +27,10 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [ "-DBUILD_SHARED_LIBS=ON" ];
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     fontconfig
     freetype
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     CoreFoundation
     CoreGraphics
diff --git a/pkgs/by-name/li/libcaca/package.nix b/pkgs/by-name/li/libcaca/package.nix
index 6b99439fe017..bb0d57168766 100644
--- a/pkgs/by-name/li/libcaca/package.nix
+++ b/pkgs/by-name/li/libcaca/package.nix
@@ -7,7 +7,7 @@
 , ncurses
 , pkg-config
 , zlib
-, x11Support ? !stdenv.isDarwin
+, x11Support ? !stdenv.hostPlatform.isDarwin
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/by-name/li/libclipboard/package.nix b/pkgs/by-name/li/libclipboard/package.nix
index 1febf35d1c8f..eec120bcd62d 100644
--- a/pkgs/by-name/li/libclipboard/package.nix
+++ b/pkgs/by-name/li/libclipboard/package.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   buildInputs = [ libxcb libXau libXdmcp ]
-    ++ lib.optional stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
+    ++ lib.optional stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
   nativeBuildInputs = [ cmake pkg-config ];
 
   cmakeFlags = [ "-DBUILD_SHARED_LIBS=ON" ];
diff --git a/pkgs/by-name/li/libcpucycles/package.nix b/pkgs/by-name/li/libcpucycles/package.nix
index 4e88903de66d..84292201640b 100644
--- a/pkgs/by-name/li/libcpucycles/package.nix
+++ b/pkgs/by-name/li/libcpucycles/package.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   inherit (librandombytes) hardeningDisable configurePlatforms env;
 
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id "$out/lib/libcpucycles.1.dylib" "$out/lib/libcpucycles.1.dylib"
     install_name_tool -change "libcpucycles.1.dylib" "$out/lib/libcpucycles.1.dylib" "$out/bin/cpucycles-info"
   '';
diff --git a/pkgs/by-name/li/libdeltachat/package.nix b/pkgs/by-name/li/libdeltachat/package.nix
index 360ac8a80e1f..237e48a7c3ea 100644
--- a/pkgs/by-name/li/libdeltachat/package.nix
+++ b/pkgs/by-name/li/libdeltachat/package.nix
@@ -50,7 +50,7 @@ in stdenv.mkDerivation rec {
     pkg-config
     rustPlatform.cargoSetupHook
     cargo
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
@@ -58,7 +58,7 @@ in stdenv.mkDerivation rec {
     openssl
     sqlcipher
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/li/libetebase/package.nix b/pkgs/by-name/li/libetebase/package.nix
index d039cad84201..c76b5a2320f7 100644
--- a/pkgs/by-name/li/libetebase/package.nix
+++ b/pkgs/by-name/li/libetebase/package.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
     description = "A C library for Etebase";
     homepage = "https://www.etebase.com/";
     license = licenses.bsd3;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ laalsaas ];
     pkgConfigModules = [ "etebase" ];
   };
diff --git a/pkgs/by-name/li/libewf-legacy/package.nix b/pkgs/by-name/li/libewf-legacy/package.nix
index 3d2aee4d2874..fdd202f8c96d 100644
--- a/pkgs/by-name/li/libewf-legacy/package.nix
+++ b/pkgs/by-name/li/libewf-legacy/package.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ zlib openssl libuuid ]
-    ++ lib.optionals stdenv.isDarwin [ bzip2 ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ bzip2 ];
 
   meta = {
     description = "Legacy library for support of the Expert Witness Compression Format";
diff --git a/pkgs/by-name/li/libgedit-amtk/package.nix b/pkgs/by-name/li/libgedit-amtk/package.nix
index 76b5bfd5fcae..631e6e623b9e 100644
--- a/pkgs/by-name/li/libgedit-amtk/package.nix
+++ b/pkgs/by-name/li/libgedit-amtk/package.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     dbus # For dbus-run-session
   ];
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
   checkPhase = ''
     runHook preCheck
 
diff --git a/pkgs/by-name/li/libhttpserver/package.nix b/pkgs/by-name/li/libhttpserver/package.nix
index 2a99246aab56..a61342b99d07 100644
--- a/pkgs/by-name/li/libhttpserver/package.nix
+++ b/pkgs/by-name/li/libhttpserver/package.nix
@@ -41,6 +41,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl21Plus;
     maintainers = with maintainers; [ pongo1231 ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # configure: error: cannot find required auxiliary files: ltmain.sh
+    broken = stdenv.hostPlatform.isDarwin; # configure: error: cannot find required auxiliary files: ltmain.sh
   };
 }
diff --git a/pkgs/by-name/li/libiconv-darwin/package.nix b/pkgs/by-name/li/libiconv-darwin/package.nix
index 5792568852ff..e928cd999165 100644
--- a/pkgs/by-name/li/libiconv-darwin/package.nix
+++ b/pkgs/by-name/li/libiconv-darwin/package.nix
@@ -75,7 +75,7 @@ stdenv.mkDerivation (finalAttrs: {
   mesonFlags = [ (lib.mesonBool "tests" finalAttrs.doInstallCheck) ];
 
   postInstall =
-    lib.optionalString (stdenv.isDarwin && !hostPlatform.isStatic) ''
+    lib.optionalString (stdenv.hostPlatform.isDarwin && !hostPlatform.isStatic) ''
       ${stdenv.cc.targetPrefix}install_name_tool "$out/lib/libiconv.2.dylib" \
         -change '@rpath/libcharset.1.dylib' "$out/lib/libcharset.1.dylib"
     ''
diff --git a/pkgs/by-name/li/libisoburn/package.nix b/pkgs/by-name/li/libisoburn/package.nix
index 7fc8c6aff60f..498c3394d3e1 100644
--- a/pkgs/by-name/li/libisoburn/package.nix
+++ b/pkgs/by-name/li/libisoburn/package.nix
@@ -39,12 +39,12 @@ stdenv.mkDerivation (finalAttrs: {
     zlib
     libburn
     libisofs
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     acl
     attr
   ];
 
-  propagatedBuildInputs = lib.optionals stdenv.isLinux [
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     acl
   ];
 
diff --git a/pkgs/by-name/li/libisofs/package.nix b/pkgs/by-name/li/libisofs/package.nix
index ac9c606b5552..52b807c6c8d2 100644
--- a/pkgs/by-name/li/libisofs/package.nix
+++ b/pkgs/by-name/li/libisofs/package.nix
@@ -24,10 +24,10 @@ stdenv.mkDerivation (finalAttrs: {
     autoreconfHook
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     acl
     attr
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ] ++ [
     zlib
diff --git a/pkgs/by-name/li/libmpd/package.nix b/pkgs/by-name/li/libmpd/package.nix
index bf2e6c70d2ad..bb6c9ed45f8c 100644
--- a/pkgs/by-name/li/libmpd/package.nix
+++ b/pkgs/by-name/li/libmpd/package.nix
@@ -42,6 +42,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ doronbehar ];
     platforms = platforms.all;
     # Getting DARWIN_NULL related errors
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/li/libmpdclient/package.nix b/pkgs/by-name/li/libmpdclient/package.nix
index 691a1b76a2fb..297ca698b0c9 100644
--- a/pkgs/by-name/li/libmpdclient/package.nix
+++ b/pkgs/by-name/li/libmpdclient/package.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     meson
     ninja
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/by-name/li/libopus/package.nix b/pkgs/by-name/li/libopus/package.nix
index cdf00a244ba4..f809c40000e9 100644
--- a/pkgs/by-name/li/libopus/package.nix
+++ b/pkgs/by-name/li/libopus/package.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.mesonEnable "docs" false)
   ];
 
-  doCheck = !stdenv.isi686 && !stdenv.isAarch32; # test_unit_LPC_inv_pred_gain fails
+  doCheck = !stdenv.hostPlatform.isi686 && !stdenv.hostPlatform.isAarch32; # test_unit_LPC_inv_pred_gain fails
 
   passthru = {
     updateScript = gitUpdater {
diff --git a/pkgs/by-name/li/libplacebo_5/package.nix b/pkgs/by-name/li/libplacebo_5/package.nix
index 5bc799ddf860..e75d44dcdf26 100644
--- a/pkgs/by-name/li/libplacebo_5/package.nix
+++ b/pkgs/by-name/li/libplacebo_5/package.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     (lib.mesonBool "demos" false) # Don't build and install the demo programs
     (lib.mesonEnable "d3d11" false) # Disable the Direct3D 11 based renderer
     (lib.mesonEnable "glslang" false) # rely on shaderc for GLSL compilation instead
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (lib.mesonEnable "unwind" false) # libplacebo doesn’t build with `darwin.libunwind`
   ];
 
diff --git a/pkgs/by-name/li/librandombytes/package.nix b/pkgs/by-name/li/librandombytes/package.nix
index f36a94018e75..5bb8175420de 100644
--- a/pkgs/by-name/li/librandombytes/package.nix
+++ b/pkgs/by-name/li/librandombytes/package.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [ openssl ];
 
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id "$out/lib/librandombytes-kernel.1.dylib" "$out/lib/librandombytes-kernel.1.dylib"
     install_name_tool -change "librandombytes-kernel.1.dylib" "$out/lib/librandombytes-kernel.1.dylib" "$out/bin/randombytes-info"
   '';
diff --git a/pkgs/by-name/li/librep/package.nix b/pkgs/by-name/li/librep/package.nix
index 84f610ce2474..373f8232a857 100644
--- a/pkgs/by-name/li/librep/package.nix
+++ b/pkgs/by-name/li/librep/package.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
   strictDeps = true;
 
   # ensure libsystem/ctype functions don't get duplicated when using clang
-  configureFlags = lib.optionals stdenv.isDarwin [ "CFLAGS=-std=gnu89" ];
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "CFLAGS=-std=gnu89" ];
 
   setupHook = ./setup-hook.sh;
 
diff --git a/pkgs/by-name/li/librum/package.nix b/pkgs/by-name/li/librum/package.nix
index 2d6612c68098..40158f72a120 100644
--- a/pkgs/by-name/li/librum/package.nix
+++ b/pkgs/by-name/li/librum/package.nix
@@ -35,14 +35,14 @@ stdenv.mkDerivation rec {
     cmake
     qt6.qttools
     qt6.wrapQtAppsHook
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
   buildInputs = [
     qt6.qtbase
     qt6.qtsvg
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qt6.qtwayland
   ];
 
diff --git a/pkgs/by-name/li/libsignal-ffi/package.nix b/pkgs/by-name/li/libsignal-ffi/package.nix
index f2a8341a2097..797729d7caa0 100644
--- a/pkgs/by-name/li/libsignal-ffi/package.nix
+++ b/pkgs/by-name/li/libsignal-ffi/package.nix
@@ -32,12 +32,12 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-hQ3iWGLef1y3yyzjWH2MWcs32A7HxUSxGG8fCyMn/KE=";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   nativeBuildInputs = [
     protobuf
     rustPlatform.bindgenHook
-  ] ++ lib.optionals stdenv.isDarwin [ xcodebuild ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcodebuild ];
 
   env.BORING_BSSL_PATH = "${boringssl-wrapper}";
 
diff --git a/pkgs/by-name/li/libspatialindex/package.nix b/pkgs/by-name/li/libspatialindex/package.nix
index ead9fe2b09e0..c420532351d9 100644
--- a/pkgs/by-name/li/libspatialindex/package.nix
+++ b/pkgs/by-name/li/libspatialindex/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
     patchShebangs test/
   '';
 
-  nativeBuildInputs = [ cmake ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = [ cmake ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   cmakeFlags = [
     (lib.cmakeBool "BUILD_TESTING" finalAttrs.finalPackage.doCheck)
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   doCheck = true;
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change "@rpath/libspatialindex.7.dylib" "$out/lib/libspatialindex.7.dylib" $out/lib/libspatialindex_c.dylib
   '';
 
diff --git a/pkgs/by-name/li/libtapi/package.nix b/pkgs/by-name/li/libtapi/package.nix
index b11de1756c90..0e4f3db7611e 100644
--- a/pkgs/by-name/li/libtapi/package.nix
+++ b/pkgs/by-name/li/libtapi/package.nix
@@ -97,7 +97,7 @@ stdenv.mkDerivation (finalAttrs: {
       substituteInPlace tapi/test/CMakeLists.txt \
         --replace-fail tapi-configs ""
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       # Remove Darwin-specific versioning flags.
       substituteInPlace tapi/tools/libtapi/CMakeLists.txt \
           --replace-fail '-current_version ''${DYLIB_VERSION} -compatibility_version 1' ""
diff --git a/pkgs/by-name/li/libtorrent-rasterbar-1_2_x/package.nix b/pkgs/by-name/li/libtorrent-rasterbar-1_2_x/package.nix
index 9de8a04c34da..f5b388ea6270 100644
--- a/pkgs/by-name/li/libtorrent-rasterbar-1_2_x/package.nix
+++ b/pkgs/by-name/li/libtorrent-rasterbar-1_2_x/package.nix
@@ -25,7 +25,7 @@ in stdenv.mkDerivation {
   nativeBuildInputs = [ automake autoconf libtool pkg-config ];
 
   buildInputs = [ boostPython openssl zlib python311 libiconv ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   preConfigure = "./autotool.sh";
 
@@ -48,7 +48,7 @@ in stdenv.mkDerivation {
     description = "C++ BitTorrent implementation focusing on efficiency and scalability";
     license = licenses.bsd3;
     maintainers = [ ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     platforms = platforms.unix;
   };
 }
diff --git a/pkgs/by-name/li/libtorrent-rasterbar-2_0_x/package.nix b/pkgs/by-name/li/libtorrent-rasterbar-2_0_x/package.nix
index 4c76d021a405..3f85048e4eb7 100644
--- a/pkgs/by-name/li/libtorrent-rasterbar-2_0_x/package.nix
+++ b/pkgs/by-name/li/libtorrent-rasterbar-2_0_x/package.nix
@@ -23,7 +23,7 @@ in stdenv.mkDerivation {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ boostPython openssl zlib python3 ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   patches = [
     # provide distutils alternative for python 3.12
diff --git a/pkgs/by-name/li/libtoxcore/package.nix b/pkgs/by-name/li/libtoxcore/package.nix
index 6b3a2ffbcb01..6bad88293eb0 100644
--- a/pkgs/by-name/li/libtoxcore/package.nix
+++ b/pkgs/by-name/li/libtoxcore/package.nix
@@ -11,7 +11,7 @@
 , pkg-config
 }:
 
-let buildToxAV = !stdenv.isAarch32;
+let buildToxAV = !stdenv.hostPlatform.isAarch32;
 in stdenv.mkDerivation rec {
   pname = "libtoxcore";
   version = "0.2.19";
diff --git a/pkgs/by-name/li/libui-ng/package.nix b/pkgs/by-name/li/libui-ng/package.nix
index b5b0812d0188..cc308d86c842 100644
--- a/pkgs/by-name/li/libui-ng/package.nix
+++ b/pkgs/by-name/li/libui-ng/package.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-W9LnUBUKwx1x3+BEeUanisBGR2Q4dnbcMM5k8mCondM=";
   };
 
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     substituteInPlace meson.build --replace "'-arch', 'arm64'" ""
   '';
 
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs =
-    if stdenv.isDarwin then [
+    if stdenv.hostPlatform.isDarwin then [
       darwin.libobjc
       darwin.apple_sdk_11_0.Libsystem
       darwin.apple_sdk_11_0.frameworks.Cocoa
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     ];
 
   mesonFlags = [
-    (lib.mesonBool "examples" (!stdenv.isDarwin))
+    (lib.mesonBool "examples" (!stdenv.hostPlatform.isDarwin))
   ];
 
   passthru.updateScript = unstableGitUpdater {
diff --git a/pkgs/by-name/li/licensure/package.nix b/pkgs/by-name/li/licensure/package.nix
index 8c7485ed0a43..97db16e1fcba 100644
--- a/pkgs/by-name/li/licensure/package.nix
+++ b/pkgs/by-name/li/licensure/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-Ywfn+6qdKD9CG2/xdHR2XDsj5LF5XPJ2+XR5H1o2iXk=";
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl git gitls ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/li/lightning/package.nix b/pkgs/by-name/li/lightning/package.nix
index f85020499047..ea99a5873dc8 100644
--- a/pkgs/by-name/li/lightning/package.nix
+++ b/pkgs/by-name/li/lightning/package.nix
@@ -46,6 +46,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ AndersonTorres ];
     license = with lib.licenses; [ lgpl3Plus ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin; # failing tests
+    broken = stdenv.hostPlatform.isDarwin; # failing tests
   };
 })
diff --git a/pkgs/by-name/li/lightningcss/package.nix b/pkgs/by-name/li/lightningcss/package.nix
index 1af974647cba..cee6f869d3cc 100644
--- a/pkgs/by-name/li/lightningcss/package.nix
+++ b/pkgs/by-name/li/lightningcss/package.nix
@@ -48,6 +48,6 @@ rustPlatform.buildRustPackage rec {
     maintainers = with lib.maintainers; [ johnrtitor toastal ];
     mainProgram = "lightningcss";
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/li/littlefs-fuse/package.nix b/pkgs/by-name/li/littlefs-fuse/package.nix
index a4150b8786b5..f9a769308491 100644
--- a/pkgs/by-name/li/littlefs-fuse/package.nix
+++ b/pkgs/by-name/li/littlefs-fuse/package.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation rec {
     mainProgram = "littlefs-fuse";
     inherit (fuse.meta) platforms;
     # fatal error: 'linux/fs.h' file not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/li/live-server/package.nix b/pkgs/by-name/li/live-server/package.nix
index 1c430cad3be0..c218628eb162 100644
--- a/pkgs/by-name/li/live-server/package.nix
+++ b/pkgs/by-name/li/live-server/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         CoreServices
diff --git a/pkgs/by-name/li/live555/package.nix b/pkgs/by-name/li/live555/package.nix
index c629ff54ea6f..c425b9743f89 100644
--- a/pkgs/by-name/li/live555/package.nix
+++ b/pkgs/by-name/li/live555/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
     })
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
@@ -74,9 +74,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   configurePhase = let
     platform =
-      if stdenv.isLinux then
+      if stdenv.hostPlatform.isLinux then
         "linux"
-      else if stdenv.isDarwin then
+      else if stdenv.hostPlatform.isDarwin then
         "macosx-catalina"
       else
         throw "Unsupported platform: ${stdenv.hostPlatform.system}";
diff --git a/pkgs/by-name/ll/llama-cpp/package.nix b/pkgs/by-name/ll/llama-cpp/package.nix
index 6659122880e8..1a600461232a 100644
--- a/pkgs/by-name/ll/llama-cpp/package.nix
+++ b/pkgs/by-name/ll/llama-cpp/package.nix
@@ -20,7 +20,7 @@
 , blas
 
 , pkg-config
-, metalSupport ? stdenv.isDarwin && stdenv.isAarch64 && !openclSupport
+, metalSupport ? stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 && !openclSupport
 , vulkanSupport ? false
 , rpcSupport ? false
 , shaderc
@@ -98,7 +98,7 @@ effectiveStdenv.mkDerivation (finalAttrs: {
     autoAddDriverRunpath
   ];
 
-  buildInputs = optionals effectiveStdenv.isDarwin darwinBuildInputs
+  buildInputs = optionals effectiveStdenv.hostPlatform.isDarwin darwinBuildInputs
     ++ optionals cudaSupport cudaBuildInputs
     ++ optionals openclSupport [ clblast ]
     ++ optionals rocmSupport rocmBuildInputs
@@ -163,6 +163,6 @@ effectiveStdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ dit7ya elohmeier philiptaron ];
     platforms = platforms.unix;
     badPlatforms = optionals (cudaSupport || openclSupport) lib.platforms.darwin;
-    broken = (metalSupport && !effectiveStdenv.isDarwin);
+    broken = (metalSupport && !effectiveStdenv.hostPlatform.isDarwin);
   };
 })
diff --git a/pkgs/by-name/ll/llm-ls/package.nix b/pkgs/by-name/ll/llm-ls/package.nix
index b1e759d29a55..c7a0aec58a22 100644
--- a/pkgs/by-name/ll/llm-ls/package.nix
+++ b/pkgs/by-name/ll/llm-ls/package.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     libiconv
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/lm/lmstudio/package.nix b/pkgs/by-name/lm/lmstudio/package.nix
index 3619f799738e..6c672338493d 100644
--- a/pkgs/by-name/lm/lmstudio/package.nix
+++ b/pkgs/by-name/lm/lmstudio/package.nix
@@ -16,7 +16,7 @@ let
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
   };
 in
-  if stdenv.isDarwin
+  if stdenv.hostPlatform.isDarwin
     then callPackage ./darwin.nix { inherit pname version meta; }
     else callPackage ./linux.nix  { inherit pname version meta; }
 
diff --git a/pkgs/by-name/lo/localsend/package.nix b/pkgs/by-name/lo/localsend/package.nix
index 504500cad7aa..b2cb74054cc1 100644
--- a/pkgs/by-name/lo/localsend/package.nix
+++ b/pkgs/by-name/lo/localsend/package.nix
@@ -112,4 +112,4 @@ let
     ];
   };
 in
-if stdenv.isDarwin then darwin else linux
+if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/by-name/lo/logseq/package.nix b/pkgs/by-name/lo/logseq/package.nix
index 6c0e0dd0d7bc..06fc0d3fd0a3 100644
--- a/pkgs/by-name/lo/logseq/package.nix
+++ b/pkgs/by-name/lo/logseq/package.nix
@@ -33,21 +33,21 @@ in {
   src = fetchurl {
     inherit hash;
     url = "https://github.com/logseq/logseq/releases/download/${version}/logseq-${suffix}";
-    name = lib.optionalString stdenv.isLinux "logseq-${version}.AppImage";
+    name = lib.optionalString stdenv.hostPlatform.isLinux "logseq-${version}.AppImage";
   };
 
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ]
-    ++ lib.optionals stdenv.isDarwin [ unzip ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ unzip ];
   buildInputs = [ stdenv.cc.cc.lib ];
 
-  dontUnpack = stdenv.isLinux;
+  dontUnpack = stdenv.hostPlatform.isLinux;
   dontConfigure = true;
   dontBuild = true;
 
   installPhase = ''
     runHook preInstall
-  '' + lib.optionalString stdenv.isLinux (
+  '' + lib.optionalString stdenv.hostPlatform.isLinux (
   let
    appimageContents = appimageTools.extract { inherit pname src version; };
   in
@@ -68,7 +68,7 @@ in {
     substituteInPlace $out/share/applications/logseq.desktop \
       --replace Exec=Logseq Exec=logseq \
       --replace Icon=Logseq Icon=logseq
-  '') + lib.optionalString stdenv.isDarwin ''
+  '') + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications/Logseq.app,bin}
     cp -R . $out/Applications/Logseq.app
     makeWrapper $out/Applications/Logseq.app/Contents/MacOS/Logseq $out/bin/logseq
@@ -76,7 +76,7 @@ in {
     runHook postInstall
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     # set the env "LOCAL_GIT_DIRECTORY" for dugite so that we can use the git in nixpkgs
     makeWrapper ${electron}/bin/electron $out/bin/logseq \
       --set "LOCAL_GIT_DIRECTORY" ${git} \
diff --git a/pkgs/by-name/lp/lpairs2/package.nix b/pkgs/by-name/lp/lpairs2/package.nix
index 99a74382569a..f4ae2ad7fa17 100644
--- a/pkgs/by-name/lp/lpairs2/package.nix
+++ b/pkgs/by-name/lp/lpairs2/package.nix
@@ -37,6 +37,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "lpairs2";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/lr/lrcget/package.nix b/pkgs/by-name/lr/lrcget/package.nix
index 40da20efbcce..0d77c2d09f22 100644
--- a/pkgs/by-name/lr/lrcget/package.nix
+++ b/pkgs/by-name/lr/lrcget/package.nix
@@ -69,11 +69,11 @@ rustPlatform.buildRustPackage rec {
       openssl
       gtk3
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       webkitgtk
       alsa-lib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreAudio
       darwin.apple_sdk.frameworks.WebKit
     ];
diff --git a/pkgs/by-name/ls/lsd/package.nix b/pkgs/by-name/ls/lsd/package.nix
index 8cdf45c90d5a..9be5a2ef0dd6 100644
--- a/pkgs/by-name/ls/lsd/package.nix
+++ b/pkgs/by-name/ls/lsd/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     pandoc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   postInstall = ''
     pandoc --standalone --to man doc/lsd.md -o lsd.1
diff --git a/pkgs/by-name/ls/lsd2dsl/package.nix b/pkgs/by-name/ls/lsd2dsl/package.nix
index 4ab26b40a7c2..95663588edae 100644
--- a/pkgs/by-name/ls/lsd2dsl/package.nix
+++ b/pkgs/by-name/ls/lsd2dsl/package.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     qt6.wrapQtAppsHook
-  ] ++ lib.optional stdenv.isLinux copyDesktopItems;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux copyDesktopItems;
 
   buildInputs = [
     boost
diff --git a/pkgs/by-name/lt/ltris/package.nix b/pkgs/by-name/lt/ltris/package.nix
index 82137b2fbec6..cb0da370cd8f 100644
--- a/pkgs/by-name/lt/ltris/package.nix
+++ b/pkgs/by-name/lt/ltris/package.nix
@@ -35,6 +35,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "ltris";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     inherit (SDL.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/lz/lzlib/package.nix b/pkgs/by-name/lz/lzlib/package.nix
index b25f76871a0c..c44456bb45ca 100644
--- a/pkgs/by-name/lz/lzlib/package.nix
+++ b/pkgs/by-name/lz/lzlib/package.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation (finalAttrs: {
     # hash from release email
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile.in --replace '-Wl,--soname=' '-Wl,-install_name,$(out)/lib/'
   '';
 
diff --git a/pkgs/by-name/ma/maa-assistant-arknights/package.nix b/pkgs/by-name/ma/maa-assistant-arknights/package.nix
index b2c720f83551..7bb296ab611b 100644
--- a/pkgs/by-name/ma/maa-assistant-arknights/package.nix
+++ b/pkgs/by-name/ma/maa-assistant-arknights/package.nix
@@ -20,7 +20,7 @@ let
   sources = lib.importJSON ./pin.json;
 in
 # https://github.com/NixOS/nixpkgs/issues/314160
-(if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv).mkDerivation (finalAttr: {
+(if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv).mkDerivation (finalAttr: {
   pname = "maa-assistant-arknights" + lib.optionalString isBeta "-beta";
   version = if isBeta then sources.beta.version else sources.stable.version;
 
diff --git a/pkgs/by-name/ma/maa-cli/package.nix b/pkgs/by-name/ma/maa-cli/package.nix
index 4b01e3631b64..69c54cafcad9 100644
--- a/pkgs/by-name/ma/maa-cli/package.nix
+++ b/pkgs/by-name/ma/maa-cli/package.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/by-name/ma/manga-tui/package.nix b/pkgs/by-name/ma/manga-tui/package.nix
index e5784c15399f..aafae4ab8464 100644
--- a/pkgs/by-name/ma/manga-tui/package.nix
+++ b/pkgs/by-name/ma/manga-tui/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage {
       openssl
       sqlite
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/by-name/ma/mapcache/package.nix b/pkgs/by-name/ma/mapcache/package.nix
index e0859a91a2fe..5d38ce3f0362 100644
--- a/pkgs/by-name/ma/mapcache/package.nix
+++ b/pkgs/by-name/ma/mapcache/package.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
     (lib.cmakeFeature "APACHE_MODULE_DIR" "${placeholder "out"}/modules")
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-std=c99";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-std=c99";
 
   meta = {
     description = "Server that implements tile caching to speed up access to WMS layers";
diff --git a/pkgs/by-name/ma/mariadb-galera/package.nix b/pkgs/by-name/ma/mariadb-galera/package.nix
index 0d85c9f3d56b..ebb3eb23c954 100644
--- a/pkgs/by-name/ma/mariadb-galera/package.nix
+++ b/pkgs/by-name/ma/mariadb-galera/package.nix
@@ -53,6 +53,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl2Only;
     maintainers = with maintainers; [ izorkin ] ++ teams.helsinki-systems.members;
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ma/markuplinkchecker/package.nix b/pkgs/by-name/ma/markuplinkchecker/package.nix
index f42ea53ff992..fac663fa9833 100644
--- a/pkgs/by-name/ma/markuplinkchecker/package.nix
+++ b/pkgs/by-name/ma/markuplinkchecker/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/by-name/ma/massdns/package.nix b/pkgs/by-name/ma/massdns/package.nix
index 9b90c674adb7..b47e162861ce 100644
--- a/pkgs/by-name/ma/massdns/package.nix
+++ b/pkgs/by-name/ma/massdns/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     "PREFIX=$(out)"
     "PROJECT_FLAGS=-DMASSDNS_REVISION='\"v${version}\"'"
   ];
-  buildFlags = if stdenv.isLinux then "all" else "nolinux";
+  buildFlags = if stdenv.hostPlatform.isLinux then "all" else "nolinux";
 
   passthru.updateScript = nix-update-script { };
 
diff --git a/pkgs/by-name/ma/matrix-authentication-service/package.nix b/pkgs/by-name/ma/matrix-authentication-service/package.nix
index 501bc3e8e4fd..c6de3b3a0a09 100644
--- a/pkgs/by-name/ma/matrix-authentication-service/package.nix
+++ b/pkgs/by-name/ma/matrix-authentication-service/package.nix
@@ -50,7 +50,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     sqlite
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.CoreFoundation
     darwin.apple_sdk_11_0.frameworks.Security
     darwin.apple_sdk_11_0.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/ma/matrix-commander-rs/package.nix b/pkgs/by-name/ma/matrix-commander-rs/package.nix
index 6215f7ddc69c..78e0abebe88e 100644
--- a/pkgs/by-name/ma/matrix-commander-rs/package.nix
+++ b/pkgs/by-name/ma/matrix-commander-rs/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/by-name/ma/matugen/package.nix b/pkgs/by-name/ma/matugen/package.nix
index c4dffa14bc95..b147e74c2294 100644
--- a/pkgs/by-name/ma/matugen/package.nix
+++ b/pkgs/by-name/ma/matugen/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-pD1NKUJmvMTnYKWjRrGnvbA0zVvGpWRIlf/9ovP9Jq4=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/ma/maturin/package.nix b/pkgs/by-name/ma/maturin/package.nix
index 91ed83ea9715..fa7eb781c1e4 100644
--- a/pkgs/by-name/ma/maturin/package.nix
+++ b/pkgs/by-name/ma/maturin/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-ik6kFS66umiHf0M1fE+6++zpZF4gJrN9LQ2l+vi9SSY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     libiconv
   ];
diff --git a/pkgs/by-name/mc/mcumgr-client/package.nix b/pkgs/by-name/mc/mcumgr-client/package.nix
index f8909e8e2018..db03704cbf26 100644
--- a/pkgs/by-name/mc/mcumgr-client/package.nix
+++ b/pkgs/by-name/mc/mcumgr-client/package.nix
@@ -27,8 +27,8 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [ udev ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
+    lib.optionals stdenv.hostPlatform.isLinux [ udev ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
 
   meta = with lib; {
     description = "Client for mcumgr commands";
diff --git a/pkgs/by-name/md/md-tui/package.nix b/pkgs/by-name/md/md-tui/package.nix
index 8c74b4b29580..e781cd8a4f8d 100644
--- a/pkgs/by-name/md/md-tui/package.nix
+++ b/pkgs/by-name/md/md-tui/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/by-name/md/mdbook-alerts/package.nix b/pkgs/by-name/md/mdbook-alerts/package.nix
index 30f4cc3f6356..a36373848da1 100644
--- a/pkgs/by-name/md/mdbook-alerts/package.nix
+++ b/pkgs/by-name/md/mdbook-alerts/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-nzVvktweqrow7P/I8DhDoVJNj1COCeEhx6HLY536hYE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = {
     description = "Preprocessor for mdbook to support the inclusion of Markdown alerts";
diff --git a/pkgs/by-name/md/mdbook-d2/package.nix b/pkgs/by-name/md/mdbook-d2/package.nix
index 8b30e7fea45c..8b8a032654df 100644
--- a/pkgs/by-name/md/mdbook-d2/package.nix
+++ b/pkgs/by-name/md/mdbook-d2/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-lZ92vvRYXEBMx6ka8RP1wXctf73QNp5rNE8n7O96AEc=";
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
   ];
diff --git a/pkgs/by-name/md/mdbook/package.nix b/pkgs/by-name/md/mdbook/package.nix
index aa8ff3dec363..4734394cd7e7 100644
--- a/pkgs/by-name/md/mdbook/package.nix
+++ b/pkgs/by-name/md/mdbook/package.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd mdbook \
diff --git a/pkgs/by-name/me/mediainfo-gui/package.nix b/pkgs/by-name/me/mediainfo-gui/package.nix
index 3c9da25e33a5..b649afd83abe 100644
--- a/pkgs/by-name/me/mediainfo-gui/package.nix
+++ b/pkgs/by-name/me/mediainfo-gui/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
   buildInputs = [ libmediainfo wxGTK32 desktop-file-utils libSM imagemagick ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   sourceRoot = "MediaInfo/Project/GNU/GUI";
 
diff --git a/pkgs/by-name/me/megatools/package.nix b/pkgs/by-name/me/megatools/package.nix
index 2fbd7e88466b..6e744f5d4b89 100644
--- a/pkgs/by-name/me/megatools/package.nix
+++ b/pkgs/by-name/me/megatools/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     curl
     glib
-  ] ++ lib.optionals stdenv.isLinux [ fuse ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ fuse ];
 
   enableParallelBuilding = true;
   strictDeps = true;
diff --git a/pkgs/by-name/me/meli/package.nix b/pkgs/by-name/me/meli/package.nix
index a9116aa6546f..0fc8b082ca31 100644
--- a/pkgs/by-name/me/meli/package.nix
+++ b/pkgs/by-name/me/meli/package.nix
@@ -87,7 +87,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Terminal e-mail client and e-mail client library";
     mainProgram = "meli";
     homepage = "https://meli.delivery";
diff --git a/pkgs/by-name/me/melonDS/package.nix b/pkgs/by-name/me/melonDS/package.nix
index bb4783e966a9..e6d1f3928842 100644
--- a/pkgs/by-name/me/melonDS/package.nix
+++ b/pkgs/by-name/me/melonDS/package.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
       qtmultimedia
       zstd
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       wayland
       qtwayland
     ];
@@ -64,7 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
   strictDeps = true;
 
   qtWrapperArgs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       "--prefix LD_LIBRARY_PATH : ${
         lib.makeLibraryPath [
           libpcap
@@ -72,7 +72,7 @@ stdenv.mkDerivation (finalAttrs: {
         ]
       }"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "--prefix DYLD_LIBRARY_PATH : ${lib.makeLibraryPath [ libpcap ]}"
     ];
 
diff --git a/pkgs/by-name/me/memtest_vulkan/package.nix b/pkgs/by-name/me/memtest_vulkan/package.nix
index ee2001019716..cdbcc7982b83 100644
--- a/pkgs/by-name/me/memtest_vulkan/package.nix
+++ b/pkgs/by-name/me/memtest_vulkan/package.nix
@@ -32,6 +32,6 @@ rustPlatform.buildRustPackage rec {
     mainProgram = "memtest_vulkan";
     broken =
       stdenv.system == "aarch64-linux" # error: linker `aarch64-linux-gnu-gcc` not found
-      || stdenv.isDarwin; # Can't find Vulkan; might work though?
+      || stdenv.hostPlatform.isDarwin; # Can't find Vulkan; might work though?
   };
 }
diff --git a/pkgs/by-name/me/merkaartor/package.nix b/pkgs/by-name/me/merkaartor/package.nix
index 198992988741..8d3abd715a43 100644
--- a/pkgs/by-name/me/merkaartor/package.nix
+++ b/pkgs/by-name/me/merkaartor/package.nix
@@ -10,7 +10,7 @@
   qt5,
   withGeoimage ? true,
   exiv2,
-  withGpsdlib ? (!stdenv.isDarwin),
+  withGpsdlib ? (!stdenv.hostPlatform.isDarwin),
   gpsd,
   withLibproxy ? false,
   libproxy,
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
     (lib.cmakeBool "ZBAR" withZbar)
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv $out/merkaartor.app $out/Applications
     # Prevent wrapping, otherwise plugins will not be loaded
diff --git a/pkgs/by-name/me/meson/package.nix b/pkgs/by-name/me/meson/package.nix
index d817c63708be..db59daf3a6a8 100644
--- a/pkgs/by-name/me/meson/package.nix
+++ b/pkgs/by-name/me/meson/package.nix
@@ -108,7 +108,7 @@ python3.pkgs.buildPythonApplication rec {
   checkInputs = [
     zlib
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
@@ -116,7 +116,7 @@ python3.pkgs.buildPythonApplication rec {
     OpenAL
     OpenGL
     openldap
-  ] ++ lib.optionals (stdenv.cc.isClang && !stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.cc.isClang && !stdenv.hostPlatform.isDarwin) [
     # https://github.com/mesonbuild/meson/blob/bd3f1b2e0e70ef16dfa4f441686003212440a09b/test%20cases/common/184%20openmp/meson.build
     llvmPackages.openmp
     # https://github.com/mesonbuild/meson/blob/1670fca36fcb1a4fe4780e96731e954515501a35/test%20cases/frameworks/29%20blocks/meson.build
@@ -144,10 +144,10 @@ python3.pkgs.buildPythonApplication rec {
     ''test cases/linuxlike/14 static dynamic linkage''
     # Nixpkgs cctools does not have bitcode support.
     ''test cases/osx/7 bitcode''
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # requires llvmPackages.openmp, creating cyclic dependency
     ''test cases/common/184 openmp''
-  ] ++ lib.optionals stdenv.isFreeBSD [
+  ] ++ lib.optionals stdenv.hostPlatform.isFreeBSD [
     # pch doesn't work quite right on FreeBSD, I think
     ''test cases/common/13 pch''
   ]))
diff --git a/pkgs/by-name/me/mesonlsp/package.nix b/pkgs/by-name/me/mesonlsp/package.nix
index 70a7417ce958..e1e0a3b771c1 100644
--- a/pkgs/by-name/me/mesonlsp/package.nix
+++ b/pkgs/by-name/me/mesonlsp/package.nix
@@ -52,11 +52,11 @@ stdenv.mkDerivation (finalAttrs: {
       libpkgconf
       nlohmann_json
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libossp_uuid
       pkgsStatic.fmt
     ]
-    ++ lib.optionals stdenv.isLinux [ libuuid ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libuuid ];
 
   mesonFlags = [ "-Dbenchmarks=false" ];
 
diff --git a/pkgs/by-name/me/metronome/package.nix b/pkgs/by-name/me/metronome/package.nix
index f21a941a9e37..6c75f65dd3d7 100644
--- a/pkgs/by-name/me/metronome/package.nix
+++ b/pkgs/by-name/me/metronome/package.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     gst_all_1.gstreamer
     gst_all_1.gst-plugins-base
     gst_all_1.gst-plugins-bad
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/mi/miru/package.nix b/pkgs/by-name/mi/miru/package.nix
index 48f990e902c1..c842e475ca1a 100644
--- a/pkgs/by-name/mi/miru/package.nix
+++ b/pkgs/by-name/mi/miru/package.nix
@@ -36,7 +36,7 @@ let
     updateScript = ./update.sh;
   };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   callPackage ./darwin.nix {
     inherit
       pname
diff --git a/pkgs/by-name/mi/mistral-rs/package.nix b/pkgs/by-name/mi/mistral-rs/package.nix
index 9f4bf825664f..35db87eb173a 100644
--- a/pkgs/by-name/mi/mistral-rs/package.nix
+++ b/pkgs/by-name/mi/mistral-rs/package.nix
@@ -63,7 +63,7 @@ let
 
   metalSupport =
     assert accelIsValid;
-    (acceleration == "metal") || (stdenv.isDarwin && stdenv.isAarch64 && (acceleration == null));
+    (acceleration == "metal") || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 && (acceleration == null));
 
   darwinBuildInputs =
     with darwin.apple_sdk.frameworks;
@@ -114,7 +114,7 @@ rustPlatform.buildRustPackage rec {
       cudaPackages.libcurand
     ]
     ++ lib.optionals mklSupport [ mkl ]
-    ++ lib.optionals stdenv.isDarwin darwinBuildInputs;
+    ++ lib.optionals stdenv.hostPlatform.isDarwin darwinBuildInputs;
 
   cargoBuildFlags =
     [
@@ -125,7 +125,7 @@ rustPlatform.buildRustPackage rec {
     ]
     ++ lib.optionals cudaSupport [ "--features=cuda" ]
     ++ lib.optionals mklSupport [ "--features=mkl" ]
-    ++ lib.optionals (stdenv.isDarwin && metalSupport) [ "--features=metal" ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && metalSupport) [ "--features=metal" ];
 
   env =
     {
@@ -186,7 +186,7 @@ rustPlatform.buildRustPackage rec {
       withMkl = lib.optionalAttrs (stdenv.hostPlatform == "x86_64-linux") (
         mistral-rs.override { acceleration = "mkl"; }
       );
-      withCuda = lib.optionalAttrs stdenv.isLinux (mistral-rs.override { acceleration = "cuda"; });
+      withCuda = lib.optionalAttrs stdenv.hostPlatform.isLinux (mistral-rs.override { acceleration = "cuda"; });
       withMetal = lib.optionalAttrs (stdenv.hostPlatform == "aarch64-darwin") (
         mistral-rs.override { acceleration = "metal"; }
       );
diff --git a/pkgs/by-name/ml/mlx42/package.nix b/pkgs/by-name/ml/mlx42/package.nix
index 1f485d42aab9..9c22c20144d9 100644
--- a/pkgs/by-name/ml/mlx42/package.nix
+++ b/pkgs/by-name/ml/mlx42/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ glfw ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ OpenGL Cocoa IOKit ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ OpenGL Cocoa IOKit ]);
 
   cmakeFlags = [ "-DDEBUG=${toString enableDebug}" ];
 
diff --git a/pkgs/by-name/mo/modrinth-app-unwrapped/package.nix b/pkgs/by-name/mo/modrinth-app-unwrapped/package.nix
index 46874c6b7b77..ca32e25fb03a 100644
--- a/pkgs/by-name/mo/modrinth-app-unwrapped/package.nix
+++ b/pkgs/by-name/mo/modrinth-app-unwrapped/package.nix
@@ -85,11 +85,11 @@ rustPlatform.buildRustPackage {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       libsoup
       webkitgtk
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AppKit
@@ -149,13 +149,13 @@ rustPlatform.buildRustPackage {
     ''
       runHook preInstall
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p "$out"/bin
       cp -r target/release/bundle/macos "$out"/Applications
       mv "$out"/Applications/Modrinth\ App.app/Contents/MacOS/Modrinth\ App "$out"/bin/modrinth-app
       ln -s "$out"/bin/modrinth-app "$out"/Applications/Modrinth\ App.app/Contents/MacOS/Modrinth\ App
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       cp -r target/release/bundle/"$tauriBundle"/*/data/usr "$out"
       desktop-file-edit \
         --set-comment "Modrinth's game launcher" \
@@ -189,6 +189,6 @@ rustPlatform.buildRustPackage {
     maintainers = with lib.maintainers; [ getchoo ];
     platforms = lib.platforms.linux ++ lib.platforms.darwin;
     # this builds on architectures like aarch64, but the launcher itself does not support them yet
-    broken = !stdenv.isx86_64;
+    broken = !stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/by-name/mo/modrinth-app/package.nix b/pkgs/by-name/mo/modrinth-app/package.nix
index 12e13017ad33..c92b6319d5a5 100644
--- a/pkgs/by-name/mo/modrinth-app/package.nix
+++ b/pkgs/by-name/mo/modrinth-app/package.nix
@@ -37,7 +37,7 @@ symlinkJoin rec {
     wrapGAppsHook3
   ];
 
-  runtimeDependencies = lib.optionalString stdenv.isLinux (lib.makeLibraryPath [
+  runtimeDependencies = lib.optionalString stdenv.hostPlatform.isLinux (lib.makeLibraryPath [
     addDriverRunpath.driverLink
     flite # narrator support
 
@@ -57,7 +57,7 @@ symlinkJoin rec {
   postBuild = ''
     gappsWrapperArgs+=(
       --prefix PATH : ${lib.makeSearchPath "bin/java" jdks}
-      ${lib.optionalString stdenv.isLinux ''
+      ${lib.optionalString stdenv.hostPlatform.isLinux ''
         --prefix PATH : ${lib.makeBinPath [xorg.xrandr]}
         --set LD_LIBRARY_PATH $runtimeDependencies
       ''}
diff --git a/pkgs/by-name/mo/mold/package.nix b/pkgs/by-name/mo/mold/package.nix
index 383abc8f77b8..dbd6fbd6a2a4 100644
--- a/pkgs/by-name/mo/mold/package.nix
+++ b/pkgs/by-name/mo/mold/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     tbb
     zlib
     zstd
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     mimalloc
   ];
 
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     "-DMOLD_USE_SYSTEM_TBB:BOOL=ON"
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-faligned-allocation"
   ]);
 
@@ -91,7 +91,7 @@ stdenv.mkDerivation rec {
       in
       {
         version = testers.testVersion { package = mold; };
-      } // lib.optionalAttrs stdenv.isLinux {
+      } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
         adapter-gcc = helloTest "adapter-gcc" (hello.override (old: { stdenv = useMoldLinker gccStdenv; }));
         adapter-llvm = helloTest "adapter-llvm" (hello.override (old: { stdenv = useMoldLinker clangStdenv; }));
         wrapped = helloTest "wrapped" (hello.overrideAttrs (previousAttrs: {
diff --git a/pkgs/by-name/mo/mollysocket/package.nix b/pkgs/by-name/mo/mollysocket/package.nix
index c5772f2edc4b..6c9e18cc8f15 100644
--- a/pkgs/by-name/mo/mollysocket/package.nix
+++ b/pkgs/by-name/mo/mollysocket/package.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/mo/mongodb-ce/package.nix b/pkgs/by-name/mo/mongodb-ce/package.nix
index d3dc490bdcfe..a7ee195c9874 100644
--- a/pkgs/by-name/mo/mongodb-ce/package.nix
+++ b/pkgs/by-name/mo/mongodb-ce/package.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
       or (throw "unsupported system: ${stdenv.hostPlatform.system}")
   );
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
   dontStrip = true;
 
   buildInputs = [
diff --git a/pkgs/by-name/mo/moonlight-qt/package.nix b/pkgs/by-name/mo/moonlight-qt/package.nix
index a0ca66b61e64..62a3b556a3a3 100644
--- a/pkgs/by-name/mo/moonlight-qt/package.nix
+++ b/pkgs/by-name/mo/moonlight-qt/package.nix
@@ -32,7 +32,7 @@ let
     Cocoa
     VideoToolbox
     ;
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 
 stdenv'.mkDerivation rec {
@@ -64,7 +64,7 @@ stdenv'.mkDerivation rec {
 
   buildInputs =
     [
-      (SDL2.override { drmSupport = stdenv.isLinux; })
+      (SDL2.override { drmSupport = stdenv.hostPlatform.isLinux; })
       SDL2_ttf
       ffmpeg
       libopus
@@ -73,7 +73,7 @@ stdenv'.mkDerivation rec {
       qt6.qtsvg
       openssl
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
       libpulseaudio
       libva
@@ -83,7 +83,7 @@ stdenv'.mkDerivation rec {
       wayland
       libdrm
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       AVFoundation
       AppKit
       AudioUnit
@@ -93,7 +93,7 @@ stdenv'.mkDerivation rec {
 
   qmakeFlags = [ "CONFIG+=disable-prebuilts" ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications $out/bin
     mv app/Moonlight.app $out/Applications
     ln -s $out/Applications/Moonlight.app/Contents/MacOS/Moonlight $out/bin/moonlight
diff --git a/pkgs/by-name/mp/mpris-notifier/package.nix b/pkgs/by-name/mp/mpris-notifier/package.nix
index bf8bac180fc7..3b3016a1d248 100644
--- a/pkgs/by-name/mp/mpris-notifier/package.nix
+++ b/pkgs/by-name/mp/mpris-notifier/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-f8BCnjgv7OLWQ/2X3dTUuAarCl+u+4CRARSQsO+09zE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/mq/mqtt-explorer/package.nix b/pkgs/by-name/mq/mqtt-explorer/package.nix
index dec432204622..2aa7a6ba6891 100644
--- a/pkgs/by-name/mq/mqtt-explorer/package.nix
+++ b/pkgs/by-name/mq/mqtt-explorer/package.nix
@@ -51,13 +51,13 @@ stdenv.mkDerivation rec {
     typescript
     fixup-yarn-lock
     makeWrapper
-  ] ++ lib.optionals (!stdenv.isDarwin) [ copyDesktopItems ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ copyDesktopItems ];
 
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
 
   # disable code signing on macos
   # https://github.com/electron-userland/electron-builder/blob/77f977435c99247d5db395895618b150f5006e8f/docs/code-signing.md#how-to-disable-code-signing-during-the-build-process-on-macos
-  postConfigure = lib.optionalString stdenv.isDarwin ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export CSC_IDENTITY_AUTO_DISCOVERY=false
   '';
 
@@ -106,7 +106,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     runHook preInstall
 
-    ${lib.optionalString (!stdenv.isDarwin) ''
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       mkdir -p "$out/share/mqtt-explorer"/{app,icons/hicolor}
 
       cp -r build/*-unpacked/{locales,resources{,.pak}} "$out/share/mqtt-explorer/app"
@@ -128,7 +128,7 @@ stdenv.mkDerivation rec {
         --inherit-argv0
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/{Applications,bin}
       mv "build/mac/MQTT Explorer.app" $out/Applications
 
diff --git a/pkgs/by-name/mq/mqttui/package.nix b/pkgs/by-name/mq/mqttui/package.nix
index e4bbd4974f31..d2617f51e1dd 100644
--- a/pkgs/by-name/mq/mqttui/package.nix
+++ b/pkgs/by-name/mq/mqttui/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     ln -sf ${./Cargo.lock} Cargo.lock
   '';
 
-  buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
   meta = with lib; {
     description = "Terminal client for MQTT";
diff --git a/pkgs/by-name/mu/mujoco/package.nix b/pkgs/by-name/mu/mujoco/package.nix
index 416de20426cf..291fe8e546cd 100644
--- a/pkgs/by-name/mu/mujoco/package.nix
+++ b/pkgs/by-name/mu/mujoco/package.nix
@@ -191,6 +191,6 @@ stdenv.mkDerivation rec {
       samuela
       tmplt
     ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/mu/mullvad-browser/package.nix b/pkgs/by-name/mu/mullvad-browser/package.nix
index 42cb084e0588..b4662af7b598 100644
--- a/pkgs/by-name/mu/mullvad-browser/package.nix
+++ b/pkgs/by-name/mu/mullvad-browser/package.nix
@@ -29,10 +29,10 @@
 , pciutils
 , zlib
 
-, libnotifySupport ? stdenv.isLinux
+, libnotifySupport ? stdenv.hostPlatform.isLinux
 , libnotify
 
-, waylandSupport ? stdenv.isLinux
+, waylandSupport ? stdenv.hostPlatform.isLinux
 , libxkbcommon
 , libdrm
 , libGL
diff --git a/pkgs/by-name/mu/mumps/package.nix b/pkgs/by-name/mu/mumps/package.nix
index 17c005946f57..7d0e3e154cb4 100644
--- a/pkgs/by-name/mu/mumps/package.nix
+++ b/pkgs/by-name/mu/mumps/package.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
       # https://github.com/coin-or-tools/ThirdParty-Mumps/blob/stable/3.0/get.Mumps#L66
       cp libseq/mpi.h libseq/mumps_mpi.h
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace src/Makefile --replace-fail \
         "-Wl,\''$(SONAME),libmumps_common" \
         "-Wl,-install_name,$out/lib/libmumps_common"
@@ -43,7 +43,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   makeFlags =
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       "SONAME="
       "LIBEXT_SHARED=.dylib"
     ]
@@ -73,7 +73,7 @@ stdenv.mkDerivation (finalAttrs: {
     scotch
   ];
 
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool \
       -change    libmpiseq.dylib \
         $out/lib/libmpiseq.dylib \
diff --git a/pkgs/by-name/mu/muon/package.nix b/pkgs/by-name/mu/muon/package.nix
index a479dd23d29b..0e38f4f8e993 100644
--- a/pkgs/by-name/mu/muon/package.nix
+++ b/pkgs/by-name/mu/muon/package.nix
@@ -129,7 +129,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # typical `ar failure`
+    broken = stdenv.hostPlatform.isDarwin; # typical `ar failure`
     mainProgram = "muon";
   };
 })
diff --git a/pkgs/by-name/mu/music-player/package.nix b/pkgs/by-name/mu/music-player/package.nix
index 776486e6928c..2f2a54d36fca 100644
--- a/pkgs/by-name/mu/music-player/package.nix
+++ b/pkgs/by-name/mu/music-player/package.nix
@@ -28,15 +28,15 @@ rustPlatform.buildRustPackage rec {
       protobuf
       rustPlatform.bindgenHook
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       pkg-config
     ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AudioUnit
     ];
 
diff --git a/pkgs/by-name/mu/musikcube/package.nix b/pkgs/by-name/mu/musikcube/package.nix
index 8eb5536f39ba..8c59e9833985 100644
--- a/pkgs/by-name/mu/musikcube/package.nix
+++ b/pkgs/by-name/mu/musikcube/package.nix
@@ -72,11 +72,11 @@ stdenv.mkDerivation (finalAttrs: {
       taglib
     ]
     ++ lib.optionals systemdSupport [ systemd ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
       pulseaudio
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Cocoa
@@ -89,7 +89,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   cmakeFlags = [ "-DDISABLE_STRIP=true" ];
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath $out/share/musikcube $out/share/musikcube/musikcube
     install_name_tool -add_rpath $out/share/musikcube $out/share/musikcube/musikcubed
   '';
diff --git a/pkgs/by-name/my/mycelium/package.nix b/pkgs/by-name/my/mycelium/package.nix
index 266448a438eb..2669ff84d923 100644
--- a/pkgs/by-name/my/mycelium/package.nix
+++ b/pkgs/by-name/my/mycelium/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ versionCheckHook ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/my/mysql84/package.nix b/pkgs/by-name/my/mysql84/package.nix
index b245404420d7..1c4d655efd4b 100644
--- a/pkgs/by-name/my/mysql84/package.nix
+++ b/pkgs/by-name/my/mysql84/package.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ bison cmake pkg-config ]
-    ++ lib.optionals (!stdenv.isDarwin) [ rpcsvc-proto ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ rpcsvc-proto ];
 
   patches = [
     ./no-force-outline-atomics.patch # Do not force compilers to turn on -moutline-atomics switch
@@ -28,9 +28,9 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     (curl.override { inherit openssl; }) icu libedit libevent lz4 ncurses openssl protobuf_21 re2 readline zlib
     zstd libfido2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     numactl libtirpc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools darwin.apple_sdk.frameworks.CoreServices darwin.developer_cmds darwin.DarwinTools
   ];
 
diff --git a/pkgs/by-name/n8/n8n/package.nix b/pkgs/by-name/n8/n8n/package.nix
index a95b3199b69b..0a57d8818d15 100644
--- a/pkgs/by-name/n8/n8n/package.nix
+++ b/pkgs/by-name/n8/n8n/package.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation (finalAttrs: {
     node-gyp # required to build sqlite3 bindings
     cacert # required for rustls-native-certs (dependency of turbo build tool)
     makeWrapper
-  ] ++ lib.optional stdenv.isDarwin [ xcbuild ];
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   buildInputs = [
     nodejs
diff --git a/pkgs/by-name/na/naja/package.nix b/pkgs/by-name/na/naja/package.nix
index ba20cacf8d0c..a342c091f708 100644
--- a/pkgs/by-name/na/naja/package.nix
+++ b/pkgs/by-name/na/naja/package.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation {
       (lib.cmakeBool "CPPTRACE_USE_EXTERNAL_LIBDWARF" true)
       (lib.cmakeBool "CPPTRACE_USE_EXTERNAL_ZSTD" true)
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       (lib.cmakeFeature "CMAKE_OSX_DEPLOYMENT_TARGET" "10.14") # For aligned allocation
     ];
 
diff --git a/pkgs/by-name/na/naps2/package.nix b/pkgs/by-name/na/naps2/package.nix
index 728445a1da2e..93161f889efd 100644
--- a/pkgs/by-name/na/naps2/package.nix
+++ b/pkgs/by-name/na/naps2/package.nix
@@ -55,7 +55,7 @@ buildDotnetModule rec {
     maintainers = with lib.maintainers; [ eliandoran ];
     platforms = lib.platforms.linux;
     mainProgram = "naps2";
-    broken = stdenv.isAarch64;  # Google.Protobuf.Tools dependency fails to build.
+    broken = stdenv.hostPlatform.isAarch64;  # Google.Protobuf.Tools dependency fails to build.
   };
 
 }
diff --git a/pkgs/by-name/na/navidrome/package.nix b/pkgs/by-name/na/navidrome/package.nix
index 971471041b69..112523e1fb74 100644
--- a/pkgs/by-name/na/navidrome/package.nix
+++ b/pkgs/by-name/na/navidrome/package.nix
@@ -82,6 +82,6 @@ buildGoModule rec {
     sourceProvenance = with lib.sourceTypes; [ fromSource ];
     maintainers = with lib.maintainers; [ aciceri squalus ];
     # Broken on Darwin: sandbox-exec: pattern serialization length exceeds maximum (NixOS/nix#4119)
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ne/neovide/package.nix b/pkgs/by-name/ne/neovide/package.nix
index 232bc4664eea..dc49789cf5df 100644
--- a/pkgs/by-name/ne/neovide/package.nix
+++ b/pkgs/by-name/ne/neovide/package.nix
@@ -20,7 +20,7 @@
 , darwin
 , libglvnd
 , libxkbcommon
-, enableWayland ? stdenv.isLinux
+, enableWayland ? stdenv.hostPlatform.isLinux
 , wayland
 }:
 
@@ -66,7 +66,7 @@ rustPlatform.buildRustPackage.override { stdenv = clangStdenv; } rec {
     pkg-config
     python3 # skia
     removeReferencesTo
-  ] ++ lib.optionals stdenv.isDarwin [ xcbuild ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   nativeCheckInputs = [ neovim ];
 
@@ -74,7 +74,7 @@ rustPlatform.buildRustPackage.override { stdenv = clangStdenv; } rec {
     SDL2
     fontconfig
     rustPlatform.bindgenHook
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
@@ -96,11 +96,11 @@ rustPlatform.buildRustPackage.override { stdenv = clangStdenv; } rec {
         --prefix LD_LIBRARY_PATH : ${libPath}
     '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -r extra/osx/Neovide.app $out/Applications
     ln -s $out/bin $out/Applications/Neovide.app/Contents/MacOS
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     for n in 16x16 32x32 48x48 256x256; do
       install -m444 -D "assets/neovide-$n.png" \
         "$out/share/icons/hicolor/$n/apps/neovide.png"
diff --git a/pkgs/by-name/ne/neovim-qt/package.nix b/pkgs/by-name/ne/neovim-qt/package.nix
index aa7b2607fb70..6251559eba27 100644
--- a/pkgs/by-name/ne/neovim-qt/package.nix
+++ b/pkgs/by-name/ne/neovim-qt/package.nix
@@ -6,7 +6,7 @@ in
 libsForQt5.mkDerivation {
   pname = "neovim-qt";
   version = unwrapped.version;
-  buildCommand = if stdenv.isDarwin then ''
+  buildCommand = if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
     cp -r ${unwrapped}/bin/nvim-qt.app $out/Applications
 
diff --git a/pkgs/by-name/ne/neovim-remote/package.nix b/pkgs/by-name/ne/neovim-remote/package.nix
index ffb686abc8f1..e0f88180542f 100644
--- a/pkgs/by-name/ne/neovim-remote/package.nix
+++ b/pkgs/by-name/ne/neovim-remote/package.nix
@@ -35,7 +35,7 @@ with python3.pkgs; buildPythonApplication rec {
     pytestCheckHook
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     export HOME="$(mktemp -d)"
diff --git a/pkgs/by-name/ne/neovim-unwrapped/package.nix b/pkgs/by-name/ne/neovim-unwrapped/package.nix
index c66597da3ae8..b37ba7fd2d94 100644
--- a/pkgs/by-name/ne/neovim-unwrapped/package.nix
+++ b/pkgs/by-name/ne/neovim-unwrapped/package.nix
@@ -16,7 +16,7 @@
 }:
 stdenv.mkDerivation (finalAttrs:
   let
-  nvim-lpeg-dylib = luapkgs: if stdenv.isDarwin
+  nvim-lpeg-dylib = luapkgs: if stdenv.hostPlatform.isDarwin
     then (luapkgs.lpeg.overrideAttrs (oa: {
       preConfigure = ''
         # neovim wants clang .dylib
@@ -33,7 +33,7 @@ stdenv.mkDerivation (finalAttrs:
       nativeBuildInputs =
         oa.nativeBuildInputs
         ++ (
-          lib.optional stdenv.isDarwin fixDarwinDylibNames
+          lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames
         );
     }))
     else luapkgs.lpeg;
@@ -104,7 +104,7 @@ in {
       neovimLuaEnv
       tree-sitter
       unibilium
-    ] ++ lib.optionals stdenv.isDarwin [ libiconv CoreServices ]
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv CoreServices ]
       ++ lib.optionals finalAttrs.finalPackage.doCheck [ glibcLocales procps ]
     ;
 
@@ -168,7 +168,7 @@ in {
       "-DLUA_PRG=${neovimLuaEnvOnBuild}/bin/luajit"
     ];
 
-    preConfigure = lib.optionalString stdenv.isDarwin ''
+    preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace src/nvim/CMakeLists.txt --replace "    util" ""
     '' + ''
       mkdir -p $out/lib/nvim/parser
diff --git a/pkgs/by-name/ne/netclient/package.nix b/pkgs/by-name/ne/netclient/package.nix
index 9634c2b07a80..5ac4e9f7a451 100644
--- a/pkgs/by-name/ne/netclient/package.nix
+++ b/pkgs/by-name/ne/netclient/package.nix
@@ -19,8 +19,8 @@ buildGoModule rec {
 
   vendorHash = "sha256-DzTTESPxYuZYNGjEG3PufLoS02+R9275arVcUzImpBU=";
 
-  buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Cocoa
-    ++ lib.optional stdenv.isLinux libX11;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Cocoa
+    ++ lib.optional stdenv.hostPlatform.isLinux libX11;
 
   hardeningEnabled = [ "pie" ];
 
diff --git a/pkgs/by-name/ne/neverest/package.nix b/pkgs/by-name/ne/neverest/package.nix
index 9b51e9715906..5c4bd81fa83c 100644
--- a/pkgs/by-name/ne/neverest/package.nix
+++ b/pkgs/by-name/ne/neverest/package.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
     ++ lib.optional (installManPages || installShellCompletions) installShellFiles;
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit Cocoa Security ])
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit Cocoa Security ])
     ++ lib.optional (builtins.elem "notmuch" buildFeatures) notmuch;
 
   # TODO: unit tests temporarily broken, remove this line for the next
diff --git a/pkgs/by-name/ne/nextpnr/package.nix b/pkgs/by-name/ne/nextpnr/package.nix
index b6b2eb07bdc1..b6a3b6974d74 100644
--- a/pkgs/by-name/ne/nextpnr/package.nix
+++ b/pkgs/by-name/ne/nextpnr/package.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
       "-DHIMBAECHEL_GOWIN_DEVICES=all"
     ]
     ++ (lib.optional enableGui "-DBUILD_GUI=ON")
-    ++ (lib.optional (enableGui && stdenv.isDarwin)
+    ++ (lib.optional (enableGui && stdenv.hostPlatform.isDarwin)
         "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks");
 
   patchPhase = with builtins; ''
diff --git a/pkgs/by-name/ng/ngrok/package.nix b/pkgs/by-name/ng/ngrok/package.nix
index daf9da5c8f2f..bb47cd4d7367 100644
--- a/pkgs/by-name/ng/ngrok/package.nix
+++ b/pkgs/by-name/ng/ngrok/package.nix
@@ -7,20 +7,20 @@
 let
   versions = lib.importJSON ./versions.json;
   arch =
-    if stdenv.isi686 then
+    if stdenv.hostPlatform.isi686 then
       "386"
-    else if stdenv.isx86_64 then
+    else if stdenv.hostPlatform.isx86_64 then
       "amd64"
-    else if stdenv.isAarch32 then
+    else if stdenv.hostPlatform.isAarch32 then
       "arm"
-    else if stdenv.isAarch64 then
+    else if stdenv.hostPlatform.isAarch64 then
       "arm64"
     else
       throw "Unsupported architecture";
   os =
-    if stdenv.isLinux then
+    if stdenv.hostPlatform.isLinux then
       "linux"
-    else if stdenv.isDarwin then
+    else if stdenv.hostPlatform.isDarwin then
       "darwin"
     else
       throw "Unsupported os";
@@ -58,7 +58,7 @@ stdenv.mkDerivation {
   passthru.updateScript = ./update.sh;
 
   # Stripping causes SEGFAULT on darwin
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   meta = {
     description = "Allows you to expose a web server running on your local machine to the internet";
diff --git a/pkgs/by-name/nh/nh/package.nix b/pkgs/by-name/nh/nh/package.nix
index 0d2ad0a0d338..58a9f84b07cf 100644
--- a/pkgs/by-name/nh/nh/package.nix
+++ b/pkgs/by-name/nh/nh/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage {
     makeBinaryWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   preFixup = ''
     mkdir completions
diff --git a/pkgs/by-name/ni/nicstat/package.nix b/pkgs/by-name/ni/nicstat/package.nix
index d8da45a6082c..1e1e346b822b 100644
--- a/pkgs/by-name/ni/nicstat/package.nix
+++ b/pkgs/by-name/ni/nicstat/package.nix
@@ -44,6 +44,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ juliusrickert ];
     mainProgram = "nicstat";
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ni/nix-btm/package.nix b/pkgs/by-name/ni/nix-btm/package.nix
index 42496a5bff03..a7d94b4863b5 100644
--- a/pkgs/by-name/ni/nix-btm/package.nix
+++ b/pkgs/by-name/ni/nix-btm/package.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-qUZ3zJjQrteFQerBKFH/+Ys0uOzvI7DH9rCaVtseJMM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin
     (with darwin.apple_sdk.frameworks; [ CoreServices SystemConfiguration ]);
 
   meta = with lib; {
diff --git a/pkgs/by-name/ni/nix-health/package.nix b/pkgs/by-name/ni/nix-health/package.nix
index 3cb4fc881c7b..2081714d50a9 100644
--- a/pkgs/by-name/ni/nix-health/package.nix
+++ b/pkgs/by-name/ni/nix-health/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [ libiconv openssl ]
     # Use a newer SDK for CoreFoundation, because the sysinfo crate requires
     # it, https://github.com/GuillaumeGomez/sysinfo/issues/915
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks;
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks;
       [ IOKit
         CoreFoundation
       ]);
diff --git a/pkgs/by-name/ni/nix-top/package.nix b/pkgs/by-name/ni/nix-top/package.nix
index 55170ec40896..fa69693781e0 100644
--- a/pkgs/by-name/ni/nix-top/package.nix
+++ b/pkgs/by-name/ni/nix-top/package.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
       wrapProgram $out/bin/nix-top \
         --prefix PATH : "$out/libexec/nix-top:${additionalPath}"
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       ln -s /bin/stty $out/libexec/nix-top
     ''
     + ''
diff --git a/pkgs/by-name/ni/nix-weather/package.nix b/pkgs/by-name/ni/nix-weather/package.nix
index ea552ca9e4f4..02f31ee19739 100644
--- a/pkgs/by-name/ni/nix-weather/package.nix
+++ b/pkgs/by-name/ni/nix-weather/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
       openssl
       installShellFiles
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/ni/nix-web/package.nix b/pkgs/by-name/ni/nix-web/package.nix
index ad97b1356b3e..21d6c9f15d0c 100644
--- a/pkgs/by-name/ni/nix-web/package.nix
+++ b/pkgs/by-name/ni/nix-web/package.nix
@@ -26,8 +26,8 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-romL/RALr/pmwUA8/SN4AOwc+Vndspd1Yrqs0AHPYRY=";
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = lib.optional (!stdenv.isDarwin) openssl
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
+  buildInputs = lib.optional (!stdenv.hostPlatform.isDarwin) openssl
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
 
   postPatch = ''
     substituteInPlace nix-web/nix-web.service \
diff --git a/pkgs/by-name/ni/nixtract/package.nix b/pkgs/by-name/ni/nixtract/package.nix
index e046e49d84f4..2885a13f300d 100644
--- a/pkgs/by-name/ni/nixtract/package.nix
+++ b/pkgs/by-name/ni/nixtract/package.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/by-name/nm/nmap/package.nix b/pkgs/by-name/nm/nmap/package.nix
index 666f6bd84ecc..e90fc8ec322e 100644
--- a/pkgs/by-name/nm/nmap/package.nix
+++ b/pkgs/by-name/nm/nmap/package.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-4Uq1MOR7Wv2I8ciiusf4nNj+a0eOItJVxbm923ocV3g=";
   };
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace libz/configure \
         --replace /usr/bin/libtool ar \
         --replace 'AR="libtool"' 'AR="ar"' \
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     install -m 444 -D nselib/data/passwords.lst $out/share/wordlists/nmap.lst
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change liblinear.so.5 ${liblinear.out}/lib/liblinear.5.dylib $out/bin/nmap
   '';
 
diff --git a/pkgs/by-name/nn/nncp/package.nix b/pkgs/by-name/nn/nncp/package.nix
index 13c4c4812b92..bbacef76fbb0 100644
--- a/pkgs/by-name/nn/nncp/package.nix
+++ b/pkgs/by-name/nn/nncp/package.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     changelog = "http://www.nncpgo.org/News.html";
     description = "Secure UUCP-like store-and-forward exchanging";
     downloadPage = "http://www.nncpgo.org/Tarballs.html";
diff --git a/pkgs/by-name/no/nomacs/package.nix b/pkgs/by-name/no/nomacs/package.nix
index a5f17f4b365b..45333177d070 100644
--- a/pkgs/by-name/no/nomacs/package.nix
+++ b/pkgs/by-name/no/nomacs/package.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs = [ "out" ]
     # man pages are not installed on Darwin, see cmake/{Mac,Unix}BuildTarget.cmake
-    ++ lib.optionals (!stdenv.isDarwin) [ "man" ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ "man" ];
 
   sourceRoot = "${finalAttrs.src.name}/ImageLounge";
 
@@ -60,7 +60,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "USE_SYSTEM_QUAZIP" true)
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,lib}
     mv $out/nomacs.app $out/Applications/nomacs.app
     mv $out/libnomacsCore.dylib $out/lib/libnomacsCore.dylib
diff --git a/pkgs/by-name/no/normcap/package.nix b/pkgs/by-name/no/normcap/package.nix
index e862247b0df5..a93db6de0279 100644
--- a/pkgs/by-name/no/normcap/package.nix
+++ b/pkgs/by-name/no/normcap/package.nix
@@ -17,7 +17,7 @@ let
     leptonica
     tesseract4
     libnotify
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wl-clipboard
   ];
 
@@ -73,21 +73,21 @@ ps.buildPythonApplication rec {
     ps.pytestCheckHook
     ps.pytest-qt
     ps.toml
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     ps.pytest-xvfb
     xorg.xvfb
   ];
 
   preCheck = ''
     export HOME=$(mktemp -d)
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     # setup a virtual x11 display
     export DISPLAY=:$((2000 + $RANDOM % 1000))
     Xvfb $DISPLAY -screen 5 1024x768x8 &
     xvfb_pid=$!
   '';
 
-  postCheck = lib.optionalString stdenv.isLinux ''
+  postCheck = lib.optionalString stdenv.hostPlatform.isLinux ''
     # cleanup the virtual x11 display
     sleep 0.5
     kill $xvfb_pid
@@ -106,7 +106,7 @@ ps.buildPythonApplication rec {
     "test_synchronized_capture"
     # flaky
     "test_normcap_ocr_testcases"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # requires impure pbcopy
     "test_get_copy_func_with_pbcopy"
     "test_get_copy_func_without_pbcopy"
@@ -128,7 +128,7 @@ ps.buildPythonApplication rec {
     # RuntimeError("Internal C++ object (PySide6.QtGui.QHideEvent) already deleted.")
     # AttributeError("'LoadingIndicator' object has no attribute 'timer'")
     "tests/tests_gui/test_loading_indicator.py"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # requires a display
     "tests/integration/test_normcap.py"
     "tests/integration/test_tray_menu.py"
@@ -142,6 +142,6 @@ ps.buildPythonApplication rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ cafkafk pbsds ];
     mainProgram = "normcap";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/no/nosql-workbench/package.nix b/pkgs/by-name/no/nosql-workbench/package.nix
index bc9532c58d94..d3d3d4c4f4b9 100644
--- a/pkgs/by-name/no/nosql-workbench/package.nix
+++ b/pkgs/by-name/no/nosql-workbench/package.nix
@@ -41,7 +41,7 @@ let
     ];
   };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation {
     inherit
       pname
diff --git a/pkgs/by-name/no/nostui/package.nix b/pkgs/by-name/no/nostui/package.nix
index 6fbd71ac2d05..9c4f32004849 100644
--- a/pkgs/by-name/no/nostui/package.nix
+++ b/pkgs/by-name/no/nostui/package.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-RCD11KdzM66Mkydc51r6fG+q8bmKl5eZma58YoARwPo=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk; [ frameworks.SystemConfiguration ]
   );
 
diff --git a/pkgs/by-name/no/notes/package.nix b/pkgs/by-name/no/notes/package.nix
index c9ca49ffe745..83af624af20c 100644
--- a/pkgs/by-name/no/notes/package.nix
+++ b/pkgs/by-name/no/notes/package.nix
@@ -8,7 +8,7 @@
   overrideSDK,
 }:
 let
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   pname = "notes";
@@ -34,11 +34,11 @@ stdenv'.mkDerivation (finalAttrs: {
       qt6.qtbase
       qt6.qtdeclarative
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.Cocoa
     ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications
     mv $out/bin/Notes.app $out/Applications
   '';
diff --git a/pkgs/by-name/no/novelwriter/package.nix b/pkgs/by-name/no/novelwriter/package.nix
index 9bf21b216aa0..f33aa1b03a42 100644
--- a/pkgs/by-name/no/novelwriter/package.nix
+++ b/pkgs/by-name/no/novelwriter/package.nix
@@ -36,7 +36,7 @@ python3.pkgs.buildPythonApplication {
     export QT_QPA_PLATFORM_PLUGIN_PATH=${qt5.qtbase.bin}/lib/qt-${qt5.qtbase.version}/plugins/platforms
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/share/{icons,applications,pixmaps,mime/packages}
 
     cp -r setup/data/hicolor $out/share/icons
@@ -68,6 +68,6 @@ python3.pkgs.buildPythonApplication {
     mainProgram = "novelwriter";
 
     platforms = with lib.platforms; unix ++ windows;
-    broken = stdenv.isDarwin; # TODO awaiting build instructions for Darwin
+    broken = stdenv.hostPlatform.isDarwin; # TODO awaiting build instructions for Darwin
   };
 }
diff --git a/pkgs/by-name/no/novops/package.nix b/pkgs/by-name/no/novops/package.nix
index a254f734178a..44edb7f32953 100644
--- a/pkgs/by-name/no/novops/package.nix
+++ b/pkgs/by-name/no/novops/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl # required for openssl-sys
-  ] ++ lib.optional stdenv.isDarwin [
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/nr/nrr/package.nix b/pkgs/by-name/nr/nrr/package.nix
index 0cf4c2bb0b1f..0c7aa77aca1d 100644
--- a/pkgs/by-name/nr/nrr/package.nix
+++ b/pkgs/by-name/nr/nrr/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-F2JlUErplSRQwSAEavQPNDMcXYc2waeYwjGuzmZq8sc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.IOKit
diff --git a/pkgs/by-name/ns/nsxiv/package.nix b/pkgs/by-name/ns/nsxiv/package.nix
index ba267571a900..b54c8ce55f4e 100644
--- a/pkgs/by-name/ns/nsxiv/package.nix
+++ b/pkgs/by-name/ns/nsxiv/package.nix
@@ -30,13 +30,13 @@ stdenv.mkDerivation (finalAttrs: {
     libXft
     libexif
     libwebp
-  ] ++ lib.optional stdenv.isDarwin libinotify-kqueue;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin libinotify-kqueue;
 
   postPatch = lib.optionalString (conf != null) ''
     cp ${(builtins.toFile "config.def.h" conf)} config.def.h
   '';
 
-  env.NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-linotify";
+  env.NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-linotify";
 
   makeFlags = [ "CC:=$(CC)" ];
 
diff --git a/pkgs/by-name/nt/ntpd-rs/package.nix b/pkgs/by-name/nt/ntpd-rs/package.nix
index 43df56ac024e..bc385466c8eb 100644
--- a/pkgs/by-name/nt/ntpd-rs/package.nix
+++ b/pkgs/by-name/nt/ntpd-rs/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-9HLbGC6j0Wq/lG//CeEAfnYzlGG14CnDpmluL1moHWQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk_11_0.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk_11_0.frameworks.Security ];
   nativeBuildInputs = [
     pandoc
     installShellFiles
@@ -60,7 +60,7 @@ rustPlatform.buildRustPackage rec {
 
   passthru = {
     tests = {
-      nixos = lib.optionalAttrs stdenv.isLinux nixosTests.ntpd-rs;
+      nixos = lib.optionalAttrs stdenv.hostPlatform.isLinux nixosTests.ntpd-rs;
       version = testers.testVersion {
         package = ntpd-rs;
         inherit version;
@@ -84,6 +84,6 @@ rustPlatform.buildRustPackage rec {
     ];
     mainProgram = "ntp-ctl";
     # note: Undefined symbols for architecture x86_64: "_ntp_adjtime"
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/by-name/nu/nulloy/package.nix b/pkgs/by-name/nu/nulloy/package.nix
index 8e82b6ae0638..203ddf84c409 100644
--- a/pkgs/by-name/nu/nulloy/package.nix
+++ b/pkgs/by-name/nu/nulloy/package.nix
@@ -61,6 +61,6 @@ stdenv.mkDerivation rec {
     mainProgram = "nulloy";
     maintainers = with maintainers; [ aleksana ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/nu/numbat/package.nix b/pkgs/by-name/nu/numbat/package.nix
index 829b1bf8a4a4..ce3c954b88c2 100644
--- a/pkgs/by-name/nu/numbat/package.nix
+++ b/pkgs/by-name/nu/numbat/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-t6vxJ0UIQJILCGv4PO5V4/QF5de/wtMQDkb8gPtE70E=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/nv/nvidia-texture-tools/package.nix b/pkgs/by-name/nv/nvidia-texture-tools/package.nix
index 3f2bd5ad36a3..13f285bc66e8 100644
--- a/pkgs/by-name/nv/nvidia-texture-tools/package.nix
+++ b/pkgs/by-name/nv/nvidia-texture-tools/package.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
     # Make a recently added pure virtual function just virtual,
     # to keep compatibility.
     sed -i 's/virtual void endImage() = 0;/virtual void endImage() {}/' src/nvtt/nvtt.h
-  '' + lib.optionalString stdenv.isAarch64 ''
+  '' + lib.optionalString stdenv.hostPlatform.isAarch64 ''
     # remove x86_64-only libraries
     sed -i '/bc1enc/d' src/nvtt/tests/CMakeLists.txt
     sed -i '/libsquish/d;/CMP_Core/d' extern/CMakeLists.txt
diff --git a/pkgs/by-name/nw/nwjs-ffmpeg-prebuilt/package.nix b/pkgs/by-name/nw/nwjs-ffmpeg-prebuilt/package.nix
index e0d721fd352e..6acad5ed2c12 100644
--- a/pkgs/by-name/nw/nwjs-ffmpeg-prebuilt/package.nix
+++ b/pkgs/by-name/nw/nwjs-ffmpeg-prebuilt/package.nix
@@ -6,7 +6,7 @@
 }:
 
 let
-  bits = if stdenv.is64bit then "x64" else "ia32";
+  bits = if stdenv.hostPlatform.is64bit then "x64" else "ia32";
   version = "0.91.0";
 in
 stdenv.mkDerivation {
diff --git a/pkgs/by-name/oa/oauth2l/package.nix b/pkgs/by-name/oa/oauth2l/package.nix
index 612575d2b266..c6d7070486bd 100644
--- a/pkgs/by-name/oa/oauth2l/package.nix
+++ b/pkgs/by-name/oa/oauth2l/package.nix
@@ -23,7 +23,7 @@ buildGoModule rec {
   preCheck = "export HOME=$(mktemp -d)";
 
   # tests fail on linux for some reason
-  doCheck = stdenv.isDarwin;
+  doCheck = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Simple CLI for interacting with Google API authentication";
diff --git a/pkgs/by-name/oc/ocis-bin/package.nix b/pkgs/by-name/oc/ocis-bin/package.nix
index a0b8a62ed462..e853e40b35bc 100644
--- a/pkgs/by-name/oc/ocis-bin/package.nix
+++ b/pkgs/by-name/oc/ocis-bin/package.nix
@@ -18,9 +18,9 @@ let
     ."${stdenv.hostPlatform.system}" or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
 
   os =
-    if stdenv.isLinux then
+    if stdenv.hostPlatform.isLinux then
       "linux"
-    else if stdenv.isDarwin then
+    else if stdenv.hostPlatform.isDarwin then
       "darwin"
     else
       throw "Unsupported OS";
diff --git a/pkgs/by-name/oc/ocsinventory-agent/package.nix b/pkgs/by-name/oc/ocsinventory-agent/package.nix
index 7e5782cba0f1..d3f77414e049 100644
--- a/pkgs/by-name/oc/ocsinventory-agent/package.nix
+++ b/pkgs/by-name/oc/ocsinventory-agent/package.nix
@@ -32,7 +32,7 @@ perlPackages.buildPerlPackage rec {
     hash = "sha256-aFzBrUsVttUhpYGEYd/yYuXmE90PGCiBmBsVjtHcHLg=";
   };
 
-  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
   buildInputs = with perlPackages; [
     perl
@@ -48,9 +48,9 @@ perlPackages.buildPerlPackage rec {
     ProcDaemon
     ProcPIDFile
     XMLSimple
-  ] ++ lib.optionals stdenv.isLinux (with perlPackages; [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux (with perlPackages; [
     NetCUPS # cups-filters is broken on darwin
-  ]) ++ lib.optionals stdenv.isDarwin (with perlPackages; [
+  ]) ++ lib.optionals stdenv.hostPlatform.isDarwin (with perlPackages; [
     MacSysProfile
   ]);
 
@@ -62,14 +62,14 @@ perlPackages.buildPerlPackage rec {
       ipmitool # ipmitool
       nmap # nmap
       pciutils # lspci
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       dmidecode # dmidecode
       iproute2 # ip
       lvm2 # pvs
       usbutils # lsusb
       util-linux # last, lsblk, mount
     ];
-  in lib.optionalString stdenv.isDarwin ''
+  in lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/ocsinventory-agent
   '' + ''
     wrapProgram $out/bin/ocsinventory-agent --prefix PATH : ${lib.makeBinPath runtimeDependencies}
diff --git a/pkgs/by-name/od/odin/package.nix b/pkgs/by-name/od/odin/package.nix
index 305b9d329d02..4a14bfa443aa 100644
--- a/pkgs/by-name/od/odin/package.nix
+++ b/pkgs/by-name/od/odin/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   };
 
   postPatch =
-    lib.optionalString stdenv.isDarwin ''
+    lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace src/linker.cpp \
           --replace-fail '/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk' ${MacOSX-SDK}
     ''
@@ -46,7 +46,7 @@ stdenv.mkDerivation {
     which
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Security
   ];
diff --git a/pkgs/by-name/og/oguri/package.nix b/pkgs/by-name/og/oguri/package.nix
index 9156e6df39b0..b7cc17014ed3 100644
--- a/pkgs/by-name/og/oguri/package.nix
+++ b/pkgs/by-name/og/oguri/package.nix
@@ -37,6 +37,6 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ AndersonTorres ];
     inherit (wayland.meta) platforms;
-    broken = stdenv.isDarwin; # this should be enfoced by wayland platforms in the future
+    broken = stdenv.hostPlatform.isDarwin; # this should be enfoced by wayland platforms in the future
   };
 }
diff --git a/pkgs/by-name/ol/ollama/package.nix b/pkgs/by-name/ol/ollama/package.nix
index f16103382494..d286c1569916 100644
--- a/pkgs/by-name/ol/ollama/package.nix
+++ b/pkgs/by-name/ol/ollama/package.nix
@@ -62,8 +62,8 @@ let
   rocmRequested = shouldEnable "rocm" config.rocmSupport;
   cudaRequested = shouldEnable "cuda" config.cudaSupport;
 
-  enableRocm = rocmRequested && stdenv.isLinux;
-  enableCuda = cudaRequested && stdenv.isLinux;
+  enableRocm = rocmRequested && stdenv.hostPlatform.isLinux;
+  enableCuda = cudaRequested && stdenv.hostPlatform.isLinux;
 
   rocmLibs = [
     rocmPackages.clr
@@ -144,12 +144,12 @@ goBuild {
       makeWrapper
       autoAddDriverRunpath
     ]
-    ++ lib.optionals stdenv.isDarwin metalFrameworks;
+    ++ lib.optionals stdenv.hostPlatform.isDarwin metalFrameworks;
 
   buildInputs =
     lib.optionals enableRocm (rocmLibs ++ [ libdrm ])
     ++ lib.optionals enableCuda cudaLibs
-    ++ lib.optionals stdenv.isDarwin metalFrameworks;
+    ++ lib.optionals stdenv.hostPlatform.isDarwin metalFrameworks;
 
   patches = [
     # disable uses of `git` in the `go generate` script
@@ -209,7 +209,7 @@ goBuild {
           package = ollama;
         };
       }
-      // lib.optionalAttrs stdenv.isLinux {
+      // lib.optionalAttrs stdenv.hostPlatform.isLinux {
         inherit ollama-rocm ollama-cuda;
         service = nixosTests.ollama;
         service-cuda = nixosTests.ollama-cuda;
diff --git a/pkgs/by-name/on/onscripter-en/package.nix b/pkgs/by-name/on/onscripter-en/package.nix
index 74b440b42773..64c7cd931fa2 100644
--- a/pkgs/by-name/on/onscripter-en/package.nix
+++ b/pkgs/by-name/on/onscripter-en/package.nix
@@ -62,6 +62,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "onscripter-en";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/op/open-scq30/package.nix b/pkgs/by-name/op/open-scq30/package.nix
index 33d4e47c76fb..1028cfb68250 100644
--- a/pkgs/by-name/op/open-scq30/package.nix
+++ b/pkgs/by-name/op/open-scq30/package.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
     gtk4
     libadwaita
     pango
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.CoreBluetooth
     darwin.apple_sdk.frameworks.CoreGraphics
diff --git a/pkgs/by-name/op/openapi-python-client/package.nix b/pkgs/by-name/op/openapi-python-client/package.nix
index 550fca6c7abb..a4445a6a5670 100644
--- a/pkgs/by-name/op/openapi-python-client/package.nix
+++ b/pkgs/by-name/op/openapi-python-client/package.nix
@@ -27,7 +27,7 @@ python3Packages.buildPythonApplication rec {
     [
       installShellFiles
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.ps
     ];
 
diff --git a/pkgs/by-name/op/openctm/package.nix b/pkgs/by-name/op/openctm/package.nix
index 169e4469abcd..4d380543857f 100644
--- a/pkgs/by-name/op/openctm/package.nix
+++ b/pkgs/by-name/op/openctm/package.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
     "MAN1DIR=$(man)/share/man//man1"
   ];
 
-  makefile = if stdenv.isDarwin then "Makefile.macosx" else "Makefile.linux";
+  makefile = if stdenv.hostPlatform.isDarwin then "Makefile.macosx" else "Makefile.linux";
 
   preInstall = "mkdir -p $bin/bin $dev/include $out/lib $man/share/man/man1";
 
diff --git a/pkgs/by-name/op/openorienteering-mapper/package.nix b/pkgs/by-name/op/openorienteering-mapper/package.nix
index 037364ed6263..5d9fb8e256cd 100644
--- a/pkgs/by-name/op/openorienteering-mapper/package.nix
+++ b/pkgs/by-name/op/openorienteering-mapper/package.nix
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
     # See https://github.com/NixOS/nixpkgs/issues/85306
     (lib.cmakeBool "LICENSING_PROVIDER" false)
     (lib.cmakeBool "Mapper_MANUAL_QTHELP" false)
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # FindGDAL is broken and always finds /Library/Framework unless this is
     # specified
     (lib.cmakeFeature "GDAL_INCLUDE_DIR" "${gdal}/include")
diff --git a/pkgs/by-name/op/openpgl/package.nix b/pkgs/by-name/op/openpgl/package.nix
index 76e61b6658d6..db0ba62beb0f 100644
--- a/pkgs/by-name/op/openpgl/package.nix
+++ b/pkgs/by-name/op/openpgl/package.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DTBB_ROOT=${tbb.out}"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isAarch64 && !stdenv.isDarwin) "-flax-vector-conversions";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isAarch64 && !stdenv.hostPlatform.isDarwin) "-flax-vector-conversions";
 
   meta = {
     description = "Intel Open Path Guiding Library";
diff --git a/pkgs/by-name/op/openpgp-ca/package.nix b/pkgs/by-name/op/openpgp-ca/package.nix
index e97087ccf596..e2397c5413db 100644
--- a/pkgs/by-name/op/openpgp-ca/package.nix
+++ b/pkgs/by-name/op/openpgp-ca/package.nix
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
     sqlite
     pcsclite
     nettle
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ PCSC Security SystemConfiguration ]);
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ PCSC Security SystemConfiguration ]);
 
   # Most tests rely on gnupg being able to write to /run/user
   # gnupg refuses to respect the XDG_RUNTIME_DIR variable, so we skip the tests
diff --git a/pkgs/by-name/op/openpgp-card-tools/package.nix b/pkgs/by-name/op/openpgp-card-tools/package.nix
index 00a4be3e9ece..03d828204449 100644
--- a/pkgs/by-name/op/openpgp-card-tools/package.nix
+++ b/pkgs/by-name/op/openpgp-card-tools/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
 
-  buildInputs = [ pcsclite ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ pcsclite ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.PCSC
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/by-name/op/openscad-unstable/package.nix b/pkgs/by-name/op/openscad-unstable/package.nix
index eb1dd005af46..8a96876d65dd 100644
--- a/pkgs/by-name/op/openscad-unstable/package.nix
+++ b/pkgs/by-name/op/openscad-unstable/package.nix
@@ -92,7 +92,7 @@ clangStdenv.mkDerivation rec {
     qtbase
     qtmultimedia
   ]
-  ++ lib.optionals clangStdenv.isLinux [
+  ++ lib.optionals clangStdenv.hostPlatform.isLinux [
     xorg.libXdmcp
     libICE
     libSM
@@ -101,7 +101,7 @@ clangStdenv.mkDerivation rec {
     qtwayland
     libGLU
   ]
-  ++ lib.optional clangStdenv.isDarwin qtmacextras
+  ++ lib.optional clangStdenv.hostPlatform.isDarwin qtmacextras
   ;
   cmakeFlags = [
     "-DEXPERIMENTAL=ON" # enable experimental options
diff --git a/pkgs/by-name/op/opentelemetry-cpp/package.nix b/pkgs/by-name/op/opentelemetry-cpp/package.nix
index e8f799f765ee..47f4d7b73155 100644
--- a/pkgs/by-name/op/opentelemetry-cpp/package.nix
+++ b/pkgs/by-name/op/opentelemetry-cpp/package.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   patches = [
     ./0001-Disable-tests-requiring-network-access.patch
-  ] ++ lib.optional stdenv.isDarwin ./0002-Disable-segfaulting-test-on-Darwin.patch;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin ./0002-Disable-segfaulting-test-on-Darwin.patch;
 
   nativeBuildInputs = [ cmake ];
 
diff --git a/pkgs/by-name/op/openturns/package.nix b/pkgs/by-name/op/openturns/package.nix
index 58ca6a4139b5..5d62a61c2e95 100644
--- a/pkgs/by-name/op/openturns/package.nix
+++ b/pkgs/by-name/op/openturns/package.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation (finalAttrs: {
     python3Packages.psutil
     python3Packages.python
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Accelerate
   ];
 
diff --git a/pkgs/by-name/op/openvr/package.nix b/pkgs/by-name/op/openvr/package.nix
index 7d309065df9e..ed17bb7c8976 100644
--- a/pkgs/by-name/op/openvr/package.nix
+++ b/pkgs/by-name/op/openvr/package.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     jsoncpp
     libGL
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Foundation
   ];
@@ -60,7 +60,7 @@ stdenv.mkDerivation (finalAttrs: {
   passthru.updateScript = nix-update-script { };
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "API and runtime that allows access to VR hardware from multiple vendors without requiring that applications have specific knowledge of the hardware they are targeting";
     homepage = "https://github.com/ValveSoftware/openvr";
     license = lib.licenses.bsd3;
diff --git a/pkgs/by-name/op/ophcrack/package.nix b/pkgs/by-name/op/ophcrack/package.nix
index 13709ad9973a..1fbf6c180545 100644
--- a/pkgs/by-name/op/ophcrack/package.nix
+++ b/pkgs/by-name/op/ophcrack/package.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ] ++ lib.optional enableGui libsForQt5.wrapQtAppsHook;
   buildInputs =
     [ openssl ]
-    ++ (if enableGui then [ libsForQt5.qtcharts ] else [ expat ]) ++ lib.optional stdenv.isDarwin expat;
+    ++ (if enableGui then [ libsForQt5.qtcharts ] else [ expat ]) ++ lib.optional stdenv.hostPlatform.isDarwin expat;
 
   configureFlags =
     [ "--with-libssl" ]
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
         [ "--disable-gui" ]
     );
 
-  installPhase = lib.optional stdenv.isDarwin ''
+  installPhase = lib.optional stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/bin
     cp -R src/ophcrack $out/bin
   '';
diff --git a/pkgs/by-name/or/orbiton/package.nix b/pkgs/by-name/or/orbiton/package.nix
index f8fbc3484e12..6e9cee2539fe 100644
--- a/pkgs/by-name/or/orbiton/package.nix
+++ b/pkgs/by-name/or/orbiton/package.nix
@@ -15,7 +15,7 @@ buildGoModule rec {
 
   vendorHash = null;
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace "-Wl,--as-needed" ""
 
diff --git a/pkgs/by-name/or/ord/package.nix b/pkgs/by-name/or/ord/package.nix
index 2d13cc585aed..cc5257d6189b 100644
--- a/pkgs/by-name/or/ord/package.nix
+++ b/pkgs/by-name/or/ord/package.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/os/osqp-eigen/package.nix b/pkgs/by-name/os/osqp-eigen/package.nix
index 935bb0bfa659..016fbe8b0aca 100644
--- a/pkgs/by-name/os/osqp-eigen/package.nix
+++ b/pkgs/by-name/os/osqp-eigen/package.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   cmakeFlags = [
     (lib.cmakeBool "BUILD_TESTING" true)
-    (lib.cmakeBool "OSQPEIGEN_RUN_Valgrind_tests" stdenv.isLinux)
+    (lib.cmakeBool "OSQPEIGEN_RUN_Valgrind_tests" stdenv.hostPlatform.isLinux)
   ];
 
   nativeBuildInputs = [ cmake ];
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     osqp
   ];
   checkInputs = [ catch2 ];
-  nativeCheckInputs = lib.optional stdenv.isLinux valgrind;
+  nativeCheckInputs = lib.optional stdenv.hostPlatform.isLinux valgrind;
 
   doCheck = true;
 
diff --git a/pkgs/by-name/ow/owmods-cli/package.nix b/pkgs/by-name/ow/owmods-cli/package.nix
index 23db01329511..92809dab6243 100644
--- a/pkgs/by-name/ow/owmods-cli/package.nix
+++ b/pkgs/by-name/ow/owmods-cli/package.nix
@@ -35,9 +35,9 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     zstd
     libsoup_3
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/ow/owncloud-client/package.nix b/pkgs/by-name/ow/owncloud-client/package.nix
index 31f2b52b00bb..0de43753d13f 100644
--- a/pkgs/by-name/ow/owncloud-client/package.nix
+++ b/pkgs/by-name/ow/owncloud-client/package.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     qt6Packages.qtkeychain
     libre-graph-api-cpp-qt-client
     kdsingleapplication
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libinotify-kqueue sparkleshare
   ];
 
diff --git a/pkgs/by-name/pa/pablodraw/package.nix b/pkgs/by-name/pa/pablodraw/package.nix
index 793abf7f0158..012961c99b19 100644
--- a/pkgs/by-name/pa/pablodraw/package.nix
+++ b/pkgs/by-name/pa/pablodraw/package.nix
@@ -64,6 +64,6 @@ buildDotnetModule rec {
     mainProgram = "PabloDraw";
     maintainers = with maintainers; [ aleksana kip93 ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # Eto.Platform.Mac64 not found in nugetSource
+    broken = stdenv.hostPlatform.isDarwin; # Eto.Platform.Mac64 not found in nugetSource
   };
 }
diff --git a/pkgs/by-name/pa/paper-plane/package.nix b/pkgs/by-name/pa/paper-plane/package.nix
index d308a9325425..228c4aa638b0 100644
--- a/pkgs/by-name/pa/paper-plane/package.nix
+++ b/pkgs/by-name/pa/paper-plane/package.nix
@@ -101,7 +101,7 @@ stdenv.mkDerivation {
     gst_all_1.gst-libav
     gst_all_1.gst-plugins-base
     gst_all_1.gst-plugins-good
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/pa/paperlib/package.nix b/pkgs/by-name/pa/paperlib/package.nix
index c03f0434b3d8..d39e35be942b 100644
--- a/pkgs/by-name/pa/paperlib/package.nix
+++ b/pkgs/by-name/pa/paperlib/package.nix
@@ -39,7 +39,7 @@ let
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
   };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation {
     inherit
       pname
diff --git a/pkgs/by-name/pa/papers/package.nix b/pkgs/by-name/pa/papers/package.nix
index bfa2c5d6da2d..db943d8ea940 100644
--- a/pkgs/by-name/pa/papers/package.nix
+++ b/pkgs/by-name/pa/papers/package.nix
@@ -28,7 +28,7 @@
 , gi-docgen
 , libgxps
 , withLibsecret ? true
-, supportNautilus ? (!stdenv.isDarwin)
+, supportNautilus ? (!stdenv.hostPlatform.isDarwin)
 , libadwaita
 , exempi
 , cargo
@@ -95,7 +95,7 @@ stdenv.mkDerivation (finalAttrs: {
     libsecret
   ] ++ lib.optionals supportNautilus [
     nautilus
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
@@ -123,7 +123,7 @@ stdenv.mkDerivation (finalAttrs: {
       # https://gitlab.gnome.org/GNOME/Incubator/papers/-/issues/176
       --prefix PATH : "$out/bin"
     )
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath "$out/lib" "$out/bin/papers"
   '';
 
diff --git a/pkgs/by-name/pa/paru/package.nix b/pkgs/by-name/pa/paru/package.nix
index b8c457f8b58c..d961826d1247 100644
--- a/pkgs/by-name/pa/paru/package.nix
+++ b/pkgs/by-name/pa/paru/package.nix
@@ -54,7 +54,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   # https://aur.archlinux.org/packages/paru#comment-961914
-  buildFeatures = lib.optionals stdenv.isAarch64 [ "generate" ];
+  buildFeatures = lib.optionals stdenv.hostPlatform.isAarch64 [ "generate" ];
 
   postBuild = ''
     sh ./scripts/mkmo locale/
diff --git a/pkgs/by-name/pa/passes/package.nix b/pkgs/by-name/pa/passes/package.nix
index a20a1fe80b84..74d34f682b0d 100644
--- a/pkgs/by-name/pa/passes/package.nix
+++ b/pkgs/by-name/pa/passes/package.nix
@@ -63,6 +63,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # Crashes
+    broken = stdenv.hostPlatform.isDarwin; # Crashes
   };
 })
diff --git a/pkgs/by-name/pe/petsc/package.nix b/pkgs/by-name/pe/petsc/package.nix
index 2ea48a54a793..498a14c96dc3 100644
--- a/pkgs/by-name/pe/petsc/package.nix
+++ b/pkgs/by-name/pe/petsc/package.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     lapack
   ] ++ lib.optional hdf5-support hdf5 ++ lib.optional petsc-withp4est p4est ++ lib.optionals withParmetis [ metis parmetis ];
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace config/install.py \
       --replace /usr/bin/install_name_tool ${cctools}/bin/install_name_tool
   '';
diff --git a/pkgs/by-name/pg/pgagroal/package.nix b/pkgs/by-name/pg/pgagroal/package.nix
index 72eb5c153a48..2b89773af833 100644
--- a/pkgs/by-name/pg/pgagroal/package.nix
+++ b/pkgs/by-name/pg/pgagroal/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ cmake docutils ];
 
   buildInputs = [ cjson libev openssl ]
-    ++ lib.optionals stdenv.isLinux [ systemd ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ systemd ];
 
   meta = with lib; {
     description = "High-performance connection pool for PostgreSQL";
diff --git a/pkgs/by-name/pg/pgcopydb/package.nix b/pkgs/by-name/pg/pgcopydb/package.nix
index 0df2ab9c04f7..1fda00a750e9 100644
--- a/pkgs/by-name/pg/pgcopydb/package.nix
+++ b/pkgs/by-name/pg/pgcopydb/package.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
     readline
     sqlite
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     pam
   ];
 
diff --git a/pkgs/by-name/ph/photoqt/package.nix b/pkgs/by-name/ph/photoqt/package.nix
index ff80e9bc1542..6e66d6885efc 100644
--- a/pkgs/by-name/ph/photoqt/package.nix
+++ b/pkgs/by-name/ph/photoqt/package.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
       qt6Packages.poppler
       zxing-cpp
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       mpv
       qt6.qtwayland
     ];
@@ -59,12 +59,12 @@ stdenv.mkDerivation rec {
     (lib.cmakeBool "CHROMECAST" false)
     (lib.cmakeBool "FREEIMAGE" false)
     (lib.cmakeBool "IMAGEMAGICK" false)
-    (lib.cmakeBool "VIDEO_MPV" (!stdenv.isDarwin))
+    (lib.cmakeBool "VIDEO_MPV" (!stdenv.hostPlatform.isDarwin))
   ];
 
   env.MAGICK_LOCATION = "${graphicsmagick}/include/GraphicsMagick";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/photoqt.app $out/Applications
     makeWrapper $out/{Applications/photoqt.app/Contents/MacOS,bin}/photoqt
diff --git a/pkgs/by-name/pi/picocom/package.nix b/pkgs/by-name/pi/picocom/package.nix
index 9e9d1380558a..4a549e27921c 100644
--- a/pkgs/by-name/pi/picocom/package.nix
+++ b/pkgs/by-name/pi/picocom/package.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [
     linenoise
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
 
   makeFlags = [
     "HISTFILE=.cache/picocom_history"
diff --git a/pkgs/by-name/pi/picocrypt/package.nix b/pkgs/by-name/pi/picocrypt/package.nix
index 92ddceef7372..d77509135d0e 100644
--- a/pkgs/by-name/pi/picocrypt/package.nix
+++ b/pkgs/by-name/pi/picocrypt/package.nix
@@ -37,7 +37,7 @@ buildGoModule rec {
     # Depends on a vendored, patched GLFW.
     glfw.buildInputs or [ ]
     ++ glfw.propagatedBuildInputs or [ ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       gtk3
       xorg.libXxf86vm
     ];
diff --git a/pkgs/by-name/pi/pietrasanta-traceroute/package.nix b/pkgs/by-name/pi/pietrasanta-traceroute/package.nix
index 195ea1ad97b0..2c2b824f8616 100644
--- a/pkgs/by-name/pi/pietrasanta-traceroute/package.nix
+++ b/pkgs/by-name/pi/pietrasanta-traceroute/package.nix
@@ -36,6 +36,6 @@ stdenv.mkDerivation rec {
     mainProgram = "traceroute";
     maintainers = with maintainers; [ nicoo ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/pi/pinocchio/package.nix b/pkgs/by-name/pi/pinocchio/package.nix
index e754078a3805..7284be49df7c 100644
--- a/pkgs/by-name/pi/pinocchio/package.nix
+++ b/pkgs/by-name/pi/pinocchio/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # test failure, ref https://github.com/stack-of-tasks/pinocchio/issues/2277
-  prePatch = lib.optionalString (stdenv.isLinux && stdenv.isAarch64) ''
+  prePatch = lib.optionalString (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) ''
     substituteInPlace unittest/algorithm/utils/CMakeLists.txt \
       --replace-fail "add_pinocchio_unit_test(force)" ""
   '';
diff --git a/pkgs/by-name/pi/pinokio/package.nix b/pkgs/by-name/pi/pinokio/package.nix
index 97b9ad7514e7..f71f7800c462 100644
--- a/pkgs/by-name/pi/pinokio/package.nix
+++ b/pkgs/by-name/pi/pinokio/package.nix
@@ -31,7 +31,7 @@ let
   };
 in
 
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation
   {
     inherit pname version src meta;
diff --git a/pkgs/by-name/pi/pio/package.nix b/pkgs/by-name/pi/pio/package.nix
index 01aa886c3002..f79c12256e23 100644
--- a/pkgs/by-name/pi/pio/package.nix
+++ b/pkgs/by-name/pi/pio/package.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-jVOpk+Z3yEEoDexvxT9I0aVHJKVq47y8km/9ltoqrDA=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Accelerate
   ];
 
diff --git a/pkgs/by-name/pi/piv-agent/package.nix b/pkgs/by-name/pi/piv-agent/package.nix
index d1c35d815341..5a8f25000efc 100644
--- a/pkgs/by-name/pi/piv-agent/package.nix
+++ b/pkgs/by-name/pi/piv-agent/package.nix
@@ -24,10 +24,10 @@ buildGoModule rec {
 
   ldflags = [ "-s" "-w" "-X main.version=${version}" "-X main.shortCommit=${src.rev}" ];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
   buildInputs =
-    if stdenv.isDarwin
+    if stdenv.hostPlatform.isDarwin
     then [ darwin.apple_sdk.frameworks.PCSC ]
     else [ pcsclite ];
 
diff --git a/pkgs/by-name/pi/pixi/package.nix b/pkgs/by-name/pi/pixi/package.nix
index 6c0ed9ebc0e2..85413acc64ed 100644
--- a/pkgs/by-name/pi/pixi/package.nix
+++ b/pkgs/by-name/pi/pixi/package.nix
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libgit2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin (
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk_11_0.frameworks; [ CoreFoundation IOKit SystemConfiguration Security ]
   );
 
@@ -50,7 +50,7 @@ rustPlatform.buildRustPackage rec {
 
   # There are some CI failures with Rattler. Tests on Aarch64 has been skipped.
   # See https://github.com/prefix-dev/pixi/pull/241.
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   preCheck = ''
     export HOME="$(mktemp -d)"
@@ -81,7 +81,7 @@ rustPlatform.buildRustPackage rec {
     "--skip=test_task_with_env"
     "--skip=test_pixi_only_env_activation"
     "--skip=cli::shell_hook::tests::test_environment_json"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--skip=task::task_environment::tests::test_find_ambiguous_task"
     "--skip=task::task_environment::tests::test_find_task_dual_defined"
     "--skip=task::task_environment::tests::test_find_task_explicit_defined"
diff --git a/pkgs/by-name/pi/pizauth/package.nix b/pkgs/by-name/pi/pizauth/package.nix
index 811b74b9724f..31435c52f017 100644
--- a/pkgs/by-name/pi/pizauth/package.nix
+++ b/pkgs/by-name/pi/pizauth/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   postInstall = ''
     installShellCompletion --cmd pizauth \
diff --git a/pkgs/by-name/pl/platformsh/package.nix b/pkgs/by-name/pl/platformsh/package.nix
index 683e34a87a0b..730990f103ff 100644
--- a/pkgs/by-name/pl/platformsh/package.nix
+++ b/pkgs/by-name/pl/platformsh/package.nix
@@ -8,11 +8,11 @@
 }:
 
 let versions = lib.importJSON ./versions.json;
-    arch = if stdenvNoCC.isx86_64 then "amd64"
-           else if stdenvNoCC.isAarch64 then "arm64"
+    arch = if stdenvNoCC.hostPlatform.isx86_64 then "amd64"
+           else if stdenvNoCC.hostPlatform.isAarch64 then "arm64"
            else throw "Unsupported architecture";
-    os = if stdenvNoCC.isLinux then "linux"
-         else if stdenvNoCC.isDarwin then "darwin"
+    os = if stdenvNoCC.hostPlatform.isLinux then "linux"
+         else if stdenvNoCC.hostPlatform.isDarwin then "darwin"
          else throw "Unsupported os";
     versionInfo = versions."${os}-${arch}";
     inherit (versionInfo) hash url;
diff --git a/pkgs/by-name/pl/pls/package.nix b/pkgs/by-name/pl/pls/package.nix
index 1db958dcf6be..10463b6c968f 100644
--- a/pkgs/by-name/pl/pls/package.nix
+++ b/pkgs/by-name/pl/pls/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-d6HfIEROudINn2Jbnc3EEDZCD833FFFeUk6mvlu0ErA=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/pm/pmbootstrap/package.nix b/pkgs/by-name/pm/pmbootstrap/package.nix
index a1c3717c2188..cee9a0b13b7e 100644
--- a/pkgs/by-name/pm/pmbootstrap/package.nix
+++ b/pkgs/by-name/pm/pmbootstrap/package.nix
@@ -24,7 +24,7 @@ python3Packages.buildPythonApplication rec {
   pmb_test = "${src}/test";
 
   # Tests depend on sudo
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   build-system = [
     python3Packages.setuptools
diff --git a/pkgs/by-name/po/podman-tui/package.nix b/pkgs/by-name/po/podman-tui/package.nix
index 8841cc3c1320..7f4f84948f3a 100644
--- a/pkgs/by-name/po/podman-tui/package.nix
+++ b/pkgs/by-name/po/podman-tui/package.nix
@@ -16,7 +16,7 @@ buildGoModule rec {
   CGO_ENABLED = 0;
 
   tags = [ "containers_image_openpgp" "remote" ]
-    ++ lib.optional stdenv.isDarwin "darwin";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "darwin";
 
   ldflags = [ "-s" "-w" ];
 
diff --git a/pkgs/by-name/po/poke/package.nix b/pkgs/by-name/po/poke/package.nix
index 6bd5786089ab..0f392f3cbe8d 100644
--- a/pkgs/by-name/po/poke/package.nix
+++ b/pkgs/by-name/po/poke/package.nix
@@ -6,7 +6,7 @@
 , texinfo
 , boehmgc
 , readline
-, nbdSupport ? !stdenv.isDarwin, libnbd
+, nbdSupport ? !stdenv.hostPlatform.isDarwin, libnbd
 , textStylingSupport ? true, gettext
 , dejagnu
 
@@ -86,6 +86,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.gpl3Plus;
     maintainers = with lib.maintainers; [ AndersonTorres kira-bruneau ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/by-name/po/portablemc/package.nix b/pkgs/by-name/po/portablemc/package.nix
index c8faf2b492a6..12872711f56a 100644
--- a/pkgs/by-name/po/portablemc/package.nix
+++ b/pkgs/by-name/po/portablemc/package.nix
@@ -17,7 +17,7 @@
   openal,
   udev,
 
-  textToSpeechSupport ? stdenv.isLinux,
+  textToSpeechSupport ? stdenv.hostPlatform.isLinux,
   flite,
 }:
 
diff --git a/pkgs/by-name/pr/presenterm/package.nix b/pkgs/by-name/pr/presenterm/package.nix
index d2915f4f8a13..1ee721828e19 100644
--- a/pkgs/by-name/pr/presenterm/package.nix
+++ b/pkgs/by-name/pr/presenterm/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   # Crashes at runtime on darwin with:
   # Library not loaded: .../out/lib/libsixel.1.dylib
-  buildFeatures = lib.optionals (!stdenv.isDarwin) [ "sixel" ];
+  buildFeatures = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "sixel" ];
 
   passthru = {
     updateScript = nix-update-script { };
diff --git a/pkgs/by-name/pr/prismlauncher-unwrapped/package.nix b/pkgs/by-name/pr/prismlauncher-unwrapped/package.nix
index 2a0850069317..e5fb12a80c14 100644
--- a/pkgs/by-name/pr/prismlauncher-unwrapped/package.nix
+++ b/pkgs/by-name/pr/prismlauncher-unwrapped/package.nix
@@ -17,7 +17,7 @@
   zlib,
 
   msaClientID ? null,
-  gamemodeSupport ? stdenv.isLinux,
+  gamemodeSupport ? stdenv.hostPlatform.isLinux,
 }:
 
 let
@@ -30,7 +30,7 @@ let
 in
 
 assert lib.assertMsg (
-  gamemodeSupport -> stdenv.isLinux
+  gamemodeSupport -> stdenv.hostPlatform.isLinux
 ) "gamemodeSupport is only available on Linux.";
 
 stdenv.mkDerivation (finalAttrs: {
@@ -66,10 +66,10 @@ stdenv.mkDerivation (finalAttrs: {
       tomlplusplus
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ]
     ++ lib.optional gamemodeSupport gamemode;
 
-  hardeningEnable = lib.optionals stdenv.isLinux [ "pie" ];
+  hardeningEnable = lib.optionals stdenv.hostPlatform.isLinux [ "pie" ];
 
   cmakeFlags =
     [
@@ -82,7 +82,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optionals (lib.versionOlder kdePackages.qtbase.version "6") [
       (lib.cmakeFeature "Launcher_QT_VERSION_MAJOR" "5")
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # we wrap our binary manually
       (lib.cmakeFeature "INSTALL_BUNDLE" "nodeps")
       # disable built-in updater
diff --git a/pkgs/by-name/pr/prismlauncher/package.nix b/pkgs/by-name/pr/prismlauncher/package.nix
index b58622271b6e..ab9b7144b922 100644
--- a/pkgs/by-name/pr/prismlauncher/package.nix
+++ b/pkgs/by-name/pr/prismlauncher/package.nix
@@ -31,23 +31,23 @@
 
   additionalLibs ? [ ],
   additionalPrograms ? [ ],
-  controllerSupport ? stdenv.isLinux,
-  gamemodeSupport ? stdenv.isLinux,
+  controllerSupport ? stdenv.hostPlatform.isLinux,
+  gamemodeSupport ? stdenv.hostPlatform.isLinux,
   jdks ? [
     jdk21
     jdk17
     jdk8
   ],
   msaClientID ? null,
-  textToSpeechSupport ? stdenv.isLinux,
+  textToSpeechSupport ? stdenv.hostPlatform.isLinux,
 }:
 
 assert lib.assertMsg (
-  controllerSupport -> stdenv.isLinux
+  controllerSupport -> stdenv.hostPlatform.isLinux
 ) "controllerSupport only has an effect on Linux.";
 
 assert lib.assertMsg (
-  textToSpeechSupport -> stdenv.isLinux
+  textToSpeechSupport -> stdenv.hostPlatform.isLinux
 ) "textToSpeechSupport only has an effect on Linux.";
 
 let
@@ -67,7 +67,7 @@ symlinkJoin {
       kdePackages.qtsvg
     ]
     ++ lib.optional (
-      lib.versionAtLeast kdePackages.qtbase.version "6" && stdenv.isLinux
+      lib.versionAtLeast kdePackages.qtbase.version "6" && stdenv.hostPlatform.isLinux
     ) kdePackages.qtwayland;
 
   postBuild = ''
@@ -114,7 +114,7 @@ symlinkJoin {
 
     in
     [ "--prefix PRISMLAUNCHER_JAVA_PATHS : ${lib.makeSearchPath "bin/java" jdks}" ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       "--set LD_LIBRARY_PATH ${addDriverRunpath.driverLink}/lib:${lib.makeLibraryPath runtimeLibs}"
       "--prefix PATH : ${lib.makeBinPath runtimePrograms}"
     ];
diff --git a/pkgs/by-name/pr/probe-rs-tools/package.nix b/pkgs/by-name/pr/probe-rs-tools/package.nix
index 64b014517c63..b072922e732f 100644
--- a/pkgs/by-name/pr/probe-rs-tools/package.nix
+++ b/pkgs/by-name/pr/probe-rs-tools/package.nix
@@ -34,9 +34,9 @@ rustPlatform.buildRustPackage rec {
     # https://github.com/probe-rs/probe-rs/pull/2492
     gitMinimal
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
 
-  buildInputs = [ libusb1 openssl ] ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = [ libusb1 openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   checkFlags = [
     # require a physical probe
diff --git a/pkgs/by-name/pr/prometheus-node-exporter/package.nix b/pkgs/by-name/pr/prometheus-node-exporter/package.nix
index 7ddf75a893aa..5f1e9c50cc6b 100644
--- a/pkgs/by-name/pr/prometheus-node-exporter/package.nix
+++ b/pkgs/by-name/pr/prometheus-node-exporter/package.nix
@@ -17,7 +17,7 @@ buildGoModule rec {
   # FIXME: tests fail due to read-only nix store
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation IOKit ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation IOKit ]);
 
   excludedPackages = [ "docs/node-mixin" ];
 
diff --git a/pkgs/by-name/pr/proto/package.nix b/pkgs/by-name/pr/proto/package.nix
index 733567311649..dcd22825f736 100644
--- a/pkgs/by-name/pr/proto/package.nix
+++ b/pkgs/by-name/pr/proto/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-yPXf6f4dwCaT0nKDWiZ+FIvOyWB/WqiwKi1b/rBtNIQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
     libiconv
   ];
diff --git a/pkgs/by-name/pr/protoc-gen-js/package.nix b/pkgs/by-name/pr/protoc-gen-js/package.nix
index 5f3a592e0faa..debf368cdf19 100644
--- a/pkgs/by-name/pr/protoc-gen-js/package.nix
+++ b/pkgs/by-name/pr/protoc-gen-js/package.nix
@@ -17,7 +17,7 @@ buildBazelPackage rec {
   removeRulesCC = false;
   removeLocalConfigCC = false;
 
-  LIBTOOL = lib.optionalString stdenv.isDarwin "${cctools}/bin/libtool";
+  LIBTOOL = lib.optionalString stdenv.hostPlatform.isDarwin "${cctools}/bin/libtool";
 
   fetchAttrs.hash = "sha256-WOBlZ0XNrl5UxIaSDxZeOfzS2a8ZkrKdTLKHBDC9UNQ=";
 
diff --git a/pkgs/by-name/pr/protonmail-desktop/package.nix b/pkgs/by-name/pr/protonmail-desktop/package.nix
index 2d937677045d..a5dd3ce319f8 100644
--- a/pkgs/by-name/pr/protonmail-desktop/package.nix
+++ b/pkgs/by-name/pr/protonmail-desktop/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url =
-      if stdenv.isDarwin then
+      if stdenv.hostPlatform.isDarwin then
         "https://github.com/ProtonMail/inbox-desktop/releases/download/${version}/Proton.Mail-darwin-universal-${version}.zip"
       else
         "https://github.com/ProtonMail/inbox-desktop/releases/download/${version}/proton-mail_${version}_amd64.deb";
@@ -38,14 +38,14 @@ stdenv.mkDerivation rec {
       .${stdenv.hostPlatform.system} or (throw "unsupported system ${stdenv.hostPlatform.system}");
   };
 
-  sourceRoot = lib.optionalString stdenv.isDarwin ".";
+  sourceRoot = lib.optionalString stdenv.hostPlatform.isDarwin ".";
 
   dontConfigure = true;
   dontBuild = true;
 
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optional stdenv.isLinux dpkg ++ lib.optional stdenv.isDarwin unzip;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux dpkg ++ lib.optional stdenv.hostPlatform.isDarwin unzip;
 
   installPhase =
     let
@@ -65,12 +65,12 @@ stdenv.mkDerivation rec {
     ''
       runHook preInstall
 
-      ${if stdenv.isDarwin then darwin else linux}
+      ${if stdenv.hostPlatform.isDarwin then darwin else linux}
 
       runHook postInstall
     '';
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     makeWrapper ${lib.getExe electron} $out/bin/${mainProgram} \
       --add-flags $out/share/app.asar \
       --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}" \
diff --git a/pkgs/by-name/pr/prr/package.nix b/pkgs/by-name/pr/prr/package.nix
index 46576e1a1822..ba07cd6fe0c9 100644
--- a/pkgs/by-name/pr/prr/package.nix
+++ b/pkgs/by-name/pr/prr/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-vCZjgmBYO+I6MZLCOMp50bWEeHwLbZsxSz5gRmBykvI=";
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/pt/pterm/package.nix b/pkgs/by-name/pt/pterm/package.nix
index c0d96e44f124..463a05ac0697 100644
--- a/pkgs/by-name/pt/pterm/package.nix
+++ b/pkgs/by-name/pt/pterm/package.nix
@@ -43,6 +43,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ sarcasticadmin ];
     mainProgram = "pterm";
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/pw/pwndbg/package.nix b/pkgs/by-name/pw/pwndbg/package.nix
index bad009b07ab2..5c612e7bfaa9 100644
--- a/pkgs/by-name/pw/pwndbg/package.nix
+++ b/pkgs/by-name/pw/pwndbg/package.nix
@@ -12,7 +12,7 @@ let
 
   binPath = lib.makeBinPath ([
     python3.pkgs.pwntools # ref: https://github.com/pwndbg/pwndbg/blob/2022.12.19/pwndbg/wrappers/checksec.py#L8
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     python3.pkgs.ropper # ref: https://github.com/pwndbg/pwndbg/blob/2022.12.19/pwndbg/commands/ropper.py#L30
     python3.pkgs.ropgadget # ref: https://github.com/pwndbg/pwndbg/blob/2022.12.19/pwndbg/commands/rop.py#L32
   ]);
@@ -64,6 +64,6 @@ stdenv.mkDerivation {
     platforms = platforms.all;
     maintainers = with maintainers; [ mic92 patryk4815 msanft ];
     # not supported on aarch64-darwin see: https://inbox.sourceware.org/gdb/3185c3b8-8a91-4beb-a5d5-9db6afb93713@Spark/
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/py/pylyzer/package.nix b/pkgs/by-name/py/pylyzer/package.nix
index 6646a3b6d0b7..14b6608113d3 100644
--- a/pkgs/by-name/py/pylyzer/package.nix
+++ b/pkgs/by-name/py/pylyzer/package.nix
@@ -36,9 +36,9 @@ rustPlatform.buildRustPackage rec {
     git
     python3
     makeWrapper
-  ] ++ lib.optionals stdenv.isDarwin [ (writeScriptBin "diskutil" "") ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ (writeScriptBin "diskutil" "") ];
 
-  buildInputs = [ python3 ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = [ python3 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   preBuild = ''
     export HOME=$TMPDIR
diff --git a/pkgs/by-name/py/pyxel/package.nix b/pkgs/by-name/py/pyxel/package.nix
index 23a7836164e4..1103dbba4619 100644
--- a/pkgs/by-name/py/pyxel/package.nix
+++ b/pkgs/by-name/py/pyxel/package.nix
@@ -46,7 +46,7 @@ python3.pkgs.buildPythonApplication rec {
 
   buildInputs =
     [ SDL2 ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.IOKit
     ];
diff --git a/pkgs/by-name/qg/qgrep/package.nix b/pkgs/by-name/qg/qgrep/package.nix
index 57c3d20db283..f485aa0d9147 100644
--- a/pkgs/by-name/qg/qgrep/package.nix
+++ b/pkgs/by-name/qg/qgrep/package.nix
@@ -25,12 +25,12 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=unused-command-line-argument"
     "-Wno-error=unqualified-std-cast-call"
   ]);
diff --git a/pkgs/by-name/qs/qsv/package.nix b/pkgs/by-name/qs/qsv/package.nix
index ba0280c19bd8..c59ad323f86b 100644
--- a/pkgs/by-name/qs/qsv/package.nix
+++ b/pkgs/by-name/qs/qsv/package.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage {
       sqlite
       zstd
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AppKit
diff --git a/pkgs/by-name/qt/qtalarm/package.nix b/pkgs/by-name/qt/qtalarm/package.nix
index f66c1040e5a2..457e6d1659c0 100644
--- a/pkgs/by-name/qt/qtalarm/package.nix
+++ b/pkgs/by-name/qt/qtalarm/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
       runHook preInstall
     ''
     + (
-      if stdenv.isDarwin then
+      if stdenv.hostPlatform.isDarwin then
         ''
           mkdir -p $out/Applications
           mv qtalarm.app $out/Applications
diff --git a/pkgs/by-name/qu/quickemu/package.nix b/pkgs/by-name/qu/quickemu/package.nix
index 35ffc1694fef..cfd3838c9c51 100644
--- a/pkgs/by-name/qu/quickemu/package.nix
+++ b/pkgs/by-name/qu/quickemu/package.nix
@@ -48,7 +48,7 @@ let
       xrandr
       zsync
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       mesa-demos
       usbutils
       xdg-user-dirs
diff --git a/pkgs/by-name/qu/quickjs-ng/package.nix b/pkgs/by-name/qu/quickjs-ng/package.nix
index 35a71244cab6..6e434e9d9a99 100644
--- a/pkgs/by-name/qu/quickjs-ng/package.nix
+++ b/pkgs/by-name/qu/quickjs-ng/package.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "BUILD_STATIC_QJS_EXE" stdenv.hostPlatform.isStatic)
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
     "-Wno-error=stringop-overflow"
   ]);
 
diff --git a/pkgs/by-name/qu/quickjs/package.nix b/pkgs/by-name/qu/quickjs/package.nix
index 447f486a0914..1366fd03cd55 100644
--- a/pkgs/by-name/qu/quickjs/package.nix
+++ b/pkgs/by-name/qu/quickjs/package.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-PEv4+JW/pUvrSGyNEhgRJ3Hs/FrDvhA2hR70FWghLgM=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace "CONFIG_LTO=y" ""
   '';
 
diff --git a/pkgs/by-name/r0/r0vm/package.nix b/pkgs/by-name/r0/r0vm/package.nix
index 36789e41921b..e47a41260b60 100644
--- a/pkgs/by-name/r0/r0vm/package.nix
+++ b/pkgs/by-name/r0/r0vm/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl.dev
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/ra/rage/package.nix b/pkgs/by-name/ra/rage/package.nix
index a6024ace3176..0c41c5a55368 100644
--- a/pkgs/by-name/ra/rage/package.nix
+++ b/pkgs/by-name/ra/rage/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/ra/railway/package.nix b/pkgs/by-name/ra/railway/package.nix
index 2e7cf3d90e05..ce17913cd06b 100644
--- a/pkgs/by-name/ra/railway/package.nix
+++ b/pkgs/by-name/ra/railway/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreServices
       Security
       SystemConfiguration
diff --git a/pkgs/by-name/ra/raspberrypi-eeprom/package.nix b/pkgs/by-name/ra/raspberrypi-eeprom/package.nix
index 8f46010cce05..5d4580e46f25 100644
--- a/pkgs/by-name/ra/raspberrypi-eeprom/package.nix
+++ b/pkgs/by-name/ra/raspberrypi-eeprom/package.nix
@@ -48,7 +48,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     for i in rpi-eeprom-update rpi-eeprom-config; do
       wrapProgram $out/bin/$i \
         --set FIRMWARE_ROOT "$out/lib/firmware/raspberrypi/bootloader" \
-        ${lib.optionalString stdenvNoCC.isAarch64 "--set VCMAILBOX ${libraspberrypi}/bin/vcmailbox"} \
+        ${lib.optionalString stdenvNoCC.hostPlatform.isAarch64 "--set VCMAILBOX ${libraspberrypi}/bin/vcmailbox"} \
         --prefix PATH : "${lib.makeBinPath ([
           binutils-unwrapped
           findutils
@@ -56,7 +56,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
           kmod
           pciutils
           (placeholder "out")
-        ] ++ lib.optionals stdenvNoCC.isAarch64 [
+        ] ++ lib.optionals stdenvNoCC.hostPlatform.isAarch64 [
           libraspberrypi
         ])}"
     done
diff --git a/pkgs/by-name/ra/rathole/package.nix b/pkgs/by-name/ra/rathole/package.nix
index 38d163daf8d8..51bc1cfedd55 100644
--- a/pkgs/by-name/ra/rathole/package.nix
+++ b/pkgs/by-name/ra/rathole/package.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreServices ]);
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ CoreServices ]);
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/by-name/ra/rav1e/package.nix b/pkgs/by-name/ra/rav1e/package.nix
index 50cf9bef9e1e..e8834ac131e4 100644
--- a/pkgs/by-name/ra/rav1e/package.nix
+++ b/pkgs/by-name/ra/rav1e/package.nix
@@ -37,14 +37,14 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ zlib ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.Security
     ];
 
   # Darwin uses `llvm-strip`, which results in link errors when using `-x` to strip the asm library
   # and linking it with cctools ld64.
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     substituteInPlace build.rs --replace-fail '.arg("-x")' '.arg("-S")'
     # Thin LTO doesn’t appear to work with Rust 1.79. rav1e fail to build when building fern.
     substituteInPlace Cargo.toml --replace-fail 'lto = "thin"' 'lto = "fat"'
diff --git a/pkgs/by-name/rc/rcp/package.nix b/pkgs/by-name/rc/rcp/package.nix
index bafdf95b073f..bc4be1730178 100644
--- a/pkgs/by-name/rc/rcp/package.nix
+++ b/pkgs/by-name/rc/rcp/package.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-INLXVruiaK5yv5old0NOWFcg9y13M6Dm7bBMmcPFY1I=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     IOKit
   ]);
 
@@ -37,6 +37,6 @@ rustPlatform.buildRustPackage rec {
     mainProgram = "rcp";
     maintainers = with maintainers; [ wykurz ];
     # = note: Undefined symbols for architecture x86_64: "_utimensat"
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/by-name/re/realm/package.nix b/pkgs/by-name/re/realm/package.nix
index e76189e1ac8d..34914df2987e 100644
--- a/pkgs/by-name/re/realm/package.nix
+++ b/pkgs/by-name/re/realm/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-EvXafTujqTdQwfK4NXgT7lGKGnrpyP9ouplD6DmJUKU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/re/realvnc-vnc-viewer/package.nix b/pkgs/by-name/re/realvnc-vnc-viewer/package.nix
index 6e1dc6762b14..d6a916df0ae0 100644
--- a/pkgs/by-name/re/realvnc-vnc-viewer/package.nix
+++ b/pkgs/by-name/re/realvnc-vnc-viewer/package.nix
@@ -20,5 +20,5 @@ let
     mainProgram = "vncviewer";
   };
 in
-if stdenv.isDarwin then callPackage ./darwin.nix { inherit pname version meta; }
+if stdenv.hostPlatform.isDarwin then callPackage ./darwin.nix { inherit pname version meta; }
 else callPackage ./linux.nix { inherit pname version meta; }
diff --git a/pkgs/by-name/re/redict/package.nix b/pkgs/by-name/re/redict/package.nix
index 54820d6eb096..a916cfcd3ba7 100644
--- a/pkgs/by-name/re/redict/package.nix
+++ b/pkgs/by-name/re/redict/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional withSystemd systemd
     ++ lib.optionals tlsSupport [ openssl ];
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/Makefile --replace "-flto" ""
   '';
 
@@ -49,12 +49,12 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
+  hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
 
   env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.cc.isClang [ "-std=c11" ]);
 
   # darwin currently lacks a pure `pgrep` which is extensively used here
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [ which tcl ps ] ++ lib.optionals stdenv.hostPlatform.isStatic [ getconf ];
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/by-name/re/redlib/package.nix b/pkgs/by-name/re/redlib/package.nix
index c1c661a9a330..51c80078e372 100644
--- a/pkgs/by-name/re/redlib/package.nix
+++ b/pkgs/by-name/re/redlib/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-XSmeJAK18J9WxrG5orFbAB9hWVLQQ50oB223oHT3OOk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/re/refind/package.nix b/pkgs/by-name/re/refind/package.nix
index 9c4cda573e58..2958d3be85fd 100644
--- a/pkgs/by-name/re/refind/package.nix
+++ b/pkgs/by-name/re/refind/package.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
       "EFICRT0=${gnu-efi}/lib"
       "HOSTARCH=${hostarch}"
       "ARCH=${hostarch}"
-    ] ++ lib.optional stdenv.isAarch64 [
+    ] ++ lib.optional stdenv.hostPlatform.isAarch64 [
       # aarch64 is special for GNU-EFI, see BUILDING.txt
       "GNUEFI_ARM64_TARGET_SUPPORT=y"
     ];
diff --git a/pkgs/by-name/re/refinery-cli/package.nix b/pkgs/by-name/re/refinery-cli/package.nix
index c70e69bee988..59a5dd255ba6 100644
--- a/pkgs/by-name/re/refinery-cli/package.nix
+++ b/pkgs/by-name/re/refinery-cli/package.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   meta = with lib; {
     description = "Run migrations for the Refinery ORM for Rust via the CLI";
diff --git a/pkgs/by-name/re/release-plz/package.nix b/pkgs/by-name/re/release-plz/package.nix
index da5b97c8ef47..d176accf9d56 100644
--- a/pkgs/by-name/re/release-plz/package.nix
+++ b/pkgs/by-name/re/release-plz/package.nix
@@ -41,6 +41,6 @@ rustPlatform.buildRustPackage rec {
     license = with lib.licenses; [ asl20 mit ];
     maintainers = with lib.maintainers; [ dannixon ];
     mainProgram = "release-plz";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/re/remind/package.nix b/pkgs/by-name/re/remind/package.nix
index 78ae694b1659..2f630416995b 100644
--- a/pkgs/by-name/re/remind/package.nix
+++ b/pkgs/by-name/re/remind/package.nix
@@ -38,7 +38,7 @@ tcl.mkTclDerivation rec {
       --replace-fail 'set Rem2PDF "rem2pdf"' "set Rem2PDF \"$out/bin/rem2pdf\""
   '';
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     # On Darwin setenv and unsetenv are defined in stdlib.h from libSystem
     "-DHAVE_SETENV"
     "-DHAVE_UNSETENV"
diff --git a/pkgs/by-name/re/rerun/package.nix b/pkgs/by-name/re/rerun/package.nix
index 84324b4bb084..41d4f7828884 100644
--- a/pkgs/by-name/re/rerun/package.nix
+++ b/pkgs/by-name/re/rerun/package.nix
@@ -61,7 +61,7 @@ rustPlatform.buildRustPackage rec {
       libxkbcommon
       vulkan-loader
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.CoreGraphics
@@ -72,7 +72,7 @@ rustPlatform.buildRustPackage rec {
       darwin.apple_sdk.frameworks.QuartzCore
       darwin.apple_sdk.frameworks.Security
     ]
-    ++ lib.optionals stdenv.isLinux [ (lib.getLib wayland) ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ (lib.getLib wayland) ];
 
   addDlopenRunpaths = map (p: "${lib.getLib p}/lib") (
     lib.optionals stdenv.hostPlatform.isLinux [
diff --git a/pkgs/by-name/re/retool/package.nix b/pkgs/by-name/re/retool/package.nix
index a22ce582b9eb..15e2c15a5e85 100644
--- a/pkgs/by-name/re/retool/package.nix
+++ b/pkgs/by-name/re/retool/package.nix
@@ -29,7 +29,7 @@ python3.pkgs.buildPythonApplication rec {
   buildInputs = [
     qt6.qtbase
   ] ++
-  lib.optionals (stdenv.isLinux) [
+  lib.optionals (stdenv.hostPlatform.isLinux) [
     qt6.qtwayland
   ];
 
diff --git a/pkgs/by-name/re/revolt-desktop/package.nix b/pkgs/by-name/re/revolt-desktop/package.nix
index 7d8f0842a7a3..f941225770b2 100644
--- a/pkgs/by-name/re/revolt-desktop/package.nix
+++ b/pkgs/by-name/re/revolt-desktop/package.nix
@@ -31,7 +31,7 @@
     let
       inherit (prev) pname version;
     in
-    if stdenvNoCC.isLinux then
+    if stdenvNoCC.hostPlatform.isLinux then
       {
         src = fetchurl {
           url = "https://github.com/revoltchat/desktop/releases/download/v${version}/Revolt-linux.AppImage";
@@ -64,7 +64,7 @@
         '';
       }
     else
-      assert stdenvNoCC.isDarwin;
+      assert stdenvNoCC.hostPlatform.isDarwin;
       {
         src = fetchzip {
           url = "https://github.com/revoltchat/desktop/releases/download/v${version}/Revolt-${version}-mac.zip";
diff --git a/pkgs/by-name/ri/ride/package.nix b/pkgs/by-name/ri/ride/package.nix
index 9706b388dbf7..8c9f239dc1d8 100644
--- a/pkgs/by-name/ri/ride/package.nix
+++ b/pkgs/by-name/ri/ride/package.nix
@@ -89,14 +89,14 @@ buildNpmPackage rec {
       zip
       makeWrapper
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [ copyDesktopItems ]
-    ++ lib.optionals stdenv.isDarwin [ cctools ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ copyDesktopItems ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
 
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = "1";
 
   # Fix error: no member named 'aligned_alloc' in the global namespace
   env.NIX_CFLAGS_COMPILE = lib.optionalString (
-    stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0"
+    stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0"
   ) "-D_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION=1";
 
   npmBuildFlags = platformInfo.buildCmd;
@@ -122,7 +122,7 @@ buildNpmPackage rec {
 
     install -Dm644 ThirdPartyNotices.txt -t $out/share/doc/ride
 
-    ${lib.optionalString (!stdenv.isDarwin) ''
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       install -Dm644 $src/D.png $out/share/icons/hicolor/64x64/apps/ride.png
       install -Dm644 $src/D.svg $out/share/icons/hicolor/scalable/apps/ride.svg
 
@@ -134,7 +134,7 @@ buildNpmPackage rec {
           --inherit-argv0
     ''}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r Ride-*.app $out/Applications
       makeWrapper $out/Applications/Ride-*.app/Contents/MacOS/Ride-* $out/bin/ride
diff --git a/pkgs/by-name/ri/ringfairy/package.nix b/pkgs/by-name/ri/ringfairy/package.nix
index 1b4295d1f634..67563b58315c 100644
--- a/pkgs/by-name/ri/ringfairy/package.nix
+++ b/pkgs/by-name/ri/ringfairy/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs =
     [openssl]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks; [
         Security
         SystemConfiguration
diff --git a/pkgs/by-name/ri/ripunzip/package.nix b/pkgs/by-name/ri/ripunzip/package.nix
index 41d0594ebd5f..b8dfd3ff9c96 100644
--- a/pkgs/by-name/ri/ripunzip/package.nix
+++ b/pkgs/by-name/ri/ripunzip/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-QyVhEHm1W4kb5b4dngBui3lT7vKBGDS5ZObMWua96KM=";
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
   nativeBuildInputs = [ pkg-config ];
 
   setupHook = ./setup-hook.sh;
diff --git a/pkgs/by-name/rk/rkboot/package.nix b/pkgs/by-name/rk/rkboot/package.nix
index 5cf424a43c3a..f352446e7a1b 100644
--- a/pkgs/by-name/rk/rkboot/package.nix
+++ b/pkgs/by-name/rk/rkboot/package.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
     do
       # The proprietary, statically linked binaries to perform boot_merge are
       # x86_64 only. Though we use box64 to emulate if building on aarch64-linux
-      ${lib.optionalString stdenv.isAarch64 "${qemu}/bin/qemu-x86_64"} ./tools/boot_merger "$i" || true
+      ${lib.optionalString stdenv.hostPlatform.isAarch64 "${qemu}/bin/qemu-x86_64"} ./tools/boot_merger "$i" || true
     done
   '';
 
diff --git a/pkgs/by-name/rl/rl_json/package.nix b/pkgs/by-name/rl/rl_json/package.nix
index 81076dd07677..ac6e7950f411 100644
--- a/pkgs/by-name/rl/rl_json/package.nix
+++ b/pkgs/by-name/rl/rl_json/package.nix
@@ -41,6 +41,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ fgaz ];
     platforms = tcl.meta.platforms;
     # From version 0.15.1: 'endian.h' file not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/rm/rmg/package.nix b/pkgs/by-name/rm/rmg/package.nix
index 4dd9ac30d648..50c6e4306ffe 100644
--- a/pkgs/by-name/rm/rmg/package.nix
+++ b/pkgs/by-name/rm/rmg/package.nix
@@ -73,7 +73,7 @@ stdenv.mkDerivation rec {
     "-DUSE_ANGRYLION=${lib.boolToString withAngrylionRdpPlus}"
   ];
 
-  qtWrapperArgs = lib.optionals stdenv.isLinux [
+  qtWrapperArgs = lib.optionals stdenv.hostPlatform.isLinux [
     "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ vulkan-loader ]}"
   ] ++ lib.optional withWayland "--set RMG_WAYLAND 1";
 
diff --git a/pkgs/by-name/rn/rnote/package.nix b/pkgs/by-name/rn/rnote/package.nix
index 792c9faa0450..e2c569131ee2 100644
--- a/pkgs/by-name/rn/rnote/package.nix
+++ b/pkgs/by-name/rn/rnote/package.nix
@@ -75,9 +75,9 @@ stdenv.mkDerivation rec {
     libadwaita
     libxml2
     poppler
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AudioUnit
   ];
 
@@ -94,6 +94,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ dotlambda gepbird yrd ];
     platforms = platforms.unix;
     # compiler error since 2023-11-17
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ro/robodoc/package.nix b/pkgs/by-name/ro/robodoc/package.nix
index bc64a8315fe3..466554811720 100644
--- a/pkgs/by-name/ro/robodoc/package.nix
+++ b/pkgs/by-name/ro/robodoc/package.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-l3prSdaGhOvXmZfCPbsZJNocO7y20zJjLQpajRTJOqE=";
   };
 
-  postConfigure = lib.optionalString stdenv.isDarwin ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Docs/makefile.am \
       --replace 'man1_MANS = robodoc.1 robohdrs.1' 'man1_MANS ='
   '';
diff --git a/pkgs/by-name/ro/rootbar/package.nix b/pkgs/by-name/ro/rootbar/package.nix
index a528cd4a94ad..1901a33f11ff 100644
--- a/pkgs/by-name/ro/rootbar/package.nix
+++ b/pkgs/by-name/ro/rootbar/package.nix
@@ -42,6 +42,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ro/routinator/package.nix b/pkgs/by-name/ro/routinator/package.nix
index e7199164ddd7..14adef52117a 100644
--- a/pkgs/by-name/ro/routinator/package.nix
+++ b/pkgs/by-name/ro/routinator/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-1JxAbQPCQqDVry3wGIdY4q18rzCXlJ7Dnc8LIvhkW1g=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
 
   meta = with lib; {
     description = "RPKI Validator written in Rust";
diff --git a/pkgs/by-name/rp/rpi-imager/package.nix b/pkgs/by-name/rp/rpi-imager/package.nix
index 05a893cd0536..39a07b53d3c3 100644
--- a/pkgs/by-name/rp/rpi-imager/package.nix
+++ b/pkgs/by-name/rp/rpi-imager/package.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
       qt5.qttools
       xz
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       qt5.qtwayland
     ];
 
@@ -81,6 +81,6 @@ stdenv.mkDerivation (finalAttrs: {
     ];
     platforms = platforms.all;
     # does not build on darwin
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/rq/rqbit/package.nix b/pkgs/by-name/rq/rqbit/package.nix
index d02fe269203b..bdd27f02a896 100644
--- a/pkgs/by-name/rq/rqbit/package.nix
+++ b/pkgs/by-name/rq/rqbit/package.nix
@@ -18,10 +18,10 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   doCheck = false;
 
diff --git a/pkgs/by-name/rr/rrdtool/package.nix b/pkgs/by-name/rr/rrdtool/package.nix
index 733b981e4247..1a66700b17d9 100644
--- a/pkgs/by-name/rr/rrdtool/package.nix
+++ b/pkgs/by-name/rr/rrdtool/package.nix
@@ -28,7 +28,7 @@ perl.pkgs.toPerlModule (
     };
 
     # Fix darwin build
-    patches = lib.optional stdenv.isDarwin (fetchpatch {
+    patches = lib.optional stdenv.hostPlatform.isDarwin (fetchpatch {
       url = "https://github.com/oetiker/rrdtool-1.x/pull/1262.patch";
       hash = "sha256-aP0rmDlILn6VC8Tg7HpRXbxL9+KD/PRTbXnbQ7HgPEg=";
     });
@@ -47,7 +47,7 @@ perl.pkgs.toPerlModule (
         cairo
         groff
       ]
-      ++ lib.optionals stdenv.isDarwin [
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [
         tcl
         darwin.apple_sdk.frameworks.ApplicationServices
       ];
diff --git a/pkgs/by-name/rs/rs/package.nix b/pkgs/by-name/rs/rs/package.nix
index 5edd417375e7..ab5e4fcb4ddd 100644
--- a/pkgs/by-name/rs/rs/package.nix
+++ b/pkgs/by-name/rs/rs/package.nix
@@ -68,6 +68,6 @@ stdenv.mkDerivation rec {
     license = licenses.bsd3;
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.unix;
-    broken = stdenv.isx86_64 && stdenv.isDarwin; # missing strtonum()
+    broken = stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin; # missing strtonum()
   };
 }
diff --git a/pkgs/by-name/rt/rtl_fm_streamer/package.nix b/pkgs/by-name/rt/rtl_fm_streamer/package.nix
index 3e3fcde3b5f9..beb45686508a 100644
--- a/pkgs/by-name/rt/rtl_fm_streamer/package.nix
+++ b/pkgs/by-name/rt/rtl_fm_streamer/package.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   cmakeFlags = [
-    (lib.cmakeBool "INSTALL_UDEV_RULES" stdenv.isLinux)
+    (lib.cmakeBool "INSTALL_UDEV_RULES" stdenv.hostPlatform.isLinux)
   ];
 
   meta = {
@@ -45,6 +45,6 @@ stdenv.mkDerivation (finalAttrs: {
     homepage = "https://github.com/AlbrechtL/rtl_fm_streamer";
     license = lib.licenses.gpl2Plus;
     maintainers = with lib.maintainers; [ doronbehar ];
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 })
diff --git a/pkgs/by-name/ru/ruff-lsp/package.nix b/pkgs/by-name/ru/ruff-lsp/package.nix
index 7048c95859c8..344dce7755c6 100644
--- a/pkgs/by-name/ru/ruff-lsp/package.nix
+++ b/pkgs/by-name/ru/ruff-lsp/package.nix
@@ -40,7 +40,7 @@ python3.pkgs.buildPythonApplication rec {
   ];
 
   # fails in linux sandbox
-  doCheck = stdenv.isDarwin;
+  doCheck = stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = with python3.pkgs; [
     pytestCheckHook
diff --git a/pkgs/by-name/ru/ruff/package.nix b/pkgs/by-name/ru/ruff/package.nix
index ab16ddf240d7..67099b3ecde1 100644
--- a/pkgs/by-name/ru/ruff/package.nix
+++ b/pkgs/by-name/ru/ruff/package.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     rust-jemalloc-sys
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd ruff \
@@ -53,7 +53,7 @@ rustPlatform.buildRustPackage rec {
   # Failing on darwin for an unclear reason.
   # According to the maintainers, those tests are from an experimental crate that isn't actually
   # used by ruff currently and can thus be safely skipped.
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--skip=changed_file"
     "--skip=changed_metadata"
     "--skip=changed_versions_file"
diff --git a/pkgs/by-name/ru/rustdesk/package.nix b/pkgs/by-name/ru/rustdesk/package.nix
index 5b838d39cff8..b038c6c38333 100644
--- a/pkgs/by-name/ru/rustdesk/package.nix
+++ b/pkgs/by-name/ru/rustdesk/package.nix
@@ -106,7 +106,7 @@ rustPlatform.buildRustPackage rec {
     wrapGAppsHook3
   ];
 
-  buildFeatures = lib.optionals stdenv.isLinux [ "linux-pkg-config" ];
+  buildFeatures = lib.optionals stdenv.hostPlatform.isLinux [ "linux-pkg-config" ];
 
   # Checks require an active X server
   doCheck = false;
@@ -136,7 +136,7 @@ rustPlatform.buildRustPackage rec {
       zlib
       zstd
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AppKit
@@ -149,7 +149,7 @@ rustPlatform.buildRustPackage rec {
         SystemConfiguration
       ]
     )
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
       xdotool
     ];
@@ -161,7 +161,7 @@ rustPlatform.buildRustPackage rec {
 
     # .so needs to be next to the executable
     mv $out/bin/rustdesk $out/lib/rustdesk
-    ${lib.optionalString stdenv.isLinux "ln -s ${libsciter}/lib/libsciter-gtk.so $out/lib/rustdesk"}
+    ${lib.optionalString stdenv.hostPlatform.isLinux "ln -s ${libsciter}/lib/libsciter-gtk.so $out/lib/rustdesk"}
 
     makeWrapper $out/lib/rustdesk/rustdesk $out/bin/rustdesk \
       --chdir "$out/share"
@@ -171,7 +171,7 @@ rustPlatform.buildRustPackage rec {
     install -Dm0644 $src/res/logo.svg $out/share/icons/hicolor/scalable/apps/rustdesk.svg
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --add-rpath "${libayatana-appindicator}/lib" "$out/lib/rustdesk/rustdesk"
   '';
 
diff --git a/pkgs/by-name/ru/rusti-cal/package.nix b/pkgs/by-name/ru/rusti-cal/package.nix
index 97b5e107314d..f03783cbc5e2 100644
--- a/pkgs/by-name/ru/rusti-cal/package.nix
+++ b/pkgs/by-name/ru/rusti-cal/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-5eS+OMaNAVNyDMKFNfb0J0rLsikw2LCXhWk7MS9UV2k=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/ru/rustic/package.nix b/pkgs/by-name/ru/rustic/package.nix
index 2578991fc8f4..14f1c30ace13 100644
--- a/pkgs/by-name/ru/rustic/package.nix
+++ b/pkgs/by-name/ru/rustic/package.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/by-name/ru/rustlings/package.nix b/pkgs/by-name/ru/rustlings/package.nix
index b66d2ced7e12..2d51df275234 100644
--- a/pkgs/by-name/ru/rustlings/package.nix
+++ b/pkgs/by-name/ru/rustlings/package.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage {
     makeWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreServices ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ CoreServices ]);
 
   postFixup = ''
     wrapProgram $out/bin/rustlings --suffix PATH : ${
diff --git a/pkgs/by-name/ru/rustls-ffi/package.nix b/pkgs/by-name/ru/rustls-ffi/package.nix
index 015a3b9a72c9..e5317b40b78c 100644
--- a/pkgs/by-name/ru/rustls-ffi/package.nix
+++ b/pkgs/by-name/ru/rustls-ffi/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-gDQ9AFrJuV7SrzKCAHQBkKj6clXuPLO0DHhnvcBqRLs=";
   };
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.Security ];
 
   nativeBuildInputs = [ cargo rustPlatform.cargoSetupHook cargo-c validatePkgConfig ];
 
diff --git a/pkgs/by-name/ru/rustmission/package.nix b/pkgs/by-name/ru/rustmission/package.nix
index 8e8a21d8596b..241a0b71dc63 100644
--- a/pkgs/by-name/ru/rustmission/package.nix
+++ b/pkgs/by-name/ru/rustmission/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/ry/rye/package.nix b/pkgs/by-name/ry/rye/package.nix
index 3719ae8988e8..c04802847f16 100644
--- a/pkgs/by-name/ry/rye/package.nix
+++ b/pkgs/by-name/ry/rye/package.nix
@@ -48,7 +48,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk;
       [
         frameworks.CoreServices
diff --git a/pkgs/by-name/s3/s3proxy/package.nix b/pkgs/by-name/s3/s3proxy/package.nix
index 72f18af79cc1..d24f3728da11 100644
--- a/pkgs/by-name/s3/s3proxy/package.nix
+++ b/pkgs/by-name/s3/s3proxy/package.nix
@@ -21,7 +21,7 @@ maven.buildMavenPackage {
     hash = "sha256-GhZPvo8wlXInHwg8rSmpwMMkZVw5SMpnZyKqFUYLbrE=";
   };
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeBuildInputs = [ makeWrapper ];
 
diff --git a/pkgs/by-name/sa/saga/package.nix b/pkgs/by-name/sa/saga/package.nix
index 43af7ef6b649..ae4670a002bb 100644
--- a/pkgs/by-name/sa/saga/package.nix
+++ b/pkgs/by-name/sa/saga/package.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     curl
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
   ]
   # See https://groups.google.com/forum/#!topic/nix-devel/h_vSzEJAPXs
   # for why the have additional buildInputs on darwin
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     unixODBC
     poppler
@@ -74,7 +74,7 @@ stdenv.mkDerivation rec {
   ];
 
   cmakeFlags = [
-    (lib.cmakeBool "OpenMP_SUPPORT" (!stdenv.isDarwin))
+    (lib.cmakeBool "OpenMP_SUPPORT" (!stdenv.hostPlatform.isDarwin))
   ];
 
   meta = with lib; {
diff --git a/pkgs/by-name/sa/salmon/package.nix b/pkgs/by-name/sa/salmon/package.nix
index 09a2fec4c257..bfc12deedd6b 100644
--- a/pkgs/by-name/sa/salmon/package.nix
+++ b/pkgs/by-name/sa/salmon/package.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
     tbb_2021_11
     xz
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeBuildInputs = [ cmake pkg-config ];
 
diff --git a/pkgs/by-name/sa/sanjuuni/package.nix b/pkgs/by-name/sa/sanjuuni/package.nix
index 231714941462..f8577d3b8a15 100644
--- a/pkgs/by-name/sa/sanjuuni/package.nix
+++ b/pkgs/by-name/sa/sanjuuni/package.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     changelog = "https://github.com/MCJack123/sanjuuni/releases/tag/${version}";
     maintainers = [ maintainers.tomodachi94 ];
     license = licenses.gpl2Plus;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "sanjuuni";
   };
 }
diff --git a/pkgs/by-name/sa/sarif-fmt/package.nix b/pkgs/by-name/sa/sarif-fmt/package.nix
index 37e59c4a332b..6e3a236ed4e9 100644
--- a/pkgs/by-name/sa/sarif-fmt/package.nix
+++ b/pkgs/by-name/sa/sarif-fmt/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
   # `test_clippy` (the only test we enable) is broken on Darwin
   # because `--enable-profiler` is not enabled in rustc on Darwin
   # error[E0463]: can't find crate for profiler_builtins
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkFlags = [
     # these tests use nix so...no go
diff --git a/pkgs/by-name/sc/schemamap/package.nix b/pkgs/by-name/sc/schemamap/package.nix
index 95908de6e1c6..081cee9a23f6 100644
--- a/pkgs/by-name/sc/schemamap/package.nix
+++ b/pkgs/by-name/sc/schemamap/package.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk;
       [
         frameworks.Security
diff --git a/pkgs/by-name/sc/scrcpy/package.nix b/pkgs/by-name/sc/scrcpy/package.nix
index 06779e7c761d..0deceb3f8c4a 100644
--- a/pkgs/by-name/sc/scrcpy/package.nix
+++ b/pkgs/by-name/sc/scrcpy/package.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
 
     # runtime dep on `adb` to push the server
     wrapProgram "$out/bin/scrcpy" --prefix PATH : "${android-tools}/bin"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace $out/share/applications/scrcpy-console.desktop \
       --replace "/bin/bash" "${runtimeShell}"
   '';
diff --git a/pkgs/by-name/sc/screen-pipe/package.nix b/pkgs/by-name/sc/screen-pipe/package.nix
index b851c49a5808..141eca8d82c7 100644
--- a/pkgs/by-name/sc/screen-pipe/package.nix
+++ b/pkgs/by-name/sc/screen-pipe/package.nix
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
       openssl
       sqlite
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk_12_3.frameworks;
       [
         CoreAudio
@@ -65,12 +65,12 @@ rustPlatform.buildRustPackage rec {
         SystemConfiguration
       ]
     )
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
       xorg.libxcb
     ];
 
-  buildFeatures = lib.optional stdenv.isDarwin "metal";
+  buildFeatures = lib.optional stdenv.hostPlatform.isDarwin "metal";
 
   env = {
     RUSTONIG_SYSTEM_LIBONIG = true;
diff --git a/pkgs/by-name/sc/screenly-cli/package.nix b/pkgs/by-name/sc/screenly-cli/package.nix
index 9cc2cd511ef8..b93266bbdc25 100644
--- a/pkgs/by-name/sc/screenly-cli/package.nix
+++ b/pkgs/by-name/sc/screenly-cli/package.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/by-name/sc/scs/package.nix b/pkgs/by-name/sc/scs/package.nix
index 49911355e2db..1ba3eb5912b8 100644
--- a/pkgs/by-name/sc/scs/package.nix
+++ b/pkgs/by-name/sc/scs/package.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
       --replace "gcc" "cc"
   '';
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   buildInputs = [
     blas
diff --git a/pkgs/by-name/sd/SDL1/package.nix b/pkgs/by-name/sd/SDL1/package.nix
index 7abff886d509..bd793b5885bb 100644
--- a/pkgs/by-name/sd/SDL1/package.nix
+++ b/pkgs/by-name/sd/SDL1/package.nix
@@ -16,11 +16,11 @@
 , pkg-config
 , stdenv
 # Boolean flags
-, alsaSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid
+, alsaSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid
 , libGLSupported ? lib.meta.availableOn stdenv.hostPlatform libGL
 , openglSupport ? libGLSupported
-, pulseaudioSupport ? config.pulseaudio or stdenv.isLinux && !stdenv.hostPlatform.isAndroid && lib.meta.availableOn stdenv.hostPlatform libpulseaudio
-, x11Support ? !stdenv.isCygwin && !stdenv.hostPlatform.isAndroid
+, pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid && lib.meta.availableOn stdenv.hostPlatform libpulseaudio
+, x11Support ? !stdenv.hostPlatform.isCygwin && !stdenv.hostPlatform.isAndroid
 }:
 
 # NOTE: When editing this expression see if the same change applies to
@@ -30,13 +30,13 @@ let
   inherit (darwin.apple_sdk.frameworks) OpenGL CoreAudio CoreServices AudioUnit Kernel Cocoa GLUT;
   extraPropagatedBuildInputs = [ ]
     ++ lib.optionals x11Support [ libXext libICE libXrandr ]
-    ++ lib.optionals (openglSupport && stdenv.isLinux) [ libGL ]
+    ++ lib.optionals (openglSupport && stdenv.hostPlatform.isLinux) [ libGL ]
     # libGLU doesn’t work with Android's SDL
-    ++ lib.optionals (openglSupport && stdenv.isLinux && (!stdenv.hostPlatform.isAndroid)) [ libGLU ]
-    ++ lib.optionals (openglSupport && stdenv.isDarwin) [ OpenGL GLUT ]
+    ++ lib.optionals (openglSupport && stdenv.hostPlatform.isLinux && (!stdenv.hostPlatform.isAndroid)) [ libGLU ]
+    ++ lib.optionals (openglSupport && stdenv.hostPlatform.isDarwin) [ OpenGL GLUT ]
     ++ lib.optional alsaSupport alsa-lib
     ++ lib.optional pulseaudioSupport libpulseaudio
-    ++ lib.optional stdenv.isDarwin Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "SDL";
@@ -51,14 +51,14 @@ stdenv.mkDerivation (finalAttrs: {
   outputBin = "dev"; # sdl-config
 
   nativeBuildInputs = [ pkg-config ]
-    ++ lib.optional stdenv.isLinux libcap;
+    ++ lib.optional stdenv.hostPlatform.isLinux libcap;
 
   propagatedBuildInputs = [ libiconv ] ++ extraPropagatedBuildInputs;
 
   buildInputs =
     [ ]
     ++ lib.optionals (!stdenv.hostPlatform.isMinGW && alsaSupport) [ audiofile ]
-    ++ lib.optionals stdenv.isDarwin [ AudioUnit CoreAudio CoreServices Kernel OpenGL ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioUnit CoreAudio CoreServices Kernel OpenGL ];
 
   configureFlags = [
     "--disable-oss"
@@ -70,7 +70,7 @@ stdenv.mkDerivation (finalAttrs: {
   #   SDL_X11_SYM(int,_XData32,(Display *dpy,register long *data,unsigned len),(dpy,data,len),return)
   #
   # Please try revert the change that introduced this comment when updating SDL.
-  ] ++ lib.optional stdenv.isDarwin "--disable-x11-shared"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-x11-shared"
     ++ lib.optional (!x11Support) "--without-x"
     ++ lib.optional alsaSupport "--with-alsa-prefix=${alsa-lib.out}/lib"
     ++ lib.optional stdenv.hostPlatform.isMusl "CFLAGS=-DICONV_INBUF_NONCONST";
diff --git a/pkgs/by-name/sd/SDL2_Pango/package.nix b/pkgs/by-name/sd/SDL2_Pango/package.nix
index 9fbee142d6b9..755c0a1af463 100644
--- a/pkgs/by-name/sd/SDL2_Pango/package.nix
+++ b/pkgs/by-name/sd/SDL2_Pango/package.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     SDL2
     freetype
     pango
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
diff --git a/pkgs/by-name/sd/SDL2_gfx/package.nix b/pkgs/by-name/sd/SDL2_gfx/package.nix
index d74d859fefcb..b5a68c23e49b 100644
--- a/pkgs/by-name/sd/SDL2_gfx/package.nix
+++ b/pkgs/by-name/sd/SDL2_gfx/package.nix
@@ -7,7 +7,7 @@
   testers,
   # Boolean flags
   enableMmx ? stdenv.hostPlatform.isx86,
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     SDL2
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
diff --git a/pkgs/by-name/sd/SDL2_image/package.nix b/pkgs/by-name/sd/SDL2_image/package.nix
index 2af81bd18cb7..19028ab115a0 100644
--- a/pkgs/by-name/sd/SDL2_image/package.nix
+++ b/pkgs/by-name/sd/SDL2_image/package.nix
@@ -14,7 +14,7 @@
   zlib,
   # Boolean flags
   ## Darwin headless will hang when trying to run the SDL test program
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 let
@@ -43,7 +43,7 @@ stdenv.mkDerivation (finalAttrs: {
     libtiff
     libwebp
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ Foundation ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   configureFlags = [
     # Disable dynamically loaded dependencies
@@ -52,9 +52,9 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.enableFeature false "tif-shared")
     (lib.enableFeature false "webp-shared")
     (lib.enableFeature enableSdltest "sdltest")
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Don't use native macOS frameworks
-    # Caution: do not set this as (!stdenv.isDarwin) since it would be true
+    # Caution: do not set this as (!stdenv.hostPlatform.isDarwin) since it would be true
     # outside Darwin - and ImageIO does not exist outisde Darwin
     (lib.enableFeature false "imageio")
   ];
diff --git a/pkgs/by-name/sd/SDL2_mixer/package.nix b/pkgs/by-name/sd/SDL2_mixer/package.nix
index 976dc2f5fa92..bd2894f5583d 100644
--- a/pkgs/by-name/sd/SDL2_mixer/package.nix
+++ b/pkgs/by-name/sd/SDL2_mixer/package.nix
@@ -15,8 +15,8 @@
   stdenv,
   timidity,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin),
-  enableSmpegtest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
+  enableSmpegtest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 let
@@ -38,7 +38,7 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AudioToolbox
     AudioUnit
     CoreServices
diff --git a/pkgs/by-name/sd/SDL2_net/package.nix b/pkgs/by-name/sd/SDL2_net/package.nix
index 0214e2cd5b4b..0325e6aa4c12 100644
--- a/pkgs/by-name/sd/SDL2_net/package.nix
+++ b/pkgs/by-name/sd/SDL2_net/package.nix
@@ -6,7 +6,7 @@
   pkg-config,
   stdenv,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
diff --git a/pkgs/by-name/sd/SDL2_sound/package.nix b/pkgs/by-name/sd/SDL2_sound/package.nix
index d67db20695db..46517c42cb32 100644
--- a/pkgs/by-name/sd/SDL2_sound/package.nix
+++ b/pkgs/by-name/sd/SDL2_sound/package.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [ "-DSDLSOUND_DECODER_MIDI=1" ];
 
   buildInputs = [ SDL2 flac libmikmod libvorbis timidity ]
-    ++ lib.optionals stdenv.isDarwin [ AudioToolbox CoreAudio ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioToolbox CoreAudio ];
 
   meta = with lib; {
     description = "SDL2 sound library";
diff --git a/pkgs/by-name/sd/SDL2_ttf/package.nix b/pkgs/by-name/sd/SDL2_ttf/package.nix
index 140c104bcb44..dcc5fee21f33 100644
--- a/pkgs/by-name/sd/SDL2_ttf/package.nix
+++ b/pkgs/by-name/sd/SDL2_ttf/package.nix
@@ -10,7 +10,7 @@
   stdenv,
   testers,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -32,10 +32,10 @@ stdenv.mkDerivation (finalAttrs: {
     freetype
     harfbuzz
   ]
-  ++ lib.optionals (!stdenv.isDarwin) [
+  ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libGL
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
   ];
 
diff --git a/pkgs/by-name/sd/SDL_Pango/package.nix b/pkgs/by-name/sd/SDL_Pango/package.nix
index 8c4160d98684..78e5d40d0a90 100644
--- a/pkgs/by-name/sd/SDL_Pango/package.nix
+++ b/pkgs/by-name/sd/SDL_Pango/package.nix
@@ -8,7 +8,7 @@
   pkg-config,
   stdenv,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/sd/SDL_compat/package.nix b/pkgs/by-name/sd/SDL_compat/package.nix
index a2ac5f6d2887..ac7d8ff68b81 100644
--- a/pkgs/by-name/sd/SDL_compat/package.nix
+++ b/pkgs/by-name/sd/SDL_compat/package.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ cmake pkg-config ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ];
 
   propagatedBuildInputs = [ SDL2 ]
     ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Cocoa ]
diff --git a/pkgs/by-name/sd/SDL_gfx/package.nix b/pkgs/by-name/sd/SDL_gfx/package.nix
index 558e1943a14b..5677d62b7b93 100644
--- a/pkgs/by-name/sd/SDL_gfx/package.nix
+++ b/pkgs/by-name/sd/SDL_gfx/package.nix
@@ -4,7 +4,7 @@
   fetchurl,
   stdenv,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/sd/SDL_image/package.nix b/pkgs/by-name/sd/SDL_image/package.nix
index ce6824b09d0b..fdd0b5f373ac 100644
--- a/pkgs/by-name/sd/SDL_image/package.nix
+++ b/pkgs/by-name/sd/SDL_image/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.enableFeature false "png-shared")
     (lib.enableFeature false "tif-shared")
     (lib.enableFeature false "webp-shared")
-    (lib.enableFeature (!stdenv.isDarwin) "sdltest")
+    (lib.enableFeature (!stdenv.hostPlatform.isDarwin) "sdltest")
   ];
 
   nativeBuildInputs = [
diff --git a/pkgs/by-name/sd/SDL_mixer/package.nix b/pkgs/by-name/sd/SDL_mixer/package.nix
index 470bd5559d7c..84af162a7384 100644
--- a/pkgs/by-name/sd/SDL_mixer/package.nix
+++ b/pkgs/by-name/sd/SDL_mixer/package.nix
@@ -12,8 +12,8 @@
   stdenv,
   # Boolean flags
   enableNativeMidi ? false,
-  enableSdltest ? (!stdenv.isDarwin),
-  enableSmpegtest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
+  enableSmpegtest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/sd/SDL_net/package.nix b/pkgs/by-name/sd/SDL_net/package.nix
index 4d45ff624e8f..369f956fdf94 100644
--- a/pkgs/by-name/sd/SDL_net/package.nix
+++ b/pkgs/by-name/sd/SDL_net/package.nix
@@ -5,7 +5,7 @@
   pkg-config,
   stdenv,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin)
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin)
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/sd/SDL_sound/package.nix b/pkgs/by-name/sd/SDL_sound/package.nix
index b5e93b3efdf2..e2fd8000c546 100644
--- a/pkgs/by-name/sd/SDL_sound/package.nix
+++ b/pkgs/by-name/sd/SDL_sound/package.nix
@@ -7,7 +7,7 @@
   libvorbis,
   stdenv,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin)
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin)
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/sd/SDL_ttf/package.nix b/pkgs/by-name/sd/SDL_ttf/package.nix
index a44aeaa7f05b..bd40d331b9b9 100644
--- a/pkgs/by-name/sd/SDL_ttf/package.nix
+++ b/pkgs/by-name/sd/SDL_ttf/package.nix
@@ -6,7 +6,7 @@
   freetype,
   stdenv,
   # Boolean flags
-  enableSdltest ? (!stdenv.isDarwin),
+  enableSdltest ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/se/selenium-manager/package.nix b/pkgs/by-name/se/selenium-manager/package.nix
index 47b6e2c16c16..4877804ef897 100644
--- a/pkgs/by-name/se/selenium-manager/package.nix
+++ b/pkgs/by-name/se/selenium-manager/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-1CPUOAfBfUeZt5S8t5SM3oyrNwXKHplhHG5idVy4YrE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/se/sendme/package.nix b/pkgs/by-name/se/sendme/package.nix
index e355dd99f317..ea5d670af8a2 100644
--- a/pkgs/by-name/se/sendme/package.nix
+++ b/pkgs/by-name/se/sendme/package.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-U2/GUpWtpTX+RCBojh3N6DsWB0gjFkH1mGA+AS+fH+o=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks; [
       SystemConfiguration
     ]
diff --git a/pkgs/by-name/se/sequoia-sq/package.nix b/pkgs/by-name/se/sequoia-sq/package.nix
index 4183e235286f..5de7ab47962c 100644
--- a/pkgs/by-name/se/sequoia-sq/package.nix
+++ b/pkgs/by-name/se/sequoia-sq/package.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     sqlite
     nettle
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
 
   checkFlags = [
     # https://gitlab.com/sequoia-pgp/sequoia-sq/-/issues/297
diff --git a/pkgs/by-name/se/sequoia-wot/package.nix b/pkgs/by-name/se/sequoia-wot/package.nix
index d95066972cb8..09ae4d8bd9f2 100644
--- a/pkgs/by-name/se/sequoia-wot/package.nix
+++ b/pkgs/by-name/se/sequoia-wot/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
     # See comment near sequoia-openpgp/crypto- buildFeatures
   ] ++ lib.optionals (!stdenv.targetPlatform.isWindows) [
diff --git a/pkgs/by-name/se/serie/package.nix b/pkgs/by-name/se/serie/package.nix
index 516756d12c77..e59723c24ec7 100644
--- a/pkgs/by-name/se/serie/package.nix
+++ b/pkgs/by-name/se/serie/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-HxIyWlFKDRod5nSENZguNYz/vn+E9Ux0K3dMhX7I/zQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks;
     [
       CoreGraphics
diff --git a/pkgs/by-name/se/servo/package.nix b/pkgs/by-name/se/servo/package.nix
index de7efca2767f..fc586d5ddcd9 100644
--- a/pkgs/by-name/se/servo/package.nix
+++ b/pkgs/by-name/se/servo/package.nix
@@ -130,7 +130,7 @@ rustPlatform.buildRustPackage {
     libGL
     xorg.libX11
     xorg.libxcb
-  ] ++ (lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AppKit ]);
+  ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AppKit ]);
 
   # copy resources into `$out` to be used during runtime
   # link runtime libraries
diff --git a/pkgs/by-name/sg/sgfutils/package.nix b/pkgs/by-name/sg/sgfutils/package.nix
index f82bc4e59a6a..586a3ab1e096 100644
--- a/pkgs/by-name/sg/sgfutils/package.nix
+++ b/pkgs/by-name/sg/sgfutils/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation
     hash = "sha256-KWYgTxz32WK3MKouj1WAJtZmleKt5giCpzQPwfWruZQ=";
   };
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
   buildPhase = ''
     runHook preBuild
     make all
diff --git a/pkgs/by-name/sh/share-preview/package.nix b/pkgs/by-name/sh/share-preview/package.nix
index 093bbaf33270..4f3cda10bd76 100644
--- a/pkgs/by-name/sh/share-preview/package.nix
+++ b/pkgs/by-name/sh/share-preview/package.nix
@@ -46,13 +46,13 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     libadwaita
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
   env.NIX_CFLAGS_COMPILE = toString (
-    lib.optionals stdenv.isDarwin [ "-Wno-error=incompatible-function-pointer-types" ]
+    lib.optionals stdenv.hostPlatform.isDarwin [ "-Wno-error=incompatible-function-pointer-types" ]
   );
 
   meta = {
diff --git a/pkgs/by-name/si/signal-backup-deduplicator/package.nix b/pkgs/by-name/si/signal-backup-deduplicator/package.nix
index d5efff9e3f4d..5c098d7d46df 100644
--- a/pkgs/by-name/si/signal-backup-deduplicator/package.nix
+++ b/pkgs/by-name/si/signal-backup-deduplicator/package.nix
@@ -33,6 +33,6 @@ stdenv.mkDerivation {
     mainProgram = "signal_backup_deduplicate";
     platforms = lib.platforms.all;
     # ld: symbol(s) not found for architecture ...
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/si/silicon/package.nix b/pkgs/by-name/si/silicon/package.nix
index cba16e706b8c..0c77d93b5a00 100644
--- a/pkgs/by-name/si/silicon/package.nix
+++ b/pkgs/by-name/si/silicon/package.nix
@@ -40,8 +40,8 @@ rustPlatform.buildRustPackage rec {
   '';
 
   buildInputs = [ expat freetype fira-code fontconfig harfbuzz ]
-    ++ lib.optionals stdenv.isLinux [ libxcb ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libxcb ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       libiconv
       AppKit
       CoreText
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
     ]);
 
   nativeBuildInputs = [ cmake pkg-config rustPlatform.bindgenHook ]
-    ++ lib.optionals stdenv.isLinux [ python3 ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ python3 ];
 
   preCheck = ''
     export HOME=$TMPDIR
diff --git a/pkgs/by-name/si/single-file-cli/package.nix b/pkgs/by-name/si/single-file-cli/package.nix
index d6aa4d28a7d8..0af72089592a 100644
--- a/pkgs/by-name/si/single-file-cli/package.nix
+++ b/pkgs/by-name/si/single-file-cli/package.nix
@@ -19,7 +19,7 @@ buildNpmPackage {
   npmDepsHash = "sha256-wiBpWw9nb/pWVGIc4Vl/IxxR5ic0LzLMMr3WxRNvYdM=";
 
   nativeCheckInputs = [chromium];
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   postBuild = ''
     patchShebangs ./single-file
diff --git a/pkgs/by-name/si/sirius/package.nix b/pkgs/by-name/si/sirius/package.nix
index 34ee961d1404..d437eece8b21 100644
--- a/pkgs/by-name/si/sirius/package.nix
+++ b/pkgs/by-name/si/sirius/package.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals (gpuBackend == "rocm") [
     rocmPackages.clr
     rocmPackages.rocblas
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.openmp
   ] ++ lib.optionals enablePython (with pythonPackages; [
     python
diff --git a/pkgs/by-name/sk/sketchybar/package.nix b/pkgs/by-name/sk/sketchybar/package.nix
index 0b1b4e21acd1..e0e2a004e6d7 100644
--- a/pkgs/by-name/sk/sketchybar/package.nix
+++ b/pkgs/by-name/sk/sketchybar/package.nix
@@ -29,7 +29,7 @@ let
     }
     .${system} or (throw "Unsupported system: ${system}");
 
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   pname = "sketchybar";
diff --git a/pkgs/by-name/sk/skhd/package.nix b/pkgs/by-name/sk/skhd/package.nix
index d3b3b9adb96a..1876a43916a7 100644
--- a/pkgs/by-name/sk/skhd/package.nix
+++ b/pkgs/by-name/sk/skhd/package.nix
@@ -10,7 +10,7 @@
 let
   inherit (darwin.apple_sdk_11_0.frameworks) Carbon Cocoa;
 
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   pname = "skhd";
diff --git a/pkgs/by-name/sk/skia/package.nix b/pkgs/by-name/sk/skia/package.nix
index a6972b628bd8..2790b77101d5 100644
--- a/pkgs/by-name/sk/skia/package.nix
+++ b/pkgs/by-name/sk/skia/package.nix
@@ -18,7 +18,7 @@
 , vulkan-memory-allocator
 , xcbuild
 
-, enableVulkan ? !stdenv.isDarwin
+, enableVulkan ? !stdenv.hostPlatform.isDarwin
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
     gn
     ninja
     python3
-  ] ++ lib.optional stdenv.isDarwin xcbuild;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin xcbuild;
 
   buildInputs = [
     expat
@@ -145,6 +145,6 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = with lib.platforms; arm ++ aarch64 ++ x86 ++ x86_64;
     pkgConfigModules = [ "skia" ];
     # https://github.com/NixOS/nixpkgs/pull/325871#issuecomment-2220610016
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/sk/skribilo/package.nix b/pkgs/by-name/sk/skribilo/package.nix
index 9602ff7d167e..63083457bee5 100644
--- a/pkgs/by-name/sk/skribilo/package.nix
+++ b/pkgs/by-name/sk/skribilo/package.nix
@@ -11,8 +11,8 @@
 , makeWrapper
 , pkg-config
 , enableEmacs ? false, emacs
-, enableLout ? stdenv.isLinux, lout
-, enablePloticus ? stdenv.isLinux, ploticus
+, enableLout ? stdenv.hostPlatform.isLinux, lout
+, enablePloticus ? stdenv.hostPlatform.isLinux, ploticus
 , enableTex ? true, texliveSmall
 }:
 
diff --git a/pkgs/by-name/sl/slang/package.nix b/pkgs/by-name/sl/slang/package.nix
index 162bc8395d99..7d67d22eb3e0 100644
--- a/pkgs/by-name/sl/slang/package.nix
+++ b/pkgs/by-name/sl/slang/package.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     pcre
     readline
     zlib
-  ] ++ lib.optionals (stdenv.isDarwin) [ libiconv ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ libiconv ];
 
   propagatedBuildInputs = [ ncurses ];
 
diff --git a/pkgs/by-name/sl/slimserver/package.nix b/pkgs/by-name/sl/slimserver/package.nix
index b88f72b0d118..abdb045e7ced 100644
--- a/pkgs/by-name/sl/slimserver/package.nix
+++ b/pkgs/by-name/sl/slimserver/package.nix
@@ -24,7 +24,7 @@ let
       sox
       wavpack
     ]
-    ++ (lib.optional stdenv.isLinux monkeysAudio)
+    ++ (lib.optional stdenv.hostPlatform.isLinux monkeysAudio)
   );
   libPath = lib.makeLibraryPath [
     zlib
@@ -117,8 +117,8 @@ perlPackages.buildPerlPackage rec {
       XMLSimple
       YAMLLibYAML
     ]
-    # ++ (lib.optional stdenv.isDarwin perlPackages.MacFSEvents)
-    ++ (lib.optional stdenv.isLinux perlPackages.LinuxInotify2);
+    # ++ (lib.optional stdenv.hostPlatform.isDarwin perlPackages.MacFSEvents)
+    ++ (lib.optional stdenv.hostPlatform.isLinux perlPackages.LinuxInotify2);
 
   prePatch = ''
     # remove vendored binaries
@@ -179,6 +179,6 @@ perlPackages.buildPerlPackage rec {
       jecaro
     ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/sl/slumber/package.nix b/pkgs/by-name/sl/slumber/package.nix
index b65e041cdc24..aed0f3848c42 100644
--- a/pkgs/by-name/sl/slumber/package.nix
+++ b/pkgs/by-name/sl/slumber/package.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-jLBid9MDQ2eMhG0knxU1gxbi+eRFlCPYRkzWnjCnyG0=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AppKit ];
 
   meta = with lib; {
     description = "Terminal-based HTTP/REST client";
diff --git a/pkgs/by-name/sm/smartcat/package.nix b/pkgs/by-name/sm/smartcat/package.nix
index bc81bfd0a2db..fb7195bfeaee 100644
--- a/pkgs/by-name/sm/smartcat/package.nix
+++ b/pkgs/by-name/sm/smartcat/package.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     libX11
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/sm/smuview/package.nix b/pkgs/by-name/sm/smuview/package.nix
index 907e332279ca..a030d649992d 100644
--- a/pkgs/by-name/sm/smuview/package.nix
+++ b/pkgs/by-name/sm/smuview/package.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake pkg-config qt5.wrapQtAppsHook ]
-    ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+    ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   buildInputs = [
     glib
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     python3
     pcre
     libsForQt5.qwt
-  ] ++ lib.optionals stdenv.isLinux [ bluez ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ bluez ];
 
   meta = with lib; {
     description = "Qt based source measure unit GUI for sigrok";
diff --git a/pkgs/by-name/sm/smuxi/package.nix b/pkgs/by-name/sm/smuxi/package.nix
index 40ae39deee0f..72354275e398 100644
--- a/pkgs/by-name/sm/smuxi/package.nix
+++ b/pkgs/by-name/sm/smuxi/package.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   pname = "smuxi";
   version = "unstable-2023-07-01";
 
-  runtimeLoaderEnvVariableName = if stdenv.isDarwin then
+  runtimeLoaderEnvVariableName = if stdenv.hostPlatform.isDarwin then
                                    "DYLD_FALLBACK_LIBRARY_PATH"
                                  else
                                    "LD_LIBRARY_PATH";
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
     cp -a lib/Nini.dll $out/lib/smuxi/
 
     # install GTK+ icon theme on Darwin
-    ${if guiSupport && stdenv.isDarwin then "
+    ${if guiSupport && stdenv.hostPlatform.isDarwin then "
       mkdir -p $out/lib/smuxi/icons/
       cp -a images/Smuxi-Symbolic $out/lib/smuxi/icons/
     " else ""}
diff --git a/pkgs/by-name/sn/sn0int/package.nix b/pkgs/by-name/sn/sn0int/package.nix
index 974f6a298d1e..6e9afcd4a149 100644
--- a/pkgs/by-name/sn/sn0int/package.nix
+++ b/pkgs/by-name/sn/sn0int/package.nix
@@ -31,9 +31,9 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libsodium
     sqlite
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libseccomp
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     pkgs.darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/sn/snapcraft/package.nix b/pkgs/by-name/sn/snapcraft/package.nix
index 9c6add8c197b..ad2eb1c0b7fc 100644
--- a/pkgs/by-name/sn/snapcraft/package.nix
+++ b/pkgs/by-name/sn/snapcraft/package.nix
@@ -196,7 +196,7 @@ python.pkgs.buildPythonApplication rec {
     "test_snap_command_fallback"
     "test_validate_architectures_supported"
     "test_validate_architectures_unsupported"
-  ] ++ lib.optionals stdenv.isAarch64 [ "test_load_project" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [ "test_load_project" ];
 
   disabledTestPaths = [
     "tests/unit/commands/test_remote.py"
diff --git a/pkgs/by-name/sn/snes9x/package.nix b/pkgs/by-name/sn/snes9x/package.nix
index 1888a2df4186..31aa73db6a92 100644
--- a/pkgs/by-name/sn/snes9x/package.nix
+++ b/pkgs/by-name/sn/snes9x/package.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation (finalAttrs: {
     minizip
     zlib
   ]
-  ++ lib.optionals stdenv.isLinux [
+  ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     pulseaudio
     libselinux
@@ -137,6 +137,6 @@ stdenv.mkDerivation (finalAttrs: {
         sugar700
       ];
       platforms = lib.platforms.unix;
-      broken = (withGtk && stdenv.isDarwin);
+      broken = (withGtk && stdenv.hostPlatform.isDarwin);
     };
 })
diff --git a/pkgs/by-name/sn/sniffglue/package.nix b/pkgs/by-name/sn/sniffglue/package.nix
index 9cedce67f64e..5bafa510776f 100644
--- a/pkgs/by-name/sn/sniffglue/package.nix
+++ b/pkgs/by-name/sn/sniffglue/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     libpcap
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libseccomp
   ];
 
diff --git a/pkgs/by-name/sn/snyk/package.nix b/pkgs/by-name/sn/snyk/package.nix
index b974fd0ee5f7..4c90ad105a6f 100644
--- a/pkgs/by-name/sn/snyk/package.nix
+++ b/pkgs/by-name/sn/snyk/package.nix
@@ -31,7 +31,7 @@ buildNpmPackage {
   env.NIX_CFLAGS_COMPILE =
     # Fix error: no member named 'aligned_alloc' in the global namespace
     lib.optionalString (
-      stdenv.isDarwin && stdenv.isx86_64
+      stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
     ) "-D_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION=1";
 
   npmBuildScript = "build:prod";
diff --git a/pkgs/by-name/so/so/package.nix b/pkgs/by-name/so/so/package.nix
index 9c837f4ae269..12c978a9b3aa 100644
--- a/pkgs/by-name/so/so/package.nix
+++ b/pkgs/by-name/so/so/package.nix
@@ -31,7 +31,7 @@ let
 
     buildInputs =
       [ openssl ]
-      ++ lib.optionals stdenv.isDarwin [
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [
         libiconv
         CoreServices
         Security
diff --git a/pkgs/by-name/so/solana-cli/package.nix b/pkgs/by-name/so/solana-cli/package.nix
index e82849b9685f..614be9acbc5f 100644
--- a/pkgs/by-name/so/solana-cli/package.nix
+++ b/pkgs/by-name/so/solana-cli/package.nix
@@ -70,8 +70,8 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles protobuf pkg-config ];
   buildInputs = [ openssl rustPlatform.bindgenHook ]
-    ++ lib.optionals stdenv.isLinux [ udev ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ udev ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libcxx
     IOKit
     Security
@@ -96,8 +96,8 @@ rustPlatform.buildRustPackage rec {
 
   # Require this on darwin otherwise the compiler starts rambling about missing
   # cmath functions
-  CPPFLAGS = lib.optionals stdenv.isDarwin "-isystem ${lib.getDev libcxx}/include/c++/v1";
-  LDFLAGS = lib.optionals stdenv.isDarwin "-L${lib.getLib libcxx}/lib";
+  CPPFLAGS = lib.optionals stdenv.hostPlatform.isDarwin "-isystem ${lib.getDev libcxx}/include/c++/v1";
+  LDFLAGS = lib.optionals stdenv.hostPlatform.isDarwin "-L${lib.getLib libcxx}/lib";
 
   # If set, always finds OpenSSL in the system, even if the vendored feature is enabled.
   OPENSSL_NO_VENDOR = 1;
diff --git a/pkgs/by-name/so/sonic-server/package.nix b/pkgs/by-name/so/sonic-server/package.nix
index 62857f464dfc..bc10180a540c 100644
--- a/pkgs/by-name/so/sonic-server/package.nix
+++ b/pkgs/by-name/so/sonic-server/package.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
     rustPlatform.bindgenHook
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-faligned-allocation";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-faligned-allocation";
 
   postPatch = ''
     substituteInPlace src/main.rs \
diff --git a/pkgs/by-name/so/sound-of-sorting/package.nix b/pkgs/by-name/so/sound-of-sorting/package.nix
index c6cb6e6a1cf9..b7b14312e358 100644
--- a/pkgs/by-name/so/sound-of-sorting/package.nix
+++ b/pkgs/by-name/so/sound-of-sorting/package.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
     wxGTK32
     SDL2
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
diff --git a/pkgs/by-name/so/soupault/package.nix b/pkgs/by-name/so/soupault/package.nix
index 615fd3dc7b9e..9912146eb165 100644
--- a/pkgs/by-name/so/soupault/package.nix
+++ b/pkgs/by-name/so/soupault/package.nix
@@ -21,7 +21,7 @@ ocamlPackages.buildDunePackage rec {
     hash = "sha256-UABbrNNcNaN9NgtAjCs4HUoNXMaK4QvCuWERuEnMG6I=";
   };
 
-  nativeBuildInputs = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ darwin.sigtool ];
+  nativeBuildInputs = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ darwin.sigtool ];
 
   buildInputs = with ocamlPackages; [
     base64
diff --git a/pkgs/by-name/so/sourcery/package.nix b/pkgs/by-name/so/sourcery/package.nix
index 79f469347a89..62cf70fde673 100644
--- a/pkgs/by-name/so/sourcery/package.nix
+++ b/pkgs/by-name/so/sourcery/package.nix
@@ -30,7 +30,7 @@ python3Packages.buildPythonApplication rec {
     inherit (platformInfo) platform hash;
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [ zlib ];
 
diff --git a/pkgs/by-name/sp/spacedrive/package.nix b/pkgs/by-name/sp/spacedrive/package.nix
index cf3ca6f0639a..89fa1d158208 100644
--- a/pkgs/by-name/sp/spacedrive/package.nix
+++ b/pkgs/by-name/sp/spacedrive/package.nix
@@ -59,7 +59,7 @@ let
 
   passthru.updateScript = nix-update-script { };
 in
-if stdenv.isDarwin then
+if stdenv.hostPlatform.isDarwin then
   stdenv.mkDerivation {
     inherit
       pname
diff --git a/pkgs/by-name/sp/spade/package.nix b/pkgs/by-name/sp/spade/package.nix
index e154d7ccfd4e..6612f355a1fd 100644
--- a/pkgs/by-name/sp/spade/package.nix
+++ b/pkgs/by-name/sp/spade/package.nix
@@ -41,8 +41,8 @@ rustPlatform.buildRustPackage rec {
     '')
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ python312 ];
-  env.NIX_CFLAGS_LINK = lib.optionals stdenv.isDarwin "-L${python312}/lib/python3.12/config-3.12-darwin -lpython3.12";
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ python312 ];
+  env.NIX_CFLAGS_LINK = lib.optionals stdenv.hostPlatform.isDarwin "-L${python312}/lib/python3.12/config-3.12-darwin -lpython3.12";
 
   meta = with lib; {
     description = "Better hardware description language";
diff --git a/pkgs/by-name/sp/spades/package.nix b/pkgs/by-name/sp/spades/package.nix
index daa748087b3c..2270ba33909d 100644
--- a/pkgs/by-name/sp/spades/package.nix
+++ b/pkgs/by-name/sp/spades/package.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation (finalAttrs: {
     readline
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-faligned-allocation";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-faligned-allocation";
 
   doCheck = true;
 
diff --git a/pkgs/by-name/sp/spfft/package.nix b/pkgs/by-name/sp/spfft/package.nix
index 65e98b92b4f2..9423978ed24e 100644
--- a/pkgs/by-name/sp/spfft/package.nix
+++ b/pkgs/by-name/sp/spfft/package.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     rocmPackages.clr
     rocmPackages.rocfft
     rocmPackages.hipfft
-  ] ++ lib.optional stdenv.isDarwin llvmPackages.openmp
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp
   ;
 
   cmakeFlags = [
diff --git a/pkgs/by-name/sp/spla/package.nix b/pkgs/by-name/sp/spla/package.nix
index eccf87258ace..2e07da1cdb02 100644
--- a/pkgs/by-name/sp/spla/package.nix
+++ b/pkgs/by-name/sp/spla/package.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   ++ lib.optionals (gpuBackend == "rocm") [
     rocmPackages.clr
     rocmPackages.rocblas
-  ] ++ lib.optional stdenv.isDarwin llvmPackages.openmp
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp
   ;
 
   cmakeFlags = [
diff --git a/pkgs/by-name/sp/spotifyd/package.nix b/pkgs/by-name/sp/spotifyd/package.nix
index 2a9bd5394eb0..45cce2754754 100644
--- a/pkgs/by-name/sp/spotifyd/package.nix
+++ b/pkgs/by-name/sp/spotifyd/package.nix
@@ -6,15 +6,15 @@
   rustPackages,
   pkg-config,
   openssl,
-  withALSA ? stdenv.isLinux,
+  withALSA ? stdenv.hostPlatform.isLinux,
   alsa-lib,
-  withJack ? stdenv.isLinux,
+  withJack ? stdenv.hostPlatform.isLinux,
   libjack2,
-  withPulseAudio ? config.pulseaudio or stdenv.isLinux,
+  withPulseAudio ? config.pulseaudio or stdenv.hostPlatform.isLinux,
   libpulseaudio,
-  withPortAudio ? stdenv.isDarwin,
+  withPortAudio ? stdenv.hostPlatform.isDarwin,
   portaudio,
-  withMpris ? stdenv.isLinux,
+  withMpris ? stdenv.hostPlatform.isLinux,
   withKeyring ? true,
   dbus,
   nix-update-script,
@@ -38,14 +38,14 @@ rustPackages.rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [ openssl ]
+    lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
     ++ lib.optional (withALSA || withJack) alsa-lib
     ++ lib.optional withJack libjack2
     ++ lib.optional withPulseAudio libpulseaudio
     ++ lib.optional withPortAudio portaudio
     # The `dbus_keying` feature works on other platforms, but only requires
     # `dbus` on Linux
-    ++ lib.optional ((withMpris || withKeyring) && stdenv.isLinux) dbus;
+    ++ lib.optional ((withMpris || withKeyring) && stdenv.hostPlatform.isLinux) dbus;
 
   buildNoDefaultFeatures = true;
   buildFeatures =
diff --git a/pkgs/by-name/sp/spotube/package.nix b/pkgs/by-name/sp/spotube/package.nix
index 38be57a23ebe..89b6a84b5174 100644
--- a/pkgs/by-name/sp/spotube/package.nix
+++ b/pkgs/by-name/sp/spotube/package.nix
@@ -122,4 +122,4 @@ let
     '';
   };
 in
-if stdenv.isDarwin then darwin else linux
+if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/by-name/sp/spral/package.nix b/pkgs/by-name/sp/spral/package.nix
index 720f0137338b..19fc5c5a5ff0 100644
--- a/pkgs/by-name/sp/spral/package.nix
+++ b/pkgs/by-name/sp/spral/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
         "subdir('ssids')" \
         ""
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Skipped test: lsmrt, segfault
       substituteInPlace tests/meson.build --replace-fail \
         "['lsmrt', files('lsmr.f90')]," \
@@ -47,11 +47,11 @@ stdenv.mkDerivation rec {
     blas
     lapack
     metis
-  ] ++ lib.optionals stdenv.isDarwin [ llvmPackages.openmp ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages.openmp ];
 
   mesonFlags = [ (lib.mesonBool "tests" true) ];
 
-  LDFLAGS = lib.optionals stdenv.isDarwin [ "-lomp" ];
+  LDFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [ "-lomp" ];
 
   doCheck = true;
 
diff --git a/pkgs/by-name/sq/sqlite-vss/package.nix b/pkgs/by-name/sq/sqlite-vss/package.nix
index 5f25699c9920..bc3612ceebe0 100644
--- a/pkgs/by-name/sq/sqlite-vss/package.nix
+++ b/pkgs/by-name/sq/sqlite-vss/package.nix
@@ -25,8 +25,8 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ nlohmann_json faiss sqlite ]
-    ++ lib.optional stdenv.isLinux gomp
-    ++ lib.optional stdenv.isDarwin llvmPackages.openmp;
+    ++ lib.optional stdenv.hostPlatform.isLinux gomp
+    ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   SQLITE_VSS_CMAKE_VERSION = finalAttrs.version;
 
diff --git a/pkgs/by-name/sq/squeezelite/package.nix b/pkgs/by-name/sq/squeezelite/package.nix
index 41d5f8c9d343..5a07d3da948d 100644
--- a/pkgs/by-name/sq/squeezelite/package.nix
+++ b/pkgs/by-name/sq/squeezelite/package.nix
@@ -9,8 +9,8 @@
   libpulseaudio,
   libvorbis,
   mpg123,
-  audioBackend ? if stdenv.isLinux then "alsa" else "portaudio",
-  alsaSupport ? stdenv.isLinux,
+  audioBackend ? if stdenv.hostPlatform.isLinux then "alsa" else "portaudio",
+  alsaSupport ? stdenv.hostPlatform.isLinux,
   alsa-lib,
   dsdSupport ? true,
   faad2Support ? true,
@@ -23,7 +23,7 @@
   soxr,
   sslSupport ? true,
   openssl,
-  portaudioSupport ? stdenv.isDarwin,
+  portaudioSupport ? stdenv.hostPlatform.isDarwin,
   portaudio,
   slimserver,
 }:
@@ -59,7 +59,7 @@ stdenv.mkDerivation {
     ++ optional pulseSupport libpulseaudio
     ++ optional alsaSupport alsa-lib
     ++ optional portaudioSupport portaudio
-    ++ optionals stdenv.isDarwin (
+    ++ optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk_11_0.frameworks;
       [
         CoreVideo
@@ -75,7 +75,7 @@ stdenv.mkDerivation {
     ++ optional opusSupport opusfile
     ++ optional resampleSupport soxr
     ++ optional sslSupport openssl
-    ++ optional (stdenv.isAarch32 or stdenv.isAarch64) libgpiod;
+    ++ optional (stdenv.hostPlatform.isAarch32 or stdenv.hostPlatform.isAarch64) libgpiod;
 
   enableParallelBuilding = true;
 
@@ -99,9 +99,9 @@ stdenv.mkDerivation {
     ++ optional pulseSupport "-DPULSEAUDIO"
     ++ optional resampleSupport "-DRESAMPLE"
     ++ optional sslSupport "-DUSE_SSL"
-    ++ optional (stdenv.isAarch32 or stdenv.isAarch64) "-DRPI";
+    ++ optional (stdenv.hostPlatform.isAarch32 or stdenv.hostPlatform.isAarch64) "-DRPI";
 
-  env = lib.optionalAttrs stdenv.isDarwin { LDADD = "-lportaudio -lpthread"; };
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { LDADD = "-lportaudio -lpthread"; };
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/by-name/ss/ssh-askpass-fullscreen/package.nix b/pkgs/by-name/ss/ssh-askpass-fullscreen/package.nix
index e677562fe3ed..0b192024f239 100644
--- a/pkgs/by-name/ss/ssh-askpass-fullscreen/package.nix
+++ b/pkgs/by-name/ss/ssh-askpass-fullscreen/package.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   meta = {
     homepage = "https://github.com/atj/ssh-askpass-fullscreen";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Small, fullscreen SSH askpass GUI using GTK+2";
     license = with lib.licenses; [ gpl2Plus ];
     mainProgram = "ssh-askpass-fullscreen";
diff --git a/pkgs/by-name/ss/ssh-openpgp-auth/generic.nix b/pkgs/by-name/ss/ssh-openpgp-auth/generic.nix
index 47edd91a4f3c..4cfe2b6ec7c4 100644
--- a/pkgs/by-name/ss/ssh-openpgp-auth/generic.nix
+++ b/pkgs/by-name/ss/ssh-openpgp-auth/generic.nix
@@ -59,7 +59,7 @@ rustPlatform.buildRustPackage {
     nettle
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.CoreFoundation
     darwin.apple_sdk_11_0.frameworks.IOKit
     darwin.apple_sdk_11_0.frameworks.Security
diff --git a/pkgs/by-name/ss/sshesame/package.nix b/pkgs/by-name/ss/sshesame/package.nix
index ac9f9b2a55f8..8f600712becc 100644
--- a/pkgs/by-name/ss/sshesame/package.nix
+++ b/pkgs/by-name/ss/sshesame/package.nix
@@ -20,7 +20,7 @@ buildGoModule rec {
 
   ldflags = [ "-s" "-w" ];
 
-  hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
+  hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
 
   passthru.updateScript = nix-update-script { };
 
diff --git a/pkgs/by-name/st/stalwart-mail/package.nix b/pkgs/by-name/st/stalwart-mail/package.nix
index 7175714c8778..06392d8afc18 100644
--- a/pkgs/by-name/st/stalwart-mail/package.nix
+++ b/pkgs/by-name/st/stalwart-mail/package.nix
@@ -63,17 +63,17 @@ rustPlatform.buildRustPackage {
     openssl
     sqlite
     zstd
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     foundationdb
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
   # skip defaults on darwin because foundationdb is not available
-  buildNoDefaultFeatures = stdenv.isDarwin;
-  buildFeatures = lib.optional (stdenv.isDarwin) [ "sqlite" "postgres" "mysql" "rocks" "elastic" "s3" "redis" ];
+  buildNoDefaultFeatures = stdenv.hostPlatform.isDarwin;
+  buildFeatures = lib.optional (stdenv.hostPlatform.isDarwin) [ "sqlite" "postgres" "mysql" "rocks" "elastic" "s3" "redis" ];
 
   env = {
     OPENSSL_NO_VENDOR = true;
@@ -146,7 +146,7 @@ rustPlatform.buildRustPackage {
     "--skip=smtp::inbound::vrfy::vrfy_expn"
   ];
 
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   passthru = {
     webadmin = callPackage ./webadmin.nix { };
diff --git a/pkgs/by-name/st/static-server/package.nix b/pkgs/by-name/st/static-server/package.nix
index 4ec8b8c20852..3be8eec4b80d 100644
--- a/pkgs/by-name/st/static-server/package.nix
+++ b/pkgs/by-name/st/static-server/package.nix
@@ -36,7 +36,7 @@ buildGoModule rec {
   ldflags = [ "-s" "-w" ];
 
   # tests sometimes fail with SIGQUIT on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru.tests = {
     version = testers.testVersion {
diff --git a/pkgs/by-name/st/stormlib/package.nix b/pkgs/by-name/st/stormlib/package.nix
index 90a748ca801f..090ada0d89f7 100644
--- a/pkgs/by-name/st/stormlib/package.nix
+++ b/pkgs/by-name/st/stormlib/package.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     libtomcrypt
     zlib
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Carbon
   ];
 
@@ -56,6 +56,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ aanderse karolchmist ];
     platforms = lib.platforms.all;
-    broken = stdenv.isDarwin; # installation directory mismatch
+    broken = stdenv.hostPlatform.isDarwin; # installation directory mismatch
   };
 })
diff --git a/pkgs/by-name/st/streamdeck-ui/package.nix b/pkgs/by-name/st/streamdeck-ui/package.nix
index 9f68a707bfca..c739ffa83e0b 100644
--- a/pkgs/by-name/st/streamdeck-ui/package.nix
+++ b/pkgs/by-name/st/streamdeck-ui/package.nix
@@ -52,7 +52,7 @@ python3Packages.buildPythonApplication rec {
       importlib-metadata
       evdev
     ]
-    ++ lib.optionals stdenv.isLinux [ qt6.qtwayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ qt6.qtwayland ];
 
   nativeCheckInputs =
     [ xvfb-run ]
diff --git a/pkgs/by-name/st/stu/package.nix b/pkgs/by-name/st/stu/package.nix
index ab74d428cc50..95179b7bcf9e 100644
--- a/pkgs/by-name/st/stu/package.nix
+++ b/pkgs/by-name/st/stu/package.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-/a91ONvKG6aRFAnHDkpOQQFtfGlO1WahWM9LdPs75iw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.CoreGraphics
   ];
diff --git a/pkgs/by-name/su/superscs/package.nix b/pkgs/by-name/su/superscs/package.nix
index f558bec8a208..ae5fb5537be4 100644
--- a/pkgs/by-name/su/superscs/package.nix
+++ b/pkgs/by-name/su/superscs/package.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-Qu7RM6Ew4hEmoIXO0utDDVmjmNX3yt3FxWZXCQ/Xjp4=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace-fail \
       ".so" \
       ".dylib"
diff --git a/pkgs/by-name/su/supersonic/package.nix b/pkgs/by-name/su/supersonic/package.nix
index a3674efe5d00..7964d31d9650 100644
--- a/pkgs/by-name/su/supersonic/package.nix
+++ b/pkgs/by-name/su/supersonic/package.nix
@@ -16,7 +16,7 @@
 , waylandSupport ? false
 }:
 
-assert waylandSupport -> stdenv.isLinux;
+assert waylandSupport -> stdenv.hostPlatform.isLinux;
 
 buildGoModule rec {
   pname = "supersonic" + lib.optionalString waylandSupport "-wayland";
@@ -34,7 +34,7 @@ buildGoModule rec {
   nativeBuildInputs = [
     copyDesktopItems
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
@@ -44,20 +44,20 @@ buildGoModule rec {
   buildInputs = [
     libglvnd
     mpv-unwrapped
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libXxf86vm
     xorg.libX11
-  ] ++ lib.optionals (stdenv.isLinux && !waylandSupport) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && !waylandSupport) [
     xorg.libXrandr
     xorg.libXinerama
     xorg.libXcursor
     xorg.libXi
     xorg.libXext
-  ] ++ lib.optionals (stdenv.isLinux && waylandSupport) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && waylandSupport) [
     wayland
     wayland-protocols
     libxkbcommon
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Cocoa
     darwin.apple_sdk_11_0.frameworks.Kernel
     darwin.apple_sdk_11_0.frameworks.OpenGL
diff --git a/pkgs/by-name/su/surrealdb/package.nix b/pkgs/by-name/su/surrealdb/package.nix
index 9a0c443faa83..b12910e0a6d5 100644
--- a/pkgs/by-name/su/surrealdb/package.nix
+++ b/pkgs/by-name/su/surrealdb/package.nix
@@ -46,7 +46,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   doCheck = false;
 
diff --git a/pkgs/by-name/sv/svix-server/package.nix b/pkgs/by-name/sv/svix-server/package.nix
index 16eaf01be24d..655214744904 100644
--- a/pkgs/by-name/sv/svix-server/package.nix
+++ b/pkgs/by-name/sv/svix-server/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     protobuf
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
@@ -50,6 +50,6 @@ rustPlatform.buildRustPackage rec {
       "https://github.com/svix/svix-webhooks/releases/tag/v${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ techknowlogick ];
-    broken = stdenv.isx86_64 && stdenv.isDarwin; # aws-lc-sys currently broken on darwin x86_64
+    broken = stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin; # aws-lc-sys currently broken on darwin x86_64
   };
 }
diff --git a/pkgs/by-name/sw/switcheroo/package.nix b/pkgs/by-name/sw/switcheroo/package.nix
index 459f4a93793f..d61c2a722f69 100644
--- a/pkgs/by-name/sw/switcheroo/package.nix
+++ b/pkgs/by-name/sw/switcheroo/package.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
     glib
     gtk4
     libadwaita
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/by-name/sy/symbolicator/package.nix b/pkgs/by-name/sy/symbolicator/package.nix
index 35487a35401a..473f9d64d652 100644
--- a/pkgs/by-name/sy/symbolicator/package.nix
+++ b/pkgs/by-name/sy/symbolicator/package.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
     bzip2
     openssl
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/by-name/sy/syncyomi/package.nix b/pkgs/by-name/sy/syncyomi/package.nix
index ee2e6af318fc..81f2982a05be 100644
--- a/pkgs/by-name/sy/syncyomi/package.nix
+++ b/pkgs/by-name/sy/syncyomi/package.nix
@@ -70,7 +70,7 @@ buildGoModule rec {
     "-X main.version=v${version}"
   ];
 
-  postInstall = lib.optionalString (!stdenvNoCC.isDarwin) ''
+  postInstall = lib.optionalString (!stdenvNoCC.hostPlatform.isDarwin) ''
     mv $out/bin/SyncYomi $out/bin/syncyomi
   '';
 
diff --git a/pkgs/by-name/sy/syntax/package.nix b/pkgs/by-name/sy/syntax/package.nix
index eceffd5aa0b4..01b5ade160fb 100644
--- a/pkgs/by-name/sy/syntax/package.nix
+++ b/pkgs/by-name/sy/syntax/package.nix
@@ -25,6 +25,6 @@ buildNpmPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [ h7x4 ];
     mainProgram = "syntax-cli";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/sy/systemctl-tui/package.nix b/pkgs/by-name/sy/systemctl-tui/package.nix
index c2a1dbec6ff2..c220fcc8547a 100644
--- a/pkgs/by-name/sy/systemctl-tui/package.nix
+++ b/pkgs/by-name/sy/systemctl-tui/package.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-6cFK1wMO5VICfi3tN140XH9inQOkkSfHVogKhTHtQb8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AppKit ];
 
   passthru = {
     updateScript = nix-update-script;
diff --git a/pkgs/by-name/t-/t-rex/package.nix b/pkgs/by-name/t-/t-rex/package.nix
index f26592e052d0..7c92e49182dd 100644
--- a/pkgs/by-name/t-/t-rex/package.nix
+++ b/pkgs/by-name/t-/t-rex/package.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
 
   buildInputs = [ gdal openssl ]
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
   meta = with lib; {
     description = "Vector tile server specialized on publishing MVT tiles";
diff --git a/pkgs/by-name/ta/tabby/package.nix b/pkgs/by-name/ta/tabby/package.nix
index 4ebc77e741b1..df01b5c4940a 100644
--- a/pkgs/by-name/ta/tabby/package.nix
+++ b/pkgs/by-name/ta/tabby/package.nix
@@ -19,7 +19,7 @@
 , rocmSupport ? config.rocmSupport
 
 , darwin
-, metalSupport ? stdenv.isDarwin && stdenv.isAarch64
+, metalSupport ? stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64
 
   # one of [ null "cpu" "rocm" "cuda" "metal" ];
 , acceleration ? null
@@ -55,16 +55,16 @@ let
   # If user did not not override the acceleration attribute, then try to use one of
   # - nixpkgs.config.cudaSupport
   # - nixpkgs.config.rocmSupport
-  # - metal if (stdenv.isDarwin && stdenv.isAarch64)
+  # - metal if (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
   # !! warn if multiple acceleration methods are enabled and default to the first one in the list
   featureDevice = if (builtins.isNull acceleration) then (warnIfMultipleAccelerationMethods availableAccelerations) else acceleration;
 
-  warnIfNotLinux = api: (lib.warnIfNot stdenv.isLinux
+  warnIfNotLinux = api: (lib.warnIfNot stdenv.hostPlatform.isLinux
     "building tabby with `${api}` is only supported on linux; falling back to cpu"
-    stdenv.isLinux);
-  warnIfNotDarwinAarch64 = api: (lib.warnIfNot (stdenv.isDarwin && stdenv.isAarch64)
+    stdenv.hostPlatform.isLinux);
+  warnIfNotDarwinAarch64 = api: (lib.warnIfNot (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
     "building tabby with `${api}` is only supported on Darwin-aarch64; falling back to cpu"
-    (stdenv.isDarwin && stdenv.isAarch64));
+    (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64));
 
   validAccel = lib.assertOneOf "tabby.featureDevice" featureDevice [ "cpu" "rocm" "cuda" "metal" ];
 
@@ -88,7 +88,7 @@ let
 
   # TODO(ghthor): some of this can be removed
   darwinBuildInputs = [ llamaccpPackage ]
-  ++ optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ++ optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Foundation
     Accelerate
     CoreVideo
@@ -143,7 +143,7 @@ rustPlatform.buildRustPackage {
   ];
 
   buildInputs = [ openssl ]
-  ++ optionals stdenv.isDarwin darwinBuildInputs
+  ++ optionals stdenv.hostPlatform.isDarwin darwinBuildInputs
   ++ optionals enableCuda cudaBuildInputs
   ++ optionals enableRocm rocmBuildInputs
   ;
@@ -164,6 +164,6 @@ rustPlatform.buildRustPackage {
     mainProgram = "tabby";
     license = licenses.asl20;
     maintainers = [ maintainers.ghthor ];
-    broken = stdenv.isDarwin && !stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/ta/tailscale-nginx-auth/package.nix b/pkgs/by-name/ta/tailscale-nginx-auth/package.nix
index 919a2e77a66b..9423cb2e46a6 100644
--- a/pkgs/by-name/ta/tailscale-nginx-auth/package.nix
+++ b/pkgs/by-name/ta/tailscale-nginx-auth/package.nix
@@ -15,7 +15,7 @@ buildGo123Module {
     "-X tailscale.com/version.shortStamp=${tailscale.version}"
   ];
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mv $out/bin/nginx-auth $out/bin/tailscale.nginx-auth
     sed -i -e "s#/usr/sbin#$out/bin#" ./cmd/nginx-auth/tailscale.nginx-auth.service
     install -D -m0444 -t $out/lib/systemd/system ./cmd/nginx-auth/tailscale.nginx-auth.service
diff --git a/pkgs/by-name/ta/tailwindcss-language-server/package.nix b/pkgs/by-name/ta/tailwindcss-language-server/package.nix
index 06865660f79c..f536741b60d8 100644
--- a/pkgs/by-name/ta/tailwindcss-language-server/package.nix
+++ b/pkgs/by-name/ta/tailwindcss-language-server/package.nix
@@ -26,7 +26,7 @@ buildNpmPackage {
   npmDepsHash = "sha256-T7YNHunncSv+z86Td1QuBt4dMGF1ipo85ZhW7U9I0Zw=";
   npmWorkspace = "packages/tailwindcss-language-server";
 
-  buildInputs = [ libsecret ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security AppKit ]);
+  buildInputs = [ libsecret ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security AppKit ]);
 
   nativeBuildInputs = [ python3 pkg-config ];
 
diff --git a/pkgs/by-name/ta/talecast/package.nix b/pkgs/by-name/ta/talecast/package.nix
index df0f994d5144..e18d5fd5f22c 100644
--- a/pkgs/by-name/ta/talecast/package.nix
+++ b/pkgs/by-name/ta/talecast/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   passthru = {
     updateScript = nix-update-script { };
diff --git a/pkgs/by-name/ta/taler-depolymerization/package.nix b/pkgs/by-name/ta/taler-depolymerization/package.nix
index 49e14d438d77..d61478b32583 100644
--- a/pkgs/by-name/ta/taler-depolymerization/package.nix
+++ b/pkgs/by-name/ta/taler-depolymerization/package.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage {
     cp docs/*.conf $out/share/examples
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks;
     [
       CoreFoundation
diff --git a/pkgs/by-name/ta/tangerine/package.nix b/pkgs/by-name/ta/tangerine/package.nix
index 5615d441b80b..1ec2d6b362b9 100644
--- a/pkgs/by-name/ta/tangerine/package.nix
+++ b/pkgs/by-name/ta/tangerine/package.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
     homepage = "https://github.com/Aeva/tangerine";
     license = licenses.asl20;
     maintainers = [ maintainers.viraptor ];
-    broken = stdenv.isDarwin; # third_party/naive-surface-nets doesn't find std::execution
+    broken = stdenv.hostPlatform.isDarwin; # third_party/naive-surface-nets doesn't find std::execution
   };
 }
 
diff --git a/pkgs/by-name/ta/tartan/package.nix b/pkgs/by-name/ta/tartan/package.nix
index d73ffdf99bb5..56c18653dfb2 100644
--- a/pkgs/by-name/ta/tartan/package.nix
+++ b/pkgs/by-name/ta/tartan/package.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Tools and Clang plugins for developing code with GLib";
     homepage = "https://gitlab.freedesktop.org/tartan/tartan";
     changelog = "https://gitlab.freedesktop.org/tartan/tartan/-/blob/main/NEWS";
diff --git a/pkgs/by-name/ta/taskwarrior3/package.nix b/pkgs/by-name/ta/taskwarrior3/package.nix
index 26b8d8ecd32c..4be5fdd072c4 100644
--- a/pkgs/by-name/ta/taskwarrior3/package.nix
+++ b/pkgs/by-name/ta/taskwarrior3/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
       rustc
       rustPlatform.cargoSetupHook
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # darwin dependencies
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/by-name/te/teams-for-linux/package.nix b/pkgs/by-name/te/teams-for-linux/package.nix
index 4c532f453800..c1ecf1a4bb1e 100644
--- a/pkgs/by-name/te/teams-for-linux/package.nix
+++ b/pkgs/by-name/te/teams-for-linux/package.nix
@@ -29,9 +29,9 @@ buildNpmPackage rec {
   nativeBuildInputs = [
     makeWrapper
     versionCheckHook
-  ] ++ lib.optionals (stdenv.isLinux) [ copyDesktopItems ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [ copyDesktopItems ];
 
-  doInstallCheck = stdenv.isLinux;
+  doInstallCheck = stdenv.hostPlatform.isLinux;
 
   env = {
     # disable code signing on Darwin
@@ -60,7 +60,7 @@ buildNpmPackage rec {
       runHook preInstall
 
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/share/{applications,teams-for-linux}
       cp dist/*-unpacked/resources/app.asar $out/share/teams-for-linux/
 
@@ -82,7 +82,7 @@ buildNpmPackage rec {
         --add-flags "$out/share/teams-for-linux/app.asar" \
         --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}"
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/Applications
       cp -r dist/mac*/teams-for-linux.app $out/Applications
       makeWrapper $out/Applications/teams-for-linux.app/Contents/MacOS/teams-for-linux $out/bin/teams-for-linux
diff --git a/pkgs/by-name/te/telegraf/package.nix b/pkgs/by-name/te/telegraf/package.nix
index bda948d342aa..cb98c85bf45b 100644
--- a/pkgs/by-name/te/telegraf/package.nix
+++ b/pkgs/by-name/te/telegraf/package.nix
@@ -34,7 +34,7 @@ buildGo123Module rec {
     version = testers.testVersion {
       package = telegraf;
     };
-  } // lib.optionalAttrs stdenv.isLinux {
+  } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
     inherit (nixosTests) telegraf;
   };
 
diff --git a/pkgs/by-name/te/telescope/package.nix b/pkgs/by-name/te/telescope/package.nix
index 1a4db30c9058..801cae0b123c 100644
--- a/pkgs/by-name/te/telescope/package.nix
+++ b/pkgs/by-name/te/telescope/package.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     libgrapheme
     libressl
     ncurses
-  ] ++ lib.optional stdenv.isDarwin memstreamHook;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin memstreamHook;
 
   configureFlags = [
     "HOSTCC=${buildPackages.stdenv.cc}/bin/${buildPackages.stdenv.cc.targetPrefix}cc"
diff --git a/pkgs/by-name/th/the-legend-of-edgar/package.nix b/pkgs/by-name/th/the-legend-of-edgar/package.nix
index 509c6e65524b..5ab2fd0858a6 100644
--- a/pkgs/by-name/th/the-legend-of-edgar/package.nix
+++ b/pkgs/by-name/th/the-legend-of-edgar/package.nix
@@ -68,6 +68,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "edgar";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/th/the-powder-toy/package.nix b/pkgs/by-name/th/the-powder-toy/package.nix
index 25da4e5d8818..771965b4068a 100644
--- a/pkgs/by-name/th/the-powder-toy/package.nix
+++ b/pkgs/by-name/th/the-powder-toy/package.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     meson
     ninja
     pkg-config
-  ] ++ lib.optional stdenv.isLinux copyDesktopItems;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux copyDesktopItems;
 
   buildInputs = [
     bzip2
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     luajit
     SDL2
     zlib
-  ] ++ lib.optional stdenv.isDarwin Cocoa;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   mesonFlags = [ "-Dworkaround_elusive_bzip2=false" ];
 
diff --git a/pkgs/by-name/th/thefuck/package.nix b/pkgs/by-name/th/thefuck/package.nix
index 7d908b9f8d99..e0cd1b7b5d0c 100644
--- a/pkgs/by-name/th/thefuck/package.nix
+++ b/pkgs/by-name/th/thefuck/package.nix
@@ -33,7 +33,7 @@ python311Packages.buildPythonApplication rec {
       pytest-mock
     ]);
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "test_settings_defaults"
     "test_from_file"
     "test_from_env"
diff --git a/pkgs/by-name/th/thonny/package.nix b/pkgs/by-name/th/thonny/package.nix
index 91c40a3c7b3c..445a7954dfdc 100644
--- a/pkgs/by-name/th/thonny/package.nix
+++ b/pkgs/by-name/th/thonny/package.nix
@@ -21,7 +21,7 @@ buildPythonApplication rec {
     hash = "sha256-/ms2RESnV3bsJpK1zYYLHNUu1FtA6PntaseTbKMfUMc=";
   };
 
-  nativeBuildInputs = [ copyDesktopItems ] ++ lib.optional stdenv.isDarwin desktopToDarwinBundle;
+  nativeBuildInputs = [ copyDesktopItems ] ++ lib.optional stdenv.hostPlatform.isDarwin desktopToDarwinBundle;
 
   desktopItems = [
     (makeDesktopItem {
@@ -51,7 +51,7 @@ buildPythonApplication rec {
         asttokens
         send2trash
       ]
-      ++ lib.optionals stdenv.isLinux [
+      ++ lib.optionals stdenv.hostPlatform.isLinux [
         dbus-next
       ]
     );
diff --git a/pkgs/by-name/ti/tidgi/package.nix b/pkgs/by-name/ti/tidgi/package.nix
index 20f0b4a194d1..0717dd8239f4 100644
--- a/pkgs/by-name/ti/tidgi/package.nix
+++ b/pkgs/by-name/ti/tidgi/package.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
   version = "0.9.6";
 
   src =
-    if stdenv.isAarch64
+    if stdenv.hostPlatform.isAarch64
     then
       fetchurl
       {
diff --git a/pkgs/by-name/ti/tinymist/package.nix b/pkgs/by-name/ti/tinymist/package.nix
index 9928080dd117..53d749a50acb 100644
--- a/pkgs/by-name/ti/tinymist/package.nix
+++ b/pkgs/by-name/ti/tinymist/package.nix
@@ -44,7 +44,7 @@ rustPlatform.buildRustPackage rec {
       openssl
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.CoreFoundation
       darwin.apple_sdk_11_0.frameworks.CoreServices
       darwin.apple_sdk_11_0.frameworks.Security
diff --git a/pkgs/by-name/tl/tlclient/package.nix b/pkgs/by-name/tl/tlclient/package.nix
index a789d391ccbe..04dc61b4e703 100644
--- a/pkgs/by-name/tl/tlclient/package.nix
+++ b/pkgs/by-name/tl/tlclient/package.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation (
       changelog = "https://www.cendio.com/thinlinc/docs/relnotes/${version}/";
       maintainers = with lib.maintainers; [ felixalbrigtsen ];
       platforms = with lib.platforms; linux ++ darwin ++ windows;
-      broken = !(stdenv.isLinux && stdenv.isx86_64);
+      broken = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64);
       mainProgram = "tlclient";
     };
   }
diff --git a/pkgs/by-name/tl/tlrc/package.nix b/pkgs/by-name/tl/tlrc/package.nix
index e0e46552352a..86e9fe7861b8 100644
--- a/pkgs/by-name/tl/tlrc/package.nix
+++ b/pkgs/by-name/tl/tlrc/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/by-name/to/tootik/package.nix b/pkgs/by-name/to/tootik/package.nix
index 6eb9d0d715b3..1dc3a8db3c07 100644
--- a/pkgs/by-name/to/tootik/package.nix
+++ b/pkgs/by-name/to/tootik/package.nix
@@ -23,7 +23,7 @@ buildGoModule rec {
 
   tags = [ "fts5" ];
 
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64);
 
   meta = {
     description = "Federated nanoblogging service with a Gemini frontend";
diff --git a/pkgs/by-name/to/tor-browser/package.nix b/pkgs/by-name/to/tor-browser/package.nix
index 154f70c83e00..c0b1dfb33d42 100644
--- a/pkgs/by-name/to/tor-browser/package.nix
+++ b/pkgs/by-name/to/tor-browser/package.nix
@@ -29,10 +29,10 @@
 , pciutils
 , zlib
 
-, libnotifySupport ? stdenv.isLinux
+, libnotifySupport ? stdenv.hostPlatform.isLinux
 , libnotify
 
-, waylandSupport ? stdenv.isLinux
+, waylandSupport ? stdenv.hostPlatform.isLinux
 , libxkbcommon
 , libdrm
 , libGL
diff --git a/pkgs/by-name/to/toxic/package.nix b/pkgs/by-name/to/toxic/package.nix
index 54462fdaade1..036c96dd47d5 100644
--- a/pkgs/by-name/to/toxic/package.nix
+++ b/pkgs/by-name/to/toxic/package.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     libtoxcore libsodium ncurses curl gdk-pixbuf libnotify
-  ] ++ lib.optionals (!stdenv.isAarch32) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isAarch32) [
     openal libopus libvpx freealut qrencode
   ];
   nativeBuildInputs = [ pkg-config libconfig ];
diff --git a/pkgs/by-name/tp/tpnote/package.nix b/pkgs/by-name/tp/tpnote/package.nix
index a19eed1281dc..ea58c45f579b 100644
--- a/pkgs/by-name/tp/tpnote/package.nix
+++ b/pkgs/by-name/tp/tpnote/package.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     oniguruma
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
      AppKit
      CoreServices
      SystemConfiguration
diff --git a/pkgs/by-name/tr/tracker-miners/package.nix b/pkgs/by-name/tr/tracker-miners/package.nix
index fb882da42b73..963df6517e35 100644
--- a/pkgs/by-name/tr/tracker-miners/package.nix
+++ b/pkgs/by-name/tr/tracker-miners/package.nix
@@ -105,12 +105,12 @@ stdenv.mkDerivation (finalAttrs: {
     libxml2
     poppler
     taglib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libseccomp
     networkmanager
     systemd
     upower
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     e2fsprogs
   ];
 
@@ -122,7 +122,7 @@ stdenv.mkDerivation (finalAttrs: {
     # security issue since then. Despite a patch now being availab, we're opting
     # to be safe due to the general state of the project
     "-Dminer_rss=false"
-  ] ++ lib.optionals (!stdenv.isLinux) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Dbattery_detection=none"
     "-Dnetwork_manager=disabled"
     "-Dsystemd_user_services=false"
diff --git a/pkgs/by-name/tr/tracy/package.nix b/pkgs/by-name/tr/tracy/package.nix
index 1c726affff47..5f03796e50ac 100644
--- a/pkgs/by-name/tr/tracy/package.nix
+++ b/pkgs/by-name/tr/tracy/package.nix
@@ -11,7 +11,7 @@
 , pkg-config
 , tbb
 
-, withWayland ? stdenv.isLinux
+, withWayland ? stdenv.hostPlatform.isLinux
 , libxkbcommon
 , wayland
 }:
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-DN1ExvQ5wcIUyhMAfiakFbZkDsx+5l8VMtYGvSdboPA=";
   };
 
-  patches = lib.optionals (stdenv.isDarwin && !(lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11")) [
+  patches = lib.optionals (stdenv.hostPlatform.isDarwin && !(lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11")) [
     ./0001-remove-unifiedtypeidentifiers-framework
   ];
 
@@ -37,25 +37,25 @@ stdenv.mkDerivation rec {
     capstone
     freetype
     glfw
-  ] ++ lib.optionals (stdenv.isLinux && withWayland) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && withWayland) [
     libxkbcommon
     wayland
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     dbus
     hicolor-icon-theme
     tbb
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Carbon
-  ] ++ lib.optionals (stdenv.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") [
     darwin.apple_sdk.frameworks.UniformTypeIdentifiers
   ];
 
   env.NIX_CFLAGS_COMPILE = toString ([ ]
     # Apple's compiler finds a format string security error on
     # ../../../server/TracyView.cpp:649:34, preventing building.
-    ++ lib.optional stdenv.isDarwin "-Wno-format-security"
-    ++ lib.optional stdenv.isLinux "-ltbb"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-Wno-format-security"
+    ++ lib.optional stdenv.hostPlatform.isLinux "-ltbb"
     ++ lib.optional stdenv.cc.isClang "-faligned-allocation");
 
   buildPhase = ''
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
     make -j $NIX_BUILD_CORES -C import-chrome/build/unix release
     make -j $NIX_BUILD_CORES -C library/unix release
     make -j $NIX_BUILD_CORES -C profiler/build/unix release \
-      ${lib.optionalString (stdenv.isLinux && !withWayland) "LEGACY=1"}
+      ${lib.optionalString (stdenv.hostPlatform.isLinux && !withWayland) "LEGACY=1"}
     make -j $NIX_BUILD_CORES -C update/build/unix release
 
     runHook postBuild
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
     cp -p public/client/*.{h,hpp} $out/include/Tracy/client
     cp -p public/common/*.{h,hpp} $out/include/Tracy/common
     cp -p public/tracy/*.{h,hpp} $out/include/Tracy/tracy
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace extra/desktop/tracy.desktop \
       --replace Exec=/usr/bin/tracy Exec=tracy
 
@@ -102,7 +102,7 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libcapstone.4.dylib ${capstone}/lib/libcapstone.4.dylib $out/bin/tracy
   '';
 
diff --git a/pkgs/by-name/tr/transmission_3/package.nix b/pkgs/by-name/tr/transmission_3/package.nix
index 9372ef6dcf5f..a97e2cbb3e7f 100644
--- a/pkgs/by-name/tr/transmission_3/package.nix
+++ b/pkgs/by-name/tr/transmission_3/package.nix
@@ -88,8 +88,8 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optionals enableQt [ qt5.qttools qt5.qtbase ]
   ++ lib.optionals enableGTK3 [ gtk3 xorg.libpthreadstubs ]
   ++ lib.optionals enableSystemd [ systemd ]
-  ++ lib.optionals stdenv.isLinux [ inotify-tools ]
-  ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ inotify-tools ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   postInstall = ''
     mkdir $apparmor
@@ -102,7 +102,7 @@ stdenv.mkDerivation (finalAttrs: {
       include "${apparmorRulesFromClosure { name = "transmission-daemon"; } ([
         curl libevent openssl pcre zlib libnatpmp miniupnpc
       ] ++ lib.optionals enableSystemd [ systemd ]
-        ++ lib.optionals stdenv.isLinux [ inotify-tools ]
+        ++ lib.optionals stdenv.hostPlatform.isLinux [ inotify-tools ]
       )}"
       r @{PROC}/sys/kernel/random/uuid,
       r @{PROC}/sys/vm/overcommit_memory,
diff --git a/pkgs/by-name/tr/trealla/package.nix b/pkgs/by-name/tr/trealla/package.nix
index 8a3650638312..288b89a04ae6 100644
--- a/pkgs/by-name/tr/trealla/package.nix
+++ b/pkgs/by-name/tr/trealla/package.nix
@@ -100,6 +100,6 @@ stdenv.mkDerivation (finalAttrs: {
     ];
     mainProgram = "tpl";
     platforms = lib.platforms.all;
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 })
diff --git a/pkgs/by-name/tr/trigger-control/package.nix b/pkgs/by-name/tr/trigger-control/package.nix
index 3398a3fe0aab..838aae472d64 100644
--- a/pkgs/by-name/tr/trigger-control/package.nix
+++ b/pkgs/by-name/tr/trigger-control/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     SDL2
     dbus
     libnotify
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libdecor
   ];
 
@@ -62,7 +62,7 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/trigger-control \
       --prefix PATH : ${lib.makeBinPath [ zenity ]}
   '';
diff --git a/pkgs/by-name/tr/triton-llvm/package.nix b/pkgs/by-name/tr/triton-llvm/package.nix
index 90a45c133c73..d45aa2fafe65 100644
--- a/pkgs/by-name/tr/triton-llvm/package.nix
+++ b/pkgs/by-name/tr/triton-llvm/package.nix
@@ -149,7 +149,7 @@ in stdenv.mkDerivation (finalAttrs: {
 
     substituteInPlace unittests/Support/CMakeLists.txt \
       --replace "Path.cpp" ""
-  '' + lib.optionalString stdenv.isAarch64 ''
+  '' + lib.optionalString stdenv.hostPlatform.isAarch64 ''
     # Not sure why this fails
     rm test/tools/llvm-exegesis/AArch64/latency-by-opcode-name.s
   '';
@@ -161,7 +161,7 @@ in stdenv.mkDerivation (finalAttrs: {
   doCheck = buildTests;
 
   nativeCheckInputs = [ which ]
-    ++ lib.optionals stdenv.isDarwin [ sysctl ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ sysctl ];
 
   checkTarget = "check-all";
   requiredSystemFeatures = [ "big-parallel" ];
diff --git a/pkgs/by-name/tr/trunk-ng/package.nix b/pkgs/by-name/tr/trunk-ng/package.nix
index 3a7f9bd5ba05..73af1faaba29 100644
--- a/pkgs/by-name/tr/trunk-ng/package.nix
+++ b/pkgs/by-name/tr/trunk-ng/package.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = if stdenv.isDarwin
+  buildInputs = if stdenv.hostPlatform.isDarwin
     then [ libiconv CoreServices Security SystemConfiguration ]
     else [ openssl ];
 
diff --git a/pkgs/by-name/ts/tsukimi/package.nix b/pkgs/by-name/ts/tsukimi/package.nix
index fc984dde21a0..7d8889079a7f 100644
--- a/pkgs/by-name/ts/tsukimi/package.nix
+++ b/pkgs/by-name/ts/tsukimi/package.nix
@@ -91,6 +91,6 @@ rustPlatform.buildRustPackage rec {
     platforms = lib.platforms.linux;
     # libmpv2 crate fail to compile
     # expected raw pointer `*const u8` found raw pointer `*const i8`
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/by-name/tu/tuifimanager/package.nix b/pkgs/by-name/tu/tuifimanager/package.nix
index 15706439a30a..26b30a477da0 100644
--- a/pkgs/by-name/tu/tuifimanager/package.nix
+++ b/pkgs/by-name/tu/tuifimanager/package.nix
@@ -6,9 +6,9 @@
 , gnome-themes-extra
 , qt6
 , makeWrapper
-, x11Support ? stdenv.isLinux
+, x11Support ? stdenv.hostPlatform.isLinux
 # pypinput is marked as broken for darwin
-, pynputSupport ? stdenv.isLinux
+, pynputSupport ? stdenv.hostPlatform.isLinux
 # Experimental Drag & Drop support requires x11 & pyinput suport
 , hasDndSupport ? x11Support && pynputSupport
 , enableDragAndDrop ? false
diff --git a/pkgs/by-name/tu/tup/package.nix b/pkgs/by-name/tu/tup/package.nix
index c6614db17832..db6a6058a00b 100644
--- a/pkgs/by-name/tu/tup/package.nix
+++ b/pkgs/by-name/tu/tup/package.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, fuse3, macfuse-stubs, pkg-config, sqlite, pcre2 }:
 
 let
-  fuse = if stdenv.isDarwin then macfuse-stubs else fuse3;
+  fuse = if stdenv.hostPlatform.isDarwin then macfuse-stubs else fuse3;
 in stdenv.mkDerivation rec {
   pname = "tup";
   version = "0.8";
@@ -71,6 +71,6 @@ in stdenv.mkDerivation rec {
     # ../../../../os-specific/darwin/apple-sdk/default.nix
     #
     # https://github.com/gittup/tup/commit/3697c74
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/tu/turbo-unwrapped/package.nix b/pkgs/by-name/tu/turbo-unwrapped/package.nix
index d3f0959577d1..f9228f310cc1 100644
--- a/pkgs/by-name/tu/turbo-unwrapped/package.nix
+++ b/pkgs/by-name/tu/turbo-unwrapped/package.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
       protobuf
     ]
     # https://github.com/vercel/turbo/blob/ea740706e0592b3906ab34c7cfa1768daafc2a84/CONTRIBUTING.md#linux-dependencies
-    ++ lib.optional stdenv.isLinux llvmPackages.bintools;
+    ++ lib.optional stdenv.hostPlatform.isLinux llvmPackages.bintools;
 
   buildInputs =
     [
@@ -51,7 +51,7 @@ rustPlatform.buildRustPackage rec {
       rust-jemalloc-sys
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk_11_0.frameworks;
       [
         CoreFoundation
diff --git a/pkgs/by-name/ty/typst-live/package.nix b/pkgs/by-name/ty/typst-live/package.nix
index 8968adbb5e1b..3912ed217b51 100644
--- a/pkgs/by-name/ty/typst-live/package.nix
+++ b/pkgs/by-name/ty/typst-live/package.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
     makeWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/by-name/ty/typst-lsp/package.nix b/pkgs/by-name/ty/typst-lsp/package.nix
index cc8e2d203e66..bb4d0b12f39b 100644
--- a/pkgs/by-name/ty/typst-lsp/package.nix
+++ b/pkgs/by-name/ty/typst-lsp/package.nix
@@ -39,14 +39,14 @@ rustPlatform.buildRustPackage rec {
     ln -s ${./Cargo.lock} Cargo.lock
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   checkFlags =
     [
       # requires internet access
       "--skip=workspace::package::external::remote_repo::test::full_download"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # both tests fail on darwin with 'Attempted to create a NULL object.'
       "--skip=workspace::fs::local::test::read"
       "--skip=workspace::package::external::manager::test::local_package"
diff --git a/pkgs/by-name/ty/typst/package.nix b/pkgs/by-name/ty/typst/package.nix
index aa71277fefab..de06edfee2f3 100644
--- a/pkgs/by-name/ty/typst/package.nix
+++ b/pkgs/by-name/ty/typst/package.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     xz
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/by-name/ty/typstyle/package.nix b/pkgs/by-name/ty/typstyle/package.nix
index 906a9738f7cd..ec84a2a2d526 100644
--- a/pkgs/by-name/ty/typstyle/package.nix
+++ b/pkgs/by-name/ty/typstyle/package.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libgit2
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/by-name/uc/ucg/package.nix b/pkgs/by-name/uc/ucg/package.nix
index 99d1b90c43df..7ac909b25686 100644
--- a/pkgs/by-name/uc/ucg/package.nix
+++ b/pkgs/by-name/uc/ucg/package.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "ucg";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isAarch64 || stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isDarwin;
   };
 })
 # TODO: report upstream
diff --git a/pkgs/by-name/uc/uclibc-ng/package.nix b/pkgs/by-name/uc/uclibc-ng/package.nix
index 011c6bfd8737..8869dce9d187 100644
--- a/pkgs/by-name/uc/uclibc-ng/package.nix
+++ b/pkgs/by-name/uc/uclibc-ng/package.nix
@@ -49,7 +49,7 @@ let
     KERNEL_HEADERS "${linuxHeaders}/include"
   '' + lib.optionalString (stdenv.hostPlatform.gcc.float or "" == "soft") ''
     UCLIBC_HAS_FPU n
-  '' + lib.optionalString (stdenv.isAarch32 && isCross) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isAarch32 && isCross) ''
     CONFIG_ARM_EABI y
     ARCH_WANTS_BIG_ENDIAN n
     ARCH_BIG_ENDIAN n
diff --git a/pkgs/by-name/ue/ueberzugpp/package.nix b/pkgs/by-name/ue/ueberzugpp/package.nix
index 78c1f817ad6a..0422c54a9d16 100644
--- a/pkgs/by-name/ue/ueberzugpp/package.nix
+++ b/pkgs/by-name/ue/ueberzugpp/package.nix
@@ -18,14 +18,14 @@
 , cli11
 , libexif
 , range-v3
-, enableOpencv ? stdenv.isLinux
+, enableOpencv ? stdenv.hostPlatform.isLinux
 , opencv
-, enableWayland ? stdenv.isLinux
+, enableWayland ? stdenv.hostPlatform.isLinux
 , extra-cmake-modules
 , wayland
 , wayland-protocols
 , wayland-scanner
-, enableX11 ? stdenv.isLinux
+, enableX11 ? stdenv.hostPlatform.isLinux
 , xorg
 }:
 
@@ -85,7 +85,7 @@ stdenv.mkDerivation rec {
   ];
 
   # error: aligned deallocation function of type 'void (void *, std::align_val_t) noexcept' is only available on macOS 10.14 or newer
-  preBuild = lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11.0") ''
+  preBuild = lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11.0") ''
     export MACOSX_DEPLOYMENT_TARGET=10.14
   '';
 
diff --git a/pkgs/by-name/ui/uiua/package.nix b/pkgs/by-name/ui/uiua/package.nix
index a3d6dd08bbab..5bcf16fdd8aa 100644
--- a/pkgs/by-name/ui/uiua/package.nix
+++ b/pkgs/by-name/ui/uiua/package.nix
@@ -30,16 +30,16 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-4XHKcmOeaeSGfl7uvQQdhm29DBWEdZLX021d9+Ebrww=";
 
   nativeBuildInputs =
-    lib.optionals stdenv.isDarwin [ rustPlatform.bindgenHook ]
+    lib.optionals stdenv.hostPlatform.isDarwin [ rustPlatform.bindgenHook ]
     ++ lib.optionals audioSupport [ pkg-config ];
 
   buildInputs =
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       AppKit
       CoreServices
     ]
-    ++ lib.optionals (audioSupport && stdenv.isDarwin) [ AudioUnit ]
-    ++ lib.optionals (audioSupport && stdenv.isLinux) [ alsa-lib ];
+    ++ lib.optionals (audioSupport && stdenv.hostPlatform.isDarwin) [ AudioUnit ]
+    ++ lib.optionals (audioSupport && stdenv.hostPlatform.isLinux) [ alsa-lib ];
 
   buildFeatures = lib.optional audioSupport "audio";
 
diff --git a/pkgs/by-name/un/unbound/package.nix b/pkgs/by-name/un/unbound/package.nix
index 0d827159358f..9c789a3b0564 100644
--- a/pkgs/by-name/un/unbound/package.nix
+++ b/pkgs/by-name/un/unbound/package.nix
@@ -36,7 +36,7 @@
 , withRedis ? false
 # Avoid .lib depending on lib.getLib openssl
 # The build gets a little hacky, so in some cases we disable this approach.
-, withSlimLib ? stdenv.isLinux && !stdenv.hostPlatform.isMusl && !withDNSTAP
+, withSlimLib ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isMusl && !withDNSTAP
 # enable support for python plugins in unbound: note this is distinct from pyunbound
 # see https://unbound.docs.nlnetlabs.nl/en/latest/developer/python-modules.html
 , withPythonModule ? false
diff --git a/pkgs/by-name/un/unciv/package.nix b/pkgs/by-name/un/unciv/package.nix
index ff72272c6c53..5188209732f5 100644
--- a/pkgs/by-name/un/unciv/package.nix
+++ b/pkgs/by-name/un/unciv/package.nix
@@ -26,7 +26,7 @@ let
     hash = "sha256-Zuz+HGfxjGviGBKTiHdIFXF8UMRLEIfM8f+LIB/xonk=";
   };
 
-  envLibPath = lib.makeLibraryPath (lib.optionals stdenv.isLinux [
+  envLibPath = lib.makeLibraryPath (lib.optionals stdenv.hostPlatform.isLinux [
     libGL
     libpulseaudio
     libXxf86vm
diff --git a/pkgs/by-name/un/unimap/package.nix b/pkgs/by-name/un/unimap/package.nix
index 7563c1f50535..eafe26962cec 100644
--- a/pkgs/by-name/un/unimap/package.nix
+++ b/pkgs/by-name/un/unimap/package.nix
@@ -30,16 +30,16 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [
     installShellFiles
     makeBinaryWrapper
-  ] ++ lib.optionals (stdenv.hostPlatform.isAarch && stdenv.isLinux) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isAarch && stdenv.hostPlatform.isLinux) [
     pkg-config
   ];
 
   # only depends on openssl on aarch/arm linux
-  buildInputs = lib.optionals (stdenv.hostPlatform.isAarch && stdenv.isLinux) [
+  buildInputs = lib.optionals (stdenv.hostPlatform.isAarch && stdenv.hostPlatform.isLinux) [
     openssl
   ];
 
-  env = lib.optionalAttrs (stdenv.hostPlatform.isAarch && stdenv.isLinux) {
+  env = lib.optionalAttrs (stdenv.hostPlatform.isAarch && stdenv.hostPlatform.isLinux) {
     OPENSSL_NO_VENDOR = true;
   };
 
diff --git a/pkgs/by-name/un/unison-fsmonitor/package.nix b/pkgs/by-name/un/unison-fsmonitor/package.nix
index b351071b6d30..84d367285c02 100644
--- a/pkgs/by-name/un/unison-fsmonitor/package.nix
+++ b/pkgs/by-name/un/unison-fsmonitor/package.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
   };
   cargoHash = "sha256-eKRayFU3xq2uo6YeFqcTPLInZYlympH6Z01vOCVsVqQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/by-name/un/unison/package.nix b/pkgs/by-name/un/unison/package.nix
index 400c73e105b4..d0298c7f1584 100644
--- a/pkgs/by-name/un/unison/package.nix
+++ b/pkgs/by-name/un/unison/package.nix
@@ -6,7 +6,7 @@
 , makeDesktopItem
 , wrapGAppsHook3
 , gsettings-desktop-schemas
-, enableX11 ? !stdenv.isDarwin
+, enableX11 ? !stdenv.hostPlatform.isDarwin
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -58,7 +58,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ nevivurn ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin && enableX11; # unison-gui and uimac are broken on darwin
+    broken = stdenv.hostPlatform.isDarwin && enableX11; # unison-gui and uimac are broken on darwin
     mainProgram = if enableX11 then "unison-gui" else "unison";
   };
 })
diff --git a/pkgs/by-name/un/universal-ctags/package.nix b/pkgs/by-name/un/universal-ctags/package.nix
index 09186886d507..eda2fc6a8176 100644
--- a/pkgs/by-name/un/universal-ctags/package.nix
+++ b/pkgs/by-name/un/universal-ctags/package.nix
@@ -43,8 +43,8 @@ stdenv.mkDerivation (finalAttrs: {
     libxml2
     jansson
   ]
-  ++ lib.optional stdenv.isDarwin libiconv
-  ++ lib.optional stdenv.isLinux libseccomp;
+  ++ lib.optional stdenv.hostPlatform.isDarwin libiconv
+  ++ lib.optional stdenv.hostPlatform.isLinux libseccomp;
 
   configureFlags = [ "--enable-tmpdir=/tmp" ];
 
diff --git a/pkgs/by-name/un/unrar-free/package.nix b/pkgs/by-name/un/unrar-free/package.nix
index 176a01a45640..72ca626c8933 100644
--- a/pkgs/by-name/un/unrar-free/package.nix
+++ b/pkgs/by-name/un/unrar-free/package.nix
@@ -37,6 +37,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "unrar-free";
     maintainers = with lib.maintainers; [ thiagokokada ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/up/upsun/package.nix b/pkgs/by-name/up/upsun/package.nix
index 378226a1cbd4..fd1242e59330 100644
--- a/pkgs/by-name/up/upsun/package.nix
+++ b/pkgs/by-name/up/upsun/package.nix
@@ -8,11 +8,11 @@
 }:
 
 let versions = lib.importJSON ./versions.json;
-    arch = if stdenvNoCC.isx86_64 then "amd64"
-           else if stdenvNoCC.isAarch64 then "arm64"
+    arch = if stdenvNoCC.hostPlatform.isx86_64 then "amd64"
+           else if stdenvNoCC.hostPlatform.isAarch64 then "arm64"
            else throw "Unsupported architecture";
-    os = if stdenvNoCC.isLinux then "linux"
-         else if stdenvNoCC.isDarwin then "darwin"
+    os = if stdenvNoCC.hostPlatform.isLinux then "linux"
+         else if stdenvNoCC.hostPlatform.isDarwin then "darwin"
          else throw "Unsupported os";
     versionInfo = versions."${os}-${arch}";
     inherit (versionInfo) hash url;
diff --git a/pkgs/by-name/ut/ut1999/package.nix b/pkgs/by-name/ut/ut1999/package.nix
index 98f4690eb21c..db063696996f 100644
--- a/pkgs/by-name/ut/ut1999/package.nix
+++ b/pkgs/by-name/ut/ut1999/package.nix
@@ -63,21 +63,21 @@ in stdenv.mkDerivation {
     stdenv.cc.cc
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     copyDesktopItems
     autoPatchelfHook
     imagemagick
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     undmg
   ];
 
   installPhase = let
-    outPrefix = if stdenv.isDarwin then "$out/UnrealTournament.app/Contents/MacOS" else "$out";
+    outPrefix = if stdenv.hostPlatform.isDarwin then "$out/UnrealTournament.app/Contents/MacOS" else "$out";
   in ''
     runHook preInstall
 
     mkdir -p $out/bin
-    cp -r ${if stdenv.isDarwin then "UnrealTournament.app" else "./*"} $out
+    cp -r ${if stdenv.hostPlatform.isDarwin then "UnrealTournament.app" else "./*"} $out
     chmod -R 755 $out
     cd ${outPrefix}
 
@@ -86,7 +86,7 @@ in stdenv.mkDerivation {
 
     cp -n ${unpackGog}/Textures/* ./Textures || true
     cp -n ${unpackGog}/System/*.{u,int} ./System || true
-  '' + lib.optionalString (stdenv.isLinux) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isLinux) ''
     ln -s "$out/${systemDir}/ut-bin" "$out/bin/ut1999"
     ln -s "$out/${systemDir}/ucc-bin" "$out/bin/ut1999-ucc"
 
diff --git a/pkgs/by-name/uv/uv/package.nix b/pkgs/by-name/uv/uv/package.nix
index 96e5941d73f0..7b507ceebd62 100644
--- a/pkgs/by-name/uv/uv/package.nix
+++ b/pkgs/by-name/uv/uv/package.nix
@@ -46,7 +46,7 @@ python3Packages.buildPythonApplication rec {
 
   buildInputs = [
     libiconv
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   dontUseCmakeConfigure = true;
 
diff --git a/pkgs/by-name/ux/uxn/package.nix b/pkgs/by-name/ux/uxn/package.nix
index 721d82c6fdd6..0a9db5026aa3 100644
--- a/pkgs/by-name/ux/uxn/package.nix
+++ b/pkgs/by-name/ux/uxn/package.nix
@@ -64,6 +64,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ AndersonTorres ];
     mainProgram = "uxnemu";
     inherit (SDL2.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/va/vale-ls/package.nix b/pkgs/by-name/va/vale-ls/package.nix
index a6a84d4a2ce0..0a09952d51af 100644
--- a/pkgs/by-name/va/vale-ls/package.nix
+++ b/pkgs/by-name/va/vale-ls/package.nix
@@ -28,14 +28,14 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     SystemConfiguration
   ]);
 
   checkFlags = [
     # The following tests are reaching to the network.
     "--skip=vale::tests"
-  ] ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
     # This test does not account for the existence of aarch64-linux machines,
     # despite upstream shipping artifacts for that architecture
     "--skip=utils::tests::arch"
diff --git a/pkgs/by-name/va/valkey/package.nix b/pkgs/by-name/va/valkey/package.nix
index 1a97c09ebd29..d44232121660 100644
--- a/pkgs/by-name/va/valkey/package.nix
+++ b/pkgs/by-name/va/valkey/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional withSystemd systemd
     ++ lib.optional tlsSupport openssl;
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/Makefile --replace-fail "-flto" ""
   '';
 
@@ -42,12 +42,12 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
+  hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
 
   env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.cc.isClang [ "-std=c11" ]);
 
   # darwin currently lacks a pure `pgrep` which is extensively used here
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [ which tcl ps ] ++ lib.optionals stdenv.hostPlatform.isStatic [ getconf ];
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/by-name/va/vapoursynth/package.nix b/pkgs/by-name/va/vapoursynth/package.nix
index 278cf1e56778..7a40f1eba1c2 100644
--- a/pkgs/by-name/va/vapoursynth/package.nix
+++ b/pkgs/by-name/va/vapoursynth/package.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
         ]
       ))
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       ApplicationServices
     ];
@@ -93,7 +93,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin; # see https://github.com/NixOS/nixpkgs/pull/189446 for partial fix
+    broken = stdenv.hostPlatform.isDarwin; # see https://github.com/NixOS/nixpkgs/pull/189446 for partial fix
     description = "Video processing framework with the future in mind";
     homepage = "http://www.vapoursynth.com/";
     license = licenses.lgpl21;
diff --git a/pkgs/by-name/va/vatprism/package.nix b/pkgs/by-name/va/vatprism/package.nix
index c13e0b0cf082..bdc406091d00 100644
--- a/pkgs/by-name/va/vatprism/package.nix
+++ b/pkgs/by-name/va/vatprism/package.nix
@@ -60,7 +60,7 @@ maven.buildMavenPackage rec {
   ];
 
   mvnHash =
-    if (stdenv.isLinux && stdenv.isAarch64) then
+    if (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) then
       "sha256-x0nFt2C7dZqMdllI1+Io9SPBY2J/dVgBTVb9T24vFFI="
     else
       "sha256-9uyNCUqnMgpiwm2kz544pWNB/SkRpASm2Dln0e4yZos=";
diff --git a/pkgs/by-name/ve/vesktop/package.nix b/pkgs/by-name/ve/vesktop/package.nix
index 6d65fe99d89a..4979bd32bd80 100644
--- a/pkgs/by-name/ve/vesktop/package.nix
+++ b/pkgs/by-name/ve/vesktop/package.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation (finalAttrs: {
       nodejs
       pnpm_9.configHook
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       # vesktop uses venmic, which is a shipped as a prebuilt node module
       # and needs to be patched
       autoPatchelfHook
@@ -57,12 +57,12 @@ stdenv.mkDerivation (finalAttrs: {
       # https://github.com/NixOS/nixpkgs/issues/172583
       makeWrapper
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # on macos we don't need to expand variables, so we can use the faster binary wrapper
       makeBinaryWrapper
     ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libpulseaudio
     pipewire
     stdenv.cc.cc.lib
@@ -81,12 +81,12 @@ stdenv.mkDerivation (finalAttrs: {
 
   # disable code signing on macos
   # https://github.com/electron-userland/electron-builder/blob/77f977435c99247d5db395895618b150f5006e8f/docs/code-signing.md#how-to-disable-code-signing-during-the-build-process-on-macos
-  postConfigure = lib.optionalString stdenv.isDarwin ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export CSC_IDENTITY_AUTO_DISCOVERY=false
   '';
 
   # electron builds must be writable on darwin
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp -r ${electron.dist}/Electron.app .
     chmod -R u+w Electron.app
   '';
@@ -98,13 +98,13 @@ stdenv.mkDerivation (finalAttrs: {
     pnpm exec electron-builder \
       --dir \
       -c.asarUnpack="**/*.node" \
-      -c.electronDist=${if stdenv.isDarwin then "." else electron.dist} \
+      -c.electronDist=${if stdenv.hostPlatform.isDarwin then "." else electron.dist} \
       -c.electronVersion=${electron.version}
 
     runHook postBuild
   '';
 
-  postBuild = lib.optionalString stdenv.isLinux ''
+  postBuild = lib.optionalString stdenv.hostPlatform.isLinux ''
     pushd build
     ${libicns}/bin/icns2png -x icon.icns
     popd
@@ -114,7 +114,7 @@ stdenv.mkDerivation (finalAttrs: {
     ''
       runHook preInstall
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/opt/Vesktop
       cp -r dist/*unpacked/resources $out/opt/Vesktop/
 
@@ -123,7 +123,7 @@ stdenv.mkDerivation (finalAttrs: {
         install -Dm0644 $file $out/share/icons/hicolor/''${file_suffix//x32.png}/apps/vesktop.png
       done
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $out/{Applications,bin}
       mv dist/mac*/Vesktop.App $out/Applications
     ''
@@ -132,18 +132,18 @@ stdenv.mkDerivation (finalAttrs: {
     '';
 
   postFixup =
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       makeWrapper ${electron}/bin/electron $out/bin/vesktop \
         --add-flags $out/opt/Vesktop/resources/app.asar \
         ${lib.optionalString withTTS "--add-flags \"--enable-speech-dispatcher\""} \
         ${lib.optionalString withMiddleClickScroll "--add-flags \"--enable-blink-features=MiddleClickAutoscroll\""} \
         --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --enable-wayland-ime}}"
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       makeWrapper $out/Applications/Vesktop.app/Contents/MacOS/Vesktop $out/bin/vesktop
     '';
 
-  desktopItems = lib.optional stdenv.isLinux (makeDesktopItem {
+  desktopItems = lib.optional stdenv.hostPlatform.isLinux (makeDesktopItem {
     name = "vesktop";
     desktopName = "Vesktop";
     exec = "vesktop %U";
diff --git a/pkgs/by-name/vi/vieb/package.nix b/pkgs/by-name/vi/vieb/package.nix
index 6927cb3e24af..af524a450e4d 100644
--- a/pkgs/by-name/vi/vieb/package.nix
+++ b/pkgs/by-name/vi/vieb/package.nix
@@ -20,7 +20,7 @@ buildNpmPackage rec {
   dontNpmBuild = true;
   env.ELECTRON_SKIP_BINARY_DOWNLOAD = 1;
 
-  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.isAarch64 python3;
+  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.hostPlatform.isAarch64 python3;
 
   desktopItem = makeDesktopItem {
     name = "vieb";
diff --git a/pkgs/by-name/vi/vis/package.nix b/pkgs/by-name/vi/vis/package.nix
index f16f717e7dc8..7d37d022a86a 100644
--- a/pkgs/by-name/vi/vis/package.nix
+++ b/pkgs/by-name/vi/vis/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     libtermkey
     luaEnv
     tre
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     acl
     libselinux
   ];
diff --git a/pkgs/by-name/vl/vlc-bin/package.nix b/pkgs/by-name/vl/vlc-bin/package.nix
index 275e768c7ea2..9e496883ccb8 100644
--- a/pkgs/by-name/vl/vlc-bin/package.nix
+++ b/pkgs/by-name/vl/vlc-bin/package.nix
@@ -4,9 +4,9 @@
 , stdenv
 , undmg
 , variant ?
-  if (stdenv.isDarwin && stdenv.isAarch64)
+  if (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
   then "arm64"
-  else if (stdenv.isDarwin && stdenv.isx86_64)
+  else if (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64)
   then "intel64"
   else "universal" # not reachable by normal means
 }:
diff --git a/pkgs/by-name/vo/volk_2/package.nix b/pkgs/by-name/vo/volk_2/package.nix
index 447922865cbf..57b849fcc28b 100644
--- a/pkgs/by-name/vo/volk_2/package.nix
+++ b/pkgs/by-name/vo/volk_2/package.nix
@@ -37,13 +37,13 @@ stdenv.mkDerivation (finalAttrs: {
 
   cmakeFlags =
     [ (lib.cmakeBool "ENABLE_MODTOOL" enableModTool) ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # offset 14335 in1: -1.03372 in2: -1.03371 tolerance was: 1e-05
       # volk_32f_log2_32f: fail on arch neon
       "-DCMAKE_CTEST_ARGUMENTS=--exclude-regex;qa_volk_32f_log2_32f"
     ];
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     remove-references-to -t ${stdenv.cc} $(readlink -f $out/lib/libvolk.so)
   '';
 
diff --git a/pkgs/by-name/vs/vsce/package.nix b/pkgs/by-name/vs/vsce/package.nix
index 873b4e2c1af3..1ecf3d9204d6 100644
--- a/pkgs/by-name/vs/vsce/package.nix
+++ b/pkgs/by-name/vs/vsce/package.nix
@@ -30,7 +30,7 @@ buildNpmPackage rec {
   nativeBuildInputs = [ pkg-config python3 ];
 
   buildInputs = [ libsecret ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit Security ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit Security ]);
 
   makeCacheWritable = true;
   npmFlags = [ "--legacy-peer-deps" ];
diff --git a/pkgs/by-name/vs/vscode-js-debug/package.nix b/pkgs/by-name/vs/vscode-js-debug/package.nix
index b16717bf5d52..bde7ae221517 100644
--- a/pkgs/by-name/vs/vscode-js-debug/package.nix
+++ b/pkgs/by-name/vs/vscode-js-debug/package.nix
@@ -30,11 +30,11 @@ buildNpmPackage rec {
   nativeBuildInputs = [
     pkg-config
     node-gyp
-  ] ++ lib.optionals stdenv.isDarwin [ xcbuild ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   buildInputs =
-    lib.optionals (!stdenv.isDarwin) [ libsecret ]
-    ++ lib.optionals stdenv.isDarwin [
+    lib.optionals (!stdenv.hostPlatform.isDarwin) [ libsecret ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Security
       AppKit
     ];
diff --git a/pkgs/by-name/vv/vvvvvv/package.nix b/pkgs/by-name/vv/vvvvvv/package.nix
index c4ed05616620..471a84eecb89 100644
--- a/pkgs/by-name/vv/vvvvvv/package.nix
+++ b/pkgs/by-name/vv/vvvvvv/package.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     physfs
     SDL2
     tinyxml-2
-  ] ++ lib.optionals stdenv.isDarwin [ Foundation IOKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation IOKit ];
 
   cmakeDir = "../desktop_version";
 
diff --git a/pkgs/by-name/wa/wapm/package.nix b/pkgs/by-name/wa/wapm/package.nix
index 94d97dbfc285..420baa5baeb3 100644
--- a/pkgs/by-name/wa/wapm/package.nix
+++ b/pkgs/by-name/wa/wapm/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ perl ];
 
   buildInputs = [ libiconv openssl ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
 
   doCheck = false;
 
diff --git a/pkgs/by-name/wa/warp-terminal/package.nix b/pkgs/by-name/wa/warp-terminal/package.nix
index 71c23dc8f751..adb2b2614e82 100644
--- a/pkgs/by-name/wa/warp-terminal/package.nix
+++ b/pkgs/by-name/wa/warp-terminal/package.nix
@@ -109,6 +109,6 @@ meta = with lib; {
 };
 
 in
-if stdenvNoCC.isDarwin
+if stdenvNoCC.hostPlatform.isDarwin
 then darwin
 else linux
diff --git a/pkgs/by-name/wa/wash-cli/package.nix b/pkgs/by-name/wa/wash-cli/package.nix
index d5b3ebecf8cd..663273e54e4b 100644
--- a/pkgs/by-name/wa/wash-cli/package.nix
+++ b/pkgs/by-name/wa/wash-cli/package.nix
@@ -24,7 +24,7 @@ in rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.SystemConfiguration
       darwin.apple_sdk.frameworks.CoreServices
     ];
diff --git a/pkgs/by-name/wa/wasm-bindgen-cli/package.nix b/pkgs/by-name/wa/wasm-bindgen-cli/package.nix
index 517b2813478f..d9b997805440 100644
--- a/pkgs/by-name/wa/wasm-bindgen-cli/package.nix
+++ b/pkgs/by-name/wa/wasm-bindgen-cli/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       curl
       darwin.apple_sdk.frameworks.Security
     ];
diff --git a/pkgs/by-name/wa/wastebin/package.nix b/pkgs/by-name/wa/wastebin/package.nix
index cdc5feb24b80..f63429bff248 100644
--- a/pkgs/by-name/wa/wastebin/package.nix
+++ b/pkgs/by-name/wa/wastebin/package.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     sqlite
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/wa/waybar/package.nix b/pkgs/by-name/wa/waybar/package.nix
index fe8143c2eb49..e0eb7a76eda0 100644
--- a/pkgs/by-name/wa/waybar/package.nix
+++ b/pkgs/by-name/wa/waybar/package.nix
@@ -53,7 +53,7 @@
   inputSupport ? true,
   jackSupport ? true,
   mpdSupport ? true,
-  mprisSupport ? stdenv.isLinux,
+  mprisSupport ? stdenv.hostPlatform.isLinux,
   nlSupport ? true,
   pipewireSupport ? true,
   pulseSupport ? true,
@@ -158,7 +158,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional upowerSupport upower
     ++ lib.optional wireplumberSupport wireplumber
     ++ lib.optional (cavaSupport || pipewireSupport) pipewire
-    ++ lib.optional (!stdenv.isLinux) libinotify-kqueue;
+    ++ lib.optional (!stdenv.hostPlatform.isLinux) libinotify-kqueue;
 
   nativeCheckInputs = [ catch2_3 ];
   doCheck = runTests;
diff --git a/pkgs/by-name/we/weaver/package.nix b/pkgs/by-name/we/weaver/package.nix
index 22b5c9ef93a8..7734b0d6f585 100644
--- a/pkgs/by-name/we/weaver/package.nix
+++ b/pkgs/by-name/we/weaver/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-4rHDulSsFvKly5M5bo1AtEAl280N/hxhznTngCxw36Y=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk_11_0.frameworks; [ SystemConfiguration ]
   );
 
diff --git a/pkgs/by-name/we/werf/package.nix b/pkgs/by-name/we/werf/package.nix
index aa914fdd8f7a..9f55f565d525 100644
--- a/pkgs/by-name/we/werf/package.nix
+++ b/pkgs/by-name/we/werf/package.nix
@@ -29,10 +29,10 @@ buildGoModule rec {
   nativeBuildInputs = [ installShellFiles ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [ btrfs-progs ]
+    lib.optionals stdenv.hostPlatform.isLinux [ btrfs-progs ]
     ++ lib.optionals stdenv.hostPlatform.isGnu [ stdenv.cc.libc.static ];
 
-  CGO_ENABLED = if stdenv.isLinux then 1 else 0;
+  CGO_ENABLED = if stdenv.hostPlatform.isLinux then 1 else 0;
 
   ldflags =
     [
diff --git a/pkgs/by-name/wi/wiliwili/package.nix b/pkgs/by-name/wi/wiliwili/package.nix
index 302b47b65b4e..85cc143f45f6 100644
--- a/pkgs/by-name/wi/wiliwili/package.nix
+++ b/pkgs/by-name/wi/wiliwili/package.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wayland-scanner
   ];
 
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
     curl
     libxkbcommon
     dbus
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libffi # needed for wayland
     wayland
     egl-wayland
@@ -55,8 +55,8 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     (lib.cmakeBool "PLATFORM_DESKTOP" true)
     (lib.cmakeBool "INSTALL" true)
-    (lib.cmakeBool "GLFW_BUILD_WAYLAND" stdenv.isLinux)
-    (lib.cmakeBool "GLFW_BUILD_X11" stdenv.isLinux)
+    (lib.cmakeBool "GLFW_BUILD_WAYLAND" stdenv.hostPlatform.isLinux)
+    (lib.cmakeBool "GLFW_BUILD_X11" stdenv.hostPlatform.isLinux)
     # Otherwise cpr cmake will try to download zlib
     (lib.cmakeBool "CPR_FORCE_USE_SYSTEM_CURL" true)
   ];
diff --git a/pkgs/by-name/wi/wiper/package.nix b/pkgs/by-name/wi/wiper/package.nix
index 3eb069de236a..1540bbda4bc4 100644
--- a/pkgs/by-name/wi/wiper/package.nix
+++ b/pkgs/by-name/wi/wiper/package.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-gYWTv0AXOmpx9Nc8akBMVWkESI0AtnGgvfH9hQZ0peo=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Foundation ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Foundation ];
 
   meta = {
     description = "Disk analyser and cleanup tool";
diff --git a/pkgs/by-name/wl/wl-clip-persist/package.nix b/pkgs/by-name/wl/wl-clip-persist/package.nix
index 3b31f14f8c20..cfa8eced287f 100644
--- a/pkgs/by-name/wl/wl-clip-persist/package.nix
+++ b/pkgs/by-name/wl/wl-clip-persist/package.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [ wayland ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Keep Wayland clipboard even after programs close";
     homepage = "https://github.com/Linus789/wl-clip-persist";
     inherit (wayland.meta) platforms;
diff --git a/pkgs/by-name/wl/wlx-overlay-s/package.nix b/pkgs/by-name/wl/wlx-overlay-s/package.nix
index c5fa7e2ffcb9..36d6ca6fa11d 100644
--- a/pkgs/by-name/wl/wlx-overlay-s/package.nix
+++ b/pkgs/by-name/wl/wlx-overlay-s/package.nix
@@ -98,7 +98,7 @@ rustPlatform.buildRustPackage rec {
     license = lib.licenses.gpl3Only;
     maintainers = with lib.maintainers; [ Scrumplex ];
     platforms = lib.platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     mainProgram = "wlx-overlay-s";
   };
 }
diff --git a/pkgs/by-name/ws/wslay/package.nix b/pkgs/by-name/ws/wslay/package.nix
index 45054f8130f1..85f3294ebabe 100644
--- a/pkgs/by-name/ws/wslay/package.nix
+++ b/pkgs/by-name/ws/wslay/package.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
 
   checkInputs = [ cunit ];
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH=$(pwd)/lib/.libs
   '';
 
diff --git a/pkgs/by-name/wt/wttrbar/package.nix b/pkgs/by-name/wt/wttrbar/package.nix
index b844b826a932..0110caec8e50 100644
--- a/pkgs/by-name/wt/wttrbar/package.nix
+++ b/pkgs/by-name/wt/wttrbar/package.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-fuLKWooXn966RORH20D9wwbjNtyLEZOO8Y8RcjsFwqM=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks; [ Security SystemConfiguration ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [ Security SystemConfiguration ]);
 
   cargoHash = "sha256-Of1tHKIL2XbzA6YFxtvaP9sa+KMw8uJTFG0n84g2Eog=";
 
diff --git a/pkgs/by-name/wt/wtwitch/package.nix b/pkgs/by-name/wt/wtwitch/package.nix
index 0035e184540c..73bfe1c3fd62 100644
--- a/pkgs/by-name/wt/wtwitch/package.nix
+++ b/pkgs/by-name/wt/wtwitch/package.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     install -Dm755 src/wtwitch $out/bin/wtwitch
     wrapProgram $out/bin/wtwitch \
       --set-default LANG en_US.UTF-8 \
-      --prefix PATH : ${lib.makeBinPath (lib.optionals stdenv.isLinux [ vlc ] ++ [
+      --prefix PATH : ${lib.makeBinPath (lib.optionals stdenv.hostPlatform.isLinux [ vlc ] ++ [
         bash
         coreutils-prefixed
         curl
diff --git a/pkgs/by-name/x1/x16/package.nix b/pkgs/by-name/x1/x16/package.nix
index b6f8926a4d1c..26a12e480e7f 100644
--- a/pkgs/by-name/x1/x16/package.nix
+++ b/pkgs/by-name/x1/x16/package.nix
@@ -57,6 +57,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ AndersonTorres ];
     mainProgram = "x16emu";
     inherit (SDL2.meta) platforms;
-    broken = stdenv.isAarch64; # ofborg fails to compile it
+    broken = stdenv.hostPlatform.isAarch64; # ofborg fails to compile it
   };
 })
diff --git a/pkgs/by-name/x1/x16/rom.nix b/pkgs/by-name/x1/x16/rom.nix
index 989e81094159..ed85dd5108ac 100644
--- a/pkgs/by-name/x1/x16/rom.nix
+++ b/pkgs/by-name/x1/x16/rom.nix
@@ -54,6 +54,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.bsd2;
     maintainers = with lib.maintainers; [ AndersonTorres ];
     inherit (cc65.meta) platforms;
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/by-name/xd/xdg-user-dirs/package.nix b/pkgs/by-name/xd/xdg-user-dirs/package.nix
index 5d141eb8049c..98d95290ca1e 100644
--- a/pkgs/by-name/xd/xdg-user-dirs/package.nix
+++ b/pkgs/by-name/xd/xdg-user-dirs/package.nix
@@ -18,13 +18,13 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-7G8G10lc26N6cyA5+bXhV4vLKWV2/eDaQO2y9SIg3zw=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeBuildInputs = [
     makeWrapper
     libxslt
     docbook_xsl
-  ] ++ lib.optionals stdenv.isDarwin [ gettext ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ gettext ];
 
   preFixup = ''
     # fallback values need to be last
diff --git a/pkgs/by-name/xe/xevd/package.nix b/pkgs/by-name/xe/xevd/package.nix
index d5ba1995bb14..fc5c80e31bbb 100644
--- a/pkgs/by-name/xe/xevd/package.nix
+++ b/pkgs/by-name/xe/xevd/package.nix
@@ -99,6 +99,6 @@ stdenv.mkDerivation (finalAttrs: {
     pkgConfigModules = [ "xevd" ];
     maintainers = with lib.maintainers; [ jopejoe1 ];
     platforms = lib.platforms.all;
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/by-name/xe/xeve/package.nix b/pkgs/by-name/xe/xeve/package.nix
index f8acbee0acc0..2f9f2b029d21 100644
--- a/pkgs/by-name/xe/xeve/package.nix
+++ b/pkgs/by-name/xe/xeve/package.nix
@@ -102,6 +102,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "xeve_app";
     maintainers = with lib.maintainers; [ jopejoe1 ];
     platforms = lib.platforms.all;
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/by-name/xi/xiu/package.nix b/pkgs/by-name/xi/xiu/package.nix
index 30b692690124..fe5ab564e9f7 100644
--- a/pkgs/by-name/xi/xiu/package.nix
+++ b/pkgs/by-name/xi/xiu/package.nix
@@ -29,9 +29,9 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     libopus
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/by-name/xm/xml-tooling-c/package.nix b/pkgs/by-name/xm/xml-tooling-c/package.nix
index 921175c3e879..709bfee14bb4 100644
--- a/pkgs/by-name/xm/xml-tooling-c/package.nix
+++ b/pkgs/by-name/xm/xml-tooling-c/package.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     pkg-config
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.isDarwin) "-std=c++14";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.hostPlatform.isDarwin) "-std=c++14";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/by-name/xp/xplr/package.nix b/pkgs/by-name/xp/xplr/package.nix
index 0bdfdfbc8a2c..b75adabdfdc7 100644
--- a/pkgs/by-name/xp/xplr/package.nix
+++ b/pkgs/by-name/xp/xplr/package.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-RZgdWhVBZozYxbbNslCBLhN6EnogpyVXvht6GbzLnPs=";
 
   # fixes `thread 'main' panicked at 'cannot find strip'` on x86_64-darwin
-  env = lib.optionalAttrs (stdenv.isx86_64 && stdenv.isDarwin) {
+  env = lib.optionalAttrs (stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin) {
     TARGET_STRIP = "${stdenv.cc.targetPrefix}strip";
   };
 
diff --git a/pkgs/by-name/xs/xsimd/package.nix b/pkgs/by-name/xs/xsimd/package.nix
index 8f8c72bc3f6a..622f11f400bc 100644
--- a/pkgs/by-name/xs/xsimd/package.nix
+++ b/pkgs/by-name/xs/xsimd/package.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
       url = "https://github.com/xtensor-stack/xsimd/commit/c8a87ed6e04b6782f48f94713adfb0cad6c11ddf.patch";
       hash = "sha256-2/FvBGdqTPcayD7rdHPSzL+F8IYKAfMW0WBJ0cW9EZ0=";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # https://github.com/xtensor-stack/xsimd/issues/1030
     ./disable-test_error_gamma.patch
   ];
diff --git a/pkgs/by-name/ya/yabai/package.nix b/pkgs/by-name/ya/yabai/package.nix
index 9cc32a64fff7..863b3b4fafad 100644
--- a/pkgs/by-name/ya/yabai/package.nix
+++ b/pkgs/by-name/ya/yabai/package.nix
@@ -23,7 +23,7 @@ let
     SkyLight
     ;
 
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   pname = "yabai";
@@ -40,12 +40,12 @@ stdenv'.mkDerivation (finalAttrs: {
 
   nativeBuildInputs =
     [ installShellFiles ]
-    ++ lib.optionals stdenv.isx86_64 [
+    ++ lib.optionals stdenv.hostPlatform.isx86_64 [
       xcodebuild
       xxd
     ];
 
-  buildInputs = lib.optionals stdenv.isx86_64 [
+  buildInputs = lib.optionals stdenv.hostPlatform.isx86_64 [
     Carbon
     Cocoa
     ScriptingBridge
@@ -53,7 +53,7 @@ stdenv'.mkDerivation (finalAttrs: {
   ];
 
   dontConfigure = true;
-  dontBuild = stdenv.isAarch64;
+  dontBuild = stdenv.hostPlatform.isAarch64;
   enableParallelBuilding = true;
 
   installPhase = ''
@@ -62,14 +62,14 @@ stdenv'.mkDerivation (finalAttrs: {
     mkdir -p $out/{bin,share/icons/hicolor/scalable/apps}
 
     cp ./bin/yabai $out/bin/yabai
-    ${lib.optionalString stdenv.isx86_64 "cp ./assets/icon/icon.svg $out/share/icons/hicolor/scalable/apps/yabai.svg"}
+    ${lib.optionalString stdenv.hostPlatform.isx86_64 "cp ./assets/icon/icon.svg $out/share/icons/hicolor/scalable/apps/yabai.svg"}
     installManPage ./doc/yabai.1
 
     runHook postInstall
   '';
 
   postPatch =
-    lib.optionalString stdenv.isx86_64 # bash
+    lib.optionalString stdenv.hostPlatform.isx86_64 # bash
       ''
         # aarch64 code is compiled on all targets, which causes our Apple SDK headers to error out.
         # Since multilib doesn't work on darwin i dont know of a better way of handling this.
@@ -146,6 +146,6 @@ stdenv'.mkDerivation (finalAttrs: {
     ];
     sourceProvenance =
       with lib.sourceTypes;
-      lib.optionals stdenv.isx86_64 [ fromSource ] ++ lib.optionals stdenv.isAarch64 [ binaryNativeCode ];
+      lib.optionals stdenv.hostPlatform.isx86_64 [ fromSource ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [ binaryNativeCode ];
   };
 })
diff --git a/pkgs/by-name/ya/yapesdl/package.nix b/pkgs/by-name/ya/yapesdl/package.nix
index 44bb2a0dbaf8..9b974c3eebe2 100644
--- a/pkgs/by-name/ya/yapesdl/package.nix
+++ b/pkgs/by-name/ya/yapesdl/package.nix
@@ -47,6 +47,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "yapesdl";
     maintainers = with lib.maintainers; [ AndersonTorres ];
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/by-name/ya/yazi-unwrapped/package.nix b/pkgs/by-name/ya/yazi-unwrapped/package.nix
index 3245be8f3144..561eea7fdb0d 100644
--- a/pkgs/by-name/ya/yazi-unwrapped/package.nix
+++ b/pkgs/by-name/ya/yazi-unwrapped/package.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   env.VERGEN_BUILD_DATE = "2024-09-04";
 
   nativeBuildInputs = [ installShellFiles ];
-  buildInputs = [ rust-jemalloc-sys ] ++ lib.optionals stdenv.isDarwin [ Foundation ];
+  buildInputs = [ rust-jemalloc-sys ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   postInstall = ''
     installShellCompletion --cmd yazi \
diff --git a/pkgs/by-name/yc/ycmd/package.nix b/pkgs/by-name/yc/ycmd/package.nix
index 325a8d95e6bc..56a384df64f5 100644
--- a/pkgs/by-name/yc/ycmd/package.nix
+++ b/pkgs/by-name/yc/ycmd/package.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
     ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
   buildInputs = with python.pkgs; with llvmPackages; [ abseil-cpp boost libllvm.all libclang.all ]
     ++ [ jedi jedi-language-server pybind11 ]
-    ++ lib.optional stdenv.isDarwin Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   buildPhase = ''
     export EXTRA_CMAKE_ARGS="-DPATH_TO_LLVM_ROOT=${llvmPackages.libllvm} -DUSE_SYSTEM_ABSEIL=true"
diff --git a/pkgs/by-name/ye/yesplaymusic/package.nix b/pkgs/by-name/ye/yesplaymusic/package.nix
index 9a20e9ecf312..077ba8775879 100644
--- a/pkgs/by-name/ye/yesplaymusic/package.nix
+++ b/pkgs/by-name/ye/yesplaymusic/package.nix
@@ -74,7 +74,7 @@ let
     platforms = builtins.attrNames srcs;
   };
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then stdenv.mkDerivation {
   inherit pname version src meta;
 
diff --git a/pkgs/by-name/yt/ytui-music/package.nix b/pkgs/by-name/yt/ytui-music/package.nix
index 3c460082b27e..0e520955e057 100644
--- a/pkgs/by-name/yt/ytui-music/package.nix
+++ b/pkgs/by-name/yt/ytui-music/package.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     sqlite
     mpv
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/by-name/yu/yubico-piv-tool/package.nix b/pkgs/by-name/yu/yubico-piv-tool/package.nix
index ba0476862841..69665583f2e4 100644
--- a/pkgs/by-name/yu/yubico-piv-tool/package.nix
+++ b/pkgs/by-name/yu/yubico-piv-tool/package.nix
@@ -13,7 +13,7 @@
   stdenv,
   testers,
   zlib,
-  withApplePCSC ? stdenv.isDarwin,
+  withApplePCSC ? stdenv.hostPlatform.isDarwin,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/by-name/za/zapret/package.nix b/pkgs/by-name/za/zapret/package.nix
index 658d525bf36f..4cb0f099e08f 100644
--- a/pkgs/by-name/za/zapret/package.nix
+++ b/pkgs/by-name/za/zapret/package.nix
@@ -77,6 +77,6 @@ stdenv.mkDerivation {
     mainProgram = "zapret";
 
     # probably gonna work on darwin, but untested
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/zc/zchunk/package.nix b/pkgs/by-name/zc/zchunk/package.nix
index 0e7df32c08a9..e0450116f5b9 100644
--- a/pkgs/by-name/zc/zchunk/package.nix
+++ b/pkgs/by-name/zc/zchunk/package.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     curl
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [ argp-standalone ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ argp-standalone ];
 
   outputs = [
     "out"
diff --git a/pkgs/by-name/ze/zed-editor/package.nix b/pkgs/by-name/ze/zed-editor/package.nix
index 2088a1ac98f5..9ee49b8ef6e2 100644
--- a/pkgs/by-name/ze/zed-editor/package.nix
+++ b/pkgs/by-name/ze/zed-editor/package.nix
@@ -35,7 +35,7 @@
   withGLES ? false,
 }:
 
-assert withGLES -> stdenv.isLinux;
+assert withGLES -> stdenv.hostPlatform.isLinux;
 
 let
   executableName = "zeditor";
@@ -130,7 +130,7 @@ rustPlatform.buildRustPackage rec {
     protobuf
     rustPlatform.bindgenHook
     cargo-about
-  ] ++ lib.optionals stdenv.isDarwin [ xcbuild.xcrun ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild.xcrun ];
 
   buildInputs =
     [
@@ -143,13 +143,13 @@ rustPlatform.buildRustPackage rec {
       zlib
       zstd
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
       libxkbcommon
       wayland
       xorg.libxcb
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AppKit
@@ -196,7 +196,7 @@ rustPlatform.buildRustPackage rec {
     bash script/generate-licenses
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --add-rpath ${gpu-lib}/lib $out/libexec/*
     patchelf --add-rpath ${wayland}/lib $out/libexec/*
   '';
@@ -265,6 +265,6 @@ rustPlatform.buildRustPackage rec {
     mainProgram = "zeditor";
     platforms = lib.platforms.all;
     # Currently broken on darwin: https://github.com/NixOS/nixpkgs/pull/303233#issuecomment-2048650618
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/by-name/ze/zerotierone/package.nix b/pkgs/by-name/ze/zerotierone/package.nix
index eb09f58e888a..728ec4ee3c37 100644
--- a/pkgs/by-name/ze/zerotierone/package.nix
+++ b/pkgs/by-name/ze/zerotierone/package.nix
@@ -77,7 +77,7 @@ in stdenv.mkDerivation {
     lzo
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk.frameworks.SystemConfiguration
     darwin.apple_sdk.frameworks.CoreServices
@@ -88,7 +88,7 @@ in stdenv.mkDerivation {
   # Ensure Rust compiles for the right target
   env.CARGO_BUILD_TARGET = stdenv.hostPlatform.rust.rustcTarget;
 
-  preBuild = if stdenv.isDarwin then ''
+  preBuild = if stdenv.hostPlatform.isDarwin then ''
     makeFlagsArray+=("ARCH_FLAGS=") # disable multi-arch build
     if ! grep -q MACOS_VERSION_MIN=10.13 make-mac.mk; then
       echo "You may need to update MACOSX_DEPLOYMENT_TARGET to match the value in make-mac.mk"
diff --git a/pkgs/by-name/zo/zola/package.nix b/pkgs/by-name/zo/zola/package.nix
index e6fc773a2127..5f658eed3960 100644
--- a/pkgs/by-name/zo/zola/package.nix
+++ b/pkgs/by-name/zo/zola/package.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     oniguruma
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreServices SystemConfiguration
   ]);
 
diff --git a/pkgs/by-name/zo/zoom-us/package.nix b/pkgs/by-name/zo/zoom-us/package.nix
index 230825c93564..e64b20fce6d3 100644
--- a/pkgs/by-name/zo/zoom-us/package.nix
+++ b/pkgs/by-name/zo/zoom-us/package.nix
@@ -119,8 +119,8 @@ stdenv.mkDerivation rec {
 
   src = srcs.${system} or throwSystem;
 
-  dontUnpack = stdenv.isLinux;
-  unpackPhase = lib.optionalString stdenv.isDarwin ''
+  dontUnpack = stdenv.hostPlatform.isLinux;
+  unpackPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     xar -xf $src
     zcat < zoomus.pkg/Payload | cpio -i
   '';
@@ -128,7 +128,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     makeWrapper
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     xar
     cpio
   ];
@@ -151,9 +151,9 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
-  postFixup =  lib.optionalString stdenv.isDarwin ''
+  postFixup =  lib.optionalString stdenv.hostPlatform.isDarwin ''
     makeWrapper $out/Applications/zoom.us.app/Contents/MacOS/zoom.us $out/bin/zoom
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     # Desktop File
     substituteInPlace $out/share/applications/Zoom.desktop \
         --replace-fail "Exec=/usr/bin/zoom" "Exec=$out/bin/zoom"
diff --git a/pkgs/by-name/zu/zutty/package.nix b/pkgs/by-name/zu/zutty/package.nix
index 4a931a1c4eb0..bca3a376467f 100644
--- a/pkgs/by-name/zu/zutty/package.nix
+++ b/pkgs/by-name/zu/zutty/package.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   passthru = {
-    tests = lib.optionalAttrs stdenv.isLinux { default = nixosTests.terminal-emulators.zutty; };
+    tests = lib.optionalAttrs stdenv.hostPlatform.isLinux { default = nixosTests.terminal-emulators.zutty; };
   };
 
   meta = {
diff --git a/pkgs/data/fonts/iosevka/default.nix b/pkgs/data/fonts/iosevka/default.nix
index d563ff2ee344..7f7979c5bec5 100644
--- a/pkgs/data/fonts/iosevka/default.nix
+++ b/pkgs/data/fonts/iosevka/default.nix
@@ -69,7 +69,7 @@ buildNpmPackage rec {
   nativeBuildInputs = [
     remarshal
     ttfautohint-nox
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # libtool
     cctools
   ];
diff --git a/pkgs/data/fonts/uni-vga/default.nix b/pkgs/data/fonts/uni-vga/default.nix
index 1239b1238831..5be5a817b857 100644
--- a/pkgs/data/fonts/uni-vga/default.nix
+++ b/pkgs/data/fonts/uni-vga/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   nativeBuildInputs =
     [ bdftopcf libfaketime
       xorg.fonttosfnt xorg.mkfontscale
-    ] ++ lib.optionals stdenv.isLinux [ perl kbd ];
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [ perl kbd ];
 
   postPatch = "patchShebangs .";
 
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
     # convert bdf font to otb
     faketime -f "1970-01-01 00:00:01" \
     fonttosfnt -v -o u_vga16.otb u_vga16.bdf
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     # convert font to compressed psf
     ./bdf2psf.pl -s UniCyrX.sfm u_vga16.bdf \
       | psfaddtable - UniCyrX.sfm - \
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
     install -m 644 -D *.bdf -t "$bdf/share/fonts"
     mkfontdir "$bdf/share/fonts"
 
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     # install psf (for linux virtual terminal)
     install -m 644 -D *.psf.gz -t "$out/share/consolefonts"
   '';
diff --git a/pkgs/data/icons/gnome-icon-theme/default.nix b/pkgs/data/icons/gnome-icon-theme/default.nix
index 44b92c465bbe..22289b73c466 100644
--- a/pkgs/data/icons/gnome-icon-theme/default.nix
+++ b/pkgs/data/icons/gnome-icon-theme/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     platforms = platforms.unix;
     maintainers = [ maintainers.romildo ];
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gnome-icon-theme.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gnome-icon-theme.x86_64-darwin
   };
 }
diff --git a/pkgs/data/icons/volantes-cursors/default.nix b/pkgs/data/icons/volantes-cursors/default.nix
index 0e0871a00038..d76a0eda4cf0 100644
--- a/pkgs/data/icons/volantes-cursors/default.nix
+++ b/pkgs/data/icons/volantes-cursors/default.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation {
     license = licenses.gpl2;
     maintainers = with maintainers; [ jordanisaacs ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin && stdenv.isAarch64; # build timeout
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64; # build timeout
   };
 }
diff --git a/pkgs/data/misc/scowl/default.nix b/pkgs/data/misc/scowl/default.nix
index 4bfe201beb48..53988a728de3 100644
--- a/pkgs/data/misc/scowl/default.nix
+++ b/pkgs/data/misc/scowl/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ unzip zip perl aspell dos2unix ];
-  buildInputs = lib.optional (!stdenv.isLinux) libiconv;
+  buildInputs = lib.optional (!stdenv.hostPlatform.isLinux) libiconv;
 
   env.NIX_CFLAGS_COMPILE = "-Wno-narrowing";
 
diff --git a/pkgs/data/themes/adwaita-qt/default.nix b/pkgs/data/themes/adwaita-qt/default.nix
index 7a7f151c382b..90069dc48c35 100644
--- a/pkgs/data/themes/adwaita-qt/default.nix
+++ b/pkgs/data/themes/adwaita-qt/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     qtbase
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libxcb
   ] ++ lib.optionals (!useQt6) [
     qt5.qtx11extras
diff --git a/pkgs/desktops/enlightenment/enlightenment/default.nix b/pkgs/desktops/enlightenment/enlightenment/default.nix
index 25faa26687ae..198dae282dfa 100644
--- a/pkgs/desktops/enlightenment/enlightenment/default.nix
+++ b/pkgs/desktops/enlightenment/enlightenment/default.nix
@@ -16,7 +16,7 @@
 , udisks2
 , waylandSupport ? false, wayland-protocols, xwayland
 , bluetoothSupport ? true, bluez5
-, pulseSupport ? !stdenv.isDarwin, libpulseaudio
+, pulseSupport ? !stdenv.hostPlatform.isDarwin, libpulseaudio
 , directoryListingUpdater
 }:
 
diff --git a/pkgs/desktops/gnome-2/default.nix b/pkgs/desktops/gnome-2/default.nix
index 3f8d7c634096..67af761d3a38 100644
--- a/pkgs/desktops/gnome-2/default.nix
+++ b/pkgs/desktops/gnome-2/default.nix
@@ -5,7 +5,7 @@ lib.makeScope pkgs.newScope (self: with self; {
 #### PLATFORM
 
   libIDL = callPackage ./platform/libIDL {
-    gettext = if stdenv.isDarwin then pkgs.gettext else null;
+    gettext = if stdenv.hostPlatform.isDarwin then pkgs.gettext else null;
   };
 
   ORBit2 = callPackage ./platform/ORBit2 { };
diff --git a/pkgs/desktops/gnome-2/desktop/gtksourceview/default.nix b/pkgs/desktops/gnome-2/desktop/gtksourceview/default.nix
index 902178d16706..94c3d49a97e0 100644
--- a/pkgs/desktops/gnome-2/desktop/gtksourceview/default.nix
+++ b/pkgs/desktops/gnome-2/desktop/gtksourceview/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
     sha256 = "c585773743b1df8a04b1be7f7d90eecdf22681490d6810be54c81a7ae152191e";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       name = "change-igemacintegration-to-gtkosxapplication.patch";
       url = "https://gitlab.gnome.org/GNOME/gtksourceview/commit/e88357c5f210a8796104505c090fb6a04c213902.patch";
@@ -28,16 +28,16 @@ stdenv.mkDerivation (finalAttrs: {
     })
   ];
 
-  nativeBuildInputs = [ pkg-config intltool ] ++ lib.optionals stdenv.isDarwin [ autoreconfHook ];
+  nativeBuildInputs = [ pkg-config intltool ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ autoreconfHook ];
   buildInputs = [
     atk cairo glib gtk2
     pango libxml2Python perl
     gettext
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gnome-common gtk-mac-integration-gtk2
   ];
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     intltoolize --force
   '';
 
diff --git a/pkgs/desktops/gnome-2/platform/GConf/default.nix b/pkgs/desktops/gnome-2/platform/GConf/default.nix
index 33430f453ab5..ea6730f88e2e 100644
--- a/pkgs/desktops/gnome-2/platform/GConf/default.nix
+++ b/pkgs/desktops/gnome-2/platform/GConf/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ ORBit2 libxml2 ]
     # polkit requires pam, which requires shadow.h, which is not available on
     # darwin
-    ++ lib.optional (!stdenv.isDarwin) polkit;
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) polkit;
 
   propagatedBuildInputs = [ glib dbus-glib ];
 
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   configureFlags =
     # fixes the "libgconfbackend-oldxml.so is not portable" error on darwin
-    lib.optionals stdenv.isDarwin [ "--enable-static" ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ "--enable-static" ];
 
   postPatch = ''
     2to3 --write --nobackup gsettings/gsettings-schema-convert
diff --git a/pkgs/desktops/gnustep/libobjc2/default.nix b/pkgs/desktops/gnustep/libobjc2/default.nix
index ce83250fe678..ccbbdec13ac0 100644
--- a/pkgs/desktops/gnustep/libobjc2/default.nix
+++ b/pkgs/desktops/gnustep/libobjc2/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [ "-DCMAKE_INSTALL_LIBDIR=lib" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Objective-C runtime for use with GNUstep";
     homepage = "https://gnustep.github.io/";
     license = licenses.mit;
diff --git a/pkgs/desktops/lxqt/compton-conf/default.nix b/pkgs/desktops/lxqt/compton-conf/default.nix
index be6d593b4177..2403975b481b 100644
--- a/pkgs/desktops/lxqt/compton-conf/default.nix
+++ b/pkgs/desktops/lxqt/compton-conf/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   passthru.updateScript = gitUpdater { };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/lxqt/compton-conf";
     description = "GUI configuration tool for compton X composite manager";
     mainProgram = "compton-conf";
diff --git a/pkgs/desktops/lxqt/libdbusmenu-lxqt/default.nix b/pkgs/desktops/lxqt/libdbusmenu-lxqt/default.nix
index 9a49c10a1be9..62504bb33b54 100644
--- a/pkgs/desktops/lxqt/libdbusmenu-lxqt/default.nix
+++ b/pkgs/desktops/lxqt/libdbusmenu-lxqt/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   passthru.updateScript = gitUpdater { };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Qt implementation of the DBusMenu protocol";
     homepage = "https://github.com/lxqt/libdbusmenu-lxqt";
     license = licenses.lgpl21Plus;
diff --git a/pkgs/desktops/lxqt/libsysstat/default.nix b/pkgs/desktops/lxqt/libsysstat/default.nix
index 6f809629eaaa..daaad022edf5 100644
--- a/pkgs/desktops/lxqt/libsysstat/default.nix
+++ b/pkgs/desktops/lxqt/libsysstat/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   passthru.updateScript = gitUpdater { };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Library used to query system info and statistics";
     homepage = "https://github.com/lxqt/libsysstat";
     license = licenses.lgpl21Plus;
diff --git a/pkgs/desktops/lxqt/qtermwidget/default.nix b/pkgs/desktops/lxqt/qtermwidget/default.nix
index 51b9cef886ae..30fe20ebeefe 100644
--- a/pkgs/desktops/lxqt/qtermwidget/default.nix
+++ b/pkgs/desktops/lxqt/qtermwidget/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   passthru.updateScript = gitUpdater { };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/lxqt/qtermwidget";
     description = "Terminal emulator widget for Qt, used by QTerminal";
     license = licenses.gpl2Plus;
diff --git a/pkgs/desktops/mate/libmatemixer/default.nix b/pkgs/desktops/mate/libmatemixer/default.nix
index ebdd3eb07dda..25b99584429f 100644
--- a/pkgs/desktops/mate/libmatemixer/default.nix
+++ b/pkgs/desktops/mate/libmatemixer/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , gettext
 , glib
-, alsaSupport ? stdenv.isLinux
+, alsaSupport ? stdenv.hostPlatform.isLinux
 , alsa-lib
 , udev
 , pulseaudioSupport ? config.pulseaudio or true
diff --git a/pkgs/desktops/mate/mate-menus/default.nix b/pkgs/desktops/mate/mate-menus/default.nix
index 9328147e642c..31854538fb5e 100644
--- a/pkgs/desktops/mate/mate-menus/default.nix
+++ b/pkgs/desktops/mate/mate-menus/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   passthru.updateScript = mateUpdateScript { inherit pname; };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Menu system for MATE";
     homepage = "https://github.com/mate-desktop/mate-menus";
     license = with licenses; [ gpl2Plus lgpl2Plus ];
diff --git a/pkgs/development/ada-modules/gnatcoll/bindings.nix b/pkgs/development/ada-modules/gnatcoll/bindings.nix
index 0b7efb60deb9..32d490c1e1ba 100644
--- a/pkgs/development/ada-modules/gnatcoll/bindings.nix
+++ b/pkgs/development/ada-modules/gnatcoll/bindings.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     python3
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
 
diff --git a/pkgs/development/ada-modules/gprbuild/default.nix b/pkgs/development/ada-modules/gprbuild/default.nix
index f1cf28f00af3..3965789d742e 100644
--- a/pkgs/development/ada-modules/gprbuild/default.nix
+++ b/pkgs/development/ada-modules/gprbuild/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation {
     "LIBRARY_TYPE=relocatable"
   ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Ensure that there is enough space for the `fixDarwinDylibNames` hook to
     # update the install names of the output dylibs.
     NIX_LDFLAGS = "-headerpad_max_install_names";
diff --git a/pkgs/development/beam-modules/erlang-ls/default.nix b/pkgs/development/beam-modules/erlang-ls/default.nix
index a2ea7c8bd449..e3a189adf220 100644
--- a/pkgs/development/beam-modules/erlang-ls/default.nix
+++ b/pkgs/development/beam-modules/erlang-ls/default.nix
@@ -45,7 +45,7 @@ rebar3Relx {
     HOME=. rebar3 proper --constraint_tries 100
   '';
   # tests seem to be a bit flaky on darwin, skip them for now
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   installFlags = [ "PREFIX=$(out)" ];
   meta = with lib; {
     homepage = "https://github.com/erlang-ls/erlang_ls";
diff --git a/pkgs/development/compilers/bfc/default.nix b/pkgs/development/compilers/bfc/default.nix
index 83710df4c13b..660f130225c8 100644
--- a/pkgs/development/compilers/bfc/default.nix
+++ b/pkgs/development/compilers/bfc/default.nix
@@ -38,6 +38,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://bfc.wilfred.me.uk";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ figsoda ];
-    broken = stdenv.isAarch64 && stdenv.isLinux;
+    broken = stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux;
   };
 }
diff --git a/pkgs/development/compilers/bigloo/default.nix b/pkgs/development/compilers/bigloo/default.nix
index 9bf22ba6dcf2..b52d3fa6a31c 100644
--- a/pkgs/development/compilers/bigloo/default.nix
+++ b/pkgs/development/compilers/bigloo/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoconf automake libtool ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.ApplicationServices
     libunistring
   ];
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   preConfigure =
     # For libuv on darwin
-    lib.optionalString stdenv.isDarwin ''
+    lib.optionalString stdenv.hostPlatform.isDarwin ''
       export LIBTOOLIZE=libtoolize
     '' +
     # Help libgc's configure.
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
   checkTarget = "test";
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in "$out"/bin/*; do
       if isELF "$f"; then
         patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$f"
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     license     = lib.licenses.gpl2Plus;
     platforms   = lib.platforms.unix;
     maintainers = with lib.maintainers; [ thoughtpolice ];
-    broken      = stdenv.isDarwin && stdenv.isAarch64; # segfault during build
+    broken      = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64; # segfault during build
 
     longDescription = ''
       Bigloo is a Scheme implementation devoted to one goal: enabling
diff --git a/pkgs/development/compilers/binaryen/default.nix b/pkgs/development/compilers/binaryen/default.nix
index d6c1442a8b8b..7d78c1d65972 100644
--- a/pkgs/development/compilers/binaryen/default.nix
+++ b/pkgs/development/compilers/binaryen/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     # "binaryenjs" "binaryenjs_wasm" # not building this
     "lit" "gtest"
   ];
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   meta = with lib; {
     homepage = "https://github.com/WebAssembly/binaryen";
diff --git a/pkgs/development/compilers/blueprint/default.nix b/pkgs/development/compilers/blueprint/default.nix
index 5c1aa1b2a2cd..95903e2e76d1 100644
--- a/pkgs/development/compilers/blueprint/default.nix
+++ b/pkgs/development/compilers/blueprint/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # requires xvfb-run
-  doCheck = !stdenv.isDarwin
+  doCheck = !stdenv.hostPlatform.isDarwin
   && false;  # tests time out
 
   checkPhase = ''
diff --git a/pkgs/development/compilers/c0/default.nix b/pkgs/development/compilers/c0/default.nix
index 4c3f5ba201de..8dbb1627db3a 100644
--- a/pkgs/development/compilers/c0/default.nix
+++ b/pkgs/development/compilers/c0/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
       --replace '`../get_version.sh`' '${version}' \
       --replace '`date`' '1970-01-01T00:00:00Z' \
       --replace '`hostname`' 'nixpkgs'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in cc0/compiler/bin/coin-o0-support cc0/compiler/bin/cc0-o0-support; do
       substituteInPlace $f --replace '$(brew --prefix gnu-getopt)' '${getopt}'
     done
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     getopt
     mlton
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.sigtool ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.sigtool ];
 
   buildInputs = [
     boehmgc
@@ -80,6 +80,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     # line 1: ../../bin/wrappergen: cannot execute: required file not found
     # make[2]: *** [../../lib.mk:83:
-    broken = stdenv.isLinux;
+    broken = stdenv.hostPlatform.isLinux;
   };
 }
diff --git a/pkgs/development/compilers/c3c/default.nix b/pkgs/development/compilers/c3c/default.nix
index 01cc7fa28ce3..9058e1af264b 100644
--- a/pkgs/development/compilers/c3c/default.nix
+++ b/pkgs/development/compilers/c3c/default.nix
@@ -35,7 +35,7 @@ llvmPackages.stdenv.mkDerivation (finalAttrs: {
     curl
     libxml2
     libffi
-  ] ++ lib.optionals llvmPackages.stdenv.isDarwin [ xar ];
+  ] ++ lib.optionals llvmPackages.stdenv.hostPlatform.isDarwin [ xar ];
 
   nativeCheckInputs = [ python3 ];
 
diff --git a/pkgs/development/compilers/cakelisp/default.nix b/pkgs/development/compilers/cakelisp/default.nix
index c52c93c5e6c7..48e3e9efa5fb 100644
--- a/pkgs/development/compilers/cakelisp/default.nix
+++ b/pkgs/development/compilers/cakelisp/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
         --replace '"/usr/bin/g++"' '"${gcc}/bin/g++"'
     substituteInPlace src/ModuleManager.cpp \
         --replace '"/usr/bin/g++"' '"${gcc}/bin/g++"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Build.sh --replace '--export-dynamic' '-export_dynamic'
     substituteInPlace runtime/HotReloading.cake --replace '--export-dynamic' '-export_dynamic'
     substituteInPlace Bootstrap.cake --replace '--export-dynamic' '-export_dynamic'
@@ -50,6 +50,6 @@ stdenv.mkDerivation {
     platforms = platforms.darwin ++ platforms.linux;
     maintainers = [ maintainers.sbond75 ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/compilers/ccl/default.nix b/pkgs/development/compilers/ccl/default.nix
index 9fe1a8aa8e56..ae82b0ccfda2 100644
--- a/pkgs/development/compilers/ccl/default.nix
+++ b/pkgs/development/compilers/ccl/default.nix
@@ -40,12 +40,12 @@ in stdenv.mkDerivation rec {
     sha256 = cfg.sha256;
   };
 
-  buildInputs = if stdenv.isDarwin then [ bootstrap_cmds m4 ] else [ glibc m4 ];
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ bootstrap_cmds m4 ] else [ glibc m4 ];
 
   CCL_RUNTIME = cfg.runtime;
   CCL_KERNEL = cfg.kernel;
 
-  postPatch = if stdenv.isDarwin then ''
+  postPatch = if stdenv.hostPlatform.isDarwin then ''
     substituteInPlace lisp-kernel/${CCL_KERNEL}/Makefile \
       --replace "M4 = gm4"   "M4 = m4" \
       --replace "dtrace"     "/usr/sbin/dtrace" \
@@ -88,7 +88,7 @@ in stdenv.mkDerivation rec {
     maintainers = lib.teams.lisp.members;
     platforms   = attrNames options;
     # assembler failures during build, x86_64-darwin broken since 2020-10-14
-    broken      = (stdenv.isDarwin && stdenv.isx86_64);
+    broken      = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64);
     license     = licenses.asl20;
   };
 }
diff --git a/pkgs/development/compilers/chez-racket/shared.nix b/pkgs/development/compilers/chez-racket/shared.nix
index b9368dd4ebea..e9a9e42346d6 100644
--- a/pkgs/development/compilers/chez-racket/shared.nix
+++ b/pkgs/development/compilers/chez-racket/shared.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (args // {
     export LZ4="$(find ${lz4.out}/lib -type f | sort | head -n1)"
   '';
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin ([ cctools darwin.autoSignDarwinBinariesHook ]);
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin ([ cctools darwin.autoSignDarwinBinariesHook ]);
   buildInputs = [ libiconv libX11 lz4 ncurses zlib ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/compilers/chez/default.nix b/pkgs/development/compilers/chez/default.nix
index 9002db42abc2..de998e550b41 100644
--- a/pkgs/development/compilers/chez/default.nix
+++ b/pkgs/development/compilers/chez/default.nix
@@ -13,9 +13,9 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-03GZASte0ZhcQGnWqH/xjl4fWi3yfkApkfr0XcTyIyw=";
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     darwin.autoSignDarwinBinariesHook
   ];
   buildInputs = [ ncurses libiconv libX11 libuuid ];
diff --git a/pkgs/development/compilers/chicken/4/chicken.nix b/pkgs/development/compilers/chicken/4/chicken.nix
index b96a1d459d71..a36ef4569e30 100644
--- a/pkgs/development/compilers/chicken/4/chicken.nix
+++ b/pkgs/development/compilers/chicken/4/chicken.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
     sha256 = "0hvckhi5gfny3mlva6d7y9pmx7cbwvq0r7mk11k3sdiik9hlkmdd";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # There is not enough space in the load command to accomodate a full path to the store,
     # so use `@executable_path` to specify a relative path to chicken’s lib folder.
     sed -e '/POSTINSTALL_PROGRAM_FLAGS = /{s|$(LIBDIR)|@executable_path/../lib|}' \
@@ -30,12 +30,12 @@ stdenv.mkDerivation {
   setupHook = lib.optional (bootstrap-chicken != null) ./setup-hook.sh;
 
   # -fno-strict-overflow is not a supported argument in clang on darwin
-  hardeningDisable = lib.optionals stdenv.isDarwin ["strictoverflow"];
+  hardeningDisable = lib.optionals stdenv.hostPlatform.isDarwin ["strictoverflow"];
 
   makeFlags = [
     "PLATFORM=${platform}" "PREFIX=$(out)"
     "VARDIR=$(out)/var/lib"
-  ] ++ (lib.optionals stdenv.isDarwin [
+  ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [
     "XCODE_TOOL_PATH=${darwin.binutils.bintools}/bin"
     "C_COMPILER=$(CC)"
     "POSTINSTALL_PROGRAM=${stdenv.cc.targetPrefix}install_name_tool"
@@ -49,7 +49,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     darwin.autoSignDarwinBinariesHook
   ];
 
diff --git a/pkgs/development/compilers/chicken/5/chicken.nix b/pkgs/development/compilers/chicken/5/chicken.nix
index 2f0b8316ae8b..53b4cc9024d5 100644
--- a/pkgs/development/compilers/chicken/5/chicken.nix
+++ b/pkgs/development/compilers/chicken/5/chicken.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
     "PREFIX=$(out)"
     "C_COMPILER=$(CC)"
     "CXX_COMPILER=$(CXX)"
-  ] ++ (lib.optionals stdenv.isDarwin [
+  ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [
     "XCODE_TOOL_PATH=${darwin.binutils.bintools}/bin"
     "LINKER_OPTIONS=-headerpad_max_install_names"
     "POSTINSTALL_PROGRAM=install_name_tool"
@@ -47,7 +47,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     darwin.autoSignDarwinBinariesHook
   ];
 
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
     bootstrap-chicken
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   postCheck = ''
     ./csi -R chicken.pathname -R chicken.platform \
        -p "(assert (equal? \"${toString finalAttrs.binaryVersion}\" (pathname-file (car (repository-path)))))"
diff --git a/pkgs/development/compilers/chicken/5/overrides.nix b/pkgs/development/compilers/chicken/5/overrides.nix
index b132036bbae4..0aaf24b86ea1 100644
--- a/pkgs/development/compilers/chicken/5/overrides.nix
+++ b/pkgs/development/compilers/chicken/5/overrides.nix
@@ -19,7 +19,7 @@ let
   addToPropagatedBuildInputsWithPkgConfig = pkg: old:
     (addPkgConfig old) // (addToPropagatedBuildInputs pkg old);
   broken = addMetaAttrs { broken = true; };
-  brokenOnDarwin = addMetaAttrs { broken = stdenv.isDarwin; };
+  brokenOnDarwin = addMetaAttrs { broken = stdenv.hostPlatform.isDarwin; };
   addToCscOptions = opt: old: {
     CSC_OPTIONS = lib.concatStringsSep " " ([ old.CSC_OPTIONS or "" ] ++ lib.toList opt);
   };
@@ -27,8 +27,8 @@ in
 {
   allegro = old:
     ((addToBuildInputsWithPkgConfig ([ pkgs.allegro5 pkgs.libglvnd pkgs.libGLU ]
-    ++ lib.optionals stdenv.isDarwin [ pkgs.darwin.apple_sdk.frameworks.OpenGL ]
-    ++ lib.optionals stdenv.isLinux [ pkgs.xorg.libX11 ])) old) // {
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.darwin.apple_sdk.frameworks.OpenGL ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pkgs.xorg.libX11 ])) old) // {
       # depends on 'chicken' egg, which doesn't exist,
       # so we specify all the deps here
       propagatedBuildInputs = [
@@ -72,12 +72,12 @@ in
   gl-utils = addPkgConfig;
   glfw3 = addToBuildInputsWithPkgConfig pkgs.glfw3;
   glls = addPkgConfig;
-  iconv = addToBuildInputs (lib.optional stdenv.isDarwin pkgs.libiconv);
+  iconv = addToBuildInputs (lib.optional stdenv.hostPlatform.isDarwin pkgs.libiconv);
   icu = addToBuildInputsWithPkgConfig pkgs.icu;
   imlib2 = addToBuildInputsWithPkgConfig pkgs.imlib2;
   inotify = old:
-    (addToBuildInputs (lib.optional stdenv.isDarwin pkgs.libinotify-kqueue) old)
-    // lib.optionalAttrs stdenv.isDarwin (addToCscOptions "-L -linotify" old);
+    (addToBuildInputs (lib.optional stdenv.hostPlatform.isDarwin pkgs.libinotify-kqueue) old)
+    // lib.optionalAttrs stdenv.hostPlatform.isDarwin (addToCscOptions "-L -linotify" old);
   leveldb = addToBuildInputs pkgs.leveldb;
   magic = addToBuildInputs pkgs.file;
   mdh = old:
@@ -94,7 +94,7 @@ in
   nanomsg = addToBuildInputs pkgs.nanomsg;
   ncurses = addToBuildInputsWithPkgConfig [ pkgs.ncurses ];
   opencl = addToBuildInputs ([ pkgs.opencl-headers pkgs.ocl-icd ]
-    ++ lib.optionals stdenv.isDarwin [ pkgs.darwin.apple_sdk.frameworks.OpenCL ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.darwin.apple_sdk.frameworks.OpenCL ]);
   openssl = addToBuildInputs pkgs.openssl;
   plot = addToBuildInputs pkgs.plotutils;
   postgresql = addToBuildInputsWithPkgConfig pkgs.postgresql;
@@ -154,8 +154,8 @@ in
   };
   opengl = old:
     (addToBuildInputsWithPkgConfig
-      (lib.optionals (!stdenv.isDarwin) [ pkgs.libGL pkgs.libGLU ]
-      ++ lib.optionals stdenv.isDarwin [ pkgs.darwin.apple_sdk.frameworks.Foundation pkgs.darwin.apple_sdk.frameworks.OpenGL ])
+      (lib.optionals (!stdenv.hostPlatform.isDarwin) [ pkgs.libGL pkgs.libGLU ]
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.darwin.apple_sdk.frameworks.Foundation pkgs.darwin.apple_sdk.frameworks.OpenGL ])
       old)
     // {
       postPatch = ''
@@ -164,7 +164,7 @@ in
       '';
     };
   posix-shm = old: {
-    postPatch = lib.optionalString stdenv.isDarwin ''
+    postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace build.scm \
         --replace "-lrt" ""
     '';
diff --git a/pkgs/development/compilers/ciao/default.nix b/pkgs/development/compilers/ciao/default.nix
index 29e103226022..c68b5fe06547 100644
--- a/pkgs/development/compilers/ciao/default.nix
+++ b/pkgs/development/compilers/ciao/default.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl21;
     maintainers = with maintainers; [ suhr ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/ciao.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/ciao.x86_64-darwin
   };
 }
diff --git a/pkgs/development/compilers/circt/circt-llvm.nix b/pkgs/development/compilers/circt/circt-llvm.nix
index 0043702fd847..8375ccc22f8f 100644
--- a/pkgs/development/compilers/circt/circt-llvm.nix
+++ b/pkgs/development/compilers/circt/circt-llvm.nix
@@ -34,7 +34,7 @@
 
   # Get rid of ${extra_libdir} (which ends up containing a path to circt-llvm.dev
   # in circt) so that we only have to remove the one fixed rpath.
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace llvm/llvm/cmake/modules/AddLLVM.cmake \
       --replace-fail 'set(_install_rpath "@loader_path/../lib''${LLVM_LIBDIR_SUFFIX}" ''${extra_libdir})' \
         'set(_install_rpath "@loader_path/../lib''${LLVM_LIBDIR_SUFFIX}")'
@@ -69,7 +69,7 @@
   # it hasn't been populated yet.
   #
   # Inspired by fixDarwinDylibNames.
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     local flags=(-delete_rpath @loader_path/../lib)
     for file in "$lib"/lib/*.dylib; do
       flags+=(-change @rpath/"$(basename "$file")" "$file")
diff --git a/pkgs/development/compilers/clasp/default.nix b/pkgs/development/compilers/clasp/default.nix
index d5d56546b576..4613357ded3b 100644
--- a/pkgs/development/compilers/clasp/default.nix
+++ b/pkgs/development/compilers/clasp/default.nix
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
     platforms = ["x86_64-linux" "x86_64-darwin"];
     # Upstream claims support, but breaks with:
     # error: use of undeclared identifier 'aligned_alloc'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/clasp-developers/clasp";
     mainProgram = "clasp";
   };
diff --git a/pkgs/development/compilers/cmdstan/default.nix b/pkgs/development/compilers/cmdstan/default.nix
index a6b6833289b7..5199d457f4df 100644
--- a/pkgs/development/compilers/cmdstan/default.nix
+++ b/pkgs/development/compilers/cmdstan/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [
     "build"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "arch=${stdenv.hostPlatform.darwinArch}"
   ];
 
diff --git a/pkgs/development/compilers/codon/default.nix b/pkgs/development/compilers/codon/default.nix
index 520c6386490b..88d3c01d713a 100644
--- a/pkgs/development/compilers/codon/default.nix
+++ b/pkgs/development/compilers/codon/default.nix
@@ -125,7 +125,7 @@ stdenv.mkDerivation {
     "-DLLVM_USE_LINKER=lld"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/lib/codon/*.dylib $out/lib/
   '';
 
diff --git a/pkgs/development/compilers/corretto/mk-corretto.nix b/pkgs/development/compilers/corretto/mk-corretto.nix
index 1059935ce20f..37ac9006515d 100644
--- a/pkgs/development/compilers/corretto/mk-corretto.nix
+++ b/pkgs/development/compilers/corretto/mk-corretto.nix
@@ -53,7 +53,7 @@ jdk.overrideAttrs (finalAttrs: oldAttrs: {
   # The Linux installer is placed at linux/universal/tar whereas the MacOS
   # one is at mac/tar.
   gradleBuildTask =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       ":installers:mac:tar:build"
     else ":installers:linux:universal:tar:packageBuildResults";
 
diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index c95298cbfe2a..0907c1c4d68d 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -144,7 +144,7 @@ let
         substituteInPlace spec/std/socket/udp_socket_spec.cr \
           --replace 'it "joins and transmits to multicast groups"' 'pending "joins and transmits to multicast groups"'
 
-      '' + lib.optionalString (stdenv.isDarwin && lib.versionAtLeast version "1.3.0" && lib.versionOlder version "1.7.0") ''
+      '' + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionAtLeast version "1.3.0" && lib.versionOlder version "1.7.0") ''
         # See https://github.com/NixOS/nixpkgs/pull/195606#issuecomment-1356491277
         substituteInPlace spec/compiler/loader/unix_spec.cr \
           --replace 'it "parses file paths"' 'pending "parses file paths"'
@@ -175,7 +175,7 @@ let
         libxml2
         openssl
       ] ++ extraBuildInputs
-      ++ lib.optionals stdenv.isDarwin [ libiconv ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
       makeFlags = [
         "CRYSTAL_CONFIG_VERSION=${version}"
diff --git a/pkgs/development/compilers/dart/default.nix b/pkgs/development/compilers/dart/default.nix
index 9a08b3d51732..d6d538d5c844 100644
--- a/pkgs/development/compilers/dart/default.nix
+++ b/pkgs/development/compilers/dart/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
     mkdir -p $out
     cp -R * $out/
     echo $libPath
-  '' + lib.optionalString (stdenv.isLinux) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isLinux) ''
     find $out/bin -executable -type f -exec patchelf --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) {} \;
   '';
 
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
 
       testCompile = runCommand "dart-test-compile" {
         nativeBuildInputs = [ finalAttrs.finalPackage ]
-          ++ lib.optionals stdenv.isDarwin [ cctools darwin.sigtool ];
+          ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools darwin.sigtool ];
       } ''
         HELLO_MESSAGE="Hello, world!"
         echo "void main() => print('$HELLO_MESSAGE');" > hello.dart
diff --git a/pkgs/development/compilers/dictu/default.nix b/pkgs/development/compilers/dictu/default.nix
index b58d86871374..fedf3deed62c 100644
--- a/pkgs/development/compilers/dictu/default.nix
+++ b/pkgs/development/compilers/dictu/default.nix
@@ -84,6 +84,6 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ luc65r ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dictu.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dictu.x86_64-darwin
   };
 }
diff --git a/pkgs/development/compilers/dotnet/build-dotnet.nix b/pkgs/development/compilers/dotnet/build-dotnet.nix
index 0c9de3f05cab..bba31fe394ca 100644
--- a/pkgs/development/compilers/dotnet/build-dotnet.nix
+++ b/pkgs/development/compilers/dotnet/build-dotnet.nix
@@ -61,7 +61,7 @@ let
       <ItemGroup>
         <CustomLinkerArg Include="-Wl,-rpath,'${lib.makeLibraryPath [ icu zlib openssl ]}'" />
       </ItemGroup>
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       <Import Project="${signAppHost}" />
   '' + ''
     </Project>
@@ -74,8 +74,8 @@ mkCommon type rec {
   # Some of these dependencies are `dlopen()`ed.
   nativeBuildInputs = [
     makeWrapper
-  ] ++ lib.optional stdenv.isLinux autoPatchelfHook
-  ++ lib.optionals (type == "sdk" && stdenv.isDarwin) [
+  ] ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook
+  ++ lib.optionals (type == "sdk" && stdenv.hostPlatform.isDarwin) [
     xmlstarlet
     sigtool
   ];
@@ -87,7 +87,7 @@ mkCommon type rec {
     libkrb5
     curl
     xmlstarlet
-  ] ++ lib.optional stdenv.isLinux lttng-ust_2_12;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux lttng-ust_2_12;
 
   src = fetchurl (
     srcs."${stdenv.hostPlatform.system}" or (throw
@@ -102,7 +102,7 @@ mkCommon type rec {
       -s //_:Project -t elem -n Import \
       -i \$prev -t attr -n Project -v "${extraTargets}" \
       sdk/*/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     codesign --remove-signature packs/Microsoft.NETCore.App.Host.osx-*/*/runtimes/osx-*/native/{apphost,singlefilehost}
   '') else null;
 
@@ -144,7 +144,7 @@ mkCommon type rec {
   '';
 
   # fixes: Could not load ICU data. UErrorCode: 2
-  propagatedSandboxProfile = lib.optionalString stdenv.isDarwin ''
+  propagatedSandboxProfile = lib.optionalString stdenv.hostPlatform.isDarwin ''
     (allow file-read* (subpath "/usr/share/icu"))
     (allow file-read* (subpath "/private/var/db/mds/system"))
     (allow mach-lookup (global-name "com.apple.SecurityServer")
diff --git a/pkgs/development/compilers/dotnet/common.nix b/pkgs/development/compilers/dotnet/common.nix
index 9fcd79c752d1..b4891a83e41f 100644
--- a/pkgs/development/compilers/dotnet/common.nix
+++ b/pkgs/development/compilers/dotnet/common.nix
@@ -90,7 +90,7 @@
               src = built;
               nativeBuildInputs = [ built ] ++ runInputs;
               passthru = { inherit built; };
-            } // lib.optionalAttrs (stdenv.isDarwin && runAllowNetworking) {
+            } // lib.optionalAttrs (stdenv.hostPlatform.isDarwin && runAllowNetworking) {
               sandboxProfile = ''
                 (allow network-inbound (local ip))
                 (allow mach-lookup (global-name "com.apple.FSEvents"))
@@ -180,12 +180,12 @@
     } // lib.optionalAttrs finalAttrs.finalPackage.hasILCompiler {
       aot = mkDotnetTest {
         name = "aot";
-        stdenv = if stdenv.isDarwin then swiftPackages.stdenv else stdenv;
+        stdenv = if stdenv.hostPlatform.isDarwin then swiftPackages.stdenv else stdenv;
         template = "console";
         usePackageSource = true;
         buildInputs =
           [ zlib
-          ] ++ lib.optional stdenv.isDarwin (with darwin; with apple_sdk.frameworks; [
+          ] ++ lib.optional stdenv.hostPlatform.isDarwin (with darwin; with apple_sdk.frameworks; [
             swiftPackages.swift
             Foundation
             CryptoKit
diff --git a/pkgs/development/compilers/dotnet/patch-nupkgs.nix b/pkgs/development/compilers/dotnet/patch-nupkgs.nix
index c351ea7b32ef..528b236239e4 100644
--- a/pkgs/development/compilers/dotnet/patch-nupkgs.nix
+++ b/pkgs/development/compilers/dotnet/patch-nupkgs.nix
@@ -20,7 +20,7 @@ let
     libunwind
     libuuid
     openssl
-  ] ++ lib.optional stdenv.isLinux lttng-ust_2_12);
+  ] ++ lib.optional stdenv.hostPlatform.isLinux lttng-ust_2_12);
 
 in writeShellScriptBin "patch-nupkgs" (''
   set -euo pipefail
@@ -35,7 +35,7 @@ in writeShellScriptBin "patch-nupkgs" (''
       if [ "$magic" = $'\177ELF' ]; then return 0; else return 1; fi
   }
   cd "$1"
-'' + lib.optionalString stdenv.isLinux ''
+'' + lib.optionalString stdenv.hostPlatform.isLinux ''
   for x in */* */*; do
     # .nupkg.metadata is written last, so we know the packages is complete
     [[ -d "$x" ]] && [[ -f "$x"/.nupkg.metadata ]] \
@@ -68,7 +68,7 @@ in writeShellScriptBin "patch-nupkgs" (''
     done
     touch "$x"/.nix-patched
   done
-'' + lib.optionalString stdenv.isDarwin ''
+'' + lib.optionalString stdenv.hostPlatform.isDarwin ''
   for x in microsoft.dotnet.ilcompiler/*; do
     # .nupkg.metadata is written last, so we know the packages is complete
     [[ -d "$x" ]] && [[ -f "$x"/.nupkg.metadata ]] \
diff --git a/pkgs/development/compilers/dotnet/vmr.nix b/pkgs/development/compilers/dotnet/vmr.nix
index d6cfcd9035d9..41b0eac15734 100644
--- a/pkgs/development/compilers/dotnet/vmr.nix
+++ b/pkgs/development/compilers/dotnet/vmr.nix
@@ -32,7 +32,7 @@
 }:
 
 let
-  stdenv = if clangStdenv.isDarwin
+  stdenv = if clangStdenv.hostPlatform.isDarwin
     then swiftPackages.stdenv
     else clangStdenv;
 
@@ -59,7 +59,7 @@ in stdenv.mkDerivation rec {
   version = release;
 
   # TODO: fix this in the binary sdk packages
-  preHook = lib.optionalString stdenv.isDarwin ''
+  preHook = lib.optionalString stdenv.hostPlatform.isDarwin ''
     addToSearchPath DYLD_LIBRARY_PATH "${_icu}/lib"
     export DYLD_LIBRARY_PATH
   '';
diff --git a/pkgs/development/compilers/dtc/default.nix b/pkgs/development/compilers/dtc/default.nix
index d244fc62aef4..5fbf929d5e52 100644
--- a/pkgs/development/compilers/dtc/default.nix
+++ b/pkgs/development/compilers/dtc/default.nix
@@ -108,7 +108,7 @@ stdenv.mkDerivation (finalAttrs: {
   doCheck =
     # Checks are broken on aarch64 darwin
     # https://github.com/NixOS/nixpkgs/pull/118700#issuecomment-885892436
-    !stdenv.isDarwin &&
+    !stdenv.hostPlatform.isDarwin &&
     # Checks are broken when building statically on x86_64 linux with musl
     # One of the test tries to build a shared library and this causes the linker:
     # x86_64-unknown-linux-musl-ld: /nix/store/h9gcvnp90mpniyx2v0d0p3s06hkx1v2p-x86_64-unknown-linux-musl-gcc-13.3.0/lib/gcc/x86_64-unknown-linux-musl/13.3.0/crtbeginT.o: relocation R_X86_64_32 against hidden symbol `__TMC_END__' can not be used when making a shared object
diff --git a/pkgs/development/compilers/ecl/16.1.2.nix b/pkgs/development/compilers/ecl/16.1.2.nix
index 75055130ada2..121935df5f05 100644
--- a/pkgs/development/compilers/ecl/16.1.2.nix
+++ b/pkgs/development/compilers/ecl/16.1.2.nix
@@ -94,6 +94,6 @@ stdenv.mkDerivation rec {
     maintainers = lib.teams.lisp.members;
     platforms = platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/compilers/elm/packages/elm-json/default.nix b/pkgs/development/compilers/elm/packages/elm-json/default.nix
index efb3fbfcc5cd..bc456d2479c1 100644
--- a/pkgs/development/compilers/elm/packages/elm-json/default.nix
+++ b/pkgs/development/compilers/elm/packages/elm-json/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     curl
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   cargoHash = "sha256-8SOpL8nfhYen9vza0LYpB/5fgVmBwG7vGMmFOaJskIc=";
 
diff --git a/pkgs/development/compilers/elm/packages/elm-test-rs/default.nix b/pkgs/development/compilers/elm/packages/elm-test-rs/default.nix
index a457a422cf85..5ff6d4117b10 100644
--- a/pkgs/development/compilers/elm/packages/elm-test-rs/default.nix
+++ b/pkgs/development/compilers/elm/packages/elm-test-rs/default.nix
@@ -19,8 +19,8 @@ rustPlatform.buildRustPackage rec {
   };
 
   buildInputs =
-    lib.optionals (!stdenv.isDarwin) [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (
+    lib.optionals (!stdenv.hostPlatform.isDarwin) [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
diff --git a/pkgs/development/compilers/elm/packages/lamdera/default.nix b/pkgs/development/compilers/elm/packages/lamdera/default.nix
index 79101092e788..eca3fcd48040 100644
--- a/pkgs/development/compilers/elm/packages/lamdera/default.nix
+++ b/pkgs/development/compilers/elm/packages/lamdera/default.nix
@@ -4,8 +4,8 @@
 }:
 
 let
-  os = if stdenv.isDarwin then "macos" else "linux";
-  arch = if stdenv.isAarch64 then "arm64" else "x86_64";
+  os = if stdenv.hostPlatform.isDarwin then "macos" else "linux";
+  arch = if stdenv.hostPlatform.isAarch64 then "arm64" else "x86_64";
   hashes =
     {
       "x86_64-linux" = "a51d5b9a011c54b0001ff3273cee027774686e233adadb20b1978d2cabfe32a6";
diff --git a/pkgs/development/compilers/elm/packages/node/node-composition.nix b/pkgs/development/compilers/elm/packages/node/node-composition.nix
index 1580d1f43fdd..0ab5a28046c2 100644
--- a/pkgs/development/compilers/elm/packages/node/node-composition.nix
+++ b/pkgs/development/compilers/elm/packages/node/node-composition.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../../../node-packages/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/pkgs/development/compilers/erg/default.nix b/pkgs/development/compilers/erg/default.nix
index 9276a311a581..06bcc8d14700 100644
--- a/pkgs/development/compilers/erg/default.nix
+++ b/pkgs/development/compilers/erg/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   env = {
     BUILD_DATE = "1970/01/01 00:00:00";
-    CASE_SENSITIVE = lib.boolToString (!stdenv.isDarwin);
+    CASE_SENSITIVE = lib.boolToString (!stdenv.hostPlatform.isDarwin);
     GIT_HASH_SHORT = src.rev;
   };
 
diff --git a/pkgs/development/compilers/fasm/bin.nix b/pkgs/development/compilers/fasm/bin.nix
index f23e9540928a..71e2146a7004 100644
--- a/pkgs/development/compilers/fasm/bin.nix
+++ b/pkgs/development/compilers/fasm/bin.nix
@@ -12,7 +12,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   installPhase = ''
     runHook preInstall
 
-    install -D fasm${lib.optionalString stdenvNoCC.isx86_64 ".x64"} $out/bin/fasm
+    install -D fasm${lib.optionalString stdenvNoCC.hostPlatform.isx86_64 ".x64"} $out/bin/fasm
 
     runHook postInstall
   '';
diff --git a/pkgs/development/compilers/flutter/engine/package.nix b/pkgs/development/compilers/flutter/engine/package.nix
index 443db6af3680..d9b20898886c 100644
--- a/pkgs/development/compilers/flutter/engine/package.nix
+++ b/pkgs/development/compilers/flutter/engine/package.nix
@@ -114,7 +114,7 @@ stdenv.mkDerivation (finalAttrs: {
 
     paths =
       expandDeps (
-        lib.optionals (stdenv.isLinux) [
+        lib.optionals (stdenv.hostPlatform.isLinux) [
           gtk3
           wayland
           libepoxy
@@ -139,7 +139,7 @@ stdenv.mkDerivation (finalAttrs: {
           xorg.xorgproto
           zlib
         ]
-        ++ lib.optionals (stdenv.isDarwin) [
+        ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
           clang
           llvm
         ]
@@ -161,7 +161,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-I${finalAttrs.toolchain}/include"
   ] ++ lib.optional (!isOptimized) "-U_FORTIFY_SOURCE";
 
-  nativeCheckInputs = lib.optionals stdenv.isLinux [
+  nativeCheckInputs = lib.optionals stdenv.hostPlatform.isLinux [
     xorg.xorgserver
     openbox
   ];
@@ -175,8 +175,8 @@ stdenv.mkDerivation (finalAttrs: {
       ninja
       dart
     ]
-    ++ lib.optionals (stdenv.isLinux) [ patchelf ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux) [ patchelf ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       darwin.system_cmds
       darwin.xcode
       tools.xcode-select
@@ -214,7 +214,7 @@ stdenv.mkDerivation (finalAttrs: {
     mkdir -p src/${dartPath}/tools/sdks
     ln -s ${dart} src/${dartPath}/tools/sdks/dart-sdk
 
-    ${lib.optionalString (stdenv.isLinux) ''
+    ${lib.optionalString (stdenv.hostPlatform.isLinux) ''
       for patchtool in ''${patchtools[@]}; do
         patchelf src/$patchtool --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker)
       done
@@ -269,7 +269,7 @@ stdenv.mkDerivation (finalAttrs: {
 
       export PYTHONPATH=$src/src/build
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       export PATH=${darwin.xcode}/Contents/Developer/usr/bin/:$PATH
     ''
     + ''
@@ -322,7 +322,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   meta = with lib; {
     # Very broken on Darwin
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "The Flutter engine";
     homepage = "https://flutter.dev";
     maintainers = with maintainers; [ RossComputerGuy ];
diff --git a/pkgs/development/compilers/flutter/flutter-tools.nix b/pkgs/development/compilers/flutter/flutter-tools.nix
index 306765cd0a42..1639d54a869e 100644
--- a/pkgs/development/compilers/flutter/flutter-tools.nix
+++ b/pkgs/development/compilers/flutter/flutter-tools.nix
@@ -28,7 +28,7 @@ buildDartApplication.override { inherit dart; } rec {
     popd
   ''
   # Use arm64 instead of arm64e.
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace lib/src/ios/xcodeproj.dart \
       --replace-fail arm64e arm64
   '';
diff --git a/pkgs/development/compilers/fpc/binary.nix b/pkgs/development/compilers/fpc/binary.nix
index e4c8a2358fc8..6f8acae7f916 100644
--- a/pkgs/development/compilers/fpc/binary.nix
+++ b/pkgs/development/compilers/fpc/binary.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
         url = "mirror://sourceforge/project/freepascal/Linux/${version}/fpc-${version}.aarch64-linux.tar";
         sha256 = "b39470f9b6b5b82f50fc8680a5da37d2834f2129c65c24c5628a80894d565451";
       }
-    else if stdenv.isDarwin then
+    else if stdenv.hostPlatform.isDarwin then
       fetchurl {
         url = "mirror://sourceforge/project/freepascal/Mac%20OS%20X/${version}/fpc-${version}.intelarm64-macosx.dmg";
         sha256 = "05d4510c8c887e3c68de20272abf62171aa5b2ef1eba6bce25e4c0bc41ba8b7d";
diff --git a/pkgs/development/compilers/fpc/default.nix b/pkgs/development/compilers/fpc/default.nix
index 3c9eb60d57c7..70f3b60efb8d 100644
--- a/pkgs/development/compilers/fpc/default.nix
+++ b/pkgs/development/compilers/fpc/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ startFPC gawk ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.CoreFoundation
     ];
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   # Patch paths for linux systems. Other platforms will need their own patches.
   patches = [
     ./mark-paths.patch # mark paths for later substitution in postPatch
-  ] ++ lib.optional stdenv.isAarch64 (fetchpatch {
+  ] ++ lib.optional stdenv.hostPlatform.isAarch64 (fetchpatch {
     # backport upstream patch for aarch64 glibc 2.34
     url = "https://gitlab.com/freepascal.org/fpc/source/-/commit/a20a7e3497bccf3415bf47ccc55f133eb9d6d6a0.patch";
     hash = "sha256-xKTBwuOxOwX9KCazQbBNLhMXCqkuJgIFvlXewHY63GM=";
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
   '';
 
   NIX_LDFLAGS = lib.optionalString
-    stdenv.isDarwin (with darwin.apple_sdk.frameworks; "-F${CoreFoundation}/Library/Frameworks");
+    stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; "-F${CoreFoundation}/Library/Frameworks");
 
   makeFlags = [ "NOGDB=1" "FPC=${startFPC}/bin/fpc" ];
 
diff --git a/pkgs/development/compilers/gambit/build.nix b/pkgs/development/compilers/gambit/build.nix
index 05d92d434faf..78c98fe50f21 100644
--- a/pkgs/development/compilers/gambit/build.nix
+++ b/pkgs/development/compilers/gambit/build.nix
@@ -78,9 +78,9 @@ gccStdenv.mkDerivation rec {
   ] ++ gambit-params.extraOptions
     # TODO: pick an appropriate architecture to optimize on on x86-64?
     # https://gcc.gnu.org/onlinedocs/gcc-4.8.4/gcc/i386-and-x86-64-Options.html#i386-and-x86-64-Options
-    # ++ lib.optional pkgs.stdenv.isx86_64 "--enable-march=core-avx2"
+    # ++ lib.optional pkgs.stdenv.hostPlatform.isx86_64 "--enable-march=core-avx2"
     # Do not enable poll on darwin due to https://github.com/gambit/gambit/issues/498
-    ++ lib.optional (!gccStdenv.isDarwin) "--enable-poll";
+    ++ lib.optional (!gccStdenv.hostPlatform.isDarwin) "--enable-poll";
 
   configurePhase = ''
     export CC=${gccStdenv.cc}/bin/${gccStdenv.cc.targetPrefix}gcc \
@@ -97,7 +97,7 @@ gccStdenv.mkDerivation rec {
 
     # OS-specific paths are hardcoded in ./configure
     substituteInPlace config.status \
-      ${lib.optionalString (gccStdenv.isDarwin && !gambit-params.stable)
+      ${lib.optionalString (gccStdenv.hostPlatform.isDarwin && !gambit-params.stable)
          ''--replace "/usr/local/opt/openssl@1.1" "${lib.getLib openssl}"''} \
         --replace "/usr/local/opt/openssl" "${lib.getLib openssl}"
 
diff --git a/pkgs/development/compilers/gcc/all.nix b/pkgs/development/compilers/gcc/all.nix
index 232241989b9a..5d5abb82c3eb 100644
--- a/pkgs/development/compilers/gcc/all.nix
+++ b/pkgs/development/compilers/gcc/all.nix
@@ -24,7 +24,7 @@ let
         profiledCompiler = false;
         libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then args.libcCross else null;
         threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else { };
-        isl = if       stdenv.isDarwin then null
+        isl = if       stdenv.hostPlatform.isDarwin then null
               else if    atLeast "9"   then isl_0_20
               else    /* atLeast "7" */     isl_0_17;
       } // lib.optionalAttrs (!(atLeast "9")) {
diff --git a/pkgs/development/compilers/gcc/patches/default.nix b/pkgs/development/compilers/gcc/patches/default.nix
index b226975ef034..9c756ccfa4ee 100644
--- a/pkgs/development/compilers/gcc/patches/default.nix
+++ b/pkgs/development/compilers/gcc/patches/default.nix
@@ -120,16 +120,16 @@ in
 ## Darwin
 
 # Fixes detection of Darwin on x86_64-darwin. Otherwise, GCC uses a deployment target of 10.5, which crashes ld64.
-++ optional (atLeast14 && stdenv.isDarwin && stdenv.isx86_64) ../patches/14/libgcc-darwin-detection.patch
+++ optional (atLeast14 && stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ../patches/14/libgcc-darwin-detection.patch
 
 # Fix detection of bootstrap compiler Ada support (cctools as) on Nix Darwin
-++ optional (atLeast12 && stdenv.isDarwin && langAda) ./ada-cctools-as-detection-configure.patch
+++ optional (atLeast12 && stdenv.hostPlatform.isDarwin && langAda) ./ada-cctools-as-detection-configure.patch
 
 # Remove CoreServices on Darwin, as it is only needed for macOS SDK 14+
-++ optional (atLeast14 && stdenv.isDarwin && langAda) ../patches/14/gcc-darwin-remove-coreservices.patch
+++ optional (atLeast14 && stdenv.hostPlatform.isDarwin && langAda) ../patches/14/gcc-darwin-remove-coreservices.patch
 
 # Use absolute path in GNAT dylib install names on Darwin
-++ optionals (stdenv.isDarwin && langAda) ({
+++ optionals (stdenv.hostPlatform.isDarwin && langAda) ({
   "14" = [ ../patches/14/gnat-darwin-dylib-install-name-14.patch ];
   "13" = [ ./gnat-darwin-dylib-install-name-13.patch ];
   "12" = [ ./gnat-darwin-dylib-install-name.patch ];
@@ -137,7 +137,7 @@ in
 
 # We only apply this patch when building a native toolchain for aarch64-darwin, as it breaks building
 # a foreign one: https://github.com/iains/gcc-12-branch/issues/18
-++ optionals (stdenv.isDarwin && stdenv.isAarch64 && buildPlatform == hostPlatform && hostPlatform == targetPlatform) ({
+++ optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 && buildPlatform == hostPlatform && hostPlatform == targetPlatform) ({
   "14" = [ (fetchpatch {
     # There are no upstream release tags in https://github.com/iains/gcc-14-branch.
     # 04696df09633baf97cdbbdd6e9929b9d472161d3 is the commit from https://github.com/gcc-mirror/gcc/releases/tag/releases%2Fgcc-14.2.0
@@ -170,7 +170,7 @@ in
 }.${majorVersion} or [])
 
 # Work around newer AvailabilityInternal.h when building older versions of GCC.
-++ optionals (stdenv.isDarwin) ({
+++ optionals (stdenv.hostPlatform.isDarwin) ({
   "9" = [ ../patches/9/AvailabilityInternal.h-fixincludes.patch ];
   "8" = [ ../patches/8/AvailabilityInternal.h-fixincludes.patch ];
   "7" = [ ../patches/7/AvailabilityInternal.h-fixincludes.patch ];
@@ -202,7 +202,7 @@ in
 ## gcc 11.0 and older ##############################################################################
 
 # libgcc’s `configure` script misdetects aarch64-darwin, resulting in an invalid deployment target.
-++ optional (is11 && stdenv.isDarwin && stdenv.isAarch64) ./11/libgcc-aarch64-darwin-detection.patch
+++ optional (is11 && stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ./11/libgcc-aarch64-darwin-detection.patch
 
 # openjdk build fails without this on -march=opteron; is upstream in gcc12
 ++ optionals (is11) [ ./11/gcc-issue-103910.patch ]
diff --git a/pkgs/development/compilers/gerbil/build.nix b/pkgs/development/compilers/gerbil/build.nix
index c71ea137eadc..5ed7339c31be 100644
--- a/pkgs/development/compilers/gerbil/build.nix
+++ b/pkgs/development/compilers/gerbil/build.nix
@@ -106,7 +106,7 @@ stdenv.mkDerivation rec {
     ./install.sh
     (cd $out/bin ; ln -s ../gerbil/bin/* .)
     runHook postInstall
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     libgerbil="$(realpath "$out/gerbil/lib/libgerbil.so")"
     install_name_tool -id "$libgerbil" "$libgerbil"
   '';
diff --git a/pkgs/development/compilers/gforth/boot-forth.nix b/pkgs/development/compilers/gforth/boot-forth.nix
index 657847164bb0..9a4d676f5130 100644
--- a/pkgs/development/compilers/gforth/boot-forth.nix
+++ b/pkgs/development/compilers/gforth/boot-forth.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
 
   buildInputs = [ m4 ];
 
-  configureFlags = lib.optionals stdenv.isDarwin [ "--build=x86_64-apple-darwin" ];
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "--build=x86_64-apple-darwin" ];
 
   meta = {
     description = "Forth implementation of the GNU project (outdated version used to bootstrap)";
diff --git a/pkgs/development/compilers/gforth/default.nix b/pkgs/development/compilers/gforth/default.nix
index 56d89fd628f2..6b68f7b47c5c 100644
--- a/pkgs/development/compilers/gforth/default.nix
+++ b/pkgs/development/compilers/gforth/default.nix
@@ -29,7 +29,7 @@ in stdenv.mkDerivation rec {
 
   configureFlags = [
     "--with-lispdir=${lispDir}"
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "--build=x86_64-apple-darwin"
   ];
 
@@ -41,7 +41,7 @@ in stdenv.mkDerivation rec {
     description = "Forth implementation of the GNU project";
     homepage = "https://github.com/forthy42/gforth";
     license = lib.licenses.gpl3;
-    broken = stdenv.isDarwin && stdenv.isAarch64; # segfault when running ./gforthmi
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64; # segfault when running ./gforthmi
     platforms = lib.platforms.all;
   };
 }
diff --git a/pkgs/development/compilers/ghc/8.10.7-binary.nix b/pkgs/development/compilers/ghc/8.10.7-binary.nix
index a4602c9a645c..20ad72462401 100644
--- a/pkgs/development/compilers/ghc/8.10.7-binary.nix
+++ b/pkgs/development/compilers/ghc/8.10.7-binary.nix
@@ -199,7 +199,7 @@ stdenv.mkDerivation rec {
     # rcodesign is used to replace the signature instead of sigtool because it
     # supports setting the linker-signed flag, which will ensure future processing
     # of the binaries does not invalidate their signatures.
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ rcodesign ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ rcodesign ];
 
   # Set LD_LIBRARY_PATH or equivalent so that the programs running as part
   # of the bindist installer can find the libraries they expect.
@@ -245,14 +245,14 @@ stdenv.mkDerivation rec {
         ])
     # GHC has dtrace probes, which causes ld to try to open /usr/lib/libdtrace.dylib
     # during linking
-    + lib.optionalString stdenv.isDarwin (''
+    + lib.optionalString stdenv.hostPlatform.isDarwin (''
       export NIX_LDFLAGS+=" -no_dtrace_dof"
       # not enough room in the object files for the full path to libiconv :(
       for exe in $(find . -type f -executable); do
         isScript $exe && continue
         ln -fs ${libiconv}/lib/libiconv.dylib $(dirname $exe)/libiconv.dylib
         install_name_tool -change /usr/lib/libiconv.2.dylib @executable_path/libiconv.dylib -change /usr/local/lib/gcc/6/libgcc_s.1.dylib ${gcc.cc.lib}/lib/libgcc_s.1.dylib $exe
-    '' + lib.optionalString stdenv.isAarch64 ''
+    '' + lib.optionalString stdenv.hostPlatform.isAarch64 ''
         # Resign the binary and set the linker-signed flag. Ignore failures when the file is an object file.
         # Object files don’t have signatures, so ignoring the failures is harmless.
         rcodesign sign --code-signature-flags linker-signed $exe || true
@@ -274,7 +274,7 @@ stdenv.mkDerivation rec {
     ''
       find . -name integer-gmp.buildinfo \
           -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${gmp.out}/lib@" {} \;
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       find . -name base.buildinfo \
           -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${libiconv}/lib@" {} \;
     '' +
@@ -285,7 +285,7 @@ stdenv.mkDerivation rec {
           -exec sed -i "s@FFI_LIB_DIR@FFI_LIB_DIR ${numactl.out}/lib@g" {} \;
     '' +
     # Rename needed libraries and binaries, fix interpreter
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       find . -type f -executable -exec patchelf \
           --interpreter ${stdenv.cc.bintools.dynamicLinker} {} \;
     '' +
@@ -314,7 +314,7 @@ stdenv.mkDerivation rec {
     "--with-gmp-includes=${lib.getDev gmp}/include"
     # Note `--with-gmp-libraries` does nothing for GHC bindists:
     # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6124
-  ] ++ lib.optional stdenv.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
     # From: https://github.com/NixOS/nixpkgs/pull/43369/commits
     ++ lib.optional stdenv.hostPlatform.isMusl "--disable-ld-override";
 
@@ -349,7 +349,7 @@ stdenv.mkDerivation rec {
 
   # On Linux, use patchelf to modify the executables so that they can
   # find editline/gmp.
-  postFixup = lib.optionalString stdenv.isLinux
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux
     (if stdenv.hostPlatform.isAarch64 then
       # Keep rpath as small as possible on aarch64 for patchelf#244.  All Elfs
       # are 2 directories deep from $out/lib, so pooling symlinks there makes
@@ -377,7 +377,7 @@ stdenv.mkDerivation rec {
           patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
         fi
       done
-    '') + lib.optionalString stdenv.isDarwin ''
+    '') + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # not enough room in the object files for the full path to libiconv :(
     for exe in $(find "$out" -type f -executable); do
       isScript $exe && continue
diff --git a/pkgs/development/compilers/ghc/8.10.7.nix b/pkgs/development/compilers/ghc/8.10.7.nix
index a6694e2e99c9..d0f9130ff3fe 100644
--- a/pkgs/development/compilers/ghc/8.10.7.nix
+++ b/pkgs/development/compilers/ghc/8.10.7.nix
@@ -69,7 +69,7 @@ assert !enableIntegerSimple -> gmp != null;
 assert (stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
 
 let
-  libffi_name = if stdenv.isDarwin && stdenv.isAarch64 then "libffi" else "libffi_3_3";
+  libffi_name = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 then "libffi" else "libffi_3_3";
   inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
   inherit (bootPkgs) ghc;
@@ -253,7 +253,7 @@ stdenv.mkDerivation (rec {
       url = "https://gitlab.haskell.org/ghc/ghc/-/commit/8f7dd5710b80906ea7a3e15b7bb56a883a49fed8.patch";
       hash = "sha256-C636Nq2U8YOG/av7XQmG3L1rU0bmC9/7m7Hty5pm5+s=";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Make Block.h compile with c++ compilers. Remove with the next release
     (fetchpatch {
       url = "https://gitlab.haskell.org/ghc/ghc/-/commit/97d0b0a367e4c6a52a17c3299439ac7de129da24.patch";
@@ -302,9 +302,9 @@ stdenv.mkDerivation (rec {
 
     echo -n "${buildMK}" > mk/build.mk
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export NIX_LDFLAGS+=" -no_dtrace_dof"
 
     # GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
@@ -366,7 +366,7 @@ stdenv.mkDerivation (rec {
   nativeBuildInputs = [
     perl autoreconfHook autoconf automake m4 python3
     ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
     sphinx
diff --git a/pkgs/development/compilers/ghc/8.6.5-binary.nix b/pkgs/development/compilers/ghc/8.6.5-binary.nix
index d66f47b661a5..eef0cba9f00b 100644
--- a/pkgs/development/compilers/ghc/8.6.5-binary.nix
+++ b/pkgs/development/compilers/ghc/8.6.5-binary.nix
@@ -26,7 +26,7 @@ let
   libEnvVar = lib.optionalString stdenv.hostPlatform.isDarwin "DY"
     + "LD_LIBRARY_PATH";
 
-  glibcDynLinker = assert stdenv.isLinux;
+  glibcDynLinker = assert stdenv.hostPlatform.isLinux;
     if stdenv.hostPlatform.libc == "glibc" then
        # Could be stdenv.cc.bintools.dynamicLinker, keeping as-is to avoid rebuild.
        ''"$(cat $NIX_CC/nix-support/dynamic-linker)"''
@@ -88,7 +88,7 @@ stdenv.mkDerivation rec {
   postUnpack =
     # GHC has dtrace probes, which causes ld to try to open /usr/lib/libdtrace.dylib
     # during linking
-    lib.optionalString stdenv.isDarwin ''
+    lib.optionalString stdenv.hostPlatform.isDarwin ''
       export NIX_LDFLAGS+=" -no_dtrace_dof"
       # not enough room in the object files for the full path to libiconv :(
       for exe in $(find . -type f -executable); do
@@ -110,15 +110,15 @@ stdenv.mkDerivation rec {
     ''
       find . -name integer-gmp.buildinfo \
           -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${gmp.out}/lib@" {} \;
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       find . -name base.buildinfo \
           -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${libiconv}/lib@" {} \;
     '' +
     # Rename needed libraries and binaries, fix interpreter
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       find . -type f -perm -0100 \
           -exec patchelf \
-          --replace-needed libncurses${lib.optionalString stdenv.is64bit "w"}.so.5 libncurses.so \
+          --replace-needed libncurses${lib.optionalString stdenv.hostPlatform.is64bit "w"}.so.5 libncurses.so \
           ${ # This isn't required for x86_64-linux where we use ncurses6
              lib.optionalString (!useNcurses6) "--replace-needed libtinfo.so libtinfo.so.5"
            } \
@@ -142,7 +142,7 @@ stdenv.mkDerivation rec {
     "--with-gmp-includes=${lib.getDev gmp}/include"
     # Note `--with-gmp-libraries` does nothing for GHC bindists:
     # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6124
-  ] ++ lib.optional stdenv.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
     ++ lib.optional stdenv.hostPlatform.isMusl "--disable-ld-override";
 
   # No building is necessary, but calling make without flags ironically
@@ -160,14 +160,14 @@ stdenv.mkDerivation rec {
 
   # On Linux, use patchelf to modify the executables so that they can
   # find editline/gmp.
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for p in $(find "$out" -type f -executable); do
       if isELF "$p"; then
         echo "Patchelfing $p"
         patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
       fi
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # not enough room in the object files for the full path to libiconv :(
     for exe in $(find "$out" -type f -executable); do
       isScript $exe && continue
diff --git a/pkgs/development/compilers/ghc/9.2.4-binary.nix b/pkgs/development/compilers/ghc/9.2.4-binary.nix
index 920b63ce4eab..e8c6d83ea82f 100644
--- a/pkgs/development/compilers/ghc/9.2.4-binary.nix
+++ b/pkgs/development/compilers/ghc/9.2.4-binary.nix
@@ -222,7 +222,7 @@ stdenv.mkDerivation rec {
         ])
     # GHC has dtrace probes, which causes ld to try to open /usr/lib/libdtrace.dylib
     # during linking
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       export NIX_LDFLAGS+=" -no_dtrace_dof"
       # not enough room in the object files for the full path to libiconv :(
       for exe in $(find . -type f -executable); do
@@ -247,7 +247,7 @@ stdenv.mkDerivation rec {
       # we need to modify the package db directly for hadrian bindists
       find . -name 'ghc-bignum*.conf' \
           -exec sed -e '/^[a-z-]*library-dirs/a \    ${lib.getLib gmpUsed}/lib' -i {} \;
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # we need to modify the package db directly for hadrian bindists
       # (all darwin bindists are hadrian-based for 9.2.2)
       find . -name 'base*.conf' \
@@ -266,7 +266,7 @@ stdenv.mkDerivation rec {
           -exec sed -i "s@FFI_LIB_DIR@FFI_LIB_DIR ${numactl.out}/lib@g" {} \;
     '' +
     # Rename needed libraries and binaries, fix interpreter
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       find . -type f -executable -exec patchelf \
           --interpreter ${stdenv.cc.bintools.dynamicLinker} {} \;
     '';
@@ -281,7 +281,7 @@ stdenv.mkDerivation rec {
     "--with-gmp-includes=${lib.getDev gmpUsed}/include"
     # Note `--with-gmp-libraries` does nothing for GHC bindists:
     # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6124
-  ] ++ lib.optional stdenv.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
     # From: https://github.com/NixOS/nixpkgs/pull/43369/commits
     ++ lib.optional stdenv.hostPlatform.isMusl "--disable-ld-override";
 
@@ -316,7 +316,7 @@ stdenv.mkDerivation rec {
 
   # On Linux, use patchelf to modify the executables so that they can
   # find editline/gmp.
-  postFixup = lib.optionalString (stdenv.isLinux && !(binDistUsed.isStatic or false))
+  postFixup = lib.optionalString (stdenv.hostPlatform.isLinux && !(binDistUsed.isStatic or false))
     (if stdenv.hostPlatform.isAarch64 then
       # Keep rpath as small as possible on aarch64 for patchelf#244.  All Elfs
       # are 2 directories deep from $out/lib, so pooling symlinks there makes
@@ -344,7 +344,7 @@ stdenv.mkDerivation rec {
           patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
         fi
       done
-    '') + lib.optionalString stdenv.isDarwin ''
+    '') + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # not enough room in the object files for the full path to libiconv :(
     for exe in $(find "$out" -type f -executable); do
       isScript $exe && continue
diff --git a/pkgs/development/compilers/ghc/9.6.3-binary.nix b/pkgs/development/compilers/ghc/9.6.3-binary.nix
index d67e9f47ac48..6d8f195bb9d3 100644
--- a/pkgs/development/compilers/ghc/9.6.3-binary.nix
+++ b/pkgs/development/compilers/ghc/9.6.3-binary.nix
@@ -218,7 +218,7 @@ stdenv.mkDerivation rec {
         ])
     # GHC has dtrace probes, which causes ld to try to open /usr/lib/libdtrace.dylib
     # during linking
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       export NIX_LDFLAGS+=" -no_dtrace_dof"
       # not enough room in the object files for the full path to libiconv :(
       for exe in $(find . -type f -executable); do
@@ -235,7 +235,7 @@ stdenv.mkDerivation rec {
           -exec sed -e '/^[a-z-]*library-dirs/a \    ${lib.getLib gmpUsed}/lib' -i {} \;
     ''
     # Similar for iconv and libffi on darwin
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       find . -name 'base*.conf' \
           -exec sed -e '/^[a-z-]*library-dirs/a \    ${lib.getLib libiconv}/lib' -i {} \;
 
@@ -252,7 +252,7 @@ stdenv.mkDerivation rec {
           -exec sed -i "s@FFI_LIB_DIR@FFI_LIB_DIR ${numactl.out}/lib@g" {} \;
     '' +
     # Rename needed libraries and binaries, fix interpreter
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       find . -type f -executable -exec patchelf \
           --interpreter ${stdenv.cc.bintools.dynamicLinker} {} \;
     '';
@@ -267,7 +267,7 @@ stdenv.mkDerivation rec {
 
   configurePlatforms = [ ];
   configureFlags =
-    lib.optional stdenv.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
+    lib.optional stdenv.hostPlatform.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
     # From: https://github.com/NixOS/nixpkgs/pull/43369/commits
     ++ lib.optional stdenv.hostPlatform.isMusl "--disable-ld-override";
 
@@ -308,7 +308,7 @@ stdenv.mkDerivation rec {
 
   # On Linux, use patchelf to modify the executables so that they can
   # find editline/gmp.
-  postFixup = lib.optionalString (stdenv.isLinux && !(binDistUsed.isStatic or false))
+  postFixup = lib.optionalString (stdenv.hostPlatform.isLinux && !(binDistUsed.isStatic or false))
     (if stdenv.hostPlatform.isAarch64 then
       # Keep rpath as small as possible on aarch64 for patchelf#244.  All Elfs
       # are 2 directories deep from $out/lib, so pooling symlinks there makes
@@ -336,7 +336,7 @@ stdenv.mkDerivation rec {
           patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
         fi
       done
-    '') + lib.optionalString stdenv.isDarwin ''
+    '') + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # not enough room in the object files for the full path to libiconv :(
     for exe in $(find "$out" -type f -executable); do
       isMachO $exe || continue
diff --git a/pkgs/development/compilers/ghc/common-hadrian.nix b/pkgs/development/compilers/ghc/common-hadrian.nix
index b6d4d7236fe6..31d1e52ea95b 100644
--- a/pkgs/development/compilers/ghc/common-hadrian.nix
+++ b/pkgs/development/compilers/ghc/common-hadrian.nix
@@ -368,11 +368,11 @@ stdenv.mkDerivation ({
     # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
     export CLANG="${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
   '' +
-  lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
+  lib.optionalString (stdenv.hostPlatform.isLinux && hostPlatform.libc == "glibc") ''
     export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export NIX_LDFLAGS+=" -no_dtrace_dof"
 
     # GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
@@ -476,7 +476,7 @@ stdenv.mkDerivation ({
     autoconf automake m4
     # Python is used in a few scripts invoked by hadrian to generate e.g. rts headers.
     python3
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
     sphinx
diff --git a/pkgs/development/compilers/ghc/common-make-native-bignum.nix b/pkgs/development/compilers/ghc/common-make-native-bignum.nix
index 2b23cd75a0ed..f6b6c33e9f9f 100644
--- a/pkgs/development/compilers/ghc/common-make-native-bignum.nix
+++ b/pkgs/development/compilers/ghc/common-make-native-bignum.nix
@@ -309,13 +309,13 @@ stdenv.mkDerivation (rec {
   ''
   + lib.optionalString (lib.versionOlder version "9.2" || lib.versionAtLeast version "9.4") ''
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
+  '' + lib.optionalString (stdenv.hostPlatform.isLinux && hostPlatform.libc == "glibc") ''
     export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export NIX_LDFLAGS+=" -no_dtrace_dof"
-  '' + lib.optionalString (stdenv.isDarwin && lib.versionAtLeast version "9.2") ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionAtLeast version "9.2") ''
 
     # GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
     export XATTR=${lib.getBin xattr}/bin/xattr
@@ -383,11 +383,11 @@ stdenv.mkDerivation (rec {
   nativeBuildInputs = [
     perl autoconf automake m4 python3
     ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
     sphinx
-  ] ++ lib.optionals (stdenv.isDarwin && lib.versions.majorMinor version == "9.0") [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && lib.versions.majorMinor version == "9.0") [
     # TODO(@sternenseemann): backport addition of XATTR env var like
     # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6447
     xattr
diff --git a/pkgs/development/compilers/ghcjs/8.10/default.nix b/pkgs/development/compilers/ghcjs/8.10/default.nix
index 9a648f838406..aea58c62b6d1 100644
--- a/pkgs/development/compilers/ghcjs/8.10/default.nix
+++ b/pkgs/development/compilers/ghcjs/8.10/default.nix
@@ -74,7 +74,7 @@ in stdenv.mkDerivation {
       xorg.lndir
       gmp
       pkg-config
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       gcc # https://github.com/ghcjs/ghcjs/issues/663
     ];
     dontConfigure = true;
diff --git a/pkgs/development/compilers/gleam/default.nix b/pkgs/development/compilers/gleam/default.nix
index 075088306de6..279136ac60e2 100644
--- a/pkgs/development/compilers/gleam/default.nix
+++ b/pkgs/development/compilers/gleam/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ git pkg-config ];
 
   buildInputs = [ openssl ] ++
-    lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   cargoHash = "sha256-0Vtf9UXLPW5HuqNIAGNyqIXCMTITdG7PuFdw4H4v6a4=";
 
diff --git a/pkgs/development/compilers/go/1.21.nix b/pkgs/development/compilers/go/1.21.nix
index 7c8f1fbd9cde..a4cb04351031 100644
--- a/pkgs/development/compilers/go/1.21.nix
+++ b/pkgs/development/compilers/go/1.21.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   strictDeps = true;
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ stdenv.cc.libc.out ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ stdenv.cc.libc.out ]
     ++ lib.optionals (stdenv.hostPlatform.libc == "glibc") [ stdenv.cc.libc.static ];
 
   depsTargetTargetPropagated = lib.optionals stdenv.targetPlatform.isDarwin [ Foundation Security xcbuild ];
diff --git a/pkgs/development/compilers/go/1.22.nix b/pkgs/development/compilers/go/1.22.nix
index 4060a6cf6975..afda23ba96d8 100644
--- a/pkgs/development/compilers/go/1.22.nix
+++ b/pkgs/development/compilers/go/1.22.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   strictDeps = true;
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ stdenv.cc.libc.out ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ stdenv.cc.libc.out ]
     ++ lib.optionals (stdenv.hostPlatform.libc == "glibc") [ stdenv.cc.libc.static ];
 
   depsTargetTargetPropagated = lib.optionals stdenv.targetPlatform.isDarwin [ Foundation Security xcbuild ];
diff --git a/pkgs/development/compilers/go/1.23.nix b/pkgs/development/compilers/go/1.23.nix
index d4486ff319e4..65c562389b9b 100644
--- a/pkgs/development/compilers/go/1.23.nix
+++ b/pkgs/development/compilers/go/1.23.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   strictDeps = true;
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ stdenv.cc.libc.out ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ stdenv.cc.libc.out ]
     ++ lib.optionals (stdenv.hostPlatform.libc == "glibc") [ stdenv.cc.libc.static ];
 
   depsTargetTargetPropagated = lib.optionals stdenv.targetPlatform.isDarwin [ Foundation Security xcbuild ];
diff --git a/pkgs/development/compilers/gprolog/default.nix b/pkgs/development/compilers/gprolog/default.nix
index 6868ca9f8d8f..3cd5c1bcfa4c 100644
--- a/pkgs/development/compilers/gprolog/default.nix
+++ b/pkgs/development/compilers/gprolog/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-ZwZCtDwPqifr1olh77F+vnB2iPkbaAlWbd1gYTlRLAE=";
   };
 
-  hardeningDisable = lib.optional stdenv.isi686 "pic";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isi686 "pic";
 
   patchPhase = ''
     sed -i -e "s|/tmp/make.log|$TMPDIR/make.log|g" src/Pl2Wam/check_boot
diff --git a/pkgs/development/compilers/graalvm/community-edition/buildGraalvm.nix b/pkgs/development/compilers/graalvm/community-edition/buildGraalvm.nix
index 83d60202a4fc..04f45c1ccddf 100644
--- a/pkgs/development/compilers/graalvm/community-edition/buildGraalvm.nix
+++ b/pkgs/development/compilers/graalvm/community-edition/buildGraalvm.nix
@@ -18,12 +18,12 @@
 , zlib
   # extra params
 , extraCLibs ? [ ]
-, gtkSupport ? stdenv.isLinux
+, gtkSupport ? stdenv.hostPlatform.isLinux
 , useMusl ? false
 , ...
 } @ args:
 
-assert useMusl -> stdenv.isLinux;
+assert useMusl -> stdenv.hostPlatform.isLinux;
 let
   extraArgs = builtins.removeAttrs args [
     "lib"
@@ -51,7 +51,7 @@ let
     "meta"
   ];
 
-  cLibs = lib.optionals stdenv.isLinux (
+  cLibs = lib.optionals stdenv.hostPlatform.isLinux (
     [ glibc zlib.static ]
     ++ lib.optionals (!useMusl) [ glibc.static ]
     ++ lib.optionals useMusl [ musl ]
@@ -86,7 +86,7 @@ let
       #
       # We therefor use --strip-components=1 vs 3 depending on the platform.
       tar xf "$src" -C "$out" --strip-components=${
-        if stdenv.isLinux then "1" else "3"
+        if stdenv.hostPlatform.isLinux then "1" else "3"
       }
 
       # Sanity check
@@ -104,12 +104,12 @@ let
     dontStrip = true;
 
     nativeBuildInputs = [ unzip makeWrapper ]
-      ++ lib.optional stdenv.isLinux autoPatchelfHook;
+      ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
 
     propagatedBuildInputs = [ setJavaClassPath zlib ]
-      ++ lib.optional stdenv.isDarwin darwin.apple_sdk_11_0.frameworks.Foundation;
+      ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk_11_0.frameworks.Foundation;
 
-    buildInputs = lib.optionals stdenv.isLinux [
+    buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib # libasound.so wanted by lib/libjsound.so
       fontconfig
       stdenv.cc.cc.lib # libstdc++.so.6
@@ -136,7 +136,7 @@ let
         ${toString (map (l: "--add-flags '-H:CLibraryPath=${l}/lib'") cLibs)}
     '';
 
-    preFixup = lib.optionalString (stdenv.isLinux) ''
+    preFixup = lib.optionalString (stdenv.hostPlatform.isLinux) ''
       for bin in $(find "$out/bin" -executable -type f); do
         wrapProgram "$bin" --prefix LD_LIBRARY_PATH : "${runtimeLibraryPath}"
       done
@@ -147,7 +147,7 @@ let
       runHook preInstallCheck
 
       ${# broken in darwin
-      lib.optionalString stdenv.isLinux ''
+      lib.optionalString stdenv.hostPlatform.isLinux ''
         echo "Testing Jshell"
         echo '1 + 1' | $out/bin/jshell
       ''}
@@ -172,14 +172,14 @@ let
       ./helloworld | fgrep 'Hello World'
 
       ${# -H:+StaticExecutableWithDynamicLibC is only available in Linux
-      lib.optionalString (stdenv.isLinux && !useMusl) ''
+      lib.optionalString (stdenv.hostPlatform.isLinux && !useMusl) ''
         echo "Ahead-Of-Time compilation with -H:+StaticExecutableWithDynamicLibC"
         $out/bin/native-image -H:+UnlockExperimentalVMOptions -H:+StaticExecutableWithDynamicLibC -march=compatibility $extraNativeImageArgs HelloWorld
         ./helloworld | fgrep 'Hello World'
       ''}
 
       ${# --static is only available in Linux
-      lib.optionalString (stdenv.isLinux && useMusl) ''
+      lib.optionalString (stdenv.hostPlatform.isLinux && useMusl) ''
         echo "Ahead-Of-Time compilation with --static and --libc=musl"
         $out/bin/native-image $extraNativeImageArgs -march=compatibility --libc=musl --static HelloWorld
         ./helloworld | fgrep 'Hello World'
diff --git a/pkgs/development/compilers/graalvm/community-edition/buildGraalvmProduct.nix b/pkgs/development/compilers/graalvm/community-edition/buildGraalvmProduct.nix
index 907441ff68c4..2c8220d89a0a 100644
--- a/pkgs/development/compilers/graalvm/community-edition/buildGraalvmProduct.nix
+++ b/pkgs/development/compilers/graalvm/community-edition/buildGraalvmProduct.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation ({
   pname = product;
 
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optional stdenv.isLinux autoPatchelfHook
+    ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook
     ++ extraNativeBuildInputs;
 
   buildInputs = [
@@ -41,7 +41,7 @@ stdenv.mkDerivation ({
     zlib
     libxcrypt-legacy # libcrypt.so.1 (default is .2 now)
   ]
-  ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Foundation
+  ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Foundation
   ++ extraBuildInputs;
 
   unpackPhase = ''
diff --git a/pkgs/development/compilers/graalvm/community-edition/default.nix b/pkgs/development/compilers/graalvm/community-edition/default.nix
index bfc9c729689c..c546d65ef02c 100644
--- a/pkgs/development/compilers/graalvm/community-edition/default.nix
+++ b/pkgs/development/compilers/graalvm/community-edition/default.nix
@@ -5,7 +5,7 @@
 lib.makeScope pkgs.newScope (self:
 {
   stdenv =
-    if pkgs.stdenv.isDarwin then
+    if pkgs.stdenv.hostPlatform.isDarwin then
       pkgs.darwin.apple_sdk_11_0.stdenv
     else
       pkgs.stdenv;
diff --git a/pkgs/development/compilers/graalvm/community-edition/truffleruby/default.nix b/pkgs/development/compilers/graalvm/community-edition/truffleruby/default.nix
index 95e9c56fc23c..da971347652e 100644
--- a/pkgs/development/compilers/graalvm/community-edition/truffleruby/default.nix
+++ b/pkgs/development/compilers/graalvm/community-edition/truffleruby/default.nix
@@ -17,7 +17,7 @@ graalvmCEPackages.buildGraalvmProduct {
     openssl
   ];
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/lib/mri/openssl.so \
       --replace-needed libssl.so.10 libssl.so \
       --replace-needed libcrypto.so.10 libcrypto.so
@@ -31,7 +31,7 @@ graalvmCEPackages.buildGraalvmProduct {
     export LC_ALL=C
     $out/bin/ruby -e 'puts(1 + 1)'
     ${# broken in darwin with sandbox enabled
-      lib.optionalString stdenv.isLinux ''
+      lib.optionalString stdenv.hostPlatform.isLinux ''
       echo '1 + 1' | $out/bin/irb
     ''}
   '';
diff --git a/pkgs/development/compilers/halide/default.nix b/pkgs/development/compilers/halide/default.nix
index 738ecc81a156..d34ee3af9163 100644
--- a/pkgs/development/compilers/halide/default.nix
+++ b/pkgs/development/compilers/halide/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   # Note: on x86_64-darwin, clang fails to find AvailabilityVersions.h, so we remove it.
   # Halide uses AvailabilityVersions.h and TargetConditionals.h to determine whether
   # ::aligned_alloc is available. For us, it isn't.
-  + lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     substituteInPlace 'src/runtime/HalideBuffer.h' \
       --replace '#ifdef __APPLE__
     #include <AvailabilityVersions.h>
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
     libjpeg
     eigen
     openblas
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     mesa
     libGL
   ];
diff --git a/pkgs/development/compilers/haxe/default.nix b/pkgs/development/compilers/haxe/default.nix
index 78e5770cc68e..4613b90113ef 100644
--- a/pkgs/development/compilers/haxe/default.nix
+++ b/pkgs/development/compilers/haxe/default.nix
@@ -65,7 +65,7 @@ let
         ]
         ++ (if lib.versionAtLeast version "4.3" then [ pcre2 ] else [ pcre ])
         ++ lib.optional (lib.versionAtLeast version "4.1") mbedtls_2
-        ++ lib.optional (lib.versionAtLeast version "4.1" && stdenv.isDarwin) Security
+        ++ lib.optional (lib.versionAtLeast version "4.1" && stdenv.hostPlatform.isDarwin) Security
         ++ ocamlDependencies version;
 
       src = fetchFromGitHub {
diff --git a/pkgs/development/compilers/idris2/idris2.nix b/pkgs/development/compilers/idris2/idris2.nix
index 2d5ec9a28368..6f39eea61868 100644
--- a/pkgs/development/compilers/idris2/idris2.nix
+++ b/pkgs/development/compilers/idris2/idris2.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     makeWrapper
     clang
     platformChez
-  ] ++ lib.optionals stdenv.isDarwin [ zsh ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ zsh ];
   buildInputs = [
     platformChez
     gmp
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     patchShebangs --build tests
   '';
 
-  makeFlags = [ "PREFIX=$(out)" ] ++ lib.optional stdenv.isDarwin "OS=";
+  makeFlags = [ "PREFIX=$(out)" ] ++ lib.optional stdenv.hostPlatform.isDarwin "OS=";
 
   # The name of the main executable of pkgs.chez is `scheme`
   buildFlags = [
diff --git a/pkgs/development/compilers/idris2/tests.nix b/pkgs/development/compilers/idris2/tests.nix
index bb5cd140c90c..b4193286d49c 100644
--- a/pkgs/development/compilers/idris2/tests.nix
+++ b/pkgs/development/compilers/idris2/tests.nix
@@ -28,7 +28,7 @@ let
         # is not the case with pure nix environments. Thus, we need to include zsh
         # when we build for darwin in tests. While this is impure, this is also what
         # we find in real darwin hosts.
-        nativeBuildInputs = lib.optionals stdenv.isDarwin [ zsh ];
+        nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ zsh ];
       }
       ''
         set -eo pipefail
diff --git a/pkgs/development/compilers/inform7/default.nix b/pkgs/development/compilers/inform7/default.nix
index cb464e3484c2..b4b97af52417 100644
--- a/pkgs/development/compilers/inform7/default.nix
+++ b/pkgs/development/compilers/inform7/default.nix
@@ -29,6 +29,6 @@ in stdenv.mkDerivation {
     maintainers = with maintainers; [ mbbx6spp ];
     platforms = platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = (stdenv.isDarwin && stdenv.isAarch64) || (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/compilers/ispc/default.nix b/pkgs/development/compilers/ispc/default.nix
index b8c48c5c6a01..2aa173fdde24 100644
--- a/pkgs/development/compilers/ispc/default.nix
+++ b/pkgs/development/compilers/ispc/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub
 , cmake, which, m4, python3, bison, flex, llvmPackages, ncurses, xcode, tbb
   # the default test target is sse4, but that is not supported by all Hydra agents
-, testedTargets ? if stdenv.isAarch64 || stdenv.isAarch32 then [ "neon-i32x4" ] else [ "sse2-i32x4" ]
+, testedTargets ? if stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isAarch32 then [ "neon-i32x4" ] else [ "sse2-i32x4" ]
 }:
 
 stdenv.mkDerivation rec {
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-1Ns8w34fXgYrSu3XE89uowjaVoW3MOgKYV1Jb/XRj1Q=";
   };
 
-  nativeBuildInputs = [ cmake which m4 bison flex python3 llvmPackages.libllvm.dev tbb ] ++ lib.lists.optionals stdenv.isDarwin [ xcode ];
+  nativeBuildInputs = [ cmake which m4 bison flex python3 llvmPackages.libllvm.dev tbb ] ++ lib.lists.optionals stdenv.hostPlatform.isDarwin [ xcode ];
 
   buildInputs = with llvmPackages; [
     libllvm libclang openmp ncurses
@@ -61,9 +61,9 @@ stdenv.mkDerivation rec {
     "-DCLANGPP_EXECUTABLE=${llvmPackages.clang}/bin/clang++"
     "-DISPC_INCLUDE_EXAMPLES=OFF"
     "-DISPC_INCLUDE_UTILS=OFF"
-    ("-DARM_ENABLED=" + (if stdenv.isAarch64 || stdenv.isAarch32 then "TRUE" else "FALSE"))
-    ("-DX86_ENABLED=" + (if stdenv.isx86_64 || stdenv.isx86_32 then "TRUE" else "FALSE"))
-  ] ++ lib.lists.optionals stdenv.isDarwin [
+    ("-DARM_ENABLED=" + (if stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isAarch32 then "TRUE" else "FALSE"))
+    ("-DX86_ENABLED=" + (if stdenv.hostPlatform.isx86_64 || stdenv.hostPlatform.isx86_32 then "TRUE" else "FALSE"))
+  ] ++ lib.lists.optionals stdenv.hostPlatform.isDarwin [
     "-DISPC_MACOS_SDK_PATH=${xcode}/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk"
   ];
 
diff --git a/pkgs/development/compilers/jetbrains-jdk/17.nix b/pkgs/development/compilers/jetbrains-jdk/17.nix
index 76d4079baafb..a868a441ba4c 100644
--- a/pkgs/development/compilers/jetbrains-jdk/17.nix
+++ b/pkgs/development/compilers/jetbrains-jdk/17.nix
@@ -147,7 +147,7 @@ openjdk17.overrideAttrs (oldAttrs: rec {
     inherit (openjdk17.meta) license platforms mainProgram;
     maintainers = with maintainers; [ edwtjo ];
 
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
   passthru = oldAttrs.passthru // {
diff --git a/pkgs/development/compilers/jetbrains-jdk/default.nix b/pkgs/development/compilers/jetbrains-jdk/default.nix
index 59a6704e3103..77ac8e904d47 100644
--- a/pkgs/development/compilers/jetbrains-jdk/default.nix
+++ b/pkgs/development/compilers/jetbrains-jdk/default.nix
@@ -147,7 +147,7 @@ jdk.overrideAttrs (oldAttrs: rec {
     inherit (jdk.meta) license platforms mainProgram;
     maintainers = with maintainers; [ edwtjo ];
 
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
   passthru = oldAttrs.passthru // {
diff --git a/pkgs/development/compilers/jetbrains-jdk/jcef.nix b/pkgs/development/compilers/jetbrains-jdk/jcef.nix
index 537133524a2c..9cda4fc51623 100644
--- a/pkgs/development/compilers/jetbrains-jdk/jcef.nix
+++ b/pkgs/development/compilers/jetbrains-jdk/jcef.nix
@@ -45,7 +45,7 @@
 , thrift
 }:
 
-assert !stdenv.isDarwin;
+assert !stdenv.hostPlatform.isDarwin;
 # I can't test darwin
 
 let
diff --git a/pkgs/development/compilers/jsonnet/default.nix b/pkgs/development/compilers/jsonnet/default.nix
index 8e723cdb8211..4dc7557d1379 100644
--- a/pkgs/development/compilers/jsonnet/default.nix
+++ b/pkgs/development/compilers/jsonnet/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DUSE_SYSTEM_GTEST=ON"
     "-DBUILD_STATIC_LIBS=${if stdenv.hostPlatform.isStatic then "ON" else "OFF"}"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "-DBUILD_SHARED_BINARIES=${if stdenv.hostPlatform.isStatic then "OFF" else "ON"}"
   ];
 
diff --git a/pkgs/development/compilers/julia/generic-bin.nix b/pkgs/development/compilers/julia/generic-bin.nix
index 09a8c2bce3bf..fd78e6113850 100644
--- a/pkgs/development/compilers/julia/generic-bin.nix
+++ b/pkgs/development/compilers/julia/generic-bin.nix
@@ -24,14 +24,14 @@ let
     "REPL"
     # Test flaky
     "ccall"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Test flaky on ofborg
     "FileWatching"
     # Test requires pbcopy
     "InteractiveUtils"
     # Test requires network access
     "Sockets"
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # Test Failed at $out/share/julia/stdlib/v1.8/LinearAlgebra/test/blas.jl:702
     "LinearAlgebra/blas"
     # Test Failed at $out/share/julia/test/misc.jl:724
@@ -71,7 +71,7 @@ stdenv.mkDerivation {
         '@test_skip ca_roots_path() != bundled_ca_roots()'
   '';
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
     # https://github.com/JuliaLang/julia/blob/v1.9.0/NEWS.md#external-dependencies
     stdenv.cc.cc
diff --git a/pkgs/development/compilers/julia/generic.nix b/pkgs/development/compilers/julia/generic.nix
index e3360137ca74..53a5067e783a 100644
--- a/pkgs/development/compilers/julia/generic.nix
+++ b/pkgs/development/compilers/julia/generic.nix
@@ -53,10 +53,10 @@ stdenv.mkDerivation rec {
   makeFlags = [
     "prefix=$(out)"
     "USE_BINARYBUILDER=0"
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     # https://github.com/JuliaCI/julia-buildkite/blob/main/utilities/build_envs.sh
     "JULIA_CPU_TARGET=generic;sandybridge,-xsaveopt,clone_all;haswell,-rdrnd,base(1);x86-64-v4,-rdrnd,base(1)"
-  ] ++ lib.optionals stdenv.isAarch64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
     "JULIA_CPU_TARGET=generic;cortex-a57;thunderx2t99;carmel,clone_all;apple-m1,base(3);neoverse-512tvb,base(3)"
   ];
 
diff --git a/pkgs/development/compilers/kind2/default.nix b/pkgs/development/compilers/kind2/default.nix
index 617f86880363..a5a8585d020e 100644
--- a/pkgs/development/compilers/kind2/default.nix
+++ b/pkgs/development/compilers/kind2/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-KzoEh/kMKsHx9K3t1/uQZ7fdsZEM+v8UOft8JjEB1Zw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Security
   ];
 
diff --git a/pkgs/development/compilers/ligo/default.nix b/pkgs/development/compilers/ligo/default.nix
index 8a76de022283..b472eb921cfa 100644
--- a/pkgs/development/compilers/ligo/default.nix
+++ b/pkgs/development/compilers/ligo/default.nix
@@ -113,7 +113,7 @@ ocamlPackages.buildDunePackage rec {
     seqes
     stdint
     tezt
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/compilers/llvm/common/compiler-rt/default.nix b/pkgs/development/compilers/llvm/common/compiler-rt/default.nix
index e43ff09931b8..a6d727739d27 100644
--- a/pkgs/development/compilers/llvm/common/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/common/compiler-rt/default.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation ({
   nativeBuildInputs = [ cmake ]
     ++ (lib.optional (lib.versionAtLeast release_version "15") ninja)
     ++ [ python3 libllvm.dev ]
-    ++ lib.optional stdenv.isDarwin xcbuild.xcrun;
+    ++ lib.optional stdenv.hostPlatform.isDarwin xcbuild.xcrun;
   buildInputs =
     lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders
     ++ lib.optional (stdenv.hostPlatform.isFreeBSD) freebsd.include;
@@ -133,7 +133,7 @@ stdenv.mkDerivation ({
     # `COMPILER_RT_DEFAULT_TARGET_ONLY` does not apply to Darwin:
     # https://github.com/llvm/llvm-project/blob/27ef42bec80b6c010b7b3729ed0528619521a690/compiler-rt/cmake/base-config-ix.cmake#L153
     "-DCOMPILER_RT_ENABLE_IOS=OFF"
-  ]) ++ lib.optionals (lib.versionAtLeast version "19" && stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
+  ]) ++ lib.optionals (lib.versionAtLeast version "19" && stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
     "-DSANITIZER_MIN_OSX_VERSION=10.10"
   ] ++ lib.optionals (noSanitizers && lib.versionAtLeast release_version "19") [
     "-DCOMPILER_RT_BUILD_CTX_PROFILE=OFF"
@@ -146,10 +146,10 @@ stdenv.mkDerivation ({
   # can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
   # get no binary cache for the entire platform. If you really find yourself wanting the TSAN, make this controllable by
   # a flag and turn the flag off during the stdenv build.
-  postPatch = lib.optionalString (!stdenv.isDarwin) ''
+  postPatch = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace cmake/builtin-config-ix.cmake \
       --replace 'set(X86 i386)' 'set(X86 i386 i486 i586 i686)'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace cmake/config-ix.cmake \
       --replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
   '' + lib.optionalString (!haveLibc) ((lib.optionalString (lib.versionAtLeast release_version "18") ''
diff --git a/pkgs/development/compilers/llvm/common/default.nix b/pkgs/development/compilers/llvm/common/default.nix
index 689ea9f7cb7b..2a5d3c9dcdbc 100644
--- a/pkgs/development/compilers/llvm/common/default.nix
+++ b/pkgs/development/compilers/llvm/common/default.nix
@@ -1058,7 +1058,7 @@ let
               lib.optional
                 (
                   lib.versions.major metadata.release_version == "17"
-                  && stdenv.isDarwin
+                  && stdenv.hostPlatform.isDarwin
                   && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13"
                 )
                 # https://github.com/llvm/llvm-project/issues/64226
@@ -1073,7 +1073,7 @@ let
               lib.optional
                 (
                   lib.versionAtLeast metadata.release_version "18"
-                  && stdenv.isDarwin
+                  && stdenv.hostPlatform.isDarwin
                   && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13"
                 )
                 # https://github.com/llvm/llvm-project/issues/64226
diff --git a/pkgs/development/compilers/llvm/common/libcxx/default.nix b/pkgs/development/compilers/llvm/common/libcxx/default.nix
index 2893d012151d..17c687f88394 100644
--- a/pkgs/development/compilers/llvm/common/libcxx/default.nix
+++ b/pkgs/development/compilers/llvm/common/libcxx/default.nix
@@ -121,7 +121,7 @@ stdenv.mkDerivation (rec {
   '';
 
   nativeBuildInputs = [ cmake ninja python3 ]
-    ++ lib.optional stdenv.isDarwin fixDarwinDylibNames
+    ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames
     ++ lib.optional (cxxabi != null) lndir;
 
   buildInputs = [ cxxabi ]
diff --git a/pkgs/development/compilers/llvm/common/lld/default.nix b/pkgs/development/compilers/llvm/common/lld/default.nix
index 2c87d4cfa96f..d5c0f7cb3a09 100644
--- a/pkgs/development/compilers/llvm/common/lld/default.nix
+++ b/pkgs/development/compilers/llvm/common/lld/default.nix
@@ -33,7 +33,7 @@ let
       '(''${LLVM_MAIN_SRC_DIR}/' '('
     mkdir -p libunwind/include
     tar -xf "${libunwind.src}" --wildcards -C libunwind/include --strip-components=2 "libunwind-*/include/"
-  '' + lib.optionalString (lib.versions.major release_version == "13" && stdenv.isDarwin) ''
+  '' + lib.optionalString (lib.versions.major release_version == "13" && stdenv.hostPlatform.isDarwin) ''
     substituteInPlace MachO/CMakeLists.txt --replace \
       '(''${LLVM_MAIN_SRC_DIR}/' '(../'
   '';
diff --git a/pkgs/development/compilers/llvm/common/lldb.nix b/pkgs/development/compilers/llvm/common/lldb.nix
index d174570c1f34..4f679f4dcff1 100644
--- a/pkgs/development/compilers/llvm/common/lldb.nix
+++ b/pkgs/development/compilers/llvm/common/lldb.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation (rec {
 
   # LLDB expects to find the path to `bin` relative to `lib` on Darwin. It can’t be patched with the location of
   # the `lib` output because that would create a cycle between it and the `out` output.
-  outputs = [ "out" "dev" ] ++ lib.optionals (!stdenv.isDarwin) [ "lib" ];
+  outputs = [ "out" "dev" ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ "lib" ];
 
   sourceRoot = lib.optional (lib.versionAtLeast release_version "13") "${src.name}/${pname}";
 
@@ -87,7 +87,7 @@ stdenv.mkDerivation (rec {
     # libclang into the rpath of the lldb executables. By putting it into
     # buildInputs cc-wrapper will set up rpath correctly for us.
     (lib.getLib libclang)
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.libobjc
     darwin.apple_sdk.libs.xpc
     darwin.apple_sdk.frameworks.Foundation
@@ -123,9 +123,9 @@ stdenv.mkDerivation (rec {
     "-DLLVM_ENABLE_RTTI=OFF"
     "-DClang_DIR=${lib.getDev libclang}/lib/cmake"
     "-DLLVM_EXTERNAL_LIT=${lit}/bin/lit"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DLLDB_USE_SYSTEM_DEBUGSERVER=ON"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "-DLLDB_CODESIGN_IDENTITY=" # codesigning makes nondeterministic
   ] ++ lib.optionals (lib.versionAtLeast release_version "17") [
     "-DCLANG_RESOURCE_DIR=../../../../${libclang.lib}"
diff --git a/pkgs/development/compilers/llvm/common/llvm/default.nix b/pkgs/development/compilers/llvm/common/llvm/default.nix
index e39ba171373f..281a21ca1524 100644
--- a/pkgs/development/compilers/llvm/common/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/common/llvm/default.nix
@@ -28,13 +28,13 @@
 , sysctl
 , buildLlvmTools
 , debugVersion ? false
-, doCheck ? !stdenv.isAarch32 && (if lib.versionOlder release_version "15" then stdenv.isLinux else true)
-  && (!stdenv.isx86_32 /* TODO: why */) && (!stdenv.hostPlatform.isMusl)
+, doCheck ? !stdenv.hostPlatform.isAarch32 && (if lib.versionOlder release_version "15" then stdenv.hostPlatform.isLinux else true)
+  && (!stdenv.hostPlatform.isx86_32 /* TODO: why */) && (!stdenv.hostPlatform.isMusl)
   && !(stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isBigEndian)
   && (stdenv.hostPlatform == stdenv.buildPlatform)
 , enableManpages ? false
 , enableSharedLibraries ? !stdenv.hostPlatform.isStatic
-, enablePFM ? stdenv.isLinux /* PFM only supports Linux */
+, enablePFM ? stdenv.hostPlatform.isLinux /* PFM only supports Linux */
   # broken for Ampere eMAG 8180 (c2.large.arm on Packet) #56245
   # broken for the armv7l builder
   && !stdenv.hostPlatform.isAarch
@@ -126,7 +126,7 @@ stdenv.mkDerivation (rec {
   propagatedBuildInputs = (lib.optional (lib.versionAtLeast release_version "14" || stdenv.buildPlatform == stdenv.hostPlatform) ncurses)
     ++ [ zlib ];
 
-  postPatch = optionalString stdenv.isDarwin (''
+  postPatch = optionalString stdenv.hostPlatform.isDarwin (''
     substituteInPlace cmake/modules/AddLLVM.cmake \
       --replace 'set(_install_name_dir INSTALL_NAME_DIR "@rpath")' "set(_install_name_dir)" \
       --replace 'set(_install_rpath "@loader_path/../''${CMAKE_INSTALL_LIBDIR}''${LLVM_LIBDIR_SUFFIX}" ''${extra_libdir})' ""
@@ -167,7 +167,7 @@ stdenv.mkDerivation (rec {
       --replace "PhysicalFileSystemWorkingDirFailure" "DISABLED_PhysicalFileSystemWorkingDirFailure"
   ''))) +
     # dup of above patch with different conditions
-    optionalString (stdenv.isDarwin && stdenv.hostPlatform.isx86 && lib.versionAtLeast release_version "15") (optionalString (lib.versionOlder release_version "16") ''
+    optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86 && lib.versionAtLeast release_version "15") (optionalString (lib.versionOlder release_version "16") ''
     substituteInPlace test/ExecutionEngine/Interpreter/intrinsics.ll \
       --replace "%roundeven32 = call float @llvm.roundeven.f32(float 0.000000e+00)" "" \
       --replace "%roundeven64 = call double @llvm.roundeven.f64(double 0.000000e+00)" ""
@@ -267,7 +267,7 @@ stdenv.mkDerivation (rec {
     # It seems to reference /usr/local/lib/libfile.a, which is clearly a problem.
     # 2. This test fails for the same reason it fails on MacOS, but the fix is
     # not trivial to apply.
-    optionalString stdenv.isFreeBSD ''
+    optionalString stdenv.hostPlatform.isFreeBSD ''
     rm test/tools/llvm-libtool-darwin/L-and-l.test
     rm test/ExecutionEngine/Interpreter/intrinsics.ll
   '' + ''
@@ -319,7 +319,7 @@ stdenv.mkDerivation (rec {
   '';
 
   # E.g. Mesa uses the build-id as a cache key (see #93946):
-  LDFLAGS = optionalString (enableSharedLibraries && !stdenv.isDarwin) "-Wl,--build-id=sha1";
+  LDFLAGS = optionalString (enableSharedLibraries && !stdenv.hostPlatform.isDarwin) "-Wl,--build-id=sha1";
 
   cmakeBuildType = if debugVersion then "Debug" else "Release";
 
@@ -367,7 +367,7 @@ stdenv.mkDerivation (rec {
     "-DSPHINX_WARNINGS_AS_ERRORS=OFF"
   ] ++ optionals (enableGoldPlugin) [
     "-DLLVM_BINUTILS_INCDIR=${libbfd.dev}/include"
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     "-DLLVM_ENABLE_LIBCXX=ON"
     "-DCAN_TARGET_i386=false"
   ] ++ optionals ((stdenv.hostPlatform != stdenv.buildPlatform) && !(stdenv.buildPlatform.canExecute stdenv.hostPlatform)) [
@@ -416,10 +416,10 @@ stdenv.mkDerivation (rec {
     substituteInPlace "$dev/lib/cmake/llvm/LLVMConfig.cmake" \
       --replace 'set(LLVM_BINARY_DIR "''${LLVM_INSTALL_PREFIX}")' 'set(LLVM_BINARY_DIR "'"$lib"'")'
   '')
-  + optionalString (stdenv.isDarwin && enableSharedLibraries && lib.versionOlder release_version "18") ''
+  + optionalString (stdenv.hostPlatform.isDarwin && enableSharedLibraries && lib.versionOlder release_version "18") ''
     ln -s $lib/lib/libLLVM.dylib $lib/lib/libLLVM-${shortVersion}.dylib
   ''
-  + optionalString (stdenv.isDarwin && enableSharedLibraries) ''
+  + optionalString (stdenv.hostPlatform.isDarwin && enableSharedLibraries) ''
     ln -s $lib/lib/libLLVM.dylib $lib/lib/libLLVM-${release_version}.dylib
   ''
   + optionalString (stdenv.buildPlatform != stdenv.hostPlatform) (if stdenv.buildPlatform.canExecute stdenv.hostPlatform then ''
@@ -495,7 +495,7 @@ stdenv.mkDerivation (rec {
     mv polly-* $sourceRoot/tools/polly
   '';
 } // lib.optionalAttrs (lib.versionAtLeast release_version "13") {
-  nativeCheckInputs = [ which ] ++ lib.optional (stdenv.isDarwin && lib.versionAtLeast release_version "15") sysctl;
+  nativeCheckInputs = [ which ] ++ lib.optional (stdenv.hostPlatform.isDarwin && lib.versionAtLeast release_version "15") sysctl;
 } // lib.optionalAttrs (lib.versionOlder release_version "15") {
   # hacky fix: created binaries need to be run before installation
   preBuild = ''
diff --git a/pkgs/development/compilers/llvm/common/mlir/default.nix b/pkgs/development/compilers/llvm/common/mlir/default.nix
index 3ef689b7fefe..e4dd12d69e58 100644
--- a/pkgs/development/compilers/llvm/common/mlir/default.nix
+++ b/pkgs/development/compilers/llvm/common/mlir/default.nix
@@ -9,7 +9,7 @@
 , libxml2
 , libllvm
 , version
-, doCheck ? (!stdenv.isx86_32 /* TODO: why */) && (!stdenv.hostPlatform.isMusl)
+, doCheck ? (!stdenv.hostPlatform.isx86_32 /* TODO: why */) && (!stdenv.hostPlatform.isMusl)
 , devExtraCmakeFlags ? []
 }:
 
diff --git a/pkgs/development/compilers/lobster/default.nix b/pkgs/development/compilers/lobster/default.nix
index 645e7019aa73..2ebe573cf513 100644
--- a/pkgs/development/compilers/lobster/default.nix
+++ b/pkgs/development/compilers/lobster/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = if stdenv.isDarwin
+  buildInputs = if stdenv.hostPlatform.isDarwin
     then [
       CoreFoundation
       Cocoa
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
   passthru.tests.can-run-hello-world = callPackage ./test-can-run-hello-world.nix {};
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://strlen.com/lobster/";
     description = "Lobster programming language";
     mainProgram = "lobster";
diff --git a/pkgs/development/compilers/minimacy/default.nix b/pkgs/development/compilers/minimacy/default.nix
index ae4da0d5b027..6f4d14b27901 100644
--- a/pkgs/development/compilers/minimacy/default.nix
+++ b/pkgs/development/compilers/minimacy/default.nix
@@ -22,18 +22,18 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ makeBinaryWrapper ];
 
-  buildInputs = [ libGL libGLU ] ++ lib.optionals stdenv.isLinux [ alsa-lib libX11 libXext ];
+  buildInputs = [ libGL libGLU ] ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib libX11 libXext ];
 
   enableParallelBuilding = true;
 
   env.NIX_CFLAGS_COMPILE = "-Wno-unused-result";
 
   preBuild = ''
-    pushd ${if stdenv.isDarwin then "macos/cmdline" else "unix"}
+    pushd ${if stdenv.hostPlatform.isDarwin then "macos/cmdline" else "unix"}
   '';
 
   # TODO: build graphic version for darwin
-  buildFlags = (if stdenv.isDarwin then [ "nox" ] else [ "all" ]) ++ [ "CC=${stdenv.cc.targetPrefix}cc" ];
+  buildFlags = (if stdenv.hostPlatform.isDarwin then [ "nox" ] else [ "all" ]) ++ [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   postBuild = ''
     popd
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   checkPhase = ''
     runHook preCheck
 
-    bin/${if stdenv.isDarwin then "minimacyMac" else "minimacy"} system/demo/demo.fun.mandelbrot.mcy
+    bin/${if stdenv.hostPlatform.isDarwin then "minimacyMac" else "minimacy"} system/demo/demo.fun.mandelbrot.mcy
 
     runHook postCheck
   '';
diff --git a/pkgs/development/compilers/mit-scheme/default.nix b/pkgs/development/compilers/mit-scheme/default.nix
index 1abbac512aa7..c9fc962e30b4 100644
--- a/pkgs/development/compilers/mit-scheme/default.nix
+++ b/pkgs/development/compilers/mit-scheme/default.nix
@@ -15,9 +15,9 @@
 
 let
   version = "12.1";
-  bootstrapFromC = ! ((stdenv.isLinux && stdenv.isAarch64) || stdenv.isx86_64);
+  bootstrapFromC = ! ((stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isx86_64);
 
-  arch = if stdenv.isLinux && stdenv.isAarch64 then
+  arch = if stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64 then
     "-aarch64le"
    else
      "-x86-64";
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
   # leads to more efficient code than when building the tarball that contains
   # generated C code instead of those binaries.
   src =
-    if stdenv.isLinux && stdenv.isAarch64
+    if stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64
     then fetchurl {
       url = "mirror://gnu/mit-scheme/stable.pkg/${version}/mit-scheme-${version}-aarch64le.tar.gz";
       sha256 = "12ra9bc93x8g07impbd8jr6djjzwpb9qvh9zhxvvrba3332zx3vh";
diff --git a/pkgs/development/compilers/mkcl/default.nix b/pkgs/development/compilers/mkcl/default.nix
index 0b95f3e9b2a6..ae2d11feb765 100644
--- a/pkgs/development/compilers/mkcl/default.nix
+++ b/pkgs/development/compilers/mkcl/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "ANSI Common Lisp Implementation";
     homepage = "https://common-lisp.net/project/mkcl/";
     license = licenses.lgpl2Plus;
diff --git a/pkgs/development/compilers/mlton/20130715.nix b/pkgs/development/compilers/mlton/20130715.nix
index 98b4aeda5516..90285bf08982 100644
--- a/pkgs/development/compilers/mlton/20130715.nix
+++ b/pkgs/development/compilers/mlton/20130715.nix
@@ -3,7 +3,7 @@
 let
   version = "20130715";
 
-  usr_prefix = if stdenv.isDarwin then "usr/local" else "usr";
+  usr_prefix = if stdenv.hostPlatform.isDarwin then "usr/local" else "usr";
 
   dynamic_linker = stdenv.cc.bintools.dynamicLinker;
 in
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   sourceRoot = "${pname}-${version}";
 
   buildInputs = [ gmp ];
-  nativeBuildInputs = lib.optional stdenv.isLinux patchelf;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isLinux patchelf;
 
   makeFlags = [ "all-no-docs" ];
 
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
     substituteInPlace $(pwd)/../${usr_prefix}/bin/mlton --replace '/${usr_prefix}/lib/mlton' $(pwd)/../${usr_prefix}/lib/mlton
   '' + lib.optionalString stdenv.cc.isClang ''
     sed -i "s_	patch -s -p0 <gdtoa.hide-public-fns.patch_	patch -s -p0 <gdtoa.hide-public-fns.patch\n\tsed -i 's|printf(emptyfmt|printf(\"\"|g' ./gdtoa/arithchk.c_" ./runtime/Makefile
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's|XCFLAGS += -I/usr/local/include -I/sw/include -I/opt/local/include||' ./runtime/Makefile
   '';
 
@@ -79,13 +79,13 @@ stdenv.mkDerivation rec {
     # So the builder runs the binary compiler with gmp.
     export LD_LIBRARY_PATH=${gmp.out}/lib''${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH
 
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     # Patch ELF interpreter.
     patchelf --set-interpreter ${dynamic_linker} $(pwd)/../${usr_prefix}/lib/mlton/mlton-compile
     for e in mllex mlyacc ; do
       patchelf --set-interpreter ${dynamic_linker} $(pwd)/../${usr_prefix}/bin/$e
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Patch libgmp linking
     install_name_tool -change /opt/local/lib/libgmp.10.dylib ${gmp}/lib/libgmp.10.dylib $(pwd)/../${usr_prefix}/lib/mlton/mlton-compile
     install_name_tool -change /opt/local/lib/libgmp.10.dylib ${gmp}/lib/libgmp.10.dylib $(pwd)/../${usr_prefix}/bin/mlyacc
diff --git a/pkgs/development/compilers/mlton/20180207-binary.nix b/pkgs/development/compilers/mlton/20180207-binary.nix
index 4846b58bf26b..2384122d70b6 100644
--- a/pkgs/development/compilers/mlton/20180207-binary.nix
+++ b/pkgs/development/compilers/mlton/20180207-binary.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     throw "Architecture not supported";
 
   buildInputs = [ gmp ];
-  nativeBuildInputs = lib.optional stdenv.isLinux patchelf;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isLinux patchelf;
 
   buildPhase = ''
     make update \
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     make install PREFIX=$out
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --set-interpreter ${dynamic-linker} $out/lib/mlton/mlton-compile
     patchelf --set-rpath ${gmp}/lib $out/lib/mlton/mlton-compile
 
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
       patchelf --set-interpreter ${dynamic-linker} $out/bin/$e
       patchelf --set-rpath ${gmp}/lib $out/bin/$e
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change \
       /opt/local/lib/libgmp.10.dylib \
       ${gmp}/lib/libgmp.10.dylib \
diff --git a/pkgs/development/compilers/mlton/20210117-binary.nix b/pkgs/development/compilers/mlton/20210117-binary.nix
index d4e55d47b94c..40e9482ba1fb 100644
--- a/pkgs/development/compilers/mlton/20210117-binary.nix
+++ b/pkgs/development/compilers/mlton/20210117-binary.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
       throw "Architecture not supported";
 
   buildInputs = [ gmp ];
-  nativeBuildInputs = lib.optional stdenv.isLinux patchelf;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isLinux patchelf;
 
   buildPhase = ''
     make update \
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     make install PREFIX=$out
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --set-interpreter ${dynamic-linker} $out/lib/mlton/mlton-compile
     patchelf --set-rpath ${gmp}/lib $out/lib/mlton/mlton-compile
 
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
       patchelf --set-interpreter ${dynamic-linker} $out/bin/$e
       patchelf --set-rpath ${gmp}/lib $out/bin/$e
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change \
       /opt/local/lib/libgmp.10.dylib \
       ${gmp}/lib/libgmp.10.dylib \
diff --git a/pkgs/development/compilers/mono/4.nix b/pkgs/development/compilers/mono/4.nix
index 0b283d4f1778..8664cb3f7283 100644
--- a/pkgs/development/compilers/mono/4.nix
+++ b/pkgs/development/compilers/mono/4.nix
@@ -5,5 +5,5 @@ callPackage ./generic.nix ({
   version = "4.8.1.0";
   sha256 = "1vyvp2g28ihcgxgxr8nhzyzdmzicsh5djzk8dk1hj5p5f2k3ijqq";
   enableParallelBuilding = false; # #32386, https://hydra.nixos.org/build/65600645
-  extraPatches = lib.optionals stdenv.isLinux [ ./mono4-glibc.patch ];
+  extraPatches = lib.optionals stdenv.hostPlatform.isLinux [ ./mono4-glibc.patch ];
 })
diff --git a/pkgs/development/compilers/mono/generic.nix b/pkgs/development/compilers/mono/generic.nix
index 42c519e5021c..44fb05329030 100644
--- a/pkgs/development/compilers/mono/generic.nix
+++ b/pkgs/development/compilers/mono/generic.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     ncurses
     zlib
     bash
-  ] ++ lib.optionals stdenv.isDarwin [ Foundation libobjc ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation libobjc ];
 
   configureFlags = [
     "--x-includes=${libX11.dev}/include"
@@ -94,7 +94,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     # Per nixpkgs#151720 the build failures for aarch64-darwin are fixed since 6.12.0.129
-    broken = stdenv.isDarwin && stdenv.isAarch64 && lib.versionOlder version "6.12.0.129";
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 && lib.versionOlder version "6.12.0.129";
     homepage = "https://mono-project.com/";
     description = "Cross platform, open source .NET development framework";
     platforms = with platforms; darwin ++ linux;
diff --git a/pkgs/development/compilers/mono/llvm.nix b/pkgs/development/compilers/mono/llvm.nix
index c69a4021677e..a9b21845f46a 100644
--- a/pkgs/development/compilers/mono/llvm.nix
+++ b/pkgs/development/compilers/mono/llvm.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ perl groff libxml2 python2 libffi ] ++ lib.optional stdenv.isLinux valgrind;
+  buildInputs = [ perl groff libxml2 python2 libffi ] ++ lib.optional stdenv.hostPlatform.isLinux valgrind;
 
   propagatedBuildInputs = [ ncurses zlib ];
 
diff --git a/pkgs/development/compilers/mozart/default.nix b/pkgs/development/compilers/mozart/default.nix
index 8b66cbce688b..b82253d2b493 100644
--- a/pkgs/development/compilers/mozart/default.nix
+++ b/pkgs/development/compilers/mozart/default.nix
@@ -76,7 +76,7 @@ in stdenv.mkDerivation rec {
     homepage = "https://mozart.github.io";
     platforms = platforms.all;
     # Trace/BPT trap: 5
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
 }
diff --git a/pkgs/development/compilers/myrddin/default.nix b/pkgs/development/compilers/myrddin/default.nix
index b682b1e0ac54..e9369ef043e8 100644
--- a/pkgs/development/compilers/myrddin/default.nix
+++ b/pkgs/development/compilers/myrddin/default.nix
@@ -53,6 +53,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ luc65r ];
     platforms = platforms.all;
     # darwin: never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/myrddin.x86_64-darwin
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/compilers/neko/default.nix b/pkgs/development/compilers/neko/default.nix
index a0c888674016..7219d2b38097 100644
--- a/pkgs/development/compilers/neko/default.nix
+++ b/pkgs/development/compilers/neko/default.nix
@@ -25,8 +25,8 @@ stdenv.mkDerivation rec {
   buildInputs =
     [ boehmgc zlib sqlite pcre apacheHttpd apr aprutil
       libmysqlclient mbedtls_2 openssl libpthreadstubs ]
-      ++ lib.optional stdenv.isLinux gtk2
-      ++ lib.optionals stdenv.isDarwin [ pkgs.darwin.apple_sdk.frameworks.Security
+      ++ lib.optional stdenv.hostPlatform.isLinux gtk2
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.darwin.apple_sdk.frameworks.Security
                                                 pkgs.darwin.apple_sdk.frameworks.Carbon];
   cmakeFlags = [ "-DRUN_LDCONFIG=OFF" ];
   env = lib.optionalAttrs stdenv.cc.isClang {
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
 
   # Called from tools/test.neko line 2
   # Uncaught exception - Segmentation fault
-  doInstallCheck = !stdenv.isDarwin;
+  doInstallCheck = !stdenv.hostPlatform.isDarwin;
   dontPatchELF = true;
   dontStrip = true;
 
diff --git a/pkgs/development/compilers/nim/default.nix b/pkgs/development/compilers/nim/default.nix
index 4655cb03ad7b..68d9eedacc8d 100644
--- a/pkgs/development/compilers/nim/default.nix
+++ b/pkgs/development/compilers/nim/default.nix
@@ -85,7 +85,7 @@ in {
     };
 
     buildInputs = [ boehmgc openssl pcre readline sqlite ]
-      ++ lib.optional stdenv.isDarwin Security;
+      ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
     patches = [
       ./NIM_CONFIG_DIR.patch
@@ -124,9 +124,9 @@ in {
       "--os:${nimHost.os}"
       "-d:release"
       "-d:useGnuReadline"
-    ] ++ lib.optional (stdenv.isDarwin || stdenv.isLinux) "-d:nativeStacktrace";
+    ] ++ lib.optional (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isLinux) "-d:nativeStacktrace";
 
-    preBuild = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+    preBuild = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
       substituteInPlace makefile \
         --replace "aarch64" "arm64"
     '';
@@ -192,7 +192,7 @@ in {
 
         # Needed for any nim package that uses the standard library's
         # 'std/sysrand' module.
-        depsTargetTargetPropagated = lib.optional stdenv.isDarwin Security;
+        depsTargetTargetPropagated = lib.optional stdenv.hostPlatform.isDarwin Security;
 
         inherit patches;
 
@@ -252,7 +252,7 @@ in {
             runHook postBuild
           '';
 
-        wrapperArgs = lib.optionals (!(stdenv.isDarwin && stdenv.isAarch64)) [
+        wrapperArgs = lib.optionals (!(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) [
           "--prefix PATH : ${lib.makeBinPath [ buildPackages.gdb ]}:${
             placeholder "out"
           }/bin"
diff --git a/pkgs/development/compilers/ocaml/4.00.1.nix b/pkgs/development/compilers/ocaml/4.00.1.nix
index e4a4ed0f9580..c9b94abd2964 100644
--- a/pkgs/development/compilers/ocaml/4.00.1.nix
+++ b/pkgs/development/compilers/ocaml/4.00.1.nix
@@ -1,8 +1,8 @@
 { lib, stdenv, fetchurl, fetchpatch, ncurses, libX11 }:
 
 let
-   useX11 = !stdenv.isAarch32 && !stdenv.isMips;
-   useNativeCompilers = !stdenv.isMips;
+   useX11 = !stdenv.hostPlatform.isAarch32 && !stdenv.hostPlatform.isMips;
+   useNativeCompilers = !stdenv.hostPlatform.isMips;
    inherit (lib) optional optionals optionalString;
 in
 
diff --git a/pkgs/development/compilers/ocaml/ber-metaocaml.nix b/pkgs/development/compilers/ocaml/ber-metaocaml.nix
index 5279fc7481b6..b3bf5038702f 100644
--- a/pkgs/development/compilers/ocaml/ber-metaocaml.nix
+++ b/pkgs/development/compilers/ocaml/ber-metaocaml.nix
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
 
     branch          = baseOcamlBranch;
     platforms       = with platforms; linux ++ darwin;
-    broken          = stdenv.isAarch64 || stdenv.isMips;
+    broken          = stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isMips;
 
     longDescription = ''
       A simple extension of OCaml with the primitive type of code values, and
diff --git a/pkgs/development/compilers/ocaml/generic.nix b/pkgs/development/compilers/ocaml/generic.nix
index af07074eba1b..b40efbd32741 100644
--- a/pkgs/development/compilers/ocaml/generic.nix
+++ b/pkgs/development/compilers/ocaml/generic.nix
@@ -3,7 +3,7 @@
 let
   versionNoPatch = "${toString major_version}.${toString minor_version}";
   version = "${versionNoPatch}.${toString patch_version}";
-  safeX11 = stdenv: !(stdenv.isAarch32 || stdenv.isMips || stdenv.hostPlatform.isStatic);
+  safeX11 = stdenv: !(stdenv.hostPlatform.isAarch32 || stdenv.hostPlatform.isMips || stdenv.hostPlatform.isStatic);
 in
 
 { lib, stdenv, fetchurl, ncurses, buildEnv, libunwind, fetchpatch
@@ -30,7 +30,7 @@ let
 in
 
 let
-  useNativeCompilers = !stdenv.isMips;
+  useNativeCompilers = !stdenv.hostPlatform.isMips;
   inherit (lib) optional optionals optionalString strings concatStrings;
   pname = concatStrings [ "ocaml"
     (optionalString aflSupport "+afl")
@@ -84,7 +84,7 @@ stdenv.mkDerivation (args // {
   # `aarch64-apple-darwin-clang` while using assembler. However, such binary
   # does not exist. So, disable these configure flags on `aarch64-darwin`.
   # See #144785 for details.
-  configurePlatforms = lib.optionals (lib.versionAtLeast version "4.08" && !(stdenv.isDarwin && stdenv.isAarch64)) [ "host" "target" ];
+  configurePlatforms = lib.optionals (lib.versionAtLeast version "4.08" && !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) [ "host" "target" ];
   # x86_64-unknown-linux-musl-ld: -r and -pie may not be used together
   hardeningDisable = lib.optional (lib.versionAtLeast version "4.09" && stdenv.hostPlatform.isMusl) "pie"
     ++ lib.optional (lib.versionAtLeast version "5.0" && stdenv.cc.isClang) "strictoverflow"
@@ -114,7 +114,7 @@ stdenv.mkDerivation (args // {
   preConfigure = optionalString (lib.versionOlder version "4.04") ''
     CAT=$(type -tp cat)
     sed -e "s@/bin/cat@$CAT@" -i config/auto-aux/sharpbang
-  '' + optionalString (stdenv.isDarwin) ''
+  '' + optionalString (stdenv.hostPlatform.isDarwin) ''
     # Do what upstream does by default now: https://github.com/ocaml/ocaml/pull/10176
     # This is required for aarch64-darwin, everything else works as is.
     AS="${stdenv.cc}/bin/cc -c" ASPP="${stdenv.cc}/bin/cc -c"
@@ -157,7 +157,7 @@ stdenv.mkDerivation (args // {
     '';
 
     platforms = with platforms; linux ++ darwin;
-    broken = stdenv.isAarch64 && lib.versionOlder version (if stdenv.isDarwin then "4.10" else "4.02");
+    broken = stdenv.hostPlatform.isAarch64 && lib.versionOlder version (if stdenv.hostPlatform.isDarwin then "4.10" else "4.02");
   };
 
 })
diff --git a/pkgs/development/compilers/openjdk/11.nix b/pkgs/development/compilers/openjdk/11.nix
index 089e8411210c..a5110cb24d27 100644
--- a/pkgs/development/compilers/openjdk/11.nix
+++ b/pkgs/development/compilers/openjdk/11.nix
@@ -84,7 +84,7 @@ let
       # https://github.com/NixOS/nixpkgs/issues/150655#issuecomment-1935304859
       "--with-extra-cxxflags=-xc++"
     ]
-    ++ lib.optional stdenv.isx86_64 "--with-jvm-features=zgc"
+    ++ lib.optional stdenv.hostPlatform.isx86_64 "--with-jvm-features=zgc"
     ++ lib.optional headless "--enable-headless-only"
     ++ lib.optional (!headless && enableJavaFX) "--with-import-modules=${openjfx}";
 
diff --git a/pkgs/development/compilers/openjdk/21.nix b/pkgs/development/compilers/openjdk/21.nix
index 9c403fb2755d..7a650fa4a30f 100644
--- a/pkgs/development/compilers/openjdk/21.nix
+++ b/pkgs/development/compilers/openjdk/21.nix
@@ -98,7 +98,7 @@ let
       # https://github.com/NixOS/nixpkgs/issues/150655#issuecomment-1935304859
       "--with-extra-cxxflags=-xc++"
     ]
-    ++ lib.optional stdenv.isx86_64 "--with-jvm-features=zgc"
+    ++ lib.optional stdenv.hostPlatform.isx86_64 "--with-jvm-features=zgc"
     ++ lib.optional headless "--enable-headless-only"
     ++ lib.optional (!headless && enableJavaFX) "--with-import-modules=${openjfx}";
 
diff --git a/pkgs/development/compilers/orc/default.nix b/pkgs/development/compilers/orc/default.nix
index 18b99d5ba69a..dd71582bdfbd 100644
--- a/pkgs/development/compilers/orc/default.nix
+++ b/pkgs/development/compilers/orc/default.nix
@@ -25,7 +25,7 @@ in stdenv.mkDerivation rec {
     sha256 = "sha256-M+0jh/Sbgl+hucOwBy4F8lkUG4lUdK0IWuURQ9MEDMA=";
   };
 
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     # This benchmark times out on Hydra.nixos.org
     sed -i '/memcpy_speed/d' testsuite/meson.build
   '';
@@ -44,7 +44,7 @@ in stdenv.mkDerivation rec {
   ;
 
   # https://gitlab.freedesktop.org/gstreamer/orc/-/issues/41
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64 && stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "12");
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64 && stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "12");
 
   passthru.tests = {
     inherit (gst_all_1) gst-plugins-good gst-plugins-bad gst-plugins-ugly;
diff --git a/pkgs/development/compilers/osl/default.nix b/pkgs/development/compilers/osl/default.nix
index b7ad7537c7e1..0bba8266f094 100644
--- a/pkgs/development/compilers/osl/default.nix
+++ b/pkgs/development/compilers/osl/default.nix
@@ -68,7 +68,7 @@ in stdenv.mkDerivation rec {
     python3.pkgs.pybind11
     util-linux # needed just for hexdump
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libxml2
   ];
 
diff --git a/pkgs/development/compilers/polyml/5.6.nix b/pkgs/development/compilers/polyml/5.6.nix
index bcd52380701a..ee841882833c 100644
--- a/pkgs/development/compilers/polyml/5.6.nix
+++ b/pkgs/development/compilers/polyml/5.6.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation {
   pname = "polyml";
   inherit version;
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure.ac --replace stdc++ c++
   '';
 
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
     })
   ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin autoreconfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin autoreconfHook;
 
   src = fetchurl {
     url = "mirror://sourceforge/polyml/polyml.${version}.tar.gz";
diff --git a/pkgs/development/compilers/polyml/5.7.nix b/pkgs/development/compilers/polyml/5.7.nix
index f48377e0e0ac..471e8b2fd9f1 100644
--- a/pkgs/development/compilers/polyml/5.7.nix
+++ b/pkgs/development/compilers/polyml/5.7.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   pname = "polyml";
   version = "5.7.1";
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure.ac --replace stdc++ c++
   '';
 
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libffi gmp ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin autoreconfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin autoreconfHook;
 
   configureFlags = [
     "--enable-shared"
@@ -45,6 +45,6 @@ stdenv.mkDerivation rec {
     platforms = with platforms; (linux ++ darwin);
     maintainers = with maintainers; [ maggesi ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/compilers/polyml/default.nix b/pkgs/development/compilers/polyml/default.nix
index c82a88bb2793..067bdd018f27 100644
--- a/pkgs/development/compilers/polyml/default.nix
+++ b/pkgs/development/compilers/polyml/default.nix
@@ -17,13 +17,13 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-72wm8dt+Id59A5058mVE5P9TkXW5/LZRthZoxUustVA=";
   };
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure.ac --replace stdc++ c++
   '';
 
   buildInputs = [ libffi gmp ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin autoreconfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin autoreconfHook;
 
   configureFlags = [
     "--enable-shared"
diff --git a/pkgs/development/compilers/ponyc/default.nix b/pkgs/development/compilers/ponyc/default.nix
index b10739ca3363..ca23261a9865 100644
--- a/pkgs/development/compilers/ponyc/default.nix
+++ b/pkgs/development/compilers/ponyc/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (rec {
   };
 
   nativeBuildInputs = [ cmake makeWrapper which python3 ]
-    ++ lib.optionals (stdenv.isDarwin) [ cctools ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ cctools ];
   buildInputs = [ libxml2 z3 ];
 
   # Sandbox disallows network access, so disabling problematic networking tests
@@ -53,7 +53,7 @@ stdenv.mkDerivation (rec {
         hash = "sha256-/FWBSxZESwj/QvdNK5BI2EfonT64DP1eGBZR4O8uJww=";
       };
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (substituteAll {
       src = ./fix-darwin-build.patch;
       libSystem = darwin.Libsystem;
@@ -85,15 +85,15 @@ stdenv.mkDerivation (rec {
   makeFlags = [
     "PONYC_VERSION=${version}"
     "prefix=${placeholder "out"}"
-  ] ++ lib.optionals stdenv.isDarwin ([ "bits=64" ] ++ lib.optional (!lto) "lto=no");
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin ([ "bits=64" ] ++ lib.optional (!lto) "lto=no");
 
   env.NIX_CFLAGS_COMPILE = toString [ "-Wno-error=redundant-move" "-Wno-error=implicit-fallthrough" ];
 
   # make: *** [Makefile:222: test-full-programs-release] Killed: 9
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   installPhase = "make config=release prefix=$out "
-    + lib.optionalString stdenv.isDarwin ("bits=64 " + (lib.optionalString (!lto) "lto=no "))
+    + lib.optionalString stdenv.hostPlatform.isDarwin ("bits=64 " + (lib.optionalString (!lto) "lto=no "))
     + '' install
     wrapProgram $out/bin/ponyc \
       --prefix PATH ":" "${stdenv.cc}/bin" \
diff --git a/pkgs/development/compilers/purescript/psc-package/default.nix b/pkgs/development/compilers/purescript/psc-package/default.nix
index f0664df84dfe..99947491cde0 100644
--- a/pkgs/development/compilers/purescript/psc-package/default.nix
+++ b/pkgs/development/compilers/purescript/psc-package/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   version = "0.6.2";
 
-  src = if stdenv.isDarwin
+  src = if stdenv.hostPlatform.isDarwin
   then fetchurl {
     url = "https://github.com/purescript/psc-package/releases/download/v0.6.2/macos.tar.gz";
     sha256 = "17dh3bc5b6ahfyx0pi6n9qnrhsyi83qdynnca6k1kamxwjimpcq1";
@@ -34,12 +34,12 @@ stdenv.mkDerivation rec {
 
     install -D -m555 -T psc-package $PSC_PACKAGE
     chmod u+w $PSC_PACKAGE
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool \
       -change /usr/lib/libSystem.B.dylib ${darwin.Libsystem}/lib/libSystem.B.dylib \
       -change /usr/lib/libiconv.2.dylib ${libiconv}/libiconv.2.dylib \
       $PSC_PACKAGE
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     patchelf --interpreter ${dynamic-linker} --set-rpath ${libPath} $PSC_PACKAGE
   '' + ''
     chmod u-w $PSC_PACKAGE
diff --git a/pkgs/development/compilers/purescript/purescript/default.nix b/pkgs/development/compilers/purescript/purescript/default.nix
index 61a8c3a5c5bd..8f88fed052ee 100644
--- a/pkgs/development/compilers/purescript/purescript/default.nix
+++ b/pkgs/development/compilers/purescript/purescript/default.nix
@@ -7,7 +7,7 @@ let
   dynamic-linker = stdenv.cc.bintools.dynamicLinker;
 
   patchelf = libPath :
-    lib.optionalString (!stdenv.isDarwin) ''
+    lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
           chmod u+w $PURS
           patchelf --interpreter ${dynamic-linker} --set-rpath ${libPath} $PURS
           chmod u-w $PURS
diff --git a/pkgs/development/compilers/rust/1_80.nix b/pkgs/development/compilers/rust/1_80.nix
index 4c2efcc367f4..fe301144afff 100644
--- a/pkgs/development/compilers/rust/1_80.nix
+++ b/pkgs/development/compilers/rust/1_80.nix
@@ -88,7 +88,7 @@ import ./default.nix
                 allowedRequisites = null;
                 cc = llvmPackages.clangNoLibcxx;
                 hostPlatform = stdenv.hostPlatform // {
-                  useLLVM = !stdenv.isDarwin;
+                  useLLVM = !stdenv.hostPlatform.isDarwin;
                 };
               };
               inherit libunwind;
diff --git a/pkgs/development/compilers/rust/binary.nix b/pkgs/development/compilers/rust/binary.nix
index 10e944515df7..6d31f1af55af 100644
--- a/pkgs/development/compilers/rust/binary.nix
+++ b/pkgs/development/compilers/rust/binary.nix
@@ -33,11 +33,11 @@ rec {
       license = [ licenses.mit licenses.asl20 ];
     };
 
-    nativeBuildInputs = lib.optional (!stdenv.isDarwin) autoPatchelfHook;
+    nativeBuildInputs = lib.optional (!stdenv.hostPlatform.isDarwin) autoPatchelfHook;
     buildInputs = [ bash ]
-      ++ lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) gcc.cc.lib
-      ++ lib.optional (!stdenv.isDarwin) zlib
-      ++ lib.optional stdenv.isDarwin Security;
+      ++ lib.optional (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isFreeBSD) gcc.cc.lib
+      ++ lib.optional (!stdenv.hostPlatform.isDarwin) zlib
+      ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
     postPatch = ''
       patchShebangs .
@@ -80,10 +80,10 @@ rec {
     };
 
     nativeBuildInputs = [ makeWrapper ]
-      ++ lib.optional (!stdenv.isDarwin) autoPatchelfHook;
+      ++ lib.optional (!stdenv.hostPlatform.isDarwin) autoPatchelfHook;
     buildInputs = [ bash ]
-      ++ lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) gcc.cc.lib
-      ++ lib.optional stdenv.isDarwin Security;
+      ++ lib.optional (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isFreeBSD) gcc.cc.lib
+      ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
     postPatch = ''
       patchShebangs .
diff --git a/pkgs/development/compilers/rust/cargo.nix b/pkgs/development/compilers/rust/cargo.nix
index 9a12537f3e32..6ece7c304fc5 100644
--- a/pkgs/development/compilers/rust/cargo.nix
+++ b/pkgs/development/compilers/rust/cargo.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage.override {
     zlib
   ];
   buildInputs = [ file curl python3 openssl zlib ]
-    ++ lib.optionals stdenv.isDarwin [ CoreFoundation Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation Security ];
 
   # cargo uses git-rs which is made for a version of libgit2 from recent master that
   # is not compatible with the current version in nixpkgs.
diff --git a/pkgs/development/compilers/rust/clippy.nix b/pkgs/development/compilers/rust/clippy.nix
index 640ea7908e25..6a233ffe1852 100644
--- a/pkgs/development/compilers/rust/clippy.nix
+++ b/pkgs/development/compilers/rust/clippy.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage {
   dontUpdateAutotoolsGnuConfigScripts = true;
 
   buildInputs = [ rustc.llvm ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   # fixes: error: the option `Z` is only accepted on the nightly compiler
   RUSTC_BOOTSTRAP = 1;
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage {
   #
   # [0]: https://github.com/rust-lang/rust/blob/f77f4d55bdf9d8955d3292f709bd9830c2fdeca5/src/bootstrap/builder.rs#L1543
   # [1]: https://github.com/rust-lang/rust/blob/f77f4d55bdf9d8955d3292f709bd9830c2fdeca5/compiler/rustc_codegen_ssa/src/back/linker.rs#L323-L331
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath "${rustc.unwrapped}/lib" "$out/bin/clippy-driver"
     install_name_tool -add_rpath "${rustc.unwrapped}/lib" "$out/bin/cargo-clippy"
   '';
diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 1b8a3dbfba6b..c8eb3f438e99 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -68,13 +68,13 @@ in stdenv.mkDerivation (finalAttrs: {
        # when linking stage1 libstd: cc: undefined reference to `__cxa_begin_catch'
        # This doesn't apply to cross-building for FreeBSD because the host
        # uses libstdc++, but the target (used for building std) uses libc++
-      optional (stdenv.isLinux && !withBundledLLVM && !stdenv.targetPlatform.isFreeBSD && !useLLVM)
+      optional (stdenv.hostPlatform.isLinux && !withBundledLLVM && !stdenv.targetPlatform.isFreeBSD && !useLLVM)
         "--push-state --as-needed -lstdc++ --pop-state"
-    ++ optional (stdenv.isLinux && !withBundledLLVM && !stdenv.targetPlatform.isFreeBSD && useLLVM)
+    ++ optional (stdenv.hostPlatform.isLinux && !withBundledLLVM && !stdenv.targetPlatform.isFreeBSD && useLLVM)
         "--push-state --as-needed -L${llvmPackages.libcxx}/lib -lc++ -lc++abi -lLLVM-${lib.versions.major llvmPackages.llvm.version} --pop-state"
-    ++ optional (stdenv.isDarwin && !withBundledLLVM) "-lc++ -lc++abi"
-    ++ optional stdenv.isFreeBSD "-rpath ${llvmPackages.libunwind}/lib"
-    ++ optional stdenv.isDarwin "-rpath ${llvmSharedForHost.lib}/lib");
+    ++ optional (stdenv.hostPlatform.isDarwin && !withBundledLLVM) "-lc++ -lc++abi"
+    ++ optional stdenv.hostPlatform.isFreeBSD "-rpath ${llvmPackages.libunwind}/lib"
+    ++ optional stdenv.hostPlatform.isDarwin "-rpath ${llvmSharedForHost.lib}/lib");
 
   # Increase codegen units to introduce parallelism within the compiler.
   RUSTFLAGS = "-Ccodegen-units=10";
@@ -166,7 +166,7 @@ in stdenv.mkDerivation (finalAttrs: {
     "${setTarget}.musl-root=${pkgsBuildTarget.targetPackages.stdenv.cc.libc}"
   ] ++ optionals stdenv.targetPlatform.rust.isNoStdTarget [
     "--disable-docs"
-  ] ++ optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # https://github.com/rust-lang/rust/issues/92173
     "--set rust.jemalloc"
   ] ++ optionals useLLVM [
@@ -224,7 +224,7 @@ in stdenv.mkDerivation (finalAttrs: {
 
     # Useful debugging parameter
     # export VERBOSE=1
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     # See https://github.com/jemalloc/jemalloc/issues/1997
     # Using a value of 48 should work on both emulated and native x86_64-darwin.
     export JEMALLOC_SYS_WITH_LG_VADDR=48
@@ -236,7 +236,7 @@ in stdenv.mkDerivation (finalAttrs: {
     [source.vendored-sources]
     directory = "vendor"
     EOF
-  '' + lib.optionalString (stdenv.isFreeBSD) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isFreeBSD) ''
     # lzma-sys bundles an old version of xz that doesn't build
     # on modern FreeBSD, use the system one instead
     substituteInPlace src/bootstrap/src/core/build_steps/tool.rs \
@@ -257,7 +257,7 @@ in stdenv.mkDerivation (finalAttrs: {
     ++ optionals fastCross [ lndir makeWrapper ];
 
   buildInputs = [ openssl ]
-    ++ optionals stdenv.isDarwin [ libiconv Security zlib ]
+    ++ optionals stdenv.hostPlatform.isDarwin [ libiconv Security zlib ]
     ++ optional (!withBundledLLVM) llvmShared.lib
     ++ optional (useLLVM && !withBundledLLVM) [
       llvmPackages.libunwind
diff --git a/pkgs/development/compilers/rust/rustfmt.nix b/pkgs/development/compilers/rust/rustfmt.nix
index ab58a172a6b2..42c71513151a 100644
--- a/pkgs/development/compilers/rust/rustfmt.nix
+++ b/pkgs/development/compilers/rust/rustfmt.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     rustc.llvm
-  ] ++ lib.optional stdenv.isDarwin Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # rustfmt uses the rustc_driver and std private libraries, and Rust's build process forces them to have
   # an install name of `@rpath/...` [0] [1] instead of the standard on macOS, which is an absolute path
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
   #
   # [0]: https://github.com/rust-lang/rust/blob/f77f4d55bdf9d8955d3292f709bd9830c2fdeca5/src/bootstrap/builder.rs#L1543
   # [1]: https://github.com/rust-lang/rust/blob/f77f4d55bdf9d8955d3292f709bd9830c2fdeca5/compiler/rustc_codegen_ssa/src/back/linker.rs#L323-L331
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath "${rustc.unwrapped}/lib" "$out/bin/rustfmt"
     install_name_tool -add_rpath "${rustc.unwrapped}/lib" "$out/bin/git-rustfmt"
   '';
diff --git a/pkgs/development/compilers/sagittarius-scheme/default.nix b/pkgs/development/compilers/sagittarius-scheme/default.nix
index 0b4cc240694c..3877d752f795 100644
--- a/pkgs/development/compilers/sagittarius-scheme/default.nix
+++ b/pkgs/development/compilers/sagittarius-scheme/default.nix
@@ -6,12 +6,12 @@
 , boehmgc
 , openssl
 , zlib
-, odbcSupport ? !stdenv.isDarwin
+, odbcSupport ? !stdenv.hostPlatform.isDarwin
 , libiodbc
 }:
 
-let platformLdLibraryPath = if stdenv.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH"
-                            else if (stdenv.isLinux or stdenv.isBSD) then "LD_LIBRARY_PATH"
+let platformLdLibraryPath = if stdenv.hostPlatform.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH"
+                            else if (stdenv.hostPlatform.isLinux or stdenv.hostPlatform.isBSD) then "LD_LIBRARY_PATH"
                             else throw "unsupported platform";
 in
 stdenv.mkDerivation rec {
@@ -31,9 +31,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libffi boehmgc openssl zlib ] ++ lib.optional odbcSupport libiodbc;
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=int-conversion"
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # error: '__builtin_ia32_aeskeygenassist128' needs target feature aes
     "-maes"
   ]);
diff --git a/pkgs/development/compilers/sbcl/bootstrap.nix b/pkgs/development/compilers/sbcl/bootstrap.nix
index d796b24e1d7e..6f9b75c1183c 100644
--- a/pkgs/development/compilers/sbcl/bootstrap.nix
+++ b/pkgs/development/compilers/sbcl/bootstrap.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
       --add-flags "--core $out/share/sbcl/sbcl.core"
   '';
 
-  postFixup = lib.optionalString (!stdenv.isAarch32 && stdenv.isLinux) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isAarch32 && stdenv.hostPlatform.isLinux) ''
     patchelf --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) $out/share/sbcl/sbcl
   '';
 
diff --git a/pkgs/development/compilers/sbcl/default.nix b/pkgs/development/compilers/sbcl/default.nix
index 5cc21ada71a1..e6724a19d3b2 100644
--- a/pkgs/development/compilers/sbcl/default.nix
+++ b/pkgs/development/compilers/sbcl/default.nix
@@ -167,7 +167,7 @@ stdenv.mkDerivation (self: {
     lib.optional self.threadSupport "sb-thread" ++
     lib.optional self.linkableRuntime "sb-linkable-runtime" ++
     lib.optional self.coreCompression "sb-core-compression" ++
-    lib.optional stdenv.isAarch32 "arm" ++
+    lib.optional stdenv.hostPlatform.isAarch32 "arm" ++
     lib.optional self.markRegionGC "mark-region-gc";
 
   disableFeatures =
diff --git a/pkgs/development/compilers/scryer-prolog/default.nix b/pkgs/development/compilers/scryer-prolog/default.nix
index 245d48d1a595..58a853e66d88 100644
--- a/pkgs/development/compilers/scryer-prolog/default.nix
+++ b/pkgs/development/compilers/scryer-prolog/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-                ++ lib.optionals stdenv.isDarwin [
+                ++ lib.optionals stdenv.hostPlatform.isDarwin [
                   darwin.apple_sdk.frameworks.SystemConfiguration
                 ];
 
diff --git a/pkgs/development/compilers/shaderc/default.nix b/pkgs/development/compilers/shaderc/default.nix
index 968a3014fa40..97c50cde91e7 100644
--- a/pkgs/development/compilers/shaderc/default.nix
+++ b/pkgs/development/compilers/shaderc/default.nix
@@ -45,8 +45,8 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ cmake python3 ]
-    ++ lib.optionals stdenv.isDarwin [ cctools ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ];
 
   postInstall = ''
     moveToOutput "lib/*.a" $static
diff --git a/pkgs/development/compilers/smlnj/default.nix b/pkgs/development/compilers/smlnj/default.nix
index 26efb81e1686..000c59d67a38 100644
--- a/pkgs/development/compilers/smlnj/default.nix
+++ b/pkgs/development/compilers/smlnj/default.nix
@@ -3,7 +3,7 @@ let
   version = "110.95";
   baseurl = "http://smlnj.cs.uchicago.edu/dist/working/${version}";
 
-  arch = if stdenv.is64bit
+  arch = if stdenv.hostPlatform.is64bit
     then "64"
     else "32";
 
@@ -12,7 +12,7 @@ let
   boot64 = { url = "${baseurl}/boot.amd64-unix.tgz";
              sha256 = "1zn96a83kb6bn6228yfjsvb58m2qxw9k4j3qz0p9c8za479w4ch6"; };
 
-  bootBinary = if stdenv.is64bit
+  bootBinary = if stdenv.hostPlatform.is64bit
                then boot64
                else boot32;
 
@@ -51,7 +51,7 @@ in stdenv.mkDerivation {
     sed -i '/PATH=/d' config/_arch-n-opsys base/runtime/config/gen-posix-names.sh
     echo SRCARCHIVEURL="file:/$TMP" > config/srcarchiveurl
     patch --verbose config/_heap2exec ${./heap2exec.diff}
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Locate standard headers like <unistd.h>
     substituteInPlace base/runtime/config/gen-posix-names.sh \
       --replace "\$SDK_PATH/usr" "${Libsystem}"
@@ -89,6 +89,6 @@ in stdenv.mkDerivation {
     maintainers = with maintainers; [ thoughtpolice ];
     mainProgram = "sml";
     # never built on x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/development/compilers/solc/default.nix b/pkgs/development/compilers/solc/default.nix
index 2147d59ffd93..73476c939ce8 100644
--- a/pkgs/development/compilers/solc/default.nix
+++ b/pkgs/development/compilers/solc/default.nix
@@ -8,7 +8,7 @@
 , python3
 , z3Support ? true
 , z3_4_11 ? null
-, cvc4Support ? gccStdenv.isLinux
+, cvc4Support ? gccStdenv.hostPlatform.isLinux
 , cvc4 ? null
 , cln ? null
 , gmp ? null
@@ -52,7 +52,7 @@ let
     maintainers = with maintainers; [ dbrock akru lionello sifmelcara ];
   };
 
-  solc = if gccStdenv.isLinux then gccStdenv.mkDerivation rec {
+  solc = if gccStdenv.hostPlatform.isLinux then gccStdenv.mkDerivation rec {
     inherit pname version meta;
 
     # upstream suggests avoid using archive generated by github
diff --git a/pkgs/development/compilers/souffle/default.nix b/pkgs/development/compilers/souffle/default.nix
index b851ac2c1403..f279ce475a4e 100644
--- a/pkgs/development/compilers/souffle/default.nix
+++ b/pkgs/development/compilers/souffle/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
     ./includes.patch
   ];
 
-  hardeningDisable = lib.optionals stdenv.isDarwin [ "strictoverflow" ];
+  hardeningDisable = lib.optionals stdenv.hostPlatform.isDarwin [ "strictoverflow" ];
 
   nativeBuildInputs = [ bison cmake flex mcpp doxygen graphviz makeWrapper perl ];
   buildInputs = [ bash-completion ncurses zlib sqlite libffi python3 ];
diff --git a/pkgs/development/compilers/spirv-llvm-translator/default.nix b/pkgs/development/compilers/spirv-llvm-translator/default.nix
index 20adaf5f559b..89e4452e7d4b 100644
--- a/pkgs/development/compilers/spirv-llvm-translator/default.nix
+++ b/pkgs/development/compilers/spirv-llvm-translator/default.nix
@@ -105,7 +105,7 @@ stdenv.mkDerivation {
 
   postInstall = ''
     install -D tools/llvm-spirv/llvm-spirv $out/bin/llvm-spirv
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool $out/bin/llvm-spirv \
       -change @rpath/libLLVMSPIRVLib.dylib $out/lib/libLLVMSPIRVLib.dylib
   '';
diff --git a/pkgs/development/compilers/swi-prolog/default.nix b/pkgs/development/compilers/swi-prolog/default.nix
index 628e69eb5bc9..c104cca2cfdb 100644
--- a/pkgs/development/compilers/swi-prolog/default.nix
+++ b/pkgs/development/compilers/swi-prolog/default.nix
@@ -74,7 +74,7 @@ let
   packInstall = swiplPath: pack:
     ''${swiplPath}/bin/swipl -g "pack_install(${pack}, [package_directory(\"${swiplPath}/lib/swipl/extra-pack\"), silent(true), interactive(false)])." -t "halt."
     '';
-  withGui' = withGui && !stdenv.isDarwin;
+  withGui' = withGui && !stdenv.hostPlatform.isDarwin;
   optionalDependencies = []
                          ++ (lib.optional withDb db)
                          ++ (lib.optional withJava jdk)
@@ -85,7 +85,7 @@ let
                          ++ (lib.optionals withGui' [ libXt libXext libXpm libXft libXinerama
                                                       libjpeg libSM freetype fontconfig
                                                     ])
-                         ++ (lib.optional stdenv.isDarwin Security)
+                         ++ (lib.optional stdenv.hostPlatform.isDarwin Security)
                          ++ extraLibraries';
 in
 stdenv.mkDerivation {
@@ -126,8 +126,8 @@ stdenv.mkDerivation {
   cmakeFlags = [ "-DSWIPL_INSTALL_IN_LIB=ON" ]
                ++ lib.optionals (!withNativeCompiler) [
                  # without these options, the build will embed full compiler paths
-                 "-DSWIPL_CC=${if stdenv.isDarwin then "clang" else "gcc"}"
-                 "-DSWIPL_CXX=${if stdenv.isDarwin then "clang++" else "g++"}"
+                 "-DSWIPL_CC=${if stdenv.hostPlatform.isDarwin then "clang" else "gcc"}"
+                 "-DSWIPL_CXX=${if stdenv.hostPlatform.isDarwin then "clang++" else "g++"}"
                ];
 
   preInstall = ''
diff --git a/pkgs/development/compilers/swift/compiler/default.nix b/pkgs/development/compilers/swift/compiler/default.nix
index d3e2017958fd..c74ee850f4a5 100644
--- a/pkgs/development/compilers/swift/compiler/default.nix
+++ b/pkgs/development/compilers/swift/compiler/default.nix
@@ -50,7 +50,7 @@ let
   sources = callPackage ../sources.nix { };
 
   # Tools invoked by swift at run-time.
-  runtimeDeps = lib.optionals stdenv.isDarwin [
+  runtimeDeps = lib.optionals stdenv.hostPlatform.isDarwin [
     # libtool is used for static linking. This is part of cctools, but adding
     # that as a build input puts an unwrapped linker in PATH, and breaks
     # builds. This small derivation exposes just libtool.
@@ -78,7 +78,7 @@ let
     else targetPlatform.parsed.kernel.name;
 
   # Apple Silicon uses a different CPU name in the target triple.
-  swiftArch = if stdenv.isDarwin && stdenv.isAarch64 then "arm64"
+  swiftArch = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 then "arm64"
     else targetPlatform.parsed.cpu.name;
 
   # On Darwin, a `.swiftmodule` is a subdirectory in `lib/swift/<OS>`,
@@ -109,7 +109,7 @@ let
     "toolchain-tools"
     "toolchain-dev-tools"
     "license"
-    (if stdenv.isDarwin then "sourcekit-xpc-service" else "sourcekit-inproc")
+    (if stdenv.hostPlatform.isDarwin then "sourcekit-xpc-service" else "sourcekit-inproc")
     "swift-remote-mirror"
     "swift-remote-mirror-headers"
   ];
@@ -205,7 +205,7 @@ in stdenv.mkDerivation {
     makeClangWrapper
     makeSwiftcWrapper
   ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       xcbuild
       sigtool # codesign
       DarwinTools # sw_vers
@@ -218,10 +218,10 @@ in stdenv.mkDerivation {
     swig
     libxml2
   ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       libuuid
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreServices
       Foundation
       Combine
@@ -262,7 +262,7 @@ in stdenv.mkDerivation {
     ${copySource "swift-experimental-string-processing"}
     ${copySource "swift-syntax"}
     ${lib.optionalString
-      (!stdenv.isDarwin)
+      (!stdenv.hostPlatform.isDarwin)
       (copySource "swift-corelibs-libdispatch")}
 
     chmod -R u+w .
@@ -272,7 +272,7 @@ in stdenv.mkDerivation {
     # Just patch all the things for now, we can focus this later.
     # TODO: eliminate use of env.
     find -type f -print0 | xargs -0 sed -i \
-    ${lib.optionalString stdenv.isDarwin
+    ${lib.optionalString stdenv.hostPlatform.isDarwin
       "-e 's|/usr/libexec/PlistBuddy|${xcbuild}/bin/PlistBuddy|g'"} \
       -e 's|/usr/bin/env|${coreutils}/bin/env|g' \
       -e 's|/usr/bin/make|${gnumake}/bin/make|g' \
@@ -345,7 +345,7 @@ in stdenv.mkDerivation {
       hash = "sha256-nkRPWx8gNvYr7mlvEUiOAb1rTrf+skCZjAydJVUHrcI=";
     }}
 
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace llvm-project/clang/lib/Driver/ToolChains/Linux.cpp \
       --replace 'SysRoot + "/lib' '"${glibc}/lib" "' \
       --replace 'SysRoot + "/usr/lib' '"${glibc}/lib" "' \
@@ -384,7 +384,7 @@ in stdenv.mkDerivation {
 
     patchShebangs .
 
-    ${lib.optionalString (!stdenv.isDarwin) ''
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # NOTE: This interferes with ABI stability on Darwin, which uses the system
     # libraries in the hardcoded path /usr/lib/swift.
     fixCmakeFiles .
@@ -392,7 +392,7 @@ in stdenv.mkDerivation {
   '';
 
   # > clang-15-unwrapped: error: unsupported option '-fzero-call-used-regs=used-gpr' for target 'arm64-apple-macosx10.9.0'
-  hardeningDisable = lib.optional stdenv.isAarch64 "zerocallusedregs";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isAarch64 "zerocallusedregs";
 
   configurePhase = ''
     export SWIFT_SOURCE_ROOT="$PWD"
@@ -451,7 +451,7 @@ in stdenv.mkDerivation {
     "
     buildProject llvm llvm-project/llvm
 
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Add appleSwiftCore to the search paths. We can't simply add it to
     # buildInputs, because it is potentially an older stdlib than the one we're
     # building. We have to remove it again after the main Swift build, or later
@@ -477,7 +477,7 @@ in stdenv.mkDerivation {
     #   Fixed in: https://github.com/apple/swift/commit/84083afef1de5931904d5c815d53856cdb3fb232
     cmakeFlags="
       -GNinja
-      -DBOOTSTRAPPING_MODE=BOOTSTRAPPING${lib.optionalString stdenv.isDarwin "-WITH-HOSTLIBS"}
+      -DBOOTSTRAPPING_MODE=BOOTSTRAPPING${lib.optionalString stdenv.hostPlatform.isDarwin "-WITH-HOSTLIBS"}
       -DSWIFT_ENABLE_EXPERIMENTAL_DIFFERENTIABLE_PROGRAMMING=ON
       -DSWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY=ON
       -DSWIFT_ENABLE_EXPERIMENTAL_DISTRIBUTED=ON
@@ -490,11 +490,11 @@ in stdenv.mkDerivation {
       -DSWIFT_PATH_TO_SWIFT_SYNTAX_SOURCE=$SWIFT_SOURCE_ROOT/swift-syntax
       -DSWIFT_PATH_TO_STRING_PROCESSING_SOURCE=$SWIFT_SOURCE_ROOT/swift-experimental-string-processing
       -DSWIFT_INSTALL_COMPONENTS=${lib.concatStringsSep ";" swiftInstallComponents}
-      -DSWIFT_STDLIB_ENABLE_OBJC_INTEROP=${if stdenv.isDarwin then "ON" else "OFF"}
+      -DSWIFT_STDLIB_ENABLE_OBJC_INTEROP=${if stdenv.hostPlatform.isDarwin then "ON" else "OFF"}
     "
     buildProject swift
 
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Restore search paths to remove appleSwiftCore.
     export NIX_SWIFTFLAGS_COMPILE="$OLD_NIX_SWIFTFLAGS_COMPILE"
     export NIX_LDFLAGS="$OLD_NIX_LDFLAGS"
@@ -526,18 +526,18 @@ in stdenv.mkDerivation {
       -DLLDB_ENABLE_LUA=OFF
       -DLLDB_INCLUDE_TESTS=OFF
       -DCMAKE_BUILD_WITH_INSTALL_NAME_DIR=ON
-      ${lib.optionalString stdenv.isDarwin ''
+      ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       -DLLDB_USE_SYSTEM_DEBUGSERVER=ON
       ''}
       -DLibEdit_INCLUDE_DIRS=${libedit.dev}/include
       -DLibEdit_LIBRARIES=${libedit}/lib/libedit${stdenv.hostPlatform.extensions.sharedLibrary}
-      -DCURSES_INCLUDE_DIRS=${if stdenv.isDarwin then "/var/empty" else ncurses.dev}/include
+      -DCURSES_INCLUDE_DIRS=${if stdenv.hostPlatform.isDarwin then "/var/empty" else ncurses.dev}/include
       -DCURSES_LIBRARIES=${ncurses}/lib/libncurses${stdenv.hostPlatform.extensions.sharedLibrary}
       -DPANEL_LIBRARIES=${ncurses}/lib/libpanel${stdenv.hostPlatform.extensions.sharedLibrary}
     ";
     buildProject lldb llvm-project/lldb
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Need to do a standalone build of concurrency for Darwin back deployment.
     # Based on: utils/swift_build_support/swift_build_support/products/backdeployconcurrency.py
     cmakeFlags="
@@ -641,7 +641,7 @@ in stdenv.mkDerivation {
     cd $SWIFT_BUILD_ROOT/swift
     ninjaInstallPhase
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
     cd $SWIFT_BUILD_ROOT/swift-concurrency-backdeploy
     installTargets=install-back-deployment
     ninjaInstallPhase
@@ -669,20 +669,20 @@ in stdenv.mkDerivation {
     mkdir $lib/lib/swift/clang
     cp -P ${clang}/resource-root/* $lib/lib/swift/clang/
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Install required library for ObjC interop.
     # TODO: Is there no source code for this available?
     cp -r ${CLTools_Executables}/usr/lib/arc $out/lib/arc
     ''}
   '';
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     # This is cheesy, but helps the patchelf hook remove /build from RPATH.
     cd $SWIFT_BUILD_ROOT/..
     mv build buildx
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # These libraries need to use the system install name. The official SDK
     # does the same (as opposed to using rpath). Presumably, they are part of
     # the stable ABI. Not using the system libraries at run-time is known to
diff --git a/pkgs/development/compilers/swift/default.nix b/pkgs/development/compilers/swift/default.nix
index e55465e952d5..76db695b08c3 100644
--- a/pkgs/development/compilers/swift/default.nix
+++ b/pkgs/development/compilers/swift/default.nix
@@ -25,7 +25,7 @@ let
     #
     # The following selects the correct Clang version, matching the version
     # used in Swift, and applies the same libc overrides as `apple_sdk.stdenv`.
-    clang = if pkgs.stdenv.isDarwin
+    clang = if pkgs.stdenv.hostPlatform.isDarwin
       then
         swiftLlvmPackages.clang.override rec {
           libc = apple_sdk.Libsystem;
@@ -68,11 +68,11 @@ let
       useSwiftDriver = false;
     };
 
-    Dispatch = if stdenv.isDarwin
+    Dispatch = if stdenv.hostPlatform.isDarwin
       then null # part of libsystem
       else callPackage ./libdispatch { swift = swiftNoSwiftDriver; };
 
-    Foundation = if stdenv.isDarwin
+    Foundation = if stdenv.hostPlatform.isDarwin
       then apple_sdk.frameworks.Foundation
       else callPackage ./foundation { swift = swiftNoSwiftDriver; };
 
diff --git a/pkgs/development/compilers/swift/sourcekit-lsp/default.nix b/pkgs/development/compilers/swift/sourcekit-lsp/default.nix
index f0c08a41e43e..2d1cd6dd0440 100644
--- a/pkgs/development/compilers/swift/sourcekit-lsp/default.nix
+++ b/pkgs/development/compilers/swift/sourcekit-lsp/default.nix
@@ -21,7 +21,7 @@ let
   # are part of libsystem. Adding its headers to the search path causes strange
   # mixing and errors.
   # TODO: Find a better way to prevent this conflict.
-  ncursesInput = if stdenv.isDarwin then ncurses.out else ncurses;
+  ncursesInput = if stdenv.hostPlatform.isDarwin then ncurses.out else ncurses;
 in
 stdenv.mkDerivation {
   pname = "sourcekit-lsp";
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
     XCTest
     sqlite
     ncursesInput
-  ] ++ lib.optionals stdenv.isDarwin [ CryptoKit LocalAuthentication ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CryptoKit LocalAuthentication ];
 
   configurePhase = generated.configure + ''
     swiftpmMakeMutable indexstore-db
diff --git a/pkgs/development/compilers/swift/swift-docc/default.nix b/pkgs/development/compilers/swift/swift-docc/default.nix
index 2645f07aa4ec..13595882241b 100644
--- a/pkgs/development/compilers/swift/swift-docc/default.nix
+++ b/pkgs/development/compilers/swift/swift-docc/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ swift swiftpm ];
   buildInputs = [ Foundation XCTest ]
-    ++ lib.optionals stdenv.isDarwin [ CryptoKit LocalAuthentication ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CryptoKit LocalAuthentication ];
 
   configurePhase = generated.configure;
 
diff --git a/pkgs/development/compilers/swift/swift-driver/default.nix b/pkgs/development/compilers/swift/swift-driver/default.nix
index ca2b88046c86..03c7898fe112 100644
--- a/pkgs/development/compilers/swift/swift-driver/default.nix
+++ b/pkgs/development/compilers/swift/swift-driver/default.nix
@@ -19,7 +19,7 @@ let
   # are part of libsystem. Adding its headers to the search path causes strange
   # mixing and errors.
   # TODO: Find a better way to prevent this conflict.
-  ncursesInput = if stdenv.isDarwin then ncurses.out else ncurses;
+  ncursesInput = if stdenv.hostPlatform.isDarwin then ncurses.out else ncurses;
 in
 stdenv.mkDerivation {
   pname = "swift-driver";
diff --git a/pkgs/development/compilers/swift/swiftpm/default.nix b/pkgs/development/compilers/swift/swiftpm/default.nix
index 712bc01777a5..b8d8d2fe7bba 100644
--- a/pkgs/development/compilers/swift/swiftpm/default.nix
+++ b/pkgs/development/compilers/swift/swiftpm/default.nix
@@ -81,7 +81,7 @@ let
 
   # Tools invoked by swiftpm at run-time.
   runtimeDeps = [ git ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       xcbuild.xcrun
       # These tools are part of cctools, but adding that as a build input puts
       # an unwrapped linker in PATH, and breaks builds. This small derivation
@@ -99,13 +99,13 @@ let
   mkBootstrapDerivation = attrs: stdenv.mkDerivation (attrs // {
     nativeBuildInputs = (attrs.nativeBuildInputs or [ ])
       ++ [ cmake ninja swift ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
 
     buildInputs = (attrs.buildInputs or [ ])
       ++ [ Foundation ];
 
     postPatch = (attrs.postPatch or "")
-      + lib.optionalString stdenv.isDarwin ''
+      + lib.optionalString stdenv.hostPlatform.isDarwin ''
         # On Darwin only, Swift uses arm64 as cpu arch.
         if [ -e cmake/modules/SwiftSupport.cmake ]; then
           substituteInPlace cmake/modules/SwiftSupport.cmake \
@@ -121,7 +121,7 @@ let
       '';
 
     postInstall = (attrs.postInstall or "")
-      + lib.optionalString stdenv.isDarwin ''
+      + lib.optionalString stdenv.hostPlatform.isDarwin ''
         # The install name of libraries is incorrectly set to lib/ (via our
         # CMake setup hook) instead of lib/swift/. This'd be easily fixed by
         # fixDarwinDylibNames, but some builds create libraries that reference
@@ -149,7 +149,7 @@ let
   # are part of libsystem. Adding its headers to the search path causes strange
   # mixing and errors.
   # TODO: Find a better way to prevent this conflict.
-  ncursesInput = if stdenv.isDarwin then ncurses.out else ncurses;
+  ncursesInput = if stdenv.hostPlatform.isDarwin then ncurses.out else ncurses;
 
   # Derivations for bootstrapping dependencies using CMake.
   # This is based on the `swiftpm/Utilities/bootstrap` script.
@@ -168,7 +168,7 @@ let
     src = generated.sources.swift-system;
 
     postInstall = cmakeGlue.SwiftSystem
-      + lib.optionalString (!stdenv.isDarwin) ''
+      + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
         # The cmake rules apparently only use the Darwin install convention.
         # Fix up the installation so the module can be found on non-Darwin.
         mkdir -p $out/${swiftStaticModuleSubdir}
@@ -188,7 +188,7 @@ let
     '';
 
     postInstall = cmakeGlue.SwiftCollections
-      + lib.optionalString (!stdenv.isDarwin) ''
+      + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
         # The cmake rules apparently only use the Darwin install convention.
         # Fix up the installation so the module can be found on non-Darwin.
         mkdir -p $out/${swiftStaticModuleSubdir}
@@ -245,7 +245,7 @@ let
     ];
 
     postInstall = cmakeGlue.ArgumentParser
-      + lib.optionalString stdenv.isLinux ''
+      + lib.optionalString stdenv.hostPlatform.isLinux ''
         # Fix rpath so ArgumentParserToolInfo can be found.
         patchelf --add-rpath "$out/lib/swift/${swiftOs}" \
           $out/lib/swift/${swiftOs}/libArgumentParser.so
@@ -266,7 +266,7 @@ let
     name = "llbuild";
     src = generated.sources.swift-llbuild;
 
-    nativeBuildInputs = lib.optional stdenv.isDarwin xcbuild;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin xcbuild;
     buildInputs = [ ncursesInput sqlite ];
 
     patches = [
@@ -389,7 +389,7 @@ in stdenv.mkDerivation (commonAttrs // {
     sqlite
     XCTest
   ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CryptoKit
       LocalAuthentication
     ];
diff --git a/pkgs/development/compilers/swift/xctest/default.nix b/pkgs/development/compilers/swift/xctest/default.nix
index d50d11706cbd..f6f4cdacaed1 100644
--- a/pkgs/development/compilers/swift/xctest/default.nix
+++ b/pkgs/development/compilers/swift/xctest/default.nix
@@ -19,10 +19,10 @@ in stdenv.mkDerivation {
   outputs = [ "out" ];
 
   nativeBuildInputs = [ cmake ninja swift ]
-    ++ lib.optional stdenv.isDarwin DarwinTools; # sw_vers
+    ++ lib.optional stdenv.hostPlatform.isDarwin DarwinTools; # sw_vers
   buildInputs = [ Foundation ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # On Darwin only, Swift uses arm64 as cpu arch.
     substituteInPlace cmake/modules/SwiftSupport.cmake \
       --replace '"aarch64" PARENT_SCOPE' '"arm64" PARENT_SCOPE'
@@ -34,9 +34,9 @@ in stdenv.mkDerivation {
     export MACOSX_DEPLOYMENT_TARGET=10.12
   '';
 
-  cmakeFlags = lib.optional stdenv.isDarwin "-DUSE_FOUNDATION_FRAMEWORK=ON";
+  cmakeFlags = lib.optional stdenv.hostPlatform.isDarwin "-DUSE_FOUNDATION_FRAMEWORK=ON";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Darwin normally uses the Xcode version of XCTest. Installing
     # swift-corelibs-xctest is probably not officially supported, but we have
     # no alternative. Fix up the installation here.
diff --git a/pkgs/development/compilers/temurin-bin/jdk-linux-base.nix b/pkgs/development/compilers/temurin-bin/jdk-linux-base.nix
index 9da96aee8d5a..29cdf778f541 100644
--- a/pkgs/development/compilers/temurin-bin/jdk-linux-base.nix
+++ b/pkgs/development/compilers/temurin-bin/jdk-linux-base.nix
@@ -66,7 +66,7 @@ let
       xorg.libXrender
       xorg.libXtst
       zlib
-    ] ++ lib.optional stdenv.isAarch32 libffi;
+    ] ++ lib.optional stdenv.hostPlatform.isAarch32 libffi;
 
     nativeBuildInputs = [ autoPatchelfHook makeWrapper ];
 
diff --git a/pkgs/development/compilers/terra/default.nix b/pkgs/development/compilers/terra/default.nix
index 1d50d6e23ddb..4193ab53164c 100644
--- a/pkgs/development/compilers/terra/default.nix
+++ b/pkgs/development/compilers/terra/default.nix
@@ -45,8 +45,8 @@ in stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
   buildInputs = [ llvmMerged ncurses libffi libxml2 ]
     ++ lib.optionals enableCUDA [ cuda ]
-    ++ lib.optional (!stdenv.isDarwin) libpfm
-    ++ lib.optionals stdenv.isDarwin [ libobjc Cocoa Foundation ];
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) libpfm
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc Cocoa Foundation ];
 
   cmakeFlags = let
     resourceDir = "${llvmMerged}/lib/clang/" + (
@@ -100,6 +100,6 @@ in stdenv.mkDerivation rec {
     # never built on aarch64-darwin since first introduction in nixpkgs
     # Linux Aarch64 broken above LLVM11
     # https://github.com/terralang/terra/issues/597
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/compilers/tinycc/default.nix b/pkgs/development/compilers/tinycc/default.nix
index b36eb44229d1..65eea0a48e46 100644
--- a/pkgs/development/compilers/tinycc/default.nix
+++ b/pkgs/development/compilers/tinycc/default.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation (finalAttrs: {
       builtins.match "^[0-9]\\.+[0-9]+\\.[0-9]+" version != null;
   in ''
     ${
-      if stdenv.isDarwin && ! versionIsClean finalAttrs.version
+      if stdenv.hostPlatform.isDarwin && ! versionIsClean finalAttrs.version
       then "echo 'not overwriting VERSION since it would upset ld'"
       else "echo ${finalAttrs.version} > VERSION"
     }
@@ -89,7 +89,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   checkTarget = "test";
   # https://www.mail-archive.com/tinycc-devel@nongnu.org/msg10142.html
-  preCheck = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  preCheck = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     rm tests/tests2/{108,114}*
   '';
 
@@ -122,7 +122,7 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ joachifm AndersonTorres ];
     platforms = lib.platforms.unix;
     # https://www.mail-archive.com/tinycc-devel@nongnu.org/msg10199.html
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 })
 # TODO: more multiple outputs
diff --git a/pkgs/development/compilers/tinygo/default.nix b/pkgs/development/compilers/tinygo/default.nix
index a32e516633a8..386322780cca 100644
--- a/pkgs/development/compilers/tinygo/default.nix
+++ b/pkgs/development/compilers/tinygo/default.nix
@@ -54,7 +54,7 @@ buildGoModule rec {
   nativeCheckInputs = [ binaryen ];
   nativeBuildInputs = [ makeWrapper lld ];
   buildInputs = [ llvm clang.cc ]
-    ++ lib.optionals stdenv.isDarwin [ xar ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xar ];
 
   doCheck = (stdenv.buildPlatform.canExecute stdenv.hostPlatform);
   inherit tinygoTests;
@@ -112,7 +112,7 @@ buildGoModule rec {
 
   # GDB upstream does not support ARM darwin
   runtimeDeps = [ go clang.cc lld avrdude openocd binaryen ]
-    ++ lib.optionals (!(stdenv.isDarwin && stdenv.isAarch64)) [ gdb ];
+    ++ lib.optionals (!(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) [ gdb ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/development/compilers/uasm/default.nix b/pkgs/development/compilers/uasm/default.nix
index 21d9a2bf5d48..59332fa41f03 100644
--- a/pkgs/development/compilers/uasm/default.nix
+++ b/pkgs/development/compilers/uasm/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   makefile =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       "ClangOSX64.mak"
     else
       "gccLinux64.mak";
diff --git a/pkgs/development/compilers/unison/default.nix b/pkgs/development/compilers/unison/default.nix
index 2dd2b7a15897..5a8e57d2131b 100644
--- a/pkgs/development/compilers/unison/default.nix
+++ b/pkgs/development/compilers/unison/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
   pname = "unison-code-manager";
   version = "0.5.26";
 
-  src = if stdenv.isDarwin then
+  src = if stdenv.hostPlatform.isDarwin then
     fetchurl {
       url = "https://github.com/unisonweb/unison/releases/download/release/${finalAttrs.version}/ucm-macos.tar.gz";
       hash = "sha256-RF2Q5sCxT9F3IGM/8UP6bEe9sOjtpMVYHREuAPOzh8g=";
@@ -32,8 +32,8 @@ stdenv.mkDerivation (finalAttrs: {
   dontConfigure = true;
 
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optional (!stdenv.isDarwin) autoPatchelfHook;
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ gmp ncurses6 zlib ];
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) autoPatchelfHook;
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ gmp ncurses6 zlib ];
 
   installPhase = ''
     mkdir -p $out/{bin,lib}
diff --git a/pkgs/development/compilers/vala/default.nix b/pkgs/development/compilers/vala/default.nix
index 1b880b61a05a..96b995d64b6c 100644
--- a/pkgs/development/compilers/vala/default.nix
+++ b/pkgs/development/compilers/vala/default.nix
@@ -50,7 +50,7 @@ let
 
     nativeBuildInputs = [
       pkg-config flex bison libxslt gobject-introspection
-    ] ++ lib.optional (stdenv.isDarwin) expat
+    ] ++ lib.optional (stdenv.hostPlatform.isDarwin) expat
       ++ lib.optional disableGraphviz autoreconfHook # if we changed our ./configure script, need to reconfigure
       ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [ vala ]
       ++ extraNativeBuildInputs;
diff --git a/pkgs/development/compilers/vlang/default.nix b/pkgs/development/compilers/vlang/default.nix
index a0acfd263474..267f473274a5 100644
--- a/pkgs/development/compilers/vlang/default.nix
+++ b/pkgs/development/compilers/vlang/default.nix
@@ -19,7 +19,7 @@ let
     };
 
     # patch the ptrace reference for darwin
-    installPhase = lib.optionalString stdenv.isDarwin ''
+    installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace v.c \
         --replace "#include <sys/ptrace.h>" "${ptraceSubstitution}"
     '' + ''
@@ -56,9 +56,9 @@ stdenv.mkDerivation {
 
   buildInputs = [
     binaryen
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libX11
     xorg.libXau
     xorg.libXdmcp
diff --git a/pkgs/development/compilers/yap/default.nix b/pkgs/development/compilers/yap/default.nix
index db7d9b05b7fb..d58f2e9d728d 100644
--- a/pkgs/development/compilers/yap/default.nix
+++ b/pkgs/development/compilers/yap/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     # the linux 32 bit build fails.
-    broken = (stdenv.isLinux && stdenv.isAarch64) || !stdenv.is64bit;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || !stdenv.hostPlatform.is64bit;
     homepage = "http://www.dcc.fc.up.pt/~vsc/Yap/";
     description = "ISO-compatible high-performance Prolog compiler";
     license = lib.licenses.artistic2;
diff --git a/pkgs/development/compilers/zig/0.12/default.nix b/pkgs/development/compilers/zig/0.12/default.nix
index 1a730d4c0ce7..f359140df234 100644
--- a/pkgs/development/compilers/zig/0.12/default.nix
+++ b/pkgs/development/compilers/zig/0.12/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation (finalAttrs: {
   # /System/Library/CoreServices/.SystemVersionPlatform.plist to determine the
   # OS version. This causes the build to fail during stage 3 with
   # OSVersionDetectionFail when the sandbox is enabled.
-  __impureHostDeps = lib.optionals stdenv.isDarwin [
+  __impureHostDeps = lib.optionals stdenv.hostPlatform.isDarwin [
     "/System/Library/CoreServices/.SystemVersionPlatform.plist"
     "/System/Library/CoreServices/SystemVersion.plist"
   ];
diff --git a/pkgs/development/compilers/zig/0.13/default.nix b/pkgs/development/compilers/zig/0.13/default.nix
index 43093c822f02..8ec68f20260f 100644
--- a/pkgs/development/compilers/zig/0.13/default.nix
+++ b/pkgs/development/compilers/zig/0.13/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation (finalAttrs: {
   # /System/Library/CoreServices/.SystemVersionPlatform.plist to determine the
   # OS version. This causes the build to fail during stage 3 with
   # OSVersionDetectionFail when the sandbox is enabled.
-  __impureHostDeps = lib.optionals stdenv.isDarwin [
+  __impureHostDeps = lib.optionals stdenv.hostPlatform.isDarwin [
     "/System/Library/CoreServices/.SystemVersionPlatform.plist"
     "/System/Library/CoreServices/SystemVersion.plist"
   ];
diff --git a/pkgs/development/compilers/zig/generic.nix b/pkgs/development/compilers/zig/generic.nix
index cde1a61e3583..27c193c0567d 100644
--- a/pkgs/development/compilers/zig/generic.nix
+++ b/pkgs/development/compilers/zig/generic.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
   # /System/Library/CoreServices/.SystemVersionPlatform.plist to determine the
   # OS version. This causes the build to fail during stage 3 with
   # OSVersionDetectionFail when the sandbox is enabled.
-  __impureHostDeps = lib.optionals stdenv.isDarwin [
+  __impureHostDeps = lib.optionals stdenv.hostPlatform.isDarwin [
     "/System/Library/CoreServices/.SystemVersionPlatform.plist"
     "/System/Library/CoreServices/SystemVersion.plist"
   ];
diff --git a/pkgs/development/compilers/zulu/common.nix b/pkgs/development/compilers/zulu/common.nix
index c9056236ea6a..f1d0f43325f4 100644
--- a/pkgs/development/compilers/zulu/common.nix
+++ b/pkgs/development/compilers/zulu/common.nix
@@ -16,7 +16,7 @@
   # runtime dependencies
 , cups
   # runtime dependencies for GTK+ Look and Feel
-, gtkSupport ? stdenv.isLinux
+, gtkSupport ? stdenv.hostPlatform.isLinux
 , cairo
 , glib
 , gtk2
@@ -48,7 +48,7 @@ let
     gtk3
   ] ++ lib.optionals (gtkSupport && lib.versionOlder dist.jdkVersion "17") [
     gtk2
-  ] ++ lib.optionals (stdenv.isLinux && enableJavaFX) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && enableJavaFX) [
     ffmpeg.lib
   ];
 
@@ -75,12 +75,12 @@ let
 
     nativeBuildInputs = [
       unzip
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       autoPatchelfHook
       makeWrapper
     ];
 
-    buildInputs = lib.optionals stdenv.isLinux [
+    buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib # libasound.so wanted by lib/libjsound.so
       fontconfig
       freetype
@@ -92,9 +92,9 @@ let
       xorg.libXtst
       xorg.libXxf86vm
       zlib
-    ] ++ lib.optionals (stdenv.isLinux && enableJavaFX) runtimeDependencies;
+    ] ++ lib.optionals (stdenv.hostPlatform.isLinux && enableJavaFX) runtimeDependencies;
 
-    autoPatchelfIgnoreMissingDeps = if (stdenv.isLinux && enableJavaFX) then [
+    autoPatchelfIgnoreMissingDeps = if (stdenv.hostPlatform.isLinux && enableJavaFX) then [
       "libavcodec*.so.*"
       "libavformat*.so.*"
     ] else null;
@@ -126,7 +126,7 @@ let
       cat <<EOF >> $out/nix-support/setup-hook
       if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
       EOF
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       # We cannot use -exec since wrapProgram is a function but not a command.
       #
       # jspawnhelper is executed from JVM, so it doesn't need to wrap it, and it
@@ -138,14 +138,14 @@ let
       done
     ''
     # FIXME: move all of the above to installPhase.
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       find "$out" -name libfontmanager.so -exec \
         patchelf --add-needed libfontconfig.so {} \;
     '';
 
     # fixupPhase is moving the man to share/man which breaks it because it's a
     # relative symlink.
-    postFixup = lib.optionalString stdenv.isDarwin ''
+    postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
       ln -nsf ../zulu-${lib.versions.major version}.jdk/Contents/Home/man $out/share/man
     '';
 
diff --git a/pkgs/development/embedded/arduino/arduino-language-server/default.nix b/pkgs/development/embedded/arduino/arduino-language-server/default.nix
index 6c0a2885b433..d1be96454eec 100644
--- a/pkgs/development/embedded/arduino/arduino-language-server/default.nix
+++ b/pkgs/development/embedded/arduino/arduino-language-server/default.nix
@@ -26,7 +26,7 @@ buildGoModule rec {
     "-w"
     "-X github.com/arduino/arduino-language-server/version.versionString=${version}"
     "-X github.com/arduino/arduino-language-server/version.commit=unknown"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-extldflags '-static'"
   ];
 
diff --git a/pkgs/development/embedded/blisp/default.nix b/pkgs/development/embedded/blisp/default.nix
index ba1f42a90b0d..b6add8db9b8a 100644
--- a/pkgs/development/embedded/blisp/default.nix
+++ b/pkgs/development/embedded/blisp/default.nix
@@ -25,14 +25,14 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     argtable
     libserialport
-  ] ++ lib.optional stdenv.isDarwin IOKit;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin IOKit;
 
   cmakeFlags = [
     "-DBLISP_BUILD_CLI=ON"
     "-DBLISP_USE_SYSTEM_LIBRARIES=ON"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-error=implicit-function-declaration";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-error=implicit-function-declaration";
 
   passthru.tests.version = testers.testVersion {
     package = finalAttrs.finalPackage;
diff --git a/pkgs/development/embedded/bossa/default.nix b/pkgs/development/embedded/bossa/default.nix
index 3f55ccdd2e8b..f50b91ddbb09 100644
--- a/pkgs/development/embedded/bossa/default.nix
+++ b/pkgs/development/embedded/bossa/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     wxGTK32
     libX11
     readline
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
diff --git a/pkgs/development/embedded/easypdkprog/default.nix b/pkgs/development/embedded/easypdkprog/default.nix
index 28f06db9f35d..4e9b8f1722bc 100644
--- a/pkgs/development/embedded/easypdkprog/default.nix
+++ b/pkgs/development/embedded/easypdkprog/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     install -Dm755 -t $out/bin easypdkprog
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     install -Dm644 -t $out/etc/udev/rules.d Linux_udevrules/70-stm32vcp.rules
   '';
 
diff --git a/pkgs/development/embedded/edl/default.nix b/pkgs/development/embedded/edl/default.nix
index 570fda02d8e5..77ac43762492 100644
--- a/pkgs/development/embedded/edl/default.nix
+++ b/pkgs/development/embedded/edl/default.nix
@@ -57,6 +57,6 @@ python3Packages.buildPythonPackage {
       xddxdd
     ];
     # Case-sensitive files in 'Loader' submodule
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/embedded/elf2uf2-rs/default.nix b/pkgs/development/embedded/elf2uf2-rs/default.nix
index b3091df1e3f6..239ffbbeb96b 100644
--- a/pkgs/development/embedded/elf2uf2-rs/default.nix
+++ b/pkgs/development/embedded/elf2uf2-rs/default.nix
@@ -13,8 +13,8 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ];
 
-  buildInputs = lib.optional stdenv.isLinux udev
-    ++ lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux udev
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       DiskArbitration
       Foundation
diff --git a/pkgs/development/embedded/fpga/ecpdap/default.nix b/pkgs/development/embedded/fpga/ecpdap/default.nix
index ef1ba75c45b1..6d43f107563a 100644
--- a/pkgs/development/embedded/fpga/ecpdap/default.nix
+++ b/pkgs/development/embedded/fpga/ecpdap/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ libusb1 ]
-    ++ lib.optional stdenv.isDarwin AppKit;
+    ++ lib.optional stdenv.hostPlatform.isDarwin AppKit;
 
   postInstall = ''
     mkdir -p $out/etc/udev/rules.d
diff --git a/pkgs/development/embedded/fpga/fujprog/default.nix b/pkgs/development/embedded/fpga/fujprog/default.nix
index 69c23f2a71cd..bdac1033053a 100644
--- a/pkgs/development/embedded/fpga/fujprog/default.nix
+++ b/pkgs/development/embedded/fpga/fujprog/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libftdi1
     libusb-compat-0_1
-  ] ++ lib.optionals stdenv.isDarwin [ IOKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   meta = with lib; {
     description = "JTAG programmer for the ULX3S and ULX2S open hardware FPGA development boards";
diff --git a/pkgs/development/embedded/fpga/trellis/default.nix b/pkgs/development/embedded/fpga/trellis/default.nix
index b652f57fa81a..5726465311e5 100644
--- a/pkgs/development/embedded/fpga/trellis/default.nix
+++ b/pkgs/development/embedded/fpga/trellis/default.nix
@@ -42,7 +42,7 @@ in stdenv.mkDerivation rec {
     cd libtrellis
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in $out/bin/* ; do
       install_name_tool -change "$out/lib/libtrellis.dylib" "$out/lib/trellis/libtrellis.dylib" "$f"
     done
diff --git a/pkgs/development/embedded/openocd/default.nix b/pkgs/development/embedded/openocd/default.nix
index 366d1ed832c2..86dfd687ed2f 100644
--- a/pkgs/development/embedded/openocd/default.nix
+++ b/pkgs/development/embedded/openocd/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     ++ lib.optionals notWindows [ hidapi jimtcl libftdi1 libjaylink ]
     ++
     # tracking issue for v2 api changes https://sourceforge.net/p/openocd/tickets/306/
-    lib.optional stdenv.isLinux libgpiod_1;
+    lib.optional stdenv.hostPlatform.isLinux libgpiod_1;
 
   configureFlags = [
     "--disable-werror"
@@ -41,8 +41,8 @@ stdenv.mkDerivation rec {
     "--enable-remote-bitbang"
     (lib.enableFeature notWindows "buspirate")
     (lib.enableFeature (notWindows && enableFtdi) "ftdi")
-    (lib.enableFeature stdenv.isLinux "linuxgpiod")
-    (lib.enableFeature stdenv.isLinux "sysfsgpio")
+    (lib.enableFeature stdenv.hostPlatform.isLinux "linuxgpiod")
+    (lib.enableFeature stdenv.hostPlatform.isLinux "sysfsgpio")
     (lib.enableFeature isWindows "internal-jimtcl")
     (lib.enableFeature isWindows "internal-libjaylink")
   ] ++
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
     "-Wno-error=strict-prototypes" # fixes build failure with hidapi 0.10.0
   ]);
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p "$out/etc/udev/rules.d"
     rules="$out/share/openocd/contrib/60-openocd.rules"
     if [ ! -f "$rules" ]; then
diff --git a/pkgs/development/embedded/platformio/core.nix b/pkgs/development/embedded/platformio/core.nix
index 6890a2b1b35e..eb20e0f6a3e7 100644
--- a/pkgs/development/embedded/platformio/core.nix
+++ b/pkgs/development/embedded/platformio/core.nix
@@ -79,7 +79,7 @@ with python3Packages; buildPythonApplication rec {
     uvicorn
     wsproto
     zeroconf
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     chardet
   ];
 
diff --git a/pkgs/development/gnuradio-modules/ais/default.nix b/pkgs/development/gnuradio-modules/ais/default.nix
index 66a6e82fff8b..a86fce043d97 100644
--- a/pkgs/development/gnuradio-modules/ais/default.nix
+++ b/pkgs/development/gnuradio-modules/ais/default.nix
@@ -60,7 +60,7 @@ mkDerivation rec {
     platforms = platforms.unix;
     # rpcserver_aggregator.h:111:54: error: no template named 'unary_function'
     # in namespace 'std'; did you mean '__unary_function'?
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ mog ];
   };
 }
diff --git a/pkgs/development/gnuradio-modules/osmosdr/default.nix b/pkgs/development/gnuradio-modules/osmosdr/default.nix
index dbf7513cacc1..663ffafd7f3b 100644
--- a/pkgs/development/gnuradio-modules/osmosdr/default.nix
+++ b/pkgs/development/gnuradio-modules/osmosdr/default.nix
@@ -71,7 +71,7 @@ in mkDerivation {
   ] ++ lib.optionals (gnuradio.hasFeature "python-support") [
       python.pkgs.numpy
       python.pkgs.pybind11
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.IOKit
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/development/guile-modules/guile-gcrypt/default.nix b/pkgs/development/guile-modules/guile-gcrypt/default.nix
index ff31b009da31..3b6aa220ae92 100644
--- a/pkgs/development/guile-modules/guile-gcrypt/default.nix
+++ b/pkgs/development/guile-modules/guile-gcrypt/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   # In procedure bytevector-u8-ref: Argument 2 out of range
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Bindings to Libgcrypt for GNU Guile";
diff --git a/pkgs/development/guile-modules/guile-git/default.nix b/pkgs/development/guile-modules/guile-git/default.nix
index b91d13a63745..f092238929bf 100644
--- a/pkgs/development/guile-modules/guile-git/default.nix
+++ b/pkgs/development/guile-modules/guile-git/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   propagatedBuildInputs = [
     libgit2 scheme-bytestructures
   ];
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/guile-modules/guile-lib/default.nix b/pkgs/development/guile-modules/guile-lib/default.nix
index 1e5ddbd49143..5143c959ccd5 100644
--- a/pkgs/development/guile-modules/guile-lib/default.nix
+++ b/pkgs/development/guile-modules/guile-lib/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     # Make `libgcc_s.so' visible for `pthread_cancel'.
diff --git a/pkgs/development/guile-modules/guile-ssh/default.nix b/pkgs/development/guile-modules/guile-ssh/default.nix
index a1928c78ce75..ad3a8c547442 100644
--- a/pkgs/development/guile-modules/guile-ssh/default.nix
+++ b/pkgs/development/guile-modules/guile-ssh/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
   enableParallelBuilding = true;
 
   # FAIL: server-client.scm
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postInstall = ''
     mv $out/bin/*.scm $out/share/guile-ssh
diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 3abbd578e5c4..e1d70248acfb 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -387,7 +387,7 @@ self: super: {
   numerals-base = dontCheck (doJailbreak super.numerals-base);
 
   # This test keeps being aborted because it runs too quietly for too long
-  Lazy-Pbkdf2 = if pkgs.stdenv.isi686 then dontCheck super.Lazy-Pbkdf2 else super.Lazy-Pbkdf2;
+  Lazy-Pbkdf2 = if pkgs.stdenv.hostPlatform.isi686 then dontCheck super.Lazy-Pbkdf2 else super.Lazy-Pbkdf2;
 
   # check requires mysql server
   mysql-simple = dontCheck super.mysql-simple;
@@ -901,12 +901,12 @@ self: super: {
   Cabal-ide-backend = dontCheck super.Cabal-ide-backend;
 
   # This package can't be built on non-Windows systems.
-  Win32 = overrideCabal (drv: { broken = !pkgs.stdenv.isCygwin; }) super.Win32;
+  Win32 = overrideCabal (drv: { broken = !pkgs.stdenv.hostPlatform.isCygwin; }) super.Win32;
   inline-c-win32 = dontDistribute super.inline-c-win32;
   Southpaw = dontDistribute super.Southpaw;
 
   # https://ghc.haskell.org/trac/ghc/ticket/9825
-  vimus = overrideCabal (drv: { broken = pkgs.stdenv.isLinux && pkgs.stdenv.isi686; }) super.vimus;
+  vimus = overrideCabal (drv: { broken = pkgs.stdenv.hostPlatform.isLinux && pkgs.stdenv.hostPlatform.isi686; }) super.vimus;
 
   # https://github.com/kazu-yamamoto/logger/issues/42
   logger = dontCheck super.logger;
diff --git a/pkgs/development/haskell-modules/configuration-darwin.nix b/pkgs/development/haskell-modules/configuration-darwin.nix
index 5933627583a6..0c5b9106643e 100644
--- a/pkgs/development/haskell-modules/configuration-darwin.nix
+++ b/pkgs/development/haskell-modules/configuration-darwin.nix
@@ -359,7 +359,7 @@ self: super: ({
     '';
   }) super.di-core;
 
-} // lib.optionalAttrs pkgs.stdenv.isAarch64 {  # aarch64-darwin
+} // lib.optionalAttrs pkgs.stdenv.hostPlatform.isAarch64 {  # aarch64-darwin
 
   # Workarounds for justStaticExecutables on aarch64-darwin. Since dead code
   # elimination barely works on aarch64-darwin, any package that has a
@@ -429,7 +429,7 @@ self: super: ({
   rivet-adaptor-postgresql = dontCheck super.rivet-adaptor-postgresql;
   tmp-proc-postgres = dontCheck super.tmp-proc-postgres;
 
-} // lib.optionalAttrs pkgs.stdenv.isx86_64 {  # x86_64-darwin
+} // lib.optionalAttrs pkgs.stdenv.hostPlatform.isx86_64 {  # x86_64-darwin
 
   # tests appear to be failing to link or something:
   # https://hydra.nixos.org/build/174540882/nixlog/9
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 8477d68dfaf5..6400e5246aea 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -300,7 +300,7 @@ self: super: builtins.intersectAttrs super {
     [ (disableHardening ["fortify"])
       (addBuildTool self.buildHaskellPackages.gtk2hs-buildtools)
     ] ++
-    ( if pkgs.stdenv.isDarwin then [(appendConfigureFlag "-fhave-quartz-gtk")] else [] )
+    ( if pkgs.stdenv.hostPlatform.isDarwin then [(appendConfigureFlag "-fhave-quartz-gtk")] else [] )
   );
   gtksourceview2 = addPkgconfigDepend pkgs.gtk2 super.gtksourceview2;
   gtk-traymanager = addPkgconfigDepend pkgs.gtk3 super.gtk-traymanager;
@@ -585,7 +585,7 @@ self: super: builtins.intersectAttrs super {
   #
   # Additional note: nixpkgs' freeglut and macOS's OpenGL implementation do not cooperate,
   # so disable this on Darwin only
-  ${if pkgs.stdenv.isDarwin then null else "GLUT"} = overrideCabal (drv: {
+  ${if pkgs.stdenv.hostPlatform.isDarwin then null else "GLUT"} = overrideCabal (drv: {
     pkg-configDepends = drv.pkg-configDepends or [] ++ [
       pkgs.freeglut
     ];
@@ -823,9 +823,9 @@ self: super: builtins.intersectAttrs super {
     # https://git-annex.branchable.com/git-annex-shell/
     passthru.shellPath = "/bin/git-annex-shell";
   }) (super.git-annex.override {
-    dbus = if pkgs.stdenv.isLinux then self.dbus else null;
-    fdo-notify = if pkgs.stdenv.isLinux then self.fdo-notify else null;
-    hinotify = if pkgs.stdenv.isLinux then self.hinotify else self.fsnotify;
+    dbus = if pkgs.stdenv.hostPlatform.isLinux then self.dbus else null;
+    fdo-notify = if pkgs.stdenv.hostPlatform.isLinux then self.fdo-notify else null;
+    hinotify = if pkgs.stdenv.hostPlatform.isLinux then self.hinotify else self.fsnotify;
   });
 
   # The test suite has undeclared dependencies on git.
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 23dc5054a854..92c2451a5df1 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -53,7 +53,7 @@ in
 # TODO enable shared libs for cross-compiling
 , enableSharedExecutables ? false
 , enableSharedLibraries ? !stdenv.hostPlatform.isStatic && (ghc.enableShared or false)
-, enableDeadCodeElimination ? (!stdenv.isDarwin)  # TODO: use -dead_strip for darwin
+, enableDeadCodeElimination ? (!stdenv.hostPlatform.isDarwin)  # TODO: use -dead_strip for darwin
 # Disabling this for ghcjs prevents this crash: https://gitlab.haskell.org/ghc/ghc/-/issues/23235
 , enableStaticLibraries ? !(stdenv.hostPlatform.isWindows || stdenv.hostPlatform.isWasm || stdenv.hostPlatform.isGhcjs)
 , enableHsc2hsViaAsm ? stdenv.hostPlatform.isWindows
@@ -242,8 +242,8 @@ let
     "--with-gcc=$CC" # Clang won't work without that extra information.
   ] ++ [
     "--package-db=$packageConfDir"
-    (optionalString (enableSharedExecutables && stdenv.isLinux) "--ghc-option=-optl=-Wl,-rpath=$out/${ghcLibdir}/${pname}-${version}")
-    (optionalString (enableSharedExecutables && stdenv.isDarwin) "--ghc-option=-optl=-Wl,-headerpad_max_install_names")
+    (optionalString (enableSharedExecutables && stdenv.hostPlatform.isLinux) "--ghc-option=-optl=-Wl,-rpath=$out/${ghcLibdir}/${pname}-${version}")
+    (optionalString (enableSharedExecutables && stdenv.hostPlatform.isDarwin) "--ghc-option=-optl=-Wl,-headerpad_max_install_names")
     (optionalString enableParallelBuilding (makeGhcOptions [ "-j$NIX_BUILD_CORES" "+RTS" "-A64M" "-RTS" ]))
     (optionalString useCpphs ("--with-cpphs=${cpphs}/bin/cpphs " + (makeGhcOptions [ "-cpp"  "-pgmP${cpphs}/bin/cpphs" "-optP--cpp" ])))
     (enableFeature enableLibraryProfiling "library-profiling")
@@ -501,7 +501,7 @@ stdenv.mkDerivation ({
   # the `$out/lib/links` directory to read-only when the build is done after the
   # dist directory has already been exported, which triggers an unnecessary
   # rebuild of modules included in the exported dist directory.
-  + (optionalString (stdenv.isDarwin && (enableSharedLibraries || enableSharedExecutables) && !enableSeparateIntermediatesOutput) ''
+  + (optionalString (stdenv.hostPlatform.isDarwin && (enableSharedLibraries || enableSharedExecutables) && !enableSeparateIntermediatesOutput) ''
     # Work around a limit in the macOS Sierra linker on the number of paths
     # referenced by any one dynamic library:
     #
diff --git a/pkgs/development/interpreters/bats/default.nix b/pkgs/development/interpreters/bats/default.nix
index 17d22a14cae5..1cdf6369914d 100644
--- a/pkgs/development/interpreters/bats/default.nix
+++ b/pkgs/development/interpreters/bats/default.nix
@@ -69,7 +69,7 @@ resholve.mkDerivation rec {
         external = [
           "greadlink"
           "shlock"
-        ] ++ lib.optionals stdenv.isDarwin [
+        ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
           "pkill" # procps doesn't supply this on darwin
         ];
       };
@@ -119,7 +119,7 @@ resholve.mkDerivation rec {
         "cannot:libexec/bats-core/bats-exec-file"
         "cannot:libexec/bats-core/bats-exec-suite"
         "cannot:libexec/bats-core/bats-gather-tests"
-      ] ++ lib.optionals (!stdenv.isDarwin) [
+      ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
         # checked invocations for exec
         "cannot:${procps}/bin/pkill"
       ];
@@ -196,7 +196,7 @@ resholve.mkDerivation rec {
         parallel # skips some tests if it can't detect
         flock # skips some tests if it can't detect
         procps
-      ] ++ lib.optionals stdenv.isDarwin [ lsof ];
+      ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ lsof ];
       inherit doInstallCheck;
       installCheckPhase = ''
         # TODO: cut if https://github.com/bats-core/bats-core/issues/418 allows
@@ -225,7 +225,7 @@ resholve.mkDerivation rec {
     # aren't massive builds)
     inherit bash-preexec locate-dominating-file packcc;
     resholve = resholve.tests.cli;
-  } // lib.optionalAttrs (!stdenv.isDarwin) {
+  } // lib.optionalAttrs (!stdenv.hostPlatform.isDarwin) {
     # TODO: kikit's kicad dependency is marked broken on darwin atm
     # may be able to fold this up if that resolves.
     inherit kikit;
diff --git a/pkgs/development/interpreters/bic/default.nix b/pkgs/development/interpreters/bic/default.nix
index 669cb4f723ac..1571e93e071f 100644
--- a/pkgs/development/interpreters/bic/default.nix
+++ b/pkgs/development/interpreters/bic/default.nix
@@ -40,6 +40,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = with maintainers; [ hexagonal-sun ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/interpreters/chibi/default.nix b/pkgs/development/interpreters/chibi/default.nix
index b220ed834029..9cdd21a6b955 100644
--- a/pkgs/development/interpreters/chibi/default.nix
+++ b/pkgs/development/interpreters/chibi/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   fixupPhase = ''
     wrapProgram "$out/bin/chibi-scheme" \
       --prefix CHIBI_MODULE_PATH : "$out/share/chibi:$out/lib/chibi" \
-      ${lib.optionalString stdenv.isDarwin "--prefix DYLD_LIBRARY_PATH : $out/lib"}
+      ${lib.optionalString stdenv.hostPlatform.isDarwin "--prefix DYLD_LIBRARY_PATH : $out/lib"}
 
     for f in chibi-doc chibi-ffi snow-chibi; do
       substituteInPlace "$out/bin/$f" \
diff --git a/pkgs/development/interpreters/cling/default.nix b/pkgs/development/interpreters/cling/default.nix
index f1cbd213b871..86e43de5945a 100644
--- a/pkgs/development/interpreters/cling/default.nix
+++ b/pkgs/development/interpreters/cling/default.nix
@@ -26,7 +26,7 @@
 
 # Build with libc++ (LLVM) rather than stdlibc++ (GCC).
 # This is experimental and not all features work.
-, useLLVMLibcxx ? clangStdenv.isDarwin
+, useLLVMLibcxx ? clangStdenv.hostPlatform.isDarwin
 }:
 
 let
@@ -97,7 +97,7 @@ let
 
     CPPFLAGS = if useLLVMLibcxx then [ "-stdlib=libc++" ] else [];
 
-    postInstall = lib.optionalString (!stdenv.isDarwin) ''
+    postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       mkdir -p $out/share/Jupyter
       cp -r /build/clang/tools/cling/tools/Jupyter/kernel $out/share/Jupyter
     '';
diff --git a/pkgs/development/interpreters/clisp/default.nix b/pkgs/development/interpreters/clisp/default.nix
index f6218ef8f3b2..c0f0e2c5c2f8 100644
--- a/pkgs/development/interpreters/clisp/default.nix
+++ b/pkgs/development/interpreters/clisp/default.nix
@@ -33,7 +33,7 @@
     "pcre"
     "rawsock"
   ]
-  ++ lib.optionals stdenv.isLinux [ "bindings/glibc" "zlib" ]
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ "bindings/glibc" "zlib" ]
   ++ lib.optional x11Support "clx/new-clx"
 }:
 
@@ -41,7 +41,7 @@ assert x11Support -> (libX11 != null && libXau != null && libXt != null
   && libXpm != null && xorgproto != null && libXext != null);
 
 let
-  ffcallAvailable = stdenv.isLinux && (libffcall != null);
+  ffcallAvailable = stdenv.hostPlatform.isLinux && (libffcall != null);
   # Some modules need autoreconf called in their directory.
   shouldReconfModule = name: name != "asdf";
 in
@@ -85,7 +85,7 @@ stdenv.mkDerivation {
     find . -type f | xargs sed -e 's/-lICE/-lXau &/' -i
   '';
 
-  preConfigure = lib.optionalString stdenv.isDarwin (''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin (''
     (
       cd src
       autoreconf -f -i -I m4 -I glm4
@@ -121,7 +121,7 @@ stdenv.mkDerivation {
       (''./clisp-link add "$out"/lib/clisp*/base "$(dirname "$out"/lib/clisp*/base)"/full''
       + lib.concatMapStrings (x: " " + x) withModules);
 
-  env.NIX_CFLAGS_COMPILE = "-O0 -falign-functions=${if stdenv.is64bit then "8" else "4"}";
+  env.NIX_CFLAGS_COMPILE = "-O0 -falign-functions=${if stdenv.hostPlatform.is64bit then "8" else "4"}";
 
   meta = {
     description = "ANSI Common Lisp Implementation";
diff --git a/pkgs/development/interpreters/cyber/default.nix b/pkgs/development/interpreters/cyber/default.nix
index 2ef863de5dfa..19d266da0e41 100644
--- a/pkgs/development/interpreters/cyber/default.nix
+++ b/pkgs/development/interpreters/cyber/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ figsoda ];
     inherit (zig_0_11.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/interpreters/cyclone/default.nix b/pkgs/development/interpreters/cyclone/default.nix
index 643ee3a63216..75a4b763ae7d 100644
--- a/pkgs/development/interpreters/cyclone/default.nix
+++ b/pkgs/development/interpreters/cyclone/default.nix
@@ -15,7 +15,7 @@ let
 
     enableParallelBuilding = true;
 
-    nativeBuildInputs = lib.optionals stdenv.isDarwin [ cctools ];
+    nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
 
     buildInputs = [ libck ];
 
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
   enableParallelBuilding = true;
 
   nativeBuildInputs = [ bootstrap ]
-    ++ lib.optionals stdenv.isDarwin [ cctools ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
 
   buildInputs = [ libck ];
 
diff --git a/pkgs/development/interpreters/dzaima-apl/default.nix b/pkgs/development/interpreters/dzaima-apl/default.nix
index 75e49ed602df..a607fb0fefe4 100644
--- a/pkgs/development/interpreters/dzaima-apl/default.nix
+++ b/pkgs/development/interpreters/dzaima-apl/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ AndersonTorres ];
     inherit (jdk.meta) platforms;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dapl-native.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dapl-native.x86_64-darwin
   };
 }
 # TODO: Processing app
diff --git a/pkgs/development/interpreters/erlang/generic-builder.nix b/pkgs/development/interpreters/erlang/generic-builder.nix
index b5502a036247..38af8a6e0926 100644
--- a/pkgs/development/interpreters/erlang/generic-builder.nix
+++ b/pkgs/development/interpreters/erlang/generic-builder.nix
@@ -74,7 +74,7 @@
 , meta ? { }
 }:
 
-assert wxSupport -> (if stdenv.isDarwin
+assert wxSupport -> (if stdenv.hostPlatform.isDarwin
 then wxGTK != null
 else libGL != null && libGLU != null && wxGTK != null && xorg != null);
 
@@ -84,7 +84,7 @@ assert ex_docSupport -> ex_doc != null;
 
 let
   inherit (lib) optional optionals optionalAttrs optionalString;
-  wxPackages2 = if stdenv.isDarwin then [ wxGTK ] else wxPackages;
+  wxPackages2 = if stdenv.hostPlatform.isDarwin then [ wxGTK ] else wxPackages;
 
 in
 stdenv.mkDerivation ({
@@ -105,7 +105,7 @@ stdenv.mkDerivation ({
     ++ optionals odbcSupport odbcPackages
     ++ optionals javacSupport javacPackages
     ++ optional systemdSupport systemd
-    ++ optionals stdenv.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [ AGL Carbon Cocoa WebKit ]);
+    ++ optionals stdenv.hostPlatform.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [ AGL Carbon Cocoa WebKit ]);
 
   debugInfo = enableDebugInfo;
 
@@ -148,9 +148,9 @@ stdenv.mkDerivation ({
     ++ optional odbcSupport "--with-odbc=${unixODBC}"
     ++ optional wxSupport "--enable-wx"
     ++ optional systemdSupport "--enable-systemd"
-    ++ optional stdenv.isDarwin "--enable-darwin-64bit"
+    ++ optional stdenv.hostPlatform.isDarwin "--enable-darwin-64bit"
     # make[3]: *** [yecc.beam] Segmentation fault: 11
-    ++ optional (stdenv.isDarwin && stdenv.isx86_64) "--disable-jit"
+    ++ optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "--disable-jit"
     ++ configureFlags;
 
   # install-docs will generate and install manpages and html docs
diff --git a/pkgs/development/interpreters/evcxr/default.nix b/pkgs/development/interpreters/evcxr/default.nix
index 6d64e76b816c..a95e45fc6536 100644
--- a/pkgs/development/interpreters/evcxr/default.nix
+++ b/pkgs/development/interpreters/evcxr/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
   RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";
 
   nativeBuildInputs = [ pkg-config makeWrapper cmake ];
-  buildInputs = lib.optionals stdenv.isDarwin
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin
     [ libiconv CoreServices Security ];
 
   checkFlags = [
diff --git a/pkgs/development/interpreters/femtolisp/default.nix b/pkgs/development/interpreters/femtolisp/default.nix
index 7bf0ea7c7540..3e35f7edc657 100644
--- a/pkgs/development/interpreters/femtolisp/default.nix
+++ b/pkgs/development/interpreters/femtolisp/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
     homepage = "https://git.sr.ht/~ft/femtolisp";
     license = with lib.licenses; [ mit bsd3 ];
     maintainers = with lib.maintainers; [ moody ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     platforms = lib.platforms.unix;
     mainProgram = "flisp";
   };
diff --git a/pkgs/development/interpreters/gauche/default.nix b/pkgs/development/interpreters/gauche/default.nix
index 62903de6bb8b..3fb736ff7e38 100644
--- a/pkgs/development/interpreters/gauche/default.nix
+++ b/pkgs/development/interpreters/gauche/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     zlib
     mbedtls
     cacert
-  ] ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   autoreconfPhase = ''
     ./DIST gen
diff --git a/pkgs/development/interpreters/gnu-apl/default.nix b/pkgs/development/interpreters/gnu-apl/default.nix
index 85e86de1d6b2..ee4d8482cd41 100644
--- a/pkgs/development/interpreters/gnu-apl/default.nix
+++ b/pkgs/development/interpreters/gnu-apl/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     "-Wno-error=use-after-free"
    ]) ++ lib.optional stdenv.cc.isClang "-Wno-error=null-dereference");
 
-  patchPhase = lib.optionalString stdenv.isDarwin ''
+  patchPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/LApack.cc --replace "malloc.h" "malloc/malloc.h"
   '';
 
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Free interpreter for the APL programming language";
     homepage    = "https://www.gnu.org/software/apl/";
     license     = licenses.gpl3Plus;
diff --git a/pkgs/development/interpreters/gnudatalanguage/default.nix b/pkgs/development/interpreters/gnudatalanguage/default.nix
index 41f15afbee30..d9acb974df88 100644
--- a/pkgs/development/interpreters/gnudatalanguage/default.nix
+++ b/pkgs/development/interpreters/gnudatalanguage/default.nix
@@ -24,16 +24,16 @@
 , libgeotiff
 , libjpeg
   # eccodes is broken on darwin
-, enableGRIB ? stdenv.isLinux
+, enableGRIB ? stdenv.hostPlatform.isLinux
 , eccodes
-, enableGLPK ? stdenv.isLinux
+, enableGLPK ? stdenv.hostPlatform.isLinux
 , glpk
   # We enable it in hdf4 and use libtirpc as a dependency here from the passthru
   # of hdf4
-, enableLibtirpc ? stdenv.isLinux
+, enableLibtirpc ? stdenv.hostPlatform.isLinux
 , libtirpc
 , python3
-, enableMPI ? (stdenv.isLinux || stdenv.isDarwin)
+, enableMPI ? (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin)
   # Choose MPICH over OpenMPI because it currently builds on AArch and Darwin
 , mpi
   # Unfree optional dependency for hdf4 and hdf5
@@ -57,11 +57,11 @@
 , plplot-forced ? null
   # wxWidgets is preferred over X11 for this project but we only have it on Linux
   # and Darwin.
-, enableWX ? (stdenv.isLinux || stdenv.isDarwin)
+, enableWX ? (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin)
 , wxGTK32
 , Cocoa
   # X11: OFF by default for platform consistency. Use X where WX is not available
-, enableXWin ? (!stdenv.isLinux && !stdenv.isDarwin)
+, enableXWin ? (!stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isDarwin)
 }:
 
 let
@@ -146,7 +146,7 @@ stdenv.mkDerivation rec {
   ++ lib.optional enableGRIB eccodes
   ++ lib.optional enableGLPK glpk
   ++ lib.optional enableWX wxGTK32
-  ++ lib.optional (enableWX && stdenv.isDarwin) Cocoa
+  ++ lib.optional (enableWX && stdenv.hostPlatform.isDarwin) Cocoa
   ++ lib.optional enableMPI mpi
   ++ lib.optional enableLibtirpc hdf4-custom.libtirpc
   ++ lib.optional enableSzip szip;
@@ -172,7 +172,7 @@ stdenv.mkDerivation rec {
 
   # Tests are failing on Hydra:
   # ./src/common/dpycmn.cpp(137): assert ""IsOk()"" failed in GetClientArea(): invalid wxDisplay object
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   # Opt-out unstable tests
   # https://github.com/gnudatalanguage/gdl/issues/482
diff --git a/pkgs/development/interpreters/guile/2.0.nix b/pkgs/development/interpreters/guile/2.0.nix
index 57ff88025690..510834df4046 100644
--- a/pkgs/development/interpreters/guile/2.0.nix
+++ b/pkgs/development/interpreters/guile/2.0.nix
@@ -79,7 +79,7 @@ builder rec {
       sha256 = "0p6c1lmw1iniq03z7x5m65kg3lq543kgvdb4nrxsaxjqf3zhl77v";
     })] ++
   (lib.optional (coverageAnalysis != null) ./gcov-file-name.patch)
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ./filter-mkostemp-darwin.patch
     (fetchpatch {
       url = "https://gitlab.gnome.org/GNOME/gtk-osx/raw/52898977f165777ad9ef169f7d4818f2d4c9b731/patches/guile-clocktime.patch";
@@ -92,11 +92,11 @@ builder rec {
 
   # don't have "libgcc_s.so.1" on darwin
   LDFLAGS = lib.optionalString
-    (!stdenv.isDarwin && !stdenv.hostPlatform.isMusl) "-lgcc_s";
+    (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isMusl) "-lgcc_s";
 
   configureFlags = [
     "--with-libreadline-prefix"
-  ] ++ lib.optionals stdenv.isSunOS [
+  ] ++ lib.optionals stdenv.hostPlatform.isSunOS [
     # Make sure the right <gmp.h> is found, and not the incompatible
     # /usr/include/mp.h from OpenSolaris. See
     # <https://lists.gnu.org/archive/html/hydra-users/2012-08/msg00000.html>
@@ -159,7 +159,7 @@ builder rec {
 
 //
 
-(lib.optionalAttrs (!stdenv.isLinux) {
+(lib.optionalAttrs (!stdenv.hostPlatform.isLinux) {
   # Work around <https://bugs.gnu.org/14201>.
   SHELL = stdenv.shell;
   CONFIG_SHELL = stdenv.shell;
diff --git a/pkgs/development/interpreters/guile/2.2.nix b/pkgs/development/interpreters/guile/2.2.nix
index 9dd102012068..6c75540dae0c 100644
--- a/pkgs/development/interpreters/guile/2.2.nix
+++ b/pkgs/development/interpreters/guile/2.2.nix
@@ -73,7 +73,7 @@ builder rec {
     # Read the header of the patch to more info
     ./eai_system.patch
   ] ++ lib.optional (coverageAnalysis != null) ./gcov-file-name.patch
-  ++ lib.optional stdenv.isDarwin
+  ++ lib.optional stdenv.hostPlatform.isDarwin
     (fetchpatch {
       url = "https://gitlab.gnome.org/GNOME/gtk-osx/raw/52898977f165777ad9ef169f7d4818f2d4c9b731/patches/guile-clocktime.patch";
       sha256 = "12wvwdna9j8795x59ldryv9d84c1j3qdk2iskw09306idfsis207";
@@ -88,7 +88,7 @@ builder rec {
 
   configureFlags = [
     "--with-libreadline-prefix=${lib.getDev readline}"
-  ] ++ lib.optionals stdenv.isSunOS [
+  ] ++ lib.optionals stdenv.hostPlatform.isSunOS [
     # Make sure the right <gmp.h> is found, and not the incompatible
     # /usr/include/mp.h from OpenSolaris.  See
     # <https://lists.gnu.org/archive/html/hydra-users/2012-08/msg00000.html>
diff --git a/pkgs/development/interpreters/guile/3.0.nix b/pkgs/development/interpreters/guile/3.0.nix
index f7797a7c8ad2..1eeda97b0f8b 100644
--- a/pkgs/development/interpreters/guile/3.0.nix
+++ b/pkgs/development/interpreters/guile/3.0.nix
@@ -49,7 +49,7 @@ builder rec {
     libtool
     libunistring
     readline
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libxcrypt
   ];
   propagatedBuildInputs = [
@@ -62,7 +62,7 @@ builder rec {
     # flags, see below.
     libtool
     libunistring
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libxcrypt
   ];
 
@@ -75,7 +75,7 @@ builder rec {
   patches = [
     ./eai_system.patch
   ] ++ lib.optional (coverageAnalysis != null) ./gcov-file-name.patch
-  ++ lib.optional stdenv.isDarwin
+  ++ lib.optional stdenv.hostPlatform.isDarwin
     (fetchpatch {
       url = "https://gitlab.gnome.org/GNOME/gtk-osx/raw/52898977f165777ad9ef169f7d4818f2d4c9b731/patches/guile-clocktime.patch";
       sha256 = "12wvwdna9j8795x59ldryv9d84c1j3qdk2iskw09306idfsis207";
@@ -90,7 +90,7 @@ builder rec {
 
   configureFlags = [
     "--with-libreadline-prefix=${lib.getDev readline}"
-  ] ++ lib.optionals stdenv.isSunOS [
+  ] ++ lib.optionals stdenv.hostPlatform.isSunOS [
     # Make sure the right <gmp.h> is found, and not the incompatible
     # /usr/include/mp.h from OpenSolaris.  See
     # <https://lists.gnu.org/archive/html/hydra-users/2012-08/msg00000.html>
@@ -105,7 +105,7 @@ builder rec {
   ]
   # At least on x86_64-darwin '-flto' autodetection is not correct:
   #  https://github.com/NixOS/nixpkgs/pull/160051#issuecomment-1046193028
-  ++ lib.optional (stdenv.isDarwin) "--disable-lto";
+  ++ lib.optional (stdenv.hostPlatform.isDarwin) "--disable-lto";
 
   postInstall = ''
     wrapProgram $out/bin/guile-snarf --prefix PATH : "${gawk}/bin"
@@ -129,7 +129,7 @@ builder rec {
   doInstallCheck = doCheck;
 
   # In procedure bytevector-u8-ref: Argument 2 out of range
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   setupHook = ./setup-hook-3.0.sh;
 
diff --git a/pkgs/development/interpreters/hashlink/default.nix b/pkgs/development/interpreters/hashlink/default.nix
index f017e1a43c86..6ecb4913dbc8 100644
--- a/pkgs/development/interpreters/hashlink/default.nix
+++ b/pkgs/development/interpreters/hashlink/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
     cp -r other/haxelib/* "${haxelibPath}"
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libhl.dylib $out/lib/libhl.dylib $out/bin/hl
   '';
 
diff --git a/pkgs/development/interpreters/hugs/default.nix b/pkgs/development/interpreters/hugs/default.nix
index d8ee5726ef33..ab48ef91b362 100644
--- a/pkgs/development/interpreters/hugs/default.nix
+++ b/pkgs/development/interpreters/hugs/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "hugs";
     homepage = "https://www.haskell.org/hugs";
     description = "Haskell interpreter";
diff --git a/pkgs/development/interpreters/icon-lang/default.nix b/pkgs/development/interpreters/icon-lang/default.nix
index e5c486ed8de2..2ea8a20d4f6c 100644
--- a/pkgs/development/interpreters/icon-lang/default.nix
+++ b/pkgs/development/interpreters/icon-lang/default.nix
@@ -21,11 +21,11 @@ stdenv.mkDerivation rec {
     let
       target = if withGraphics then "X-Configure" else "Configure";
       platform =
-        if stdenv.isLinux then "linux"
-        else if stdenv.isDarwin then "macintosh"
-        else if stdenv.isBSD then "bsd"
-        else if stdenv.isCygwin then "cygwin"
-        else if stdenv.isSunOS then "solaris"
+        if stdenv.hostPlatform.isLinux then "linux"
+        else if stdenv.hostPlatform.isDarwin then "macintosh"
+        else if stdenv.hostPlatform.isBSD then "bsd"
+        else if stdenv.hostPlatform.isCygwin then "cygwin"
+        else if stdenv.hostPlatform.isSunOS then "solaris"
         else throw "unsupported system";
     in
     "make ${target} name=${platform}";
diff --git a/pkgs/development/interpreters/janet/default.nix b/pkgs/development/interpreters/janet/default.nix
index 34388c8c033b..1efb95bcade8 100644
--- a/pkgs/development/interpreters/janet/default.nix
+++ b/pkgs/development/interpreters/janet/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
   postPatch = ''
     substituteInPlace janet.1 \
       --replace /usr/local/ $out/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # error: Socket is not connected
     substituteInPlace meson.build \
       --replace "'test/suite-ev.janet'," ""
diff --git a/pkgs/development/interpreters/kerf/default.nix b/pkgs/development/interpreters/kerf/default.nix
index d019743bfb4d..e11a683082ed 100644
--- a/pkgs/development/interpreters/kerf/default.nix
+++ b/pkgs/development/interpreters/kerf/default.nix
@@ -18,9 +18,9 @@ stdenv.mkDerivation rec {
 
   sourceRoot = "${src.name}/src";
   buildInputs = [ libedit zlib ncurses ]
-    ++ lib.optionals stdenv.isDarwin ([
+    ++ lib.optionals stdenv.hostPlatform.isDarwin ([
       Accelerate
-    ] ++ lib.optionals stdenv.isx86_64 /* && isDarwin */ [
+    ] ++ lib.optionals stdenv.hostPlatform.isx86_64 /* && isDarwin */ [
       CoreGraphics CoreVideo
     ]);
 
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     "implicit-function-declaration"
     "gnu-variable-sized-type-not-at-end"
     "unused-result"
-  ] ++ lib.optionals stdenv.isDarwin [ "-fcommon" ]);
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-fcommon" ]);
 
   patchPhase = ''
     substituteInPlace ./Makefile \
@@ -88,6 +88,6 @@ stdenv.mkDerivation rec {
 
     # aarch64-linux seems hopeless, with over 2,000 warnings
     # generated?
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/interpreters/lua-5/default.nix b/pkgs/development/interpreters/lua-5/default.nix
index 7f1e5ccb7313..30ce00d44e61 100644
--- a/pkgs/development/interpreters/lua-5/default.nix
+++ b/pkgs/development/interpreters/lua-5/default.nix
@@ -86,7 +86,7 @@ rec {
     makeWrapper = makeBinaryWrapper;
     inherit passthruFun;
 
-    patches = lib.optional stdenv.isDarwin ./5.4.darwin.patch;
+    patches = lib.optional stdenv.hostPlatform.isDarwin ./5.4.darwin.patch;
   };
 
   lua5_4_compat = lua5_4.override({
@@ -102,7 +102,7 @@ rec {
     inherit passthruFun;
 
     patches =
-      lib.optionals stdenv.isDarwin [ ./5.2.darwin.patch ];
+      lib.optionals stdenv.hostPlatform.isDarwin [ ./5.2.darwin.patch ];
   };
 
   lua5_3_compat = lua5_3.override({
@@ -119,7 +119,7 @@ rec {
     inherit passthruFun;
     patches = [
       ./CVE-2022-28805.patch
-    ] ++ lib.optional stdenv.isDarwin ./5.2.darwin.patch;
+    ] ++ lib.optional stdenv.hostPlatform.isDarwin ./5.2.darwin.patch;
   };
 
   lua5_2_compat = lua5_2.override({
@@ -134,7 +134,7 @@ rec {
     hash = "2640fc56a795f29d28ef15e13c34a47e223960b0240e8cb0a82d9b0738695333";
     makeWrapper = makeBinaryWrapper;
     inherit passthruFun;
-    patches = (lib.optional stdenv.isDarwin ./5.1.darwin.patch)
+    patches = (lib.optional stdenv.hostPlatform.isDarwin ./5.1.darwin.patch)
       ++ [ ./CVE-2014-5461.patch ];
   };
 
diff --git a/pkgs/development/interpreters/lua-5/interpreter.nix b/pkgs/development/interpreters/lua-5/interpreter.nix
index 497307d57b3f..0f7b65df95ef 100644
--- a/pkgs/development/interpreters/lua-5/interpreter.nix
+++ b/pkgs/development/interpreters/lua-5/interpreter.nix
@@ -25,12 +25,12 @@ stdenv.mkDerivation (finalAttrs:
 
     luaversion = lib.versions.majorMinor finalAttrs.version;
 
-    plat = if (stdenv.isLinux && lib.versionOlder self.luaversion "5.4") then "linux"
-          else if (stdenv.isLinux && lib.versionAtLeast self.luaversion "5.4") then "linux-readline"
-          else if stdenv.isDarwin then "macosx"
+    plat = if (stdenv.hostPlatform.isLinux && lib.versionOlder self.luaversion "5.4") then "linux"
+          else if (stdenv.hostPlatform.isLinux && lib.versionAtLeast self.luaversion "5.4") then "linux-readline"
+          else if stdenv.hostPlatform.isDarwin then "macosx"
           else if stdenv.hostPlatform.isMinGW then "mingw"
-          else if stdenv.isFreeBSD then "freebsd"
-          else if stdenv.isSunOS then "solaris"
+          else if stdenv.hostPlatform.isFreeBSD then "freebsd"
+          else if stdenv.hostPlatform.isSunOS then "solaris"
           else if stdenv.hostPlatform.isBSD then "bsd"
           else if stdenv.hostPlatform.isUnix then "posix"
           else "generic";
@@ -67,7 +67,7 @@ stdenv.mkDerivation (finalAttrs:
 
       # abort if patching didn't work
       grep $out src/luaconf.h
-  '' + lib.optionalString (!stdenv.isDarwin && !staticOnly) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin && !staticOnly) ''
     # Add a target for a shared library to the Makefile.
     sed -e '1s/^/LUA_SO = liblua.so/' \
         -e 's/ALL_T *= */&$(LUA_SO) /' \
@@ -96,10 +96,10 @@ stdenv.mkDerivation (finalAttrs:
 
     makeFlagsArray+=(CFLAGS='-O2 -fPIC${lib.optionalString compat compatFlags} $(${
       if lib.versionAtLeast luaversion "5.2" then "SYSCFLAGS" else "MYCFLAGS"})' )
-    makeFlagsArray+=(${lib.optionalString stdenv.isDarwin "CC=\"$CC\""}${lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) " 'AR=${stdenv.cc.targetPrefix}ar rcu'"})
+    makeFlagsArray+=(${lib.optionalString stdenv.hostPlatform.isDarwin "CC=\"$CC\""}${lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) " 'AR=${stdenv.cc.targetPrefix}ar rcu'"})
 
     installFlagsArray=( TO_BIN="lua luac" INSTALL_DATA='cp -d' \
-      TO_LIB="${if stdenv.isDarwin then "liblua.${finalAttrs.version}.dylib"
+      TO_LIB="${if stdenv.hostPlatform.isDarwin then "liblua.${finalAttrs.version}.dylib"
                 else ("liblua.a" + lib.optionalString (!staticOnly) " liblua.so liblua.so.${luaversion} liblua.so.${finalAttrs.version}" )}" )
 
     runHook postConfigure
diff --git a/pkgs/development/interpreters/luajit/default.nix b/pkgs/development/interpreters/luajit/default.nix
index f5e25b6261bc..22574dd2b389 100644
--- a/pkgs/development/interpreters/luajit/default.nix
+++ b/pkgs/development/interpreters/luajit/default.nix
@@ -58,7 +58,7 @@ let
   # TODO support also other build architectures. The ideal way would be to use
   # stdenv_32bit but that doesn't work due to host platform mismatch:
   # https://github.com/NixOS/nixpkgs/issues/212494
-  buildStdenv = if buildPackages.stdenv.isx86_64 && stdenv.is32bit
+  buildStdenv = if buildPackages.stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.is32bit
     then buildPackages.pkgsi686Linux.buildPackages.stdenv
     else buildPackages.stdenv;
 
diff --git a/pkgs/development/interpreters/lunatic/default.nix b/pkgs/development/interpreters/lunatic/default.nix
index 4ad07f6a1e33..6ccee2b8de76 100644
--- a/pkgs/development/interpreters/lunatic/default.nix
+++ b/pkgs/development/interpreters/lunatic/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/interpreters/lune/default.nix b/pkgs/development/interpreters/lune/default.nix
index 3d84ac9ba521..d010361a931c 100644
--- a/pkgs/development/interpreters/lune/default.nix
+++ b/pkgs/development/interpreters/lune/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
     cmake # required for libz-ng-sys
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
@@ -64,6 +64,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mpl20;
     maintainers = with maintainers; [ lammermann ];
     # note: Undefined symbols for architecture x86_64
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/interpreters/maude/default.nix b/pkgs/development/interpreters/maude/default.nix
index f8d4e98c90b2..667c797cd093 100644
--- a/pkgs/development/interpreters/maude/default.nix
+++ b/pkgs/development/interpreters/maude/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
   ];
 
   hardeningDisable = [ "stackprotector" ] ++
-    lib.optionals stdenv.isi686 [ "pic" "fortify" ];
+    lib.optionals stdenv.hostPlatform.isi686 [ "pic" "fortify" ];
 
   # Fix for glibc-2.34, see
   # https://gitweb.gentoo.org/repo/gentoo.git/commit/dev-lang/maude/maude-3.1-r1.ebuild?id=f021cc6cfa1e35eb9c59955830f1fd89bfcb26b4
diff --git a/pkgs/development/interpreters/micropython/default.nix b/pkgs/development/interpreters/micropython/default.nix
index 98ef61f82195..df34036a9423 100644
--- a/pkgs/development/interpreters/micropython/default.nix
+++ b/pkgs/development/interpreters/micropython/default.nix
@@ -43,8 +43,8 @@ stdenv.mkDerivation rec {
   __darwinAllowLocalNetworking = true; # needed for select_poll_eintr test
 
   skippedTests = " -e select_poll_fd"
-    + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) " -e ffi_callback -e float_parse -e float_parse_doubleproc"
-    + lib.optionalString (stdenv.isLinux && stdenv.isAarch64) " -e float_parse"
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) " -e ffi_callback -e float_parse -e float_parse_doubleproc"
+    + lib.optionalString (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) " -e float_parse"
   ;
 
   checkPhase = ''
diff --git a/pkgs/development/interpreters/mujs/default.nix b/pkgs/development/interpreters/mujs/default.nix
index 225146b33fe7..9bffafe4bd73 100644
--- a/pkgs/development/interpreters/mujs/default.nix
+++ b/pkgs/development/interpreters/mujs/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ readline ];
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
 
   makeFlags = [ "prefix=$(out)" ];
 
diff --git a/pkgs/development/interpreters/nextflow/default.nix b/pkgs/development/interpreters/nextflow/default.nix
index ed07f175b653..0408bf243121 100644
--- a/pkgs/development/interpreters/nextflow/default.nix
+++ b/pkgs/development/interpreters/nextflow/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
   };
 };
 in
-if stdenv.isLinux then
+if stdenv.hostPlatform.isLinux then
   buildFHSEnv
   {
     name = "nextflow";
diff --git a/pkgs/development/interpreters/octave/default.nix b/pkgs/development/interpreters/octave/default.nix
index 8bf1c43d1239..72895919383d 100644
--- a/pkgs/development/interpreters/octave/default.nix
+++ b/pkgs/development/interpreters/octave/default.nix
@@ -136,9 +136,9 @@ in stdenv.mkDerivation (finalAttrs: {
       libsForQt5.qscintilla
     ] ++ lib.optionals (enableJava) [
       jdk
-    ] ++ lib.optionals (!stdenv.isDarwin) [
+    ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       libGL libGLU libX11
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.Accelerate
       darwin.apple_sdk.frameworks.Cocoa
@@ -153,12 +153,12 @@ in stdenv.mkDerivation (finalAttrs: {
       libsForQt5.qttools
     ];
 
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
 
     enableParallelBuilding = true;
 
     # Fix linker error on Darwin (see https://trac.macports.org/ticket/61865)
-    NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-lobjc";
+    NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-lobjc";
 
     # See https://savannah.gnu.org/bugs/?50339
     F77_INTEGER_8_FLAG = lib.optionalString use64BitIdx "-fdefault-integer-8";
@@ -168,9 +168,9 @@ in stdenv.mkDerivation (finalAttrs: {
       "--with-lapack=lapack"
       (if use64BitIdx then "--enable-64" else "--disable-64")
     ]
-    ++ lib.optionals stdenv.isDarwin [ "--enable-link-all-dependencies" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--enable-link-all-dependencies" ]
     ++ lib.optionals enableReadline [ "--enable-readline" ]
-    ++ lib.optionals stdenv.isDarwin [ "--with-x=no" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--with-x=no" ]
     ++ lib.optionals enableQt [ "--with-qt=5" ]
     ;
 
diff --git a/pkgs/development/interpreters/perl/interpreter.nix b/pkgs/development/interpreters/perl/interpreter.nix
index 2afdcded3db4..23336cb8f478 100644
--- a/pkgs/development/interpreters/perl/interpreter.nix
+++ b/pkgs/development/interpreters/perl/interpreter.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation (rec {
   # the libxcrypt port has been installed.
   #
   # Without libxcrypt, Perl will still find FreeBSD's crypt functions.
-  propagatedBuildInputs = lib.optional (enableCrypt && !stdenv.isFreeBSD) libxcrypt;
+  propagatedBuildInputs = lib.optional (enableCrypt && !stdenv.hostPlatform.isFreeBSD) libxcrypt;
 
   disallowedReferences = [ stdenv.cc ];
 
@@ -70,8 +70,8 @@ stdenv.mkDerivation (rec {
     ++ lib.optional (lib.versionOlder version "5.38.0") ./no-sys-dirs-5.31.patch
     ++ lib.optional (lib.versionAtLeast version "5.38.0") ./no-sys-dirs-5.38.0.patch
 
-    ++ lib.optional stdenv.isSunOS ./ld-shared.patch
-    ++ lib.optionals stdenv.isDarwin [ ./cpp-precomp.patch ./sw_vers.patch ]
+    ++ lib.optional stdenv.hostPlatform.isSunOS ./ld-shared.patch
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ ./cpp-precomp.patch ./sw_vers.patch ]
     ++ lib.optional crossCompiling ./cross.patch;
 
   # This is not done for native builds because pwd may need to come from
@@ -107,7 +107,7 @@ stdenv.mkDerivation (rec {
       "-Dloclibpth=${libcLib}/lib"
     ]
     ++ lib.optionals ((builtins.match ''5\.[0-9]*[13579]\..+'' version) != null) [ "-Dusedevel" "-Uversiononly" ]
-    ++ lib.optional stdenv.isSunOS "-Dcc=gcc"
+    ++ lib.optional stdenv.hostPlatform.isSunOS "-Dcc=gcc"
     ++ lib.optional enableThreading "-Dusethreads"
     ++ lib.optional (!enableCrypt) "-A clear:d_crypt_r"
     ++ lib.optional stdenv.hostPlatform.isStatic "--all-static"
@@ -116,7 +116,7 @@ stdenv.mkDerivation (rec {
       "-Dman1dir=${placeholder "out"}/share/man/man1"
       "-Dman3dir=${placeholder "out"}/share/man/man3"
     ]
-    ++ lib.optionals (stdenv.isFreeBSD && crossCompiling && enableCrypt) [
+    ++ lib.optionals (stdenv.hostPlatform.isFreeBSD && crossCompiling && enableCrypt) [
       # https://github.com/Perl/perl5/issues/22295
       # configure cannot figure out that we have crypt automatically, but we really do
       "-Dd_crypt"
@@ -157,7 +157,7 @@ stdenv.mkDerivation (rec {
     GZIP_OS_CODE = AUTO_DETECT
     USE_ZLIB_NG  = False
     EOF
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace hints/darwin.sh --replace "env MACOSX_DEPLOYMENT_TARGET=10.3" ""
   '' + lib.optionalString (!enableThreading) ''
     # We need to do this because the bootstrap doesn't have a static libpthread
diff --git a/pkgs/development/interpreters/php/generic.nix b/pkgs/development/interpreters/php/generic.nix
index 458804e2e51d..13e10103f54f 100644
--- a/pkgs/development/interpreters/php/generic.nix
+++ b/pkgs/development/interpreters/php/generic.nix
@@ -58,7 +58,7 @@ let
     , zendSignalsSupport ? true
     , zendMaxExecutionTimersSupport ? false
     , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd
-    , valgrindSupport ? !stdenv.isDarwin && lib.meta.availableOn stdenv.hostPlatform valgrind
+    , valgrindSupport ? !stdenv.hostPlatform.isDarwin && lib.meta.availableOn stdenv.hostPlatform valgrind
     , ztsSupport ? apxs2Support
     }@args:
 
@@ -213,7 +213,7 @@ let
           enableParallelBuilding = true;
 
           nativeBuildInputs = [ autoconf automake bison flex libtool pkg-config re2c ]
-            ++ lib.optional stdenv.isDarwin xcbuild;
+            ++ lib.optional stdenv.hostPlatform.isDarwin xcbuild;
 
           buildInputs =
             # PCRE extension
@@ -285,7 +285,7 @@ let
               if [ -f "scripts/dev/genfiles" ]; then
                 ./scripts/dev/genfiles
               fi
-            '' + lib.optionalString stdenv.isDarwin ''
+            '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
               substituteInPlace configure --replace-fail "-lstdc++" "-lc++"
             '';
 
diff --git a/pkgs/development/interpreters/picoc/default.nix b/pkgs/development/interpreters/picoc/default.nix
index d27efe1f2b82..eaf08de7b994 100644
--- a/pkgs/development/interpreters/picoc/default.nix
+++ b/pkgs/development/interpreters/picoc/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
 
   makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=implicit-function-declaration"
   ]);
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
 
   # Tests are currently broken on i686 see
   # https://hydra.nixos.org/build/24003763/nixlog/1
-  doCheck = !stdenv.isi686 && !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isi686 && !stdenv.hostPlatform.isAarch64;
   checkTarget = "test";
 
   installPhase = ''
diff --git a/pkgs/development/interpreters/python/cpython/2.7/default.nix b/pkgs/development/interpreters/python/cpython/2.7/default.nix
index af9bbc47475b..abb66b38e3cc 100644
--- a/pkgs/development/interpreters/python/cpython/2.7/default.nix
+++ b/pkgs/development/interpreters/python/cpython/2.7/default.nix
@@ -137,14 +137,14 @@ let
         revert = true;
         hash = "sha256-Lp5fGlcfJJ6p6vKmcLckJiAA2AZz4prjFE0aMEJxotw=";
       })
-    ] ++ lib.optionals (x11Support && stdenv.isDarwin) [
+    ] ++ lib.optionals (x11Support && stdenv.hostPlatform.isDarwin) [
       ./use-correct-tcl-tk-on-darwin.patch
 
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Fix darwin build https://bugs.python.org/issue34027
       ../3.7/darwin-libutil.patch
 
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
 
       # Disable the use of ldconfig in ctypes.util.find_library (since
       # ldconfig doesn't work on NixOS), and don't use
@@ -188,7 +188,7 @@ let
       for i in Lib/plat-*/regen; do
         substituteInPlace $i --replace /usr/include/ ${stdenv.cc.libc}/include/
       done
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace configure --replace '`/usr/bin/arch`' '"i386"'
       substituteInPlace Lib/multiprocessing/__init__.py \
         --replace 'os.popen(comm)' 'os.popen("${coreutils}/bin/nproc")'
@@ -205,7 +205,7 @@ let
     "--enable-unicode=ucs${toString ucsEncoding}"
   ] ++ lib.optionals stdenv.hostPlatform.isCygwin [
     "ac_cv_func_bind_textdomain_codeset=yes"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--disable-toolbox-glue"
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "PYTHON_FOR_BUILD=${lib.getBin buildPackages.python}/bin/python"
@@ -240,7 +240,7 @@ let
     lib.optional (stdenv ? cc && stdenv.cc.libc != null) stdenv.cc.libc ++
     [ bzip2 openssl zlib libffi expat db gdbm ncurses sqlite readline ]
     ++ lib.optionals x11Support [ tcl tk libX11 ]
-    ++ lib.optional (stdenv.isDarwin && configd != null) configd;
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && configd != null) configd;
   nativeBuildInputs =
     [ autoreconfHook ]
     ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform)
@@ -264,7 +264,7 @@ in with passthru; stdenv.mkDerivation ({
 
     inherit src patches buildInputs nativeBuildInputs preConfigure configureFlags;
 
-    LDFLAGS = lib.optionalString (!stdenv.isDarwin) "-lgcc_s";
+    LDFLAGS = lib.optionalString (!stdenv.hostPlatform.isDarwin) "-lgcc_s";
     inherit (mkPaths buildInputs) C_INCLUDE_PATH LIBRARY_PATH;
 
     env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.targetPlatform.system == "x86_64-darwin") "-msse2"
diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
index 56e0be3ea59c..bb3dba534b79 100644
--- a/pkgs/development/interpreters/python/cpython/default.nix
+++ b/pkgs/development/interpreters/python/cpython/default.nix
@@ -70,7 +70,7 @@
 , enableNoSemanticInterposition ? true
 
 # enabling LTO on 32bit arch causes downstream packages to fail when linking
-, enableLTO ? stdenv.isDarwin || (stdenv.is64bit && stdenv.isLinux)
+, enableLTO ? stdenv.hostPlatform.isDarwin || (stdenv.hostPlatform.is64bit && stdenv.hostPlatform.isLinux)
 
 # enable asserts to ensure the build remains reproducible
 , reproducibleBuild ? false
@@ -95,7 +95,7 @@ assert x11Support -> tcl != null
 
 assert bluezSupport -> bluez != null;
 
-assert lib.assertMsg (enableFramework -> stdenv.isDarwin)
+assert lib.assertMsg (enableFramework -> stdenv.hostPlatform.isDarwin)
   "Framework builds are only supported on Darwin.";
 
 assert lib.assertMsg (reproducibleBuild -> stripBytecode)
@@ -152,7 +152,7 @@ let
 
   nativeBuildInputs = [
     nukeReferences
-  ] ++ optionals (!stdenv.isDarwin) [
+  ] ++ optionals (!stdenv.hostPlatform.isDarwin) [
     autoconf-archive # needed for AX_CHECK_COMPILE_FLAG
     autoreconfHook
     pkg-config
@@ -181,7 +181,7 @@ let
   ] ++ optionals stdenv.hostPlatform.isMinGW [
     windows.dlfcn
     windows.mingw_w64_pthreads
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     configd
   ] ++ optionals tzdataSupport [
     tzdata
@@ -293,9 +293,9 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
     bash # only required for patchShebangs
   ] ++ buildInputs;
 
-  prePatch = optionalString stdenv.isDarwin ''
+  prePatch = optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace-fail '`/usr/bin/arch`' '"i386"'
-  '' + optionalString (pythonOlder "3.9" && stdenv.isDarwin && x11Support) ''
+  '' + optionalString (pythonOlder "3.9" && stdenv.hostPlatform.isDarwin && x11Support) ''
     # Broken on >= 3.9; replaced with ./3.9/darwin-tcl-tk.patch
     substituteInPlace setup.py --replace-fail /Library/Frameworks /no-such-path
   '';
@@ -307,7 +307,7 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
     # (since it will do a futile invocation of gcc (!) to find
     # libuuid, slowing down program startup a lot).
     noldconfigPatch
-  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform && stdenv.isFreeBSD) [
+  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform && stdenv.hostPlatform.isFreeBSD) [
     # Cross compilation only supports a limited number of "known good"
     # configurations. If you're reading this and it's been a long time
     # since this diff, consider submitting this patch upstream!
@@ -327,7 +327,7 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
     ./3.7/darwin-libutil.patch
   ] ++ optionals (pythonAtLeast "3.11") [
     ./3.11/darwin-libutil.patch
-  ] ++ optionals (pythonAtLeast "3.9" && pythonOlder "3.11" && stdenv.isDarwin) [
+  ] ++ optionals (pythonAtLeast "3.9" && pythonOlder "3.11" && stdenv.hostPlatform.isDarwin) [
     # Stop checking for TCL/TK in global macOS locations
     ./3.9/darwin-tcl-tk.patch
   ] ++ optionals (hasDistutilsCxxPatch && pythonOlder "3.12") [
@@ -384,7 +384,7 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
   env = {
     CPPFLAGS = concatStringsSep " " (map (p: "-I${getDev p}/include") buildInputs);
     LDFLAGS = concatStringsSep " " (map (p: "-L${getLib p}/lib") buildInputs);
-    LIBS = "${optionalString (!stdenv.isDarwin) "-lcrypt"}";
+    LIBS = "${optionalString (!stdenv.hostPlatform.isDarwin) "-lcrypt"}";
     NIX_LDFLAGS = lib.optionalString (stdenv.cc.isGNU && !stdenv.hostPlatform.isStatic) ({
       "glibc" = "-lgcc_s";
       "musl" = "-lgcc_eh";
@@ -414,7 +414,7 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
     (enableFeature enableGIL "gil")
   ] ++ optionals enableOptimizations [
     "--enable-optimizations"
-  ] ++ optionals (stdenv.isDarwin && configd == null) [
+  ] ++ optionals (stdenv.hostPlatform.isDarwin && configd == null) [
     # Make conditional on Darwin for now to avoid causing Linux rebuilds.
     "py_cv_module__scproxy=n/a"
   ] ++ optionals (sqlite != null) [
@@ -467,16 +467,16 @@ in with passthru; stdenv.mkDerivation (finalAttrs: {
     for path in /usr /sw /opt /pkg; do
       substituteInPlace ./setup.py --replace-warn $path /no-such-path
     done
-  '' + optionalString stdenv.isDarwin ''
+  '' + optionalString stdenv.hostPlatform.isDarwin ''
     # Override the auto-detection in setup.py, which assumes a universal build
-    export PYTHON_DECIMAL_WITH_MACHINE=${if stdenv.isAarch64 then "uint128" else "x64"}
+    export PYTHON_DECIMAL_WITH_MACHINE=${if stdenv.hostPlatform.isAarch64 then "uint128" else "x64"}
     # Ensure that modern platform features are enabled on Darwin in spite of having no version suffix.
     sed -E -i -e 's|Darwin/\[12\]\[0-9\]\.\*|Darwin/*|' configure
   '' + optionalString (pythonAtLeast "3.11") ''
     # Also override the auto-detection in `configure`.
     substituteInPlace configure \
-      --replace-fail 'libmpdec_machine=universal' 'libmpdec_machine=${if stdenv.isAarch64 then "uint128" else "x64"}'
-  '' + optionalString (stdenv.isDarwin && x11Support && pythonAtLeast "3.11") ''
+      --replace-fail 'libmpdec_machine=universal' 'libmpdec_machine=${if stdenv.hostPlatform.isAarch64 then "uint128" else "x64"}'
+  '' + optionalString (stdenv.hostPlatform.isDarwin && x11Support && pythonAtLeast "3.11") ''
     export TCLTK_LIBS="-L${tcl}/lib -L${tk}/lib -l${tcl.libPrefix} -l${tk.libPrefix}"
     export TCLTK_CFLAGS="-I${tcl}/include -I${tk}/include"
   '' + optionalString stdenv.hostPlatform.isMusl ''
diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index e70816a90eee..3f8338845d63 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -139,7 +139,7 @@ in {
 
     hash = "sha256-3WHYjaJ0ws4s7HdmfUo9+aZSvMUOJvkJkdTdCvZrzPQ=";
     pythonVersion = "2.7";
-    db = db.override { dbmSupport = !stdenv.isDarwin; };
+    db = db.override { dbmSupport = !stdenv.hostPlatform.isDarwin; };
     python = __splicedPackages.pythonInterpreters.pypy27_prebuilt;
     inherit passthruFun;
     inherit (darwin) libunwind;
@@ -156,7 +156,7 @@ in {
 
     hash = "sha256-56IEbH5sJfw4aru1Ey6Sp8wkkeOTVpmpRstdy7NCwqo=";
     pythonVersion = "3.9";
-    db = db.override { dbmSupport = !stdenv.isDarwin; };
+    db = db.override { dbmSupport = !stdenv.hostPlatform.isDarwin; };
     python = __splicedPackages.pypy27;
     inherit passthruFun;
     inherit (darwin) libunwind;
diff --git a/pkgs/development/interpreters/python/mk-python-derivation.nix b/pkgs/development/interpreters/python/mk-python-derivation.nix
index d75fea0eaef1..086ebfb3ed04 100644
--- a/pkgs/development/interpreters/python/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/mk-python-derivation.nix
@@ -307,7 +307,7 @@ let
 
     inherit strictDeps;
 
-    LANG = "${if python.stdenv.isDarwin then "en_US" else "C"}.UTF-8";
+    LANG = "${if python.stdenv.hostPlatform.isDarwin then "en_US" else "C"}.UTF-8";
 
     # Python packages don't have a checkPhase, only an installCheckPhase
     doCheck = false;
diff --git a/pkgs/development/interpreters/python/pypy/default.nix b/pkgs/development/interpreters/python/pypy/default.nix
index 0380c29e9e75..3dcbce42cf0a 100644
--- a/pkgs/development/interpreters/python/pypy/default.nix
+++ b/pkgs/development/interpreters/python/pypy/default.nix
@@ -63,7 +63,7 @@ in with passthru; stdenv.mkDerivation rec {
     zlib
   ] ++ lib.optionals (lib.any (l: l == optimizationLevel) [ "0" "1" "2" "3"]) [
     boehmgc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libunwind Security
   ];
 
@@ -132,9 +132,9 @@ in with passthru; stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
-  preFixup = lib.optionalString (stdenv.isDarwin) ''
+  preFixup = lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     install_name_tool -change @rpath/lib${executable}-c.dylib $out/lib/lib${executable}-c.dylib $out/bin/${executable}
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     mkdir -p $out/${executable}-c/pypy/bin
     mv $out/bin/${executable} $out/${executable}-c/pypy/bin/${executable}
     ln -s $out/${executable}-c/pypy/bin/${executable} $out/bin/${executable}
diff --git a/pkgs/development/interpreters/python/pypy/prebuilt.nix b/pkgs/development/interpreters/python/pypy/prebuilt.nix
index 4b47c642eca4..95e392bc37b7 100644
--- a/pkgs/development/interpreters/python/pypy/prebuilt.nix
+++ b/pkgs/development/interpreters/python/pypy/prebuilt.nix
@@ -71,15 +71,15 @@ in with passthru; stdenv.mkDerivation {
     sqlite
     zlib
     stdenv.cc.cc.libgcc or null
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     tcl-8_5
     tk-8_5
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     tcl-8_6
     tk-8_6
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   installPhase = ''
     runHook preInstall
@@ -88,7 +88,7 @@ in with passthru; stdenv.mkDerivation {
     echo "Moving files to $out"
     mv -t $out bin include lib
     mv $out/bin/libpypy*-c${stdenv.hostPlatform.extensions.sharedLibrary} $out/lib/
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       rm $out/bin/*.debug
     ''}
 
@@ -101,12 +101,12 @@ in with passthru; stdenv.mkDerivation {
     runHook postInstall
   '';
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     find $out/{lib,lib_pypy*} -name "*.so" \
       -exec patchelf \
         --replace-needed libtinfow.so.6 libncursesw.so.6 \
         --replace-needed libgdbm.so.4 libgdbm_compat.so.4 {} \;
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool \
       -change \
         @rpath/lib${libPrefix}-c.dylib \
@@ -119,12 +119,12 @@ in with passthru; stdenv.mkDerivation {
         $out/bin/${libPrefix}
     install_name_tool \
       -change \
-        /opt/homebrew${lib.optionalString stdenv.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtcl8.6.dylib \
+        /opt/homebrew${lib.optionalString stdenv.hostPlatform.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtcl8.6.dylib \
         ${tcl-8_6}/lib/libtcl8.6.dylib \
         $out/lib/${libPrefix}/_tkinter/*.so
     install_name_tool \
       -change \
-        /opt/homebrew${lib.optionalString stdenv.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtk8.6.dylib \
+        /opt/homebrew${lib.optionalString stdenv.hostPlatform.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtk8.6.dylib \
         ${tk-8_6}/lib/libtk8.6.dylib \
         $out/lib/${libPrefix}/_tkinter/*.so
   '';
diff --git a/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix b/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix
index 37a06f9f61ed..0d7e2d131abc 100644
--- a/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix
+++ b/pkgs/development/interpreters/python/pypy/prebuilt_2_7.nix
@@ -71,15 +71,15 @@ in with passthru; stdenv.mkDerivation {
     sqlite
     zlib
     stdenv.cc.cc.libgcc or null
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     tcl-8_5
     tk-8_5
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     tcl-8_6
     tk-8_6
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   installPhase = ''
     runHook preInstall
@@ -88,7 +88,7 @@ in with passthru; stdenv.mkDerivation {
     echo "Moving files to $out"
     mv -t $out bin include lib-python lib_pypy site-packages
     mv $out/bin/libpypy*-c${stdenv.hostPlatform.extensions.sharedLibrary} $out/lib/
-    ${lib.optionalString stdenv.isLinux ''
+    ${lib.optionalString stdenv.hostPlatform.isLinux ''
       mv lib/libffi.so.6* $out/lib/
       rm $out/bin/*.debug
     ''}
@@ -102,12 +102,12 @@ in with passthru; stdenv.mkDerivation {
     runHook postInstall
   '';
 
-  preFixup = lib.optionalString (stdenv.isLinux) ''
+  preFixup = lib.optionalString (stdenv.hostPlatform.isLinux) ''
     find $out/{lib,lib_pypy*} -name "*.so" \
       -exec patchelf \
         --replace-needed libtinfow.so.6 libncursesw.so.6 \
         --replace-needed libgdbm.so.4 libgdbm_compat.so.4 {} \;
-  '' + lib.optionalString (stdenv.isDarwin) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     install_name_tool \
       -change \
         @rpath/lib${executable}-c.dylib \
@@ -115,12 +115,12 @@ in with passthru; stdenv.mkDerivation {
         $out/bin/${executable}
     install_name_tool \
       -change \
-        /opt/homebrew${lib.optionalString stdenv.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtcl8.6.dylib \
+        /opt/homebrew${lib.optionalString stdenv.hostPlatform.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtcl8.6.dylib \
         ${tcl-8_6}/lib/libtcl8.6.dylib \
         $out/lib_pypy/_tkinter/*.so
     install_name_tool \
       -change \
-        /opt/homebrew${lib.optionalString stdenv.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtk8.6.dylib \
+        /opt/homebrew${lib.optionalString stdenv.hostPlatform.isx86_64 "_x86_64"}/opt/tcl-tk/lib/libtk8.6.dylib \
         ${tk-8_6}/lib/libtk8.6.dylib \
         $out/lib_pypy/_tkinter/*.so
   '';
diff --git a/pkgs/development/interpreters/python/python2/mk-python-derivation.nix b/pkgs/development/interpreters/python/python2/mk-python-derivation.nix
index 0fb6a5d57f22..427c94241070 100644
--- a/pkgs/development/interpreters/python/python2/mk-python-derivation.nix
+++ b/pkgs/development/interpreters/python/python2/mk-python-derivation.nix
@@ -204,7 +204,7 @@ let
 
     inherit strictDeps;
 
-    LANG = "${if python.stdenv.isDarwin then "en_US" else "C"}.UTF-8";
+    LANG = "${if python.stdenv.hostPlatform.isDarwin then "en_US" else "C"}.UTF-8";
 
     # Python packages don't have a checkPhase, only an installCheckPhase
     doCheck = false;
diff --git a/pkgs/development/interpreters/python/rustpython/default.nix b/pkgs/development/interpreters/python/rustpython/default.nix
index febb7f5cfa24..98d3ed7c0efb 100644
--- a/pkgs/development/interpreters/python/rustpython/default.nix
+++ b/pkgs/development/interpreters/python/rustpython/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   # freeze the stdlib into the rustpython binary
   cargoBuildFlags = [ "--features=freeze-stdlib" ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ SystemConfiguration ];
 
   nativeCheckInputs = [ python3 ];
 
@@ -41,6 +41,6 @@ rustPlatform.buildRustPackage rec {
     #       "_utimensat", referenced from:
     #           rustpython_vm::function::builtin::IntoPyNativeFn::into_func::... in
     #           rustpython-10386d81555652a7.rustpython_vm-f0b5bedfcf056d0b.rustpython_vm.7926b68e665728ca-cgu.08.rcgu.o.rcgu.o
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/development/interpreters/python/tests.nix b/pkgs/development/interpreters/python/tests.nix
index 99bc38890c6a..6574b6295744 100644
--- a/pkgs/development/interpreters/python/tests.nix
+++ b/pkgs/development/interpreters/python/tests.nix
@@ -38,7 +38,7 @@ let
         is_nixenv = "False";
         is_virtualenv = "False";
       };
-    } // lib.optionalAttrs (!python.isPyPy && !stdenv.isDarwin) {
+    } // lib.optionalAttrs (!python.isPyPy && !stdenv.hostPlatform.isDarwin) {
       # Use virtualenv from a Nix env.
       # Fails on darwin with
       #   virtualenv: error: argument dest: the destination . is not write-able at /nix/store
@@ -106,7 +106,7 @@ let
   # Integration tests involving the package set.
   # All PyPy package builds are broken at the moment
   integrationTests = lib.optionalAttrs (!python.isPyPy) (
-    lib.optionalAttrs (python.isPy3k && !stdenv.isDarwin) { # darwin has no split-debug
+    lib.optionalAttrs (python.isPy3k && !stdenv.hostPlatform.isDarwin) { # darwin has no split-debug
       cpython-gdb = callPackage ./tests/test_cpython_gdb {
         interpreter = python;
       };
@@ -222,7 +222,7 @@ let
       }
     ) {};
     pythonWithRequests = requests.pythonModule.withPackages (ps: [ requests ]);
-    in lib.optionalAttrs (python.isPy3k && stdenv.isLinux)
+    in lib.optionalAttrs (python.isPy3k && stdenv.hostPlatform.isLinux)
     {
       condaExamplePackage = runCommand "import-requests" {} ''
         ${pythonWithRequests.interpreter} -c "import requests" > $out
diff --git a/pkgs/development/interpreters/racket/default.nix b/pkgs/development/interpreters/racket/default.nix
index 6f06b31b56a6..4a16416374ff 100644
--- a/pkgs/development/interpreters/racket/default.nix
+++ b/pkgs/development/interpreters/racket/default.nix
@@ -56,7 +56,7 @@ let
       readline
       sqlite
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       libGL
       libGLU
     ]
@@ -83,7 +83,7 @@ stdenv.mkDerivation rec {
   FONTCONFIG_FILE = fontsConf;
   LD_LIBRARY_PATH = libPath;
   NIX_LDFLAGS = lib.concatStringsSep " " [
-    (lib.optionalString (stdenv.cc.isGNU && !stdenv.isDarwin) "-lgcc_s")
+    (lib.optionalString (stdenv.cc.isGNU && !stdenv.hostPlatform.isDarwin) "-lgcc_s")
   ];
 
   nativeBuildInputs = [
@@ -101,7 +101,7 @@ stdenv.mkDerivation rec {
       gtk3
       ncurses
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       CoreFoundation
     ];
@@ -141,15 +141,15 @@ stdenv.mkDerivation rec {
       cd src/build
 
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       gappsWrapperArgs+=("--prefix"   "LD_LIBRARY_PATH" ":" ${libPath})
       gappsWrapperArgs+=("--set"      "LOCALE_ARCHIVE" "${glibcLocales}/lib/locale/locale-archive")
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       gappsWrapperArgs+=("--prefix" "DYLD_LIBRARY_PATH" ":" ${libPath})
     '';
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Cannot set DYLD_LIBRARY_PATH as an attr of this drv, becasue dynamic
     # linker environment variables like this are purged.
     # See: https://apple.stackexchange.com/a/212954/167199
@@ -163,14 +163,14 @@ stdenv.mkDerivation rec {
     export DYLD_FALLBACK_LIBRARY_PATH="${libPath}"
   '';
 
-  shared = if stdenv.isDarwin then "dylib" else "shared";
+  shared = if stdenv.hostPlatform.isDarwin then "dylib" else "shared";
   configureFlags =
     [
       "--enable-${shared}"
       "--enable-lt=${libtool}/bin/libtool"
     ]
     ++ lib.optionals disableDocs [ "--disable-docs" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "--disable-strip"
       "--enable-xonx"
     ];
@@ -179,7 +179,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = false;
 
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Programmable programming language";
diff --git a/pkgs/development/interpreters/racket/racket_7_9.nix b/pkgs/development/interpreters/racket/racket_7_9.nix
index 91f7654fcad2..c82d232e11a4 100644
--- a/pkgs/development/interpreters/racket/racket_7_9.nix
+++ b/pkgs/development/interpreters/racket/racket_7_9.nix
@@ -76,8 +76,8 @@ stdenv.mkDerivation rec {
   FONTCONFIG_FILE = fontsConf;
   LD_LIBRARY_PATH = libPath;
   NIX_LDFLAGS = lib.concatStringsSep " " [
-    (lib.optionalString (stdenv.cc.isGNU && !stdenv.isDarwin) "-lgcc_s")
-    (lib.optionalString stdenv.isDarwin "-framework CoreFoundation")
+    (lib.optionalString (stdenv.cc.isGNU && !stdenv.hostPlatform.isDarwin) "-lgcc_s")
+    (lib.optionalString stdenv.hostPlatform.isDarwin "-framework CoreFoundation")
   ];
 
   nativeBuildInputs = [
@@ -94,7 +94,7 @@ stdenv.mkDerivation rec {
       gsettings-desktop-schemas
       gtk3
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       CoreFoundation
     ];
@@ -110,14 +110,14 @@ stdenv.mkDerivation rec {
     gappsWrapperArgs+=("--prefix" "LD_LIBRARY_PATH" ":" ${LD_LIBRARY_PATH})
   '';
 
-  shared = if stdenv.isDarwin then "dylib" else "shared";
+  shared = if stdenv.hostPlatform.isDarwin then "dylib" else "shared";
   configureFlags =
     [
       "--enable-${shared}"
       "--enable-lt=${libtool}/bin/libtool"
     ]
     ++ lib.optionals disableDocs [ "--disable-docs" ]
-    ++ lib.optionals stdenv.isDarwin [ "--enable-xonx" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--enable-xonx" ];
 
   configureScript = "../configure";
 
@@ -145,6 +145,6 @@ stdenv.mkDerivation rec {
       "x86_64-linux"
       "aarch64-linux"
     ];
-    broken = stdenv.isDarwin; # No support yet for setting FFI lookup path
+    broken = stdenv.hostPlatform.isDarwin; # No support yet for setting FFI lookup path
   };
 }
diff --git a/pkgs/development/interpreters/rakudo/moarvm.nix b/pkgs/development/interpreters/rakudo/moarvm.nix
index e4b0da036233..5537f13041d7 100644
--- a/pkgs/development/interpreters/rakudo/moarvm.nix
+++ b/pkgs/development/interpreters/rakudo/moarvm.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     patchShebangs .
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Configure.pl \
       --replace '`/usr/bin/arch`' '"${stdenv.hostPlatform.darwinArch}"' \
       --replace '/usr/bin/arch' "$(type -P true)" \
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
       --replace '`sw_vers -productVersion`' '"11.0"'
   '';
 
-  buildInputs = [ perl ] ++ lib.optionals stdenv.isDarwin [ CoreServices ApplicationServices ];
+  buildInputs = [ perl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ApplicationServices ];
   doCheck = false; # MoarVM does not come with its own test suite
 
   configureScript = "${perl}/bin/perl ./Configure.pl";
diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index 596c778c0ff5..369d242192ac 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -78,7 +78,7 @@ let
 
         nativeBuildInputs = [ autoreconfHook bison removeReferencesTo ]
           ++ (op docSupport groff)
-          ++ (ops (dtraceSupport && stdenv.isLinux) [ systemtap libsystemtap ])
+          ++ (ops (dtraceSupport && stdenv.hostPlatform.isLinux) [ systemtap libsystemtap ])
           ++ ops yjitSupport [ rustPlatform.cargoSetupHook cargo rustc ]
           ++ op useBaseRuby baseRuby;
         buildInputs = [ autoconf ]
@@ -92,8 +92,8 @@ let
           # support is not enabled, so add readline to the build inputs if curses
           # support is disabled (if it's enabled, we already have it) and we're
           # running on darwin
-          ++ op (!cursesSupport && stdenv.isDarwin) readline
-          ++ ops stdenv.isDarwin [ libiconv libobjc libunwind Foundation ];
+          ++ op (!cursesSupport && stdenv.hostPlatform.isDarwin) readline
+          ++ ops stdenv.hostPlatform.isDarwin [ libiconv libobjc libunwind Foundation ];
         propagatedBuildInputs = op jemallocSupport jemalloc;
 
         enableParallelBuilding = true;
@@ -156,7 +156,7 @@ let
           # overrides that by enabling `-O2` which is the minimum optimization
           # needed for `_FORTIFY_SOURCE`.
         ] ++ lib.optional stdenv.cc.isGNU "CFLAGS=-O3" ++ [
-        ] ++ ops stdenv.isDarwin [
+        ] ++ ops stdenv.hostPlatform.isDarwin [
           # on darwin, we have /usr/include/tk.h -- so the configure script detects
           # that tk is installed
           "--with-out-ext=tk"
diff --git a/pkgs/development/interpreters/rune/default.nix b/pkgs/development/interpreters/rune/default.nix
index f4dc8ef1f745..41d61aa9cc8b 100644
--- a/pkgs/development/interpreters/rune/default.nix
+++ b/pkgs/development/interpreters/rune/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-yMqxd7PlpEEVS0jJwProaVjKUsU5TuebGTMrWiMFsM8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/interpreters/snobol4/default.nix b/pkgs/development/interpreters/snobol4/default.nix
index 2d276e6a0362..c0edda03dc64 100644
--- a/pkgs/development/interpreters/snobol4/default.nix
+++ b/pkgs/development/interpreters/snobol4/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   # enable all features (undocumented, based on manual review of configure script)
   buildInputs = [ bzip2 libffi openssl readline sqlite tcl xz zlib ]
     # ndbm compat library
-    ++ lib.optional stdenv.isLinux gdbm;
+    ++ lib.optional stdenv.hostPlatform.isLinux gdbm;
   configureFlags = lib.optional (tcl != null) "--with-tcl=${tcl}/lib/tclConfig.sh";
 
   # INSTALL says "parallel make will fail"
diff --git a/pkgs/development/interpreters/spidermonkey/common.nix b/pkgs/development/interpreters/spidermonkey/common.nix
index cc1d3923fef9..5feca82f6cf1 100644
--- a/pkgs/development/interpreters/spidermonkey/common.nix
+++ b/pkgs/development/interpreters/spidermonkey/common.nix
@@ -106,7 +106,7 @@ stdenv.mkDerivation (finalAttrs: rec {
   ] ++ lib.optionals (lib.versionOlder version "91") [
     autoconf213
     yasm # to buid icu? seems weird
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     xcbuild
   ];
 
@@ -115,7 +115,7 @@ stdenv.mkDerivation (finalAttrs: rec {
     nspr
     readline
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libobjc
     libiconv
   ];
@@ -213,7 +213,7 @@ stdenv.mkDerivation (finalAttrs: rec {
     homepage = "https://spidermonkey.dev/";
     license = licenses.mpl20; # TODO: MPL/GPL/LGPL tri-license for 78.
     maintainers = with maintainers; [ abbradar lostnet catap ];
-    broken = stdenv.isDarwin && versionAtLeast version "115"; # Requires SDK 13.3 (see #242666).
+    broken = stdenv.hostPlatform.isDarwin && versionAtLeast version "115"; # Requires SDK 13.3 (see #242666).
     platforms = platforms.unix;
   };
 })
diff --git a/pkgs/development/interpreters/supercollider/default.nix b/pkgs/development/interpreters/supercollider/default.nix
index 7eb0de6f689f..344d00703164 100644
--- a/pkgs/development/interpreters/supercollider/default.nix
+++ b/pkgs/development/interpreters/supercollider/default.nix
@@ -29,7 +29,7 @@ mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config qttools ];
 
   buildInputs = [ gcc libjack2 libsndfile fftw curl libXt qtbase qtwebengine qtwebsockets readline ]
-    ++ lib.optional (!stdenv.isDarwin) alsa-lib
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) alsa-lib
     ++ lib.optional useSCEL emacs;
 
   hardeningDisable = [ "stackprotector" ];
diff --git a/pkgs/development/interpreters/tcl/generic.nix b/pkgs/development/interpreters/tcl/generic.nix
index 63eafd9c3e81..5df6fb28a304 100644
--- a/pkgs/development/interpreters/tcl/generic.nix
+++ b/pkgs/development/interpreters/tcl/generic.nix
@@ -36,7 +36,7 @@ let
         # Don't install tzdata because NixOS already has a more up-to-date copy.
         "--with-tzdata=no"
         "tcl_cv_strtod_unbroken=ok"
-      ] ++ lib.optional stdenv.is64bit "--enable-64bit";
+      ] ++ lib.optional stdenv.hostPlatform.is64bit "--enable-64bit";
 
       enableParallelBuilding = true;
 
diff --git a/pkgs/development/interpreters/tclreadline/default.nix b/pkgs/development/interpreters/tclreadline/default.nix
index de671bab5739..de5f3174506b 100644
--- a/pkgs/development/interpreters/tclreadline/default.nix
+++ b/pkgs/development/interpreters/tclreadline/default.nix
@@ -41,7 +41,7 @@ tcl.mkTclDerivation rec {
 
   # The provided makefile leaves a wrong reference to /build/ in RPATH,
   # so we fix it after checking that everything is also present in $out
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     needed_libraries=$(ls .libs | grep '\.\(so\|la\)$')
     for lib in $needed_libraries; do
       if ! ls $out/lib | grep "$lib"; then
diff --git a/pkgs/development/interpreters/unicon-lang/default.nix b/pkgs/development/interpreters/unicon-lang/default.nix
index f0a45495d70d..4435b9c02925 100644
--- a/pkgs/development/interpreters/unicon-lang/default.nix
+++ b/pkgs/development/interpreters/unicon-lang/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Very high level, goal-directed, object-oriented, general purpose applications language";
     maintainers = [ ];
     platforms = platforms.linux;
diff --git a/pkgs/development/interpreters/wamr/default.nix b/pkgs/development/interpreters/wamr/default.nix
index e5b9b904a061..36a484b2ddce 100644
--- a/pkgs/development/interpreters/wamr/default.nix
+++ b/pkgs/development/interpreters/wamr/default.nix
@@ -17,14 +17,14 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ cmake ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=${stdenv.hostPlatform.darwinSdkVersion}"
   ];
 
   sourceRoot = let
-    platform = if stdenv.isLinux then
+    platform = if stdenv.hostPlatform.isLinux then
         "linux"
-      else if stdenv.isDarwin then
+      else if stdenv.hostPlatform.isDarwin then
         "darwin"
       else throw "unsupported platform";
   in "${finalAttrs.src.name}/product-mini/platforms/${platform}";
diff --git a/pkgs/development/interpreters/wasmer/default.nix b/pkgs/development/interpreters/wasmer/default.nix
index 2256851c3d2f..64ff6306d2ee 100644
--- a/pkgs/development/interpreters/wasmer/default.nix
+++ b/pkgs/development/interpreters/wasmer/default.nix
@@ -8,8 +8,8 @@
 , CoreFoundation
 , SystemConfiguration
 , Security
-, withLLVM ? !stdenv.isDarwin
-, withSinglepass ? !(stdenv.isDarwin && stdenv.isx86_64)
+, withLLVM ? !stdenv.hostPlatform.isDarwin
+, withSinglepass ? !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64)
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     llvmPackages.llvm
     libffi
     libxml2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     SystemConfiguration
     Security
diff --git a/pkgs/development/interpreters/wasmtime/default.nix b/pkgs/development/interpreters/wasmtime/default.nix
index 19b309208bc7..dc4bfced92cb 100644
--- a/pkgs/development/interpreters/wasmtime/default.nix
+++ b/pkgs/development/interpreters/wasmtime/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   outputs = [ "out" "dev" ];
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # rustfmt is brought into scope to fix the following
   #   warning: cranelift-codegen@0.108.0:
@@ -45,7 +45,7 @@ rustPlatform.buildRustPackage rec {
     install -d -m0755 $dev/include/wasmtime
     install -m0644 $src/crates/c-api/include/*.h $dev/include
     install -m0644 $src/crates/c-api/include/wasmtime/*.h $dev/include/wasmtime
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id \
       $dev/lib/libwasmtime.dylib \
       $dev/lib/libwasmtime.dylib
diff --git a/pkgs/development/libraries/SDL2/default.nix b/pkgs/development/libraries/SDL2/default.nix
index 3b423e79ed13..bc7ffd7b991b 100644
--- a/pkgs/development/libraries/SDL2/default.nix
+++ b/pkgs/development/libraries/SDL2/default.nix
@@ -8,7 +8,7 @@
   libGLSupported ? lib.elem stdenv.hostPlatform.system mesa.meta.platforms,
   openglSupport ? libGLSupported,
   libGL,
-  alsaSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  alsaSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   alsa-lib,
   x11Support ? !stdenv.hostPlatform.isWindows && !stdenv.hostPlatform.isAndroid,
   libX11,
@@ -21,7 +21,7 @@
   libXext,
   libXxf86vm,
   libXrandr,
-  waylandSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  waylandSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   wayland,
   wayland-protocols,
   wayland-scanner,
@@ -29,17 +29,17 @@
   libdrm,
   mesa,
   libxkbcommon,
-  dbusSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  dbusSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   dbus,
-  udevSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  udevSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   udev,
   ibusSupport ? false,
   ibus,
-  libdecorSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  libdecorSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   libdecor,
-  pipewireSupport ? stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  pipewireSupport ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   pipewire, # NOTE: must be built with SDL2 without pipewire support
-  pulseaudioSupport ? config.pulseaudio or stdenv.isLinux && !stdenv.hostPlatform.isAndroid,
+  pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isAndroid,
   libpulseaudio,
   AudioUnit,
   Cocoa,
@@ -112,7 +112,7 @@ stdenv.mkDerivation (finalAttrs: {
   dlopenPropagatedBuildInputs =
     [ ]
     # Propagated for #include <GLES/gl.h> in SDL_opengles.h.
-    ++ lib.optional (openglSupport && !stdenv.isDarwin) libGL
+    ++ lib.optional (openglSupport && !stdenv.hostPlatform.isDarwin) libGL
     # Propagated for #include <X11/Xlib.h> and <X11/Xatom.h> in SDL_syswm.h.
     ++ lib.optionals x11Support [ libX11 ];
 
@@ -153,7 +153,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ finalAttrs.dlopenBuildInputs
     ++ lib.optional ibusSupport ibus
     ++ lib.optionals waylandSupport [ wayland-protocols ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       AudioUnit
       Cocoa
       CoreAudio
@@ -169,7 +169,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional (!x11Support) "--without-x"
     ++ lib.optional alsaSupport "--with-alsa-prefix=${alsa-lib.out}/lib"
     ++ lib.optional stdenv.hostPlatform.isWindows "--disable-video-opengles"
-    ++ lib.optional stdenv.isDarwin "--disable-sdltest";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-sdltest";
 
   # We remove libtool .la files when static libs are requested,
   # because they make the builds of downstream libs like `SDL_tff`
diff --git a/pkgs/development/libraries/aalib/default.nix b/pkgs/development/libraries/aalib/default.nix
index 903364ea27f6..3ba1620fe8f3 100644
--- a/pkgs/development/libraries/aalib/default.nix
+++ b/pkgs/development/libraries/aalib/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   setOutputFlags = false; # Doesn't support all the flags
 
   patches = [ ./clang.patch ] # Fix implicit `int` on `main` error with newer versions of clang
-    ++ lib.optionals stdenv.isDarwin [ ./darwin.patch ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ ./darwin.patch ];
 
   # The fuloong2f is not supported by aalib still
   preConfigure = ''
diff --git a/pkgs/development/libraries/abseil-cpp/202103.nix b/pkgs/development/libraries/abseil-cpp/202103.nix
index 04af3153719a..0dfd60d17507 100644
--- a/pkgs/development/libraries/abseil-cpp/202103.nix
+++ b/pkgs/development/libraries/abseil-cpp/202103.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
       url = "https://github.com/abseil/abseil-cpp/commit/808bc202fc13e85a7948db0d7fb58f0f051200b1.patch";
       sha256 = "sha256-ayY/aV/xWOdEyFSDqV7B5WDGvZ0ASr/aeBeYwP5RZVc=";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Don’t propagate the path to CoreFoundation. Otherwise, it’s impossible to build packages
     # that require a different SDK other than the default one.
     ./cmake-core-foundation.patch
diff --git a/pkgs/development/libraries/abseil-cpp/202301.nix b/pkgs/development/libraries/abseil-cpp/202301.nix
index 62d98d77a38f..502437280246 100644
--- a/pkgs/development/libraries/abseil-cpp/202301.nix
+++ b/pkgs/development/libraries/abseil-cpp/202301.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-7C/QIXYRyUyNVVE0tqmv8b5g/uWc58iBI5jzdtddQ+U=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     # Don’t propagate the path to CoreFoundation. Otherwise, it’s impossible to build packages
     # that require a different SDK other than the default one.
     ./cmake-core-foundation.patch
diff --git a/pkgs/development/libraries/adns/default.nix b/pkgs/development/libraries/adns/default.nix
index 60de8957d088..eeb6c07bf11d 100644
--- a/pkgs/development/libraries/adns/default.nix
+++ b/pkgs/development/libraries/adns/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   configureFlags = lib.optional stdenv.hostPlatform.isStatic "--disable-dynamic";
 
   preConfigure =
-    lib.optionalString stdenv.isDarwin "sed -i -e 's|-Wl,-soname=$(SHLIBSONAME)||' configure";
+    lib.optionalString stdenv.hostPlatform.isDarwin "sed -i -e 's|-Wl,-soname=$(SHLIBSONAME)||' configure";
 
   # Autogenerated headers miss interdependencies in Makefile, fail parallel build:
   #  https://debbugs.gnu.org/cgi/bugreport.cgi?bug=51329
@@ -27,12 +27,12 @@ stdenv.mkDerivation rec {
   doCheck = false;
 
   postInstall = let suffix = lib.versions.majorMinor version;
-  in lib.optionalString stdenv.isDarwin ''
+  in lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libadns.so.${suffix} $out/lib/libadns.so.${suffix}
   '';
 
   # darwin executables fail, but I don't want to fail the 100-500 packages depending on this lib
-  doInstallCheck = !stdenv.isDarwin;
+  doInstallCheck = !stdenv.hostPlatform.isDarwin;
   installCheckPhase = ''
     set -eo pipefail
 
diff --git a/pkgs/development/libraries/aemu/default.nix b/pkgs/development/libraries/aemu/default.nix
index 0a2f6fa8b8b2..c39c68cbce1e 100644
--- a/pkgs/development/libraries/aemu/default.nix
+++ b/pkgs/development/libraries/aemu/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   ];
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
diff --git a/pkgs/development/libraries/afflib/default.nix b/pkgs/development/libraries/afflib/default.nix
index e82c3c8dfe77..eff94a276cd8 100644
--- a/pkgs/development/libraries/afflib/default.nix
+++ b/pkgs/development/libraries/afflib/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ zlib curl expat openssl python3 ]
     ++ lib.optionals (with stdenv; isLinux || isDarwin) [ fuse ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   meta = {
     homepage = "http://afflib.sourceforge.net/";
diff --git a/pkgs/development/libraries/agg/default.nix b/pkgs/development/libraries/agg/default.nix
index bfa7449b04c6..020c2dce95d8 100644
--- a/pkgs/development/libraries/agg/default.nix
+++ b/pkgs/development/libraries/agg/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     freetype
     SDL
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
   ];
 
@@ -33,9 +33,9 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags = [
-    (lib.strings.enableFeature stdenv.isLinux "platform")
+    (lib.strings.enableFeature stdenv.hostPlatform.isLinux "platform")
     "--enable-examples=no"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--x-includes=${lib.getDev libX11}/include"
     "--x-libraries=${lib.getLib libX11}/lib"
   ];
diff --git a/pkgs/development/libraries/allegro/5.nix b/pkgs/development/libraries/allegro/5.nix
index 94dd96dae0e7..ee337673ee07 100644
--- a/pkgs/development/libraries/allegro/5.nix
+++ b/pkgs/development/libraries/allegro/5.nix
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
     physfs
     texinfo
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     libpthreadstubs
     libpulseaudio
diff --git a/pkgs/development/libraries/aml/default.nix b/pkgs/development/libraries/aml/default.nix
index 1a6900d298c6..19f3b2826223 100644
--- a/pkgs/development/libraries/aml/default.nix
+++ b/pkgs/development/libraries/aml/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation rec {
     license = licenses.isc;
     platforms = platforms.unix;
     maintainers = with maintainers; [ primeos ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/apr-util/default.nix b/pkgs/development/libraries/apr-util/default.nix
index 9490ff1fb6a3..ea7c9cf8c168 100644
--- a/pkgs/development/libraries/apr-util/default.nix
+++ b/pkgs/development/libraries/apr-util/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, makeWrapper, apr, expat, gnused
 , sslSupport ? true, openssl
 , bdbSupport ? true, db
-, ldapSupport ? !stdenv.isCygwin, openldap
+, ldapSupport ? !stdenv.hostPlatform.isCygwin, openldap
 , libiconv, libxcrypt
 , cyrus_sasl, autoreconfHook
 }:
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     ./fix-libxcrypt-build.patch
     # Fix incorrect Berkeley DB detection with newer versions of clang due to implicit `int` on main errors.
     ./clang-bdb.patch
-  ] ++ lib.optional stdenv.isFreeBSD ./include-static-dependencies.patch;
+  ] ++ lib.optional stdenv.hostPlatform.isFreeBSD ./include-static-dependencies.patch;
 
   NIX_CFLAGS_LINK = [ "-lcrypt" ];
 
@@ -33,11 +33,11 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ makeWrapper autoreconfHook ];
 
   configureFlags = [ "--with-apr=${apr.dev}" "--with-expat=${expat.dev}" ]
-    ++ lib.optional (!stdenv.isCygwin) "--with-crypto"
+    ++ lib.optional (!stdenv.hostPlatform.isCygwin) "--with-crypto"
     ++ lib.optional sslSupport "--with-openssl=${openssl.dev}"
     ++ lib.optional bdbSupport "--with-berkeley-db=${db.dev}"
     ++ lib.optional ldapSupport "--with-ldap=ldap"
-    ++ lib.optionals stdenv.isCygwin
+    ++ lib.optionals stdenv.hostPlatform.isCygwin
       [ "--without-pgsql" "--without-sqlite2" "--without-sqlite3"
         "--without-freetds" "--without-berkeley-db" "--without-crypto" ]
     ;
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional sslSupport openssl
     ++ lib.optional bdbSupport db
     ++ lib.optional ldapSupport openldap
-    ++ lib.optional stdenv.isFreeBSD cyrus_sasl;
+    ++ lib.optional stdenv.hostPlatform.isFreeBSD cyrus_sasl;
 
   postInstall = ''
     for f in $out/lib/*.la $out/lib/apr-util-1/*.la $dev/bin/apu-1-config; do
diff --git a/pkgs/development/libraries/aribb25/default.nix b/pkgs/development/libraries/aribb25/default.nix
index 743850c5fdc3..4079f6278235 100644
--- a/pkgs/development/libraries/aribb25/default.nix
+++ b/pkgs/development/libraries/aribb25/default.nix
@@ -26,8 +26,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     autoreconfHook
     pkg-config
-  ] ++ lib.optional stdenv.isDarwin xcbuild;
-  buildInputs = if stdenv.isDarwin then [ PCSC ] else [ pcsclite ];
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin xcbuild;
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ PCSC ] else [ pcsclite ];
 
   patches = let
     url = commit: "https://code.videolan.org/videolan/${pname}/-/commit/${commit}.diff";
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildFlags =
-    lib.optional stdenv.isDarwin "pcsclite_CFLAGS=-I${PCSC}/Library/Frameworks/PCSC.framework/Headers";
+    lib.optional stdenv.hostPlatform.isDarwin "pcsclite_CFLAGS=-I${PCSC}/Library/Frameworks/PCSC.framework/Headers";
 
   meta = with lib; {
     description = "Sample implementation of the ARIB STD-B25 standard";
diff --git a/pkgs/development/libraries/arrayfire/default.nix b/pkgs/development/libraries/arrayfire/default.nix
index 5ea144ef9bc3..eb928f99e88a 100644
--- a/pkgs/development/libraries/arrayfire/default.nix
+++ b/pkgs/development/libraries/arrayfire/default.nix
@@ -29,7 +29,7 @@
 , cpuSupport ? true
 , cudaSupport ? config.cudaSupport
   # OpenCL needs mesa which is broken on Darwin
-, openclSupport ? !stdenv.isDarwin
+, openclSupport ? !stdenv.hostPlatform.isDarwin
   # This argument lets one run CUDA & OpenCL tests on non-NixOS systems by
   # telling Nix where to find the drivers. If you know the version of the
   # Nvidia driver that is installed on your system, you can do:
diff --git a/pkgs/development/libraries/asio/generic.nix b/pkgs/development/libraries/asio/generic.nix
index cb9f1eb30246..44dd9e056874 100644
--- a/pkgs/development/libraries/asio/generic.nix
+++ b/pkgs/development/libraries/asio/generic.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
     homepage = "http://asio.sourceforge.net/";
     description = "Cross-platform C++ library for network and low-level I/O programming";
     license = licenses.boost;
-    broken = stdenv.isDarwin && lib.versionOlder version "1.16.1";
+    broken = stdenv.hostPlatform.isDarwin && lib.versionOlder version "1.16.1";
     platforms = platforms.unix;
   };
 }
diff --git a/pkgs/development/libraries/audio/cubeb/default.nix b/pkgs/development/libraries/audio/cubeb/default.nix
index dd7033b1910e..478e8478382a 100644
--- a/pkgs/development/libraries/audio/cubeb/default.nix
+++ b/pkgs/development/libraries/audio/cubeb/default.nix
@@ -9,10 +9,10 @@
 , AudioUnit
 , CoreAudio
 , CoreServices
-, lazyLoad ? !stdenv.isDarwin
+, lazyLoad ? !stdenv.hostPlatform.isDarwin
 }:
 
-assert lib.assertMsg (stdenv.isDarwin -> !lazyLoad) "cubeb: lazyLoad is inert on Darwin";
+assert lib.assertMsg (stdenv.hostPlatform.isDarwin -> !lazyLoad) "cubeb: lazyLoad is inert on Darwin";
 
 let
   backendLibs = [
@@ -39,7 +39,7 @@ in stdenv.mkDerivation {
   ];
 
   buildInputs = [ speexdsp ] ++ (
-    if stdenv.isDarwin then [ AudioUnit CoreAudio CoreServices ]
+    if stdenv.hostPlatform.isDarwin then [ AudioUnit CoreAudio CoreServices ]
     else backendLibs
   );
 
diff --git a/pkgs/development/libraries/audio/game-music-emu/default.nix b/pkgs/development/libraries/audio/game-music-emu/default.nix
index 94b8d1cbc375..050f47545438 100644
--- a/pkgs/development/libraries/audio/game-music-emu/default.nix
+++ b/pkgs/development/libraries/audio/game-music-emu/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   # it doesn't.
   disallowedReferences = [ stdenv.cc.cc ];
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     remove-references-to -t ${stdenv.cc.cc} "$(readlink -f $out/lib/libgme.so)"
   '';
 
diff --git a/pkgs/development/libraries/audio/libopenmpt/default.nix b/pkgs/development/libraries/audio/libopenmpt/default.nix
index a08b93a9b0e5..500533ce8203 100644
--- a/pkgs/development/libraries/audio/libopenmpt/default.nix
+++ b/pkgs/development/libraries/audio/libopenmpt/default.nix
@@ -10,7 +10,7 @@
 , portaudio
 , libsndfile
 , flac
-, usePulseAudio ? config.pulseaudio or stdenv.isLinux
+, usePulseAudio ? config.pulseaudio or stdenv.hostPlatform.isLinux
 , libpulseaudio
 }:
 
diff --git a/pkgs/development/libraries/audio/lv2/default.nix b/pkgs/development/libraries/audio/lv2/default.nix
index 8391c93cc594..c9ddffbff227 100644
--- a/pkgs/development/libraries/audio/lv2/default.nix
+++ b/pkgs/development/libraries/audio/lv2/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     "-Dtests=disabled"
     # Avoid heavyweight python dependencies.
     "-Ddocs=disabled"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-Dlv2dir=${placeholder "out"}/lib/lv2"
   ];
 
diff --git a/pkgs/development/libraries/audio/suil/default.nix b/pkgs/development/libraries/audio/suil/default.nix
index 350adc8a4583..099c3ca42793 100644
--- a/pkgs/development/libraries/audio/suil/default.nix
+++ b/pkgs/development/libraries/audio/suil/default.nix
@@ -18,7 +18,7 @@
   gtk3,
   withQt5 ? true,
   qt5,
-  withX11 ? !stdenv.isDarwin,
+  withX11 ? !stdenv.hostPlatform.isDarwin,
 }:
 
 let
diff --git a/pkgs/development/libraries/audiofile/default.nix b/pkgs/development/libraries/audiofile/default.nix
index f9974e2ca253..3a65f2535b7c 100644
--- a/pkgs/development/libraries/audiofile/default.nix
+++ b/pkgs/development/libraries/audiofile/default.nix
@@ -15,9 +15,9 @@ stdenv.mkDerivation rec {
   version = "0.3.6";
 
   buildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       alsa-lib
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreServices AudioUnit
     ];
 
diff --git a/pkgs/development/libraries/avahi/default.nix b/pkgs/development/libraries/avahi/default.nix
index 95f82d8def2b..3e9be1f5fc71 100644
--- a/pkgs/development/libraries/avahi/default.nix
+++ b/pkgs/development/libraries/avahi/default.nix
@@ -141,7 +141,7 @@ stdenv.mkDerivation rec {
     expat
     libiconv
     libevent
-  ] ++ lib.optionals stdenv.isFreeBSD [
+  ] ++ lib.optionals stdenv.hostPlatform.isFreeBSD [
     libpcap
   ] ++ lib.optionals gtk3Support [
     gtk3
@@ -171,7 +171,7 @@ stdenv.mkDerivation rec {
     "--with-systemdsystemunitdir=no"
   ] ++ lib.optionals withLibdnssdCompat [
     "--enable-compat-libdns_sd"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # autoipd won't build on darwin
     "--disable-autoipd"
   ];
@@ -183,7 +183,7 @@ stdenv.mkDerivation rec {
     "sysconfdir=${placeholder "out"}/etc"
   ];
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i '20 i\
     #define __APPLE_USE_RFC_2292' \
     avahi-core/socket.c
diff --git a/pkgs/development/libraries/aws-sdk-cpp/default.nix b/pkgs/development/libraries/aws-sdk-cpp/default.nix
index 631c5a90faf5..6e549526a14c 100644
--- a/pkgs/development/libraries/aws-sdk-cpp/default.nix
+++ b/pkgs/development/libraries/aws-sdk-cpp/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
     rm tests/aws-cpp-sdk-core-tests/aws/auth/AWSAuthSignerTest.cpp
     # TestRandomURLMultiThreaded fails
     rm tests/aws-cpp-sdk-core-tests/http/HttpClientTest.cpp
-  '' + lib.optionalString stdenv.isi686 ''
+  '' + lib.optionalString stdenv.hostPlatform.isi686 ''
     # EPSILON is exceeded
     rm tests/aws-cpp-sdk-core-tests/aws/client/AdaptiveRetryStrategyTest.cpp
   '';
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     curl openssl zlib
-  ] ++ lib.optionals (stdenv.isDarwin &&
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin &&
                         ((builtins.elem "text-to-speech" apis) ||
                          (builtins.elem "*" apis)))
          [ CoreAudio AudioToolbox ];
diff --git a/pkgs/development/libraries/azmq/default.nix b/pkgs/development/libraries/azmq/default.nix
index 7317c51aabde..83bbd9f98f9e 100644
--- a/pkgs/development/libraries/azmq/default.nix
+++ b/pkgs/development/libraries/azmq/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
   ];
 
   # Broken for some reason on this platform.
-  doCheck = !(stdenv.isAarch64 && stdenv.isLinux);
+  doCheck = !(stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux);
 
   meta = with lib; {
     homepage = "https://github.com/zeromq/azmq";
diff --git a/pkgs/development/libraries/blitz/default.nix b/pkgs/development/libraries/blitz/default.nix
index d48669845485..4351e0ac729c 100644
--- a/pkgs/development/libraries/blitz/default.nix
+++ b/pkgs/development/libraries/blitz/default.nix
@@ -54,11 +54,11 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = optional enablePadding "-DARRAY_LENGTH_PADDING=ON"
     ++ optional enableSerialization "-DENABLE_SERIALISATION=ON"
-    ++ optional stdenv.is64bit "-DBZ_FULLY64BIT=ON";
+    ++ optional stdenv.hostPlatform.is64bit "-DBZ_FULLY64BIT=ON";
     # FIXME ++ optional doCheck "-DBUILD_TESTING=ON";
 
   # skip broken library name detection
-  ax_boost_user_serialization_lib = lib.optionalString stdenv.isDarwin "boost_serialization";
+  ax_boost_user_serialization_lib = lib.optionalString stdenv.hostPlatform.isDarwin "boost_serialization";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/blst/default.nix b/pkgs/development/libraries/blst/default.nix
index 2bf2e2c614e7..50d080b9bf91 100644
--- a/pkgs/development/libraries/blst/default.nix
+++ b/pkgs/development/libraries/blst/default.nix
@@ -59,9 +59,9 @@ stdenv.mkDerivation ( finalAttrs: {
 
   # ensure we have the right install id set.  Otherwise the library
   # wouldn't be found during install.  The alternative would be to work
-  # lib.optional stdenv.isDarwin "LDFLAGS=-Wl,-install_name,$(out)/lib/libblst.dylib";
+  # lib.optional stdenv.hostPlatform.isDarwin "LDFLAGS=-Wl,-install_name,$(out)/lib/libblst.dylib";
   # into the setup.sh
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libblst.dylib $out/lib/libblst.dylib
   '';
 
diff --git a/pkgs/development/libraries/boost/generic.nix b/pkgs/development/libraries/boost/generic.nix
index 4362bdcb6dab..9c6fb3e67203 100644
--- a/pkgs/development/libraries/boost/generic.nix
+++ b/pkgs/development/libraries/boost/generic.nix
@@ -52,7 +52,7 @@ let
   # To avoid library name collisions
   layout = if taggedLayout then "tagged" else "system";
 
-  needUserConfig = stdenv.hostPlatform != stdenv.buildPlatform || useMpi || (stdenv.isDarwin && enableShared);
+  needUserConfig = stdenv.hostPlatform != stdenv.buildPlatform || useMpi || (stdenv.hostPlatform.isDarwin && enableShared);
 
   b2Args = lib.concatStringsSep " " ([
     "--includedir=$dev/include"
@@ -107,7 +107,7 @@ stdenv.mkDerivation {
   patchFlags = [];
 
   patches = patches
-  ++ lib.optional stdenv.isDarwin ./darwin-no-system-python.patch
+  ++ lib.optional stdenv.hostPlatform.isDarwin ./darwin-no-system-python.patch
   ++ [ ./cmake-paths-173.patch ]
   ++ lib.optional (version == "1.77.0") (fetchpatch {
     url = "https://github.com/boostorg/math/commit/7d482f6ebc356e6ec455ccb5f51a23971bf6ce5b.patch";
@@ -177,7 +177,7 @@ stdenv.mkDerivation {
   # On darwin we need to add the `$out/lib` to the libraries' rpath explicitly,
   # otherwise the dynamic linker is unable to resolve the reference to @rpath
   # when the boost libraries want to load each other at runtime.
-  + lib.optionalString (stdenv.isDarwin && enableShared) ''
+  + lib.optionalString (stdenv.hostPlatform.isDarwin && enableShared) ''
     cat << EOF >> user-config.jam
     using clang-darwin : : ${stdenv.cc.targetPrefix}c++
       : <linkflags>"-rpath $out/lib/"
@@ -214,7 +214,7 @@ stdenv.mkDerivation {
   '';
 
   env = {
-    NIX_CFLAGS_LINK = lib.optionalString stdenv.isDarwin "-headerpad_max_install_names";
+    NIX_CFLAGS_LINK = lib.optionalString stdenv.hostPlatform.isDarwin "-headerpad_max_install_names";
     # copyPkgconfigItems will substitute these in the pkg-config file
     includedir = "${placeholder "dev"}/include";
     libdir = "${placeholder "out"}/lib";
diff --git a/pkgs/development/libraries/boringssl/default.nix b/pkgs/development/libraries/boringssl/default.nix
index 9bb0967bd5c6..01c3884c428f 100644
--- a/pkgs/development/libraries/boringssl/default.nix
+++ b/pkgs/development/libraries/boringssl/default.nix
@@ -41,7 +41,7 @@ buildGoModule {
   '';
 
   # CMAKE_OSX_ARCHITECTURES is set to x86_64 by Nix, but it confuses boringssl on aarch64-linux.
-  cmakeFlags = [ "-GNinja" ] ++ lib.optionals (stdenv.isLinux) [ "-DCMAKE_OSX_ARCHITECTURES=" ];
+  cmakeFlags = [ "-GNinja" ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [ "-DCMAKE_OSX_ARCHITECTURES=" ];
 
   installPhase = ''
     mkdir -p $bin/bin $dev $out/lib
diff --git a/pkgs/development/libraries/botan/default.nix b/pkgs/development/libraries/botan/default.nix
index 81c38c2d982b..976144b1b5ca 100644
--- a/pkgs/development/libraries/botan/default.nix
+++ b/pkgs/development/libraries/botan/default.nix
@@ -50,7 +50,7 @@ let
           bzip2
           zlib
         ]
-        ++ lib.optionals stdenv.isDarwin (
+        ++ lib.optionals stdenv.hostPlatform.isDarwin (
           with darwin.apple_sdk.frameworks;
           [
             CoreServices
diff --git a/pkgs/development/libraries/box2d/default.nix b/pkgs/development/libraries/box2d/default.nix
index a445a0c53315..acc2d96caf4a 100644
--- a/pkgs/development/libraries/box2d/default.nix
+++ b/pkgs/development/libraries/box2d/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
     libXrandr
     xorgproto
     libXi
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     Carbon Cocoa Kernel OpenGL
   ];
 
diff --git a/pkgs/development/libraries/brunsli/default.nix b/pkgs/development/libraries/brunsli/default.nix
index 03c9b02f7f9f..e9d379a74d31 100644
--- a/pkgs/development/libraries/brunsli/default.nix
+++ b/pkgs/development/libraries/brunsli/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     rm -r third_party
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     rm -r build
   '';
 
diff --git a/pkgs/development/libraries/bullet/default.nix b/pkgs/development/libraries/bullet/default.nix
index 5ba9186dcac9..4a161423c7d3 100644
--- a/pkgs/development/libraries/bullet/default.nix
+++ b/pkgs/development/libraries/bullet/default.nix
@@ -21,13 +21,13 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optionals stdenv.isLinux [ libGLU libGL libglut ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa OpenGL ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libGLU libGL libglut ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa OpenGL ];
 
   postPatch = ''
     substituteInPlace examples/ThirdPartyLibs/Gwen/CMakeLists.txt \
       --replace "-DGLEW_STATIC" "-DGLEW_STATIC -Wno-narrowing"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's/FIND_PACKAGE(OpenGL)//' CMakeLists.txt
     sed -i 's/FIND_LIBRARY(COCOA_LIBRARY Cocoa)//' CMakeLists.txt
   '';
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     "-DBUILD_SHARED_LIBS=ON"
     "-DBUILD_CPU_DEMOS=OFF"
     "-DINSTALL_EXTRA_LIBS=ON"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOPENGL_FOUND=true"
     "-DOPENGL_LIBRARIES=${OpenGL}/Library/Frameworks/OpenGL.framework"
     "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks/OpenGL.framework"
diff --git a/pkgs/development/libraries/bullet/roboschool-fork.nix b/pkgs/development/libraries/bullet/roboschool-fork.nix
index c5f6f3a436d2..bcc963f5b466 100644
--- a/pkgs/development/libraries/bullet/roboschool-fork.nix
+++ b/pkgs/development/libraries/bullet/roboschool-fork.nix
@@ -18,12 +18,12 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optionals stdenv.isLinux [ libGLU libGL libglut ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa OpenGL ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libGLU libGL libglut ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa OpenGL ];
 
   patches = [ ./gwen-narrowing.patch ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's/FIND_PACKAGE(OpenGL)//' CMakeLists.txt
     sed -i 's/FIND_LIBRARY(COCOA_LIBRARY Cocoa)//' CMakeLists.txt
   '';
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
     "-DBUILD_SHARED_LIBS=ON"
     "-DBUILD_CPU_DEMOS=OFF"
     "-DINSTALL_EXTRA_LIBS=ON"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOPENGL_FOUND=true"
     "-DOPENGL_LIBRARIES=${OpenGL}/Library/Frameworks/OpenGL.framework"
     "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks/OpenGL.framework"
@@ -53,6 +53,6 @@ stdenv.mkDerivation {
     platforms = platforms.unix;
     # /tmp/nix-build-bullet-2019-03-27.drv-0/source/src/Bullet3Common/b3Vector3.h:297:7: error: argument value 10880 is outside the valid range [0, 255] [-Wargument-outside-range]
     #                 y = b3_splat_ps(y, 0x80);
-    broken = (stdenv.isDarwin && stdenv.isx86_64);
+    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64);
   };
 }
diff --git a/pkgs/development/libraries/caf/default.nix b/pkgs/development/libraries/caf/default.nix
index 854032d56157..9180457a3165 100644
--- a/pkgs/development/libraries/caf/default.nix
+++ b/pkgs/development/libraries/caf/default.nix
@@ -19,9 +19,9 @@ stdenv.mkDerivation rec {
     "-DCAF_ENABLE_EXAMPLES:BOOL=OFF"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-faligned-allocation";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-faligned-allocation";
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   checkTarget = "test";
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/cairo/default.nix b/pkgs/development/libraries/cairo/default.nix
index 28809ade8ae4..4368965d4f18 100644
--- a/pkgs/development/libraries/cairo/default.nix
+++ b/pkgs/development/libraries/cairo/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl, gtk-doc, meson, ninja, pkg-config, python3
 , docbook_xsl, fontconfig, freetype, libpng, pixman, zlib
-, x11Support? !stdenv.isDarwin || true, libXext, libXrender
+, x11Support? !stdenv.hostPlatform.isDarwin || true, libXext, libXrender
 , gobjectSupport ? true, glib
 , xcbSupport ? x11Support, libxcb
 , darwin
@@ -34,7 +34,7 @@ in {
 
   buildInputs = [
     docbook_xsl
-  ] ++ optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreGraphics
     CoreText
     ApplicationServices
@@ -87,7 +87,7 @@ in {
     # `-I' flags to be propagated.
     sed -i "$out/lib/pkgconfig/cairo.pc" \
         -es'|^Cflags:\(.*\)$|Cflags: \1 -I${freetype.dev}/include/freetype2 -I${freetype.dev}/include|g'
-  '' + lib.optionalString stdenv.isDarwin glib.flattenInclude;
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin glib.flattenInclude;
 
   passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
 
diff --git a/pkgs/development/libraries/cairomm/1.16.nix b/pkgs/development/libraries/cairomm/1.16.nix
index 83428f0fef9b..cd561d009187 100644
--- a/pkgs/development/libraries/cairomm/1.16.nix
+++ b/pkgs/development/libraries/cairomm/1.16.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     boost # for tests
     fontconfig
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
   ];
 
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   ];
 
   # Tests fail on Darwin, possibly because of sandboxing.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "C++ bindings for the Cairo vector graphics library";
diff --git a/pkgs/development/libraries/cairomm/default.nix b/pkgs/development/libraries/cairomm/default.nix
index 957cfa26ac73..382770e144f5 100644
--- a/pkgs/development/libraries/cairomm/default.nix
+++ b/pkgs/development/libraries/cairomm/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     boost # for tests
     fontconfig
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     ApplicationServices
   ]);
 
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     "-Dbuild-tests=true"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "C++ bindings for the Cairo vector graphics library";
diff --git a/pkgs/development/libraries/capstone/4.nix b/pkgs/development/libraries/capstone/4.nix
index dd31e9feaf62..836bb47568c3 100644
--- a/pkgs/development/libraries/capstone/4.nix
+++ b/pkgs/development/libraries/capstone/4.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/development/libraries/capstone/default.nix b/pkgs/development/libraries/capstone/default.nix
index b78b007bc597..1aed26cec87d 100644
--- a/pkgs/development/libraries/capstone/default.nix
+++ b/pkgs/development/libraries/capstone/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/development/libraries/catboost/default.nix b/pkgs/development/libraries/catboost/default.nix
index 3824cf046b95..ca0d22ff002c 100644
--- a/pkgs/development/libraries/catboost/default.nix
+++ b/pkgs/development/libraries/catboost/default.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ] ++ lib.optionals cudaSupport (with cudaPackages; [
     cuda_cudart
@@ -81,7 +81,7 @@ stdenv.mkDerivation (finalAttrs: {
     # after bumping the default version of llvm, check for compatibility with the cuda backend and pin it.
     # see https://catboost.ai/en/docs/installation/build-environment-setup-for-cmake#compilers,-linkers-and-related-tools
     CUDAHOSTCXX = lib.optionalString cudaSupport "${llvmPackages_12.stdenv.cc}/bin/cc";
-    NIX_CFLAGS_LINK = lib.optionalString stdenv.isLinux "-fuse-ld=lld";
+    NIX_CFLAGS_LINK = lib.optionalString stdenv.hostPlatform.isLinux "-fuse-ld=lld";
     NIX_LDFLAGS = "-lc -lm";
   };
 
diff --git a/pkgs/development/libraries/catch2/3.nix b/pkgs/development/libraries/catch2/3.nix
index 5985ec519ae4..c7d2296d9629 100644
--- a/pkgs/development/libraries/catch2/3.nix
+++ b/pkgs/development/libraries/catch2/3.nix
@@ -25,13 +25,13 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DCATCH_DEVELOPMENT_BUILD=ON"
     "-DCATCH_BUILD_TESTING=${if doCheck then "ON" else "OFF"}"
-  ] ++ lib.optionals (stdenv.isDarwin && doCheck) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && doCheck) [
     # test has a faulty path normalization technique that won't work in
     # our darwin build environment https://github.com/catchorg/Catch2/issues/1691
     "-DCMAKE_CTEST_ARGUMENTS=-E;ApprovalTests"
   ];
 
-  env = lib.optionalAttrs stdenv.isx86_32 {
+  env = lib.optionalAttrs stdenv.hostPlatform.isx86_32 {
     # Tests fail on x86_32 if compiled with x87 floats: https://github.com/catchorg/Catch2/issues/2796
     NIX_CFLAGS_COMPILE = "-msse2 -mfpmath=sse";
   } // lib.optionalAttrs (stdenv.hostPlatform.isRiscV || stdenv.hostPlatform.isAarch32) {
diff --git a/pkgs/development/libraries/cctag/default.nix b/pkgs/development/libraries/cctag/default.nix
index 238821b6af91..8b37633acfcb 100644
--- a/pkgs/development/libraries/cctag/default.nix
+++ b/pkgs/development/libraries/cctag/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   ];
 
   # Tests are broken on Darwin (linking issue)
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Detection of CCTag markers made up of concentric circles";
diff --git a/pkgs/development/libraries/cctz/default.nix b/pkgs/development/libraries/cctz/default.nix
index c0f8a58a18d9..4ad0bf6b8034 100644
--- a/pkgs/development/libraries/cctz/default.nix
+++ b/pkgs/development/libraries/cctz/default.nix
@@ -13,13 +13,13 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "PREFIX=$(out)" ];
 
-  buildInputs = lib.optional stdenv.isDarwin Foundation;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Foundation;
 
   installTargets = [ "install_hdrs" ]
     ++ lib.optional (!stdenv.hostPlatform.isStatic) "install_shared_lib"
     ++ lib.optional stdenv.hostPlatform.isStatic "install_lib";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libcctz.so $out/lib/libcctz.so
   '';
 
diff --git a/pkgs/development/libraries/cdo/default.nix b/pkgs/development/libraries/cdo/default.nix
index 3de126d111ef..3c63b23d1ce2 100644
--- a/pkgs/development/libraries/cdo/default.nix
+++ b/pkgs/development/libraries/cdo/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   # evaluates to 0 [-Werror,-Wundef-prefix=TARGET_OS_]
   # we don't want to appear to be a catalyst build;
   # we are a TARGET_OS_MAC
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DTARGET_OS_MACCATALYST=0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DTARGET_OS_MACCATALYST=0";
 
   meta = with lib; {
     description = "Collection of command line Operators to manipulate and analyse Climate and NWP model Data";
diff --git a/pkgs/development/libraries/cegui/default.nix b/pkgs/development/libraries/cegui/default.nix
index af52aabca79b..e92ddafc4322 100644
--- a/pkgs/development/libraries/cegui/default.nix
+++ b/pkgs/development/libraries/cegui/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation {
     freetype
     boost
     expat
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     darwin.apple_sdk.frameworks.Foundation
     libiconv
diff --git a/pkgs/development/libraries/check/default.nix b/pkgs/development/libraries/check/default.nix
index 14b4e549264b..10030f5653c2 100644
--- a/pkgs/development/libraries/check/default.nix
+++ b/pkgs/development/libraries/check/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   # Test can randomly fail: https://hydra.nixos.org/build/7243912
   doCheck = false;
 
-  buildInputs = lib.optional stdenv.isDarwin CoreServices;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin CoreServices;
 
   meta = with lib; {
     description = "Unit testing framework for C";
diff --git a/pkgs/development/libraries/chromaprint/default.nix b/pkgs/development/libraries/chromaprint/default.nix
index 934a4b04a96b..e264693ceab8 100644
--- a/pkgs/development/libraries/chromaprint/default.nix
+++ b/pkgs/development/libraries/chromaprint/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ninja ];
 
-  buildInputs = [ ffmpeg_7 ] ++ lib.optionals stdenv.isDarwin
+  buildInputs = [ ffmpeg_7 ] ++ lib.optionals stdenv.hostPlatform.isDarwin
     (with darwin.apple_sdk.frameworks; [ Accelerate CoreGraphics CoreVideo zlib ]);
 
   cmakeFlags = [ "-DBUILD_EXAMPLES=ON" "-DBUILD_TOOLS=ON" ];
diff --git a/pkgs/development/libraries/classads/default.nix b/pkgs/development/libraries/classads/default.nix
index bbe342d98198..0442c7d21209 100644
--- a/pkgs/development/libraries/classads/default.nix
+++ b/pkgs/development/libraries/classads/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   ];
 
   # error: use of undeclared identifier 'finite'; did you mean 'isfinite'?
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-Dfinite=isfinite";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-Dfinite=isfinite";
 
   meta = {
     homepage = "http://www.cs.wisc.edu/condor/classad/";
diff --git a/pkgs/development/libraries/clfft/default.nix b/pkgs/development/libraries/clfft/default.nix
index 824449b0fafc..5843c1b1fcca 100644
--- a/pkgs/development/libraries/clfft/default.nix
+++ b/pkgs/development/libraries/clfft/default.nix
@@ -23,8 +23,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ fftw fftwFloat boost ]
-    ++ lib.optionals stdenv.isLinux [ opencl-clhpp ocl-icd ]
-    ++ lib.optionals stdenv.isDarwin [ OpenCL ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ opencl-clhpp ocl-icd ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ OpenCL ];
 
   # https://github.com/clMathLibraries/clFFT/issues/237
   CXXFLAGS = "-std=c++98";
diff --git a/pkgs/development/libraries/clucene-core/2.x.nix b/pkgs/development/libraries/clucene-core/2.x.nix
index d6049d284513..6fc4ac289677 100644
--- a/pkgs/development/libraries/clucene-core/2.x.nix
+++ b/pkgs/development/libraries/clucene-core/2.x.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
 
     # required for darwin and linux-musl
     ./pthread-include.patch
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ./fix-darwin.patch
 
     # see https://bugs.gentoo.org/869170
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   ];
 
   # see https://github.com/macports/macports-ports/commit/236d43f2450c6be52dc42fd3a2bbabbaa5136201
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/shared/CMakeLists.txt --replace 'fstati64;_fstati64;fstat64;fstat;_fstat' 'fstat;_fstat'
     substituteInPlace src/shared/CMakeLists.txt --replace 'stati64;_stati64;stat64;stat;_stat' 'stat;_stat'
   '';
diff --git a/pkgs/development/libraries/clutter/default.nix b/pkgs/development/libraries/clutter/default.nix
index d6720eb181f4..bb7ddf08957f 100644
--- a/pkgs/development/libraries/clutter/default.nix
+++ b/pkgs/development/libraries/clutter/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     atk
     json-glib
     gobject-introspection
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libX11
     libGL
     libGLU
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--enable-introspection" # needed by muffin AFAIK
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--without-x"
     "--enable-x11-backend=no"
     "--enable-quartz-backend=yes"
diff --git a/pkgs/development/libraries/cmark/default.nix b/pkgs/development/libraries/cmark/default.nix
index a118ecf1adda..83407c64384d 100644
--- a/pkgs/development/libraries/cmark/default.nix
+++ b/pkgs/development/libraries/cmark/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   preCheck = let
-    lib_path = if stdenv.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+    lib_path = if stdenv.hostPlatform.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH" else "LD_LIBRARY_PATH";
   in ''
     export ${lib_path}=$(readlink -f ./src)
   '';
diff --git a/pkgs/development/libraries/cminpack/default.nix b/pkgs/development/libraries/cminpack/default.nix
index 20782c8499cb..81224c0fdaa3 100644
--- a/pkgs/development/libraries/cminpack/default.nix
+++ b/pkgs/development/libraries/cminpack/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = lib.optionals withBlas [
     blas
-  ] ++ lib.optionals (withBlas && stdenv.isDarwin) [
+  ] ++ lib.optionals (withBlas && stdenv.hostPlatform.isDarwin) [
     darwin.apple_sdk.frameworks.Accelerate
     darwin.apple_sdk.frameworks.CoreGraphics
     darwin.apple_sdk.frameworks.CoreVideo
diff --git a/pkgs/development/libraries/cmrt/default.nix b/pkgs/development/libraries/cmrt/default.nix
index 87c692b42cea..2e3fc7a3a198 100644
--- a/pkgs/development/libraries/cmrt/default.nix
+++ b/pkgs/development/libraries/cmrt/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libdrm libva ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://01.org/linuxmedia";
     description = "Intel C for Media Runtime";
     longDescription = "Media GPU kernel manager for Intel G45 & HD Graphics family";
diff --git a/pkgs/development/libraries/cogl/default.nix b/pkgs/development/libraries/cogl/default.nix
index b233113e951f..db34dc1669b1 100644
--- a/pkgs/development/libraries/cogl/default.nix
+++ b/pkgs/development/libraries/cogl/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--enable-introspection"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "--enable-kms-egl-platform"
     "--enable-wayland-egl-platform"
     "--enable-wayland-egl-server"
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     # Force linking against libGL.
     # Otherwise, it tries to load it from the runtime library path.
     "LIBS=-lGL"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--disable-glx"
     "--without-x"
   ] ++ lib.optionals gstreamerSupport [
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
     glib
     gdk-pixbuf
     gobject-introspection
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wayland
     mesa
     libGL
@@ -82,10 +82,10 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = lib.optionals pangoSupport [ pango cairo harfbuzz ]
-    ++ lib.optionals stdenv.isDarwin [ OpenGL ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ OpenGL ];
 
   env = {
-    COGL_PANGO_DEP_CFLAGS = toString (lib.optionals (stdenv.isDarwin && pangoSupport) [
+    COGL_PANGO_DEP_CFLAGS = toString (lib.optionals (stdenv.hostPlatform.isDarwin && pangoSupport) [
       "-I${pango.dev}/include/pango-1.0"
       "-I${cairo.dev}/include/cairo"
       "-I${harfbuzz.dev}/include/harfbuzz"
diff --git a/pkgs/development/libraries/coin3d/default.nix b/pkgs/development/libraries/coin3d/default.nix
index 3261a848e3a6..a0d1ae07d636 100644
--- a/pkgs/development/libraries/coin3d/default.nix
+++ b/pkgs/development/libraries/coin3d/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation (finalAttrs: {
     boost
     libGL
     libGLU
-  ] ++ lib.optional stdenv.isLinux libX11;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux libX11;
 
   cmakeFlags = [ "-DCOIN_USE_CPACK=OFF" ];
 
diff --git a/pkgs/development/libraries/cpp-utilities/default.nix b/pkgs/development/libraries/cpp-utilities/default.nix
index d2fbecf8e61b..1d838b0ba2a2 100644
--- a/pkgs/development/libraries/cpp-utilities/default.nix
+++ b/pkgs/development/libraries/cpp-utilities/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ cmake ];
   nativeCheckInputs = [ cppunit ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv # needed on Darwin, see https://github.com/Martchus/cpp-utilities/issues/4
   ];
 
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
     )
   '';
   # tests fail on Darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://github.com/Martchus/cpp-utilities";
diff --git a/pkgs/development/libraries/cracklib/default.nix b/pkgs/development/libraries/cracklib/default.nix
index 2ccb2988305e..bc69141bb988 100644
--- a/pkgs/development/libraries/cracklib/default.nix
+++ b/pkgs/development/libraries/cracklib/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-cAw5YMplCx6vAhfWmskZuBHyB1o4dGd7hMceOG3V51Y=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     # Fixes build failure on Darwin due to missing byte order functions.
     # https://github.com/cracklib/cracklib/pull/96
     (fetchpatch2 {
diff --git a/pkgs/development/libraries/crc32c/default.nix b/pkgs/development/libraries/crc32c/default.nix
index 3b27601bcbfd..07da71e32670 100644
--- a/pkgs/development/libraries/crc32c/default.nix
+++ b/pkgs/development/libraries/crc32c/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
   buildInputs = [ gflags ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isAarch64 "-march=armv8-a+crc";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isAarch64 "-march=armv8-a+crc";
 
   cmakeFlags = [
     "-DCRC32C_INSTALL=1"
diff --git a/pkgs/development/libraries/crossguid/default.nix b/pkgs/development/libraries/crossguid/default.nix
index c4c015d92481..cd8f95957c4e 100644
--- a/pkgs/development/libraries/crossguid/default.nix
+++ b/pkgs/development/libraries/crossguid/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optional stdenv.isLinux libuuid;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux libuuid;
 
   passthru.updateScript = unstableGitUpdater {
     tagPrefix = "v";
diff --git a/pkgs/development/libraries/ctranslate2/default.nix b/pkgs/development/libraries/ctranslate2/default.nix
index 4668404f9794..b126cff5b24a 100644
--- a/pkgs/development/libraries/ctranslate2/default.nix
+++ b/pkgs/development/libraries/ctranslate2/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     "-DWITH_RUY=${cmakeBool withRuy}"
     "-DWITH_MKL=${cmakeBool withMkl}"
   ]
-  ++ lib.optional stdenv.isDarwin "-DWITH_ACCELERATE=ON";
+  ++ lib.optional stdenv.hostPlatform.isDarwin "-DWITH_ACCELERATE=ON";
 
   buildInputs = lib.optionals withMkl [
     mkl
@@ -67,10 +67,10 @@ stdenv.mkDerivation rec {
     oneDNN
   ] ++ lib.optionals withOpenblas [
     openblas
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.openmp
     darwin.apple_sdk.frameworks.Accelerate
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     darwin.apple_sdk.frameworks.CoreGraphics
     darwin.apple_sdk.frameworks.CoreVideo
   ];
diff --git a/pkgs/development/libraries/cyrus-sasl/default.nix b/pkgs/development/libraries/cyrus-sasl/default.nix
index 0b151bfc719a..60a0d8569a13 100644
--- a/pkgs/development/libraries/cyrus-sasl/default.nix
+++ b/pkgs/development/libraries/cyrus-sasl/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   buildInputs =
     [ openssl db gettext libkrb5 libxcrypt ]
     ++ lib.optional enableLdap openldap
-    ++ lib.optional stdenv.isLinux pam;
+    ++ lib.optional stdenv.hostPlatform.isLinux pam;
 
   configureFlags = [
     "--with-openssl=${openssl.dev}"
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
       "CFLAGS=-DTIME_WITH_SYS_TIME"
     ];
 
-  installFlags = lib.optionals stdenv.isDarwin [ "framedir=$(out)/Library/Frameworks/SASL2.framework" ];
+  installFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "framedir=$(out)/Library/Frameworks/SASL2.framework" ];
 
   passthru.tests = {
     inherit (nixosTests) parsedmarc postfix;
diff --git a/pkgs/development/libraries/db/generic.nix b/pkgs/development/libraries/db/generic.nix
index d715c1ffc8b1..936aed633a44 100644
--- a/pkgs/development/libraries/db/generic.nix
+++ b/pkgs/development/libraries/db/generic.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation (rec {
       (if compat185 then "--enable-compat185" else "--disable-compat185")
     ]
     ++ lib.optional dbmSupport "--enable-dbm"
-    ++ lib.optional stdenv.isFreeBSD "--with-pic";
+    ++ lib.optional stdenv.hostPlatform.isFreeBSD "--with-pic";
 
   preConfigure = ''
     cd build_unix
diff --git a/pkgs/development/libraries/dbus/default.nix b/pkgs/development/libraries/dbus/default.nix
index cb5fe9e4fbd3..017c83c5b11d 100644
--- a/pkgs/development/libraries/dbus/default.nix
+++ b/pkgs/development/libraries/dbus/default.nix
@@ -13,7 +13,7 @@
 , xmlto
 , autoreconfHook
 , autoconf-archive
-, x11Support ? (stdenv.isLinux || stdenv.isDarwin)
+, x11Support ? (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin)
 , xorg
 }:
 
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-uh8h0r2dM52i1KqHgMCd8y/qh5mLc9ok9Jq53x42pQ8=";
   };
 
-  patches = lib.optional stdenv.isSunOS ./implement-getgrouplist.patch;
+  patches = lib.optional stdenv.hostPlatform.isSunOS ./implement-getgrouplist.patch;
 
   postPatch = ''
     substituteInPlace bus/Makefile.am \
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
       libICE
       libSM
     ]) ++ lib.optional enableSystemd systemdMinimal
-    ++ lib.optionals stdenv.isLinux [ audit libapparmor ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ audit libapparmor ];
   # ToDo: optional selinux?
 
   __darwinAllowLocalNetworking = true;
@@ -84,10 +84,10 @@ stdenv.mkDerivation rec {
     "--with-systemdsystemunitdir=${placeholder "out"}/etc/systemd/system"
     "--with-systemduserunitdir=${placeholder "out"}/etc/systemd/user"
   ] ++ lib.optional (!x11Support) "--without-x"
-  ++ lib.optionals stdenv.isLinux [ "--enable-apparmor" "--enable-libaudit" ]
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ "--enable-apparmor" "--enable-libaudit" ]
   ++ lib.optionals enableSystemd [ "SYSTEMCTL=${systemdMinimal}/bin/systemctl" ];
 
-  NIX_CFLAGS_LINK = lib.optionalString (!stdenv.isDarwin) "-Wl,--as-needed";
+  NIX_CFLAGS_LINK = lib.optionalString (!stdenv.hostPlatform.isDarwin) "-Wl,--as-needed";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/dclxvi/default.nix b/pkgs/development/libraries/dclxvi/default.nix
index ac2664a1c9f9..34340a406a50 100644
--- a/pkgs/development/libraries/dclxvi/default.nix
+++ b/pkgs/development/libraries/dclxvi/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
   patchPhase = ''
     substituteInPlace Makefile \
       --replace "gcc" "cc"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace "-soname=libdclxvipairing.so" "-install_name,libdclxvipairing.so"
   '';
diff --git a/pkgs/development/libraries/dconf/default.nix b/pkgs/development/libraries/dconf/default.nix
index 0dddcb5d6482..1aad769c6db2 100644
--- a/pkgs/development/libraries/dconf/default.nix
+++ b/pkgs/development/libraries/dconf/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
     dbus # for dbus-daemon
   ];
 
-  doCheck = !stdenv.isAarch32 && !stdenv.isAarch64 && !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isAarch32 && !stdenv.hostPlatform.isAarch64 && !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     chmod +x meson_post_install.py tests/test-dconf.py
diff --git a/pkgs/development/libraries/discord-rpc/default.nix b/pkgs/development/libraries/discord-rpc/default.nix
index f0c60e9506d5..05837c823c56 100644
--- a/pkgs/development/libraries/discord-rpc/default.nix
+++ b/pkgs/development/libraries/discord-rpc/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     rapidjson
-  ] ++ lib.optional stdenv.isDarwin AppKit;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin AppKit;
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=true"
diff --git a/pkgs/development/libraries/double-conversion/default.nix b/pkgs/development/libraries/double-conversion/default.nix
index 212b854c1e33..857bb48c1154 100644
--- a/pkgs/development/libraries/double-conversion/default.nix
+++ b/pkgs/development/libraries/double-conversion/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = lib.optional (! enableStatic) "-DBUILD_SHARED_LIBS=ON";
 
   # Case sensitivity issue
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     rm BUILD
   '';
 
diff --git a/pkgs/development/libraries/duckdb/default.nix b/pkgs/development/libraries/duckdb/default.nix
index c222b117fff9..ea7b2535f329 100644
--- a/pkgs/development/libraries/duckdb/default.nix
+++ b/pkgs/development/libraries/duckdb/default.nix
@@ -98,12 +98,12 @@ stdenv.mkDerivation (finalAttrs: {
         # wants http connection
         "test/sql/copy/csv/recursive_query_csv.test"
         "test/sql/copy/csv/test_mixed_lines.test"
-      ] ++ lib.optionals stdenv.isAarch64 [
+      ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
         "test/sql/aggregate/aggregates/test_kurtosis.test"
         "test/sql/aggregate/aggregates/test_skewness.test"
         "test/sql/function/list/aggregates/skewness.test"
       ]);
-      LD_LIBRARY_PATH = lib.optionalString stdenv.isDarwin "DY" + "LD_LIBRARY_PATH";
+      LD_LIBRARY_PATH = lib.optionalString stdenv.hostPlatform.isDarwin "DY" + "LD_LIBRARY_PATH";
     in
     ''
       runHook preInstallCheck
diff --git a/pkgs/development/libraries/easyloggingpp/default.nix b/pkgs/development/libraries/easyloggingpp/default.nix
index 0923d2b450bc..a3b891253bf4 100644
--- a/pkgs/development/libraries/easyloggingpp/default.nix
+++ b/pkgs/development/libraries/easyloggingpp/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [gtest];
   cmakeFlags = [ "-Dtest=ON" ];
   env.NIX_CFLAGS_COMPILE = "-std=c++14" +
-    lib.optionalString stdenv.isLinux " -pthread";
+    lib.optionalString stdenv.hostPlatform.isLinux " -pthread";
   postInstall = ''
     mkdir -p $out/include
     cp ../src/easylogging++.cc $out/include
diff --git a/pkgs/development/libraries/edencommon/default.nix b/pkgs/development/libraries/edencommon/default.nix
index fa10344826af..ce26bc6f7125 100644
--- a/pkgs/development/libraries/edencommon/default.nix
+++ b/pkgs/development/libraries/edencommon/default.nix
@@ -20,14 +20,14 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-1z4QicS98juv4bUEbHBkCjVJHEhnoJyLYp4zMHmDbMg=";
   };
 
-  patches = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  patches = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # Test discovery timeout is bizarrely flaky on `x86_64-darwin`
     ./increase-test-discovery-timeout.patch
   ];
 
   nativeBuildInputs = [ cmake ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
diff --git a/pkgs/development/libraries/embree/default.nix b/pkgs/development/libraries/embree/default.nix
index b53be3ae7cf5..f45ea3dc7d3d 100644
--- a/pkgs/development/libraries/embree/default.nix
+++ b/pkgs/development/libraries/embree/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ ispc pkg-config cmake ];
   buildInputs = [ tbb glfw openimageio libjpeg libpng libX11 libpthreadstubs ]
-                ++ lib.optionals stdenv.isDarwin [ glib ];
+                ++ lib.optionals stdenv.hostPlatform.isDarwin [ glib ];
 
   meta = with lib; {
     description = "High performance ray tracing kernels from Intel";
diff --git a/pkgs/development/libraries/enchant/2.x.nix b/pkgs/development/libraries/enchant/2.x.nix
index 69cab2ca5b61..dbd7cefacb67 100644
--- a/pkgs/development/libraries/enchant/2.x.nix
+++ b/pkgs/development/libraries/enchant/2.x.nix
@@ -14,12 +14,12 @@
 , withAspell ? true
 , withHunspell ? true
 , withNuspell ? true
-, withAppleSpell ? stdenv.isDarwin
+, withAppleSpell ? stdenv.hostPlatform.isDarwin
 
 , Cocoa
 }:
 
-assert withAppleSpell -> stdenv.isDarwin;
+assert withAppleSpell -> stdenv.hostPlatform.isDarwin;
 
 stdenv.mkDerivation rec {
   pname = "enchant";
diff --git a/pkgs/development/libraries/exempi/default.nix b/pkgs/development/libraries/exempi/default.nix
index 96d8d1db7a9a..ccdd0048e2aa 100644
--- a/pkgs/development/libraries/exempi/default.nix
+++ b/pkgs/development/libraries/exempi/default.nix
@@ -16,9 +16,9 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ expat zlib boost ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv darwin.apple_sdk.frameworks.CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv darwin.apple_sdk.frameworks.CoreServices ];
 
-  doCheck = stdenv.isLinux && stdenv.is64bit;
+  doCheck = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.is64bit;
   dontDisableStatic = doCheck;
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/libraries/exiv2/default.nix b/pkgs/development/libraries/exiv2/default.nix
index 1591b8021501..56edbdab5d53 100644
--- a/pkgs/development/libraries/exiv2/default.nix
+++ b/pkgs/development/libraries/exiv2/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     removeReferencesTo
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
     # Fix tests on arm
     # https://github.com/Exiv2/exiv2/issues/933
     rm -f ../tests/bugfixes/github/test_CVE_2018_12265.py
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH''${DYLD_LIBRARY_PATH:+:}$PWD/lib
     export LC_ALL=C
 
diff --git a/pkgs/development/libraries/expat/default.nix b/pkgs/development/libraries/expat/default.nix
index bb97ca8728e0..50ae45f38e9a 100644
--- a/pkgs/development/libraries/expat/default.nix
+++ b/pkgs/development/libraries/expat/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  configureFlags = lib.optional stdenv.isFreeBSD "--with-pic";
+  configureFlags = lib.optional stdenv.hostPlatform.isFreeBSD "--with-pic";
 
   outputMan = "dev"; # tiny page for a dev tool
 
diff --git a/pkgs/development/libraries/fb303/default.nix b/pkgs/development/libraries/fb303/default.nix
index 059e666027a0..659497d690f6 100644
--- a/pkgs/development/libraries/fb303/default.nix
+++ b/pkgs/development/libraries/fb303/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
   cmakeFlags = [
     "-DPYTHON_EXTENSIONS=OFF"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
diff --git a/pkgs/development/libraries/fbthrift/default.nix b/pkgs/development/libraries/fbthrift/default.nix
index 5ac08f2c6cc3..04bce085c088 100644
--- a/pkgs/development/libraries/fbthrift/default.nix
+++ b/pkgs/development/libraries/fbthrift/default.nix
@@ -39,8 +39,8 @@ stdenv.mkDerivation rec {
   ];
 
   cmakeFlags = [
-    "-DBUILD_SHARED_LIBS=${if stdenv.isDarwin then "OFF" else "ON"}"
-  ] ++ lib.optionals stdenv.isDarwin [
+    "-DBUILD_SHARED_LIBS=${if stdenv.hostPlatform.isDarwin then "OFF" else "ON"}"
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
diff --git a/pkgs/development/libraries/fflas-ffpack/default.nix b/pkgs/development/libraries/fflas-ffpack/default.nix
index 65c29f9319ce..1d8c87ba45d1 100644
--- a/pkgs/development/libraries/fflas-ffpack/default.nix
+++ b/pkgs/development/libraries/fflas-ffpack/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     "--with-blas-libs=-lcblas"
     "--with-lapack-libs=-llapacke"
     "--without-archnative"
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     # disable SIMD instructions (which are enabled *when available* by default)
     # for now we need to be careful to disable *all* relevant versions of an instruction set explicitly (https://github.com/linbox-team/fflas-ffpack/issues/284)
     "--${if stdenv.hostPlatform.sse3Support   then "enable" else "disable"}-sse3"
diff --git a/pkgs/development/libraries/ffmpeg/generic.nix b/pkgs/development/libraries/ffmpeg/generic.nix
index 4e8226c1904a..dc471944654a 100644
--- a/pkgs/development/libraries/ffmpeg/generic.nix
+++ b/pkgs/development/libraries/ffmpeg/generic.nix
@@ -33,14 +33,14 @@
 , fetchpatch2
 
   # Feature flags
-, withAlsa ? withHeadlessDeps && stdenv.isLinux # Alsa in/output supporT
+, withAlsa ? withHeadlessDeps && stdenv.hostPlatform.isLinux # Alsa in/output supporT
 , withAmf ? lib.meta.availableOn stdenv.hostPlatform amf # AMD Media Framework video encoding
 , withAom ? withHeadlessDeps # AV1 reference encoder
-, withAppKit ? withHeadlessDeps && stdenv.isDarwin # Apple AppKit framework
+, withAppKit ? withHeadlessDeps && stdenv.hostPlatform.isDarwin # Apple AppKit framework
 , withAribcaption ? withFullDeps && lib.versionAtLeast version "6.1" # ARIB STD-B24 Caption Decoder/Renderer
 , withAss ? withHeadlessDeps && stdenv.hostPlatform == stdenv.buildPlatform # (Advanced) SubStation Alpha subtitle rendering
-, withAudioToolbox ? withHeadlessDeps && stdenv.isDarwin # Apple AudioToolbox
-, withAvFoundation ? withHeadlessDeps && stdenv.isDarwin # Apple AVFoundation framework
+, withAudioToolbox ? withHeadlessDeps && stdenv.hostPlatform.isDarwin # Apple AudioToolbox
+, withAvFoundation ? withHeadlessDeps && stdenv.hostPlatform.isDarwin # Apple AVFoundation framework
 , withAvisynth ? withFullDeps # AviSynth script files reading
 , withBluray ? withFullDeps # BluRay reading
 , withBs2b ? withFullDeps # bs2b DSP library
@@ -49,12 +49,12 @@
 , withCelt ? withHeadlessDeps # CELT decoder
 , withChromaprint ? withFullDeps # Audio fingerprinting
 , withCodec2 ? withFullDeps # codec2 en/decoding
-, withCoreImage ? withHeadlessDeps && stdenv.isDarwin # Apple CoreImage framework
+, withCoreImage ? withHeadlessDeps && stdenv.hostPlatform.isDarwin # Apple CoreImage framework
 , withCuda ? withFullDeps && withNvcodec
 , withCudaLLVM ? withFullDeps
 , withCuvid ? withHeadlessDeps && withNvcodec
 , withDav1d ? withHeadlessDeps # AV1 decoder (focused on speed and correctness)
-, withDc1394 ? withFullDeps && !stdenv.isDarwin # IIDC-1394 grabbing (ieee 1394)
+, withDc1394 ? withFullDeps && !stdenv.hostPlatform.isDarwin # IIDC-1394 grabbing (ieee 1394)
 , withDrm ? withHeadlessDeps && (with stdenv; isLinux || isFreeBSD) # libdrm support
 , withDvdnav ? withFullDeps && withGPL && lib.versionAtLeast version "7" # needed for DVD demuxing
 , withDvdread ? withFullDeps && withGPL && lib.versionAtLeast version "7" # needed for DVD demuxing
@@ -71,14 +71,14 @@
 , withHarfbuzz ? withHeadlessDeps && lib.versionAtLeast version "6.1" # Needed for drawtext filter
 , withIconv ? withHeadlessDeps
 , withIlbc ? withFullDeps # iLBC de/encoding
-, withJack ? withFullDeps && !stdenv.isDarwin # Jack audio
+, withJack ? withFullDeps && !stdenv.hostPlatform.isDarwin # Jack audio
 , withJxl ? withFullDeps && lib.versionAtLeast version "5" # JPEG XL de/encoding
 , withLadspa ? withFullDeps # LADSPA audio filtering
 , withLcms2 ? withFullDeps # ICC profile support via lcms2
 , withLzma ? withHeadlessDeps # xz-utils
 , withMetal ? false # Unfree and requires manual downloading of files
 , withMfx ? withFullDeps && (with stdenv.hostPlatform; isLinux && !isAarch) # Hardware acceleration via intel-media-sdk/libmfx
-, withModplug ? withFullDeps && !stdenv.isDarwin # ModPlug support
+, withModplug ? withFullDeps && !stdenv.hostPlatform.isDarwin # ModPlug support
 , withMp3lame ? withHeadlessDeps # LAME MP3 encoder
 , withMysofa ? withFullDeps # HRTF support via SOFAlizer
 , withNvdec ? withHeadlessDeps && withNvcodec
@@ -88,21 +88,21 @@
 , withOpencl ? withFullDeps
 , withOpencoreAmrnb ? withFullDeps && withVersion3 # AMR-NB de/encoder
 , withOpencoreAmrwb ? withFullDeps && withVersion3 # AMR-WB decoder
-, withOpengl ? withFullDeps && !stdenv.isDarwin # OpenGL rendering
+, withOpengl ? withFullDeps && !stdenv.hostPlatform.isDarwin # OpenGL rendering
 , withOpenh264 ? withFullDeps # H.264/AVC encoder
 , withOpenjpeg ? withHeadlessDeps # JPEG 2000 de/encoder
 , withOpenmpt ? withFullDeps # Tracked music files decoder
 , withOpus ? withHeadlessDeps # Opus de/encoder
-, withPlacebo ? withFullDeps && !stdenv.isDarwin # libplacebo video processing library
-, withPulse ? withSmallDeps && stdenv.isLinux # Pulseaudio input support
+, withPlacebo ? withFullDeps && !stdenv.hostPlatform.isDarwin # libplacebo video processing library
+, withPulse ? withSmallDeps && stdenv.hostPlatform.isLinux # Pulseaudio input support
 , withQrencode ? withFullDeps && lib.versionAtLeast version "7" # QR encode generation
 , withQuirc ? withFullDeps && lib.versionAtLeast version "7" # QR decoding
 , withRav1e ? withFullDeps # AV1 encoder (focused on speed and safety)
 , withRtmp ? withFullDeps # RTMP[E] support
 , withRubberband ? withFullDeps && withGPL # Rubberband filter
-, withSamba ? withFullDeps && !stdenv.isDarwin && withGPLv3 # Samba protocol
+, withSamba ? withFullDeps && !stdenv.hostPlatform.isDarwin && withGPLv3 # Samba protocol
 , withSdl2 ? withSmallDeps
-, withShaderc ? withFullDeps && !stdenv.isDarwin && lib.versionAtLeast version "5.0"
+, withShaderc ? withFullDeps && !stdenv.hostPlatform.isDarwin && lib.versionAtLeast version "5.0"
 , withShine ? withFullDeps # Fixed-point MP3 encoding
 , withSnappy ? withFullDeps # Snappy compression, needed for hap encoding
 , withSoxr ? withHeadlessDeps # Resampling via soxr
@@ -110,22 +110,22 @@
 , withSrt ? withHeadlessDeps # Secure Reliable Transport (SRT) protocol
 , withSsh ? withHeadlessDeps # SFTP protocol
 , withSvg ? withFullDeps # SVG protocol
-, withSvtav1 ? withHeadlessDeps && !stdenv.isAarch64 && !stdenv.hostPlatform.isMinGW # AV1 encoder/decoder (focused on speed and correctness)
+, withSvtav1 ? withHeadlessDeps && !stdenv.hostPlatform.isAarch64 && !stdenv.hostPlatform.isMinGW # AV1 encoder/decoder (focused on speed and correctness)
 , withTensorflow ? false # Tensorflow dnn backend support (Increases closure size by ~390 MiB)
 , withTheora ? withHeadlessDeps # Theora encoder
 , withTwolame ? withFullDeps # MP2 encoding
-, withV4l2 ? withHeadlessDeps && stdenv.isLinux  # Video 4 Linux support
+, withV4l2 ? withHeadlessDeps && stdenv.hostPlatform.isLinux  # Video 4 Linux support
 , withV4l2M2m ? withV4l2
 , withVaapi ? withHeadlessDeps && (with stdenv; isLinux || isFreeBSD) # Vaapi hardware acceleration
 , withVdpau ? withSmallDeps && !stdenv.hostPlatform.isMinGW # Vdpau hardware acceleration
-, withVideoToolbox ? withHeadlessDeps && stdenv.isDarwin # Apple VideoToolbox
+, withVideoToolbox ? withHeadlessDeps && stdenv.hostPlatform.isDarwin # Apple VideoToolbox
 , withVidStab ? withFullDeps && withGPL # Video stabilization
-, withVmaf ? withFullDeps && !stdenv.isAarch64 && lib.versionAtLeast version "5" # Netflix's VMAF (Video Multi-Method Assessment Fusion)
+, withVmaf ? withFullDeps && !stdenv.hostPlatform.isAarch64 && lib.versionAtLeast version "5" # Netflix's VMAF (Video Multi-Method Assessment Fusion)
 , withVoAmrwbenc ? withFullDeps && withVersion3 # AMR-WB encoder
 , withVorbis ? withHeadlessDeps # Vorbis de/encoding, native encoder exists
 , withVpl ? false # Hardware acceleration via intel libvpl
 , withVpx ? withHeadlessDeps && stdenv.buildPlatform == stdenv.hostPlatform # VP8 & VP9 de/encoding
-, withVulkan ? withSmallDeps && !stdenv.isDarwin
+, withVulkan ? withSmallDeps && !stdenv.hostPlatform.isDarwin
 , withWebp ? withHeadlessDeps # WebP encoder
 , withX264 ? withHeadlessDeps && withGPL # H.264/AVC encoder
 , withX265 ? withHeadlessDeps && withGPL # H.265/HEVC encoder
@@ -827,7 +827,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # Fails with SIGABRT otherwise FIXME: Why?
   checkPhase = let
-    ldLibraryPathEnv = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+    ldLibraryPathEnv = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     libsToLink = [ ]
       ++ optional buildAvcodec "libavcodec"
       ++ optional buildAvdevice "libavdevice"
@@ -856,7 +856,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # Set RUNPATH so that libnvcuvid and libcuda in /run/opengl-driver(-32)/lib can be found.
   # See the explanation in addDriverRunpath.
-  postFixup = optionalString (stdenv.isLinux && withLib) ''
+  postFixup = optionalString (stdenv.hostPlatform.isLinux && withLib) ''
     addDriverRunpath ${placeholder "lib"}/lib/libavcodec.so
     addDriverRunpath ${placeholder "lib"}/lib/libavutil.so
   ''
diff --git a/pkgs/development/libraries/fftw/default.nix b/pkgs/development/libraries/fftw/default.nix
index 7c06a346e4bb..b6107f3ef91a 100644
--- a/pkgs/development/libraries/fftw/default.nix
+++ b/pkgs/development/libraries/fftw/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optional (precision != "double") "--enable-${precision}"
   # https://www.fftw.org/fftw3_doc/SIMD-alignment-and-fftw_005fmalloc.html
   # FFTW will try to detect at runtime whether the CPU supports these extensions
-  ++ lib.optional (stdenv.isx86_64 && (precision == "single" || precision == "double"))
+  ++ lib.optional (stdenv.hostPlatform.isx86_64 && (precision == "single" || precision == "double"))
     "--enable-sse2 --enable-avx --enable-avx2 --enable-avx512 --enable-avx128-fma"
   ++ lib.optional enableMpi "--enable-mpi"
   # doc generation causes Fortran wrapper generation which hard-codes gcc
diff --git a/pkgs/development/libraries/fizz/default.nix b/pkgs/development/libraries/fizz/default.nix
index cc7a249cf76f..4c38c54316b7 100644
--- a/pkgs/development/libraries/fizz/default.nix
+++ b/pkgs/development/libraries/fizz/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     "-Wno-dev"
     (lib.cmakeBool "BUILD_TESTS" finalAttrs.finalPackage.doCheck)
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
diff --git a/pkgs/development/libraries/folks/default.nix b/pkgs/development/libraries/folks/default.nix
index edbebdb1b8da..777bef924662 100644
--- a/pkgs/development/libraries/folks/default.nix
+++ b/pkgs/development/libraries/folks/default.nix
@@ -78,7 +78,7 @@ stdenv.mkDerivation (finalAttrs: {
   mesonFlags = [
     "-Ddocs=true"
     "-Dtelepathy_backend=${lib.boolToString telepathySupport}"
-    "-Dtests=${lib.boolToString (finalAttrs.finalPackage.doCheck && stdenv.isLinux)}"
+    "-Dtests=${lib.boolToString (finalAttrs.finalPackage.doCheck && stdenv.hostPlatform.isLinux)}"
   ];
 
   # backends/eds/lib/libfolks-eds.so.26.0.0.p/edsf-persona-store.c:10697:4:
diff --git a/pkgs/development/libraries/folly/default.nix b/pkgs/development/libraries/folly/default.nix
index 532fc4847715..8a601382f8ea 100644
--- a/pkgs/development/libraries/folly/default.nix
+++ b/pkgs/development/libraries/folly/default.nix
@@ -55,10 +55,10 @@ stdenv.mkDerivation rec {
     libunwind
     fmt_8
     zstd
-  ] ++ lib.optional stdenv.isLinux jemalloc;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux jemalloc;
 
   # jemalloc headers are required in include/folly/portability/Malloc.h
-  propagatedBuildInputs = lib.optional stdenv.isLinux jemalloc;
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isLinux jemalloc;
 
   env.NIX_CFLAGS_COMPILE = toString [ "-DFOLLY_MOBILE=${if follyMobile then "1" else "0"}" "-fpermissive" ];
   cmakeFlags = [
@@ -66,13 +66,13 @@ stdenv.mkDerivation rec {
 
     # temporary hack until folly builds work on aarch64,
     # see https://github.com/facebook/folly/issues/1880
-    "-DCMAKE_LIBRARY_ARCHITECTURE=${if stdenv.isx86_64 then "x86_64" else "dummy"}"
+    "-DCMAKE_LIBRARY_ARCHITECTURE=${if stdenv.hostPlatform.isx86_64 then "x86_64" else "dummy"}"
 
     # ensure correct dirs in $dev/lib/pkgconfig/libfolly.pc
     # see https://github.com/NixOS/nixpkgs/issues/144170
     "-DCMAKE_INSTALL_INCLUDEDIR=include"
     "-DCMAKE_INSTALL_LIBDIR=lib"
-  ] ++ lib.optional (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.13"
   ];
 
diff --git a/pkgs/development/libraries/fontconfig/default.nix b/pkgs/development/libraries/fontconfig/default.nix
index 83c5e3afc271..4f7f3c0fe1e9 100644
--- a/pkgs/development/libraries/fontconfig/default.nix
+++ b/pkgs/development/libraries/fontconfig/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [
     expat
-  ] ++ lib.optional stdenv.isDarwin CoreFoundation;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin CoreFoundation;
 
   propagatedBuildInputs = [
     freetype
diff --git a/pkgs/development/libraries/fontconfig/make-fonts-conf.nix b/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
index ff0d95ba4451..669b66267f87 100644
--- a/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
+++ b/pkgs/development/libraries/fontconfig/make-fonts-conf.nix
@@ -9,13 +9,13 @@ let fontconfig_ = fontconfig; in
     # nix user profile
     "~/.nix-profile/lib/X11/fonts" "~/.nix-profile/share/fonts"
   ]
-  ++ lib.optional stdenv.isDarwin "~/Library/Fonts"
+  ++ lib.optional stdenv.hostPlatform.isDarwin "~/Library/Fonts"
   ++ [
     # FHS paths for non-NixOS platforms
     "/usr/share/fonts" "/usr/local/share/fonts"
   ]
   # darwin paths
-  ++ lib.optionals stdenv.isDarwin [ "/Library/Fonts" "/System/Library/Fonts" ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ "/Library/Fonts" "/System/Library/Fonts" ]
   # nix default profile
   ++ [ "/nix/var/nix/profiles/default/lib/X11/fonts" "/nix/var/nix/profiles/default/share/fonts" ]
 
diff --git a/pkgs/development/libraries/fox/fox-1.6.nix b/pkgs/development/libraries/fox/fox-1.6.nix
index 4ceb6261231e..e10d01d2c842 100644
--- a/pkgs/development/libraries/fox/fox-1.6.nix
+++ b/pkgs/development/libraries/fox/fox-1.6.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libpng libjpeg libtiff zlib bzip2 libXcursor libXrandr
     libXext libXft libGLU libGL libXfixes xinput
-  ] ++ lib.optional stdenv.isDarwin CoreServices;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin CoreServices;
 
   doCheck = true;
 
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     branch = "1.6";
     description = "C++ based class library for building Graphical User Interfaces";
     longDescription = ''
diff --git a/pkgs/development/libraries/freealut/default.nix b/pkgs/development/libraries/freealut/default.nix
index dbae2b20b61c..2f98b1c8e7a2 100644
--- a/pkgs/development/libraries/freealut/default.nix
+++ b/pkgs/development/libraries/freealut/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   buildInputs = [ openal
-  ] ++ lib.optional stdenv.isDarwin
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin
     darwin.apple_sdk.frameworks.OpenAL
   ;
 
diff --git a/pkgs/development/libraries/freeglut/default.nix b/pkgs/development/libraries/freeglut/default.nix
index c3a0fdb797f6..590167fc7036 100644
--- a/pkgs/development/libraries/freeglut/default.nix
+++ b/pkgs/development/libraries/freeglut/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ cmake ];
   buildInputs = [ libICE libXext libXi libXrandr libXxf86vm libGLU ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
                  "-DOPENGL_INCLUDE_DIR=${libGLX.dev}/include"
                  "-DOPENGL_gl_LIBRARY:FILEPATH=${libGLX}/lib/libGL.dylib"
                  "-DOPENGL_glu_LIBRARY:FILEPATH=${libGLU}/lib/libGLU.dylib"
diff --git a/pkgs/development/libraries/freeimage/default.nix b/pkgs/development/libraries/freeimage/default.nix
index 20ced14ace6e..dd63935b23fd 100644
--- a/pkgs/development/libraries/freeimage/default.nix
+++ b/pkgs/development/libraries/freeimage/default.nix
@@ -30,22 +30,22 @@ stdenv.mkDerivation (finalAttrs: {
       --replace "pkg-config" "$PKG_CONFIG"
     substituteInPlace Makefile.gnu \
       --replace "pkg-config" "$PKG_CONFIG"
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     # Upstream Makefile hardcodes i386 and x86_64 architectures only
     substituteInPlace Makefile.osx --replace "x86_64" "arm64"
   '';
 
   nativeBuildInputs = [
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
     fixDarwinDylibNames
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     autoSignDarwinBinariesHook
   ];
   buildInputs = [ libtiff libtiff.dev_private libpng zlib libwebp libraw openexr openjpeg libjpeg libjpeg.dev_private jxrlib ];
 
-  postBuild = lib.optionalString (!stdenv.isDarwin) ''
+  postBuild = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     make -f Makefile.fip
   '';
 
@@ -56,13 +56,13 @@ stdenv.mkDerivation (finalAttrs: {
     mkdir -p $INCDIR $INSTALLDIR
   ''
   # Workaround for Makefiles.osx not using ?=
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     makeFlagsArray+=( "INCDIR=$INCDIR" "INSTALLDIR=$INSTALLDIR" )
   '';
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     make -f Makefile.fip install
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/lib/libfreeimage.3.dylib $out/lib/libfreeimage.dylib
   '';
 
diff --git a/pkgs/development/libraries/freenect/default.nix b/pkgs/development/libraries/freenect/default.nix
index 4be38fbef062..f58785c1e1bd 100644
--- a/pkgs/development/libraries/freenect/default.nix
+++ b/pkgs/development/libraries/freenect/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ libusb1 libglut libGLU libGL libXi libXmu ]
-    ++ lib.optionals stdenv.isDarwin [ GLUT Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ GLUT Cocoa ];
 
   nativeBuildInputs = [ cmake pkg-config ];
 
diff --git a/pkgs/development/libraries/freetype/default.nix b/pkgs/development/libraries/freetype/default.nix
index 8ff0005d0ff0..34e156256afd 100644
--- a/pkgs/development/libraries/freetype/default.nix
+++ b/pkgs/development/libraries/freetype/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ pkg-config which ]
     ++ lib.optional (!stdenv.hostPlatform.isWindows) makeWrapper
     # FreeType requires GNU Make, which is not part of stdenv on FreeBSD.
-    ++ lib.optional (!stdenv.isLinux) gnumake;
+    ++ lib.optional (!stdenv.hostPlatform.isLinux) gnumake;
 
   patches = [
     ./enable-table-validation.patch
@@ -65,7 +65,7 @@ stdenv.mkDerivation (finalAttrs: {
   CC_BUILD = "${buildPackages.stdenv.cc}/bin/cc";
 
   # The asm for armel is written with the 'asm' keyword.
-  CFLAGS = lib.optionalString stdenv.isAarch32 "-std=gnu99"
+  CFLAGS = lib.optionalString stdenv.hostPlatform.isAarch32 "-std=gnu99"
     + lib.optionalString stdenv.hostPlatform.is32bit " -D_FILE_OFFSET_BITS=64";
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/libraries/freexl/default.nix b/pkgs/development/libraries/freexl/default.nix
index 74d4a646b074..ffcf81e92f58 100644
--- a/pkgs/development/libraries/freexl/default.nix
+++ b/pkgs/development/libraries/freexl/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     expat
     minizip
     zlib
-  ] ++ lib.optional stdenv.isDarwin libiconv;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/fribidi/default.nix b/pkgs/development/libraries/fribidi/default.nix
index f5d6bcc7df34..691b826e3af5 100644
--- a/pkgs/development/libraries/fribidi/default.nix
+++ b/pkgs/development/libraries/fribidi/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   nativeBuildInputs = [ meson ninja pkg-config ]
-    ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+    ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
diff --git a/pkgs/development/libraries/g2o/default.nix b/pkgs/development/libraries/g2o/default.nix
index 7ff0c207060c..6f6560ea9f3f 100644
--- a/pkgs/development/libraries/g2o/default.nix
+++ b/pkgs/development/libraries/g2o/default.nix
@@ -28,7 +28,7 @@ mkDerivation rec {
     # Detection script is broken
     "-DQGLVIEWER_INCLUDE_DIR=${libqglviewer}/include/QGLViewer"
     "-DG2O_BUILD_EXAMPLES=OFF"
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     "-DDO_SSE_AUTODETECT=OFF"
     "-DDISABLE_SSE3=${  if stdenv.hostPlatform.sse3Support   then "OFF" else "ON"}"
     "-DDISABLE_SSE4_1=${if stdenv.hostPlatform.sse4_1Support then "OFF" else "ON"}"
@@ -43,6 +43,6 @@ mkDerivation rec {
     maintainers = with maintainers; [ lopsided98 ];
     platforms = platforms.all;
     # fatal error: 'qglviewer.h' file not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/galario/default.nix b/pkgs/development/libraries/galario/default.nix
index 8b54cfb7b879..add2445f4462 100644
--- a/pkgs/development/libraries/galario/default.nix
+++ b/pkgs/development/libraries/galario/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ fftw fftwFloat ]
   ++ lib.optional enablePython pythonPackages.python
-  ++ lib.optional stdenv.isDarwin llvmPackages.openmp
+  ++ lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp
   ;
 
   propagatedBuildInputs = lib.optionals enablePython [
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
   '';
 
   preCheck = ''
-    ${if stdenv.isDarwin then "export DYLD_LIBRARY_PATH=$(pwd)/src/" else "export LD_LIBRARY_PATH=$(pwd)/src/"}
+    ${if stdenv.hostPlatform.isDarwin then "export DYLD_LIBRARY_PATH=$(pwd)/src/" else "export LD_LIBRARY_PATH=$(pwd)/src/"}
     ${lib.optionalString enablePython "sed -i -e 's|^#!.*|#!${stdenv.shell}|' python/py.test.sh"}
   '';
 
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  postInstall = lib.optionalString (stdenv.isDarwin && enablePython) ''
+  postInstall = lib.optionalString (stdenv.hostPlatform.isDarwin && enablePython) ''
     install_name_tool -change libgalario.dylib $out/lib/libgalario.dylib $out/lib/python*/site-packages/galario/double/libcommon.so
     install_name_tool -change libgalario_single.dylib $out/lib/libgalario_single.dylib $out/lib/python*/site-packages/galario/single/libcommon.so
   '';
diff --git a/pkgs/development/libraries/garmintools/default.nix b/pkgs/development/libraries/garmintools/default.nix
index e183a24c8128..2c5740692f4b 100644
--- a/pkgs/development/libraries/garmintools/default.nix
+++ b/pkgs/development/libraries/garmintools/default.nix
@@ -14,6 +14,6 @@ stdenv.mkDerivation rec {
     maintainers = [ ];
     platforms = lib.platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/libraries/gbenchmark/default.nix b/pkgs/development/libraries/gbenchmark/default.nix
index bf60ec5e4297..be39b0d7cbdd 100644
--- a/pkgs/development/libraries/gbenchmark/default.nix
+++ b/pkgs/development/libraries/gbenchmark/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   # Tests fail on 32-bit due to not enough precision
-  doCheck = stdenv.is64bit;
+  doCheck = stdenv.hostPlatform.is64bit;
 
   passthru.tests = {
     inherit prometheus-cpp;
diff --git a/pkgs/development/libraries/gcc/libstdc++/5.nix b/pkgs/development/libraries/gcc/libstdc++/5.nix
index 48a034aebceb..455c84e5dc18 100644
--- a/pkgs/development/libraries/gcc/libstdc++/5.nix
+++ b/pkgs/development/libraries/gcc/libstdc++/5.nix
@@ -114,6 +114,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.linux;
     maintainers = with maintainers; [ abbradar ];
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/libraries/gd/default.nix b/pkgs/development/libraries/gd/default.nix
index 0a74d6122ee2..6b1a471d4aac 100644
--- a/pkgs/development/libraries/gd/default.nix
+++ b/pkgs/development/libraries/gd/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     "--enable-gd-formats"
   ]
     # -pthread gets passed to clang, causing warnings
-    ++ lib.optional stdenv.isDarwin "--enable-werror=no";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--enable-werror=no";
 
   nativeBuildInputs = [ autoconf automake pkg-config ];
 
diff --git a/pkgs/development/libraries/gdal/default.nix b/pkgs/development/libraries/gdal/default.nix
index cf2ff67acf41..18f82b99afa0 100644
--- a/pkgs/development/libraries/gdal/default.nix
+++ b/pkgs/development/libraries/gdal/default.nix
@@ -4,7 +4,7 @@
 , fetchFromGitHub
 
 , useMinimalFeatures ? false
-, useTiledb ? (!useMinimalFeatures) && !(stdenv.isDarwin && stdenv.isx86_64)
+, useTiledb ? (!useMinimalFeatures) && !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64)
 , useLibHEIF ? (!useMinimalFeatures)
 , useLibJXL ? (!useMinimalFeatures)
 , useMysql ? (!useMinimalFeatures)
@@ -107,9 +107,9 @@ stdenv.mkDerivation (finalAttrs: {
     "-DMYSQL_LIBRARY=${lib.getLib libmysqlclient}/lib/${lib.optionalString (libmysqlclient.pname != "mysql") "mysql/"}libmysqlclient${stdenv.hostPlatform.extensions.sharedLibrary}"
   ] ++ lib.optionals finalAttrs.doInstallCheck [
     "-DBUILD_TESTING=ON"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "-DCMAKE_SKIP_BUILD_RPATH=ON" # without, libgdal.so can't find libmariadb.so
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_BUILD_WITH_INSTALL_NAME_DIR=ON"
   ] ++ lib.optionals (!useTiledb) [
     "-DGDAL_USE_TILEDB=OFF"
@@ -145,8 +145,8 @@ stdenv.mkDerivation (finalAttrs: {
       netCdfDeps = lib.optionals useNetCDF [ netcdf ];
       armadilloDeps = lib.optionals useArmadillo [ armadillo ];
 
-      darwinDeps = lib.optionals stdenv.isDarwin [ libiconv ];
-      nonDarwinDeps = lib.optionals (!stdenv.isDarwin) ([
+      darwinDeps = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
+      nonDarwinDeps = lib.optionals (!stdenv.hostPlatform.isDarwin) ([
         # tests for formats enabled by these packages fail on macos
         openexr
         xercesc
@@ -256,10 +256,10 @@ stdenv.mkDerivation (finalAttrs: {
     # failing with PROJ 9.3.1
     # https://github.com/OSGeo/gdal/issues/8908
     "test_osr_esri_28"
-  ] ++ lib.optionals (!stdenv.isx86_64) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isx86_64) [
     # likely precision-related expecting x87 behaviour
     "test_jp2openjpeg_22"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # flaky on macos
     "test_rda_download_queue"
   ] ++ lib.optionals (lib.versionOlder proj.version "8") [
diff --git a/pkgs/development/libraries/gdcm/default.nix b/pkgs/development/libraries/gdcm/default.nix
index 33afe0ea7c54..50ad7bdd9fd6 100644
--- a/pkgs/development/libraries/gdcm/default.nix
+++ b/pkgs/development/libraries/gdcm/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optional stdenv.isDarwin DarwinTools;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin DarwinTools;
 
   buildInputs = [
     expat
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     zlib
   ] ++ lib.optionals enableVTK [
     vtk
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     Cocoa
     libiconv
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
     "TestSCUValidation"
     # errors because 3 classes not wrapped:
     "TestWrapPython"
-  ] ++ lib.optionals (stdenv.isAarch64 && stdenv.isLinux) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
     "TestRescaler2"
   ];
 
diff --git a/pkgs/development/libraries/gdk-pixbuf/default.nix b/pkgs/development/libraries/gdk-pixbuf/default.nix
index 59760504f98e..b7ba12245362 100644
--- a/pkgs/development/libraries/gdk-pixbuf/default.nix
+++ b/pkgs/development/libraries/gdk-pixbuf/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation (finalAttrs: {
 
     # for man pages
     docutils
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ] ++ lib.optionals withIntrospection [
     gi-docgen
@@ -105,7 +105,7 @@ stdenv.mkDerivation (finalAttrs: {
       moveToOutput "bin" "$dev"
       moveToOutput "bin/gdk-pixbuf-thumbnailer" "$out"
 
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # meson erroneously installs loaders with .dylib extension on Darwin.
       # Their @rpath has to be replaced before gdk-pixbuf-query-loaders looks at them.
       for f in $out/${finalAttrs.passthru.moduleDir}/*.dylib; do
@@ -118,7 +118,7 @@ stdenv.mkDerivation (finalAttrs: {
     '';
 
   # The fixDarwinDylibNames hook doesn't patch binaries.
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in $out/bin/* $dev/bin/*; do
         install_name_tool -change @rpath/libgdk_pixbuf-2.0.0.dylib $out/lib/libgdk_pixbuf-2.0.0.dylib $f
     done
@@ -134,7 +134,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   setupHook = ./setup-hook.sh;
 
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   passthru = {
     updateScript = gnome.updateScript {
diff --git a/pkgs/development/libraries/gegl/default.nix b/pkgs/development/libraries/gegl/default.nix
index addc4a9dbe44..95cdef473467 100644
--- a/pkgs/development/libraries/gegl/default.nix
+++ b/pkgs/development/libraries/gegl/default.nix
@@ -74,7 +74,7 @@ stdenv.mkDerivation rec {
     gexiv2
     openexr
     suitesparse
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     OpenCL
   ] ++ lib.optionals stdenv.cc.isClang [
     llvmPackages.openmp
@@ -114,7 +114,7 @@ stdenv.mkDerivation rec {
   '';
 
   # tests fail to connect to the com.apple.fonts daemon in sandboxed mode
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Graph-based image processing framework";
diff --git a/pkgs/development/libraries/gensio/default.nix b/pkgs/development/libraries/gensio/default.nix
index 8a895c36e865..6a183035efbe 100644
--- a/pkgs/development/libraries/gensio/default.nix
+++ b/pkgs/development/libraries/gensio/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ openssl ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ openssl ];
 
   meta = with lib; {
     description = "General Stream I/O";
diff --git a/pkgs/development/libraries/geoclue/default.nix b/pkgs/development/libraries/geoclue/default.nix
index 3c6a40eeb5cb..84fa20f8efad 100644
--- a/pkgs/development/libraries/geoclue/default.nix
+++ b/pkgs/development/libraries/geoclue/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
     avahi
   ] ++ lib.optionals withDemoAgent [
     libnotify gdk-pixbuf
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     modemmanager
   ];
 
@@ -83,7 +83,7 @@ stdenv.mkDerivation rec {
     "-Dmozilla-api-key=5c28d1f4-9511-47ff-b11a-2bef80fc177c"
     "-Ddbus-srv-user=geoclue"
     "-Ddbus-sys-dir=${placeholder "out"}/share/dbus-1/system.d"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-D3g-source=false"
     "-Dcdma-source=false"
     "-Dmodem-gps-source=false"
@@ -96,7 +96,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin && withDemoAgent;
+    broken = stdenv.hostPlatform.isDarwin && withDemoAgent;
     description = "Geolocation framework and some data providers";
     homepage = "https://gitlab.freedesktop.org/geoclue/geoclue/wikis/home";
     maintainers = with maintainers; [ raskin mimame ];
diff --git a/pkgs/development/libraries/geogram/default.nix b/pkgs/development/libraries/geogram/default.nix
index 619b5dfcdf57..444975de853c 100644
--- a/pkgs/development/libraries/geogram/default.nix
+++ b/pkgs/development/libraries/geogram/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
     ./replace-bundled-zlib.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isAarch64 ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isAarch64 ''
     substituteInPlace cmake/platforms/*/config.cmake \
       --replace "-m64" ""
   '';
@@ -120,7 +120,7 @@ stdenv.mkDerivation rec {
 
     # Broken on aarch64-linux as of version 1.8.3
     # See https://github.com/BrunoLevy/geogram/issues/74
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
 
     platforms = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
     maintainers = with maintainers; [ tmarkus ];
diff --git a/pkgs/development/libraries/geos/3.11.nix b/pkgs/development/libraries/geos/3.11.nix
index fb3eccf997a1..32e1f39965d7 100644
--- a/pkgs/development/libraries/geos/3.11.nix
+++ b/pkgs/development/libraries/geos/3.11.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ cmake ];
 
   # https://github.com/libgeos/geos/issues/930
-  cmakeFlags = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  cmakeFlags = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "-DCMAKE_CTEST_ARGUMENTS=--exclude-regex;unit-geom-Envelope"
   ];
 
diff --git a/pkgs/development/libraries/geos/default.nix b/pkgs/development/libraries/geos/default.nix
index 849fe64634a5..0cd143a1ded4 100644
--- a/pkgs/development/libraries/geos/default.nix
+++ b/pkgs/development/libraries/geos/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ cmake ];
 
   # https://github.com/libgeos/geos/issues/930
-  cmakeFlags = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  cmakeFlags = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "-DCMAKE_CTEST_ARGUMENTS=--exclude-regex;unit-geom-Envelope"
   ];
 
diff --git a/pkgs/development/libraries/getdns/default.nix b/pkgs/development/libraries/getdns/default.nix
index 69d7f17dafe7..b85dc689d96c 100644
--- a/pkgs/development/libraries/getdns/default.nix
+++ b/pkgs/development/libraries/getdns/default.nix
@@ -62,7 +62,7 @@ in rec {
     nativeBuildInputs = [ cmake doxygen yq ];
 
     buildInputs = [ getdns libyaml openssl systemd ]
-      ++ lib.optionals stdenv.isDarwin [ darwin.Security ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.Security ];
 
     postInstall = ''
       rm -r $out/share/doc
diff --git a/pkgs/development/libraries/gettext/default.nix b/pkgs/development/libraries/gettext/default.nix
index abb692aebc1e..0518a40c2930 100644
--- a/pkgs/development/libraries/gettext/default.nix
+++ b/pkgs/development/libraries/gettext/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
-  LDFLAGS = lib.optionalString stdenv.isSunOS "-lm -lmd -lmp -luutil -lnvpair -lnsl -lidmap -lavl -lsec";
+  LDFLAGS = lib.optionalString stdenv.hostPlatform.isSunOS "-lm -lmd -lmp -luutil -lnvpair -lnsl -lidmap -lavl -lsec";
 
   configureFlags = [
      "--disable-csharp"
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
   buildInputs = lib.optionals (!stdenv.hostPlatform.isMinGW) [
     bash
   ]
-  ++ lib.optionals (!stdenv.isLinux && !stdenv.hostPlatform.isCygwin) [
+  ++ lib.optionals (!stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isCygwin) [
     # HACK, see #10874 (and 14664)
     libiconv
   ];
@@ -102,6 +102,6 @@ stdenv.mkDerivation rec {
   };
 }
 
-// lib.optionalAttrs stdenv.isDarwin {
+// lib.optionalAttrs stdenv.hostPlatform.isDarwin {
   makeFlags = [ "CFLAGS=-D_FORTIFY_SOURCE=0" ];
 }
diff --git a/pkgs/development/libraries/gexiv2/default.nix b/pkgs/development/libraries/gexiv2/default.nix
index c560a3fc10e9..7a0e61cbf2b0 100644
--- a/pkgs/development/libraries/gexiv2/default.nix
+++ b/pkgs/development/libraries/gexiv2/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   preCheck = let
-    libSuffix = if stdenv.isDarwin then "2.dylib" else "so.2";
+    libSuffix = if stdenv.hostPlatform.isDarwin then "2.dylib" else "so.2";
   in ''
     # Our gobject-introspection patches make the shared library paths absolute
     # in the GIR files. When running unit tests, the library is not yet installed,
diff --git a/pkgs/development/libraries/gfxstream/default.nix b/pkgs/development/libraries/gfxstream/default.nix
index e3164c95a4c6..6dd5a11e841f 100644
--- a/pkgs/development/libraries/gfxstream/default.nix
+++ b/pkgs/development/libraries/gfxstream/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   ];
 
   # Ensure that meson can find an Objective-C compiler on Darwin.
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace meson.build \
       --replace-fail "project('gfxstream_backend', 'cpp', 'c'" "project('gfxstream_backend', 'cpp', 'c', 'objc'"
   '';
@@ -30,7 +30,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ meson ninja pkg-config python3 ];
   buildInputs = [ aemu libglvnd vulkan-headers vulkan-loader xorg.libX11 ]
     ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform libdrm) [ libdrm ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Cocoa
       darwin.apple_sdk.frameworks.CoreGraphics
       darwin.apple_sdk.frameworks.IOKit
@@ -39,7 +39,7 @@ stdenv.mkDerivation {
       darwin.apple_sdk.frameworks.QuartzCore
     ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_LDFLAGS = toString [
       "-framework Cocoa"
       "-framework IOKit"
@@ -51,7 +51,7 @@ stdenv.mkDerivation {
   };
 
   # dlopens libvulkan.
-  preConfigure = lib.optionalString (!stdenv.isDarwin) ''
+  preConfigure = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mesonFlagsArray=(-Dcpp_link_args="-Wl,--push-state -Wl,--no-as-needed -lvulkan -Wl,--pop-state")
   '';
 
diff --git a/pkgs/development/libraries/giflib/default.nix b/pkgs/development/libraries/giflib/default.nix
index cc5ef6f64369..c6dd7c81833f 100644
--- a/pkgs/development/libraries/giflib/default.nix
+++ b/pkgs/development/libraries/giflib/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     ./mingw-install-exes.patch
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/development/libraries/givaro/default.nix b/pkgs/development/libraries/givaro/default.nix
index 44fe14396836..a77cc10e2e36 100644
--- a/pkgs/development/libraries/givaro/default.nix
+++ b/pkgs/development/libraries/givaro/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--without-archnative"
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     # disable SIMD instructions (which are enabled *when available* by default)
     "--${if stdenv.hostPlatform.sse3Support   then "enable" else "disable"}-sse3"
     "--${if stdenv.hostPlatform.ssse3Support  then "enable" else "disable"}-ssse3"
diff --git a/pkgs/development/libraries/gjs/default.nix b/pkgs/development/libraries/gjs/default.nix
index 604435cee510..99fb182bc88d 100644
--- a/pkgs/development/libraries/gjs/default.nix
+++ b/pkgs/development/libraries/gjs/default.nix
@@ -83,11 +83,11 @@ in stdenv.mkDerivation (finalAttrs: {
 
   mesonFlags = [
     "-Dinstalled_test_prefix=${placeholder "installedTests"}"
-  ] ++ lib.optionals (!stdenv.isLinux || stdenv.hostPlatform.isMusl) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isMusl) [
     "-Dprofiler=disabled"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     patchShebangs build/choose-tests-locale.sh
@@ -130,7 +130,7 @@ in stdenv.mkDerivation (finalAttrs: {
     runHook postCheck
   '';
 
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   passthru = {
     tests = {
diff --git a/pkgs/development/libraries/gl2ps/default.nix b/pkgs/development/libraries/gl2ps/default.nix
index f1d67c8c8855..eec23cef70bc 100644
--- a/pkgs/development/libraries/gl2ps/default.nix
+++ b/pkgs/development/libraries/gl2ps/default.nix
@@ -26,11 +26,11 @@ stdenv.mkDerivation rec {
   buildInputs = [
     zlib
     libpng
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libGL
     libGLU
     libglut
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.OpenGL
   ];
 
diff --git a/pkgs/development/libraries/glew/1.10.nix b/pkgs/development/libraries/glew/1.10.nix
index 5d8f155a5c61..a675eebaa342 100644
--- a/pkgs/development/libraries/glew/1.10.nix
+++ b/pkgs/development/libraries/glew/1.10.nix
@@ -13,8 +13,8 @@ stdenv.mkDerivation (finalAttrs: {
     sha256 = "01zki46dr5khzlyywr3cg615bcal32dazfazkf360s1znqh17i4r";
   };
 
-  buildInputs = if stdenv.isDarwin then [ AGL ] else [ libXmu libXi libXext ];
-  propagatedBuildInputs = if stdenv.isDarwin then [ OpenGL ] else [ libGLU ]; # GL/glew.h includes GL/glu.h
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ AGL ] else [ libXmu libXi libXext ];
+  propagatedBuildInputs = if stdenv.hostPlatform.isDarwin then [ OpenGL ] else [ libGLU ]; # GL/glew.h includes GL/glu.h
 
   outputs = [ "out" "dev" ];
 
diff --git a/pkgs/development/libraries/glew/default.nix b/pkgs/development/libraries/glew/default.nix
index 5b774f58717c..8d68ad086764 100644
--- a/pkgs/development/libraries/glew/default.nix
+++ b/pkgs/development/libraries/glew/default.nix
@@ -8,7 +8,7 @@
 , libXi
 , libXext
 , OpenGL
-, enableEGL ? (!stdenv.isDarwin)
+, enableEGL ? (!stdenv.hostPlatform.isDarwin)
 , testers
 , mesa
 }:
@@ -40,8 +40,8 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ libXmu libXi libXext ];
-  propagatedBuildInputs = if stdenv.isDarwin then [ OpenGL ] else [ libGLU ]; # GL/glew.h includes GL/glu.h
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ libXmu libXi libXext ];
+  propagatedBuildInputs = if stdenv.hostPlatform.isDarwin then [ OpenGL ] else [ libGLU ]; # GL/glew.h includes GL/glu.h
 
   cmakeDir = "cmake";
   cmakeFlags = [
diff --git a/pkgs/development/libraries/glib/default.nix b/pkgs/development/libraries/glib/default.nix
index 22df229d47cc..f44b6385b8f1 100644
--- a/pkgs/development/libraries/glib/default.nix
+++ b/pkgs/development/libraries/glib/default.nix
@@ -30,7 +30,7 @@
   stdenv.hostPlatform.isLittleEndian == stdenv.buildPlatform.isLittleEndian
 }:
 
-assert stdenv.isLinux -> util-linuxMinimal != null;
+assert stdenv.hostPlatform.isLinux -> util-linuxMinimal != null;
 
 let
   # Some packages don't get "Cflags" from pkg-config correctly
@@ -68,7 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-JOApxd/JtE5Fc2l63zMHipgnxIk4VVAEs7kJb6TqA08=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     ./darwin-compilation.patch
     # FIXME: remove when https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4088 is merged and is in the tagged release
     (fetchpatch {
@@ -142,10 +142,10 @@ stdenv.mkDerivation (finalAttrs: {
     bash gnum4 # install glib-gettextize and m4 macros for other apps to use
   ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform elfutils) [
     elfutils
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libselinux
     util-linuxMinimal # for libmount
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     AppKit Carbon Cocoa CoreFoundation CoreServices Foundation
   ]);
 
@@ -185,7 +185,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Dtests=${lib.boolToString (!stdenv.hostPlatform.isStatic)}"
   ] ++ lib.optionals (!lib.meta.availableOn stdenv.hostPlatform elfutils) [
     "-Dlibelf=disabled"
-  ] ++ lib.optionals stdenv.isFreeBSD [
+  ] ++ lib.optionals stdenv.hostPlatform.isFreeBSD [
     "-Db_lundef=false"
     "-Dxattr=false"
   ];
@@ -291,7 +291,7 @@ stdenv.mkDerivation (finalAttrs: {
     rm $out/lib/libglib-${librarySuffix}
   '';
 
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   passthru = rec {
     gioModuleDir = "lib/gio/modules";
diff --git a/pkgs/development/libraries/glibc/common.nix b/pkgs/development/libraries/glibc/common.nix
index be55dd89b7c6..6ab9d2bed560 100644
--- a/pkgs/development/libraries/glibc/common.nix
+++ b/pkgs/development/libraries/glibc/common.nix
@@ -205,7 +205,7 @@ stdenv.mkDerivation ({
 
   env = {
     linuxHeaders = lib.optionalString withLinuxHeaders linuxHeaders;
-    inherit (stdenv) is64bit;
+    inherit (stdenv.hostPlatform) is64bit;
     # Needed to install share/zoneinfo/zone.tab.  Set to impure /bin/sh to
     # prevent a retained dependency on the bootstrap tools in the stdenv-linux
     # bootstrap.
diff --git a/pkgs/development/libraries/glibmm/2.68.nix b/pkgs/development/libraries/glibmm/2.68.nix
index acace1c6a5bf..7662e5f7f190 100644
--- a/pkgs/development/libraries/glibmm/2.68.nix
+++ b/pkgs/development/libraries/glibmm/2.68.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     glib # for glib-compile-schemas
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
diff --git a/pkgs/development/libraries/glibmm/default.nix b/pkgs/development/libraries/glibmm/default.nix
index f9f8a4568a57..668f60ec10ec 100644
--- a/pkgs/development/libraries/glibmm/default.nix
+++ b/pkgs/development/libraries/glibmm/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     glib # for glib-compile-schemas
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Cocoa
   ]);
   propagatedBuildInputs = [ glib libsigcxx ];
diff --git a/pkgs/development/libraries/glog/default.nix b/pkgs/development/libraries/glog/default.nix
index 53377022ad69..ac425092128c 100644
--- a/pkgs/development/libraries/glog/default.nix
+++ b/pkgs/development/libraries/glog/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
         # Clang optimizes an expected allocation away.
         # See https://github.com/google/glog/issues/937
         "DeathNoAllocNewHook.logging"
-      ] ++ lib.optionals stdenv.isDarwin [
+      ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
         "LogBacktraceAt.DoesBacktraceAtRightLineWhenEnabled"
       ];
     in
@@ -51,9 +51,9 @@ stdenv.mkDerivation rec {
 
   checkPhase =
     let
-      excludedTests = lib.optionals stdenv.isDarwin [
+      excludedTests = lib.optionals stdenv.hostPlatform.isDarwin [
         "mock-log"
-      ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+      ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
         "logging"   # works around segfaults on aarch64-darwin for now
       ];
       excludedTestsRegex = lib.optionalString (excludedTests != [ ]) "(${lib.concatStringsSep "|" excludedTests})";
diff --git a/pkgs/development/libraries/gmime/3.nix b/pkgs/development/libraries/gmime/3.nix
index 0d1997cf1afc..f21dd724c95e 100644
--- a/pkgs/development/libraries/gmime/3.nix
+++ b/pkgs/development/libraries/gmime/3.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
       substituteInPlace tests/testsuite.c \
         --replace /bin/rm rm
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # This specific test fails on darwin for some unknown reason
       substituteInPlace tests/test-filters.c \
         --replace-fail 'test_charset_conversion (datadir, "japanese", "utf-8", "iso-2022-jp");' ""
diff --git a/pkgs/development/libraries/gmp/4.3.2.nix b/pkgs/development/libraries/gmp/4.3.2.nix
index e809ed926eda..9d014c266753 100644
--- a/pkgs/development/libraries/gmp/4.3.2.nix
+++ b/pkgs/development/libraries/gmp/4.3.2.nix
@@ -24,13 +24,13 @@ let self = stdenv.mkDerivation rec {
   # addition, `configfsf.guess' would return `i386-apple-darwin10.2.0' on
   # `x86_64-darwin', leading to a 32-bit ABI build, which is undesirable.
   preConfigure =
-    if !stdenv.isDarwin
+    if !stdenv.hostPlatform.isDarwin
     then "ln -sf configfsf.guess config.guess"
     else ''echo "Darwin host is `./config.guess`."'';
 
   configureFlags = [
     (lib.enableFeature cxx "cxx")
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "ac_cv_build=x86_64-apple-darwin13.4.0"
     "ac_cv_host=x86_64-apple-darwin13.4.0"
   ];
@@ -72,7 +72,7 @@ let self = stdenv.mkDerivation rec {
     platforms = lib.platforms.all;
     badPlatforms = [ "x86_64-darwin" ];
     # never built on aarch64-darwin, aarch64-linux since first introduction in nixpkgs
-    broken = (stdenv.isDarwin && stdenv.isAarch64) || (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 };
   in self
diff --git a/pkgs/development/libraries/gmp/5.1.x.nix b/pkgs/development/libraries/gmp/5.1.x.nix
index e4fb89d054da..43e3ca9759eb 100644
--- a/pkgs/development/libraries/gmp/5.1.x.nix
+++ b/pkgs/development/libraries/gmp/5.1.x.nix
@@ -24,7 +24,7 @@ let self = stdenv.mkDerivation rec {
 
   patches = [
     ./5.1.3-CVE-2021-43618.patch
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ./need-size-t.patch
   ];
 
@@ -36,13 +36,13 @@ let self = stdenv.mkDerivation rec {
     # See <https://hydra.nixos.org/build/2760931>, for instance.
     #
     # no darwin because gmp uses ASM that clang doesn't like
-    (lib.enableFeature (!stdenv.isSunOS && stdenv.hostPlatform.isx86) "fat")
+    (lib.enableFeature (!stdenv.hostPlatform.isSunOS && stdenv.hostPlatform.isx86) "fat")
     # The config.guess in GMP tries to runtime-detect various
     # ARM optimization flags via /proc/cpuinfo (and is also
     # broken on multicore CPUs). Avoid this impurity.
     "--build=${stdenv.buildPlatform.config}"
-  ] ++ optional (cxx && stdenv.isDarwin) "CPPFLAGS=-fexceptions"
-    ++ optional (stdenv.isDarwin && stdenv.is64bit) "ABI=64"
+  ] ++ optional (cxx && stdenv.hostPlatform.isDarwin) "CPPFLAGS=-fexceptions"
+    ++ optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.is64bit) "ABI=64"
     ;
 
   doCheck = true;
@@ -81,7 +81,7 @@ let self = stdenv.mkDerivation rec {
     platforms = platforms.all;
     badPlatforms = [ "x86_64-darwin" ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 };
   in self
diff --git a/pkgs/development/libraries/gmp/6.x.nix b/pkgs/development/libraries/gmp/6.x.nix
index 3187b529aa17..e1a8ff0ecdc1 100644
--- a/pkgs/development/libraries/gmp/6.x.nix
+++ b/pkgs/development/libraries/gmp/6.x.nix
@@ -38,13 +38,13 @@ let self = stdenv.mkDerivation rec {
     # See <https://hydra.nixos.org/build/2760931>, for instance.
     #
     # no darwin because gmp uses ASM that clang doesn't like
-    (lib.enableFeature (!stdenv.isSunOS && stdenv.hostPlatform.isx86) "fat")
+    (lib.enableFeature (!stdenv.hostPlatform.isSunOS && stdenv.hostPlatform.isx86) "fat")
     # The config.guess in GMP tries to runtime-detect various
     # ARM optimization flags via /proc/cpuinfo (and is also
     # broken on multicore CPUs). Avoid this impurity.
     "--build=${stdenv.buildPlatform.config}"
-  ] ++ optional (cxx && stdenv.isDarwin) "CPPFLAGS=-fexceptions"
-    ++ optional (stdenv.isDarwin && stdenv.is64bit) "ABI=64"
+  ] ++ optional (cxx && stdenv.hostPlatform.isDarwin) "CPPFLAGS=-fexceptions"
+    ++ optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.is64bit) "ABI=64"
     # to build a .dll on windows, we need --disable-static + --enable-shared
     # see https://gmplib.org/manual/Notes-for-Particular-Systems.html
     ++ optional (!withStatic && stdenv.hostPlatform.isWindows) "--disable-static --enable-shared"
diff --git a/pkgs/development/libraries/gnome-desktop/default.nix b/pkgs/development/libraries/gnome-desktop/default.nix
index db95029c804e..381da5b8f9fd 100644
--- a/pkgs/development/libraries/gnome-desktop/default.nix
+++ b/pkgs/development/libraries/gnome-desktop/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-QsdzdF2EuhS8HPHExvRgYUiAOlzTN5QcY5ZHlfPFnUI=";
   };
 
-  patches = lib.optionals stdenv.isLinux [
+  patches = lib.optionals stdenv.hostPlatform.isLinux [
     (substituteAll {
       src = ./bubblewrap-paths.patch;
       bubblewrap_bin = "${bubblewrap}/bin/bwrap";
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
     gtk3
     gtk4
     glib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     bubblewrap
     wayland
     libseccomp
@@ -78,12 +78,12 @@ stdenv.mkDerivation rec {
   mesonFlags = [
     "-Dgtk_doc=true"
     "-Ddesktop_docs=false"
-  ] ++ lib.optionals (!stdenv.isLinux) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Dsystemd=disabled"
     "-Dudev=disabled"
   ];
 
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   passthru = {
     updateScript = gnome.updateScript {
diff --git a/pkgs/development/libraries/gnome-online-accounts/default.nix b/pkgs/development/libraries/gnome-online-accounts/default.nix
index dc797dd02d16..8a1773612f2d 100644
--- a/pkgs/development/libraries/gnome-online-accounts/default.nix
+++ b/pkgs/development/libraries/gnome-online-accounts/default.nix
@@ -8,7 +8,7 @@
 , ninja
 , libxslt
 , gtk4
-, enableBackend ? stdenv.isLinux
+, enableBackend ? stdenv.hostPlatform.isLinux
 , json-glib
 , libadwaita
 , librest_1_0
diff --git a/pkgs/development/libraries/gnutls/default.nix b/pkgs/development/libraries/gnutls/default.nix
index f1ecc1e9939f..3e9395668c85 100644
--- a/pkgs/development/libraries/gnutls/default.nix
+++ b/pkgs/development/libraries/gnutls/default.nix
@@ -52,7 +52,7 @@ let
 
   # XXX: Gnulib's `test-select' fails on FreeBSD:
   # https://hydra.nixos.org/build/2962084/nixlog/1/raw .
-  doCheck = !stdenv.isFreeBSD && !stdenv.isDarwin
+  doCheck = !stdenv.hostPlatform.isFreeBSD && !stdenv.hostPlatform.isDarwin
     && stdenv.buildPlatform == stdenv.hostPlatform;
 
   inherit (stdenv.hostPlatform) isDarwin;
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     sed 's:/usr/lib64/pkcs11/ /usr/lib/pkcs11/ /usr/lib/x86_64-linux-gnu/pkcs11/:`pkg-config --variable=p11_module_path p11-kit-1`:' -i tests/p11-kit-trust.sh
   '' + lib.optionalString stdenv.hostPlatform.isMusl '' # See https://gitlab.com/gnutls/gnutls/-/issues/945
     sed '2iecho "certtool tests skipped in musl build"\nexit 0' -i tests/cert-tests/certtool.sh
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     sed '2iexit 77' -i tests/{ktls,ktls_keyupdate}.sh
   '';
 
@@ -115,7 +115,7 @@ stdenv.mkDerivation rec {
       "--with-unbound-root-key-file=${dns-root-data}/root.key"
       (lib.withFeature withP11-kit "p11-kit")
       (lib.enableFeature cxxBindings "cxx")
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       "--enable-ktls"
     ] ++ lib.optionals (stdenv.hostPlatform.isMinGW) [
       "--disable-doc"
@@ -127,7 +127,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ lzo lzip libtasn1 libidn2 zlib gmp libunistring unbound gettext libiconv ]
     ++ lib.optional (withP11-kit) p11-kit
-    ++ lib.optional (tpmSupport && stdenv.isLinux) trousers;
+    ++ lib.optional (tpmSupport && stdenv.hostPlatform.isLinux) trousers;
 
   nativeBuildInputs = [ perl pkg-config texinfo ] ++ [ autoconf automake ]
     ++ lib.optionals doCheck [ which nettools util-linux ];
diff --git a/pkgs/development/libraries/gobject-introspection/default.nix b/pkgs/development/libraries/gobject-introspection/default.nix
index d58bdd2e7800..a76764a49a91 100644
--- a/pkgs/development/libraries/gobject-introspection/default.nix
+++ b/pkgs/development/libraries/gobject-introspection/default.nix
@@ -90,7 +90,7 @@ stdenv.mkDerivation (finalAttrs: {
     (python3.withPackages pythonModules)
   ];
 
-  nativeCheckInputs = lib.optionals stdenv.isDarwin [
+  nativeCheckInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     cctools # for otool
   ];
 
@@ -117,7 +117,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Dgi_cross_use_prebuilt_gi=true"
   ];
 
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   # During configurePhase, two python scripts are generated and need this. See
   # https://github.com/NixOS/nixpkgs/pull/98316#issuecomment-695785692
diff --git a/pkgs/development/libraries/gom/default.nix b/pkgs/development/libraries/gom/default.nix
index 96b1f3ae13ce..0df28ac88dfd 100644
--- a/pkgs/development/libraries/gom/default.nix
+++ b/pkgs/development/libraries/gom/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   ];
 
   # Success is more likely on x86_64
-  doCheck = stdenv.isx86_64;
+  doCheck = stdenv.hostPlatform.isx86_64;
 
   passthru = {
     updateScript = gnome.updateScript {
diff --git a/pkgs/development/libraries/google-cloud-cpp/default.nix b/pkgs/development/libraries/google-cloud-cpp/default.nix
index 4d8ef6821240..e8caeadcd32d 100644
--- a/pkgs/development/libraries/google-cloud-cpp/default.nix
+++ b/pkgs/development/libraries/google-cloud-cpp/default.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation rec {
   ];
 
   # https://hydra.nixos.org/build/222679737/nixlog/3/tail
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isAarch64 "-Wno-error=maybe-uninitialized";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isAarch64 "-Wno-error=maybe-uninitialized";
 
   doInstallCheck = true;
 
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
         "$PWD/google/cloud/storage/benchmarks"
         "$PWD/google/cloud/testing_util"
       ];
-      ldLibraryPathName = "${lib.optionalString stdenv.isDarwin "DY"}LD_LIBRARY_PATH";
+      ldLibraryPathName = "${lib.optionalString stdenv.hostPlatform.isDarwin "DY"}LD_LIBRARY_PATH";
     in
     lib.optionalString doInstallCheck (
       lib.optionalString (!staticOnly) ''
diff --git a/pkgs/development/libraries/gperftools/default.nix b/pkgs/development/libraries/gperftools/default.nix
index e76c033c705d..62e7ecbb0e95 100644
--- a/pkgs/development/libraries/gperftools/default.nix
+++ b/pkgs/development/libraries/gperftools/default.nix
@@ -31,18 +31,18 @@ stdenv.mkDerivation rec {
 
   # tcmalloc uses libunwind in a way that works correctly only on non-ARM dynamically linked linux
   buildInputs = [ perl ]
-             ++ lib.optional (stdenv.isLinux && !(stdenv.hostPlatform.isAarch || stdenv.hostPlatform.isStatic )) libunwind;
+             ++ lib.optional (stdenv.hostPlatform.isLinux && !(stdenv.hostPlatform.isAarch || stdenv.hostPlatform.isStatic )) libunwind;
 
   # Disable general dynamic TLS on AArch to support dlopen()'ing the library:
   # https://bugzilla.redhat.com/show_bug.cgi?id=1483558
   configureFlags = lib.optional stdenv.hostPlatform.isAarch
     "--disable-general-dynamic-tls";
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile.am --replace stdc++ c++
   '';
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin
     "-D_XOPEN_SOURCE";
 
   # some packages want to link to the static tcmalloc_minimal
diff --git a/pkgs/development/libraries/gpgme/default.nix b/pkgs/development/libraries/gpgme/default.nix
index fa4bb1be6dd3..45df332bc0ca 100644
--- a/pkgs/development/libraries/gpgme/default.nix
+++ b/pkgs/development/libraries/gpgme/default.nix
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     # which has a path length limit. Nix on darwin is using a build directory
     # that already has quite a long path and the resulting socket path doesn't
     # fit in the limit. https://github.com/NixOS/nix/pull/1085
-    ++ lib.optionals stdenv.isDarwin [ "--disable-gpg-test" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--disable-gpg-test" ];
 
   env.NIX_CFLAGS_COMPILE = toString (
     # qgpgme uses Q_ASSERT which retains build inputs at runtime unless
diff --git a/pkgs/development/libraries/graphene/default.nix b/pkgs/development/libraries/graphene/default.nix
index 0364b9ecfaaf..803f31efa47a 100644
--- a/pkgs/development/libraries/graphene/default.nix
+++ b/pkgs/development/libraries/graphene/default.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.mesonEnable "introspection" withIntrospection)
     "-Dinstalled_test_datadir=${placeholder "installedTests"}/share"
     "-Dinstalled_test_bindir=${placeholder "installedTests"}/libexec"
-  ] ++ lib.optionals stdenv.isAarch32 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch32 [
     # the box test is failing with SIGBUS on armv7l-linux
     # https://github.com/ebassi/graphene/issues/215
     "-Darm_neon=false"
diff --git a/pkgs/development/libraries/grpc/default.nix b/pkgs/development/libraries/grpc/default.nix
index 2110755a1719..35ae5284af5a 100644
--- a/pkgs/development/libraries/grpc/default.nix
+++ b/pkgs/development/libraries/grpc/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) grpc;
   propagatedBuildInputs = [ c-ares re2 zlib abseil-cpp ];
   buildInputs = [ openssl protobuf ]
-    ++ lib.optionals stdenv.isLinux [ libnsl ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libnsl ];
 
   cmakeFlags = [
     "-DgRPC_ZLIB_PROVIDER=package"
@@ -91,7 +91,7 @@ stdenv.mkDerivation rec {
 
   env.NIX_CFLAGS_COMPILE = toString ([
     "-Wno-error"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Workaround for https://github.com/llvm/llvm-project/issues/48757
     "-Wno-elaborated-enum-base"
   ]);
diff --git a/pkgs/development/libraries/gsl-lite/default.nix b/pkgs/development/libraries/gsl-lite/default.nix
index fcab02095264..03fc5587f80a 100644
--- a/pkgs/development/libraries/gsl-lite/default.nix
+++ b/pkgs/development/libraries/gsl-lite/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     };
 
   # Building tests is broken on Darwin.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = ''
diff --git a/pkgs/development/libraries/gsl/default.nix b/pkgs/development/libraries/gsl/default.nix
index 2211f2d0d99f..aeb95476b2b6 100644
--- a/pkgs/development/libraries/gsl/default.nix
+++ b/pkgs/development/libraries/gsl/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  preConfigure = if (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11" && stdenv.isDarwin) then ''
+  preConfigure = if (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11" && stdenv.hostPlatform.isDarwin) then ''
     MACOSX_DEPLOYMENT_TARGET=10.16
   '' else null;
 
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   '';
 
   # do not let -march=skylake to enable FMA (https://lists.gnu.org/archive/html/bug-gsl/2011-11/msg00019.html)
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isx86_64 "-mno-fma";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isx86_64 "-mno-fma";
 
   # https://lists.gnu.org/archive/html/bug-gsl/2015-11/msg00012.html
   doCheck = stdenv.hostPlatform.system != "i686-linux";
diff --git a/pkgs/development/libraries/gsm/default.nix b/pkgs/development/libraries/gsm/default.nix
index ae2c489fe832..5905fdff7e48 100644
--- a/pkgs/development/libraries/gsm/default.nix
+++ b/pkgs/development/libraries/gsm/default.nix
@@ -4,7 +4,7 @@
 }:
 
 let
-  inherit (stdenv) isDarwin;
+  inherit (stdenv.hostPlatform) isDarwin;
   inherit (lib) optional optionalString;
 in
 
diff --git a/pkgs/development/libraries/gss/default.nix b/pkgs/development/libraries/gss/default.nix
index 42d22c2bd5fe..1271c52a4a8c 100644
--- a/pkgs/development/libraries/gss/default.nix
+++ b/pkgs/development/libraries/gss/default.nix
@@ -1,7 +1,7 @@
 { lib
 , stdenv
 , fetchurl
-, withShishi ? !stdenv.isDarwin
+, withShishi ? !stdenv.hostPlatform.isDarwin
 , shishi
 }:
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   buildInputs = lib.optional withShishi shishi;
 
   # ./stdint.h:89:5: error: expected value in expression
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export GNULIBHEADERS_OVERRIDE_WINT_T=0
   '';
 
diff --git a/pkgs/development/libraries/gssdp/1.6.nix b/pkgs/development/libraries/gssdp/1.6.nix
index 468c2a84ca28..d52c90b41b91 100644
--- a/pkgs/development/libraries/gssdp/1.6.nix
+++ b/pkgs/development/libraries/gssdp/1.6.nix
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "GObject-based API for handling resource discovery and announcement over SSDP";
     homepage = "http://www.gupnp.org/";
     license = licenses.lgpl2Plus;
diff --git a/pkgs/development/libraries/gssdp/default.nix b/pkgs/development/libraries/gssdp/default.nix
index 939fb0e7b426..c42b6f958092 100644
--- a/pkgs/development/libraries/gssdp/default.nix
+++ b/pkgs/development/libraries/gssdp/default.nix
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
   ];
 
   # Bail out! GLib-GIO-FATAL-CRITICAL: g_inet_address_to_string: assertion 'G_IS_INET_ADDRESS (address)' failed
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postFixup = lib.optionalString (stdenv.buildPlatform == stdenv.hostPlatform) ''
     # Move developer documentation to devdoc output.
diff --git a/pkgs/development/libraries/gstreamer/bad/default.nix b/pkgs/development/libraries/gstreamer/bad/default.nix
index bf27c6f25d7b..3ab9c896b8bf 100644
--- a/pkgs/development/libraries/gstreamer/bad/default.nix
+++ b/pkgs/development/libraries/gstreamer/bad/default.nix
@@ -104,7 +104,7 @@
 , Foundation
 , MediaToolbox
 , enableGplPlugins ? true
-, bluezSupport ? stdenv.isLinux
+, bluezSupport ? stdenv.hostPlatform.isLinux
 # Causes every application using GstDeviceMonitor to send mDNS queries every 2 seconds
 , microdnsSupport ? false
 # Checks meson.is_cross_build(), so even canExecute isn't enough.
@@ -142,7 +142,7 @@ stdenv.mkDerivation rec {
     gobject-introspection
   ] ++ lib.optionals enableDocumentation [
     hotdoc
-  ] ++ lib.optionals (gst-plugins-base.waylandEnabled && stdenv.isLinux) [
+  ] ++ lib.optionals (gst-plugins-base.waylandEnabled && stdenv.hostPlatform.isLinux) [
     wayland-scanner
   ];
 
@@ -214,11 +214,11 @@ stdenv.mkDerivation rec {
     libmicrodns
   ] ++ lib.optionals openh264Support [
     openh264
-  ] ++ lib.optionals (gst-plugins-base.waylandEnabled && stdenv.isLinux) [
+  ] ++ lib.optionals (gst-plugins-base.waylandEnabled && stdenv.hostPlatform.isLinux) [
     libva # vaapi requires libva -> libdrm -> libpciaccess, which is Linux-only in nixpkgs
     wayland
     wayland-protocols
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     # TODO: mjpegtools uint64_t is not compatible with guint64 on Darwin
     mjpegtools
 
@@ -245,9 +245,9 @@ stdenv.mkDerivation rec {
     libGLU
   ] ++ lib.optionals guiSupport [
     gtk3
-  ] ++ lib.optionals (stdenv.isLinux && guiSupport) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && guiSupport) [
     directfb
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # For unknown reasons the order is important, e.g. if
     # VideoToolbox is last, we get:
     #     fatal error: 'VideoToolbox/VideoToolbox.h' file not found
@@ -306,14 +306,14 @@ stdenv.mkDerivation rec {
     (lib.mesonEnable "openh264" openh264Support)
     (lib.mesonEnable "doc" enableDocumentation)
   ]
-  ++ lib.optionals (!stdenv.isLinux) [
+  ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Ddoc=disabled" # needs gstcuda to be enabled which is Linux-only
     "-Dnvcodec=disabled" # Linux-only
-  ] ++ lib.optionals (!stdenv.isLinux || !gst-plugins-base.waylandEnabled) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux || !gst-plugins-base.waylandEnabled) [
     "-Dva=disabled" # see comment on `libva` in `buildInputs`
-  ] ++ lib.optionals (!stdenv.isLinux || !guiSupport) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux || !guiSupport) [
     "-Ddirectfb=disabled"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-Daja=disabled"
     "-Dchromaprint=disabled"
     "-Dflite=disabled"
@@ -327,7 +327,7 @@ stdenv.mkDerivation rec {
     "-Duvch264=disabled" # requires gudev
     "-Dv4l2codecs=disabled" # requires gudev
     "-Dladspa=disabled" # requires lrdf
-  ] ++ lib.optionals (!stdenv.isLinux || !stdenv.isx86_64 || !gst-plugins-base.waylandEnabled) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux || !stdenv.hostPlatform.isx86_64 || !gst-plugins-base.waylandEnabled) [
     "-Dqsv=disabled" # Linux (and Windows) x86 only, makes va required
   ] ++ lib.optionals (!gst-plugins-base.glEnabled) [
     "-Dgl=disabled"
diff --git a/pkgs/development/libraries/gstreamer/base/default.nix b/pkgs/development/libraries/gstreamer/base/default.nix
index 3d55425190f6..9932c37a72f2 100644
--- a/pkgs/development/libraries/gstreamer/base/default.nix
+++ b/pkgs/development/libraries/gstreamer/base/default.nix
@@ -20,23 +20,23 @@
 , tremor # provides 'virbisidec'
 , libGL
 , gobject-introspection
-, enableX11 ? stdenv.isLinux
+, enableX11 ? stdenv.hostPlatform.isLinux
 , libXext
 , libXi
 , libXv
 , libdrm
-, enableWayland ? stdenv.isLinux
+, enableWayland ? stdenv.hostPlatform.isLinux
 , wayland-scanner
 , wayland
 , wayland-protocols
-, enableAlsa ? stdenv.isLinux
+, enableAlsa ? stdenv.hostPlatform.isLinux
 , alsa-lib
 # TODO: fix once x86_64-darwin sdk updated
-, enableCocoa ? (stdenv.isDarwin && stdenv.isAarch64)
+, enableCocoa ? (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
 , Cocoa
 , OpenGL
 , enableGl ? (enableX11 || enableWayland || enableCocoa)
-, enableCdparanoia ? (!stdenv.isDarwin)
+, enableCdparanoia ? (!stdenv.hostPlatform.isDarwin)
 , cdparanoia
 , glib
 , testers
@@ -91,11 +91,11 @@ stdenv.mkDerivation (finalAttrs: {
     libjpeg
     tremor
     pango
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libdrm
     libGL
     libvisual
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     OpenGL
   ] ++ lib.optionals enableAlsa [
     alsa-lib
@@ -111,7 +111,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   propagatedBuildInputs = [
     gstreamer
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libdrm
   ];
 
@@ -128,7 +128,7 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optional (!enableGl) "-Dgl=disabled"
   ++ lib.optional (!enableAlsa) "-Dalsa=disabled"
   ++ lib.optional (!enableCdparanoia) "-Dcdparanoia=disabled"
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-Ddrm=disabled"
     "-Dlibvisual=disabled"
   ];
diff --git a/pkgs/development/libraries/gstreamer/core/default.nix b/pkgs/development/libraries/gstreamer/core/default.nix
index d1094cfc8794..7eba093ab94b 100644
--- a/pkgs/development/libraries/gstreamer/core/default.nix
+++ b/pkgs/development/libraries/gstreamer/core/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
     glib
     bash-completion
     rustc
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap # for setcap binary
   ] ++ lib.optionals withIntrospection [
     gobject-introspection
@@ -74,13 +74,13 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [
     bash-completion
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap
   ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform elfutils) [
     elfutils
   ] ++ lib.optionals withLibunwind [
     libunwind
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
     CoreServices
   ];
diff --git a/pkgs/development/libraries/gstreamer/good/default.nix b/pkgs/development/libraries/gstreamer/good/default.nix
index 40c9cbc769c0..ec474972ef52 100644
--- a/pkgs/development/libraries/gstreamer/good/default.nix
+++ b/pkgs/development/libraries/gstreamer/good/default.nix
@@ -39,9 +39,9 @@
 , qt6Support ? false, qt6
 , raspiCameraSupport ? false, libraspberrypi
 , enableJack ? true, libjack2
-, enableX11 ? stdenv.isLinux, xorg
+, enableX11 ? stdenv.hostPlatform.isLinux, xorg
 , ncurses
-, enableWayland ? stdenv.isLinux
+, enableWayland ? stdenv.hostPlatform.isLinux
 , wayland
 , wayland-protocols
 , libgudev
@@ -54,7 +54,7 @@
 
 # MMAL is not supported on aarch64, see:
 # https://github.com/raspberrypi/userland/issues/688
-assert raspiCameraSupport -> (stdenv.isLinux && stdenv.isAarch32);
+assert raspiCameraSupport -> (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch32);
 
 stdenv.mkDerivation rec {
   pname = "gst-plugins-good";
@@ -147,9 +147,9 @@ stdenv.mkDerivation rec {
     qtbase
     qtdeclarative
     qtwayland
-  ]) ++ lib.optionals stdenv.isDarwin [
+  ]) ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libdrm
     libGL
     libv4l
@@ -177,7 +177,7 @@ stdenv.mkDerivation rec {
     "-Dximagesrc=disabled" # Linux-only
   ] ++ lib.optionals (!enableJack) [
     "-Djack=disabled"
-  ] ++ lib.optionals (!stdenv.isLinux) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Ddv1394=disabled" # Linux only
     "-Doss4=disabled" # Linux only
     "-Doss=disabled" # Linux only
diff --git a/pkgs/development/libraries/gstreamer/rs/default.nix b/pkgs/development/libraries/gstreamer/rs/default.nix
index 3e8eec7b8a60..187d1a048697 100644
--- a/pkgs/development/libraries/gstreamer/rs/default.nix
+++ b/pkgs/development/libraries/gstreamer/rs/default.nix
@@ -57,15 +57,15 @@ let
     mp4 = [ ];
 
     # net
-    aws = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+    aws = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
     hlssink3 = [ ];
     ndi = [ ];
     onvif = [ pango ];
     raptorq = [ ];
-    reqwest = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+    reqwest = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
     rtp = [ ];
-    webrtc = [ gst-plugins-bad openssl ] ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
-    webrtchttp = [ gst-plugins-bad openssl ] ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+    webrtc = [ gst-plugins-bad openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
+    webrtchttp = [ gst-plugins-bad openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
     # text
     textahead = [ ];
@@ -110,9 +110,9 @@ let
     [
       "csound" # tests have weird failure on x86, does not currently work on arm or darwin
       "livesync" # tests have suspicious intermittent failure, see https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/issues/357
-    ] ++ lib.optionals stdenv.isAarch64 [
+    ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       "raptorq" # pointer alignment failure in tests on aarch64
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "reqwest" # tests hang on darwin
       "threadshare" # tests cannot bind to localhost on darwin
       "webp" # not supported on darwin (upstream crate issue)
@@ -200,13 +200,13 @@ stdenv.mkDerivation (finalAttrs: {
     cargo
     cargo-c'
     nasm
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     lld
   ] ++ lib.optionals enableDocumentation [
     hotdoc
   ];
 
-  env = lib.optionalAttrs stdenv.isDarwin { NIX_CFLAGS_LINK = "-fuse-ld=lld"; };
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { NIX_CFLAGS_LINK = "-fuse-ld=lld"; };
 
   buildInputs = [
     gstreamer
diff --git a/pkgs/development/libraries/gstreamer/ugly/default.nix b/pkgs/development/libraries/gstreamer/ugly/default.nix
index 6f8ac715af50..f6a0ee93d89e 100644
--- a/pkgs/development/libraries/gstreamer/ugly/default.nix
+++ b/pkgs/development/libraries/gstreamer/ugly/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     libmad
     libmpeg2
     x264
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     IOKit
     CoreFoundation
     DiskArbitration
diff --git a/pkgs/development/libraries/gstreamer/vaapi/default.nix b/pkgs/development/libraries/gstreamer/vaapi/default.nix
index db154403ffb3..d7d788787a50 100644
--- a/pkgs/development/libraries/gstreamer/vaapi/default.nix
+++ b/pkgs/development/libraries/gstreamer/vaapi/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
     xorg.libICE
     nasm
     libvpx
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libGL
     libGLU
   ];
diff --git a/pkgs/development/libraries/gthree/default.nix b/pkgs/development/libraries/gthree/default.nix
index 3657f62f929c..c94a3ae15d15 100644
--- a/pkgs/development/libraries/gthree/default.nix
+++ b/pkgs/development/libraries/gthree/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
   ];
 
   mesonFlags = [
-    "-Dgtk_doc=${if stdenv.isDarwin then "false" else "true"}"
+    "-Dgtk_doc=${if stdenv.hostPlatform.isDarwin then "false" else "true"}"
     # Data for examples is useless when the example programs are not installed.
     "-Dexamples=false"
   ];
@@ -69,6 +69,6 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = [ ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gthree.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gthree.x86_64-darwin
   };
 }
diff --git a/pkgs/development/libraries/gtk-frdp/default.nix b/pkgs/development/libraries/gtk-frdp/default.nix
index b3edf0ba4853..69af8b31872e 100644
--- a/pkgs/development/libraries/gtk-frdp/default.nix
+++ b/pkgs/development/libraries/gtk-frdp/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     };
   };
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-DTARGET_OS_IPHONE=0"
     "-DTARGET_OS_WATCH=0"
   ]);
diff --git a/pkgs/development/libraries/gtk/2.x.nix b/pkgs/development/libraries/gtk/2.x.nix
index ed0900ee1a92..cb4b6955dea4 100644
--- a/pkgs/development/libraries/gtk/2.x.nix
+++ b/pkgs/development/libraries/gtk/2.x.nix
@@ -25,9 +25,9 @@
 , testers
 , AppKit
 , Cocoa
-, gdktarget ? if stdenv.isDarwin then "quartz" else "x11"
-, cupsSupport ? config.gtk2.cups or stdenv.isLinux
-, xineramaSupport ? stdenv.isLinux
+, gdktarget ? if stdenv.hostPlatform.isDarwin then "quartz" else "x11"
+, cupsSupport ? config.gtk2.cups or stdenv.hostPlatform.isLinux
+, xineramaSupport ? stdenv.hostPlatform.isLinux
 }:
 
 let
@@ -70,7 +70,7 @@ stdenv.mkDerivation (finalAttrs: {
       url = "https://gitlab.gnome.org/GNOME/gtk/-/commit/3bbf0b6176d42836d23c36a6ac410e807ec0a7a7.patch";
       hash = "sha256-mstOPk9NNpUwScrdEbvGhmAv8jlds3SBdj53T0q33vM=";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ./patches/2.0-gnome_bugzilla_557780_306776_freeciv_darwin.patch
     ./patches/2.0-darwin-x11.patch
     # Fixes an incompatible function pointer conversion and implicit int errors with clang 16.
@@ -83,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
     gdk-pixbuf
     glib
     pango
-  ] ++ lib.optionals (stdenv.isLinux || stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin) [
     libXcomposite
     libXcursor
     libXi
@@ -91,14 +91,14 @@ stdenv.mkDerivation (finalAttrs: {
     libXrender
   ] ++ lib.optional xineramaSupport libXinerama
   ++ lib.optional cupsSupport cups
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libXdamage
     AppKit
     Cocoa
   ];
 
   preConfigure =
-    lib.optionalString (stdenv.isDarwin
+    lib.optionalString (stdenv.hostPlatform.isDarwin
                         && lib.versionAtLeast
                           stdenv.hostPlatform.darwinMinVersion "11")
       "MACOSX_DEPLOYMENT_TARGET=10.16";
@@ -107,7 +107,7 @@ stdenv.mkDerivation (finalAttrs: {
     "--sysconfdir=/etc"
     "--with-gdktarget=${gdktarget}"
     "--with-xinput=yes"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--disable-glibtest"
     "--disable-introspection"
     "--disable-visibility"
diff --git a/pkgs/development/libraries/gtk/3.x.nix b/pkgs/development/libraries/gtk/3.x.nix
index ed0612bf2ecb..7f3717c8a525 100644
--- a/pkgs/development/libraries/gtk/3.x.nix
+++ b/pkgs/development/libraries/gtk/3.x.nix
@@ -33,15 +33,15 @@
 , gnome
 , gsettings-desktop-schemas
 , sassc
-, trackerSupport ? stdenv.isLinux && (stdenv.buildPlatform == stdenv.hostPlatform)
+, trackerSupport ? stdenv.hostPlatform.isLinux && (stdenv.buildPlatform == stdenv.hostPlatform)
 , tracker
-, x11Support ? stdenv.isLinux
-, waylandSupport ? stdenv.isLinux
+, x11Support ? stdenv.hostPlatform.isLinux
+, waylandSupport ? stdenv.hostPlatform.isLinux
 , libGL
 , wayland
 , wayland-protocols
-, xineramaSupport ? stdenv.isLinux
-, cupsSupport ? stdenv.isLinux
+, xineramaSupport ? stdenv.hostPlatform.isLinux
+, cupsSupport ? stdenv.hostPlatform.isLinux
 , cups
 , AppKit
 , Cocoa
@@ -83,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
   patches = [
     ./patches/3.0-immodules.cache.patch
     ./patches/3.0-Xft-setting-fallback-compute-DPI-properly.patch
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # X11 module requires <gio/gdesktopappinfo.h> which is not installed on Darwin
     # let’s drop that dependency in similar way to how other parts of the library do it
     # e.g. https://gitlab.gnome.org/GNOME/gtk/blob/3.24.4/gtk/gtk-launch.c#L31-33
@@ -120,7 +120,7 @@ stdenv.mkDerivation (finalAttrs: {
     libxkbcommon
     (libepoxy.override { inherit x11Support; })
     isocodes
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
   ] ++ lib.optionals trackerSupport [
     tracker
@@ -146,7 +146,7 @@ stdenv.mkDerivation (finalAttrs: {
     libXrandr
     libXrender
     pango
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # explicitly propagated, always needed
     Cocoa
     QuartzCore
@@ -166,13 +166,13 @@ stdenv.mkDerivation (finalAttrs: {
     "-Dtracker3=${lib.boolToString trackerSupport}"
     "-Dbroadway_backend=${lib.boolToString broadwaySupport}"
     "-Dx11_backend=${lib.boolToString x11Support}"
-    "-Dquartz_backend=${lib.boolToString (stdenv.isDarwin && !x11Support)}"
+    "-Dquartz_backend=${lib.boolToString (stdenv.hostPlatform.isDarwin && !x11Support)}"
     "-Dintrospection=${lib.boolToString withIntrospection}"
   ];
 
   doCheck = false; # needs X11
 
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   # These are the defines that'd you'd get with --enable-debug=minimum (default).
   # See: https://developer.gnome.org/gtk3/stable/gtk-building.html#extra-configuration-options
@@ -202,7 +202,7 @@ stdenv.mkDerivation (finalAttrs: {
     patchShebangs ''${files[@]}
   '';
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # The updater is needed for nixos env and it's tiny.
     moveToOutput bin/gtk-update-icon-cache "$out"
     # Launcher
@@ -219,14 +219,14 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   # Wrap demos
-  postFixup =  lib.optionalString (!stdenv.isDarwin) ''
+  postFixup =  lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     demos=(gtk3-demo gtk3-demo-application gtk3-icon-browser gtk3-widget-factory)
 
     for program in ''${demos[@]}; do
       wrapProgram $dev/bin/$program \
         --prefix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH:$out/share/gsettings-schemas/${finalAttrs.pname}-${finalAttrs.version}"
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # a comment created a cycle between outputs
     sed '/^# ModulesPath =/d' -i "$out"/lib/gtk-*/*/immodules.cache
   '';
diff --git a/pkgs/development/libraries/gtk/4.x.nix b/pkgs/development/libraries/gtk/4.x.nix
index 3a144b2de3ac..8b3ef020bd28 100644
--- a/pkgs/development/libraries/gtk/4.x.nix
+++ b/pkgs/development/libraries/gtk/4.x.nix
@@ -32,13 +32,13 @@
 , gsettings-desktop-schemas
 , gst_all_1
 , sassc
-, trackerSupport ? stdenv.isLinux
+, trackerSupport ? stdenv.hostPlatform.isLinux
 , tracker
-, x11Support ? stdenv.isLinux
-, waylandSupport ? stdenv.isLinux
+, x11Support ? stdenv.hostPlatform.isLinux
+, waylandSupport ? stdenv.hostPlatform.isLinux
 , libGL
 # experimental and can cause crashes in inspector
-, vulkanSupport ? stdenv.isLinux
+, vulkanSupport ? stdenv.hostPlatform.isLinux
 , shaderc
 , vulkan-loader
 , vulkan-headers
@@ -46,8 +46,8 @@
 , wayland
 , wayland-protocols
 , wayland-scanner
-, xineramaSupport ? stdenv.isLinux
-, cupsSupport ? stdenv.isLinux
+, xineramaSupport ? stdenv.hostPlatform.isLinux
+, cupsSupport ? stdenv.hostPlatform.isLinux
 , compileSchemas ? stdenv.hostPlatform.emulatorAvailable buildPackages
 , cups
 , AppKit
@@ -130,7 +130,7 @@ stdenv.mkDerivation (finalAttrs: {
     libXi
     libXrandr
     libXrender
-  ]) ++ lib.optionals stdenv.isDarwin [
+  ]) ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
   ] ++ lib.optionals trackerSupport [
     tracker
@@ -142,7 +142,7 @@ stdenv.mkDerivation (finalAttrs: {
     xorg.libXinerama
   ] ++ lib.optionals cupsSupport [
     cups
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ] ++ lib.optionals stdenv.hostPlatform.isMusl [
     libexecinfo
@@ -175,13 +175,13 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.mesonEnable "vulkan" vulkanSupport)
     (lib.mesonEnable "print-cups" cupsSupport)
     (lib.mesonBool "x11-backend" x11Support)
-  ] ++ lib.optionals (stdenv.isDarwin && !stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isAarch64) [
     "-Dmedia-gstreamer=disabled" # requires gstreamer-gl
   ];
 
   doCheck = false; # needs X11
 
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   # These are the defines that'd you'd get with --enable-debug=minimum (default).
   # See: https://developer.gnome.org/gtk3/stable/gtk-building.html#extra-configuration-options
@@ -218,7 +218,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   postInstall = ''
     PATH="$OLD_PATH"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # The updater is needed for nixos env and it's tiny.
     moveToOutput bin/gtk4-update-icon-cache "$out"
     # Launcher
@@ -234,7 +234,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   # Wrap demos
-  postFixup =  lib.optionalString (!stdenv.isDarwin) ''
+  postFixup =  lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     demos=(gtk4-demo gtk4-demo-application gtk4-icon-browser gtk4-widget-factory)
 
     for program in ''${demos[@]}; do
diff --git a/pkgs/development/libraries/gtkmm/4.x.nix b/pkgs/development/libraries/gtkmm/4.x.nix
index 36ff98d9f165..64ec9e9ac2c9 100644
--- a/pkgs/development/libraries/gtkmm/4.x.nix
+++ b/pkgs/development/libraries/gtkmm/4.x.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     pangomm_2_48
   ];
 
-  nativeCheckInputs = lib.optionals (!stdenv.isDarwin)[
+  nativeCheckInputs = lib.optionals (!stdenv.hostPlatform.isDarwin)[
     xvfb-run
   ];
 
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
   checkPhase = ''
     runHook preCheck
 
-    ${lib.optionalString (!stdenv.isDarwin) "xvfb-run -s '-screen 0 800x600x24'"} \
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "xvfb-run -s '-screen 0 800x600x24'"} \
       meson test --print-errorlogs
 
     runHook postCheck
diff --git a/pkgs/development/libraries/gtksourceview/3.x.nix b/pkgs/development/libraries/gtksourceview/3.x.nix
index fb5c72e8b34d..41999f553826 100644
--- a/pkgs/development/libraries/gtksourceview/3.x.nix
+++ b/pkgs/development/libraries/gtksourceview/3.x.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
   checkPhase = ''
     NO_AT_BRIDGE=1 \
     XDG_DATA_DIRS="$XDG_DATA_DIRS:${shared-mime-info}/share" \
diff --git a/pkgs/development/libraries/gtksourceview/5.x.nix b/pkgs/development/libraries/gtksourceview/5.x.nix
index f1a12eb0de12..a57881ff5532 100644
--- a/pkgs/development/libraries/gtksourceview/5.x.nix
+++ b/pkgs/development/libraries/gtksourceview/5.x.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # The 10.12 SDK used by x86_64-darwin requires defining `_POSIX_C_SOURCE` to use `strnlen`.
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) "-D_POSIX_C_SOURCE=200809L";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "-D_POSIX_C_SOURCE=200809L";
 
   nativeBuildInputs = [
     meson
@@ -79,7 +79,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Ddocumentation=true"
   ];
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/development/libraries/gupnp/default.nix b/pkgs/development/libraries/gupnp/default.nix
index 08b2925b0ea3..5fa0df314274 100644
--- a/pkgs/development/libraries/gupnp/default.nix
+++ b/pkgs/development/libraries/gupnp/default.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
   ];
 
   # Bail out! ERROR:../tests/test-bugs.c:168:test_on_timeout: code should not be reached
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru = {
     updateScript = gnome.updateScript {
diff --git a/pkgs/development/libraries/gvfs/default.nix b/pkgs/development/libraries/gvfs/default.nix
index 7c5cdca3f619..4b4da283dd89 100644
--- a/pkgs/development/libraries/gvfs/default.nix
+++ b/pkgs/development/libraries/gvfs/default.nix
@@ -8,7 +8,7 @@
 , gettext
 , dbus
 , glib
-, udevSupport ? stdenv.isLinux
+, udevSupport ? stdenv.hostPlatform.isLinux
 , libgudev
 , udisks2
 , libgcrypt
diff --git a/pkgs/development/libraries/harfbuzz/default.nix b/pkgs/development/libraries/harfbuzz/default.nix
index 12297a5da669..15208becc301 100644
--- a/pkgs/development/libraries/harfbuzz/default.nix
+++ b/pkgs/development/libraries/harfbuzz/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   postPatch = ''
     patchShebangs src/*.py test
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # ApplicationServices.framework headers have cast-align warnings.
     substituteInPlace src/hb.hh \
       --replace '#pragma GCC diagnostic error   "-Wcast-align"' ""
@@ -94,7 +94,7 @@ stdenv.mkDerivation (finalAttrs: {
   postFixup = lib.optionalString withIcu ''
     rm "$out"/lib/libharfbuzz.* "$dev/lib/pkgconfig/harfbuzz.pc"
     ln -s {'${harfbuzz.dev}',"$dev"}/lib/pkgconfig/harfbuzz.pc
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       ln -s {'${harfbuzz.out}',"$out"}/lib/libharfbuzz.dylib
       ln -s {'${harfbuzz.out}',"$out"}/lib/libharfbuzz.0.dylib
     ''}
diff --git a/pkgs/development/libraries/hidapi/default.nix b/pkgs/development/libraries/hidapi/default.nix
index 05b915efb8f9..6e537e8b74fb 100644
--- a/pkgs/development/libraries/hidapi/default.nix
+++ b/pkgs/development/libraries/hidapi/default.nix
@@ -23,11 +23,11 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ cmake pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ libusb1 udev ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libusb1 udev ];
 
   enableParallelBuilding = true;
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [ Cocoa IOKit ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa IOKit ];
 
   passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
 
@@ -37,9 +37,9 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ prusnak ];
     # You can choose between GPLv3, BSD or HIDAPI license (even more liberal)
     license = with licenses; [ bsd3 /* or */ gpl3Only ] ;
-    pkgConfigModules = lib.optionals stdenv.isDarwin [
+    pkgConfigModules = lib.optionals stdenv.hostPlatform.isDarwin [
       "hidapi"
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       "hidapi-hidraw"
       "hidapi-libusb"
     ];
diff --git a/pkgs/development/libraries/hivex/default.nix b/pkgs/development/libraries/hivex/default.nix
index d8e320a44c19..c85790408bdd 100644
--- a/pkgs/development/libraries/hivex/default.nix
+++ b/pkgs/development/libraries/hivex/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     libxml2
   ]
   ++ (with perlPackages; [ perl IOStringy ])
-  ++ lib.optionals stdenv.isDarwin [ libintl ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ libintl ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/http-parser/default.nix b/pkgs/development/libraries/http-parser/default.nix
index 6ba2b8fc1ace..69cf2ab210dd 100644
--- a/pkgs/development/libraries/http-parser/default.nix
+++ b/pkgs/development/libraries/http-parser/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./enable-static-shared.patch
-  ] ++ lib.optionals stdenv.isAarch32 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch32 [
     # https://github.com/nodejs/http-parser/pull/510
     (fetchpatch {
       url = "https://github.com/nodejs/http-parser/commit/4f15b7d510dc7c6361a26a7c6d2f7c3a17f8d878.patch";
diff --git a/pkgs/development/libraries/hwloc/default.nix b/pkgs/development/libraries/hwloc/default.nix
index f2316ab657a1..f71fa4aca81f 100644
--- a/pkgs/development/libraries/hwloc/default.nix
+++ b/pkgs/development/libraries/hwloc/default.nix
@@ -27,15 +27,15 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ expat ncurses ]
     ++ lib.optionals x11Support [ cairo libX11 ]
-    ++ lib.optionals stdenv.isLinux [ numactl ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ numactl ]
     ++ lib.optionals enableCuda [ cudaPackages.cuda_cudart ];
 
   # Since `libpci' appears in `hwloc.pc', it must be propagated.
-  propagatedBuildInputs = lib.optional stdenv.isLinux pciutils;
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isLinux pciutils;
 
   enableParallelBuilding = true;
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     if [ -d "${numactl}/lib64" ]; then
       numalibdir="${numactl}/lib64"
     else
diff --git a/pkgs/development/libraries/hyperscan/default.nix b/pkgs/development/libraries/hyperscan/default.nix
index 0b9765dac4cf..cdb578ba08d5 100644
--- a/pkgs/development/libraries/hyperscan/default.nix
+++ b/pkgs/development/libraries/hyperscan/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     "-DBUILD_AVX512=ON"
   ]
-  ++ lib.optional (!stdenv.isDarwin) "-DFAT_RUNTIME=ON"
+  ++ lib.optional (!stdenv.hostPlatform.isDarwin) "-DFAT_RUNTIME=ON"
   ++ lib.optional (withStatic) "-DBUILD_STATIC_AND_SHARED=ON"
   ++ lib.optional (!withStatic) "-DBUILD_SHARED_LIBS=ON";
 
diff --git a/pkgs/development/libraries/icu/make-icu.nix b/pkgs/development/libraries/icu/make-icu.nix
index 575f184c163f..52b083995ec7 100644
--- a/pkgs/development/libraries/icu/make-icu.nix
+++ b/pkgs/development/libraries/icu/make-icu.nix
@@ -31,7 +31,7 @@ let
 
       # $(includedir) is different from $(prefix)/include due to multiple outputs
       sed -i -e 's|^\(CPPFLAGS = .*\) -I\$(prefix)/include|\1 -I$(includedir)|' config/Makefile.inc.in
-    '' + lib.optionalString stdenv.isAarch32 ''
+    '' + lib.optionalString stdenv.hostPlatform.isAarch32 ''
       # From https://archlinuxarm.org/packages/armv7h/icu/files/icudata-stdlibs.patch
       sed -e 's/LDFLAGSICUDT=-nodefaultlibs -nostdlib/LDFLAGSICUDT=/' -i config/mh-linux
     '';
@@ -39,7 +39,7 @@ let
     dontDisableStatic = withStatic;
 
     configureFlags = [ "--disable-debug" ]
-      ++ lib.optional (stdenv.isFreeBSD || stdenv.isDarwin) "--enable-rpath"
+      ++ lib.optional (stdenv.hostPlatform.isFreeBSD || stdenv.hostPlatform.isDarwin) "--enable-rpath"
       ++ lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) "--with-cross-build=${nativeBuildRoot}"
       ++ lib.optional withStatic "--enable-static";
 
@@ -74,7 +74,7 @@ let
     postInstall = lib.optionalString withStatic ''
       mkdir -p $static/lib
       mv -v lib/*.a $static/lib
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       sed -i 's/INSTALL_CMD=.*install/INSTALL_CMD=install/' $out/lib/icu/${version}/pkgdata.inc
     '' + (let
       replacements = [
diff --git a/pkgs/development/libraries/igraph/default.nix b/pkgs/development/libraries/igraph/default.nix
index 63ca16e19d7a..0501fe4ac2d3 100644
--- a/pkgs/development/libraries/igraph/default.nix
+++ b/pkgs/development/libraries/igraph/default.nix
@@ -91,7 +91,7 @@ stdenv.mkDerivation (finalAttrs: {
   postFixup = ''
     substituteInPlace $dev/lib/cmake/igraph/igraph-targets.cmake \
       --replace-fail "_IMPORT_PREFIX \"$out\"" "_IMPORT_PREFIX \"$dev\""
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libblas.dylib ${blas}/lib/libblas.dylib $out/lib/libigraph.dylib
   '';
 
diff --git a/pkgs/development/libraries/ilmbase/default.nix b/pkgs/development/libraries/ilmbase/default.nix
index 219d961f9f96..dc075e43563d 100644
--- a/pkgs/development/libraries/ilmbase/default.nix
+++ b/pkgs/development/libraries/ilmbase/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   # fails 1 out of 1 tests with
   # "lt-ImathTest: testBoxAlgo.cpp:892: void {anonymous}::boxMatrixTransform(): Assertion `b21 == b2' failed"
   # at least on i686. spooky!
-  doCheck = stdenv.isx86_64;
+  doCheck = stdenv.hostPlatform.isx86_64;
 
   preConfigure = ''
     # Need to cd after patches for openexr patches to apply.
diff --git a/pkgs/development/libraries/imgui/default.nix b/pkgs/development/libraries/imgui/default.nix
index 1b33c1c74f2d..315a73171067 100644
--- a/pkgs/development/libraries/imgui/default.nix
+++ b/pkgs/development/libraries/imgui/default.nix
@@ -26,15 +26,15 @@
   IMGUI_BUILD_DX10_BINDING ? false,
   IMGUI_BUILD_DX11_BINDING ? false,
   IMGUI_BUILD_DX12_BINDING ? false,
-  IMGUI_BUILD_GLFW_BINDING ? !stdenv.isDarwin,
+  IMGUI_BUILD_GLFW_BINDING ? !stdenv.hostPlatform.isDarwin,
   IMGUI_BUILD_GLUT_BINDING ? false,
-  IMGUI_BUILD_METAL_BINDING ? stdenv.isDarwin,
+  IMGUI_BUILD_METAL_BINDING ? stdenv.hostPlatform.isDarwin,
   IMGUI_BUILD_OPENGL2_BINDING ? false,
   IMGUI_BUILD_OPENGL3_BINDING ?
     IMGUI_BUILD_SDL2_BINDING || IMGUI_BUILD_GLFW_BINDING || IMGUI_BUILD_GLUT_BINDING,
-  IMGUI_BUILD_OSX_BINDING ? stdenv.isDarwin,
+  IMGUI_BUILD_OSX_BINDING ? stdenv.hostPlatform.isDarwin,
   IMGUI_BUILD_SDL2_BINDING ?
-    !IMGUI_BUILD_GLFW_BINDING && !stdenv.isDarwin,
+    !IMGUI_BUILD_GLFW_BINDING && !stdenv.hostPlatform.isDarwin,
   IMGUI_BUILD_SDL2_RENDERER_BINDING ? IMGUI_BUILD_SDL2_BINDING,
   IMGUI_BUILD_VULKAN_BINDING ? false,
   IMGUI_BUILD_WIN32_BINDING ? false,
diff --git a/pkgs/development/libraries/imlib2/default.nix b/pkgs/development/libraries/imlib2/default.nix
index 6f7a14a61611..cea3f45f9ff6 100644
--- a/pkgs/development/libraries/imlib2/default.nix
+++ b/pkgs/development/libraries/imlib2/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # Do not build amd64 assembly code on Darwin, because it fails to compile
   # with unknow directive errors
-  configureFlags = optional stdenv.isDarwin "--enable-amd64=no"
+  configureFlags = optional stdenv.hostPlatform.isDarwin "--enable-amd64=no"
     ++ optional (!svgSupport) "--without-svg"
     ++ optional (!heifSupport) "--without-heif"
     ++ optional (!x11Support) "--without-x";
diff --git a/pkgs/development/libraries/imtui/default.nix b/pkgs/development/libraries/imtui/default.nix
index a4f477543b89..ac1791126bfd 100644
--- a/pkgs/development/libraries/imtui/default.nix
+++ b/pkgs/development/libraries/imtui/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   buildInputs = lib.optional withEmscripten emscripten
     ++ lib.optional withCurl curl
     ++ lib.optional withNcurses ncurses
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Cocoa;
 
   postPatch = ''
     cp -r ${imgui.src}/* third-party/imgui/imgui
diff --git a/pkgs/development/libraries/inchi/default.nix b/pkgs/development/libraries/inchi/default.nix
index f74cfdec9305..1c8cca6af715 100644
--- a/pkgs/development/libraries/inchi/default.nix
+++ b/pkgs/development/libraries/inchi/default.nix
@@ -24,14 +24,14 @@ in
       sha256 = "1zbygqn0443p0gxwr4kx3m1bkqaj8x9hrpch3s41py7jq08f6x28";
     };
 
-    nativeBuildInputs = [ unzip ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+    nativeBuildInputs = [ unzip ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
     outputs = [ "out" "doc" ];
 
     enableParallelBuilding = true;
 
     preConfigure = ''
       cd ./INCHI_API/libinchi/gcc
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace makefile \
         --replace ",--version-script=libinchi.map" "" \
         --replace "LINUX_Z_RELRO = ,-z,relro" "" \
@@ -56,7 +56,7 @@ in
       runHook postInstall
     '';
 
-    preFixup = lib.optionalString stdenv.isDarwin ''
+    preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
       fixDarwinDylibNames $(find "$out" -name "*.so.*")
     '';
 
diff --git a/pkgs/development/libraries/intel-media-driver/default.nix b/pkgs/development/libraries/intel-media-driver/default.nix
index 5b5cfac9e06b..4803f6ecf360 100644
--- a/pkgs/development/libraries/intel-media-driver/default.nix
+++ b/pkgs/development/libraries/intel-media-driver/default.nix
@@ -8,7 +8,7 @@
 , libpciaccess
 , intel-gmmlib
 , libdrm
-, enableX11 ? stdenv.isLinux
+, enableX11 ? stdenv.hostPlatform.isLinux
 , libX11
   # for passhtru.tests
 , pkgsi686Linux
diff --git a/pkgs/development/libraries/irrlicht/default.nix b/pkgs/development/libraries/irrlicht/default.nix
index fa5d2b3b0c99..6711622a2eb8 100644
--- a/pkgs/development/libraries/irrlicht/default.nix
+++ b/pkgs/development/libraries/irrlicht/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     sed -ie '/sys\/sysctl.h/d' source/Irrlicht/COSOperator.cpp
-  '' + lib.optionalString stdenv.isAarch64 ''
+  '' + lib.optionalString stdenv.hostPlatform.isAarch64 ''
     substituteInPlace source/Irrlicht/Makefile \
       --replace "-DIRRLICHT_EXPORTS=1" "-DIRRLICHT_EXPORTS=1 -DPNG_ARM_NEON_OPT=0"
   '';
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     libGLU libGL libXrandr libX11 libXxf86vm
-  ] ++ lib.optional stdenv.isAarch64 zlib;
+  ] ++ lib.optional stdenv.hostPlatform.isAarch64 zlib;
 
   meta = {
     homepage = "https://irrlicht.sourceforge.io/";
diff --git a/pkgs/development/libraries/isa-l/default.nix b/pkgs/development/libraries/isa-l/default.nix
index 9a112fb1c4d9..6ae04b0b267d 100644
--- a/pkgs/development/libraries/isa-l/default.nix
+++ b/pkgs/development/libraries/isa-l/default.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/intel/isa-l";
     maintainers = with maintainers; [ jbedo ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin && stdenv.isAarch64; # does not build on M1 mac (asm/hwcap.h file not found) maybe needs gcc not clang?
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64; # does not build on M1 mac (asm/hwcap.h file not found) maybe needs gcc not clang?
   };
 }
diff --git a/pkgs/development/libraries/itk/generic.nix b/pkgs/development/libraries/itk/generic.nix
index 808bac76e861..d4ece7d311ec 100644
--- a/pkgs/development/libraries/itk/generic.nix
+++ b/pkgs/development/libraries/itk/generic.nix
@@ -147,7 +147,7 @@ stdenv.mkDerivation {
       libX11
       libuuid
     ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ]
     ++ lib.optionals enablePython [ python ]
     ++ lib.optionals withVtk [ vtk ];
   # Due to ITKVtkGlue=ON and the additional dependencies needed to configure VTK 9
diff --git a/pkgs/development/libraries/jabcode/default.nix b/pkgs/development/libraries/jabcode/default.nix
index 1fc0e6fd0886..d735937b934d 100644
--- a/pkgs/development/libraries/jabcode/default.nix
+++ b/pkgs/development/libraries/jabcode/default.nix
@@ -46,6 +46,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl21;
     maintainers = [ maintainers.xaverdh ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/jabcode.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/jabcode.x86_64-darwin
   };
 }
diff --git a/pkgs/development/libraries/java/jffi/default.nix b/pkgs/development/libraries/java/jffi/default.nix
index dddcfd1fa303..fe5a0c553546 100644
--- a/pkgs/development/libraries/java/jffi/default.nix
+++ b/pkgs/development/libraries/java/jffi/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Java Foreign Function Interface";
     homepage = "https://github.com/jnr/jffi";
     platforms = platforms.unix;
diff --git a/pkgs/development/libraries/jemalloc/default.nix b/pkgs/development/libraries/jemalloc/default.nix
index 7541e6b0c1a3..9d3bfd1d9a64 100644
--- a/pkgs/development/libraries/jemalloc/default.nix
+++ b/pkgs/development/libraries/jemalloc/default.nix
@@ -41,19 +41,19 @@ stdenv.mkDerivation rec {
     # jemalloc is unable to correctly detect transparent hugepage support on
     # ARM (https://github.com/jemalloc/jemalloc/issues/526), and the default
     # kernel ARMv6/7 kernel does not enable it, so we explicitly disable support
-    ++ lib.optionals (stdenv.isAarch32 && lib.versionOlder version "5") [
+    ++ lib.optionals (stdenv.hostPlatform.isAarch32 && lib.versionOlder version "5") [
       "--disable-thp"
       "je_cv_thp=no"
     ]
     # AArch64 has configurable page size up to 64k. The default configuration
     # for jemalloc only supports 4k page sizes.
-    ++ lib.optional stdenv.isAarch64 "--with-lg-page=16"
+    ++ lib.optional stdenv.hostPlatform.isAarch64 "--with-lg-page=16"
     # See https://github.com/jemalloc/jemalloc/issues/1997
     # Using a value of 48 should work on both emulated and native x86_64-darwin.
-    ++ lib.optional (stdenv.isDarwin && stdenv.isx86_64) "--with-lg-vaddr=48"
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "--with-lg-vaddr=48"
   ;
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-error=array-bounds";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-error=array-bounds";
 
   # Tries to link test binaries binaries dynamically and fails
   doCheck = !stdenv.hostPlatform.isStatic;
diff --git a/pkgs/development/libraries/kde-frameworks/kauth/default.nix b/pkgs/development/libraries/kde-frameworks/kauth/default.nix
index 0ad7cfbbb7e1..4e9a2a465214 100644
--- a/pkgs/development/libraries/kde-frameworks/kauth/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kauth/default.nix
@@ -1,7 +1,7 @@
 {
   lib, stdenv, mkDerivation, propagate,
   extra-cmake-modules, kcoreaddons, qttools,
-  enablePolkit ? stdenv.isLinux, polkit-qt
+  enablePolkit ? stdenv.hostPlatform.isLinux, polkit-qt
 }:
 
 mkDerivation {
diff --git a/pkgs/development/libraries/kde-frameworks/kdoctools/default.nix b/pkgs/development/libraries/kde-frameworks/kdoctools/default.nix
index 4b52cd95b710..d40c5a0a95e2 100644
--- a/pkgs/development/libraries/kde-frameworks/kdoctools/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kdoctools/default.nix
@@ -22,7 +22,7 @@ mkDerivation {
   outputs = [ "out" "dev" ];
   patches = [ ./kdoctools-no-find-docbook-xml.patch ]
     # kf.doctools.core: Error: Could not find kdoctools catalogs
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       name = "kdoctools-relocate-datapath.patch";
       url = "https://github.com/msys2/MINGW-packages/raw/0900785a1f4e4146ab9561fb92a1c70fa70fcfc4/mingw-w64-kdoctools-qt5/0001-kdoctools-relocate-datapath.patch";
diff --git a/pkgs/development/libraries/kde-frameworks/kfilemetadata/default.nix b/pkgs/development/libraries/kde-frameworks/kfilemetadata/default.nix
index 1bd1f115c6cb..32d01b261488 100644
--- a/pkgs/development/libraries/kde-frameworks/kfilemetadata/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kfilemetadata/default.nix
@@ -18,7 +18,7 @@
 mkDerivation {
   pname = "kfilemetadata";
   nativeBuildInputs = [ extra-cmake-modules ];
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     attr
   ] ++ [
     ebook_tools
diff --git a/pkgs/development/libraries/kde-frameworks/kinit/default.nix b/pkgs/development/libraries/kde-frameworks/kinit/default.nix
index 1f2620c5664d..fb18cfb287e7 100644
--- a/pkgs/development/libraries/kde-frameworks/kinit/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kinit/default.nix
@@ -21,7 +21,7 @@ mkDerivation {
   CXXFLAGS = [
     ''-DNIXPKGS_KF5_KIOCORE=\"${getLib kio}/lib/libKF5KIOCore.so.5\"''
     ''-DNIXPKGS_KF5_PARTS=\"${getLib kparts}/lib/libKF5Parts.so.5\"''
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     ''-DNIXPKGS_KF5_PLASMA=\"${getLib plasma-framework}/lib/libKF5Plasma.so.5\"''
   ];
   setupHook = writeScript "setup-hook.sh" ''
diff --git a/pkgs/development/libraries/kde-frameworks/kio/default.nix b/pkgs/development/libraries/kde-frameworks/kio/default.nix
index 522c27bf56eb..89f341f9977a 100644
--- a/pkgs/development/libraries/kde-frameworks/kio/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/kio/default.nix
@@ -15,14 +15,14 @@ mkDerivation {
     karchive kconfigwidgets kdbusaddons ki18n kiconthemes knotifications
     ktextwidgets kwallet kwidgetsaddons kwindowsystem qtscript qtx11extras
     kcrash libkrb5
-  ] ++ lib.lists.optionals stdenv.isLinux [
+  ] ++ lib.lists.optionals stdenv.hostPlatform.isLinux [
     acl attr # both are needed for ACL support
     util-linux # provides libmount
   ];
   propagatedBuildInputs = [
     kbookmarks kcompletion kconfig kcoreaddons kitemviews kjobwidgets kservice
     kxmlgui qtbase qttools solid
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     kded
   ];
   outputs = [ "out" "dev" ];
diff --git a/pkgs/development/libraries/kde-frameworks/knotifications.nix b/pkgs/development/libraries/kde-frameworks/knotifications.nix
index 5284d673d89e..d9d5a6f70380 100644
--- a/pkgs/development/libraries/kde-frameworks/knotifications.nix
+++ b/pkgs/development/libraries/kde-frameworks/knotifications.nix
@@ -11,7 +11,7 @@ mkDerivation {
   nativeBuildInputs = [ extra-cmake-modules qttools ];
   buildInputs = [
     kcodecs kconfig kcoreaddons kwindowsystem libdbusmenu phonon qtx11extras
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     qtmacextras
   ];
 }
diff --git a/pkgs/development/libraries/kde-frameworks/ktexteditor.nix b/pkgs/development/libraries/kde-frameworks/ktexteditor.nix
index ccc9f76b237a..23abe70fed05 100644
--- a/pkgs/development/libraries/kde-frameworks/ktexteditor.nix
+++ b/pkgs/development/libraries/kde-frameworks/ktexteditor.nix
@@ -15,7 +15,7 @@ mkDerivation ({
     editorconfig-core-c
   ];
   propagatedBuildInputs = [ kparts ];
-} // lib.optionalAttrs stdenv.isDarwin {
+} // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
   postPatch = ''
     substituteInPlace src/part/CMakeLists.txt \
       --replace "kpart.desktop" "${kparts}/share/kservicetypes5/kpart.desktop"
diff --git a/pkgs/development/libraries/kde-frameworks/solid/default.nix b/pkgs/development/libraries/kde-frameworks/solid/default.nix
index 27160c3bda0d..e26f8bfa9a62 100644
--- a/pkgs/development/libraries/kde-frameworks/solid/default.nix
+++ b/pkgs/development/libraries/kde-frameworks/solid/default.nix
@@ -8,8 +8,8 @@ mkDerivation {
   pname = "solid";
   patches = [ ./fix-search-path.patch ];
   nativeBuildInputs = [ bison extra-cmake-modules flex ]
-    ++ lib.optionals stdenv.isLinux [ media-player-info ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ media-player-info ];
   buildInputs = [ qtdeclarative qttools ];
   propagatedBuildInputs = [ qtbase ];
-  propagatedUserEnvPkgs = lib.optionals stdenv.isLinux [ media-player-info ];
+  propagatedUserEnvPkgs = lib.optionals stdenv.hostPlatform.isLinux [ media-player-info ];
 }
diff --git a/pkgs/development/libraries/kerberos/heimdal.nix b/pkgs/development/libraries/kerberos/heimdal.nix
index 60b3ad00aeda..ab9a107cd47e 100644
--- a/pkgs/development/libraries/kerberos/heimdal.nix
+++ b/pkgs/development/libraries/kerberos/heimdal.nix
@@ -32,10 +32,10 @@
 , nixosTests
 
 , withCJSON ? true
-, withCapNG ? stdenv.isLinux
+, withCapNG ? stdenv.hostPlatform.isLinux
 # libmicrohttpd should theoretically work for darwin as well, but something is broken.
 # It affects tests check-bx509d and check-httpkadmind.
-, withMicroHTTPD ? stdenv.isLinux
+, withMicroHTTPD ? stdenv.hostPlatform.isLinux
 , withOpenLDAP ? true
 , withOpenLDAPAsHDBModule ? false
 , withOpenSSL ? true
@@ -71,7 +71,7 @@ stdenv.mkDerivation {
   ++ (with perlPackages; [ JSON ]);
 
   buildInputs = [ db libedit pam ]
-    ++ lib.optionals (stdenv.isDarwin) [ CoreFoundation Security SystemConfiguration ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ CoreFoundation Security SystemConfiguration ]
     ++ lib.optionals (withCJSON) [ cjson ]
     ++ lib.optionals (withCapNG) [ libcap_ng ]
     ++ lib.optionals (withMicroHTTPD) [ libmicrohttpd ]
@@ -132,7 +132,7 @@ stdenv.mkDerivation {
 
   # (test_cc) heimdal uses librokens implementation of `secure_getenv` on darwin,
   #           which expects either USER or LOGNAME to be set.
-  preCheck = lib.optionalString (stdenv.isDarwin) ''
+  preCheck = lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     export USER=nix-builder
   '';
 
diff --git a/pkgs/development/libraries/kerberos/krb5.nix b/pkgs/development/libraries/kerberos/krb5.nix
index f48a2136ad11..a384d49fed03 100644
--- a/pkgs/development/libraries/kerberos/krb5.nix
+++ b/pkgs/development/libraries/kerberos/krb5.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     # krb5's ./configure does not allow passing --enable-shared and --enable-static at the same time.
     # See https://bbs.archlinux.org/viewtopic.php?pid=1576737#p1576737
     ++ lib.optionals staticOnly [ "--enable-static" "--disable-shared" ]
-    ++ lib.optional stdenv.isFreeBSD ''WARN_CFLAGS=''
+    ++ lib.optional stdenv.hostPlatform.isFreeBSD ''WARN_CFLAGS=''
     ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform)
        [ "krb5_cv_attr_constructor_destructor=yes,yes"
          "ac_cv_func_regcomp=yes"
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ byacc perl pkg-config ]
     # Provides the mig command used by the build scripts
-    ++ lib.optional stdenv.isDarwin bootstrap_cmds;
+    ++ lib.optional stdenv.hostPlatform.isDarwin bootstrap_cmds;
 
   buildInputs = [ openssl ]
     ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.libc != "bionic" && !(stdenv.hostPlatform.useLLVM or false)) [ keyutils ]
@@ -69,7 +69,7 @@ stdenv.mkDerivation rec {
     ++ lib.optionals withLibedit [ libedit ]
     ++ lib.optionals withVerto [ libverto ];
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk; [
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk; [
     libs.xpc
     frameworks.Kerberos
   ]);
diff --git a/pkgs/development/libraries/kyotocabinet/default.nix b/pkgs/development/libraries/kyotocabinet/default.nix
index 5c5ab34bc24c..ebe783ae8beb 100644
--- a/pkgs/development/libraries/kyotocabinet/default.nix
+++ b/pkgs/development/libraries/kyotocabinet/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-TIXXNmaNgpIL/b25KsPWa32xEI8JWBp2ndkWCgLe80k=";
   };
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace kccommon.h \
       --replace tr1/unordered_map unordered_map \
       --replace tr1/unordered_set unordered_set \
diff --git a/pkgs/development/libraries/ldb/default.nix b/pkgs/development/libraries/ldb/default.nix
index 80a3f725f970..65fc10c92a70 100644
--- a/pkgs/development/libraries/ldb/default.nix
+++ b/pkgs/development/libraries/ldb/default.nix
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "LDAP-like embedded database";
     homepage = "https://ldb.samba.org/";
     license = licenses.lgpl3Plus;
diff --git a/pkgs/development/libraries/lemon-graph/default.nix b/pkgs/development/libraries/lemon-graph/default.nix
index ae071a727133..4e96e9f4c93a 100644
--- a/pkgs/development/libraries/lemon-graph/default.nix
+++ b/pkgs/development/libraries/lemon-graph/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   # error: no viable conversion from ...
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   patches = [
     # error: ISO C++17 does not allow 'register' storage class specifier
diff --git a/pkgs/development/libraries/leptonica/default.nix b/pkgs/development/libraries/leptonica/default.nix
index 12cd3f074fcb..41af5b44a967 100644
--- a/pkgs/development/libraries/leptonica/default.nix
+++ b/pkgs/development/libraries/leptonica/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   nativeCheckInputs = [ which gnuplot ];
 
   # Fails on pngio_reg for unknown reason
-  doCheck = false; # !stdenv.isDarwin;
+  doCheck = false; # !stdenv.hostPlatform.isDarwin;
 
   meta = {
     description = "Image processing and analysis library";
diff --git a/pkgs/development/libraries/leveldb/default.nix b/pkgs/development/libraries/leveldb/default.nix
index f5e7e2a638d2..9d2dfe468029 100644
--- a/pkgs/development/libraries/leveldb/default.nix
+++ b/pkgs/development/libraries/leveldb/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ snappy ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames ++ [ cmake ];
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames ++ [ cmake ];
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/lib2geom/default.nix b/pkgs/development/libraries/lib2geom/default.nix
index e0db2b76f19e..eedb433e61be 100644
--- a/pkgs/development/libraries/lib2geom/default.nix
+++ b/pkgs/development/libraries/lib2geom/default.nix
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
   # TODO: Update cmake hook to make it simpler to selectively disable cmake tests: #113829
   checkPhase = let
     disabledTests =
-      lib.optionals stdenv.isAarch64 [
+      lib.optionals stdenv.hostPlatform.isAarch64 [
         # Broken on all platforms, test just accidentally passes on some.
         # https://gitlab.com/inkscape/lib2geom/-/issues/63
         "elliptical-arc-test"
diff --git a/pkgs/development/libraries/lib3mf/default.nix b/pkgs/development/libraries/lib3mf/default.nix
index 2436fbc00287..df88534bc6e7 100644
--- a/pkgs/development/libraries/lib3mf/default.nix
+++ b/pkgs/development/libraries/lib3mf/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     libzip gtest openssl
-  ] ++ (if stdenv.isDarwin then [ libossp_uuid ] else [ libuuid ]);
+  ] ++ (if stdenv.hostPlatform.isDarwin then [ libossp_uuid ] else [ libuuid ]);
 
   postPatch = ''
     # This lets us build the tests properly on aarch64-darwin.
diff --git a/pkgs/development/libraries/libLAS/default.nix b/pkgs/development/libraries/libLAS/default.nix
index b92d9161c1a3..f9bd01306585 100644
--- a/pkgs/development/libraries/libLAS/default.nix
+++ b/pkgs/development/libraries/libLAS/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     "-DCMAKE_EXE_LINKER_FLAGS=-pthread"
   ];
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change "@rpath/liblas.3.dylib" "$out/lib/liblas.3.dylib" $out/lib/liblas_c.dylib
   '';
 
diff --git a/pkgs/development/libraries/libad9361/default.nix b/pkgs/development/libraries/libad9361/default.nix
index f370870f71ef..96f1e877d52b 100644
--- a/pkgs/development/libraries/libad9361/default.nix
+++ b/pkgs/development/libraries/libad9361/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libiio ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix iio include path on darwin to match linux
     for i in test/*.c; do
       substituteInPlace $i \
diff --git a/pkgs/development/libraries/libadwaita/default.nix b/pkgs/development/libraries/libadwaita/default.nix
index 924b8884df80..bd51a9a1245e 100644
--- a/pkgs/development/libraries/libadwaita/default.nix
+++ b/pkgs/development/libraries/libadwaita/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     appstream
     fribidi
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Foundation
   ];
@@ -72,7 +72,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeCheckInputs = [
     adwaita-icon-theme
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     xvfb-run
   ];
 
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
   #
   # not ok /Adwaita/ButtonContent/style_class_button - Gdk-FATAL-CRITICAL:
   # gdk_macos_monitor_get_workarea: assertion 'GDK_IS_MACOS_MONITOR (self)' failed
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   separateDebugInfo = true;
 
   checkPhase = ''
@@ -98,7 +98,7 @@ stdenv.mkDerivation (finalAttrs: {
       # Tests need a cache directory
       "HOME=$TMPDIR"
     )
-    env "''${testEnvironment[@]}" ${lib.optionalString (!stdenv.isDarwin) "xvfb-run"} \
+    env "''${testEnvironment[@]}" ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "xvfb-run"} \
       meson test --print-errorlogs
 
     runHook postCheck
diff --git a/pkgs/development/libraries/libagar/libagar_test.nix b/pkgs/development/libraries/libagar/libagar_test.nix
index 0582019d72f5..8fa18093aa35 100644
--- a/pkgs/development/libraries/libagar/libagar_test.nix
+++ b/pkgs/development/libraries/libagar/libagar_test.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
   buildInputs = [ perl bsdbuild libagar libjpeg libpng openssl ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Tests for libagar";
     mainProgram = "agartest";
     homepage = "http://libagar.org/index.html";
diff --git a/pkgs/development/libraries/libantlr3c/default.nix b/pkgs/development/libraries/libantlr3c/default.nix
index f61c0bfafc7b..622dabd82394 100644
--- a/pkgs/development/libraries/libantlr3c/default.nix
+++ b/pkgs/development/libraries/libantlr3c/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 ="0lpbnb4dq4azmsvlhp6khq1gy42kyqyjv8gww74g5lm2y6blm4fa";
   };
 
-  configureFlags = lib.optional stdenv.is64bit "--enable-64bit"
+  configureFlags = lib.optional stdenv.hostPlatform.is64bit "--enable-64bit"
     # libantlr3c wrongly emits the abi flags -m64 and -m32 which imply x86 archs
     # https://github.com/antlr/antlr3/issues/205
     ++ lib.optional (!stdenv.hostPlatform.isx86) "--disable-abiflags";
diff --git a/pkgs/development/libraries/libao/default.nix b/pkgs/development/libraries/libao/default.nix
index b920fe9c3b4e..6c6743b2b55e 100644
--- a/pkgs/development/libraries/libao/default.nix
+++ b/pkgs/development/libraries/libao/default.nix
@@ -33,8 +33,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ ] ++
     lib.optional  usePulseAudio   libpulseaudio ++
-    lib.optionals stdenv.isLinux  [ alsa-lib libcap ] ++
-    lib.optionals stdenv.isDarwin [ CoreAudio CoreServices AudioUnit ];
+    lib.optionals stdenv.hostPlatform.isLinux  [ alsa-lib libcap ] ++
+    lib.optionals stdenv.hostPlatform.isDarwin [ CoreAudio CoreServices AudioUnit ];
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
diff --git a/pkgs/development/libraries/libaom/default.nix b/pkgs/development/libraries/libaom/default.nix
index 8f4afbf5a3e0..01f361d05476 100644
--- a/pkgs/development/libraries/libaom/default.nix
+++ b/pkgs/development/libraries/libaom/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     "-DCONFIG_TUNE_VMAF=1"
   ] ++ lib.optionals (isCross && !stdenv.hostPlatform.isx86) [
     "-DCMAKE_ASM_COMPILER=${stdenv.cc.targetPrefix}as"
-  ] ++ lib.optionals stdenv.isAarch32 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch32 [
     # armv7l-hf-multiplatform does not support NEON
     # see lib/systems/platform.nix
     "-DENABLE_NEON=0"
diff --git a/pkgs/development/libraries/libaosd/default.nix b/pkgs/development/libraries/libaosd/default.nix
index 540fc10998e5..8068ae3edd9d 100644
--- a/pkgs/development/libraries/libaosd/default.nix
+++ b/pkgs/development/libraries/libaosd/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
       composited rendering via XComposite, as well as support for
       rendering Cairo and Pango layouts.
     '';
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/atheme-legacy/libaosd";
     license = licenses.mit;
     maintainers = with maintainers; [ unode ];
diff --git a/pkgs/development/libraries/libargon2/default.nix b/pkgs/development/libraries/libargon2/default.nix
index 6e2ef83c5eac..ccd8166ca4f0 100644
--- a/pkgs/development/libraries/libargon2/default.nix
+++ b/pkgs/development/libraries/libargon2/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0p4ry9dn0mi9js0byijxdyiwx74p1nr8zj7wjpd1fjgqva4sk23i";
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/development/libraries/libass/default.nix b/pkgs/development/libraries/libass/default.nix
index 3c3fa3ee7066..db5603ac4aea 100644
--- a/pkgs/development/libraries/libass/default.nix
+++ b/pkgs/development/libraries/libass/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ freetype fribidi harfbuzz ]
     ++ lib.optional fontconfigSupport fontconfig
-    ++ lib.optional stdenv.isDarwin [
+    ++ lib.optional stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.ApplicationServices
       darwin.apple_sdk.frameworks.CoreFoundation
diff --git a/pkgs/development/libraries/libasyncns/default.nix b/pkgs/development/libraries/libasyncns/default.nix
index 09e056373d27..77c998f4216b 100644
--- a/pkgs/development/libraries/libasyncns/default.nix
+++ b/pkgs/development/libraries/libasyncns/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0x5b6lcic4cd7q0bx00x93kvpyzl7n2abbgvqbrlzrfb8vknc6jg";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace libasyncns/asyncns.c \
       --replace '<arpa/nameser.h>' '<arpa/nameser_compat.h>'
   '';
diff --git a/pkgs/development/libraries/libatomic_ops/default.nix b/pkgs/development/libraries/libatomic_ops/default.nix
index bf83a9e8456a..a9fc75558e9b 100644
--- a/pkgs/development/libraries/libatomic_ops/default.nix
+++ b/pkgs/development/libraries/libatomic_ops/default.nix
@@ -14,9 +14,9 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "dev" "doc" ];
 
-  nativeBuildInputs = lib.optionals stdenv.isCygwin [ autoconf automake libtool ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isCygwin [ autoconf automake libtool ];
 
-  preConfigure = lib.optionalString stdenv.isCygwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isCygwin ''
     sed -i -e "/libatomic_ops_gpl_la_SOURCES/a libatomic_ops_gpl_la_LIBADD = libatomic_ops.la" src/Makefile.am
     ./autogen.sh
   '';
diff --git a/pkgs/development/libraries/libbacktrace/default.nix b/pkgs/development/libraries/libbacktrace/default.nix
index 1be572671e02..60c7ede0993f 100644
--- a/pkgs/development/libraries/libbacktrace/default.nix
+++ b/pkgs/development/libraries/libbacktrace/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
     (lib.enableFeature enableShared "shared")
   ];
 
-  doCheck = stdenv.isLinux && !stdenv.hostPlatform.isMusl;
+  doCheck = stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isMusl;
 
   passthru = {
     updateScript = unstableGitUpdater { };
diff --git a/pkgs/development/libraries/libbladeRF/default.nix b/pkgs/development/libraries/libbladeRF/default.nix
index 94d1257d0e7d..77e72d22db6c 100644
--- a/pkgs/development/libraries/libbladeRF/default.nix
+++ b/pkgs/development/libraries/libbladeRF/default.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config git doxygen help2man ];
   # ncurses used due to https://github.com/Nuand/bladeRF/blob/ab4fc672c8bab4f8be34e8917d3f241b1d52d0b8/host/utilities/bladeRF-cli/CMakeLists.txt#L208
   buildInputs = [ tecla libusb1 ]
-    ++ lib.optionals stdenv.isLinux [ udev ]
-    ++ lib.optionals stdenv.isDarwin [ ncurses ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ udev ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ ncurses ];
 
   # Fixup shebang
   prePatch = "patchShebangs host/utilities/bladeRF-cli/src/cmd/doc/generate.bash";
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DBUILD_DOCUMENTATION=ON"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DUDEV_RULES_PATH=etc/udev/rules.d"
     "-DINSTALL_UDEV_RULES=ON"
     "-DBLADERF_GROUP=bladerf"
diff --git a/pkgs/development/libraries/libbluray/default.nix b/pkgs/development/libraries/libbluray/default.nix
index 672908281b0e..c31c05920e31 100644
--- a/pkgs/development/libraries/libbluray/default.nix
+++ b/pkgs/development/libraries/libbluray/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ fontconfig ]
     ++ lib.optional withMetadata libxml2
     ++ lib.optional withFonts freetype
-    ++ lib.optional stdenv.isDarwin DiskArbitration;
+    ++ lib.optional stdenv.hostPlatform.isDarwin DiskArbitration;
 
   propagatedBuildInputs = lib.optional withAACS libaacs;
 
diff --git a/pkgs/development/libraries/libbtbb/default.nix b/pkgs/development/libraries/libbtbb/default.nix
index e0e70005e25f..9ea153fab6f6 100644
--- a/pkgs/development/libraries/libbtbb/default.nix
+++ b/pkgs/development/libraries/libbtbb/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "1byv8174xam7siakr1p0523x97wkh0fmwmq341sd3g70qr2g767d";
   };
 
-  nativeBuildInputs = [ cmake ] ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  nativeBuildInputs = [ cmake ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   # https://github.com/greatscottgadgets/libbtbb/issues/63
   postPatch = ''
diff --git a/pkgs/development/libraries/libbutl/default.nix b/pkgs/development/libraries/libbutl/default.nix
index 65fe845ff25a..aaf78cec08dc 100644
--- a/pkgs/development/libraries/libbutl/default.nix
+++ b/pkgs/development/libraries/libbutl/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     build2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     DarwinTools
   ];
 
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   # but especially important when bootstrapping
   disallowedReferences = [ build2 ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace libbutl/uuid-linux.cxx \
       --replace '"libuuid.so' '"${lib.getLib libuuid}/lib/libuuid.so'
   '';
diff --git a/pkgs/development/libraries/libcacard/default.nix b/pkgs/development/libraries/libcacard/default.nix
index 5f987943d8df..1dd07a9d6ec2 100644
--- a/pkgs/development/libraries/libcacard/default.nix
+++ b/pkgs/development/libraries/libcacard/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-+79N6Mt9tb3/XstnL/Db5pOfufNEuQDVG6YpUymjMuc=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i '/--version-script/d' Makefile.in
     sed -i 's/^vflag = .*$/vflag = ""/' meson.build
   '';
diff --git a/pkgs/development/libraries/libcanberra/default.nix b/pkgs/development/libraries/libcanberra/default.nix
index 0a9aabf73123..7f164c18b49c 100644
--- a/pkgs/development/libraries/libcanberra/default.nix
+++ b/pkgs/development/libraries/libcanberra/default.nix
@@ -2,7 +2,7 @@
 , gtk2-x11, gtk3-x11 , gtkSupport ? null
 , libpulseaudio, gst_all_1, libvorbis, libcap, systemd
 , Carbon, CoreServices, AppKit
-, withAlsa ? stdenv.isLinux, alsa-lib }:
+, withAlsa ? stdenv.hostPlatform.isLinux, alsa-lib }:
 
 stdenv.mkDerivation rec {
   pname = "libcanberra";
@@ -23,12 +23,12 @@ stdenv.mkDerivation rec {
   ] ++ (with gst_all_1; [ gstreamer gst-plugins-base ])
     ++ lib.optional (gtkSupport == "gtk2") gtk2-x11
     ++ lib.optional (gtkSupport == "gtk3") gtk3-x11
-    ++ lib.optionals stdenv.isDarwin [ Carbon CoreServices AppKit ]
-    ++ lib.optionals stdenv.isLinux [ libcap systemd ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon CoreServices AppKit ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap systemd ]
     ++ lib.optional withAlsa alsa-lib;
 
   configureFlags = [ "--disable-oss" ]
-    ++ lib.optional stdenv.isLinux "--with-systemdsystemunitdir=${placeholder "out"}/lib/systemd/system";
+    ++ lib.optional stdenv.hostPlatform.isLinux "--with-systemdsystemunitdir=${placeholder "out"}/lib/systemd/system";
 
   patches = [
     (fetchpatch {
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
       url = "http://git.0pointer.net/libcanberra.git/patch/?id=c0620e432650e81062c1967cc669829dbd29b310";
       sha256 = "0rc7zwn39yxzxp37qh329g7375r5ywcqcaak8ryd0dgvg8m5hcx9";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       url = "https://github.com/macports/macports-ports/raw/5a7965dfea7727d1ceedee46c7b0ccee9cb23468/audio/libcanberra/files/patch-configure.diff";
       sha256 = "sha256-pEJy1krciUEg5BFIS8FJ4BubjfS/nt9aqi6BLnS1+4M=";
diff --git a/pkgs/development/libraries/libcdio-paranoia/default.nix b/pkgs/development/libraries/libcdio-paranoia/default.nix
index 5f01756ecac0..93b3cb91ffc9 100644
--- a/pkgs/development/libraries/libcdio-paranoia/default.nix
+++ b/pkgs/development/libraries/libcdio-paranoia/default.nix
@@ -27,15 +27,15 @@ stdenv.mkDerivation rec {
   ];
   buildInputs =
     [ libcdio ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       IOKit
       DiskArbitration
     ];
 
-  propagatedBuildInputs = lib.optional stdenv.isDarwin DiskArbitration;
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isDarwin DiskArbitration;
 
-  configureFlags = lib.optionals stdenv.isDarwin [ "--disable-ld-version-script" ];
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "--disable-ld-version-script" ];
 
   meta = with lib; {
     description = "CD paranoia on top of libcdio";
diff --git a/pkgs/development/libraries/libcdio/default.nix b/pkgs/development/libraries/libcdio/default.nix
index 820ac97a434f..9f0d8689f30e 100644
--- a/pkgs/development/libraries/libcdio/default.nix
+++ b/pkgs/development/libraries/libcdio/default.nix
@@ -31,11 +31,11 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config help2man ];
   buildInputs = [ libcddb libiconv ncurses ]
-    ++ lib.optionals stdenv.isDarwin [ Carbon IOKit ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon IOKit ];
 
   enableParallelBuilding = true;
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Library for OS-independent CD-ROM and CD image access";
diff --git a/pkgs/development/libraries/libcec/default.nix b/pkgs/development/libraries/libcec/default.nix
index 78746cf01254..4116f2a0172a 100644
--- a/pkgs/development/libraries/libcec/default.nix
+++ b/pkgs/development/libraries/libcec/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=1"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DHAVE_LINUX_API=1"
   ];
 
diff --git a/pkgs/development/libraries/libcommuni/default.nix b/pkgs/development/libraries/libcommuni/default.nix
index c33fdcf00f33..93aec103bca0 100644
--- a/pkgs/development/libraries/libcommuni/default.nix
+++ b/pkgs/development/libraries/libcommuni/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   dontUseQmakeConfigure = true;
   configureFlags = [ "-config" "release" ]
     # Build mixes up dylibs/frameworks if one is not explicitly specified.
-    ++ lib.optionals stdenv.isDarwin [ "-config" "qt_framework" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-config" "qt_framework" ];
 
   dontWrapQtApps = true;
 
diff --git a/pkgs/development/libraries/libcouchbase/default.nix b/pkgs/development/libraries/libcouchbase/default.nix
index 4f813d74a897..f3decde56c77 100644
--- a/pkgs/development/libraries/libcouchbase/default.nix
+++ b/pkgs/development/libraries/libcouchbase/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   # Running tests in parallel does not work
   enableParallelChecking = false;
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "C client library for Couchbase";
diff --git a/pkgs/development/libraries/libdazzle/default.nix b/pkgs/development/libraries/libdazzle/default.nix
index c94707903872..08b286c825cf 100644
--- a/pkgs/development/libraries/libdazzle/default.nix
+++ b/pkgs/development/libraries/libdazzle/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     docbook_xml_dtd_43
     dbus
     glib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xvfb-run
   ] ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
     mesonEmulatorHook
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     "-Denable_gtk_doc=true"
   ];
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   checkPhase = ''
     xvfb-run -s '-screen 0 800x600x24' dbus-run-session \
diff --git a/pkgs/development/libraries/libdc1394/default.nix b/pkgs/development/libraries/libdc1394/default.nix
index 0163eb9015d2..fc33817a857e 100644
--- a/pkgs/development/libraries/libdc1394/default.nix
+++ b/pkgs/development/libraries/libdc1394/default.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ libusb1 ]
-    ++ lib.optional stdenv.isLinux libraw1394
-    ++ lib.optional stdenv.isDarwin CoreServices;
+    ++ lib.optional stdenv.hostPlatform.isLinux libraw1394
+    ++ lib.optional stdenv.hostPlatform.isDarwin CoreServices;
 
   meta = with lib; {
     description = "Capture and control API for IIDC compliant cameras";
diff --git a/pkgs/development/libraries/libdevil/default.nix b/pkgs/development/libraries/libdevil/default.nix
index bfefe90487c4..53944f5a5e94 100644
--- a/pkgs/development/libraries/libdevil/default.nix
+++ b/pkgs/development/libraries/libdevil/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [ libjpeg libpng libmng lcms1 libtiff openexr ]
     ++ lib.optionals withXorg [ libX11 libGL ]
-    ++ lib.optionals stdenv.isDarwin [ OpenGL ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ OpenGL ];
 
   configureFlags = [ "--enable-ILU" "--enable-ILUT" ];
 
diff --git a/pkgs/development/libraries/libdiscid/default.nix b/pkgs/development/libraries/libdiscid/default.nix
index 926973bb5739..2c4e7de008b6 100644
--- a/pkgs/development/libraries/libdiscid/default.nix
+++ b/pkgs/development/libraries/libdiscid/default.nix
@@ -6,14 +6,14 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
 
   src = fetchurl {
     url = "http://ftp.musicbrainz.org/pub/musicbrainz/${pname}/${pname}-${version}.tar.gz";
     sha256 = "sha256-3V6PHJrq1ELiO3SanMkzY3LmLoitcHmitiiVsDkMsoI=";
   };
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework CoreFoundation -framework IOKit";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework CoreFoundation -framework IOKit";
 
   meta = with lib; {
     description = "C library for creating MusicBrainz DiscIDs from audio CDs";
diff --git a/pkgs/development/libraries/libdv/default.nix b/pkgs/development/libraries/libdv/default.nix
index 49c2ab1bdfa7..da69eedb2887 100644
--- a/pkgs/development/libraries/libdv/default.nix
+++ b/pkgs/development/libraries/libdv/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   # Disable priority scheduling on Darwin because it doesn’t support sched_setscheduler.
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace encodedv/dvconnect.c \
       --replace '#ifdef _SC_PRIORITY_SCHEDULING' '#if 0'
   '';
diff --git a/pkgs/development/libraries/libdvdcss/default.nix b/pkgs/development/libraries/libdvdcss/default.nix
index 6c832250fc1c..2e1cc41c5a73 100644
--- a/pkgs/development/libraries/libdvdcss/default.nix
+++ b/pkgs/development/libraries/libdvdcss/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   pname = "libdvdcss";
   version = "1.4.3";
 
-  buildInputs = lib.optional stdenv.isDarwin IOKit;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin IOKit;
 
   src = fetchurl {
     url = "http://get.videolan.org/libdvdcss/${version}/${pname}-${version}.tar.bz2";
diff --git a/pkgs/development/libraries/libdwg/default.nix b/pkgs/development/libraries/libdwg/default.nix
index 969b5d9636f2..741d848c47a8 100644
--- a/pkgs/development/libraries/libdwg/default.nix
+++ b/pkgs/development/libraries/libdwg/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in "$out"/bin/*; do
       if isELF "$f"; then
         patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$f"
diff --git a/pkgs/development/libraries/libepoxy/default.nix b/pkgs/development/libraries/libepoxy/default.nix
index f771ad140b55..5ff8055cedee 100644
--- a/pkgs/development/libraries/libepoxy/default.nix
+++ b/pkgs/development/libraries/libepoxy/default.nix
@@ -10,7 +10,7 @@
 , libX11
 , Carbon
 , OpenGL
-, x11Support ? !stdenv.isDarwin
+, x11Support ? !stdenv.hostPlatform.isDarwin
 , testers
 }:
 
@@ -30,15 +30,15 @@ stdenv.mkDerivation (finalAttrs: {
   postPatch = ''
     patchShebangs src/*.py
   ''
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/dispatch_common.h --replace "PLATFORM_HAS_GLX 0" "PLATFORM_HAS_GLX 1"
   ''
   # cgl_core and cgl_epoxy_api fail in darwin sandbox and on Hydra (because it's headless?)
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace test/meson.build \
       --replace "[ 'cgl_epoxy_api', [ 'cgl_epoxy_api.c' ] ]," ""
   ''
-  + lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+  + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
     substituteInPlace test/meson.build \
       --replace "[ 'cgl_core', [ 'cgl_core.c' ] ]," ""
   '';
@@ -47,23 +47,23 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ meson ninja pkg-config utilmacros python3 ];
 
-  buildInputs = lib.optionals (x11Support && !stdenv.isDarwin) [
+  buildInputs = lib.optionals (x11Support && !stdenv.hostPlatform.isDarwin) [
     libGL
   ] ++ lib.optionals x11Support [
     libX11
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
     OpenGL
   ];
 
   mesonFlags = [
-    "-Degl=${if (x11Support && !stdenv.isDarwin) then "yes" else "no"}"
+    "-Degl=${if (x11Support && !stdenv.hostPlatform.isDarwin) then "yes" else "no"}"
     "-Dglx=${if x11Support then "yes" else "no"}"
     "-Dtests=${lib.boolToString finalAttrs.finalPackage.doCheck}"
     "-Dx11=${lib.boolToString x11Support}"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (x11Support && !stdenv.isDarwin) ''-DLIBGL_PATH="${lib.getLib libGL}/lib"'';
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (x11Support && !stdenv.hostPlatform.isDarwin) ''-DLIBGL_PATH="${lib.getLib libGL}/lib"'';
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/libevent/default.nix b/pkgs/development/libraries/libevent/default.nix
index 167371e287c0..ab443dfac80d 100644
--- a/pkgs/development/libraries/libevent/default.nix
+++ b/pkgs/development/libraries/libevent/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   buildInputs = lib.optional sslSupport openssl
-    ++ lib.optional stdenv.isCygwin findutils;
+    ++ lib.optional stdenv.hostPlatform.isCygwin findutils;
 
   doCheck = false; # needs the net
 
diff --git a/pkgs/development/libraries/libewf/default.nix b/pkgs/development/libraries/libewf/default.nix
index 6c149b0186ee..3bfd958bfd60 100644
--- a/pkgs/development/libraries/libewf/default.nix
+++ b/pkgs/development/libraries/libewf/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ zlib openssl libuuid ]
-    ++ lib.optionals stdenv.isDarwin [ bzip2 ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ bzip2 ];
 
   # cannot run test program while cross compiling
   configureFlags = lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
diff --git a/pkgs/development/libraries/libextractor/default.nix b/pkgs/development/libraries/libextractor/default.nix
index d947534cb2ec..e154eebc48c1 100644
--- a/pkgs/development/libraries/libextractor/default.nix
+++ b/pkgs/development/libraries/libextractor/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, fetchpatch2, substituteAll
 , libtool, gettext, zlib, bzip2, flac, libvorbis
 , exiv2, libgsf, pkg-config
-, rpmSupport ? stdenv.isLinux, rpm
+, rpmSupport ? stdenv.hostPlatform.isLinux, rpm
 , gstreamerSupport ? true, gst_all_1
 # ^ Needed e.g. for proper id3 and FLAC support.
 #   Set to `false` to decrease package closure size by about 87 MB (53%).
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
   # Checks need to be run after "make install", otherwise plug-ins are not in
   # the search path, etc.
   doCheck = false;
-  doInstallCheck = !stdenv.isDarwin;
+  doInstallCheck = !stdenv.hostPlatform.isDarwin;
   installCheckPhase = "make check";
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/libfabric/default.nix b/pkgs/development/libraries/libfabric/default.nix
index 658e380d210b..6fabadf5f129 100644
--- a/pkgs/development/libraries/libfabric/default.nix
+++ b/pkgs/development/libraries/libfabric/default.nix
@@ -3,9 +3,9 @@
 , fetchFromGitHub
 , pkg-config
 , autoreconfHook
-, enablePsm2 ? (stdenv.isx86_64 && stdenv.isLinux)
+, enablePsm2 ? (stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isLinux)
 , libpsm2
-, enableOpx ? (stdenv.isx86_64 && stdenv.isLinux)
+, enableOpx ? (stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isLinux)
 , libuuid
 , numactl
 }:
diff --git a/pkgs/development/libraries/libff/default.nix b/pkgs/development/libraries/libff/default.nix
index af2191fb4136..527733750079 100644
--- a/pkgs/development/libraries/libff/default.nix
+++ b/pkgs/development/libraries/libff/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   };
 
   cmakeFlags = [ "-DWITH_PROCPS=Off" ]
-    ++ lib.optionals stdenv.isAarch64 [ "-DCURVE=ALT_BN128" "-DUSE_ASM=OFF" ];
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [ "-DCURVE=ALT_BN128" "-DUSE_ASM=OFF" ];
 
   postPatch = lib.optionalString (!enableStatic) ''
     substituteInPlace libff/CMakeLists.txt --replace "STATIC" "SHARED"
diff --git a/pkgs/development/libraries/libffi/3.3.nix b/pkgs/development/libraries/libffi/3.3.nix
index 50bec9edd050..d8dd3fa47d5c 100644
--- a/pkgs/development/libraries/libffi/3.3.nix
+++ b/pkgs/development/libraries/libffi/3.3.nix
@@ -63,6 +63,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ armeenm ];
     platforms = platforms.all;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/libraries/libfido2/default.nix b/pkgs/development/libraries/libfido2/default.nix
index 04bfadeef979..1a68b5eb6eb1 100644
--- a/pkgs/development/libraries/libfido2/default.nix
+++ b/pkgs/development/libraries/libfido2/default.nix
@@ -25,9 +25,9 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
 
   buildInputs = [ libcbor zlib ]
-    ++ lib.optionals stdenv.isDarwin [ hidapi ]
-    ++ lib.optionals stdenv.isLinux [ udev ]
-    ++ lib.optionals (stdenv.isLinux && withPcsclite) [ pcsclite ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ hidapi ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ udev ]
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && withPcsclite) [ pcsclite ];
 
   propagatedBuildInputs = [ openssl ];
 
@@ -36,11 +36,11 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DUDEV_RULES_DIR=${placeholder "out"}/etc/udev/rules.d"
     "-DCMAKE_INSTALL_LIBDIR=lib"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DUSE_HIDAPI=1"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DNFC_LINUX=1"
-  ] ++ lib.optionals (stdenv.isLinux && withPcsclite) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && withPcsclite) [
     "-DUSE_PCSC=1"
   ];
 
diff --git a/pkgs/development/libraries/libfilezilla/default.nix b/pkgs/development/libraries/libfilezilla/default.nix
index 4076e5325c93..bbbcb81797af 100644
--- a/pkgs/development/libraries/libfilezilla/default.nix
+++ b/pkgs/development/libraries/libfilezilla/default.nix
@@ -22,9 +22,9 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
   buildInputs = [ gettext gnutls nettle libxcrypt ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ApplicationServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ApplicationServices ];
 
-  preBuild = lib.optionalString (stdenv.isDarwin) ''
+  preBuild = lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     export MACOSX_DEPLOYMENT_TARGET=11.0
   '';
 
diff --git a/pkgs/development/libraries/libfive/default.nix b/pkgs/development/libraries/libfive/default.nix
index c7915ae676ef..490f695fc101 100644
--- a/pkgs/development/libraries/libfive/default.nix
+++ b/pkgs/development/libraries/libfive/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ wrapQtAppsHook cmake ninja pkg-config python.pkgs.pythonImportsCheckHook ];
   buildInputs = [ eigen zlib libpng boost guile python qtbase ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk_11_0.frameworks.Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk_11_0.frameworks.Cocoa ];
 
   preConfigure = ''
     substituteInPlace studio/src/guile/interpreter.cpp \
@@ -57,7 +57,7 @@ stdenv.mkDerivation {
 
   cmakeFlags = [
     "-DGUILE_CCACHE_DIR=${placeholder "out"}/${guile.siteCcacheDir}"
-  ] ++ lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") [
     # warning: 'aligned_alloc' is only available on macOS 10.15 or newer
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.15"
   ];
@@ -66,7 +66,7 @@ stdenv.mkDerivation {
     NIX_CFLAGS_COMPILE = "-Wno-error=enum-constexpr-conversion";
   };
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # No rules to install the mac app, so do it manually.
     mkdir -p $out/Applications
     cp -r studio/Studio.app $out/Applications/Studio.app
diff --git a/pkgs/development/libraries/libfixposix/default.nix b/pkgs/development/libraries/libfixposix/default.nix
index 3d451de582a5..3eb1dceffdef 100644
--- a/pkgs/development/libraries/libfixposix/default.nix
+++ b/pkgs/development/libraries/libfixposix/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-5qA6ytbqE+/05XQGxP9/4vEs9gFcuI3k7eJJYucW7fM=";
   };
 
-  nativeBuildInputs = [ autoreconfHook pkg-config ] ++ lib.optionals stdenv.isDarwin [ getconf ];
+  nativeBuildInputs = [ autoreconfHook pkg-config ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ getconf ];
 
   meta = with lib; {
     homepage = "https://github.com/sionescu/libfixposix";
diff --git a/pkgs/development/libraries/libfm/default.nix b/pkgs/development/libraries/libfm/default.nix
index 64928de4d4fe..ff08294bdb29 100644
--- a/pkgs/development/libraries/libfm/default.nix
+++ b/pkgs/development/libraries/libfm/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://blog.lxde.org/category/pcmanfm/";
     license = licenses.lgpl21Plus;
     description = "Glib-based library for file management";
diff --git a/pkgs/development/libraries/libfpx/default.nix b/pkgs/development/libraries/libfpx/default.nix
index 6f79ec1b9465..82785a4d0fb8 100644
--- a/pkgs/development/libraries/libfpx/default.nix
+++ b/pkgs/development/libraries/libfpx/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   # Darwin gets misdetected as Windows without this
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-D__unix";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-D__unix";
 
   patches = [
     (fetchpatch {
diff --git a/pkgs/development/libraries/libfreeaptx/default.nix b/pkgs/development/libraries/libfreeaptx/default.nix
index cfc120244521..7a59cde8433e 100644
--- a/pkgs/development/libraries/libfreeaptx/default.nix
+++ b/pkgs/development/libraries/libfreeaptx/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "dev" ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace '-soname' '-install_name' \
       --replace 'lib$(NAME).so' 'lib$(NAME).dylib'
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libfreeaptx.dylib.0 $out/lib/libfreeaptx.dylib.0 $out/bin/freeaptxdec
     install_name_tool -change libfreeaptx.dylib.0 $out/lib/libfreeaptx.dylib.0 $out/bin/freeaptxenc
     install_name_tool -id $out/lib/libfreeaptx.dylib $out/lib/libfreeaptx.dylib
diff --git a/pkgs/development/libraries/libfreefare/default.nix b/pkgs/development/libraries/libfreefare/default.nix
index b05ea5bbe2d5..90e6f29c9d6e 100644
--- a/pkgs/development/libraries/libfreefare/default.nix
+++ b/pkgs/development/libraries/libfreefare/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = [ libnfc openssl ] ++ lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+  buildInputs = [ libnfc openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   meta = with lib; {
     description = "Libfreefare project aims to provide a convenient API for MIFARE card manipulations";
diff --git a/pkgs/development/libraries/libftdi/default.nix b/pkgs/development/libraries/libftdi/default.nix
index 27b23f9d54bc..18dab4e340da 100644
--- a/pkgs/development/libraries/libftdi/default.nix
+++ b/pkgs/development/libraries/libftdi/default.nix
@@ -16,11 +16,11 @@ stdenv.mkDerivation rec {
     sha256 = "13l39f6k6gff30hsgh0wa2z422g9pyl91rh8a8zz6f34k2sxaxii";
   };
 
-  buildInputs = [ libusb-compat-0_1 ] ++ lib.optionals stdenv.isDarwin [ libobjc Security IOKit ];
+  buildInputs = [ libusb-compat-0_1 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc Security IOKit ];
 
   propagatedBuildInputs = [ libusb-compat-0_1 ];
 
-  configureFlags = lib.optional (!stdenv.isDarwin) "--with-async-mode";
+  configureFlags = lib.optional (!stdenv.hostPlatform.isDarwin) "--with-async-mode";
 
   # allow async mode. from ubuntu. see:
   #   https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/libftdi/trusty/view/head:/debian/patches/04_async_mode.diff
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in "$out"/bin/*; do
       if isELF "$f"; then
         patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$f"
diff --git a/pkgs/development/libraries/libgcrypt/1.8.nix b/pkgs/development/libraries/libgcrypt/1.8.nix
index 2f0f3b4fd019..720c376d0263 100644
--- a/pkgs/development/libraries/libgcrypt/1.8.nix
+++ b/pkgs/development/libraries/libgcrypt/1.8.nix
@@ -10,7 +10,7 @@
 , rsyslog
 }:
 
-assert enableCapabilities -> stdenv.isLinux;
+assert enableCapabilities -> stdenv.hostPlatform.isLinux;
 
 stdenv.mkDerivation rec {
   pname = "libgcrypt";
diff --git a/pkgs/development/libraries/libgcrypt/default.nix b/pkgs/development/libraries/libgcrypt/default.nix
index ffe9f42326f8..ad360dab55ca 100644
--- a/pkgs/development/libraries/libgcrypt/default.nix
+++ b/pkgs/development/libraries/libgcrypt/default.nix
@@ -11,7 +11,7 @@
 , rsyslog
 }:
 
-assert enableCapabilities -> stdenv.isLinux;
+assert enableCapabilities -> stdenv.hostPlatform.isLinux;
 
 stdenv.mkDerivation rec {
   pname = "libgcrypt";
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
   buildInputs = [ libgpg-error ]
-    ++ lib.optional stdenv.isDarwin gettext
+    ++ lib.optional stdenv.hostPlatform.isDarwin gettext
     ++ lib.optional enableCapabilities libcap;
 
   strictDeps = true;
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
 
   # TODO: figure out why this is even necessary and why the missing dylib only crashes
   # random instead of every test
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $lib/lib
     cp src/.libs/libgcrypt.20.dylib $lib/lib
   '';
diff --git a/pkgs/development/libraries/libgda/default.nix b/pkgs/development/libraries/libgda/default.nix
index a8af4d9b4874..b6a64c4b7a3f 100644
--- a/pkgs/development/libraries/libgda/default.nix
+++ b/pkgs/development/libraries/libgda/default.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation rec {
     # as mentioned in https://github.com/GNOME/libgda/blob/95eeca4b0470f347c645a27f714c62aa6e59f820/libgda/sqlite/README#L31,
     # which references the paper https://web.archive.org/web/20100610151539/http://lattice.umiacs.umd.edu/files/functions_tr.pdf
     # See also https://github.com/Homebrew/homebrew-core/blob/104f9ecd02854a82372b64d63d41356555378a52/Formula/libgda.rb
-    "--enable-system-sqlite=${if stdenv.isDarwin then "no" else "yes"}"
+    "--enable-system-sqlite=${if stdenv.hostPlatform.isDarwin then "no" else "yes"}"
   ];
 
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=incompatible-function-pointer-types";
diff --git a/pkgs/development/libraries/libgdiplus/default.nix b/pkgs/development/libraries/libgdiplus/default.nix
index 4d315b042ee9..63efe5430537 100644
--- a/pkgs/development/libraries/libgdiplus/default.nix
+++ b/pkgs/development/libraries/libgdiplus/default.nix
@@ -34,9 +34,9 @@ stdenv.mkDerivation (finalAttrs: {
     [ glib cairo fontconfig libtiff giflib
       libjpeg libpng libXrender libexif
     ]
-    ++ lib.optional stdenv.isDarwin Carbon;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Carbon;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/lib/libgdiplus.0.dylib $out/lib/libgdiplus.so
   '';
 
diff --git a/pkgs/development/libraries/libgit2/default.nix b/pkgs/development/libraries/libgit2/default.nix
index e110ceb67aa8..af0ae5f73a7d 100644
--- a/pkgs/development/libraries/libgit2/default.nix
+++ b/pkgs/development/libraries/libgit2/default.nix
@@ -49,9 +49,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [ zlib libssh2 openssl pcre llhttp ]
     ++ lib.optional withGssapi krb5
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
-  propagatedBuildInputs = lib.optional (!stdenv.isLinux) libiconv;
+  propagatedBuildInputs = lib.optional (!stdenv.hostPlatform.isLinux) libiconv;
 
   doCheck = true;
   checkPhase = ''
diff --git a/pkgs/development/libraries/libglvnd/default.nix b/pkgs/development/libraries/libglvnd/default.nix
index d3e85c012cf1..c3667d664707 100644
--- a/pkgs/development/libraries/libglvnd/default.nix
+++ b/pkgs/development/libraries/libglvnd/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config python3 addDriverRunpath ];
   buildInputs = [ libX11 libXext xorgproto ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/GLX/Makefile.am \
       --replace "-Wl,-Bsymbolic " ""
     substituteInPlace src/EGL/Makefile.am \
diff --git a/pkgs/development/libraries/libgourou/default.nix b/pkgs/development/libraries/libgourou/default.nix
index bfd483e5d31c..ba64735f873d 100644
--- a/pkgs/development/libraries/libgourou/default.nix
+++ b/pkgs/development/libraries/libgourou/default.nix
@@ -51,6 +51,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl3Plus;
     maintainers = with maintainers; [ autumnal ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/libgpg-error/default.nix b/pkgs/development/libraries/libgpg-error/default.nix
index 9920a54e0413..2dee6c721bc1 100644
--- a/pkgs/development/libraries/libgpg-error/default.nix
+++ b/pkgs/development/libraries/libgpg-error/default.nix
@@ -55,7 +55,7 @@ in stdenv.mkDerivation (rec {
     #   ./config.status[1401]: shift: (null): bad number
     # (See <https://hydra.nixos.org/build/2931046/nixlog/1/raw>.)
     # Thus, re-run it with Bash.
-    lib.optionalString stdenv.isSunOS ''
+    lib.optionalString stdenv.hostPlatform.isSunOS ''
       ${stdenv.shell} config.status
     ''
     # ./configure errorneous decides to use weak symbols on pkgsStatic,
diff --git a/pkgs/development/libraries/libgrss/default.nix b/pkgs/development/libraries/libgrss/default.nix
index ce0c6e14edc2..c6de97101be8 100644
--- a/pkgs/development/libraries/libgrss/default.nix
+++ b/pkgs/development/libraries/libgrss/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     glib
     libxml2
     libsoup
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
     AppKit
   ];
diff --git a/pkgs/development/libraries/libgweather/default.nix b/pkgs/development/libraries/libgweather/default.nix
index 42b927211543..b07051358be0 100644
--- a/pkgs/development/libraries/libgweather/default.nix
+++ b/pkgs/development/libraries/libgweather/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
   mesonFlags = [
     "-Dzoneinfo_dir=${tzdata}/share/zoneinfo"
     (lib.mesonBool "introspection" withIntrospection)
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-Dc_args=-D_DARWIN_C_SOURCE"
   ];
 
diff --git a/pkgs/development/libraries/libhandy/0.x.nix b/pkgs/development/libraries/libhandy/0.x.nix
index d25335c89157..c20a8382b5d0 100644
--- a/pkgs/development/libraries/libhandy/0.x.nix
+++ b/pkgs/development/libraries/libhandy/0.x.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     "-Dintrospection=enabled"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     NO_AT_BRIDGE=1 \
diff --git a/pkgs/development/libraries/libhandy/default.nix b/pkgs/development/libraries/libhandy/default.nix
index a43ee0986be8..829de78a6aeb 100644
--- a/pkgs/development/libraries/libhandy/default.nix
+++ b/pkgs/development/libraries/libhandy/default.nix
@@ -81,7 +81,7 @@ stdenv.mkDerivation rec {
   PKG_CONFIG_GLADEUI_2_0_MODULEDIR = "${placeholder "glade"}/lib/glade/modules";
   PKG_CONFIG_GLADEUI_2_0_CATALOGDIR = "${placeholder "glade"}/share/glade/catalogs";
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/development/libraries/libhv/default.nix b/pkgs/development/libraries/libhv/default.nix
index c64c8e6e291f..93524afabe49 100644
--- a/pkgs/development/libraries/libhv/default.nix
+++ b/pkgs/development/libraries/libhv/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = [ curl openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ curl openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   cmakeFlags = [
     "-DENABLE_UDS=ON"
diff --git a/pkgs/development/libraries/libical/default.nix b/pkgs/development/libraries/libical/default.nix
index 9d5db75bb121..f6a0555f3412 100644
--- a/pkgs/development/libraries/libical/default.nix
+++ b/pkgs/development/libraries/libical/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     # https://github.com/NixOS/nixpkgs/pull/67204
     # previously with https://github.com/NixOS/nixpkgs/pull/61657#issuecomment-495579489
     # gtk-doc docbook_xsl docbook_xml_dtd_43 # for docs
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
   nativeInstallCheckInputs = [
@@ -95,7 +95,7 @@ stdenv.mkDerivation rec {
   # Musl does not support TZDIR.
   doInstallCheck = !stdenv.hostPlatform.isMusl;
   enableParallelChecking = false;
-  preInstallCheck = if stdenv.isDarwin then ''
+  preInstallCheck = if stdenv.hostPlatform.isDarwin then ''
     for testexe in $(find ./src/test -maxdepth 1 -type f -executable); do
       for lib in $(cd lib && ls *.3.dylib); do
         install_name_tool -change $lib $out/lib/$lib $testexe
diff --git a/pkgs/development/libraries/libiconv/default.nix b/pkgs/development/libraries/libiconv/default.nix
index b59887381f49..9bb60501a065 100644
--- a/pkgs/development/libraries/libiconv/default.nix
+++ b/pkgs/development/libraries/libiconv/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
   configureFlags = [
     (lib.enableFeature enableStatic "static")
     (lib.enableFeature enableShared "shared")
-  ] ++ lib.optional stdenv.isFreeBSD "--with-pic";
+  ] ++ lib.optional stdenv.hostPlatform.isFreeBSD "--with-pic";
 
   passthru = { inherit setupHooks; };
 
diff --git a/pkgs/development/libraries/libidn/default.nix b/pkgs/development/libraries/libidn/default.nix
index 916d6d0ad687..bafb2fff272f 100644
--- a/pkgs/development/libraries/libidn/default.nix
+++ b/pkgs/development/libraries/libidn/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   hardeningDisable = [ "format" ];
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
 
diff --git a/pkgs/development/libraries/libidn2/default.nix b/pkgs/development/libraries/libidn2/default.nix
index bfe9c2a24264..90c7198757c7 100644
--- a/pkgs/development/libraries/libidn2/default.nix
+++ b/pkgs/development/libraries/libidn2/default.nix
@@ -22,8 +22,8 @@ stdenv.mkDerivation rec {
 
   # The above patch causes the documentation to be regenerated, so the
   # documentation tools are required.
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ help2man texinfo ];
-  buildInputs = [ libunistring ] ++ lib.optional stdenv.isDarwin libiconv;
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ help2man texinfo ];
+  buildInputs = [ libunistring ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
   meta = {
diff --git a/pkgs/development/libraries/libiio/default.nix b/pkgs/development/libraries/libiio/default.nix
index 8adc01512040..023dfce86bf5 100644
--- a/pkgs/development/libraries/libiio/default.nix
+++ b/pkgs/development/libraries/libiio/default.nix
@@ -46,8 +46,8 @@ stdenv.mkDerivation rec {
     libxml2
     libusb1
   ] ++ lib.optional avahiSupport avahi
-    ++ lib.optional stdenv.isLinux libaio
-    ++ lib.optionals stdenv.isDarwin [ CFNetwork CoreServices ];
+    ++ lib.optional stdenv.hostPlatform.isLinux libaio
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CFNetwork CoreServices ];
 
   cmakeFlags = [
     "-DUDEV_RULES_INSTALL_DIR=${placeholder "out"}/lib/udev/rules.d"
diff --git a/pkgs/development/libraries/libimobiledevice/default.nix b/pkgs/development/libraries/libimobiledevice/default.nix
index 0e81f32bebf8..88b9391d4bdb 100644
--- a/pkgs/development/libraries/libimobiledevice/default.nix
+++ b/pkgs/development/libraries/libimobiledevice/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     libtasn1
     libusbmuxd
     libimobiledevice-glue
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     SystemConfiguration
     CoreFoundation
   ];
diff --git a/pkgs/development/libraries/libiodbc/default.nix b/pkgs/development/libraries/libiodbc/default.nix
index 6d6d7d46576d..c059d619ccae 100644
--- a/pkgs/development/libraries/libiodbc/default.nix
+++ b/pkgs/development/libraries/libiodbc/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = lib.optionals useGTK [ gtk2 ]
-                ++ lib.optional stdenv.isDarwin Carbon;
+                ++ lib.optional stdenv.hostPlatform.isDarwin Carbon;
 
   preBuild =
     ''
diff --git a/pkgs/development/libraries/libipt/default.nix b/pkgs/development/libraries/libipt/default.nix
index 61ec0ce67d88..060f6a803566 100644
--- a/pkgs/development/libraries/libipt/default.nix
+++ b/pkgs/development/libraries/libipt/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optional stdenv.isFreeBSD freebsd.libstdthreads;
+  buildInputs = lib.optional stdenv.hostPlatform.isFreeBSD freebsd.libstdthreads;
 
   meta = with lib; {
     description = "Intel Processor Trace decoder library";
diff --git a/pkgs/development/libraries/libiptcdata/default.nix b/pkgs/development/libraries/libiptcdata/default.nix
index f6f918c1d522..741c8d8a74a5 100644
--- a/pkgs/development/libraries/libiptcdata/default.nix
+++ b/pkgs/development/libraries/libiptcdata/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     autoreconfHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     libintl
   ];
diff --git a/pkgs/development/libraries/libiscsi/default.nix b/pkgs/development/libraries/libiscsi/default.nix
index 1008037c60cc..2a0d722c3d0f 100644
--- a/pkgs/development/libraries/libiscsi/default.nix
+++ b/pkgs/development/libraries/libiscsi/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook ];
 
-  env = lib.optionalAttrs (stdenv.is32bit || stdenv.isDarwin) {
+  env = lib.optionalAttrs (stdenv.hostPlatform.is32bit || stdenv.hostPlatform.isDarwin) {
     # iscsi-discard.c:223:57: error: format specifies type 'unsigned long' but the argument has type 'uint64_t' (aka 'unsigned long long') [-Werror,-Wformat]
     NIX_CFLAGS_COMPILE = "-Wno-error=format";
   };
diff --git a/pkgs/development/libraries/libks/default.nix b/pkgs/development/libraries/libks/default.nix
index 4122d4f57617..cc6311f024ac 100644
--- a/pkgs/development/libraries/libks/default.nix
+++ b/pkgs/development/libraries/libks/default.nix
@@ -37,8 +37,8 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isLinux libuuid
-    ++ lib.optional stdenv.isDarwin libossp_uuid;
+    ++ lib.optional stdenv.hostPlatform.isLinux libuuid
+    ++ lib.optional stdenv.hostPlatform.isDarwin libossp_uuid;
 
   passthru = {
     tests.freeswitch = freeswitch;
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Foundational support for signalwire C products";
     homepage = "https://github.com/signalwire/libks";
     maintainers = with lib.maintainers; [ misuzu ];
diff --git a/pkgs/development/libraries/liblastfm/default.nix b/pkgs/development/libraries/liblastfm/default.nix
index 7dcc3b0d0cc0..060839326b15 100644
--- a/pkgs/development/libraries/liblastfm/default.nix
+++ b/pkgs/development/libraries/liblastfm/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config which cmake ];
   buildInputs = [ fftwSinglePrec libsamplerate qtbase ]
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.SystemConfiguration;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.SystemConfiguration;
 
   env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "11") "-std=c++11";
 
diff --git a/pkgs/development/libraries/liblinear/default.nix b/pkgs/development/libraries/liblinear/default.nix
index 449792a07e82..31da8305be7a 100644
--- a/pkgs/development/libraries/liblinear/default.nix
+++ b/pkgs/development/libraries/liblinear/default.nix
@@ -20,7 +20,7 @@ in stdenv.mkDerivation rec {
   buildFlags = [ "lib" "predict" "train" ];
 
   installPhase = ''
-    ${if stdenv.isDarwin then ''
+    ${if stdenv.hostPlatform.isDarwin then ''
       install -D liblinear.so.${soVersion} $out/lib/liblinear.${soVersion}.dylib
       ln -s $out/lib/liblinear.${soVersion}.dylib $out/lib/liblinear.dylib
     '' else ''
diff --git a/pkgs/development/libraries/liblqr-1/default.nix b/pkgs/development/libraries/liblqr-1/default.nix
index 6b8c2ebeaa94..f2f6497b676b 100644
--- a/pkgs/development/libraries/liblqr-1/default.nix
+++ b/pkgs/development/libraries/liblqr-1/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = lib.optionals stdenv.isDarwin [ Carbon AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Carbon AppKit ];
   propagatedBuildInputs = [ glib ];
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/liblxi/default.nix b/pkgs/development/libraries/liblxi/default.nix
index 24c454d4ee7e..887c751ad46b 100644
--- a/pkgs/development/libraries/liblxi/default.nix
+++ b/pkgs/development/libraries/liblxi/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ meson ninja cmake pkg-config rpcsvc-proto ];
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libtirpc
     avahi
   ] ++ [
diff --git a/pkgs/development/libraries/libmcrypt/default.nix b/pkgs/development/libraries/libmcrypt/default.nix
index 6a4b0adfefb4..3ed85fad550d 100644
--- a/pkgs/development/libraries/libmcrypt/default.nix
+++ b/pkgs/development/libraries/libmcrypt/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0gipgb939vy9m66d3k8il98rvvwczyaw2ixr8yn6icds9c3nrsz4";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin cctools;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin cctools;
 
   configureFlags = lib.optionals disablePosixThreads [ "--disable-posix-threads" ]
     ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
diff --git a/pkgs/development/libraries/libmemcached/default.nix b/pkgs/development/libraries/libmemcached/default.nix
index 07fe854c777c..053cd91be2d9 100644
--- a/pkgs/development/libraries/libmemcached/default.nix
+++ b/pkgs/development/libraries/libmemcached/default.nix
@@ -14,8 +14,8 @@ stdenv.mkDerivation rec {
   # https://bugs.launchpad.net/libmemcached/+bug/1281907
   # Fix building on macOS (patch from Homebrew)
   # https://bugs.launchpad.net/libmemcached/+bug/1245562
-  patches = lib.optional stdenv.isLinux ./libmemcached-fix-linking-with-libpthread.patch
-    ++ lib.optional stdenv.isDarwin (fetchpatch {
+  patches = lib.optional stdenv.hostPlatform.isLinux ./libmemcached-fix-linking-with-libpthread.patch
+    ++ lib.optional stdenv.hostPlatform.isDarwin (fetchpatch {
       url = "https://raw.githubusercontent.com/Homebrew/homebrew/bfd4a0a4626b61c2511fdf573bcbbc6bbe86340e/Library/Formula/libmemcached.rb";
       sha256 = "1gjf3vd7hiyzxjvlg2zfc3y2j0lyr6nhbws4xb5dmin3csyp8qb8";
     })
diff --git a/pkgs/development/libraries/libmesode/default.nix b/pkgs/development/libraries/libmesode/default.nix
index 128975246a8a..6ac53d3d5d3d 100644
--- a/pkgs/development/libraries/libmesode/default.nix
+++ b/pkgs/development/libraries/libmesode/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/profanity-im/libmesode/";
     license = with licenses; [ gpl3Only mit];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ devhell ];
   };
 }
diff --git a/pkgs/development/libraries/libmikmod/default.nix b/pkgs/development/libraries/libmikmod/default.nix
index f3122d8ab210..6e3f7eee3c57 100644
--- a/pkgs/development/libraries/libmikmod/default.nix
+++ b/pkgs/development/libraries/libmikmod/default.nix
@@ -13,14 +13,14 @@ in stdenv.mkDerivation rec {
   };
 
   buildInputs = [ texinfo ]
-    ++ optional stdenv.isLinux alsa-lib
-    ++ optional stdenv.isDarwin CoreAudio;
+    ++ optional stdenv.hostPlatform.isLinux alsa-lib
+    ++ optional stdenv.hostPlatform.isDarwin CoreAudio;
   propagatedBuildInputs =
-    optional stdenv.isLinux libpulseaudio;
+    optional stdenv.hostPlatform.isLinux libpulseaudio;
 
   outputs = [ "out" "dev" "man" ];
 
-  NIX_LDFLAGS = optionalString stdenv.isLinux "-lasound";
+  NIX_LDFLAGS = optionalString stdenv.hostPlatform.isLinux "-lasound";
 
   postInstall = ''
     moveToOutput bin/libmikmod-config "$dev"
diff --git a/pkgs/development/libraries/libmilter/default.nix b/pkgs/development/libraries/libmilter/default.nix
index a06f3d4deca1..10a098693679 100644
--- a/pkgs/development/libraries/libmilter/default.nix
+++ b/pkgs/development/libraries/libmilter/default.nix
@@ -34,9 +34,9 @@ stdenv.mkDerivation rec {
 
   patches = [ ./install.patch ./sharedlib.patch ./darwin.patch ];
 
-  nativeBuildInputs = [ m4 ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = [ m4 ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     fixDarwinDylibNames $out/lib/libmilter.*.1
   '';
 
diff --git a/pkgs/development/libraries/libminc/default.nix b/pkgs/development/libraries/libminc/default.nix
index 189d2b12e519..b270b8eb5668 100644
--- a/pkgs/development/libraries/libminc/default.nix
+++ b/pkgs/development/libraries/libminc/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DLIBMINC_USE_SYSTEM_NIFTI=ON"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
     # -j1: see https://github.com/BIC-MNI/libminc/issues/110
   checkPhase = ''
     ctest -j1 --output-on-failure
diff --git a/pkgs/development/libraries/libmongocrypt/default.nix b/pkgs/development/libraries/libmongocrypt/default.nix
index f45d41fed628..0c887527307f 100644
--- a/pkgs/development/libraries/libmongocrypt/default.nix
+++ b/pkgs/development/libraries/libmongocrypt/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     mongoc
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Security
   ];
 
diff --git a/pkgs/development/libraries/libmpeg2/default.nix b/pkgs/development/libraries/libmpeg2/default.nix
index baada92d4340..13fce963738f 100644
--- a/pkgs/development/libraries/libmpeg2/default.nix
+++ b/pkgs/development/libraries/libmpeg2/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   # Otherwise clang fails with 'duplicate symbol ___sputc'
-  buildFlags = lib.optional stdenv.isDarwin "CFLAGS=-std=gnu89";
+  buildFlags = lib.optional stdenv.hostPlatform.isDarwin "CFLAGS=-std=gnu89";
 
   meta = {
     homepage = "http://libmpeg2.sourceforge.net/";
diff --git a/pkgs/development/libraries/libmtp/default.nix b/pkgs/development/libraries/libmtp/default.nix
index ea61234333b8..320873c9792c 100644
--- a/pkgs/development/libraries/libmtp/default.nix
+++ b/pkgs/development/libraries/libmtp/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
 
   configurePlatforms = [ "build" "host" ];
 
-  makeFlags = lib.optionals (stdenv.isLinux && !stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
+  makeFlags = lib.optionals (stdenv.hostPlatform.isLinux && !stdenv.buildPlatform.canExecute stdenv.hostPlatform) [
     "MTP_HOTPLUG=${buildPackages.libmtp}/bin/mtp-hotplug"
   ];
 
diff --git a/pkgs/development/libraries/libnatpmp/default.nix b/pkgs/development/libraries/libnatpmp/default.nix
index 49e89b97344b..13128e81231e 100644
--- a/pkgs/development/libraries/libnatpmp/default.nix
+++ b/pkgs/development/libraries/libnatpmp/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     "CC:=$(CC)"
   ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   postFixup = ''
     chmod +x $out/lib/*
diff --git a/pkgs/development/libraries/libnfc/default.nix b/pkgs/development/libraries/libnfc/default.nix
index 88bc909ea0e6..8fb983333c1c 100644
--- a/pkgs/development/libraries/libnfc/default.nix
+++ b/pkgs/development/libraries/libnfc/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     "sysconfdir=/etc"
   ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DLIBNFC_DRIVER_PN532_I2C=OFF"
     "-DLIBNFC_DRIVER_PN532_SPI=OFF"
   ];
diff --git a/pkgs/development/libraries/libngspice/default.nix b/pkgs/development/libraries/libngspice/default.nix
index 3578441dd61a..0270050cd001 100644
--- a/pkgs/development/libraries/libngspice/default.nix
+++ b/pkgs/development/libraries/libngspice/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals (!withNgshared) [
     libXaw
     libXext
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.openmp
   ];
 
diff --git a/pkgs/development/libraries/libofx/default.nix b/pkgs/development/libraries/libofx/default.nix
index b7dddd16672c..ec5f6d8924d7 100644
--- a/pkgs/development/libraries/libofx/default.nix
+++ b/pkgs/development/libraries/libofx/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   preConfigure = "./autogen.sh";
   configureFlags = [ "--with-opensp-includes=${opensp}/include/OpenSP" ];
   nativeBuildInputs = [ pkg-config libtool autoconf automake gengetopt ];
-  buildInputs = [ opensp libxml2 curl ] ++ lib.optional stdenv.isDarwin libiconv;
+  buildInputs = [ opensp libxml2 curl ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   meta = {
     description = "Opensource implementation of the Open Financial eXchange specification";
diff --git a/pkgs/development/libraries/liboil/default.nix b/pkgs/development/libraries/liboil/default.nix
index 4b112b70e7ad..2abbaa66f347 100644
--- a/pkgs/development/libraries/liboil/default.nix
+++ b/pkgs/development/libraries/liboil/default.nix
@@ -18,10 +18,10 @@ stdenv.mkDerivation rec {
 
   # fix "argb_paint_i386.c:53:Incorrect register `%rax' used with `l' suffix"
   # errors
-  configureFlags = lib.optional (stdenv.isDarwin && stdenv.isx86_64) "--build=x86_64";
+  configureFlags = lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "--build=x86_64";
 
   # fixes a cast in inline asm: easier than patching
-  buildFlags = lib.optional stdenv.isDarwin "CFLAGS=-fheinous-gnu-extensions";
+  buildFlags = lib.optional stdenv.hostPlatform.isDarwin "CFLAGS=-fheinous-gnu-extensions";
 
   meta = with lib; {
     description = "Library of simple functions that are optimized for various CPUs";
diff --git a/pkgs/development/libraries/libopenshot-audio/default.nix b/pkgs/development/libraries/libopenshot-audio/default.nix
index 236b3026068f..2d8cec21b189 100644
--- a/pkgs/development/libraries/libopenshot-audio/default.nix
+++ b/pkgs/development/libraries/libopenshot-audio/default.nix
@@ -40,9 +40,9 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ (if stdenv.isDarwin then [
+  ] ++ (if stdenv.hostPlatform.isDarwin then [
     Accelerate
     AGL
     Cocoa
diff --git a/pkgs/development/libraries/libopenshot/default.nix b/pkgs/development/libraries/libopenshot/default.nix
index 0d83fa659e53..231b0cd109aa 100644
--- a/pkgs/development/libraries/libopenshot/default.nix
+++ b/pkgs/development/libraries/libopenshot/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-9X2UIRDD+1kNLbV8AnnPabdO2M0OfTDxQ7xyZtsE10k=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     # Darwin requires both Magick++ and MagickCore for a successful linkage
     ./0001-link-magickcore.diff
   ];
@@ -51,9 +51,9 @@ stdenv.mkDerivation (finalAttrs: {
     qtbase
     qtmultimedia
     zeromq
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.openmp
   ];
 
diff --git a/pkgs/development/libraries/libossp-uuid/default.nix b/pkgs/development/libraries/libossp-uuid/default.nix
index a283df1bbaea..267829d2aee4 100644
--- a/pkgs/development/libraries/libossp-uuid/default.nix
+++ b/pkgs/development/libraries/libossp-uuid/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "ac_cv_va_copy=yes"
-  ] ++ lib.optional stdenv.isFreeBSD "--with-pic";
+  ] ++ lib.optional stdenv.hostPlatform.isFreeBSD "--with-pic";
 
   patches = [ ./shtool.patch ];
 
diff --git a/pkgs/development/libraries/libpcap/default.nix b/pkgs/development/libraries/libpcap/default.nix
index 7256e4922605..bfc2e3af7b8e 100644
--- a/pkgs/development/libraries/libpcap/default.nix
+++ b/pkgs/development/libraries/libpcap/default.nix
@@ -30,18 +30,18 @@ stdenv.mkDerivation rec {
     hash = "sha256-7RmgOD+tcuOtQ1/SOdfNgNZJFrhyaVUBWdIORxYOvl8=";
   };
 
-  buildInputs = lib.optionals stdenv.isLinux [ libnl ]
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libnl ]
     ++ lib.optionals withRemote [ libxcrypt ];
 
   nativeBuildInputs = [ flex bison ]
-    ++ lib.optionals stdenv.isLinux [ pkg-config ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ]
     ++ lib.optionals withBluez [ bluez.dev ];
 
   # We need to force the autodetection because detection doesn't
   # work in pure build environments.
   configureFlags = [
-    "--with-pcap=${if stdenv.isLinux then "linux" else "bpf"}"
-  ] ++ lib.optionals stdenv.isDarwin [
+    "--with-pcap=${if stdenv.hostPlatform.isLinux then "linux" else "bpf"}"
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--disable-universal"
   ] ++ lib.optionals withRemote [
     "--enable-remote"
diff --git a/pkgs/development/libraries/libphonenumber/default.nix b/pkgs/development/libraries/libphonenumber/default.nix
index 5e23947ed3bc..616b5de5deb6 100644
--- a/pkgs/development/libraries/libphonenumber/default.nix
+++ b/pkgs/development/libraries/libphonenumber/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
     boost
     icu
     protobuf
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
   ];
 
diff --git a/pkgs/development/libraries/libpipeline/default.nix b/pkgs/development/libraries/libpipeline/default.nix
index 3aeb79b46af8..885c9044332c 100644
--- a/pkgs/development/libraries/libpipeline/default.nix
+++ b/pkgs/development/libraries/libpipeline/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-uLRRlJiQIqeewTF/ZKKnWxVRsqVb6gb2dwTLKi5GkLA=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [ ./fix-on-osx.patch ];
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [ ./fix-on-osx.patch ];
 
   # necessary to build on FreeBSD native pending inclusion of
   # https://git.savannah.gnu.org/cgit/config.git/commit/?id=e4786449e1c26716e3f9ea182caf472e4dbc96e0
diff --git a/pkgs/development/libraries/libplacebo/default.nix b/pkgs/development/libraries/libplacebo/default.nix
index 0ffa7b2828f3..159037bec832 100644
--- a/pkgs/development/libraries/libplacebo/default.nix
+++ b/pkgs/development/libraries/libplacebo/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     (lib.mesonEnable "glslang" false) # rely on shaderc for GLSL compilation instead
     (lib.mesonEnable "vk-proc-addr" vulkanSupport)
     (lib.mesonOption "vulkan-registry" "${vulkan-headers}/share/vulkan/registry/vk.xml")
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (lib.mesonEnable "unwind" false) # libplacebo doesn’t build with `darwin.libunwind`
   ];
 
diff --git a/pkgs/development/libraries/libpng/default.nix b/pkgs/development/libraries/libpng/default.nix
index 11e3fb31604f..57b75a949b7d 100644
--- a/pkgs/development/libraries/libpng/default.nix
+++ b/pkgs/development/libraries/libpng/default.nix
@@ -21,7 +21,7 @@ in stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-alygZSOSotfJ2yrltAIQhDwLvAgcvUEIJasAzFnxSmw=";
   };
   postPatch = whenPatched "gunzip < ${patch_src} | patch -Np1"
-  + lib.optionalString stdenv.isFreeBSD ''
+  + lib.optionalString stdenv.hostPlatform.isFreeBSD ''
 
     sed -i 1i'int feenableexcept(int __mask);' contrib/libtests/pngvalid.c
   '';
diff --git a/pkgs/development/libraries/libqglviewer/default.nix b/pkgs/development/libraries/libqglviewer/default.nix
index fd10ccc5375c..ec2234bb9a28 100644
--- a/pkgs/development/libraries/libqglviewer/default.nix
+++ b/pkgs/development/libraries/libqglviewer/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ qmake ];
   buildInputs = [ qtbase libGLU ]
-    ++ lib.optional stdenv.isDarwin AGL;
+    ++ lib.optional stdenv.hostPlatform.isDarwin AGL;
 
   dontWrapQtApps = true;
 
diff --git a/pkgs/development/libraries/librasterlite2/default.nix b/pkgs/development/libraries/librasterlite2/default.nix
index de9fa02d44db..a1655dc6a13d 100644
--- a/pkgs/development/libraries/librasterlite2/default.nix
+++ b/pkgs/development/libraries/librasterlite2/default.nix
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
     proj
     sqlite
     zstd
-  ] ++ lib.optional stdenv.isDarwin ApplicationServices;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin ApplicationServices;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/libre/default.nix b/pkgs/development/libraries/libre/default.nix
index fa419830f3c7..ebdf2ec4d8a6 100644
--- a/pkgs/development/libraries/libre/default.nix
+++ b/pkgs/development/libraries/libre/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     SystemConfiguration
   ];
 
diff --git a/pkgs/development/libraries/libredwg/default.nix b/pkgs/development/libraries/libredwg/default.nix
index 6eb06a1ebe67..aff1fc1a1d68 100644
--- a/pkgs/development/libraries/libredwg/default.nix
+++ b/pkgs/development/libraries/libredwg/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     cp ${printVersion} build-aux/git-version-gen
   '';
 
-  preConfigure = lib.optionalString (stdenv.isDarwin && enablePython) ''
+  preConfigure = lib.optionalString (stdenv.hostPlatform.isDarwin && enablePython) ''
     # prevent configure picking up stack_size from distutils.sysconfig
     export PYTHON_EXTRA_LDFLAGS=" "
   '';
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
   configureFlags = lib.optional (!enablePython) "--disable-python";
 
   # FAIL: alive.test
-  doCheck = !stdenv.isLinux;
+  doCheck = !stdenv.hostPlatform.isLinux;
 
   # the "xmlsuite" test requires the libxml2 c library as well as the python module
   nativeCheckInputs = lib.optionals enablePython [ libxml2 libxml2.dev ];
diff --git a/pkgs/development/libraries/libremidi/default.nix b/pkgs/development/libraries/libremidi/default.nix
index 48014bea0741..6717b97203b7 100644
--- a/pkgs/development/libraries/libremidi/default.nix
+++ b/pkgs/development/libraries/libremidi/default.nix
@@ -22,8 +22,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = lib.optional stdenv.isLinux alsa-lib
-    ++ lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux alsa-lib
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreAudio
     CoreFoundation
     CoreMIDI
diff --git a/pkgs/development/libraries/libressl/default.nix b/pkgs/development/libraries/libressl/default.nix
index 9629c0e961a9..f6cf4a6e62c8 100644
--- a/pkgs/development/libraries/libressl/default.nix
+++ b/pkgs/development/libraries/libressl/default.nix
@@ -8,7 +8,7 @@
 }:
 
 let
-  ldLibPathEnvName = if stdenv.isDarwin
+  ldLibPathEnvName = if stdenv.hostPlatform.isDarwin
     then "DYLD_LIBRARY_PATH"
     else "LD_LIBRARY_PATH";
 
diff --git a/pkgs/development/libraries/librsb/default.nix b/pkgs/development/libraries/librsb/default.nix
index d9dc209a7139..4a995cbbe89d 100644
--- a/pkgs/development/libraries/librsb/default.nix
+++ b/pkgs/development/libraries/librsb/default.nix
@@ -83,6 +83,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ KarlJoad ];
     platforms = platforms.all;
     # ./rsb_common.h:56:10: fatal error: 'omp.h' file not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/librsvg/default.nix b/pkgs/development/libraries/librsvg/default.nix
index e8426b97cec5..932d0f19a7d2 100644
--- a/pkgs/development/libraries/librsvg/default.nix
+++ b/pkgs/development/libraries/librsvg/default.nix
@@ -87,7 +87,7 @@ stdenv.mkDerivation (finalAttrs: {
     pango
     libintl
     vala # for share/vala/Makefile.vapigen
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     Foundation
     libobjc
@@ -104,7 +104,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.enableFeature withIntrospection "vala")
 
     "--enable-always-build-tests"
-  ] ++ lib.optional stdenv.isDarwin "--disable-Bsymbolic"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-Bsymbolic"
     ++ lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) "RUST_TARGET=${stdenv.hostPlatform.rust.rustcTarget}";
 
   doCheck = false; # all tests fail on libtool-generated rsvg-convert not being able to find coreutils
@@ -115,7 +115,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # librsvg only links Foundation, but it also requiers libobjc. The Framework.tbd in the 11.0 SDK
   # reexports libobjc, but the one in the 10.12 SDK does not, so link it manually.
-  env = lib.optionalAttrs (stdenv.isDarwin && stdenv.isx86_64) {
+  env = lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) {
     NIX_LDFLAGS = "-lobjc";
   };
 
diff --git a/pkgs/development/libraries/librtprocess/default.nix b/pkgs/development/libraries/librtprocess/default.nix
index dabb5e62e45d..a8366f8a92df 100644
--- a/pkgs/development/libraries/librtprocess/default.nix
+++ b/pkgs/development/libraries/librtprocess/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ llvmPackages.openmp ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages.openmp ];
 
   meta = with lib; {
     description = "Highly optimized library for processing RAW images";
diff --git a/pkgs/development/libraries/libsamplerate/default.nix b/pkgs/development/libraries/libsamplerate/default.nix
index 45cd9d091dd0..ec4da5a34784 100644
--- a/pkgs/development/libraries/libsamplerate/default.nix
+++ b/pkgs/development/libraries/libsamplerate/default.nix
@@ -14,13 +14,13 @@ in stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ libsndfile ]
-    ++ optionals stdenv.isDarwin [ ApplicationServices CoreServices ];
+    ++ optionals stdenv.hostPlatform.isDarwin [ ApplicationServices CoreServices ];
 
   configureFlags = [ "--disable-fftw" ];
 
   outputs = [ "dev" "out" ];
 
-  postConfigure = optionalString stdenv.isDarwin ''
+  postConfigure = optionalString stdenv.hostPlatform.isDarwin ''
     # need headers from the Carbon.framework in /System/Library/Frameworks to
     # compile this on darwin -- not sure how to handle
     NIX_CFLAGS_COMPILE+=" -I${Carbon}/Library/Frameworks/Carbon.framework/Headers"
diff --git a/pkgs/development/libraries/libsbsms/common.nix b/pkgs/development/libraries/libsbsms/common.nix
index f206f68de42a..7215c23667b8 100644
--- a/pkgs/development/libraries/libsbsms/common.nix
+++ b/pkgs/development/libraries/libsbsms/common.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     # Fix buidling on platforms other than x86
     (substituteAll {
       src = ./configure.patch;
-      msse = lib.optionalString stdenv.isx86_64 "-msse";
+      msse = lib.optionalString stdenv.hostPlatform.isx86_64 "-msse";
     })
   ];
 
diff --git a/pkgs/development/libraries/libscrypt/default.nix b/pkgs/development/libraries/libscrypt/default.nix
index 6adc2124a3ab..4f8f0deba902 100644
--- a/pkgs/development/libraries/libscrypt/default.nix
+++ b/pkgs/development/libraries/libscrypt/default.nix
@@ -11,10 +11,10 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-QWWqC10bENemG5FYEog87tT7IxDaBJUDqu6j/sO3sYE=";
   };
 
-  buildFlags = lib.optional stdenv.isDarwin "LDFLAGS= LDFLAGS_EXTRA= CFLAGS_EXTRA=";
+  buildFlags = lib.optional stdenv.hostPlatform.isDarwin "LDFLAGS= LDFLAGS_EXTRA= CFLAGS_EXTRA=";
 
   installFlags = [ "PREFIX=$(out)" ];
-  installTargets = lib.optional stdenv.isDarwin "install-osx";
+  installTargets = lib.optional stdenv.hostPlatform.isDarwin "install-osx";
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/libsecret/default.nix b/pkgs/development/libraries/libsecret/default.nix
index d0b1515d0bad..8ae0754a0abd 100644
--- a/pkgs/development/libraries/libsecret/default.nix
+++ b/pkgs/development/libraries/libsecret/default.nix
@@ -83,7 +83,7 @@ stdenv.mkDerivation rec {
     (lib.mesonBool "gtk_doc" withIntrospection)
   ];
 
-  doCheck = stdenv.isLinux && withIntrospection;
+  doCheck = stdenv.hostPlatform.isLinux && withIntrospection;
   separateDebugInfo = true;
 
   postPatch = ''
diff --git a/pkgs/development/libraries/libsegfault/default.nix b/pkgs/development/libraries/libsegfault/default.nix
index 58896c3e2bc2..e9f014381c5b 100644
--- a/pkgs/development/libraries/libsegfault/default.nix
+++ b/pkgs/development/libraries/libsegfault/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     sha256 = "vKtY6ZEkyK2K+BzJCSo30f9MpERpPlUnarFIlvJ1Giw=";
   };
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin) "-DBOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED=1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin) "-DBOOST_STACKTRACE_GNU_SOURCE_NOT_REQUIRED=1";
 
   nativeBuildInputs = [
     meson
diff --git a/pkgs/development/libraries/libserialport/default.nix b/pkgs/development/libraries/libserialport/default.nix
index 79f46ffca1f8..0b3314d9b0e1 100644
--- a/pkgs/development/libraries/libserialport/default.nix
+++ b/pkgs/development/libraries/libserialport/default.nix
@@ -10,8 +10,8 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = lib.optional stdenv.isLinux udev
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.IOKit;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux udev
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.IOKit;
 
   meta = with lib; {
     description = "Cross-platform shared library for serial port access";
diff --git a/pkgs/development/libraries/libshumate/default.nix b/pkgs/development/libraries/libshumate/default.nix
index 17783999b53c..f449c5e1c1b7 100644
--- a/pkgs/development/libraries/libshumate/default.nix
+++ b/pkgs/development/libraries/libshumate/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Ddemos=true"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/development/libraries/libsndfile/default.nix b/pkgs/development/libraries/libsndfile/default.nix
index a1ffdae6bb33..ad3ab58b0e13 100644
--- a/pkgs/development/libraries/libsndfile/default.nix
+++ b/pkgs/development/libraries/libsndfile/default.nix
@@ -25,8 +25,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook autogen pkg-config python3 ];
   buildInputs = [ flac lame libmpg123 libogg libopus libvorbis ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals stdenv.isDarwin [ Carbon AudioToolbox ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon AudioToolbox ];
 
   enableParallelBuilding = true;
 
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   # need headers from the Carbon.framework in /System/Library/Frameworks to
   # compile this on darwin -- not sure how to handle
-  preConfigure = lib.optionalString stdenv.isDarwin
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin
     ''
       NIX_CFLAGS_COMPILE+=" -I$SDKROOT/System/Library/Frameworks/Carbon.framework/Versions/A/Headers"
     '';
diff --git a/pkgs/development/libraries/libsodium/default.nix b/pkgs/development/libraries/libsodium/default.nix
index 044450c1825d..a9de633d46d7 100644
--- a/pkgs/development/libraries/libsodium/default.nix
+++ b/pkgs/development/libraries/libsodium/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ autoreconfHook ];
 
-  separateDebugInfo = stdenv.isLinux && stdenv.hostPlatform.libc != "musl";
+  separateDebugInfo = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.libc != "musl";
 
   enableParallelBuilding = true;
   hardeningDisable = lib.optional (stdenv.hostPlatform.isMusl && stdenv.hostPlatform.isx86_32) "stackprotector";
diff --git a/pkgs/development/libraries/libsolv/default.nix b/pkgs/development/libraries/libsolv/default.nix
index a0f5cd610e34..df40a0633988 100644
--- a/pkgs/development/libraries/libsolv/default.nix
+++ b/pkgs/development/libraries/libsolv/default.nix
@@ -10,7 +10,7 @@
 , zchunk
 , zstd
 , expat
-, withRpm ? !stdenv.isDarwin
+, withRpm ? !stdenv.hostPlatform.isDarwin
 , rpm
 , db
 , withConda ? true
diff --git a/pkgs/development/libraries/libsoundio/default.nix b/pkgs/development/libraries/libsoundio/default.nix
index b7de8bf04e88..c4b501628272 100644
--- a/pkgs/development/libraries/libsoundio/default.nix
+++ b/pkgs/development/libraries/libsoundio/default.nix
@@ -14,14 +14,14 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ libjack2 ]
-    ++ lib.optionals stdenv.isLinux [ libpulseaudio alsa-lib ]
-    ++ lib.optional stdenv.isDarwin AudioUnit;
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libpulseaudio alsa-lib ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin AudioUnit;
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DBUILD_TESTS=OFF"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-strict-prototypes";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-strict-prototypes";
 
   meta = with lib; {
     description = "Cross platform audio input and output";
diff --git a/pkgs/development/libraries/libsoup/3.x.nix b/pkgs/development/libraries/libsoup/3.x.nix
index 4d5f30cf0b6e..b0588373dee3 100644
--- a/pkgs/development/libraries/libsoup/3.x.nix
+++ b/pkgs/development/libraries/libsoup/3.x.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     glib.out
     brotli
     libnghttp2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libsysprof-capture
   ];
 
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
 
     (lib.mesonEnable "docs" withIntrospection)
     (lib.mesonEnable "introspection" withIntrospection)
-    (lib.mesonEnable "sysprof" stdenv.isLinux)
+    (lib.mesonEnable "sysprof" stdenv.hostPlatform.isLinux)
     (lib.mesonEnable "vapi" withIntrospection)
   ];
 
diff --git a/pkgs/development/libraries/libsoup/default.nix b/pkgs/development/libraries/libsoup/default.nix
index e92c59bc2f2c..a88cd9355326 100644
--- a/pkgs/development/libraries/libsoup/default.nix
+++ b/pkgs/development/libraries/libsoup/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     libpsl
     glib.out
     brotli
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libsysprof-capture
   ];
 
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
     "-Dintrospection=${if withIntrospection then "enabled" else "disabled"}"
     "-Dgnome=${lib.boolToString gnomeSupport}"
     "-Dntlm=disabled"
-  ] ++ lib.optionals (!stdenv.isLinux) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Dsysprof=disabled"
   ];
 
diff --git a/pkgs/development/libraries/libspatialite/default.nix b/pkgs/development/libraries/libspatialite/default.nix
index 98d184ae703c..8eeec2dbfe0c 100644
--- a/pkgs/development/libraries/libspatialite/default.nix
+++ b/pkgs/development/libraries/libspatialite/default.nix
@@ -40,13 +40,13 @@ stdenv.mkDerivation rec {
     proj
     sqlite
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
   enableParallelBuilding = true;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s $out/lib/mod_spatialite.{so,dylib}
   '';
 
diff --git a/pkgs/development/libraries/libspnav/default.nix b/pkgs/development/libraries/libspnav/default.nix
index d67b12a726b4..6a60bdb7f090 100644
--- a/pkgs/development/libraries/libspnav/default.nix
+++ b/pkgs/development/libraries/libspnav/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "098h1jhlj87axpza5zgy58prp0zn94wyrbch6x0s7q4mzh7dc8ba";
   };
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
   buildInputs = [ libX11 ];
 
   patches = [
diff --git a/pkgs/development/libraries/libstatgrab/default.nix b/pkgs/development/libraries/libstatgrab/default.nix
index abda8137f5c8..9b45ffb58ce7 100644
--- a/pkgs/development/libraries/libstatgrab/default.nix
+++ b/pkgs/development/libraries/libstatgrab/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-VoiqSmhVR9cXSoo3PqnY7pJ+dm48wwK97jRSPCxdbBE=";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin IOKit;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin IOKit;
 
   meta = with lib; {
     homepage = "https://www.i-scream.org/libstatgrab/";
diff --git a/pkgs/development/libraries/libsvm/default.nix b/pkgs/development/libraries/libsvm/default.nix
index 9d58109fa8e3..1fd5141c9084 100644
--- a/pkgs/development/libraries/libsvm/default.nix
+++ b/pkgs/development/libraries/libsvm/default.nix
@@ -23,13 +23,13 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "bin" "dev" ];
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
 
   installPhase =
     let
       libSuff = stdenv.hostPlatform.extensions.sharedLibrary;
       soVersion = "3";
-      libName = if stdenv.isDarwin then "libsvm.${soVersion}${libSuff}" else "libsvm${libSuff}.${soVersion}";
+      libName = if stdenv.hostPlatform.isDarwin then "libsvm.${soVersion}${libSuff}" else "libsvm${libSuff}.${soVersion}";
     in
     ''
       runHook preInstall
diff --git a/pkgs/development/libraries/libtasn1/default.nix b/pkgs/development/libraries/libtasn1/default.nix
index 3c630bac630d..069d8706e74d 100644
--- a/pkgs/development/libraries/libtasn1/default.nix
+++ b/pkgs/development/libraries/libtasn1/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ texinfo perl ];
 
   doCheck = true;
-  preCheck = if stdenv.isDarwin then
+  preCheck = if stdenv.hostPlatform.isDarwin then
     "export DYLD_LIBRARY_PATH=`pwd`/lib/.libs"
   else
     null;
diff --git a/pkgs/development/libraries/libticalcs2/default.nix b/pkgs/development/libraries/libticalcs2/default.nix
index 2488a5bbb0b4..551bfed8fc8b 100644
--- a/pkgs/development/libraries/libticalcs2/default.nix
+++ b/pkgs/development/libraries/libticalcs2/default.nix
@@ -33,9 +33,9 @@ stdenv.mkDerivation rec {
     libticables2
     xz
     bzip2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     acl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libobjc
   ];
 
diff --git a/pkgs/development/libraries/libtiger/default.nix b/pkgs/development/libraries/libtiger/default.nix
index cd198dac309d..149f5e65fc41 100644
--- a/pkgs/development/libraries/libtiger/default.nix
+++ b/pkgs/development/libraries/libtiger/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ libkate pango cairo ]
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.ApplicationServices;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.ApplicationServices;
 
   meta = {
     homepage = "https://code.google.com/archive/p/libtiger/";
diff --git a/pkgs/development/libraries/libtomcrypt/default.nix b/pkgs/development/libraries/libtomcrypt/default.nix
index 2a32900040d8..568d1a22c6a8 100644
--- a/pkgs/development/libraries/libtomcrypt/default.nix
+++ b/pkgs/development/libraries/libtomcrypt/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   # Fixes a build failure on aarch64-darwin. Define for all Darwin targets for when x86_64-darwin
   # upgrades to a newer SDK.
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DTARGET_OS_IPHONE=0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DTARGET_OS_IPHONE=0";
 
   patches = [
     (fetchpatch {
diff --git a/pkgs/development/libraries/libtommath/default.nix b/pkgs/development/libraries/libtommath/default.nix
index 2501bc827fae..56225f96de8c 100644
--- a/pkgs/development/libraries/libtommath/default.nix
+++ b/pkgs/development/libraries/libtommath/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   makefile = "makefile.shared";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-DTARGET_OS_IPHONE=0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-DTARGET_OS_IPHONE=0";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/libubox/default.nix b/pkgs/development/libraries/libubox/default.nix
index e48748308bb2..1a3a89a2d71d 100644
--- a/pkgs/development/libraries/libubox/default.nix
+++ b/pkgs/development/libraries/libubox/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
     done
   '';
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "-Wno-error=gnu-folding-constant"
   ]);
 
diff --git a/pkgs/development/libraries/libuchardet/default.nix b/pkgs/development/libraries/libuchardet/default.nix
index 1b54ea948dd0..12f210593107 100644
--- a/pkgs/development/libraries/libuchardet/default.nix
+++ b/pkgs/development/libraries/libuchardet/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  doCheck = !stdenv.isi686; # tests fail on i686
+  doCheck = !stdenv.hostPlatform.isi686; # tests fail on i686
 
   meta = with lib; {
     description = "Mozilla's Universal Charset Detector C/C++ API";
diff --git a/pkgs/development/libraries/libui/default.nix b/pkgs/development/libraries/libui/default.nix
index a798977b1f41..77197986343f 100644
--- a/pkgs/development/libraries/libui/default.nix
+++ b/pkgs/development/libraries/libui/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkg-config, gtk3, Cocoa }:
 
 let
-  backend   = if stdenv.isDarwin then "darwin" else "unix";
+  backend   = if stdenv.hostPlatform.isDarwin then "darwin" else "unix";
 in
 
 stdenv.mkDerivation rec {
@@ -15,20 +15,20 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake pkg-config ];
-  propagatedBuildInputs = lib.optional stdenv.isLinux gtk3
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isLinux gtk3
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's/set(CMAKE_OSX_DEPLOYMENT_TARGET "10.8")//' ./CMakeLists.txt
   '';
 
   installPhase = ''
     mkdir -p $out/{include,lib}
     mkdir -p $out/lib/pkgconfig
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     mv ./out/libui.so.0 $out/lib/
     ln -s $out/lib/libui.so.0 $out/lib/libui.so
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mv ./out/libui.A.dylib $out/lib/
     ln -s $out/lib/libui.A.dylib $out/lib/libui.dylib
   '' + ''
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
       --subst-var-by out $out \
       --subst-var-by version "${version}"
   '';
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libui.A.dylib $out/lib/libui.A.dylib
   '';
 
diff --git a/pkgs/development/libraries/libuiohook/default.nix b/pkgs/development/libraries/libuiohook/default.nix
index 4fe42dad6c89..7d58b7814958 100644
--- a/pkgs/development/libraries/libuiohook/default.nix
+++ b/pkgs/development/libraries/libuiohook/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
 
   buildInputs =
-    if stdenv.isDarwin then [ AppKit ApplicationServices Carbon ]
+    if stdenv.hostPlatform.isDarwin then [ AppKit ApplicationServices Carbon ]
     else [
       libX11
       libxkbcommon
diff --git a/pkgs/development/libraries/libunarr/default.nix b/pkgs/development/libraries/libunarr/default.nix
index d73bed773dff..c53196afe420 100644
--- a/pkgs/development/libraries/libunarr/default.nix
+++ b/pkgs/development/libraries/libunarr/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-Mo76BOqZbdOJFrEkeozxdqwpuFyvkhdONNMZmN5BdNI=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace "-flto" "" \
       --replace "AppleClang" "Clang"
diff --git a/pkgs/development/libraries/libunistring/default.nix b/pkgs/development/libraries/libunistring/default.nix
index 13ffffe6aa74..abf5f0df2558 100644
--- a/pkgs/development/libraries/libunistring/default.nix
+++ b/pkgs/development/libraries/libunistring/default.nix
@@ -29,8 +29,8 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   strictDeps = true;
-  propagatedBuildInputs = lib.optional (!stdenv.isLinux) libiconv;
-  buildInputs = lib.optionals stdenv.isDarwin [
+  propagatedBuildInputs = lib.optional (!stdenv.hostPlatform.isLinux) libiconv;
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
   nativeBuildInputs = [ updateAutotoolsGnuConfigScriptsHook ];
diff --git a/pkgs/development/libraries/libusb1/default.nix b/pkgs/development/libraries/libusb1/default.nix
index bd8561e0e8a3..f03ae09b2895 100644
--- a/pkgs/development/libraries/libusb1/default.nix
+++ b/pkgs/development/libraries/libusb1/default.nix
@@ -4,7 +4,7 @@
 , autoreconfHook
 , doxygen
 , pkg-config
-, enableUdev ? stdenv.isLinux && !stdenv.hostPlatform.isStatic
+, enableUdev ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isStatic
 , udev
 , libobjc
 , IOKit
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals withDocs [ doxygen ];
   propagatedBuildInputs =
     lib.optional enableUdev udev ++
-    lib.optionals stdenv.isDarwin [ libobjc IOKit Security ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ libobjc IOKit Security ];
 
   dontDisableStatic = withStatic;
 
diff --git a/pkgs/development/libraries/libusbsio/default.nix b/pkgs/development/libraries/libusbsio/default.nix
index 090683898a16..21c7e3f1396e 100644
--- a/pkgs/development/libraries/libusbsio/default.nix
+++ b/pkgs/development/libraries/libusbsio/default.nix
@@ -28,17 +28,17 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
   buildInputs = [
     libusb1
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     AppKit
     CoreFoundation
     IOKit
-  ]) ++ lib.optionals stdenv.isLinux [
+  ]) ++ lib.optionals stdenv.hostPlatform.isLinux [
     systemdMinimal # libudev
   ];
 
diff --git a/pkgs/development/libraries/libuv/default.nix b/pkgs/development/libraries/libuv/default.nix
index a4254921e179..8d1d36344d7e 100644
--- a/pkgs/development/libraries/libuv/default.nix
+++ b/pkgs/development/libraries/libuv/default.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
       "tcp_bind6_error_addrinuse" "tcp_bind_error_addrinuse_listen"
       # https://github.com/libuv/libuv/pull/4075#issuecomment-1935572237
       "thread_priority"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
         # Sometimes: timeout (no output), failed uv_listen. Someone
         # should report these failures to libuv team. There tests should
         # be much more robust.
@@ -71,10 +71,10 @@ stdenv.mkDerivation (finalAttrs: {
         "fs_event_watch_dir_recursive" "fs_event_watch_file"
         "fs_event_watch_file_current_dir" "fs_event_watch_file_exact_path"
         "process_priority" "udp_create_early_bad_bind"
-    ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
         # fail on macos < 10.15 (starting in libuv 1.47.0)
         "fs_write_alotof_bufs_with_offset" "fs_write_multiple_bufs" "fs_read_bufs"
-    ] ++ lib.optionals stdenv.isAarch32 [
+    ] ++ lib.optionals stdenv.hostPlatform.isAarch32 [
       # I observe this test failing with some regularity on ARMv7:
       # https://github.com/libuv/libuv/issues/1871
       "shutdown_close_pipe"
diff --git a/pkgs/development/libraries/libva/1.nix b/pkgs/development/libraries/libva/1.nix
index 1a9c7309e542..15e4d0a9e801 100644
--- a/pkgs/development/libraries/libva/1.nix
+++ b/pkgs/development/libraries/libva/1.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   # TODO: share libs between minimal and !minimal - perhaps just symlink them
 
   # Add FHS paths for non-NixOS applications.
-  configureFlags = lib.optionals stdenv.isLinux [ "--with-drivers-path=${mesa.driverLink}/lib/dri:/usr/lib/dri:/usr/lib32/dri" ]
+  configureFlags = lib.optionals stdenv.hostPlatform.isLinux [ "--with-drivers-path=${mesa.driverLink}/lib/dri:/usr/lib/dri:/usr/lib32/dri" ]
     ++ lib.optionals (!minimal) [ "--enable-glx" ];
 
   installFlags = [ "dummy_drv_video_ladir=$(out)/lib/dri" ];
diff --git a/pkgs/development/libraries/libva/default.nix b/pkgs/development/libraries/libva/default.nix
index 8a41c60b169f..f88404682b44 100644
--- a/pkgs/development/libraries/libva/default.nix
+++ b/pkgs/development/libraries/libva/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [ libdrm ]
     ++ lib.optionals (!minimal) [ libX11 libXext libXfixes wayland libffi libGL ];
 
-  mesonFlags = lib.optionals stdenv.isLinux [
+  mesonFlags = lib.optionals stdenv.hostPlatform.isLinux [
     # Add FHS and Debian paths for non-NixOS applications
     "-Ddriverdir=${mesa.driverLink}/lib/dri:/usr/lib/dri:/usr/lib32/dri:/usr/lib/x86_64-linux-gnu/dri:/usr/lib/i386-linux-gnu/dri"
   ];
diff --git a/pkgs/development/libraries/libvdpau/default.nix b/pkgs/development/libraries/libvdpau/default.nix
index 8c1c3b7c5e9c..75c61995071e 100644
--- a/pkgs/development/libraries/libvdpau/default.nix
+++ b/pkgs/development/libraries/libvdpau/default.nix
@@ -17,9 +17,9 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ xorg.libX11 ];
 
-  mesonFlags = lib.optionals stdenv.isLinux [ "-Dmoduledir=${mesa.driverLink}/lib/vdpau" ];
+  mesonFlags = lib.optionals stdenv.hostPlatform.isLinux [ "-Dmoduledir=${mesa.driverLink}/lib/vdpau" ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-lX11";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-lX11";
 
   meta = with lib; {
     homepage = "https://www.freedesktop.org/wiki/Software/VDPAU/";
diff --git a/pkgs/development/libraries/libvirt-glib/default.nix b/pkgs/development/libraries/libvirt-glib/default.nix
index b01a9a788bad..c750d2a25551 100644
--- a/pkgs/development/libraries/libvirt-glib/default.nix
+++ b/pkgs/development/libraries/libvirt-glib/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libvirt
     libxml2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap_ng
   ];
 
diff --git a/pkgs/development/libraries/libvirt/default.nix b/pkgs/development/libraries/libvirt/default.nix
index 56b0b0a39089..f6e5807f6958 100644
--- a/pkgs/development/libraries/libvirt/default.nix
+++ b/pkgs/development/libraries/libvirt/default.nix
@@ -72,14 +72,14 @@
 , enableIscsi ? false
 , openiscsi
 , libiscsi
-, enableXen ? stdenv.isLinux && stdenv.isx86_64
+, enableXen ? stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64
 , xen
-, enableZfs ? stdenv.isLinux
+, enableZfs ? stdenv.hostPlatform.isLinux
 , zfs
 }:
 
 let
-  inherit (stdenv) isDarwin isLinux isx86_64;
+  inherit (stdenv.hostPlatform) isDarwin isLinux isx86_64;
   binPath = lib.makeBinPath ([
     dnsmasq
   ] ++ lib.optionals isLinux [
diff --git a/pkgs/development/libraries/libvncserver/default.nix b/pkgs/development/libraries/libvncserver/default.nix
index a6c78c3262fc..e6b5bf4acb5b 100644
--- a/pkgs/development/libraries/libvncserver/default.nix
+++ b/pkgs/development/libraries/libvncserver/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     libpng
   ] ++ lib.optionals withSystemd [
     systemd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
   ];
 
diff --git a/pkgs/development/libraries/libvpx/default.nix b/pkgs/development/libraries/libvpx/default.nix
index ef0929a841d8..4f6c91d65c71 100644
--- a/pkgs/development/libraries/libvpx/default.nix
+++ b/pkgs/development/libraries/libvpx/default.nix
@@ -43,7 +43,7 @@
 }:
 
 let
-  inherit (stdenv) is64bit isMips isDarwin isCygwin;
+  inherit (stdenv.hostPlatform) is64bit isMips isDarwin isCygwin;
   inherit (lib) enableFeature optional optionals;
 
   # libvpx darwin targets include darwin version (ie. ARCH-darwinXX-gcc, XX being the darwin version)
@@ -66,8 +66,8 @@ let
 
   kernel =
     # Build system doesn't understand BSD, so pretend to be Linux.
-    /**/ if stdenv.isBSD then "linux"
-    else if stdenv.isDarwin then "darwin${darwinVersion}"
+    /**/ if stdenv.hostPlatform.isBSD then "linux"
+    else if stdenv.hostPlatform.isDarwin then "darwin${darwinVersion}"
     else stdenv.hostPlatform.parsed.kernel.name;
 
   isGeneric =
@@ -76,7 +76,7 @@ let
     || stdenv.hostPlatform.isRiscV;
 
   target =
-    /**/ if (stdenv.isBSD || stdenv.hostPlatform != stdenv.buildPlatform) then
+    /**/ if (stdenv.hostPlatform.isBSD || stdenv.hostPlatform != stdenv.buildPlatform) then
       (if isGeneric then "generic-gnu" else "${cpu}-${kernel}-gcc")
     else null;
 in
diff --git a/pkgs/development/libraries/libwnck/2.nix b/pkgs/development/libraries/libwnck/2.nix
index bc5a89dc120d..890b1a7651a8 100644
--- a/pkgs/development/libraries/libwnck/2.nix
+++ b/pkgs/development/libraries/libwnck/2.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation rec {
     maintainers = with lib.maintainers; [ johnazoidberg ];
     # ./xutils.h:31:10: fatal error: 'gdk/gdkx.h' file not found
     # #include <gdk/gdkx.h>
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/libx86/default.nix b/pkgs/development/libraries/libx86/default.nix
index 1abefa8f4374..69b4ec4a32ca 100644
--- a/pkgs/development/libraries/libx86/default.nix
+++ b/pkgs/development/libraries/libx86/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   #  http://www.mail-archive.com/suspend-devel@lists.sourceforge.net/msg02355.html
   makeFlags = [
     "DESTDIR=$(out)"
-  ] ++ lib.optional (!stdenv.isi686) "BACKEND=x86emu";
+  ] ++ lib.optional (!stdenv.hostPlatform.isi686) "BACKEND=x86emu";
 
   preBuild = ''
     sed -i lrmi.c -e 's@defined(__i386__)@(defined(__i386__) || defined(__x86_64__))@'
diff --git a/pkgs/development/libraries/libxkbcommon/default.nix b/pkgs/development/libraries/libxkbcommon/default.nix
index 6994398eaa90..9a0ebd6d59da 100644
--- a/pkgs/development/libraries/libxkbcommon/default.nix
+++ b/pkgs/development/libraries/libxkbcommon/default.nix
@@ -14,7 +14,7 @@
   # To enable the "interactive-wayland" subcommand of xkbcli. This is the
   # wayland equivalent of `xev` on X11.
 , xorg
-, withWaylandTools ? stdenv.isLinux
+, withWaylandTools ? stdenv.hostPlatform.isLinux
 , wayland
 , wayland-protocols
 , wayland-scanner
diff --git a/pkgs/development/libraries/libxklavier/default.nix b/pkgs/development/libraries/libxklavier/default.nix
index 3fa295279f0c..b6a217d9fbf8 100644
--- a/pkgs/development/libraries/libxklavier/default.nix
+++ b/pkgs/development/libraries/libxklavier/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./honor-XKB_CONFIG_ROOT.patch
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       url = "https://gitlab.freedesktop.org/archived-projects/libxklavier/-/commit/1387c21a788ec1ea203c8392ea1460fc29d83f70.patch";
       sha256 = "sha256-fyWu7sVfDv/ozjhLSLCVsv+iNFawWgJqHUsQHHSkQn4=";
diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index 82176e4fab89..66f16b11a74e 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -49,13 +49,13 @@ stdenv.mkDerivation (finalAttrs: {
     gettext
   ] ++ lib.optionals (pythonSupport && python?isPy3 && python.isPy3) [
     ncurses
-  ] ++ lib.optionals (stdenv.isDarwin && pythonSupport && python?isPy2 && python.isPy2) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && pythonSupport && python?isPy2 && python.isPy2) [
     libintl
   ];
 
   propagatedBuildInputs = [
     findXMLCatalogs
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ] ++ lib.optionals icuSupport [
     icu
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
   doCheck =
     (stdenv.hostPlatform == stdenv.buildPlatform) &&
     stdenv.hostPlatform.libc != "musl";
-  preCheck = lib.optional stdenv.isDarwin ''
+  preCheck = lib.optional stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH="$PWD/.libs:$DYLD_LIBRARY_PATH"
   '';
 
diff --git a/pkgs/development/libraries/libxslt/default.nix b/pkgs/development/libraries/libxslt/default.nix
index f86c6068e2da..34092649067c 100644
--- a/pkgs/development/libraries/libxslt/default.nix
+++ b/pkgs/development/libraries/libxslt/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [
     libxml2.dev libxcrypt
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gettext
   ] ++ lib.optionals pythonSupport [
     libxml2.py
diff --git a/pkgs/development/libraries/libxsmm/default.nix b/pkgs/development/libraries/libxsmm/default.nix
index eeb9dcf71b4a..3276354240f4 100644
--- a/pkgs/development/libraries/libxsmm/default.nix
+++ b/pkgs/development/libraries/libxsmm/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Library targeting Intel Architecture for specialized dense and sparse matrix operations, and deep learning primitives";
     mainProgram = "libxsmm_gemm_generator";
     license = licenses.bsd3;
diff --git a/pkgs/development/libraries/libyuv/default.nix b/pkgs/development/libraries/libyuv/default.nix
index 68d3b5ff2789..1062d527fa2a 100644
--- a/pkgs/development/libraries/libyuv/default.nix
+++ b/pkgs/development/libraries/libyuv/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   ];
 
   # NEON does not work on aarch64, we disable it
-  cmakeFlags = lib.optionals stdenv.isAarch64 ["-DCMAKE_CXX_FLAGS=-DLIBYUV_DISABLE_NEON"];
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isAarch64 ["-DCMAKE_CXX_FLAGS=-DLIBYUV_DISABLE_NEON"];
 
   buildInputs = [ libjpeg ];
 
diff --git a/pkgs/development/libraries/lief/default.nix b/pkgs/development/libraries/lief/default.nix
index 1f7e8fdf2c49..1e9a95bc4ed5 100644
--- a/pkgs/development/libraries/lief/default.nix
+++ b/pkgs/development/libraries/lief/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     scikit-build-core
   ];
 
-  env.CXXFLAGS = toString (lib.optional stdenv.isDarwin [ "-faligned-allocation" "-fno-aligned-new" "-fvisibility=hidden" ]);
+  env.CXXFLAGS = toString (lib.optional stdenv.hostPlatform.isDarwin [ "-faligned-allocation" "-fno-aligned-new" "-fvisibility=hidden" ]);
 
   postBuild = ''
     pushd ../api/python
diff --git a/pkgs/development/libraries/lightgbm/default.nix b/pkgs/development/libraries/lightgbm/default.nix
index 4aa28f6461e1..934b0cab5a3e 100644
--- a/pkgs/development/libraries/lightgbm/default.nix
+++ b/pkgs/development/libraries/lightgbm/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ]
-    ++ lib.optionals stdenv.isDarwin [ llvmPackages.openmp ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages.openmp ]
     ++ lib.optionals openclSupport [ opencl-headers ocl-icd boost ]
     ++ lib.optionals mpiSupport [ openmpi ]
     ++ lib.optionals hdfsSupport [ hadoop ]
diff --git a/pkgs/development/libraries/linbox/default.nix b/pkgs/development/libraries/linbox/default.nix
index ed199914e640..f9258f991361 100644
--- a/pkgs/development/libraries/linbox/default.nix
+++ b/pkgs/development/libraries/linbox/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   configureFlags = [
     "--with-blas-libs=-lblas"
     "--without-archnative"
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     # disable SIMD instructions (which are enabled *when available* by default)
     "--${if stdenv.hostPlatform.sse3Support   then "enable" else "disable"}-sse3"
     "--${if stdenv.hostPlatform.ssse3Support  then "enable" else "disable"}-ssse3"
diff --git a/pkgs/development/libraries/linenoise/default.nix b/pkgs/development/libraries/linenoise/default.nix
index a525a3da9a41..13891d08f113 100644
--- a/pkgs/development/libraries/linenoise/default.nix
+++ b/pkgs/development/libraries/linenoise/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ validatePkgConfig ]
-    ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
 
   buildPhase = ''
     runHook preBuild
diff --git a/pkgs/development/libraries/liquid-dsp/default.nix b/pkgs/development/libraries/liquid-dsp/default.nix
index 6667aa4882e0..0700b645e30a 100644
--- a/pkgs/development/libraries/liquid-dsp/default.nix
+++ b/pkgs/development/libraries/liquid-dsp/default.nix
@@ -18,10 +18,10 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-3UKAwhYaYZ42+d+wiW/AB6x5TSOel8d++d3HeZqAg/8=";
   };
 
-  configureFlags = lib.optionals stdenv.isDarwin [ "LIBTOOL=${cctools}/bin/libtool" ];
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "LIBTOOL=${cctools}/bin/libtool" ];
 
   nativeBuildInputs = [ autoreconfHook ]
-    ++ lib.optionals stdenv.isDarwin [ cctools autoSignDarwinBinariesHook fixDarwinDylibNames ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools autoSignDarwinBinariesHook fixDarwinDylibNames ];
 
   meta = {
     homepage = "https://liquidsdr.org/";
diff --git a/pkgs/development/libraries/lmdb/default.nix b/pkgs/development/libraries/lmdb/default.nix
index 7c907e9ef70f..69100b9dffd6 100644
--- a/pkgs/development/libraries/lmdb/default.nix
+++ b/pkgs/development/libraries/lmdb/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     "CC=${stdenv.cc.targetPrefix}cc"
     "AR=${stdenv.cc.targetPrefix}ar"
   ]
-    ++ lib.optional stdenv.isDarwin "LDFLAGS=-Wl,-install_name,$(out)/lib/liblmdb.so"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "LDFLAGS=-Wl,-install_name,$(out)/lib/liblmdb.so"
     ++ lib.optionals stdenv.hostPlatform.isWindows [ "SOEXT=.dll" "BINEXT=.exe" ];
 
   doCheck = true;
diff --git a/pkgs/development/libraries/loudmouth/default.nix b/pkgs/development/libraries/loudmouth/default.nix
index 21dd9db2797c..e949cd57e62e 100644
--- a/pkgs/development/libraries/loudmouth/default.nix
+++ b/pkgs/development/libraries/loudmouth/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") [
+  buildInputs = lib.optionals (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.Foundation
   ];
diff --git a/pkgs/development/libraries/mailcore2/default.nix b/pkgs/development/libraries/mailcore2/default.nix
index ed7406cc52b7..1381a48315df 100644
--- a/pkgs/development/libraries/mailcore2/default.nix
+++ b/pkgs/development/libraries/mailcore2/default.nix
@@ -19,11 +19,11 @@ stdenv.mkDerivation rec {
   buildInputs = [
     libetpan cyrus_sasl libctemplate libuchardet
     html-tidy libxml2 openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     glib
     icu
     libuuid
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
@@ -37,12 +37,12 @@ stdenv.mkDerivation rec {
       --replace buffio.h tidybuffio.h
     substituteInPlace src/core/basetypes/MCString.cpp \
       --replace "xmlErrorPtr" "const xmlError *"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace src/core/basetypes/MCICUTypes.h \
       --replace "__CHAR16_TYPE__ UChar" "char16_t UChar"
   '';
 
-  cmakeFlags = lib.optionals (!stdenv.isDarwin) [
+  cmakeFlags = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "-DBUILD_SHARED_LIBS=ON"
   ];
 
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     cp src/libMailCore.* $out/lib
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   checkPhase = ''
     (
       cd unittest
diff --git a/pkgs/development/libraries/mapnik/default.nix b/pkgs/development/libraries/mapnik/default.nix
index c41ebde0241e..7d8848f59b58 100644
--- a/pkgs/development/libraries/mapnik/default.nix
+++ b/pkgs/development/libraries/mapnik/default.nix
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
     # Use 'protozero' package.
     (lib.cmakeBool "USE_EXTERNAL_MAPBOX_PROTOZERO" true)
     # macOS builds fail when using memory mapped file cache.
-    (lib.cmakeBool "USE_MEMORY_MAPPED_FILE" (!stdenv.isDarwin))
+    (lib.cmakeBool "USE_MEMORY_MAPPED_FILE" (!stdenv.hostPlatform.isDarwin))
   ];
 
   doCheck = true;
diff --git a/pkgs/development/libraries/matrix-sdk-crypto-nodejs/generic.nix b/pkgs/development/libraries/matrix-sdk-crypto-nodejs/generic.nix
index 63e9861421ab..c0b068499cd3 100644
--- a/pkgs/development/libraries/matrix-sdk-crypto-nodejs/generic.nix
+++ b/pkgs/development/libraries/matrix-sdk-crypto-nodejs/generic.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
     nodejs
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   buildPhase = ''
     runHook preBuild
diff --git a/pkgs/development/libraries/medfile/default.nix b/pkgs/development/libraries/medfile/default.nix
index 8c07b2aad31a..296317788d21 100644
--- a/pkgs/development/libraries/medfile/default.nix
+++ b/pkgs/development/libraries/medfile/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
     substituteInPlace src/*/*.c --replace-warn \
       "#if H5_VERS_MINOR > 12" \
       "#if H5_VERS_MINOR > 14"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Some medfile test files #define _a, which
     # breaks system header files that use _a as a function parameter
     substituteInPlace tests/c/*.c \
diff --git a/pkgs/development/libraries/memorymapping/default.nix b/pkgs/development/libraries/memorymapping/default.nix
index 91af205f0320..1b3c17bc4f8c 100644
--- a/pkgs/development/libraries/memorymapping/default.nix
+++ b/pkgs/development/libraries/memorymapping/default.nix
@@ -40,6 +40,6 @@ stdenv.mkDerivation {
     # Uses BSD-style funopen() to implement glibc-style fmemopen().
     # Add more BSDs if you need to.
     platforms = platforms.darwin;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/libraries/mesa-glu/default.nix b/pkgs/development/libraries/mesa-glu/default.nix
index 138e7f247c13..bbcc0bb99a0e 100644
--- a/pkgs/development/libraries/mesa-glu/default.nix
+++ b/pkgs/development/libraries/mesa-glu/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs = [ "out" "dev" ];
 
-  mesonFlags = lib.optionals stdenv.isDarwin [
+  mesonFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-Dgl_provider=gl" # glvnd is default
   ];
 
diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index 94a72143a71f..80eacadd879d 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -55,13 +55,13 @@
     "svga" # VMWare virtualized GPU
     "virgl" # QEMU virtualized GPU (aka VirGL)
     "zink" # generic OpenGL over Vulkan, experimental
-  ] ++ lib.optionals (stdenv.isAarch64 || stdenv.isAarch32) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isAarch32) [
     "etnaviv" # Vivante GPU designs (mostly NXP/Marvell SoCs)
     "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
     "lima" # ARM Mali 4xx
     "panfrost" # ARM Mali Midgard and up (T/G series)
     "vc4" # Broadcom VC4 (Raspberry Pi 0-3)
-  ] ++ lib.optionals stdenv.isAarch64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
     "tegra" # Nvidia Tegra SoCs
     "v3d" # Broadcom VC5 (Raspberry Pi 4)
   ] ++ lib.optionals stdenv.hostPlatform.isx86 [
@@ -78,7 +78,7 @@
     # QEMU virtualized GPU (aka VirGL)
     # Requires ATOMIC_INT_LOCK_FREE == 2.
     "virtio"
-  ] ++ lib.optionals stdenv.isAarch64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
     "broadcom" # Broadcom VC5 (Raspberry Pi 4, aka V3D)
     "freedreno" # Qualcomm Adreno (all Qualcomm SoCs)
     "imagination-experimental" # PowerVR Rogue (currently N/A)
@@ -203,7 +203,7 @@ in stdenv.mkDerivation {
 
     # Enable Intel RT stuff when available
     (lib.mesonBool "install-intel-clc" true)
-    (lib.mesonEnable "intel-rt" stdenv.isx86_64)
+    (lib.mesonEnable "intel-rt" stdenv.hostPlatform.isx86_64)
     (lib.mesonOption "clang-libdir" "${llvmPackages.clang-unwrapped.lib}/lib")
 
     # Clover, old OpenCL frontend
diff --git a/pkgs/development/libraries/mimalloc/default.nix b/pkgs/development/libraries/mimalloc/default.nix
index 29fd2b662e69..e8259541c27a 100644
--- a/pkgs/development/libraries/mimalloc/default.nix
+++ b/pkgs/development/libraries/mimalloc/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   doCheck = !stdenv.hostPlatform.isStatic;
   preCheck = let
-    ldLibraryPathEnv = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+    ldLibraryPathEnv = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
   in ''
     export ${ldLibraryPathEnv}="$(pwd)/build:''${${ldLibraryPathEnv}}"
   '';
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   postInstall = let
     rel = lib.versions.majorMinor version;
-    suffix = if stdenv.isLinux then "${soext}.${rel}" else ".${rel}${soext}";
+    suffix = if stdenv.hostPlatform.isLinux then "${soext}.${rel}" else ".${rel}${soext}";
   in ''
     # first, move headers and cmake files, that's easy
     mkdir -p $dev/lib
diff --git a/pkgs/development/libraries/mimetic/default.nix b/pkgs/development/libraries/mimetic/default.nix
index 668b2fdf10c9..33b6e1b8cae8 100644
--- a/pkgs/development/libraries/mimetic/default.nix
+++ b/pkgs/development/libraries/mimetic/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
       url = "https://github.com/tat/mimetic/commit/bf84940f9021950c80846e6b1a5f8b0b55991b00.patch";
       sha256 = "sha256-1JW9zPg67BgNsdIjK/jp9j7QMg50eRMz5FsDsbbzBlI=";
     })
-  ] ++ lib.optional stdenv.isAarch64 ./narrowing.patch;
+  ] ++ lib.optional stdenv.hostPlatform.isAarch64 ./narrowing.patch;
 
   meta = with lib; {
     description = "MIME handling library";
diff --git a/pkgs/development/libraries/minixml/default.nix b/pkgs/development/libraries/minixml/default.nix
index ebb0f2889738..3438cb9290b6 100644
--- a/pkgs/development/libraries/minixml/default.nix
+++ b/pkgs/development/libraries/minixml/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   # remove the -arch flags which are set by default in the build
-  configureFlags = lib.optionals stdenv.isDarwin [
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--with-archflags=\"-mmacosx-version-min=10.14\""
   ];
 
diff --git a/pkgs/development/libraries/minizip-ng/default.nix b/pkgs/development/libraries/minizip-ng/default.nix
index fde280137e74..b15997cb436b 100644
--- a/pkgs/development/libraries/minizip-ng/default.nix
+++ b/pkgs/development/libraries/minizip-ng/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DMZ_BUILD_TESTS=${if finalAttrs.finalPackage.doCheck then "ON" else "OFF"}"
     "-DMZ_BUILD_UNIT_TESTS=${if finalAttrs.finalPackage.doCheck then "ON" else "OFF"}"
     "-DMZ_LIB_SUFFIX='-ng'"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # missing header file
     "-DMZ_LIBCOMP=OFF"
   ];
diff --git a/pkgs/development/libraries/mlt/default.nix b/pkgs/development/libraries/mlt/default.nix
index 2ca4e6b46dc1..d1cd9d068913 100644
--- a/pkgs/development/libraries/mlt/default.nix
+++ b/pkgs/development/libraries/mlt/default.nix
@@ -23,7 +23,7 @@
 , darwin
 , cudaSupport ? config.cudaSupport
 , cudaPackages ? { }
-, enableJackrack ? stdenv.isLinux
+, enableJackrack ? stdenv.hostPlatform.isLinux
 , glib
 , ladspa-sdk
 , ladspaPlugins
@@ -31,7 +31,7 @@
 , python3
 , swig
 , qt ? null
-, enableSDL1 ? stdenv.isLinux
+, enableSDL1 ? stdenv.hostPlatform.isLinux
 , SDL
 , enableSDL2 ? true
 , SDL2
@@ -83,7 +83,7 @@ stdenv.mkDerivation rec {
     rubberband
     sox
     vid-stab
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Accelerate
   ] ++ lib.optionals cudaSupport [
     cudaPackages.cuda_cudart
diff --git a/pkgs/development/libraries/mongoc/default.nix b/pkgs/development/libraries/mongoc/default.nix
index 802226c46f8a..fc967445d01c 100644
--- a/pkgs/development/libraries/mongoc/default.nix
+++ b/pkgs/development/libraries/mongoc/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     icu
     cyrus_sasl
     snappy
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Security
   ];
 
diff --git a/pkgs/development/libraries/mongocxx/default.nix b/pkgs/development/libraries/mongocxx/default.nix
index 5659043e2f62..415e7ca96e3a 100644
--- a/pkgs/development/libraries/mongocxx/default.nix
+++ b/pkgs/development/libraries/mongocxx/default.nix
@@ -10,7 +10,7 @@
 , darwin
 }:
 
-let stdenv = if pkgs.stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else pkgs.stdenv; in
+let stdenv = if pkgs.stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else pkgs.stdenv; in
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "mongocxx";
@@ -38,7 +38,7 @@ stdenv.mkDerivation (finalAttrs: {
     mongoc
     openssl
     cyrus_sasl
-  ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
   cmakeFlags = [
     "-DCMAKE_CXX_STANDARD=20"
diff --git a/pkgs/development/libraries/movit/default.nix b/pkgs/development/libraries/movit/default.nix
index d2cd26f38bf6..55a4ec26025a 100644
--- a/pkgs/development/libraries/movit/default.nix
+++ b/pkgs/development/libraries/movit/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     SDL2
     fftw
     gtest
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.OpenGL
     darwin.libobjc
   ];
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     libepoxy
   ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_LDFLAGS = "-framework OpenGL";
   };
 
diff --git a/pkgs/development/libraries/mpich/default.nix b/pkgs/development/libraries/mpich/default.nix
index a4716a47bb1b..4af559b50758 100644
--- a/pkgs/development/libraries/mpich/default.nix
+++ b/pkgs/development/libraries/mpich/default.nix
@@ -44,12 +44,12 @@ stdenv.mkDerivation  rec {
 
   nativeBuildInputs = [ gfortran python3 ];
   buildInputs = [ perl openssh hwloc ]
-    ++ lib.optional (!stdenv.isDarwin) ch4backend
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) ch4backend
     ++ lib.optional pmixSupport pmix
-    ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Foundation;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Foundation;
 
   # test_double_serializer.test fails on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preFixup = ''
     # Ensure the default compilers are the ones mpich was built with
diff --git a/pkgs/development/libraries/mpir/default.nix b/pkgs/development/libraries/mpir/default.nix
index 26f22fd9968f..9857317ea188 100644
--- a/pkgs/development/libraries/mpir/default.nix
+++ b/pkgs/development/libraries/mpir/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   ];
 
   configureFlags = [ "--enable-cxx" ]
-    ++ lib.optionals stdenv.isLinux [ "--enable-fat" ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ "--enable-fat" ];
 
   meta = {
     description = "Highly optimised library for bignum arithmetic forked from GMP";
diff --git a/pkgs/development/libraries/mvfst/default.nix b/pkgs/development/libraries/mvfst/default.nix
index 0a784fff339a..7c9d2e8da445 100644
--- a/pkgs/development/libraries/mvfst/default.nix
+++ b/pkgs/development/libraries/mvfst/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
diff --git a/pkgs/development/libraries/mygui/default.nix b/pkgs/development/libraries/mygui/default.nix
index c785e640ccb0..d52eadbba6cd 100644
--- a/pkgs/development/libraries/mygui/default.nix
+++ b/pkgs/development/libraries/mygui/default.nix
@@ -45,12 +45,12 @@ stdenv.mkDerivation rec {
     ois
   ] ++ lib.optionals withOgre [
     ogre
-  ] ++ lib.optionals (!withOgre && stdenv.isLinux) [
+  ] ++ lib.optionals (!withOgre && stdenv.hostPlatform.isLinux) [
     libGL
     libGLU
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ];
 
diff --git a/pkgs/development/libraries/ncnn/default.nix b/pkgs/development/libraries/ncnn/default.nix
index ae82d0490be4..f431133c2505 100644
--- a/pkgs/development/libraries/ncnn/default.nix
+++ b/pkgs/development/libraries/ncnn/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     "-DNCNN_PYTHON=0" # Should be an attribute
   ]
   # Requires setting `Vulkan_LIBRARY` on Darwin. Otherwise the build fails due to missing symbols.
-  ++ lib.optionals stdenv.isDarwin [ "-DVulkan_LIBRARY=-lvulkan" ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-DVulkan_LIBRARY=-lvulkan" ];
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ vulkan-headers vulkan-loader glslang opencv protobuf ];
diff --git a/pkgs/development/libraries/nco/default.nix b/pkgs/development/libraries/nco/default.nix
index 1b5dced4e81a..3affdfbf5743 100644
--- a/pkgs/development/libraries/nco/default.nix
+++ b/pkgs/development/libraries/nco/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation (finalAttrs: {
       --replace "/bin/mv" "${coreutils}/bin/mv"
   '';
 
-  makeFlags = lib.optionals stdenv.isDarwin [ "LIBTOOL=${libtool}/bin/libtool" ];
+  makeFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "LIBTOOL=${libtool}/bin/libtool" ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/ncurses/default.nix b/pkgs/development/libraries/ncurses/default.nix
index 95b427a7bad3..2a4e89d7f3df 100644
--- a/pkgs/development/libraries/ncurses/default.nix
+++ b/pkgs/development/libraries/ncurses/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation (finalAttrs: {
   ]);
 
   # Only the C compiler, and explicitly not C++ compiler needs this flag on solaris:
-  CFLAGS = lib.optionalString stdenv.isSunOS "-D_XOPEN_SOURCE_EXTENDED";
+  CFLAGS = lib.optionalString stdenv.hostPlatform.isSunOS "-D_XOPEN_SOURCE_EXTENDED";
 
   strictDeps = true;
 
@@ -77,7 +77,7 @@ stdenv.mkDerivation (finalAttrs: {
     ncurses
   ];
 
-  buildInputs = lib.optional (mouseSupport && stdenv.isLinux) gpm;
+  buildInputs = lib.optional (mouseSupport && stdenv.hostPlatform.isLinux) gpm;
 
   preConfigure = ''
     export PKG_CONFIG_LIBDIR="$dev/lib/pkgconfig"
@@ -90,7 +90,7 @@ stdenv.mkDerivation (finalAttrs: {
       "--with-pkg-config-libdir=$PKG_CONFIG_LIBDIR"
     )
   ''
-  + lib.optionalString stdenv.isSunOS ''
+  + lib.optionalString stdenv.hostPlatform.isSunOS ''
     sed -i -e '/-D__EXTENSIONS__/ s/-D_XOPEN_SOURCE=\$cf_XOPEN_SOURCE//' \
            -e '/CPPFLAGS="$CPPFLAGS/s/ -D_XOPEN_SOURCE_EXTENDED//' \
         configure
@@ -102,7 +102,7 @@ stdenv.mkDerivation (finalAttrs: {
   doCheck = false;
 
   postFixup = let
-    abiVersion-extension = if stdenv.isDarwin then "${abiVersion}.$dylibtype" else "$dylibtype.${abiVersion}"; in
+    abiVersion-extension = if stdenv.hostPlatform.isDarwin then "${abiVersion}.$dylibtype" else "$dylibtype.${abiVersion}"; in
   ''
     # Determine what suffixes our libraries have
     suffix="$(awk -F': ' 'f{print $3; f=0} /default library suffix/{f=1}' config.log)"
diff --git a/pkgs/development/libraries/ndi/default.nix b/pkgs/development/libraries/ndi/default.nix
index b691f2b10afa..78a4f808b4c3 100644
--- a/pkgs/development/libraries/ndi/default.nix
+++ b/pkgs/development/libraries/ndi/default.nix
@@ -3,10 +3,10 @@
 let
   versionJSON = lib.importJSON ./version.json;
   ndiPlatform =
-    if stdenv.isAarch64 then "aarch64-rpi4-linux-gnueabi"
-    else if stdenv.isAarch32 then "arm-rpi2-linux-gnueabihf"
-    else if stdenv.isx86_64 then "x86_64-linux-gnu"
-    else if stdenv.isi686 then "i686-linux-gnu"
+    if stdenv.hostPlatform.isAarch64 then "aarch64-rpi4-linux-gnueabi"
+    else if stdenv.hostPlatform.isAarch32 then "arm-rpi2-linux-gnueabihf"
+    else if stdenv.hostPlatform.isx86_64 then "x86_64-linux-gnu"
+    else if stdenv.hostPlatform.isi686 then "i686-linux-gnu"
     else throw "unsupported platform for NDI SDK";
 in
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/neon/default.nix b/pkgs/development/libraries/neon/default.nix
index 3185ff4158ee..6bff584ddaef 100644
--- a/pkgs/development/libraries/neon/default.nix
+++ b/pkgs/development/libraries/neon/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-SHLhL4Alct7dSwL4cAZYFLLVFB99va9wju2rgmtRpYo=";
   };
 
-  patches = optionals stdenv.isDarwin [ ./darwin-fix-configure.patch ];
+  patches = optionals stdenv.hostPlatform.isDarwin [ ./darwin-fix-configure.patch ];
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [libxml2 openssl bash]
diff --git a/pkgs/development/libraries/netcdf-cxx4/default.nix b/pkgs/development/libraries/netcdf-cxx4/default.nix
index 08f812a272a2..606e8a86b0c3 100644
--- a/pkgs/development/libraries/netcdf-cxx4/default.nix
+++ b/pkgs/development/libraries/netcdf-cxx4/default.nix
@@ -34,6 +34,6 @@ stdenv.mkDerivation rec {
     homepage = "https://www.unidata.ucar.edu/software/netcdf/";
     license = lib.licenses.free;
     platforms = lib.platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/netcdf-fortran/default.nix b/pkgs/development/libraries/netcdf-fortran/default.nix
index 0edc956eee60..d9a80768bb61 100644
--- a/pkgs/development/libraries/netcdf-fortran/default.nix
+++ b/pkgs/development/libraries/netcdf-fortran/default.nix
@@ -12,12 +12,12 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ gfortran ];
   buildInputs = [ netcdf hdf5 curl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       CoreServices
       SystemConfiguration
     ];
-  env.NIX_LDFLAGS = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_LDFLAGS = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-F${CoreServices}/Library/Frameworks"
     "-F${SystemConfiguration}/Library/Frameworks"
   ]);
diff --git a/pkgs/development/libraries/nettle/generic.nix b/pkgs/development/libraries/nettle/generic.nix
index 44afdf45513f..b1cf1f5f6bfe 100644
--- a/pkgs/development/libraries/nettle/generic.nix
+++ b/pkgs/development/libraries/nettle/generic.nix
@@ -23,9 +23,9 @@ stdenv.mkDerivation {
     # /usr/include/mp.h from OpenSolaris.  See
     # <https://lists.gnu.org/archive/html/hydra-users/2012-08/msg00000.html>
     # for details.
-    ++ lib.optional stdenv.isSunOS "--with-include-path=${gmp.dev}/include";
+    ++ lib.optional stdenv.hostPlatform.isSunOS "--with-include-path=${gmp.dev}/include";
 
-  doCheck = (stdenv.hostPlatform.system != "i686-cygwin" && !stdenv.isDarwin);
+  doCheck = (stdenv.hostPlatform.system != "i686-cygwin" && !stdenv.hostPlatform.isDarwin);
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/newt/default.nix b/pkgs/development/libraries/newt/default.nix
index 15a834709806..d8adcf63b19d 100644
--- a/pkgs/development/libraries/newt/default.nix
+++ b/pkgs/development/libraries/newt/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     unset CPP
   '';
 
-  configureFlags = lib.optionals stdenv.isDarwin [
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--disable-nls"
   ];
 
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     "CROSS_COMPILE=${stdenv.cc.targetPrefix}"
   ];
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libnewt.so.${version} $out/lib/libnewt.so.${version}
     install_name_tool -change libnewt.so.${version} $out/lib/libnewt.so.${version} $out/bin/whiptail
   '';
diff --git a/pkgs/development/libraries/nghttp2/default.nix b/pkgs/development/libraries/nghttp2/default.nix
index fbe3e2a92f15..19265cbe1608 100644
--- a/pkgs/development/libraries/nghttp2/default.nix
+++ b/pkgs/development/libraries/nghttp2/default.nix
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     (lib.enableFeature enableHttp3 "http3")
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13") [
     "-faligned-allocation"
   ]);
 
diff --git a/pkgs/development/libraries/nghttp3/default.nix b/pkgs/development/libraries/nghttp3/default.nix
index 2a264dbe6c46..a32538560177 100644
--- a/pkgs/development/libraries/nghttp3/default.nix
+++ b/pkgs/development/libraries/nghttp3/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" "doc" ];
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/development/libraries/ngtcp2/default.nix b/pkgs/development/libraries/ngtcp2/default.nix
index 8e17a3394dc3..aa5ebc6fbb8b 100644
--- a/pkgs/development/libraries/ngtcp2/default.nix
+++ b/pkgs/development/libraries/ngtcp2/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     libev
     nghttp3
     quictls
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ] ++ lib.optional withJemalloc jemalloc;
 
diff --git a/pkgs/development/libraries/ngtcp2/gnutls.nix b/pkgs/development/libraries/ngtcp2/gnutls.nix
index 1cf06ecb837f..31f69e82198f 100644
--- a/pkgs/development/libraries/ngtcp2/gnutls.nix
+++ b/pkgs/development/libraries/ngtcp2/gnutls.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
   nativeCheckInputs = [ cunit ]
-    ++ lib.optional stdenv.isDarwin ncurses;
+    ++ lib.optional stdenv.hostPlatform.isDarwin ncurses;
 
   passthru.tests = knot-dns.passthru.tests; # the only consumer so far
 
diff --git a/pkgs/development/libraries/nlopt/default.nix b/pkgs/development/libraries/nlopt/default.nix
index 2fae17a23236..4995d98adca7 100644
--- a/pkgs/development/libraries/nlopt/default.nix
+++ b/pkgs/development/libraries/nlopt/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-TgieCX7yUdTAEblzXY/gCN0r6F9TVDh4RdNDjQdXZ1o=";
   };
 
-  nativeBuildInputs = [ cmake ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  nativeBuildInputs = [ cmake ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
   buildInputs = [ octave ];
 
   configureFlags = [
diff --git a/pkgs/development/libraries/nspr/default.nix b/pkgs/development/libraries/nspr/default.nix
index 586c4ddb94fc..efea4a4cc81f 100644
--- a/pkgs/development/libraries/nspr/default.nix
+++ b/pkgs/development/libraries/nspr/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   preConfigure = ''
     cd nspr
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace '@executable_path/' "$out/lib/"
     substituteInPlace configure.in --replace '@executable_path/' "$out/lib/"
   '';
@@ -34,14 +34,14 @@ stdenv.mkDerivation rec {
   configureFlags = [
     "--enable-optimize"
     "--disable-debug"
-  ] ++ lib.optional stdenv.is64bit "--enable-64bit";
+  ] ++ lib.optional stdenv.hostPlatform.is64bit "--enable-64bit";
 
   postInstall = ''
     find $out -name "*.a" -delete
     moveToOutput share "$dev" # just aclocal
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/nss/generic.nix b/pkgs/development/libraries/nss/generic.nix
index 7ef488cca4c1..9e54ddda866f 100644
--- a/pkgs/development/libraries/nss/generic.nix
+++ b/pkgs/development/libraries/nss/generic.nix
@@ -93,7 +93,7 @@ stdenv.mkDerivation rec {
         --enable-libpkix \
         -j $NIX_BUILD_CORES \
         ${lib.optionalString enableFIPS "--enable-fips"} \
-        ${lib.optionalString stdenv.isDarwin "--clang"} \
+        ${lib.optionalString stdenv.hostPlatform.isDarwin "--clang"} \
         ${lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) "--disable-tests"}
 
       runHook postBuild
@@ -155,7 +155,7 @@ stdenv.mkDerivation rec {
     (lib.optionalString enableFIPS (''
       for libname in freebl3 nssdbm3 softokn3
       do libfile="$out/lib/lib$libname${stdenv.hostPlatform.extensions.sharedLibrary}"'' +
-    (if stdenv.isDarwin
+    (if stdenv.hostPlatform.isDarwin
     then ''
       DYLD_LIBRARY_PATH=$out/lib:${nspr.out}/lib \
     '' else ''
diff --git a/pkgs/development/libraries/nss_wrapper/default.nix b/pkgs/development/libraries/nss_wrapper/default.nix
index 9bec1886abb6..378ebf54c1f7 100644
--- a/pkgs/development/libraries/nss_wrapper/default.nix
+++ b/pkgs/development/libraries/nss_wrapper/default.nix
@@ -17,6 +17,6 @@ stdenv.mkDerivation rec {
     homepage = "https://git.samba.org/?p=nss_wrapper.git;a=summary;";
     license = licenses.bsd3;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/ntbtls/default.nix b/pkgs/development/libraries/ntbtls/default.nix
index e04d2ae43537..e1726a874fcd 100644
--- a/pkgs/development/libraries/ntbtls/default.nix
+++ b/pkgs/development/libraries/ntbtls/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   outputs = [ "dev" "out" ];
 
   buildInputs = [ libgcrypt libgpg-error libksba zlib ]
-    ++ lib.optional stdenv.isDarwin gettext;
+    ++ lib.optional stdenv.hostPlatform.isDarwin gettext;
 
   postInstall = ''
     moveToOutput "bin/ntbtls-config" $dev
diff --git a/pkgs/development/libraries/numcpp/default.nix b/pkgs/development/libraries/numcpp/default.nix
index b8dea0f3662b..34dd82c15076 100644
--- a/pkgs/development/libraries/numcpp/default.nix
+++ b/pkgs/development/libraries/numcpp/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DBUILD_MULTIPLE_TEST=ON"
   ];
 
-  doCheck = !stdenv.isDarwin && !stdenv.hostPlatform.isStatic;
+  doCheck = !stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isStatic;
 
   postInstall = ''
     substituteInPlace $out/share/NumCpp/cmake/NumCppConfig.cmake \
diff --git a/pkgs/development/libraries/oatpp/default.nix b/pkgs/development/libraries/oatpp/default.nix
index 54e821b17848..10b44bdac572 100644
--- a/pkgs/development/libraries/oatpp/default.nix
+++ b/pkgs/development/libraries/oatpp/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   # Tests fail on darwin. See https://github.com/NixOS/nixpkgs/pull/105419#issuecomment-735826894
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://oatpp.io/";
diff --git a/pkgs/development/libraries/ode/default.nix b/pkgs/development/libraries/ode/default.nix
index 8b426654147f..2906c3428342 100644
--- a/pkgs/development/libraries/ode/default.nix
+++ b/pkgs/development/libraries/ode/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-uode3RZFcJWHle6qcPFIU7/DTMmHH4rd6NpH4SvVRnk=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.GLUT
   ];
diff --git a/pkgs/development/libraries/odpic/default.nix b/pkgs/development/libraries/odpic/default.nix
index 92b943dbdf2f..831c8a4e2afd 100644
--- a/pkgs/development/libraries/odpic/default.nix
+++ b/pkgs/development/libraries/odpic/default.nix
@@ -17,19 +17,19 @@ stdenv.mkDerivation {
     sha256 = "sha256-Ez9B89I008YMu1s/8J0V4bydkooth+O5846Fmwl4FsA=";
   };
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   buildInputs = [ oracle-instantclient ]
-    ++ lib.optionals stdenv.isLinux [ libaio ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libaio ];
 
   dontPatchELF = true;
   makeFlags = [ "PREFIX=$(out)" "CC=${stdenv.cc.targetPrefix}cc" "LD=${stdenv.cc.targetPrefix}cc" ];
 
   postFixup = ''
-    ${lib.optionalString (stdenv.isLinux) ''
+    ${lib.optionalString (stdenv.hostPlatform.isLinux) ''
       patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $out/lib/libodpic${stdenv.hostPlatform.extensions.sharedLibrary})" $out/lib/libodpic${stdenv.hostPlatform.extensions.sharedLibrary}
     ''}
-    ${lib.optionalString (stdenv.isDarwin) ''
+    ${lib.optionalString (stdenv.hostPlatform.isDarwin) ''
       install_name_tool -add_rpath "${libPath}" $out/lib/libodpic${stdenv.hostPlatform.extensions.sharedLibrary}
     ''}
   '';
diff --git a/pkgs/development/libraries/ogre/default.nix b/pkgs/development/libraries/ogre/default.nix
index c977348e587a..0643fabdd8c6 100644
--- a/pkgs/development/libraries/ogre/default.nix
+++ b/pkgs/development/libraries/ogre/default.nix
@@ -74,7 +74,7 @@ let
       ois
       pugixml
       zziplib
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       libglut
       libGL
       libGLU
@@ -88,7 +88,7 @@ let
       libXt
       libXxf86vm
       xorgproto
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Cocoa
     ] ++ lib.optionals withNvidiaCg [
       nvidia_cg_toolkit
@@ -97,7 +97,7 @@ let
     cmakeFlags = [
       (lib.cmakeBool "OGRE_BUILD_DEPENDENCIES" false)
       (lib.cmakeBool "OGRE_BUILD_SAMPLES" withSamples)
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       (lib.cmakeBool "OGRE_BUILD_LIBS_AS_FRAMEWORKS" false)
     ];
 
diff --git a/pkgs/development/libraries/ois/default.nix b/pkgs/development/libraries/ois/default.nix
index 0a384b03bb2a..435509dee216 100644
--- a/pkgs/development/libraries/ois/default.nix
+++ b/pkgs/development/libraries/ois/default.nix
@@ -13,8 +13,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ libX11 ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa IOKit Kernel ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libX11 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa IOKit Kernel ];
 
   cmakeFlags = [
     "-DCMAKE_INSTALL_LIBDIR=lib"
diff --git a/pkgs/development/libraries/okapi/default.nix b/pkgs/development/libraries/okapi/default.nix
index b7a75ad6d1b9..06f980e718c8 100644
--- a/pkgs/development/libraries/okapi/default.nix
+++ b/pkgs/development/libraries/okapi/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
   cargoVendorDir = "vendor";
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     cp -r include $out
diff --git a/pkgs/development/libraries/omorfi/default.nix b/pkgs/development/libraries/omorfi/default.nix
index 6002ea464673..9360b0fdd104 100644
--- a/pkgs/development/libraries/omorfi/default.nix
+++ b/pkgs/development/libraries/omorfi/default.nix
@@ -87,6 +87,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3;
     maintainers = with maintainers; [ lurkki ];
     # Darwin build fails due to hfst not being found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/development/libraries/onnxruntime/default.nix b/pkgs/development/libraries/onnxruntime/default.nix
index bb344664e659..9ac43cc4b1d3 100644
--- a/pkgs/development/libraries/onnxruntime/default.nix
+++ b/pkgs/development/libraries/onnxruntime/default.nix
@@ -149,7 +149,7 @@ effectiveStdenv.mkDerivation rec {
     numpy
     pybind11
     packaging
-  ]) ++ lib.optionals effectiveStdenv.isDarwin [
+  ]) ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [
     Foundation
     libiconv
   ] ++ lib.optionals cudaSupport (with cudaPackages; [
diff --git a/pkgs/development/libraries/openal-soft/default.nix b/pkgs/development/libraries/openal-soft/default.nix
index 496b7ac60fe0..15a33af177ce 100644
--- a/pkgs/development/libraries/openal-soft/default.nix
+++ b/pkgs/development/libraries/openal-soft/default.nix
@@ -1,8 +1,8 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkg-config, removeReferencesTo
-, alsaSupport ? !stdenv.isDarwin, alsa-lib
-, dbusSupport ? !stdenv.isDarwin, dbus
-, pipewireSupport ? !stdenv.isDarwin, pipewire
-, pulseSupport ? !stdenv.isDarwin, libpulseaudio
+, alsaSupport ? !stdenv.hostPlatform.isDarwin, alsa-lib
+, dbusSupport ? !stdenv.hostPlatform.isDarwin, dbus
+, pipewireSupport ? !stdenv.hostPlatform.isDarwin, pipewire
+, pulseSupport ? !stdenv.hostPlatform.isDarwin, libpulseaudio
 , CoreServices, AudioUnit, AudioToolbox
 }:
 
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional dbusSupport dbus
     ++ lib.optional pipewireSupport pipewire
     ++ lib.optional pulseSupport libpulseaudio
-    ++ lib.optionals stdenv.isDarwin [ CoreServices AudioUnit AudioToolbox ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices AudioUnit AudioToolbox ];
 
   cmakeFlags = [
     # Automatically links dependencies without having to rely on dlopen, thus
diff --git a/pkgs/development/libraries/openbsm/default.nix b/pkgs/development/libraries/openbsm/default.nix
index f30fcac869f1..32d7bf074384 100644
--- a/pkgs/development/libraries/openbsm/default.nix
+++ b/pkgs/development/libraries/openbsm/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0b98359hd8mm585sh145ss828pg2y8vgz38lqrb7nypapiyqdnd1";
   };
 
-  patches = lib.optionals stdenv.isDarwin [ ./bsm-add-audit_token_to_pid.patch ];
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [ ./bsm-add-audit_token_to_pid.patch ];
 
   preConfigure = lib.optionalString (lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
     MACOSX_DEPLOYMENT_TARGET=10.16
diff --git a/pkgs/development/libraries/opencascade-occt/default.nix b/pkgs/development/libraries/opencascade-occt/default.nix
index a09cacaf3928..e9f3e0794d33 100644
--- a/pkgs/development/libraries/opencascade-occt/default.nix
+++ b/pkgs/development/libraries/opencascade-occt/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     libXext
     libXmu
     libXi
-  ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Cocoa;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Cocoa;
 
   meta = with lib; {
     description = "Open CASCADE Technology, libraries for 3D modeling and numerical simulation";
diff --git a/pkgs/development/libraries/opencl-clang/default.nix b/pkgs/development/libraries/opencl-clang/default.nix
index 341c3f3ecf57..a4d2f115cc67 100644
--- a/pkgs/development/libraries/opencl-clang/default.nix
+++ b/pkgs/development/libraries/opencl-clang/default.nix
@@ -73,7 +73,7 @@ let
       # fix not be able to find clang from PATH
       substituteInPlace cl_headers/CMakeLists.txt \
         --replace " NO_DEFAULT_PATH" ""
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Uses linker flags that are not supported on Darwin.
       sed -i -e '/SET_LINUX_EXPORTS_FILE/d' CMakeLists.txt
       substituteInPlace CMakeLists.txt \
@@ -107,6 +107,6 @@ stdenv.mkDerivation {
     maintainers = [ ];
     platforms = platforms.all;
     # error: invalid value 'CL3.0' in '-cl-std=CL3.0'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/opencollada/default.nix b/pkgs/development/libraries/opencollada/default.nix
index 6ecb76c0eed7..67f18a4a2718 100644
--- a/pkgs/development/libraries/opencollada/default.nix
+++ b/pkgs/development/libraries/opencollada/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake pkg-config ];
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ AGL ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ AGL ]);
 
   propagatedBuildInputs = [ libxml2 pcre ];
 
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     # Drop blanket -Werror as it tends to fail on newer toolchain for
     # minor warnings. In this case it was gcc-13 build failure.
     substituteInPlace DAEValidator/CMakeLists.txt --replace-fail ' -Werror"' '"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace GeneratedSaxParser/src/GeneratedSaxParserUtils.cpp \
       --replace math.h cmath
   '';
diff --git a/pkgs/development/libraries/opencolorio/1.x.nix b/pkgs/development/libraries/opencolorio/1.x.nix
index 63098028fc64..7d1839163efc 100644
--- a/pkgs/development/libraries/opencolorio/1.x.nix
+++ b/pkgs/development/libraries/opencolorio/1.x.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   # TODO: Investigate whether git can be dropped: It's only used to apply patches
   nativeBuildInputs = [ cmake pkg-config git ];
 
-  buildInputs = [ lcms2 tinyxml ] ++ lib.optional stdenv.isDarwin boost;
+  buildInputs = [ lcms2 tinyxml ] ++ lib.optional stdenv.hostPlatform.isDarwin boost;
 
   postPatch = ''
     substituteInPlace src/core/CMakeLists.txt --replace "-Werror" ""
@@ -28,9 +28,9 @@ stdenv.mkDerivation rec {
     "-DUSE_EXTERNAL_TINYXML=ON"
     # External yaml-cpp 0.6.* not compatible: https://github.com/imageworks/OpenColorIO/issues/517
     "-DUSE_EXTERNAL_YAML=OFF"
-  ] ++ lib.optional stdenv.isDarwin "-DOCIO_USE_BOOST_PTR=ON"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "-DOCIO_USE_BOOST_PTR=ON"
     ++ lib.optional (!stdenv.hostPlatform.isx86) "-DOCIO_USE_SSE=OFF"
-    ++ lib.optional (stdenv.isDarwin && stdenv.isAarch64) "-DCMAKE_OSX_ARCHITECTURES=arm64";
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-DCMAKE_OSX_ARCHITECTURES=arm64";
 
   postInstall = ''
     moveToOutput bin "$bin"
diff --git a/pkgs/development/libraries/opencolorio/default.nix b/pkgs/development/libraries/opencolorio/default.nix
index 3e9302e025f2..76d2b06150ad 100644
--- a/pkgs/development/libraries/opencolorio/default.nix
+++ b/pkgs/development/libraries/opencolorio/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     ./line-numbers.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # these tests don't like being run headless on darwin. no builtin
     # way of skipping tests so this is what we're reduced to.
     substituteInPlace tests/cpu/Config_tests.cpp \
@@ -75,7 +75,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional (!buildApps) "-DOCIO_BUILD_APPS=OFF";
 
   # precision issues on non-x86
-  doCheck = stdenv.isx86_64;
+  doCheck = stdenv.hostPlatform.isx86_64;
   # Tends to fail otherwise.
   enableParallelChecking = false;
 
diff --git a/pkgs/development/libraries/opencsg/default.nix b/pkgs/development/libraries/opencsg/default.nix
index 6ac83dfa7d92..5aea0da27380 100644
--- a/pkgs/development/libraries/opencsg/default.nix
+++ b/pkgs/development/libraries/opencsg/default.nix
@@ -10,11 +10,11 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ qmake ]
-    ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+    ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   buildInputs = [ glew ]
-    ++ lib.optionals stdenv.isLinux [ libGLU libGL libglut libXmu libXext libX11 ]
-    ++ lib.optional stdenv.isDarwin GLUT;
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libGLU libGL libglut libXmu libXext libX11 ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin GLUT;
 
   doCheck = false;
 
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     install -D copying.txt "$out/share/doc/opencsg/copying.txt"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/*.app $out/Applications
     rmdir $out/bin || true
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   dontWrapQtApps = true;
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     app=$out/Applications/opencsgexample.app/Contents/MacOS/opencsgexample
     install_name_tool -change \
       $(otool -L $app | awk '/opencsg.+dylib/ { print $1 }') \
diff --git a/pkgs/development/libraries/openct/default.nix b/pkgs/development/libraries/openct/default.nix
index e4b6110e1c15..c8cc99b3f543 100644
--- a/pkgs/development/libraries/openct/default.nix
+++ b/pkgs/development/libraries/openct/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/OpenSC/openct/";
     license = licenses.lgpl21;
     description = "Drivers for several smart card readers";
diff --git a/pkgs/development/libraries/opencv/4.x.nix b/pkgs/development/libraries/opencv/4.x.nix
index cca9e8ae1c74..ef0266154bd5 100644
--- a/pkgs/development/libraries/opencv/4.x.nix
+++ b/pkgs/development/libraries/opencv/4.x.nix
@@ -26,7 +26,7 @@
 , libtiff
 , enableWebP ? true
 , libwebp
-, enableEXR ? !stdenv.isDarwin
+, enableEXR ? !stdenv.hostPlatform.isDarwin
 , openexr
 , ilmbase
 , enableJPEG2000 ? true
@@ -35,7 +35,7 @@
 , eigen
 , enableBlas ? true
 , blas
-, enableVA ? !stdenv.isDarwin
+, enableVA ? !stdenv.hostPlatform.isDarwin
 , libva
 , enableContrib ? true
 
@@ -329,10 +329,10 @@ effectiveStdenv.mkDerivation {
     openjpeg
   ] ++ lib.optionals enableFfmpeg [
     ffmpeg
-  ] ++ lib.optionals (enableFfmpeg && effectiveStdenv.isDarwin) [
+  ] ++ lib.optionals (enableFfmpeg && effectiveStdenv.hostPlatform.isDarwin) [
     bzip2
     VideoDecodeAcceleration
-  ] ++ lib.optionals (enableGStreamer && effectiveStdenv.isLinux) [
+  ] ++ lib.optionals (enableGStreamer && effectiveStdenv.hostPlatform.isLinux) [
     elfutils
     gst_all_1.gst-plugins-base
     gst_all_1.gst-plugins-good
@@ -360,7 +360,7 @@ effectiveStdenv.mkDerivation {
     leptonica
   ] ++ lib.optionals enableTbb [
     tbb
-  ] ++ lib.optionals effectiveStdenv.isDarwin [
+  ] ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [
     bzip2
     AVFoundation
     Cocoa
@@ -457,7 +457,7 @@ effectiveStdenv.mkDerivation {
     "-DCUDA_ARCH_PTX=${lib.last cudaCapabilities}"
 
     "-DNVIDIA_OPTICAL_FLOW_2_0_HEADERS_PATH=${nvidia-optical-flow-sdk}"
-  ] ++ lib.optionals effectiveStdenv.isDarwin [
+  ] ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [
     "-DWITH_OPENCL=OFF"
     "-DWITH_LAPACK=OFF"
 
@@ -471,7 +471,7 @@ effectiveStdenv.mkDerivation {
     "-DBUILD_JPEG=OFF"
     "-DBUILD_PNG=OFF"
     "-DBUILD_WEBP=OFF"
-  ] ++ lib.optionals (!effectiveStdenv.isDarwin) [
+  ] ++ lib.optionals (!effectiveStdenv.hostPlatform.isDarwin) [
     "-DOPENCL_LIBRARY=${ocl-icd}/lib/libOpenCL.so"
   ] ++ lib.optionals enablePython [
     "-DOPENCV_SKIP_PYTHON_LOADER=ON"
@@ -536,7 +536,7 @@ effectiveStdenv.mkDerivation {
     tests = {
       inherit (gst_all_1) gst-plugins-bad;
     }
-    // lib.optionalAttrs (!effectiveStdenv.isDarwin) { inherit qimgv; }
+    // lib.optionalAttrs (!effectiveStdenv.hostPlatform.isDarwin) { inherit qimgv; }
     // lib.optionalAttrs (!enablePython) { pythonEnabled = pythonPackages.opencv4; }
     // lib.optionalAttrs (effectiveStdenv.buildPlatform != "x86_64-darwin") {
       opencv4-tests = callPackage ./tests.nix {
diff --git a/pkgs/development/libraries/opencv/tests.nix b/pkgs/development/libraries/opencv/tests.nix
index d1966b1a4aa8..dec10c1b13ab 100644
--- a/pkgs/development/libraries/opencv/tests.nix
+++ b/pkgs/development/libraries/opencv/tests.nix
@@ -26,7 +26,7 @@ let
     "video"
     #"videoio" # - a lot of GStreamer warnings and failed tests
     #"dnn" #- some caffe tests failed, probably because github workflow also downloads additional models
-  ] ++ lib.optionals (!stdenv.isAarch64 && enableGStreamer) [ "gapi" ]
+  ] ++ lib.optionals (!stdenv.hostPlatform.isAarch64 && enableGStreamer) [ "gapi" ]
   ++ lib.optionals (enableGtk2 || enableGtk3) [ "highgui" ];
   perfTestNames = [
     "calib3d"
@@ -38,8 +38,8 @@ let
     "photo"
     "stitching"
     "video"
-  ] ++ lib.optionals (!stdenv.isAarch64 && enableGStreamer) [ "gapi" ];
-  testRunner = lib.optionalString (!stdenv.isDarwin) "${lib.getExe xvfb-run} -a ";
+  ] ++ lib.optionals (!stdenv.hostPlatform.isAarch64 && enableGStreamer) [ "gapi" ];
+  testRunner = lib.optionalString (!stdenv.hostPlatform.isDarwin) "${lib.getExe xvfb-run} -a ";
   testsPreparation = ''
     touch $out
     # several tests want a write access, so we have to copy files
diff --git a/pkgs/development/libraries/opendbx/default.nix b/pkgs/development/libraries/opendbx/default.nix
index 9fbb8356679c..ba66ba5be18a 100644
--- a/pkgs/development/libraries/opendbx/default.nix
+++ b/pkgs/development/libraries/opendbx/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Extremely lightweight but extensible database access library written in C";
     mainProgram = "odbx-sql";
     license = licenses.lgpl21;
diff --git a/pkgs/development/libraries/opendht/default.nix b/pkgs/development/libraries/opendht/default.nix
index 322885ac8606..e7408ba37e67 100644
--- a/pkgs/development/libraries/opendht/default.nix
+++ b/pkgs/development/libraries/opendht/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     restinio
     http-parser
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/libraries/opendkim/default.nix b/pkgs/development/libraries/opendkim/default.nix
index 00b5d624153a..8425d5a815bf 100644
--- a/pkgs/development/libraries/opendkim/default.nix
+++ b/pkgs/development/libraries/opendkim/default.nix
@@ -16,11 +16,11 @@ stdenv.mkDerivation rec {
     "--with-milter=${libmilter}"
     "ac_cv_func_malloc_0_nonnull=yes"
     "ac_cv_func_realloc_0_nonnull=yes"
-  ] ++ lib.optional stdenv.isDarwin "--with-unbound=${unbound}";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--with-unbound=${unbound}";
 
   nativeBuildInputs = [ autoreconfHook pkg-config makeWrapper ];
 
-  buildInputs = [ libbsd openssl libmilter perl ] ++ lib.optional stdenv.isDarwin unbound;
+  buildInputs = [ libbsd openssl libmilter perl ] ++ lib.optional stdenv.hostPlatform.isDarwin unbound;
 
   postInstall = ''
     wrapProgram $out/sbin/opendkim-genkey \
diff --git a/pkgs/development/libraries/openexr/3.nix b/pkgs/development/libraries/openexr/3.nix
index 9e6d6eaa65da..56562f771698 100644
--- a/pkgs/development/libraries/openexr/3.nix
+++ b/pkgs/development/libraries/openexr/3.nix
@@ -41,10 +41,10 @@ stdenv.mkDerivation rec {
 
   # Without 'sse' enforcement tests fail on i686 as due to excessive precision as:
   #   error reading back channel B pixel 21,-76 got -nan expected -nan
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-msse2 -mfpmath=sse";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isi686 "-msse2 -mfpmath=sse";
 
   # https://github.com/AcademySoftwareFoundation/openexr/issues/1400
-  doCheck = !stdenv.isAarch32;
+  doCheck = !stdenv.hostPlatform.isAarch32;
 
   passthru.tests = {
     musl = pkgsCross.musl64.openexr_3;
diff --git a/pkgs/development/libraries/openexr/default.nix b/pkgs/development/libraries/openexr/default.nix
index b45557b95c1b..a79759be24f2 100644
--- a/pkgs/development/libraries/openexr/default.nix
+++ b/pkgs/development/libraries/openexr/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
 
   # https://github.com/AcademySoftwareFoundation/openexr/issues/1400
   # https://github.com/AcademySoftwareFoundation/openexr/issues/1281
-  doCheck = !stdenv.isAarch32 && !stdenv.isi686;
+  doCheck = !stdenv.hostPlatform.isAarch32 && !stdenv.hostPlatform.isi686;
 
   meta = with lib; {
     description = "High dynamic-range (HDR) image file format";
diff --git a/pkgs/development/libraries/openfec/default.nix b/pkgs/development/libraries/openfec/default.nix
index 964f5d86f672..8cee39c3a3ab 100644
--- a/pkgs/development/libraries/openfec/default.nix
+++ b/pkgs/development/libraries/openfec/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
       find $dev/include -type f -a ! -iname '*.h' -delete
 
       install -D -m755 -t $out/lib ../bin/Release/libopenfec${so}
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -id $out/lib/libopenfec${so} $out/lib/libopenfec${so}
     '' + ''
       ln -s libopenfec${so} $out/lib/libopenfec${so}.1
diff --git a/pkgs/development/libraries/openimagedenoise/default.nix b/pkgs/development/libraries/openimagedenoise/default.nix
index ad68505ad609..cfd38708cd9a 100644
--- a/pkgs/development/libraries/openimagedenoise/default.nix
+++ b/pkgs/development/libraries/openimagedenoise/default.nix
@@ -14,7 +14,7 @@
 }:
 
 let
-  stdenv' = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   pname = "openimagedenoise";
@@ -39,11 +39,11 @@ stdenv'.mkDerivation (finalAttrs: {
     python3
     ispc
   ] ++ lib.optional cudaSupport cudaPackages.cuda_nvcc
-    ++ lib.optionals stdenv.isDarwin [ xcodebuild ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcodebuild ];
 
   buildInputs =
     [ tbb ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk_11_0.frameworks;
       [
         Accelerate
diff --git a/pkgs/development/libraries/openjpeg/default.nix b/pkgs/development/libraries/openjpeg/default.nix
index 25b43b3600e9..4af80702b556 100644
--- a/pkgs/development/libraries/openjpeg/default.nix
+++ b/pkgs/development/libraries/openjpeg/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     ++ lib.optionals jpipServerSupport [ curl fcgi ]
     ++ lib.optional (jpipLibSupport) jdk;
 
-  doCheck = (!stdenv.isAarch64 && !stdenv.hostPlatform.isPower64); # tests fail on aarch64-linux and powerpc64
+  doCheck = (!stdenv.hostPlatform.isAarch64 && !stdenv.hostPlatform.isPower64); # tests fail on aarch64-linux and powerpc64
   nativeCheckInputs = [ jpylyzer ];
   checkPhase = ''
     substituteInPlace ../tools/ctest_scripts/travis-ci.cmake \
diff --git a/pkgs/development/libraries/openldap/default.nix b/pkgs/development/libraries/openldap/default.nix
index e25f0a8c172d..8ca98b386aa2 100644
--- a/pkgs/development/libraries/openldap/default.nix
+++ b/pkgs/development/libraries/openldap/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     libsodium
     libtool
     openssl
-  ] ++ lib.optionals (stdenv.isLinux) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [
     libxcrypt # causes linking issues on *-darwin
     systemdMinimal
   ];
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "--with-yielding_select=yes"
     "ac_cv_func_memcmp_working=yes"
-  ] ++ lib.optional stdenv.isFreeBSD "--with-pic";
+  ] ++ lib.optional stdenv.hostPlatform.isFreeBSD "--with-pic";
 
   env.NIX_CFLAGS_COMPILE = toString [ "-DLDAPI_SOCK=\"/run/openldap/ldapi\"" ];
 
diff --git a/pkgs/development/libraries/openmpi/default.nix b/pkgs/development/libraries/openmpi/default.nix
index 0ae1118a36b0..a1fb9454561b 100644
--- a/pkgs/development/libraries/openmpi/default.nix
+++ b/pkgs/development/libraries/openmpi/default.nix
@@ -29,7 +29,7 @@
   # Pass PATH/LD_LIBRARY_PATH to point to current mpirun by default
   enablePrefix ? false,
   # Enable libfabric support (necessary for Omnipath networks) on x86_64 linux
-  fabricSupport ? stdenv.isLinux && stdenv.isx86_64,
+  fabricSupport ? stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64,
   # Enable Fortran support
   fortranSupport ? true,
   # AVX/SSE options. See passthru.defaultAvxOptions for the available options.
@@ -75,7 +75,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs =
     [ "out" ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       "man"
       "dev"
     ];
@@ -86,7 +86,7 @@ stdenv.mkDerivation (finalAttrs: {
       libevent
       hwloc
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       libnl
       numactl
       pmix
@@ -95,9 +95,9 @@ stdenv.mkDerivation (finalAttrs: {
       prrte
     ]
     ++ lib.optionals cudaSupport [ cudaPackages.cuda_cudart ]
-    ++ lib.optionals (stdenv.isLinux || stdenv.isFreeBSD) [ rdma-core ]
+    ++ lib.optionals (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isFreeBSD) [ rdma-core ]
     # needed for internal pmix
-    ++ lib.optionals (!stdenv.isLinux) [ python3 ]
+    ++ lib.optionals (!stdenv.hostPlatform.isLinux) [ python3 ]
     ++ lib.optionals fabricSupport [
       libpsm2
       libfabric
@@ -115,11 +115,11 @@ stdenv.mkDerivation (finalAttrs: {
   configureFlags = [
     (lib.enableFeature cudaSupport "mca-dso")
     (lib.enableFeature fortranSupport "mpi-fortran")
-    (lib.withFeatureAs stdenv.isLinux "libnl" (lib.getDev libnl))
+    (lib.withFeatureAs stdenv.hostPlatform.isLinux "libnl" (lib.getDev libnl))
     "--with-pmix=${lib.getDev pmix}"
     "--with-pmix-libdir=${lib.getLib pmix}/lib"
     # Puts a "default OMPI_PRTERUN" value to mpirun / mpiexec executables
-    (lib.withFeatureAs stdenv.isLinux "prrte" (lib.getBin prrte))
+    (lib.withFeatureAs stdenv.hostPlatform.isLinux "prrte" (lib.getBin prrte))
     (lib.withFeature enableSGE "sge")
     (lib.enableFeature enablePrefix "mpirun-prefix-by-default")
     # TODO: add UCX support, which is recommended to use with cuda for the most robust OpenMPI build
@@ -219,7 +219,7 @@ stdenv.mkDerivation (finalAttrs: {
           # we currently don't perform these substitutions on other platforms,
           # until a Darwin user will care enough about this cross platform
           # related substitution.
-          lib.optionalString stdenv.isLinux ''
+          lib.optionalString stdenv.hostPlatform.isLinux ''
             substituteInPlace "''${!outputDev}/share/openmpi/${part1}${part2}-wrapper-data.txt" \
               --replace-fail \
                 compiler=${lib.elemAt wrapperDataSubstitutions.${part2} 0} \
diff --git a/pkgs/development/libraries/opensaml-cpp/default.nix b/pkgs/development/libraries/opensaml-cpp/default.nix
index 5e7de98efc46..910a8bc82737 100644
--- a/pkgs/development/libraries/opensaml-cpp/default.nix
+++ b/pkgs/development/libraries/opensaml-cpp/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     boost openssl log4shib xercesc xml-security-c xml-tooling-c zlib
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreServices
     SystemConfiguration
   ]);
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [ "--with-xmltooling=${xml-tooling-c}" ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.isDarwin) "-std=c++14";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.hostPlatform.isDarwin) "-std=c++14";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/openscenegraph/default.nix b/pkgs/development/libraries/openscenegraph/default.nix
index 3566e458598c..1b0f4b229d36 100644
--- a/pkgs/development/libraries/openscenegraph/default.nix
+++ b/pkgs/development/libraries/openscenegraph/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config cmake doxygen ];
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libX11 libXinerama libXrandr libGLU libGL
   ] ++ [
     glib libxml2 pcre zlib
@@ -63,8 +63,8 @@ stdenv.mkDerivation rec {
     ++ lib.optional sdlSupport SDL2
     ++ lib.optional restSupport asio
     ++ lib.optionals withExamples [ fltk ]
-    ++ lib.optionals (!stdenv.isDarwin) [  ]
-    ++ lib.optionals stdenv.isDarwin [ AGL Accelerate Carbon Cocoa Foundation ]
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [  ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AGL Accelerate Carbon Cocoa Foundation ]
     ++ lib.optional (restSupport || colladaSupport) boost
     ;
 
diff --git a/pkgs/development/libraries/openslp/default.nix b/pkgs/development/libraries/openslp/default.nix
index e390cfd932fd..33b01b764709 100644
--- a/pkgs/development/libraries/openslp/default.nix
+++ b/pkgs/development/libraries/openslp/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     license = licenses.bsd3;
     platforms = platforms.all;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     knownVulnerabilities = [
       "CVE-2023-29552: UDP Reflection Attack with ampliciation factor of up to 2200"
     ];
diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 7c0788a673f6..40edcdee6bc3 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -5,7 +5,7 @@
 , enableSSL2 ? false
 , enableSSL3 ? false
 , enableMD2 ? false
-, enableKTLS ? stdenv.isLinux
+, enableKTLS ? stdenv.hostPlatform.isLinux
 , static ? stdenv.hostPlatform.isStatic
 # path to openssl.cnf file. will be placed in $etc/etc/ssl/openssl.cnf to replace the default
 , conf ? null
diff --git a/pkgs/development/libraries/opensubdiv/default.nix b/pkgs/development/libraries/opensubdiv/default.nix
index b5c2847fb9ba..4cee5df5dc3d 100644
--- a/pkgs/development/libraries/opensubdiv/default.nix
+++ b/pkgs/development/libraries/opensubdiv/default.nix
@@ -31,8 +31,8 @@ stdenv.mkDerivation rec {
       glew xorg.libX11 xorg.libXrandr xorg.libXxf86vm xorg.libXcursor
       xorg.libXinerama xorg.libXi
     ]
-    ++ lib.optionals (openclSupport && !stdenv.isDarwin) [ ocl-icd ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    ++ lib.optionals (openclSupport && !stdenv.hostPlatform.isDarwin) [ ocl-icd ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       OpenCL
       Cocoa
       CoreVideo
@@ -58,10 +58,10 @@ stdenv.mkDerivation rec {
     [ "-DNO_TUTORIALS=1"
       "-DNO_REGRESSION=1"
       "-DNO_EXAMPLES=1"
-      (lib.cmakeBool "NO_METAL" (!stdenv.isDarwin))
+      (lib.cmakeBool "NO_METAL" (!stdenv.hostPlatform.isDarwin))
       (lib.cmakeBool "NO_OPENCL" (!openclSupport))
       (lib.cmakeBool "NO_CUDA" (!cudaSupport))
-    ] ++ lib.optionals (!stdenv.isDarwin) [
+    ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       "-DGLEW_INCLUDE_DIR=${glew.dev}/include"
       "-DGLEW_LIBRARY=${glew.dev}/lib"
     ] ++ lib.optionals cudaSupport [
diff --git a/pkgs/development/libraries/openvdb/default.nix b/pkgs/development/libraries/openvdb/default.nix
index 2b1fca97f06e..72d2d7dce0c8 100644
--- a/pkgs/development/libraries/openvdb/default.nix
+++ b/pkgs/development/libraries/openvdb/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec
   cmakeFlags = [ "-DOPENVDB_CORE_STATIC=OFF" "-DOPENVDB_BUILD_NANOVDB=ON"];
 
   # error: aligned deallocation function of type 'void (void *, std::align_val_t) noexcept' is only available on macOS 10.13 or newer
-  env = lib.optionalAttrs (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13" && lib.versionAtLeast tbb.version "2021.8.0") {
+  env = lib.optionalAttrs (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13" && lib.versionAtLeast tbb.version "2021.8.0") {
     NIX_CFLAGS_COMPILE = "-faligned-allocation";
   };
 
diff --git a/pkgs/development/libraries/openvino/default.nix b/pkgs/development/libraries/openvino/default.nix
index a1f30277151b..98129c5944d1 100644
--- a/pkgs/development/libraries/openvino/default.nix
+++ b/pkgs/development/libraries/openvino/default.nix
@@ -116,7 +116,7 @@ stdenv.mkDerivation rec {
     (cmakeBool "ENABLE_SAMPLES" false)
 
     # features
-    (cmakeBool "ENABLE_INTEL_CPU" stdenv.isx86_64)
+    (cmakeBool "ENABLE_INTEL_CPU" stdenv.hostPlatform.isx86_64)
     (cmakeBool "ENABLE_JS" false)
     (cmakeBool "ENABLE_LTO" true)
     (cmakeBool "ENABLE_ONEDNN_FOR_GPU" false)
@@ -177,7 +177,7 @@ stdenv.mkDerivation rec {
     homepage = "https://docs.openvinotoolkit.org/";
     license = with licenses; [ asl20 ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # Cannot find macos sdk
+    broken = stdenv.hostPlatform.isDarwin; # Cannot find macos sdk
     maintainers = with maintainers; [ tfmoraes ];
   };
 }
diff --git a/pkgs/development/libraries/oracle-instantclient/default.nix b/pkgs/development/libraries/oracle-instantclient/default.nix
index 87381141d98f..4d6a605bf084 100644
--- a/pkgs/development/libraries/oracle-instantclient/default.nix
+++ b/pkgs/development/libraries/oracle-instantclient/default.nix
@@ -99,12 +99,12 @@ stdenv.mkDerivation {
   inherit pname version srcs;
 
   buildInputs = [ stdenv.cc.cc.lib ]
-    ++ optional stdenv.isLinux libaio
+    ++ optional stdenv.hostPlatform.isLinux libaio
     ++ optional odbcSupport unixODBC;
 
   nativeBuildInputs = [ makeWrapper unzip ]
-    ++ optional stdenv.isLinux autoPatchelfHook
-    ++ optional stdenv.isDarwin fixDarwinDylibNames;
+    ++ optional stdenv.hostPlatform.isLinux autoPatchelfHook
+    ++ optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   outputs = [ "out" "dev" "lib" ];
 
@@ -125,7 +125,7 @@ stdenv.mkDerivation {
     ln -sfn $out/bin/sqlplus $out/bin/sqlplus64
   '';
 
-  postFixup = optionalString stdenv.isDarwin ''
+  postFixup = optionalString stdenv.hostPlatform.isDarwin ''
     for exe in "$out/bin/"* ; do
       if [ ! -L "$exe" ]; then
         install_name_tool -add_rpath "$lib/lib" "$exe"
diff --git a/pkgs/development/libraries/packr/default.nix b/pkgs/development/libraries/packr/default.nix
index 43822d76aa19..d149c48cc563 100644
--- a/pkgs/development/libraries/packr/default.nix
+++ b/pkgs/development/libraries/packr/default.nix
@@ -34,7 +34,7 @@ let p2 = buildGoModule rec {
     #
     # but this package is no longer maintained.
     #
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 };
 p1 = buildGoModule rec {
@@ -66,7 +66,7 @@ p1 = buildGoModule rec {
     #
     # but this package is no longer maintained.
     #
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 };
 in
diff --git a/pkgs/development/libraries/pagmo2/default.nix b/pkgs/development/libraries/pagmo2/default.nix
index b7d3d92db0bb..e39f059e31d2 100644
--- a/pkgs/development/libraries/pagmo2/default.nix
+++ b/pkgs/development/libraries/pagmo2/default.nix
@@ -22,17 +22,17 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ eigen nlopt boost tbb ] ++ lib.optional (!stdenv.isDarwin) ipopt;
+  buildInputs = [ eigen nlopt boost tbb ] ++ lib.optional (!stdenv.hostPlatform.isDarwin) ipopt;
 
   cmakeFlags = [
     "-DPAGMO_BUILD_TESTS=${if runTests then "ON" else "OFF"}"
     "-DPAGMO_WITH_EIGEN3=yes"
     "-DPAGMO_WITH_NLOPT=yes"
     "-DNLOPT_LIBRARY=${nlopt}/lib/libnlopt${stdenv.hostPlatform.extensions.sharedLibrary}"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DPAGMO_WITH_IPOPT=yes"
     "-DCMAKE_CXX_FLAGS='-fuse-ld=gold'"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # FIXME: fails ipopt test with Invalid_Option on darwin, so disable.
     "-DPAGMO_WITH_IPOPT=no"
     "-DLLVM_USE_LINKER=gold"
diff --git a/pkgs/development/libraries/pango/default.nix b/pkgs/development/libraries/pango/default.nix
index d91552e3799a..4b442a0ff900 100644
--- a/pkgs/development/libraries/pango/default.nix
+++ b/pkgs/development/libraries/pango/default.nix
@@ -16,7 +16,7 @@
 , ninja
 , glib
 , python3
-, x11Support? !stdenv.isDarwin, libXft
+, x11Support? !stdenv.hostPlatform.isDarwin, libXft
 , withIntrospection ? lib.meta.availableOn stdenv.hostPlatform gobject-introspection && stdenv.hostPlatform.emulatorAvailable buildPackages
 , buildPackages, gobject-introspection
 , testers
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     fribidi
     libthai
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     ApplicationServices
     Carbon
     CoreGraphics
diff --git a/pkgs/development/libraries/pangolin/default.nix b/pkgs/development/libraries/pangolin/default.nix
index 600c7b0eb058..1dd52ab7ff36 100644
--- a/pkgs/development/libraries/pangolin/default.nix
+++ b/pkgs/development/libraries/pangolin/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     libtiff
     eigen
   ]
-  ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa ];
 
   # The tests use cmake's findPackage to find the installed version of
   # pangolin, which isn't what we want (or available).
diff --git a/pkgs/development/libraries/pangomm/2.42.nix b/pkgs/development/libraries/pangomm/2.42.nix
index 267e46c48c3d..ebbaee668563 100644
--- a/pkgs/development/libraries/pangomm/2.42.nix
+++ b/pkgs/development/libraries/pangomm/2.42.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "dev" ];
 
-  nativeBuildInputs = [ pkg-config meson ninja python3 ] ++ lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = [ pkg-config meson ninja python3 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
   ];
   propagatedBuildInputs = [ pango glibmm cairomm ];
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "C++ interface to the Pango text rendering library";
     homepage    = "https://www.pango.org/";
     license     = with licenses; [ lgpl2 lgpl21 ];
diff --git a/pkgs/development/libraries/pangomm/2.48.nix b/pkgs/development/libraries/pangomm/2.48.nix
index fa4148e06aa0..3b513b889937 100644
--- a/pkgs/development/libraries/pangomm/2.48.nix
+++ b/pkgs/development/libraries/pangomm/2.48.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     meson
     ninja
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
   ];
 
diff --git a/pkgs/development/libraries/pangomm/default.nix b/pkgs/development/libraries/pangomm/default.nix
index 02a76869cf1e..65dede46ee9e 100644
--- a/pkgs/development/libraries/pangomm/default.nix
+++ b/pkgs/development/libraries/pangomm/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "dev" ];
 
-  nativeBuildInputs = [ pkg-config meson ninja python3 ] ++ lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = [ pkg-config meson ninja python3 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
   ];
   propagatedBuildInputs = [ pango glibmm cairomm ];
diff --git a/pkgs/development/libraries/partio/default.nix b/pkgs/development/libraries/partio/default.nix
index 05c8abfafb2a..2c117bdabb90 100644
--- a/pkgs/development/libraries/partio/default.nix
+++ b/pkgs/development/libraries/partio/default.nix
@@ -39,10 +39,10 @@ stdenv.mkDerivation rec {
     swig
     xorg.libXi
     xorg.libXmu
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     darwin.apple_sdk.frameworks.GLUT
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libglut
     libGLU
     libGL
diff --git a/pkgs/development/libraries/pc-ble-driver/default.nix b/pkgs/development/libraries/pc-ble-driver/default.nix
index 7a7b8475d7c4..0391b72ada89 100644
--- a/pkgs/development/libraries/pc-ble-driver/default.nix
+++ b/pkgs/development/libraries/pc-ble-driver/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DNRF_BLE_DRIVER_VERSION=${version}"
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     "-DARCH=arm64"
   ];
 
@@ -39,9 +39,9 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [
 
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     IOKit
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     udev
   ];
 
diff --git a/pkgs/development/libraries/pcaudiolib/default.nix b/pkgs/development/libraries/pcaudiolib/default.nix
index 347e8b5cdf2c..1152283b1f2c 100644
--- a/pkgs/development/libraries/pcaudiolib/default.nix
+++ b/pkgs/development/libraries/pcaudiolib/default.nix
@@ -10,7 +10,7 @@
 , pkg-config
 , portaudio
 , which
-, pulseaudioSupport ? config.pulseaudio or stdenv.isLinux
+, pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -35,12 +35,12 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     portaudio
   ]
-  ++ lib.optional stdenv.isLinux alsa-lib
+  ++ lib.optional stdenv.hostPlatform.isLinux alsa-lib
   ++ lib.optional pulseaudioSupport libpulseaudio;
 
   # touch ChangeLog to avoid below error on darwin:
   # Makefile.am: error: required file './ChangeLog.md' not found
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     touch ChangeLog
   '' + ''
     ./autogen.sh
diff --git a/pkgs/development/libraries/pcg-c/default.nix b/pkgs/development/libraries/pcg-c/default.nix
index ced4e04c0b87..3ad9df8b64bd 100644
--- a/pkgs/development/libraries/pcg-c/default.nix
+++ b/pkgs/development/libraries/pcg-c/default.nix
@@ -31,6 +31,6 @@ stdenv.mkDerivation rec {
     '';
     platforms = lib.platforms.unix;
     maintainers = [ lib.maintainers.linus ];
-    broken = stdenv.isi686; # https://github.com/imneme/pcg-c/issues/11
+    broken = stdenv.hostPlatform.isi686; # https://github.com/imneme/pcg-c/issues/11
   };
 }
diff --git a/pkgs/development/libraries/pcl/default.nix b/pkgs/development/libraries/pcl/default.nix
index 36e54f873cc7..41639d300ecd 100644
--- a/pkgs/development/libraries/pcl/default.nix
+++ b/pkgs/development/libraries/pcl/default.nix
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
     qtbase
     libXt
   ]
-  ++ lib.optionals stdenv.isDarwin [ Cocoa AGL ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa AGL ];
 
   propagatedBuildInputs = [
     boost
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
     vtk
   ];
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks"
   ] ++ lib.optionals cudaSupport [ "-DWITH_CUDA=true" ];
 
diff --git a/pkgs/development/libraries/physfs/default.nix b/pkgs/development/libraries/physfs/default.nix
index 27f7c019ac77..e00be9c841f9 100644
--- a/pkgs/development/libraries/physfs/default.nix
+++ b/pkgs/development/libraries/physfs/default.nix
@@ -16,7 +16,7 @@ let
     nativeBuildInputs = [ cmake doxygen ];
 
     buildInputs = [ zlib ]
-      ++ lib.optionals stdenv.isDarwin [ Foundation ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
     doInstallCheck = true;
 
diff --git a/pkgs/development/libraries/physics/applgrid/default.nix b/pkgs/development/libraries/physics/applgrid/default.nix
index c2dbb1235b48..b083f278af9d 100644
--- a/pkgs/development/libraries/physics/applgrid/default.nix
+++ b/pkgs/development/libraries/physics/applgrid/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ gfortran ];
 
   # For some reason zlib was only needed after bump to gfortran8
-  buildInputs = [ hoppet lhapdf root5 zlib ] ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+  buildInputs = [ hoppet lhapdf root5 zlib ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   patches = [
     ./bad_code.patch
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   preConfigure = ''
     substituteInPlace src/Makefile.in \
       --replace "-L\$(subst /libgfortran.a, ,\$(FRTLIB) )" "-L${gfortran.cc.lib}/lib"
-  '' + (lib.optionalString stdenv.isDarwin ''
+  '' + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/Makefile.in \
       --replace "gfortran -print-file-name=libgfortran.a" "gfortran -print-file-name=libgfortran.dylib"
   '');
diff --git a/pkgs/development/libraries/physics/cernlib/default.nix b/pkgs/development/libraries/physics/cernlib/default.nix
index 13d1cb081249..0673aeefffb1 100644
--- a/pkgs/development/libraries/physics/cernlib/default.nix
+++ b/pkgs/development/libraries/physics/cernlib/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     libXt
     libxcrypt
     motif
-  ] ++ lib.optional stdenv.isLinux libnsl;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux libnsl;
 
   setupHook = ./setup-hook.sh;
 
diff --git a/pkgs/development/libraries/physics/geant4/default.nix b/pkgs/development/libraries/physics/geant4/default.nix
index 7349c708e3d9..128d7391fc4a 100644
--- a/pkgs/development/libraries/physics/geant4/default.nix
+++ b/pkgs/development/libraries/physics/geant4/default.nix
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
     "-DGEANT4_USE_SYSTEM_EXPAT=ON"
     "-DGEANT4_USE_SYSTEM_ZLIB=ON"
     "-DGEANT4_BUILD_MULTITHREADED=${if enableMultiThreading then "ON" else "OFF"}"
-  ] ++ lib.optionals (enableOpenGLX11 && stdenv.isDarwin) [
+  ] ++ lib.optionals (enableOpenGLX11 && stdenv.hostPlatform.isDarwin) [
     "-DXQuartzGL_INCLUDE_DIR=${libGLX.dev}/include"
     "-DXQuartzGL_gl_LIBRARY=${libGLX}/lib/libGL.dylib"
   ] ++ lib.optionals (enableMultiThreading && enablePython) [
@@ -128,7 +128,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Toolkit for the simulation of the passage of particles through matter";
     longDescription = ''
       Geant4 is a toolkit for the simulation of the passage of particles through matter.
diff --git a/pkgs/development/libraries/physics/hepmc3/default.nix b/pkgs/development/libraries/physics/hepmc3/default.nix
index 53ee798c17b6..c622d7562001 100644
--- a/pkgs/development/libraries/physics/hepmc3/default.nix
+++ b/pkgs/development/libraries/physics/hepmc3/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   ++ lib.optional withPython python;
 
   # error: invalid version number in 'MACOSX_DEPLOYMENT_TARGET=11.0'
-  preConfigure = lib.optionalString (stdenv.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
+  preConfigure = lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11") ''
     MACOSX_DEPLOYMENT_TARGET=10.16
   '';
 
diff --git a/pkgs/development/libraries/physics/herwig/default.nix b/pkgs/development/libraries/physics/herwig/default.nix
index ef7ce7ce586d..c18ff9bef84d 100644
--- a/pkgs/development/libraries/physics/herwig/default.nix
+++ b/pkgs/development/libraries/physics/herwig/default.nix
@@ -35,6 +35,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ veprbl ];
     platforms = platforms.unix;
-    broken = stdenv.isAarch64; # doesn't compile: ignoring return value of 'FILE* freopen...
+    broken = stdenv.hostPlatform.isAarch64; # doesn't compile: ignoring return value of 'FILE* freopen...
   };
 }
diff --git a/pkgs/development/libraries/physics/lhapdf/default.nix b/pkgs/development/libraries/physics/lhapdf/default.nix
index 8111f6168430..26ca234c520c 100644
--- a/pkgs/development/libraries/physics/lhapdf/default.nix
+++ b/pkgs/development/libraries/physics/lhapdf/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   # The Apple SDK only exports locale_t from xlocale.h whereas glibc
   # had decided that xlocale.h should be a part of locale.h
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.cc.isGNU) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.cc.isGNU) ''
     substituteInPlace src/GridPDF.cc --replace '#include <locale>' '#include <xlocale.h>'
   '';
 
diff --git a/pkgs/development/libraries/physics/nlojet/default.nix b/pkgs/development/libraries/physics/nlojet/default.nix
index 4e2d878db00c..6085906758b0 100644
--- a/pkgs/development/libraries/physics/nlojet/default.nix
+++ b/pkgs/development/libraries/physics/nlojet/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   env.CXXFLAGS="-std=c++11";
 
   # error: no member named 'finite' in the global namespace; did you mean simply 'finite'?
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-Dfinite=isfinite";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-Dfinite=isfinite";
 
   meta = {
     homepage    = "http://www.desy.de/~znagy/Site/NLOJet++.html";
diff --git a/pkgs/development/libraries/physics/pythia/default.nix b/pkgs/development/libraries/physics/pythia/default.nix
index 0eb45943e0aa..55ba50f2ae31 100644
--- a/pkgs/development/libraries/physics/pythia/default.nix
+++ b/pkgs/development/libraries/physics/pythia/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ rsync ]
-    ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
   buildInputs = [ boost fastjet hepmc zlib lhapdf ];
 
   configureFlags = [
diff --git a/pkgs/development/libraries/pixman/default.nix b/pkgs/development/libraries/pixman/default.nix
index 71c0b7d47037..dbf742ab81f2 100644
--- a/pkgs/development/libraries/pixman/default.nix
+++ b/pkgs/development/libraries/pixman/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Diwmmxt=disabled"
   ]
   # Disable until https://gitlab.freedesktop.org/pixman/pixman/-/issues/46 is resolved
-  ++ lib.optional (stdenv.isAarch64 && !stdenv.cc.isGNU) "-Da64-neon=disabled";
+  ++ lib.optional (stdenv.hostPlatform.isAarch64 && !stdenv.cc.isGNU) "-Da64-neon=disabled";
 
   preConfigure = ''
     # https://gitlab.freedesktop.org/pixman/pixman/-/issues/62
@@ -61,7 +61,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postInstall = glib.flattenInclude;
 
diff --git a/pkgs/development/libraries/plplot/default.nix b/pkgs/development/libraries/plplot/default.nix
index b060351a2f26..d49b8da211d8 100644
--- a/pkgs/development/libraries/plplot/default.nix
+++ b/pkgs/development/libraries/plplot/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
 
   buildInputs =
     lib.optional enableWX wxGTK32
-    ++ lib.optional (enableWX && stdenv.isDarwin) Cocoa
+    ++ lib.optional (enableWX && stdenv.hostPlatform.isDarwin) Cocoa
     ++ lib.optional enableXWin xorg.libX11
     ++ lib.optionals enablePNG [
       cairo
diff --git a/pkgs/development/libraries/pmix/default.nix b/pkgs/development/libraries/pmix/default.nix
index 69e86acfef23..486164904b2b 100644
--- a/pkgs/development/libraries/pmix/default.nix
+++ b/pkgs/development/libraries/pmix/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     fetchSubmodules = true;
   };
 
-  outputs = [ "out" ] ++ lib.optionals stdenv.isLinux [ "dev" ];
+  outputs = [ "out" ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "dev" ];
 
   postPatch = ''
     patchShebangs ./autogen.pl
@@ -82,7 +82,7 @@ stdenv.mkDerivation (finalAttrs: {
     # From some reason the Darwin build doesn't include this file, so we
     # currently disable this substitution for any non-Linux platform, until a
     # Darwin user will care enough about this cross platform fix.
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       # Pin the compiler to the current version in a cross compiler friendly way.
       # Same pattern as for openmpi (see https://github.com/NixOS/nixpkgs/pull/58964#discussion_r275059427).
       substituteInPlace "''${!outputDev}"/share/pmix/pmixcc-wrapper-data.txt \
diff --git a/pkgs/development/libraries/png++/default.nix b/pkgs/development/libraries/png++/default.nix
index dfd74e495e76..e3aa6af942e2 100644
--- a/pkgs/development/libraries/png++/default.nix
+++ b/pkgs/development/libraries/png++/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ libpng ];
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace error.hpp --replace "#if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE" "#if (__clang__ || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE"
   '' + ''
     sed "s|\(PNGPP := .\)|PREFIX := ''${out}\n\\1|" -i Makefile
diff --git a/pkgs/development/libraries/polkit-qt-1/default.nix b/pkgs/development/libraries/polkit-qt-1/default.nix
index b663c865d233..0fb66ccc7c3d 100644
--- a/pkgs/development/libraries/polkit-qt-1/default.nix
+++ b/pkgs/development/libraries/polkit-qt-1/default.nix
@@ -27,7 +27,7 @@ mkDerivation rec {
     glib
     pcre
     polkit
-  ] ++ lib.optionals stdenv.isLinux [ libselinux libsepol util-linux ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libselinux libsepol util-linux ];
 
   meta = with lib; {
     description = "Qt wrapper around PolKit";
diff --git a/pkgs/development/libraries/polkit/default.nix b/pkgs/development/libraries/polkit/default.nix
index dd3c6aaea354..17b325f52d8f 100644
--- a/pkgs/development/libraries/polkit/default.nix
+++ b/pkgs/development/libraries/polkit/default.nix
@@ -29,7 +29,7 @@
 # Not yet investigated; it may be due to the "Make netgroup support optional"
 # patch not updating the tests correctly yet, or doing something wrong,
 # or being unrelated to that.
-, doCheck ? (stdenv.isLinux && !stdenv.hostPlatform.isMusl)
+, doCheck ? (stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isMusl)
 }:
 
 let
@@ -93,7 +93,7 @@ stdenv.mkDerivation rec {
     pam
     dbus
     duktape
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     # On Linux, fall back to elogind when systemd support is off.
     (if useSystemd then systemdMinimal else elogind)
   ];
@@ -127,7 +127,7 @@ stdenv.mkDerivation rec {
     "-Dtests=${lib.boolToString doCheck}"
     "-Dgtk_doc=${lib.boolToString withIntrospection}"
     "-Dman=true"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-Dsession_tracking=${if useSystemd then "libsystemd-login" else "libelogind"}"
   ];
 
diff --git a/pkgs/development/libraries/poppler/default.nix b/pkgs/development/libraries/poppler/default.nix
index 2893b5e1b044..368c5a06a463 100644
--- a/pkgs/development/libraries/poppler/default.nix
+++ b/pkgs/development/libraries/poppler/default.nix
@@ -126,7 +126,7 @@ stdenv.mkDerivation (finalAttrs: rec {
   dontWrapQtApps = true;
 
   # Workaround #54606
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i -e '1i cmake_policy(SET CMP0025 NEW)' CMakeLists.txt
   '';
 
diff --git a/pkgs/development/libraries/popt/default.nix b/pkgs/development/libraries/popt/default.nix
index e97629b0dfd0..282203a98af7 100644
--- a/pkgs/development/libraries/popt/default.nix
+++ b/pkgs/development/libraries/popt/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ updateAutotoolsGnuConfigScriptsHook ];
 
-  patches = lib.optionals stdenv.isCygwin [
+  patches = lib.optionals stdenv.hostPlatform.isCygwin [
     ./1.16-cygwin.patch
     ./1.16-vpath.patch
   ] ++ lib.optionals stdenv.hostPlatform.isMinGW [
diff --git a/pkgs/development/libraries/portaudio/default.nix b/pkgs/development/libraries/portaudio/default.nix
index a109aad97b9d..6d338b0f67e0 100644
--- a/pkgs/development/libraries/portaudio/default.nix
+++ b/pkgs/development/libraries/portaudio/default.nix
@@ -22,13 +22,13 @@ stdenv.mkDerivation rec {
 
   strictDeps = true;
   nativeBuildInputs = [ pkg-config which ];
-  buildInputs = [ libjack2 ] ++ lib.optionals (!stdenv.isDarwin) [ alsa-lib ];
+  buildInputs = [ libjack2 ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ alsa-lib ];
 
   configureFlags = [ "--disable-mac-universal" "--enable-cxx" ];
 
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=nullability-inferred-on-nested-type -Wno-error=nullability-completeness-on-arrays -Wno-error=implicit-const-int-float-conversion";
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [ AudioUnit AudioToolbox CoreAudio CoreServices Carbon ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ AudioUnit AudioToolbox CoreAudio CoreServices Carbon ];
 
   # Disable parallel build as it fails as:
   #   make: *** No rule to make target '../../../lib/libportaudio.la',
@@ -45,10 +45,10 @@ stdenv.mkDerivation rec {
   # not sure why, but all the headers seem to be installed by the make install
   installPhase = ''
     make install
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # fixup .pc file to find alsa library
     sed -i "s|-lasound|-L${alsa-lib.out}/lib -lasound|" "$out/lib/pkgconfig/"*.pc
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp include/pa_mac_core.h $out/include/pa_mac_core.h
   '';
 
diff --git a/pkgs/development/libraries/portmidi/default.nix b/pkgs/development/libraries/portmidi/default.nix
index 8e743f6a54b3..eac2a369fd0b 100644
--- a/pkgs/development/libraries/portmidi/default.nix
+++ b/pkgs/development/libraries/portmidi/default.nix
@@ -27,9 +27,9 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ unzip cmake ];
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon CoreAudio CoreFoundation CoreMIDI CoreServices
   ];
 
diff --git a/pkgs/development/libraries/ppl/default.nix b/pkgs/development/libraries/ppl/default.nix
index 863ffed42932..37e5f78c6027 100644
--- a/pkgs/development/libraries/ppl/default.nix
+++ b/pkgs/development/libraries/ppl/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
   propagatedBuildInputs = [ gmpxx ];
 
   configureFlags = [ "--disable-watchdog" ] ++
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       "CPPFLAGS=-fexceptions"
       "--disable-ppl_lcdd" "--disable-ppl_lpsol" "--disable-ppl_pips"
     ];
diff --git a/pkgs/development/libraries/precice/default.nix b/pkgs/development/libraries/precice/default.nix
index 372a2940e0ae..56dd58781bdf 100644
--- a/pkgs/development/libraries/precice/default.nix
+++ b/pkgs/development/libraries/precice/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   ];
 
   env.NIX_CFLAGS_COMPILE = toString (
-    lib.optionals stdenv.isDarwin [ "-D_GNU_SOURCE" ]
+    lib.optionals stdenv.hostPlatform.isDarwin [ "-D_GNU_SOURCE" ]
     # libxml2-2.12 changed const qualifiers
     ++ [ "-fpermissive" ]
   );
diff --git a/pkgs/development/libraries/proj/default.nix b/pkgs/development/libraries/proj/default.nix
index 8fedba3ef08c..615d2590c023 100644
--- a/pkgs/development/libraries/proj/default.nix
+++ b/pkgs/development/libraries/proj/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   preCheck =
     let
-      libPathEnvVar = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+      libPathEnvVar = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     in
       ''
         export HOME=$TMPDIR
diff --git a/pkgs/development/libraries/protobuf/generic-v3.nix b/pkgs/development/libraries/protobuf/generic-v3.nix
index 9dc7f70c2fe2..cfcaa5551526 100644
--- a/pkgs/development/libraries/protobuf/generic-v3.nix
+++ b/pkgs/development/libraries/protobuf/generic-v3.nix
@@ -25,7 +25,7 @@ mkProtobufDerivation = buildProtobuf: stdenv: stdenv.mkDerivation {
     chmod -R a+w gmock
     chmod -R a+w googletest
     ln -s ../googletest gmock/gtest
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/google/protobuf/testing/googletest.cc \
       --replace 'tmpnam(b)' '"'$TMPDIR'/foo"'
   '';
diff --git a/pkgs/development/libraries/protobuf/generic.nix b/pkgs/development/libraries/protobuf/generic.nix
index 71f8e90b774a..0b52ea7de22e 100644
--- a/pkgs/development/libraries/protobuf/generic.nix
+++ b/pkgs/development/libraries/protobuf/generic.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
     inherit hash;
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/google/protobuf/testing/googletest.cc \
       --replace 'tmpnam(b)' '"'$TMPDIR'/foo"'
   '';
@@ -85,7 +85,7 @@ stdenv.mkDerivation (finalAttrs: {
   # https://hydra.nixos.org/build/235677717/nixlog/4/tail
   # Also AnyTest.TestPackFromSerializationExceedsSizeLimit fails on 32-bit platforms
   # https://github.com/protocolbuffers/protobuf/issues/8460
-  doCheck = !(stdenv.isDarwin && lib.versionAtLeast version "23") && !stdenv.hostPlatform.is32bit;
+  doCheck = !(stdenv.hostPlatform.isDarwin && lib.versionAtLeast version "23") && !stdenv.hostPlatform.is32bit;
 
   passthru = {
     tests = {
diff --git a/pkgs/development/libraries/pslib/default.nix b/pkgs/development/libraries/pslib/default.nix
index 02a8fcde91ef..13a2b17a3e01 100644
--- a/pkgs/development/libraries/pslib/default.nix
+++ b/pkgs/development/libraries/pslib/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ zlib libpng libjpeg giflib libtiff ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
   };
 
diff --git a/pkgs/development/libraries/pth/default.nix b/pkgs/development/libraries/pth/default.nix
index bbbc5017c410..3d4c056b71dd 100644
--- a/pkgs/development/libraries/pth/default.nix
+++ b/pkgs/development/libraries/pth/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0ckjqw5kz5m30srqi87idj7xhpw6bpki43mj07bazjm2qmh3cdbj";
   };
 
-  preConfigure = lib.optionalString stdenv.isAarch32 ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isAarch32 ''
     configureFlagsArray=("CFLAGS=-DJB_SP=8 -DJB_PC=9")
   '' + lib.optionalString (stdenv.hostPlatform.libc == "glibc") ''
     configureFlagsArray+=("ac_cv_check_sjlj=ssjlj")
diff --git a/pkgs/development/libraries/python-qt/default.nix b/pkgs/development/libraries/python-qt/default.nix
index f79487a3c4b9..4f417c5e15e3 100644
--- a/pkgs/development/libraries/python-qt/default.nix
+++ b/pkgs/development/libraries/python-qt/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation (finalAttrs: {
     cp -r ./extensions $out/include/PythonQt
   '';
 
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id \
       $out/lib/libPythonQt-Qt5-Python3.${python3.sourceVersion.minor}.dylib \
       $out/lib/libPythonQt-Qt5-Python3.${python3.sourceVersion.minor}.dylib
diff --git a/pkgs/development/libraries/qhull/default.nix b/pkgs/development/libraries/qhull/default.nix
index a7f1bc271155..998575bb166c 100644
--- a/pkgs/development/libraries/qhull/default.nix
+++ b/pkgs/development/libraries/qhull/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ]
-    ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+    ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   meta = with lib; {
     homepage = "http://www.qhull.org/";
diff --git a/pkgs/development/libraries/qmltermwidget/default.nix b/pkgs/development/libraries/qmltermwidget/default.nix
index 0984912463e1..6ba9418a6e20 100644
--- a/pkgs/development/libraries/qmltermwidget/default.nix
+++ b/pkgs/development/libraries/qmltermwidget/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
   buildInputs = [
     qtbase
     qtmultimedia
-  ] ++ lib.optional stdenv.isDarwin utmp;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin utmp;
 
   patches = [
     # Changes required to make it compatible with lomiri-terminal-app
diff --git a/pkgs/development/libraries/qrencode/default.nix b/pkgs/development/libraries/qrencode/default.nix
index 237751c6f8f2..8a52fce9c74a 100644
--- a/pkgs/development/libraries/qrencode/default.nix
+++ b/pkgs/development/libraries/qrencode/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation (finalAttrs: rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ libiconv libpng ]
-    ++ lib.optionals stdenv.isDarwin [ libobjc ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc ];
 
   nativeCheckInputs = [ SDL2 ];
 
diff --git a/pkgs/development/libraries/qrupdate/default.nix b/pkgs/development/libraries/qrupdate/default.nix
index 282b926b2e77..a3ccff5c1093 100644
--- a/pkgs/development/libraries/qrupdate/default.nix
+++ b/pkgs/development/libraries/qrupdate/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # https://github.com/mpimd-csc/qrupdate-ng/issues/4
-  patches = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  patches = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     ./disable-zch1dn-test.patch
   ];
 
diff --git a/pkgs/development/libraries/qscintilla/default.nix b/pkgs/development/libraries/qscintilla/default.nix
index 69adf65643d0..0d8df9b316b8 100644
--- a/pkgs/development/libraries/qscintilla/default.nix
+++ b/pkgs/development/libraries/qscintilla/default.nix
@@ -10,7 +10,7 @@
 }:
 
 let
-  stdenv' = if stdenv.isDarwin then
+  stdenv' = if stdenv.hostPlatform.isDarwin then
     darwin.apple_sdk_11_0.stdenv
   else
     stdenv
@@ -28,10 +28,10 @@ in stdenv'.mkDerivation rec {
 
   buildInputs = [ qtbase ];
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [ qtmacextras ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ qtmacextras ];
 
   nativeBuildInputs = [ unzip qmake ]
-    ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
 
   # Make sure that libqscintilla2.so is available in $out/lib since it is expected
   # by some packages such as sqlitebrowser
@@ -71,6 +71,6 @@ in stdenv'.mkDerivation rec {
     maintainers = with maintainers; [ peterhoeg ];
     platforms = platforms.unix;
     # ld: library not found for -lcups
-    broken = stdenv.isDarwin && lib.versionAtLeast qtbase.version "6";
+    broken = stdenv.hostPlatform.isDarwin && lib.versionAtLeast qtbase.version "6";
   };
 }
diff --git a/pkgs/development/libraries/qt-5/5.15/default.nix b/pkgs/development/libraries/qt-5/5.15/default.nix
index af2f431dfb40..2f57b1c62de4 100644
--- a/pkgs/development/libraries/qt-5/5.15/default.nix
+++ b/pkgs/development/libraries/qt-5/5.15/default.nix
@@ -28,7 +28,7 @@ let
   qtCompatVersion = srcs.qtbase.version;
 
   patches = {
-    qtbase = lib.optionals stdenv.isDarwin [
+    qtbase = lib.optionals stdenv.hostPlatform.isDarwin [
       ./qtbase.patch.d/0001-qtbase-mkspecs-mac.patch
 
       # Patch framework detection to support X.framework/X.tbd,
@@ -63,7 +63,7 @@ let
         hash = "sha256-UEvIXzn387f9BAeBdhheStD/4M7en+rmqX8C6gstl6k=";
       })
     ];
-    qtmultimedia = lib.optionals stdenv.isDarwin [
+    qtmultimedia = lib.optionals stdenv.hostPlatform.isDarwin [
       # build patch for qtmultimedia with xcode 15
       (fetchpatch {
         url = "https://raw.githubusercontent.com/Homebrew/formula-patches/3f509180/qt5/qt5-qtmultimedia-xcode15.patch";
@@ -184,7 +184,7 @@ let
       # See: https://bugreports.qt.io/browse/QTBUG-124375
       # Backport of: https://code.qt.io/cgit/qt/qtwebengine-chromium.git/commit/?id=a766045f65f934df3b5f1aa63bc86fbb3e003a09
       ./qtwebengine-ninja-1.12.patch
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       ./qtwebengine-darwin-no-platform-check.patch
       ./qtwebengine-mac-dont-set-dsymutil-path.patch
       ./qtwebengine-darwin-checks.patch
@@ -218,7 +218,7 @@ let
       ./qtwebkit.patch
       ./qtwebkit-icu68.patch
       ./qtwebkit-cstdint.patch
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       ./qtwebkit-darwin-no-readline.patch
       ./qtwebkit-darwin-no-qos-classes.patch
     ];
@@ -248,7 +248,7 @@ let
         inherit (srcs.qtbase) src version;
         patches = patches.qtbase;
         inherit bison cups harfbuzz libGL;
-        withGtk3 = !stdenv.isDarwin; inherit dconf gtk3;
+        withGtk3 = !stdenv.hostPlatform.isDarwin; inherit dconf gtk3;
         inherit developerBuild decryptSslTraffic;
         inherit (darwin.apple_sdk_11_0.frameworks) AGL AppKit ApplicationServices AVFoundation Carbon Cocoa CoreAudio CoreBluetooth
           CoreLocation CoreServices DiskArbitration Foundation OpenGL MetalKit IOKit;
@@ -311,7 +311,7 @@ let
         # clang is pinned to clang 15. That also makes fixing the second set of errors unnecessary.
         stdenv =
           let stdenv' = if stdenv.cc.isClang then overrideLibcxx llvmPackages_15.stdenv else stdenv;
-          in if stdenv'.isDarwin then overrideSDK stdenv' "11.0" else stdenv';
+          in if stdenv'.hostPlatform.isDarwin then overrideSDK stdenv' "11.0" else stdenv';
         inherit (srcs.qtwebengine) version;
         python = python3;
         inherit (darwin) xnu;
@@ -343,8 +343,8 @@ let
         qtscript qtsensors qtserialport qtsvg qttools qttranslations
         qtvirtualkeyboard qtwebchannel qtwebengine qtwebsockets
         qtwebview qtx11extras qtxmlpatterns qtlottie qtdatavis3d
-      ] ++ lib.optional (!stdenv.isDarwin) qtwayland
-        ++ lib.optional (stdenv.isDarwin) qtmacextras);
+      ] ++ lib.optional (!stdenv.hostPlatform.isDarwin) qtwayland
+        ++ lib.optional (stdenv.hostPlatform.isDarwin) qtmacextras);
 
       qmake = callPackage ({ qtbase }: makeSetupHook {
         name = "qmake-hook";
@@ -360,7 +360,7 @@ let
       wrapQtAppsHook = callPackage ({ makeBinaryWrapper, qtbase, qtwayland }: makeSetupHook {
         name = "wrap-qt5-apps-hook";
         propagatedBuildInputs = [ qtbase.dev makeBinaryWrapper ]
-          ++ lib.optional stdenv.isLinux qtwayland.dev;
+          ++ lib.optional stdenv.hostPlatform.isLinux qtwayland.dev;
       } ../hooks/wrap-qt-apps-hook.sh) { };
     };
 
diff --git a/pkgs/development/libraries/qt-5/modules/qt3d.nix b/pkgs/development/libraries/qt-5/modules/qt3d.nix
index f394ff6627e0..c54f4b7d7b48 100644
--- a/pkgs/development/libraries/qt-5/modules/qt3d.nix
+++ b/pkgs/development/libraries/qt-5/modules/qt3d.nix
@@ -5,5 +5,5 @@ qtModule {
   propagatedBuildInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
   # error: use of undeclared identifier 'stat64'
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-Dstat64=stat";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-Dstat64=stat";
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index 7f3079d5add5..7aef466b7937 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -18,7 +18,7 @@
 , withQttranslation ? true, qttranslations ? null
 
   # options
-, libGLSupported ? !stdenv.isDarwin
+, libGLSupported ? !stdenv.hostPlatform.isDarwin
 , libGL
   # qmake detection for libmysqlclient does not seem to work when cross compiling
 , mysqlSupport ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: ({
     libjpeg libpng
     pcre2
   ] ++ (
-    if stdenv.isDarwin then [
+    if stdenv.hostPlatform.isDarwin then [
       # TODO: move to buildInputs, this should not be propagated.
       AGL AppKit ApplicationServices AVFoundation Carbon Cocoa CoreAudio CoreBluetooth
       CoreLocation CoreServices DiskArbitration Foundation OpenGL
@@ -75,7 +75,7 @@ stdenv.mkDerivation (finalAttrs: ({
   );
 
   buildInputs = [ python3 at-spi2-core ]
-    ++ lib.optionals (!stdenv.isDarwin)
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin)
     (
       [ libinput ]
       ++ lib.optional withGtk3 gtk3
@@ -86,7 +86,7 @@ stdenv.mkDerivation (finalAttrs: ({
     ++ lib.optional (postgresql != null) postgresql;
 
   nativeBuildInputs = [ bison flex gperf lndir perl pkg-config which ]
-    ++ lib.optionals stdenv.isDarwin [ xcbuild ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   } // lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform) {
     # `qtbase` expects to find `cc` (with no prefix) in the
@@ -99,7 +99,7 @@ stdenv.mkDerivation (finalAttrs: ({
 
   # libQt5Core links calls CoreFoundation APIs that call into the system ICU. Binaries linked
   # against it will crash during build unless they can access `/usr/share/icu/icudtXXl.dat`.
-  propagatedSandboxProfile = lib.optionalString stdenv.isDarwin ''
+  propagatedSandboxProfile = lib.optionalString stdenv.hostPlatform.isDarwin ''
     (allow file-read* (subpath "/usr/share/icu"))
   '';
 
@@ -140,7 +140,7 @@ stdenv.mkDerivation (finalAttrs: ({
 
     patchShebangs ./bin
   '' + (
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
         sed -i \
             -e 's|/usr/bin/xcode-select|xcode-select|' \
             -e 's|/usr/bin/xcrun|xcrun|' \
@@ -217,7 +217,7 @@ stdenv.mkDerivation (finalAttrs: ({
       ''-DLIBRESOLV_SO="${stdenv.cc.libc.out}/lib/libresolv"''
       ''-DNIXPKGS_LIBXCURSOR="${libXcursor.out}/lib/libXcursor"''
     ] ++ lib.optional libGLSupported ''-DNIXPKGS_MESA_GL="${libGL.out}/lib/libGL"''
-    ++ lib.optional stdenv.isLinux "-DUSE_X11"
+    ++ lib.optional stdenv.hostPlatform.isLinux "-DUSE_X11"
     ++ lib.optionals (stdenv.hostPlatform.system == "x86_64-darwin") [
       # ignore "is only available on macOS 10.12.2 or newer" in obj-c code
       "-Wno-error=unguarded-availability"
@@ -318,7 +318,7 @@ stdenv.mkDerivation (finalAttrs: ({
     ''-${lib.optionalString (!buildTests) "no"}make tests''
   ]
     ++ (
-      if stdenv.isDarwin then [
+      if stdenv.hostPlatform.isDarwin then [
       "-no-fontconfig"
       "-qt-freetype"
       "-qt-libpng"
diff --git a/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix b/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix
index 81efb4bee04b..d61619613eba 100644
--- a/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtconnectivity.nix
@@ -2,11 +2,11 @@
 
 qtModule {
   pname = "qtconnectivity";
-  buildInputs = lib.optional stdenv.isLinux bluez;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux bluez;
   propagatedBuildInputs = [
     qtbase
     qtdeclarative
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     IOBluetooth
   ];
   outputs = [ "out" "dev" "bin" ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtdatavis3d.nix b/pkgs/development/libraries/qt-5/modules/qtdatavis3d.nix
index d79320ea139f..e89a735d77b8 100644
--- a/pkgs/development/libraries/qt-5/modules/qtdatavis3d.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtdatavis3d.nix
@@ -5,5 +5,5 @@ qtModule {
   propagatedBuildInputs = [ qtbase qtdeclarative ];
   outputs = [ "out" "dev" "bin" ];
   # error: use of undeclared identifier 'stat64'
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-Dstat64=stat";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-Dstat64=stat";
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtgamepad.nix b/pkgs/development/libraries/qt-5/modules/qtgamepad.nix
index 398572673171..8d0a0e2177fa 100644
--- a/pkgs/development/libraries/qt-5/modules/qtgamepad.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtgamepad.nix
@@ -3,7 +3,7 @@
 qtModule {
   pname = "qtgamepad";
   propagatedBuildInputs = [ qtbase qtdeclarative ]
-    ++ lib.optional stdenv.isDarwin GameController;
+    ++ lib.optional stdenv.hostPlatform.isDarwin GameController;
   buildInputs = [ ];
   nativeBuildInputs = [ pkg-config ];
   outputs = [ "out" "dev" "bin" ];
diff --git a/pkgs/development/libraries/qt-5/modules/qtlocation.nix b/pkgs/development/libraries/qt-5/modules/qtlocation.nix
index 338911a5afd5..35627af0c685 100644
--- a/pkgs/development/libraries/qt-5/modules/qtlocation.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtlocation.nix
@@ -4,7 +4,7 @@ qtModule {
   pname = "qtlocation";
   propagatedBuildInputs = [ qtbase qtmultimedia ];
   outputs = [ "bin" "out" "dev" ];
-  qmakeFlags = lib.optionals stdenv.isDarwin [
+  qmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
      # boost uses std::auto_ptr which has been disabled in clang with libcxx
      # This flag re-enables this feature
      # https://libcxx.llvm.org/docs/UsingLibcxx.html#c-17-specific-configuration-macros
diff --git a/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix b/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
index d5dc16c52823..0346ca23c5e2 100644
--- a/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtmultimedia.nix
@@ -17,8 +17,8 @@ qtModule {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ gstreamer gst-plugins-base ]
     # https://github.com/NixOS/nixpkgs/pull/169336 regarding libpulseaudio
-    ++ lib.optionals stdenv.isLinux [ libpulseaudio alsa-lib wayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libpulseaudio alsa-lib wayland ];
   outputs = [ "bin" "dev" "out" ];
   qmakeFlags = [ "GST_VERSION=1.0" ];
-  NIX_LDFLAGS = lib.optionalString (stdenv.isDarwin) "-lobjc";
+  NIX_LDFLAGS = lib.optionalString (stdenv.hostPlatform.isDarwin) "-lobjc";
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtserialport.nix b/pkgs/development/libraries/qt-5/modules/qtserialport.nix
index 7907f91b986b..3d5c00a3575e 100644
--- a/pkgs/development/libraries/qt-5/modules/qtserialport.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtserialport.nix
@@ -3,5 +3,5 @@
 qtModule {
   pname = "qtserialport";
   propagatedBuildInputs = [ qtbase ];
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isLinux "-DNIXPKGS_LIBUDEV=\"${lib.getLib systemd}/lib/libudev\"";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isLinux "-DNIXPKGS_LIBUDEV=\"${lib.getLib systemd}/lib/libudev\"";
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtspeech.nix b/pkgs/development/libraries/qt-5/modules/qtspeech.nix
index 17bc16dab4fc..d60a12f3854d 100644
--- a/pkgs/development/libraries/qt-5/modules/qtspeech.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtspeech.nix
@@ -3,7 +3,7 @@
 qtModule {
   pname = "qtspeech";
   propagatedBuildInputs = [ ];
-  buildInputs = lib.optionals stdenv.isLinux [ speechd-minimal ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ speechd-minimal ];
   nativeBuildInputs = [ pkg-config ];
   outputs = [ "out" "dev" ];
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qttools.nix b/pkgs/development/libraries/qt-5/modules/qttools.nix
index 37e4348ed2c2..b728620362f9 100644
--- a/pkgs/development/libraries/qt-5/modules/qttools.nix
+++ b/pkgs/development/libraries/qt-5/modules/qttools.nix
@@ -32,11 +32,11 @@ qtModule {
     "bin/qthelpconverter"
     "bin/lprodump"
     "bin/qdistancefieldgenerator"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "bin/macdeployqt"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && qtdeclarative != null) ''-DNIXPKGS_QMLIMPORTSCANNER="${qtdeclarative.dev}/bin/qmlimportscanner"'';
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && qtdeclarative != null) ''-DNIXPKGS_QMLIMPORTSCANNER="${qtdeclarative.dev}/bin/qmlimportscanner"'';
 
   setupHook = ../hooks/qttools-setup-hook.sh;
 }
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
index 1a63c9508c05..75149cfb5a8b 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
@@ -29,7 +29,7 @@
 , lib, stdenv
 , version ? null
 , qtCompatVersion
-, pipewireSupport ? stdenv.isLinux
+, pipewireSupport ? stdenv.hostPlatform.isLinux
 , pipewire
 , postPatch ? ""
 , nspr
@@ -65,7 +65,7 @@ qtModule ({
     pkgsBuildBuild.pkg-config
     (lib.getDev pkgsBuildTarget.targetPackages.qt5.qtquickcontrols)
     pkg-config-wrapped-without-prefix
-  ] ++ lib.optional stdenv.isDarwin xcbuild;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin xcbuild;
   doCheck = true;
   outputs = [ "bin" "dev" "out" ];
 
@@ -135,7 +135,7 @@ qtModule ({
   # Prevent Chromium build script from making the path to `clang` relative to
   # the build directory.  `clang_base_path` is the value of `QMAKE_CLANG_DIR`
   # from `src/core/config/mac_osx.pri`.
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace ./src/3rdparty/chromium/build/toolchain/mac/BUILD.gn \
       --replace 'prefix = rebase_path("$clang_base_path/bin/", root_build_dir)' 'prefix = "$clang_base_path/bin/"'
   ''
@@ -148,13 +148,13 @@ qtModule ({
       src/core/web_engine_library_info.cpp
   ''
   # Patch library paths in Chromium sources
-  + lib.optionalString (!stdenv.isDarwin) ''
+  + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     sed -i -e '/lib_loader.*Load/s!"\(libudev\.so\)!"${lib.getLib systemd}/lib/\1!' \
       src/3rdparty/chromium/device/udev_linux/udev?_loader.cc
 
     sed -i -e '/libpci_loader.*Load/s!"\(libpci\.so\)!"${pciutils}/lib/\1!' \
       src/3rdparty/chromium/gpu/config/gpu_info_collector_linux.cc
-  '' + lib.optionalString stdenv.isDarwin (''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin (''
     substituteInPlace src/buildtools/config/mac_osx.pri \
       --replace 'QMAKE_CLANG_DIR = "/usr"' 'QMAKE_CLANG_DIR = "${stdenv.cc}"'
 
@@ -233,7 +233,7 @@ qtModule ({
 
     libevent
     ffmpeg_7
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     dbus zlib minizip snappy nss protobuf jsoncpp
 
     # Audio formats
@@ -257,7 +257,7 @@ qtModule ({
 
   # FIXME These dependencies shouldn't be needed but can't find a way
   # around it. Chromium pulls this in while bootstrapping GN.
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libobjc
     cctools
 
@@ -287,7 +287,7 @@ qtModule ({
     libunwind
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     cups
     libpm
     sandbox
@@ -313,7 +313,7 @@ qtModule ({
 
   postInstall = lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
     mkdir -p $out/libexec
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     cat > $out/libexec/qt.conf <<EOF
     [Paths]
     Prefix = ..
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
index bd05954ddb35..3382bca0f982 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
@@ -23,13 +23,13 @@ in
 qtModule {
   pname = "qtwebkit";
   propagatedBuildInputs = [ qtbase qtdeclarative qtlocation qtsensors qtwebchannel ]
-    ++ lib.optional stdenv.isDarwin qtmultimedia;
+    ++ lib.optional stdenv.hostPlatform.isDarwin qtmultimedia;
   buildInputs = [ fontconfig libwebp libxml2 libxslt sqlite glib gst_all_1.gstreamer gst_all_1.gst-plugins-base hyphen ]
-    ++ lib.optionals stdenv.isDarwin [ ICU OpenGL ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ ICU OpenGL ];
   nativeBuildInputs = [ bison flex gdb gperf perl pkg-config python3 ruby cmake ];
 
   cmakeFlags = [ "-DPORT=Qt" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-DQt5Multimedia_DIR=${lib.getDev qtmultimedia}/lib/cmake/Qt5Multimedia"
       "-DQt5MultimediaWidgets_DIR=${lib.getDev qtmultimedia}/lib/cmake/Qt5MultimediaWidgets"
       "-DMACOS_FORCE_SYSTEM_XML_LIBRARIES=OFF"
@@ -42,13 +42,13 @@ qtModule {
   # with gcc8, -Wclass-memaccess became part of -Wall and this too exceeds the logging limit
   ++ lib.optional stdenv.cc.isGNU "-Wno-class-memaccess"
   # with clang this warning blows the log over Hydra's limit
-  ++ lib.optional stdenv.isDarwin "-Wno-inconsistent-missing-override"
-  ++ lib.optional (!stdenv.isDarwin) ''-DNIXPKGS_LIBUDEV="${lib.getLib systemd}/lib/libudev"'');
+  ++ lib.optional stdenv.hostPlatform.isDarwin "-Wno-inconsistent-missing-override"
+  ++ lib.optional (!stdenv.hostPlatform.isDarwin) ''-DNIXPKGS_LIBUDEV="${lib.getLib systemd}/lib/libudev"'');
 
   doCheck = false; # fails 13 out of 13 tests (ctest)
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$out"/libexec/*
   '';
 
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebview.nix b/pkgs/development/libraries/qt-5/modules/qtwebview.nix
index fd8755390973..9b1a290ece01 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebview.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebview.nix
@@ -3,10 +3,10 @@
 qtModule {
   pname = "qtwebview";
   propagatedBuildInputs = [ qtdeclarative qtwebengine ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     WebKit
   ];
   outputs = [ "out" "dev" "bin" ];
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework CoreFoundation -framework WebKit";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework CoreFoundation -framework WebKit";
 }
diff --git a/pkgs/development/libraries/qt-6/default.nix b/pkgs/development/libraries/qt-6/default.nix
index 83f9268624cc..8625dadf5233 100644
--- a/pkgs/development/libraries/qt-6/default.nix
+++ b/pkgs/development/libraries/qt-6/default.nix
@@ -28,7 +28,7 @@ let
         inherit (self) qtModule;
         inherit srcs python3;
         stdenv =
-          if stdenv.isDarwin
+          if stdenv.hostPlatform.isDarwin
           then overrideSDK stdenv { darwinMinVersion = "11.0"; darwinSdkVersion = "11.0"; }
           else stdenv;
       });
@@ -106,7 +106,7 @@ let
             qtwebengine
             qtwebsockets
             qtwebview
-          ] ++ lib.optionals (!stdenv.isDarwin) [ qtwayland libglvnd ]))
+          ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ qtwayland libglvnd ]))
         { };
 
       qt3d = callPackage ./modules/qt3d.nix { };
@@ -163,7 +163,7 @@ let
         qtModule = callPackage
           ({ qtModule }: qtModule.override {
             stdenv =
-              if stdenv.isDarwin
+              if stdenv.hostPlatform.isDarwin
               then overrideSDK stdenv { darwinMinVersion = "11.0"; darwinSdkVersion = "11.0"; }
               else stdenv;
           })
diff --git a/pkgs/development/libraries/qt-6/modules/qtbase.nix b/pkgs/development/libraries/qt-6/modules/qtbase.nix
index e738aba60560..68ef06921ac9 100644
--- a/pkgs/development/libraries/qt-6/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtbase.nix
@@ -250,7 +250,7 @@ stdenv.mkDerivation rec {
     moveToOutput      "mkspecs/modules" "$dev"
     fixQtModulePaths  "$dev/mkspecs/modules"
     fixQtBuiltinPaths "$out" '*.pr?'
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
 
     # FIXME: not sure why this isn't added automatically?
     patchelf --add-rpath "${libmysqlclient}/lib/mariadb" $out/${qtPluginPrefix}/sqldrivers/libqsqlmysql.so
diff --git a/pkgs/development/libraries/qt-6/modules/qtwebengine.nix b/pkgs/development/libraries/qt-6/modules/qtwebengine.nix
index 8da3b7b62842..08c061e10d7a 100644
--- a/pkgs/development/libraries/qt-6/modules/qtwebengine.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtwebengine.nix
@@ -326,6 +326,6 @@ qtModule {
     # 1 hour on 32x3.6GHz -> maybe 12 hours on 4x2.4GHz
     timeout = 24 * 3600;
     # Not compatible with macOS 11 without massive patching
-    broken = stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "12";
+    broken = stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "12";
   };
 }
diff --git a/pkgs/development/libraries/qtkeychain/default.nix b/pkgs/development/libraries/qtkeychain/default.nix
index 9007129cecf5..b6744692bbe8 100644
--- a/pkgs/development/libraries/qtkeychain/default.nix
+++ b/pkgs/development/libraries/qtkeychain/default.nix
@@ -29,12 +29,12 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake ]
-    ++ lib.optionals (!stdenv.isDarwin) [ pkg-config ] # for finding libsecret
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ pkg-config ] # for finding libsecret
   ;
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ libsecret ]
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ libsecret ]
     ++ [ qtbase qttools ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     Security
   ];
diff --git a/pkgs/development/libraries/qtpbfimageplugin/default.nix b/pkgs/development/libraries/qtpbfimageplugin/default.nix
index 94dc1646513c..5005ab8243d4 100644
--- a/pkgs/development/libraries/qtpbfimageplugin/default.nix
+++ b/pkgs/development/libraries/qtpbfimageplugin/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     # Fix plugin dir
     substituteInPlace pbfplugin.pro \
       --replace "\$\$[QT_INSTALL_PLUGINS]" "$out/$qtPluginPrefix"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix darwin build
     substituteInPlace pbfplugin.pro \
       --replace '$$PROTOBUF/include' '${protobuf}/include' \
diff --git a/pkgs/development/libraries/quarto/default.nix b/pkgs/development/libraries/quarto/default.nix
index 11350128b4aa..a3a633af6c94 100644
--- a/pkgs/development/libraries/quarto/default.nix
+++ b/pkgs/development/libraries/quarto/default.nix
@@ -63,7 +63,7 @@ stdenv.mkDerivation (final: {
 
   passthru.tests = {
     quarto-check = runCommand "quarto-check" {
-      nativeBuildInputs = lib.optionals stdenv.isDarwin [ sysctl ];
+      nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ sysctl ];
     } ''
       export HOME="$(mktemp -d)"
       ${quarto}/bin/quarto check
diff --git a/pkgs/development/libraries/quazip/default.nix b/pkgs/development/libraries/quazip/default.nix
index c3f1f7a7834a..b2fcad6cab87 100644
--- a/pkgs/development/libraries/quazip/default.nix
+++ b/pkgs/development/libraries/quazip/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ zlib qtbase ];
   propagatedBuildInputs = [ qt5compat ];
   nativeBuildInputs = [ cmake ]
-    ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+    ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   dontWrapQtApps = true;
 
diff --git a/pkgs/development/libraries/quickfix/default.nix b/pkgs/development/libraries/quickfix/default.nix
index 0c327d0d5e59..bd4612c8eec1 100644
--- a/pkgs/development/libraries/quickfix/default.nix
+++ b/pkgs/development/libraries/quickfix/default.nix
@@ -55,6 +55,6 @@ stdenv.mkDerivation rec {
     homepage = "http://www.quickfixengine.org";
     license = licenses.free; # similar to BSD 4-clause
     maintainers = with maintainers; [ bhipple ];
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/libraries/quictls/default.nix b/pkgs/development/libraries/quictls/default.nix
index 49dfc94993e4..1e3cb69d1f82 100644
--- a/pkgs/development/libraries/quictls/default.nix
+++ b/pkgs/development/libraries/quictls/default.nix
@@ -119,7 +119,7 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optional enableSSL3 "enable-ssl3"
   # We select KTLS here instead of the configure-time detection (which we patch out).
   # KTLS should work on FreeBSD 13+ as well, so we could enable it if someone tests it.
-  ++ lib.optional (stdenv.isLinux && lib.versionAtLeast finalAttrs.version "3.0.0") "enable-ktls"
+  ++ lib.optional (stdenv.hostPlatform.isLinux && lib.versionAtLeast finalAttrs.version "3.0.0") "enable-ktls"
   ++ lib.optional stdenv.hostPlatform.isAarch64 "no-afalgeng"
   # OpenSSL needs a specific `no-shared` configure flag.
   # See https://wiki.openssl.org/index.php/Compilation_and_Installation#Configure_Options
diff --git a/pkgs/development/libraries/qwt/default.nix b/pkgs/development/libraries/qwt/default.nix
index dec84c1c4955..814e8f0252c1 100644
--- a/pkgs/development/libraries/qwt/default.nix
+++ b/pkgs/development/libraries/qwt/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   propagatedBuildInputs = [ qtbase qtsvg qttools ];
-  nativeBuildInputs = [ qmake ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+  nativeBuildInputs = [ qmake ] ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
 
   postPatch = ''
     sed -e "s|QWT_INSTALL_PREFIX.*=.*|QWT_INSTALL_PREFIX = $out|g" -i qwtconfig.pri
diff --git a/pkgs/development/libraries/range-v3/default.nix b/pkgs/development/libraries/range-v3/default.nix
index 3ef599887eb4..a7e5fe6eb263 100644
--- a/pkgs/development/libraries/range-v3/default.nix
+++ b/pkgs/development/libraries/range-v3/default.nix
@@ -16,9 +16,9 @@ stdenv.mkDerivation rec {
   # Building the tests currently fails on AArch64 due to internal compiler
   # errors (with GCC 9.2):
   cmakeFlags = [ "-DRANGES_ENABLE_WERROR=OFF" ]
-    ++ lib.optional stdenv.isAarch64 "-DRANGE_V3_TESTS=OFF";
+    ++ lib.optional stdenv.hostPlatform.isAarch64 "-DRANGE_V3_TESTS=OFF";
 
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
   checkTarget = "test";
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/rapidjson/default.nix b/pkgs/development/libraries/rapidjson/default.nix
index 9aa239458502..8e72b7748d65 100644
--- a/pkgs/development/libraries/rapidjson/default.nix
+++ b/pkgs/development/libraries/rapidjson/default.nix
@@ -63,7 +63,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeFeature "CMAKE_CXX_FLAGS_RELEASE" "-Wno-error")
   ];
 
-  doCheck = !(stdenv.hostPlatform.isStatic || stdenv.isDarwin);
+  doCheck = !(stdenv.hostPlatform.isStatic || stdenv.hostPlatform.isDarwin);
 
   nativeCheckInputs = [
     valgrind
diff --git a/pkgs/development/libraries/raylib/default.nix b/pkgs/development/libraries/raylib/default.nix
index 2cdde4f2b726..5c1b7d1dab0a 100644
--- a/pkgs/development/libraries/raylib/default.nix
+++ b/pkgs/development/libraries/raylib/default.nix
@@ -37,16 +37,16 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optional stdenv.isLinux autoPatchelfHook;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
 
   buildInputs = [ glfw ]
-    ++ lib.optionals stdenv.isLinux [ mesa libXi libXcursor libXrandr libXinerama ]
-    ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ mesa libXi libXcursor libXrandr libXinerama ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa ]
     ++ lib.optional alsaSupport alsa-lib
     ++ lib.optional pulseSupport libpulseaudio;
 
-  propagatedBuildInputs = lib.optionals stdenv.isLinux [ libGLU libX11 ]
-    ++ lib.optionals stdenv.isDarwin [ OpenGL ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libGLU libX11 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ OpenGL ];
 
   # https://github.com/raysan5/raylib/wiki/CMake-Build-Options
   cmakeFlags = [
@@ -70,7 +70,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # fix libasound.so/libpulse.so not being found
-  appendRunpaths = lib.optionals stdenv.isLinux [
+  appendRunpaths = lib.optionals stdenv.hostPlatform.isLinux [
     (lib.makeLibraryPath (lib.optional alsaSupport alsa-lib ++ lib.optional pulseSupport libpulseaudio))
   ];
 
diff --git a/pkgs/development/libraries/retro-gtk/default.nix b/pkgs/development/libraries/retro-gtk/default.nix
index 69eb4b0cd12d..074985308244 100644
--- a/pkgs/development/libraries/retro-gtk/default.nix
+++ b/pkgs/development/libraries/retro-gtk/default.nix
@@ -72,6 +72,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     maintainers = [ maintainers.DamienCassou ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/retro-gtk.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/retro-gtk.x86_64-darwin
   };
 }
diff --git a/pkgs/development/libraries/rlottie/default.nix b/pkgs/development/libraries/rlottie/default.nix
index 541c805bba5b..2243e482a569 100644
--- a/pkgs/development/libraries/rlottie/default.nix
+++ b/pkgs/development/libraries/rlottie/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     (lib.cmakeFeature "LIB_INSTALL_DIR" "${placeholder "out"}/lib")
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) "-U__ARM_NEON__";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-U__ARM_NEON__";
 
   meta = with lib; {
     homepage = "https://github.com/Samsung/rlottie";
diff --git a/pkgs/development/libraries/rnnoise-plugin/default.nix b/pkgs/development/libraries/rnnoise-plugin/default.nix
index d41459e25ead..13107bfcb13b 100644
--- a/pkgs/development/libraries/rnnoise-plugin/default.nix
+++ b/pkgs/development/libraries/rnnoise-plugin/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake pkg-config ];
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     # Ubsan seems to be broken on aarch64-darwin, it produces linker errors similar to https://github.com/NixOS/nixpkgs/issues/140751
     ./disable-ubsan.patch
   ];
@@ -38,9 +38,9 @@ stdenv.mkDerivation rec {
       pcre
       xorg.libX11
       xorg.libXrandr
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       webkitgtk
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       WebKit
       MetalKit
       CoreAudioKit
diff --git a/pkgs/development/libraries/rocksdb/default.nix b/pkgs/development/libraries/rocksdb/default.nix
index b81061639d79..fb4cc16cd7eb 100644
--- a/pkgs/development/libraries/rocksdb/default.nix
+++ b/pkgs/development/libraries/rocksdb/default.nix
@@ -11,7 +11,7 @@
 , windows
 , enableJemalloc ? false
 , jemalloc
-, enableLiburing ? stdenv.isLinux
+, enableLiburing ? stdenv.hostPlatform.isLinux
 , liburing
 , enableShared ? !stdenv.hostPlatform.isStatic
 , sse42Support ? stdenv.hostPlatform.sse4_2Support
@@ -87,9 +87,9 @@ stdenv.mkDerivation (finalAttrs: {
   preInstall = ''
     mkdir -p $tools/bin
     cp tools/{ldb,sst_dump}${stdenv.hostPlatform.extensions.executable} $tools/bin/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     ls -1 $tools/bin/* | xargs -I{} install_name_tool -change "@rpath/librocksdb.${lib.versions.major finalAttrs.version}.dylib" $out/lib/librocksdb.dylib {}
-  '' + lib.optionalString (stdenv.isLinux && enableShared) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isLinux && enableShared) ''
     ls -1 $tools/bin/* | xargs -I{} patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib {}
   '';
 
diff --git a/pkgs/development/libraries/rttr/default.nix b/pkgs/development/libraries/rttr/default.nix
index 10a16dd3f6b4..de4d81918cd0 100644
--- a/pkgs/development/libraries/rttr/default.nix
+++ b/pkgs/development/libraries/rttr/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "C++ Reflection Library";
     homepage = "https://www.rttr.org";
     license = licenses.mit;
diff --git a/pkgs/development/libraries/rubberband/default.nix b/pkgs/development/libraries/rubberband/default.nix
index 861de40a5b55..d5acb98c22a4 100644
--- a/pkgs/development/libraries/rubberband/default.nix
+++ b/pkgs/development/libraries/rubberband/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkg-config meson ninja jdk_headless ];
-  buildInputs = [ libsamplerate libsndfile fftw vamp-plugin-sdk ladspaH lv2 ] ++ lib.optionals stdenv.isDarwin
+  buildInputs = [ libsamplerate libsndfile fftw vamp-plugin-sdk ladspaH lv2 ] ++ lib.optionals stdenv.hostPlatform.isDarwin
     (with darwin.apple_sdk.frameworks; [Accelerate CoreGraphics CoreVideo]);
   makeFlags = [ "AR:=$(AR)" ];
 
diff --git a/pkgs/development/libraries/rustls-ffi/default.nix b/pkgs/development/libraries/rustls-ffi/default.nix
index d5d736dd2225..92dffbc2682f 100644
--- a/pkgs/development/libraries/rustls-ffi/default.nix
+++ b/pkgs/development/libraries/rustls-ffi/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-IDIWN5g1aaE6SDdXSm4WYK6n+BpuypPYQITuDj1WJEc=";
   };
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoLock.lockFile = ./Cargo.lock;
   postPatch = ''
diff --git a/pkgs/development/libraries/schroedinger/default.nix b/pkgs/development/libraries/schroedinger/default.nix
index b4e8831b3177..698ac7986204 100644
--- a/pkgs/development/libraries/schroedinger/default.nix
+++ b/pkgs/development/libraries/schroedinger/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config autoreconfHook ];
   buildInputs = [ orc ];
 
-  doCheck = (!stdenv.isDarwin);
+  doCheck = (!stdenv.hostPlatform.isDarwin);
 
   patchFlags = [ "-p0" ];
   patches = [
diff --git a/pkgs/development/libraries/science/astronomy/indilib/default.nix b/pkgs/development/libraries/science/astronomy/indilib/default.nix
index 78ba7f42fd50..5d7137abac2c 100644
--- a/pkgs/development/libraries/science/astronomy/indilib/default.nix
+++ b/pkgs/development/libraries/science/astronomy/indilib/default.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation (finalAttrs: {
   # Socket address collisions between tests
   enableParallelChecking = false;
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in $out/lib/udev/rules.d/*.rules
     do
       substituteInPlace $f --replace "/bin/sh" "${bash}/bin/sh" \
diff --git a/pkgs/development/libraries/science/biology/bpp-core/default.nix b/pkgs/development/libraries/science/biology/bpp-core/default.nix
index 0d0e3c114920..673cebe59e8e 100644
--- a/pkgs/development/libraries/science/biology/bpp-core/default.nix
+++ b/pkgs/development/libraries/science/biology/bpp-core/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   # of form /nix/store/.../nix/store/.../include,
   # probably due to relative vs absolute path issue
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://github.com/BioPP/bpp-core";
diff --git a/pkgs/development/libraries/science/biology/bpp-phyl/default.nix b/pkgs/development/libraries/science/biology/bpp-phyl/default.nix
index 0b18dbfcf19a..624251617479 100644
--- a/pkgs/development/libraries/science/biology/bpp-phyl/default.nix
+++ b/pkgs/development/libraries/science/biology/bpp-phyl/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
       --replace 'set(_IMPORT_PREFIX' '#set(_IMPORT_PREFIX'
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = bpp-core.meta // {
     homepage = "https://github.com/BioPP/bpp-phyl";
diff --git a/pkgs/development/libraries/science/biology/bpp-popgen/default.nix b/pkgs/development/libraries/science/biology/bpp-popgen/default.nix
index 2cb89b4bbd38..f7662766fb2c 100644
--- a/pkgs/development/libraries/science/biology/bpp-popgen/default.nix
+++ b/pkgs/development/libraries/science/biology/bpp-popgen/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   # of form /nix/store/.../nix/store/.../include,
   # probably due to relative vs absolute path issue
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = bpp-core.meta // {
     homepage = "https://github.com/BioPP/bpp-popgen";
diff --git a/pkgs/development/libraries/science/biology/bpp-seq/default.nix b/pkgs/development/libraries/science/biology/bpp-seq/default.nix
index 2f6fbf9e362c..0699c5316835 100644
--- a/pkgs/development/libraries/science/biology/bpp-seq/default.nix
+++ b/pkgs/development/libraries/science/biology/bpp-seq/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   # of form /nix/store/.../nix/store/.../include,
   # probably due to relative vs absolute path issue
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = bpp-core.meta // {
     homepage = "https://github.com/BioPP/bpp-seq";
diff --git a/pkgs/development/libraries/science/biology/elastix/default.nix b/pkgs/development/libraries/science/biology/elastix/default.nix
index 44e76244c987..46b297722feb 100644
--- a/pkgs/development/libraries/science/biology/elastix/default.nix
+++ b/pkgs/development/libraries/science/biology/elastix/default.nix
@@ -19,9 +19,9 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ itk ] ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+  buildInputs = [ itk ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
-  doCheck = !stdenv.isDarwin; # usual dynamic linker issues
+  doCheck = !stdenv.hostPlatform.isDarwin; # usual dynamic linker issues
 
   meta = with lib; {
     homepage = "https://elastix.lumc.nl";
diff --git a/pkgs/development/libraries/science/biology/gifticlib/default.nix b/pkgs/development/libraries/science/biology/gifticlib/default.nix
index 306324129cbd..b305df08860b 100644
--- a/pkgs/development/libraries/science/biology/gifticlib/default.nix
+++ b/pkgs/development/libraries/science/biology/gifticlib/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ expat nifticlib zlib ];
 
   # without the test data, this is only a few basic tests
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   checkPhase = ''
     runHook preCheck
     ctest -LE 'NEEDS_DATA'
diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 744d565eddcd..06503bbc7ddd 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     export OMP_NUM_THREADS=2
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libblas.dylib ${blas}/lib/libblas.dylib $out/lib/libarpack.dylib
   '';
 
diff --git a/pkgs/development/libraries/science/math/blas/default.nix b/pkgs/development/libraries/science/math/blas/default.nix
index 4431ab63c7b7..fcb78767678e 100644
--- a/pkgs/development/libraries/science/math/blas/default.nix
+++ b/pkgs/development/libraries/science/math/blas/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     ln -s $out/lib/libblas64${canonicalExtension} $out/lib/libblas${canonicalExtension}
   '';
 
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for fn in $(find $out/lib -name "*.so*"); do
       if [ -L "$fn" ]; then continue; fi
       install_name_tool -id "$fn" "$fn"
diff --git a/pkgs/development/libraries/science/math/bonmin/default.nix b/pkgs/development/libraries/science/math/bonmin/default.nix
index a389c602b1b6..1cf64101face 100644
--- a/pkgs/development/libraries/science/math/bonmin/default.nix
+++ b/pkgs/development/libraries/science/math/bonmin/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     zlib
   ];
 
-  configureFlags = lib.optionals stdenv.isDarwin [
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--with-asl-lib=-lipoptamplinterface -lamplsolver"
   ];
 
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
   checkTarget = "test";
 
   # ignore one failing test
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace test/Makefile.in --replace-fail \
       "./unitTest\''$(EXEEXT)" \
       ""
diff --git a/pkgs/development/libraries/science/math/clblas/default.nix b/pkgs/development/libraries/science/math/clblas/default.nix
index 910c40a4e0c0..17dddf901819 100644
--- a/pkgs/development/libraries/science/math/clblas/default.nix
+++ b/pkgs/development/libraries/science/math/clblas/default.nix
@@ -46,15 +46,15 @@ stdenv.mkDerivation rec {
   buildInputs = [
     blas
     boost
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     ocl-icd
     opencl-headers
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Accelerate
     CoreGraphics
     CoreVideo
   ];
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     OpenCL
   ];
 
diff --git a/pkgs/development/libraries/science/math/faiss/default.nix b/pkgs/development/libraries/science/math/faiss/default.nix
index 5804c7d627e9..a8e697132e90 100644
--- a/pkgs/development/libraries/science/math/faiss/default.nix
+++ b/pkgs/development/libraries/science/math/faiss/default.nix
@@ -149,6 +149,6 @@ stdenv.mkDerivation {
     platforms = lib.platforms.unix;
     maintainers = with lib.maintainers; [ SomeoneSerge ];
     # error: use of undeclared identifier 'SWIGTYPE_p_long'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/science/math/itpp/default.nix b/pkgs/development/libraries/science/math/itpp/default.nix
index a1a1ed8a69bc..bcfe423630aa 100644
--- a/pkgs/development/libraries/science/math/itpp/default.nix
+++ b/pkgs/development/libraries/science/math/itpp/default.nix
@@ -49,6 +49,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3;
     platforms = platforms.unix;
     maintainers = [ ];
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/itpp.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/itpp.x86_64-darwin
   };
 }
diff --git a/pkgs/development/libraries/science/math/libamplsolver/default.nix b/pkgs/development/libraries/science/math/libamplsolver/default.nix
index f74808462ae1..5eaa3cf54915 100644
--- a/pkgs/development/libraries/science/math/libamplsolver/default.nix
+++ b/pkgs/development/libraries/science/math/libamplsolver/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     install -D -m 0644 *${stdenv.hostPlatform.extensions.sharedLibrary}* -t $out/lib
     install -D -m 0644 *.a -t $out/lib
     popd
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libamplsolver.dylib $out/lib/libamplsolver.dylib
   '' + ''
     runHook postInstall
diff --git a/pkgs/development/libraries/science/math/liblapack/default.nix b/pkgs/development/libraries/science/math/liblapack/default.nix
index 595ba2aa5713..def5379d27c8 100644
--- a/pkgs/development/libraries/science/math/liblapack/default.nix
+++ b/pkgs/development/libraries/science/math/liblapack/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ gfortran cmake ];
 
   # Configure stage fails on aarch64-darwin otherwise, due to either clang 11 or gfortran 10.
-  hardeningDisable = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ "stackprotector" ];
+  hardeningDisable = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ "stackprotector" ];
 
   cmakeFlags = [
     "-DCMAKE_Fortran_FLAGS=-fPIC"
@@ -62,7 +62,7 @@ stdenv.mkDerivation (finalAttrs: {
   #
   # Upstream issue to track:
   # * https://github.com/Reference-LAPACK/lapack/issues/440
-  ctestArgs = lib.optionalString stdenv.isDarwin "-E '^(CBLAS-(x[sdcz]cblat[23]))$'";
+  ctestArgs = lib.optionalString stdenv.hostPlatform.isDarwin "-E '^(CBLAS-(x[sdcz]cblat[23]))$'";
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/development/libraries/science/math/liblbfgs/default.nix b/pkgs/development/libraries/science/math/liblbfgs/default.nix
index 26a1932bd192..d429c4c1f703 100644
--- a/pkgs/development/libraries/science/math/liblbfgs/default.nix
+++ b/pkgs/development/libraries/science/math/liblbfgs/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Library of Limited-memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS)";
     homepage = "http://www.chokkan.org/software/liblbfgs/";
     license = lib.licenses.mit;
diff --git a/pkgs/development/libraries/science/math/libtorch/bin.nix b/pkgs/development/libraries/science/math/libtorch/bin.nix
index 92050cd17283..f8e0dcff2bc1 100644
--- a/pkgs/development/libraries/science/math/libtorch/bin.nix
+++ b/pkgs/development/libraries/science/math/libtorch/bin.nix
@@ -23,7 +23,7 @@ let
   device = if cudaSupport then "cuda" else "cpu";
   srcs = import ./binary-hashes.nix version;
   unavailable = throw "libtorch is not available for this platform";
-  libcxx-for-libtorch = if stdenv.isDarwin then libcxx else stdenv.cc.cc.lib;
+  libcxx-for-libtorch = if stdenv.hostPlatform.isDarwin then libcxx else stdenv.cc.cc.lib;
 in stdenv.mkDerivation {
   inherit version;
   pname = "libtorch";
@@ -31,7 +31,7 @@ in stdenv.mkDerivation {
   src = fetchzip srcs."${stdenv.hostPlatform.system}-${device}" or unavailable;
 
   nativeBuildInputs =
-    if stdenv.isDarwin then [ fixDarwinDylibNames ]
+    if stdenv.hostPlatform.isDarwin then [ fixDarwinDylibNames ]
     else [ patchelf ] ++ lib.optionals cudaSupport [ addDriverRunpath ];
 
   dontBuild = true;
@@ -60,7 +60,7 @@ in stdenv.mkDerivation {
 
   postFixup = let
     rpath = lib.makeLibraryPath [ stdenv.cc.cc.lib ];
-  in lib.optionalString stdenv.isLinux ''
+  in lib.optionalString stdenv.hostPlatform.isLinux ''
     find $out/lib -type f \( -name '*.so' -or -name '*.so.*' \) | while read lib; do
       echo "setting rpath for $lib..."
       patchelf --set-rpath "${rpath}:$out/lib" "$lib"
@@ -68,7 +68,7 @@ in stdenv.mkDerivation {
         addDriverRunpath "$lib"
       ''}
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in $out/lib/*.dylib; do
         otool -L $f
     done
diff --git a/pkgs/development/libraries/science/math/m4rie/default.nix b/pkgs/development/libraries/science/math/m4rie/default.nix
index ac513297f159..0cda439404bb 100644
--- a/pkgs/development/libraries/science/math/m4rie/default.nix
+++ b/pkgs/development/libraries/science/math/m4rie/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   # does not compile correctly with -O2 on LLVM clang; see
   # https://bitbucket.org/malb/m4rie/issues/23/trying-to-compile-on-apple-m1
-  makeFlags = [] ++ lib.optionals stdenv.isDarwin [ "CFLAGS=-O0" ];
+  makeFlags = [] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "CFLAGS=-O0" ];
   nativeBuildInputs = [
     autoreconfHook
   ];
diff --git a/pkgs/development/libraries/science/math/mkl/default.nix b/pkgs/development/libraries/science/math/mkl/default.nix
index 607b6c89e40d..dc8b674f5c26 100644
--- a/pkgs/development/libraries/science/math/mkl/default.nix
+++ b/pkgs/development/libraries/science/math/mkl/default.nix
@@ -20,7 +20,7 @@ let
   version = "${mklVersion}.${rel}";
 
   mklVersion = "2023.1.0";
-  rel = if stdenvNoCC.isDarwin then "43558" else "46342";
+  rel = if stdenvNoCC.hostPlatform.isDarwin then "43558" else "46342";
 
   # Intel openmp uses its own versioning.
   openmpVersion = "2023.1.0";
@@ -66,17 +66,17 @@ in stdenvNoCC.mkDerivation ({
   pname = "mkl";
   inherit version;
 
-  dontUnpack = stdenvNoCC.isLinux;
+  dontUnpack = stdenvNoCC.hostPlatform.isLinux;
 
-  sourceRoot = if stdenvNoCC.isDarwin then "." else null;
+  sourceRoot = if stdenvNoCC.hostPlatform.isDarwin then "." else null;
 
-  nativeBuildInputs = [ validatePkgConfig ] ++ (if stdenvNoCC.isDarwin
+  nativeBuildInputs = [ validatePkgConfig ] ++ (if stdenvNoCC.hostPlatform.isDarwin
     then
       [ _7zz cctools ]
     else
       [ rpmextract ]);
 
-  buildPhase = if stdenvNoCC.isDarwin then ''
+  buildPhase = if stdenvNoCC.hostPlatform.isDarwin then ''
     for f in bootstrapper.app/Contents/Resources/packages/*/cupPayload.cup; do
       tar -xf $f
     done
@@ -110,9 +110,9 @@ in stdenvNoCC.mkDerivation ({
 
     # Dynamic libraries
     mkdir -p $out/lib
-    cp -a opt/intel/oneapi/mkl/${mklVersion}/lib/${lib.optionalString stdenvNoCC.isLinux "intel64"}/*${shlibExt}* $out/lib
-    cp -a opt/intel/oneapi/compiler/${mklVersion}/${if stdenvNoCC.isDarwin then "mac" else "linux"}/compiler/lib/${lib.optionalString stdenvNoCC.isLinux "intel64_lin"}/*${shlibExt}* $out/lib
-    cp -a opt/intel/oneapi/tbb/${tbbVersion}/lib/${lib.optionalString stdenvNoCC.isLinux "intel64/gcc4.8"}/*${shlibExt}* $out/lib
+    cp -a opt/intel/oneapi/mkl/${mklVersion}/lib/${lib.optionalString stdenvNoCC.hostPlatform.isLinux "intel64"}/*${shlibExt}* $out/lib
+    cp -a opt/intel/oneapi/compiler/${mklVersion}/${if stdenvNoCC.hostPlatform.isDarwin then "mac" else "linux"}/compiler/lib/${lib.optionalString stdenvNoCC.hostPlatform.isLinux "intel64_lin"}/*${shlibExt}* $out/lib
+    cp -a opt/intel/oneapi/tbb/${tbbVersion}/lib/${lib.optionalString stdenvNoCC.hostPlatform.isLinux "intel64/gcc4.8"}/*${shlibExt}* $out/lib
 
     # Headers
     cp -r opt/intel/oneapi/mkl/${mklVersion}/include $out/
@@ -121,10 +121,10 @@ in stdenvNoCC.mkDerivation ({
     cp -r opt/intel/oneapi/mkl/${mklVersion}/lib/cmake $out/lib
   '' +
     (if enableStatic then ''
-      install -Dm0644 -t $out/lib opt/intel/oneapi/mkl/${mklVersion}/lib/${lib.optionalString stdenvNoCC.isLinux "intel64"}/*.a
+      install -Dm0644 -t $out/lib opt/intel/oneapi/mkl/${mklVersion}/lib/${lib.optionalString stdenvNoCC.hostPlatform.isLinux "intel64"}/*.a
       install -Dm0644 -t $out/lib/pkgconfig opt/intel/oneapi/mkl/${mklVersion}/lib/pkgconfig/*.pc
     '' else ''
-      cp opt/intel/oneapi/mkl/${mklVersion}/lib/${lib.optionalString stdenvNoCC.isLinux "intel64"}/*${shlibExt}* $out/lib
+      cp opt/intel/oneapi/mkl/${mklVersion}/lib/${lib.optionalString stdenvNoCC.hostPlatform.isLinux "intel64"}/*${shlibExt}* $out/lib
       install -Dm0644 -t $out/lib/pkgconfig opt/intel/oneapi/mkl/${mklVersion}/lib/pkgconfig/*dynamic*.pc
     '') + ''
     # Setup symlinks for blas / lapack
@@ -142,7 +142,7 @@ in stdenvNoCC.mkDerivation ({
   # fixDarwinDylibName fails for libmkl_cdft_core.dylib because the
   # larger updated load commands do not fit. Use install_name_tool
   # explicitly and ignore the error.
-  postFixup = lib.optionalString stdenvNoCC.isDarwin ''
+  postFixup = lib.optionalString stdenvNoCC.hostPlatform.isDarwin ''
     for f in $out/lib/*.dylib; do
       install_name_tool -id $out/lib/$(basename $f) $f || true
     done
@@ -176,7 +176,7 @@ in stdenvNoCC.mkDerivation ({
     platforms = [ "x86_64-linux" "x86_64-darwin" ];
     maintainers = with maintainers; [ bhipple ];
   };
-} // lib.optionalAttrs stdenvNoCC.isDarwin {
+} // lib.optionalAttrs stdenvNoCC.hostPlatform.isDarwin {
   src = fetchurl {
     url = "https://registrationcenter-download.intel.com/akdlm/IRC_NAS/087a9190-9d96-4b8c-bd2f-79159572ed89/m_onemkl_p_${mklVersion}.${rel}_offline.dmg";
     hash = "sha256-bUaaJPSaLr60fw0DzDCjPvY/UucHlLbCSLyQxyiAi04=";
diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index adeb03d71286..54b4f7cabd92 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -215,7 +215,7 @@ stdenv.mkDerivation rec {
     # This seems to be a bug in the openblas Makefile:
     # on x86_64 it expects NO_BINARY_MODE=
     # but on aarch64 it expects NO_BINARY_MODE=0
-    NO_BINARY_MODE = if stdenv.isx86_64
+    NO_BINARY_MODE = if stdenv.hostPlatform.isx86_64
         then toString (stdenv.hostPlatform != stdenv.buildPlatform)
         else stdenv.hostPlatform != stdenv.buildPlatform;
     # This disables automatic build job count detection (which honours neither enableParallelBuilding nor NIX_BUILD_CORES)
diff --git a/pkgs/development/libraries/science/math/or-tools/default.nix b/pkgs/development/libraries/science/math/or-tools/default.nix
index 43ad807a9d65..a0f599f5d706 100644
--- a/pkgs/development/libraries/science/math/or-tools/default.nix
+++ b/pkgs/development/libraries/science/math/or-tools/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
     "-DUSE_GLPK=ON"
     "-DUSE_SCIP=OFF"
     "-DPython3_EXECUTABLE=${python.pythonOnBuildForHost.interpreter}"
-  ] ++ lib.optionals stdenv.isDarwin [ "-DCMAKE_MACOSX_RPATH=OFF" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-DCMAKE_MACOSX_RPATH=OFF" ];
 
   strictDeps = true;
 
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
     python.pythonOnBuildForHost
     swig
     unzip
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     DarwinTools
   ] ++ (with python.pythonOnBuildForHost.pkgs; [
     pip
diff --git a/pkgs/development/libraries/science/math/p4est-sc/default.nix b/pkgs/development/libraries/science/math/p4est-sc/default.nix
index bb5d212061f2..39b5660494d2 100644
--- a/pkgs/development/libraries/science/math/p4est-sc/default.nix
+++ b/pkgs/development/libraries/science/math/p4est-sc/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation {
 
   # disallow Darwin checks due to prototype incompatibility of qsort_r
   # to be fixed in a future version of the source code
-  doCheck = !stdenv.isDarwin && stdenv.hostPlatform == stdenv.buildPlatform;
+  doCheck = !stdenv.hostPlatform.isDarwin && stdenv.hostPlatform == stdenv.buildPlatform;
 
   meta = {
     branch = "prev3-develop";
diff --git a/pkgs/development/libraries/science/math/scalapack/default.nix b/pkgs/development/libraries/science/math/scalapack/default.nix
index b36f48647819..f7b4ba6738d1 100644
--- a/pkgs/development/libraries/science/math/scalapack/default.nix
+++ b/pkgs/development/libraries/science/math/scalapack/default.nix
@@ -42,11 +42,11 @@ stdenv.mkDerivation rec {
   nativeCheckInputs = [ openssh mpiCheckPhaseHook ];
   buildInputs = [ blas lapack ];
   propagatedBuildInputs = [ mpi ];
-  hardeningDisable = lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [ "stackprotector" ];
+  hardeningDisable = lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin) [ "stackprotector" ];
 
   # xslu and xsllt tests seem to time out on x86_64-darwin.
   # this line is left so those who force installation on x86_64-darwin can still build
-  doCheck = !(stdenv.isx86_64 && stdenv.isDarwin);
+  doCheck = !(stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin);
 
   preConfigure = ''
     cmakeFlagsArray+=(
@@ -81,6 +81,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = with maintainers; [ costrouc markuskowa gdinh ];
     # xslu and xsllt tests fail on x86 darwin
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/development/libraries/science/math/suitesparse-graphblas/default.nix b/pkgs/development/libraries/science/math/suitesparse-graphblas/default.nix
index 2d0b416d975c..f275eed52b07 100644
--- a/pkgs/development/libraries/science/math/suitesparse-graphblas/default.nix
+++ b/pkgs/development/libraries/science/math/suitesparse-graphblas/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     export HOME=$(mktemp -d)
   '';
 
-  cmakeFlags = [ (lib.cmakeBool "GRAPHBLAS_USE_JIT" (!(stdenv.isLinux && stdenv.isAarch64))) ];
+  cmakeFlags = [ (lib.cmakeBool "GRAPHBLAS_USE_JIT" (!(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64))) ];
 
   meta = with lib; {
     description = "Graph algorithms in the language of linear algebra";
diff --git a/pkgs/development/libraries/science/math/suitesparse/4.4.nix b/pkgs/development/libraries/science/math/suitesparse/4.4.nix
index f47b5c0ce818..ef859cfc1ca2 100644
--- a/pkgs/development/libraries/science/math/suitesparse/4.4.nix
+++ b/pkgs/development/libraries/science/math/suitesparse/4.4.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
         -e '/CHOLMOD_CONFIG/ s/$/-DNPARTITION -DLONGBLAS=${int_t}/' \
         -e '/UMFPACK_CONFIG/ s/$/-DLONGBLAS=${int_t}/'
   ''
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i "SuiteSparse_config/SuiteSparse_config.mk" \
         -e 's/^[[:space:]]*\(LIB = -lm\) -lrt/\1/'
   ''
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     "LAPACK=-llapack"
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin " -DNTIMER";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin " -DNTIMER";
 
   postInstall = ''
     # Build and install shared library
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
         for i in "$out"/lib/lib*.a; do
           ar -x $i
         done
-        ${if enableCuda then cudatoolkit else stdenv.cc.outPath}/bin/${if enableCuda then "nvcc" else "cc"} *.o ${if stdenv.isDarwin then "-dynamiclib" else "--shared"} -o "$out/lib/libsuitesparse${SHLIB_EXT}" -lblas ${lib.optionalString enableCuda "-lcublas"}
+        ${if enableCuda then cudatoolkit else stdenv.cc.outPath}/bin/${if enableCuda then "nvcc" else "cc"} *.o ${if stdenv.hostPlatform.isDarwin then "-dynamiclib" else "--shared"} -o "$out/lib/libsuitesparse${SHLIB_EXT}" -lblas ${lib.optionalString enableCuda "-lcublas"}
     )
     for i in umfpack cholmod amd camd colamd spqr; do
       ln -s libsuitesparse${SHLIB_EXT} "$out"/lib/lib$i${SHLIB_EXT}
diff --git a/pkgs/development/libraries/science/math/suitesparse/default.nix b/pkgs/development/libraries/science/math/suitesparse/default.nix
index 43623e8604b9..28909f53fecb 100644
--- a/pkgs/development/libraries/science/math/suitesparse/default.nix
+++ b/pkgs/development/libraries/science/math/suitesparse/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ] ++ lib.optionals enableCuda [
     cudaPackages.cuda_nvcc
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
     "CUDA_PATH=${cudaPackages.cuda_nvcc}"
     "CUDART_LIB=${lib.getLib cudaPackages.cuda_cudart}/lib/libcudart.so"
     "CUBLAS_LIB=${lib.getLib cudaPackages.libcublas}/lib/libcublas.so"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Unless these are set, the build will attempt to use `Accelerate` on darwin, see:
     # https://github.com/DrTimothyAldenDavis/SuiteSparse/blob/v5.13.0/SuiteSparse_config/SuiteSparse_config.mk#L368
     "BLAS=-lblas"
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
   ]
   ;
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Ensure that there is enough space for the `fixDarwinDylibNames` hook to
     # update the install names of the output dylibs.
     NIX_LDFLAGS = "-headerpad_max_install_names";
diff --git a/pkgs/development/libraries/science/math/sympow/default.nix b/pkgs/development/libraries/science/math/sympow/default.nix
index 91714bfd3e70..ea2ed2e83ddd 100644
--- a/pkgs/development/libraries/science/math/sympow/default.nix
+++ b/pkgs/development/libraries/science/math/sympow/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
       "$out/bin/sympow" -curve "[1,-1,0,-79,289]" -analrank | grep ^"Analytic Rank is 4"
       "$out/bin/sympow" -curve "[0,1,1,-2,0]" -analrank | grep ^"Analytic Rank is 2"
     ''
-    + lib.optionalString (!stdenv.isAarch64) ''
+    + lib.optionalString (!stdenv.hostPlatform.isAarch64) ''
       "$out/bin/sympow" -sp 2p16 -curve "[1,2,3,4,5]" | grep '8.3705'
     '';
 
diff --git a/pkgs/development/libraries/science/math/tiny-cuda-nn/default.nix b/pkgs/development/libraries/science/math/tiny-cuda-nn/default.nix
index e149f6bd94e2..ada84ef50767 100644
--- a/pkgs/development/libraries/science/math/tiny-cuda-nn/default.nix
+++ b/pkgs/development/libraries/science/math/tiny-cuda-nn/default.nix
@@ -158,6 +158,6 @@ in
       maintainers = with maintainers; [connorbaker];
       platforms = platforms.linux;
       # g++: error: unrecognized command-line option '-mf16c'
-      broken = stdenv.isAarch64;
+      broken = stdenv.hostPlatform.isAarch64;
     };
   })
diff --git a/pkgs/development/libraries/science/networking/ns-3/default.nix b/pkgs/development/libraries/science/networking/ns-3/default.nix
index 2e2e2a871f7a..efcfa99be0e0 100644
--- a/pkgs/development/libraries/science/networking/ns-3/default.nix
+++ b/pkgs/development/libraries/science/networking/ns-3/default.nix
@@ -137,6 +137,6 @@ stdenv.mkDerivation rec {
     platforms = with platforms; unix;
     maintainers = with maintainers; [ teto rgrunbla ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = (stdenv.isDarwin && stdenv.isAarch64) || (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/libraries/serf/default.nix b/pkgs/development/libraries/serf/default.nix
index 1a2f407f9bc2..07138596d05d 100644
--- a/pkgs/development/libraries/serf/default.nix
+++ b/pkgs/development/libraries/serf/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config scons ];
   buildInputs = [ apr openssl aprutil zlib libiconv ]
-    ++ lib.optional (!stdenv.isCygwin) libkrb5;
+    ++ lib.optional (!stdenv.hostPlatform.isCygwin) libkrb5;
 
   patches = [
     ./scons.patch
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     sconsFlags+=" CC=$CC"
     sconsFlags+=" OPENSSL=${openssl}"
     sconsFlags+=" ZLIB=${zlib}"
-  '' + lib.optionalString (!stdenv.isCygwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isCygwin) ''
     sconsFlags+=" GSSAPI=${libkrb5.dev}"
   '';
 
diff --git a/pkgs/development/libraries/sfml/default.nix b/pkgs/development/libraries/sfml/default.nix
index c3ecd3a9866f..2b28228c5f57 100644
--- a/pkgs/development/libraries/sfml/default.nix
+++ b/pkgs/development/libraries/sfml/default.nix
@@ -45,9 +45,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ freetype libjpeg openal flac libvorbis glew ]
-    ++ lib.optional stdenv.isLinux udev
-    ++ lib.optionals (!stdenv.isDarwin) [ libX11 libXrandr libXrender xcbutilimage ]
-    ++ lib.optionals stdenv.isDarwin [ IOKit Foundation AppKit OpenAL ];
+    ++ lib.optional stdenv.hostPlatform.isLinux udev
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ libX11 libXrandr libXrender xcbutilimage ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit Foundation AppKit OpenAL ];
 
   cmakeFlags = [
     "-DSFML_INSTALL_PKGCONFIG_FILES=yes"
diff --git a/pkgs/development/libraries/shibboleth-sp/default.nix b/pkgs/development/libraries/shibboleth-sp/default.nix
index da63b22f9e7e..f38db198bd30 100644
--- a/pkgs/development/libraries/shibboleth-sp/default.nix
+++ b/pkgs/development/libraries/shibboleth-sp/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ boost fcgi openssl opensaml-cpp log4shib xercesc xml-security-c xml-tooling-c ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       CoreServices
       SystemConfiguration
     ]);
diff --git a/pkgs/development/libraries/silgraphite/graphite2.nix b/pkgs/development/libraries/silgraphite/graphite2.nix
index 7f4b73c79378..d2a4206e7dc1 100644
--- a/pkgs/development/libraries/silgraphite/graphite2.nix
+++ b/pkgs/development/libraries/silgraphite/graphite2.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
         doFakeLibgcc = true;
       });
 
-  patches = lib.optionals stdenv.isDarwin [ ./macosx.patch ];
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [ ./macosx.patch ];
   postPatch = ''
     # disable broken 'nametabletest' test, fails on gcc-13:
     #   https://github.com/silnrsi/graphite/pull/74
diff --git a/pkgs/development/libraries/smpeg/default.nix b/pkgs/development/libraries/smpeg/default.nix
index 099a3d838bbb..d310e3653e7f 100644
--- a/pkgs/development/libraries/smpeg/default.nix
+++ b/pkgs/development/libraries/smpeg/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoconf automake libtool m4 pkg-config makeWrapper ];
 
-  buildInputs = [ SDL ] ++ lib.optionals (!stdenv.isDarwin) [ gtk2 libGLU libGL ];
+  buildInputs = [ SDL ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ gtk2 libGLU libGL ];
 
   outputs = [ "out" "dev" ];
 
diff --git a/pkgs/development/libraries/smpeg2/default.nix b/pkgs/development/libraries/smpeg2/default.nix
index 24dd9c9dc400..bcece08e6195 100644
--- a/pkgs/development/libraries/smpeg2/default.nix
+++ b/pkgs/development/libraries/smpeg2/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoconf automake makeWrapper pkg-config ];
 
   buildInputs = [ SDL2 ]
-    ++ lib.optional stdenv.isDarwin darwin.libobjc;
+    ++ lib.optional stdenv.hostPlatform.isDarwin darwin.libobjc;
 
   outputs = [ "out" "dev" "man" ];
 
diff --git a/pkgs/development/libraries/soci/default.nix b/pkgs/development/libraries/soci/default.nix
index 007a4fbaf7bf..3ba387436e76 100644
--- a/pkgs/development/libraries/soci/default.nix
+++ b/pkgs/development/libraries/soci/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     sqlite
     postgresql
     boost
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Kerberos
   ];
 
diff --git a/pkgs/development/libraries/sofia-sip/default.nix b/pkgs/development/libraries/sofia-sip/default.nix
index b9f34eeb9748..7b33ed04871f 100644
--- a/pkgs/development/libraries/sofia-sip/default.nix
+++ b/pkgs/development/libraries/sofia-sip/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-7QmK2UxEO5lC0KBDWB3bwKTy0Nc7WrdTLjoQYzezoaY=";
   };
 
-  buildInputs = [ glib openssl ] ++ lib.optional stdenv.isDarwin SystemConfiguration;
+  buildInputs = [ glib openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin SystemConfiguration;
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
   meta = with lib; {
diff --git a/pkgs/development/libraries/sonic/default.nix b/pkgs/development/libraries/sonic/default.nix
index 4ab71b36a012..6b82b5f4f04f 100644
--- a/pkgs/development/libraries/sonic/default.nix
+++ b/pkgs/development/libraries/sonic/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   postInstall = ''
     installManPage sonic.1
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libsonic.so.0.3.0 $out/lib/libsonic.so.0.3.0
   '';
 
diff --git a/pkgs/development/libraries/speech-tools/default.nix b/pkgs/development/libraries/speech-tools/default.nix
index 8bee16fef753..1dbaa016cbbf 100644
--- a/pkgs/development/libraries/speech-tools/default.nix
+++ b/pkgs/development/libraries/speech-tools/default.nix
@@ -28,9 +28,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     ncurses
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     AudioUnit
     Cocoa
diff --git a/pkgs/development/libraries/speexdsp/default.nix b/pkgs/development/libraries/speexdsp/default.nix
index 0f5e09cf83e5..e3452beab870 100644
--- a/pkgs/development/libraries/speexdsp/default.nix
+++ b/pkgs/development/libraries/speexdsp/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   buildInputs = lib.optionals withFftw3 [ fftw ];
 
   configureFlags = lib.optionals withFftw3 [ "--with-fft=gpl-fftw3" ]
-    ++ lib.optional stdenv.isAarch64 "--disable-neon";
+    ++ lib.optional stdenv.hostPlatform.isAarch64 "--disable-neon";
 
   meta = with lib; {
     homepage = "https://www.speex.org/";
diff --git a/pkgs/development/libraries/spglib/default.nix b/pkgs/development/libraries/spglib/default.nix
index 1d3f8b489f21..75634072b8ec 100644
--- a/pkgs/development/libraries/spglib/default.nix
+++ b/pkgs/development/libraries/spglib/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake gfortran gtest ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ openmp ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ openmp ];
 
   cmakeFlags = [ "-DSPGLIB_WITH_Fortran=On" ];
 
diff --git a/pkgs/development/libraries/spice-gtk/default.nix b/pkgs/development/libraries/spice-gtk/default.nix
index fd7428213fc9..048ba14f5f93 100644
--- a/pkgs/development/libraries/spice-gtk/default.nix
+++ b/pkgs/development/libraries/spice-gtk/default.nix
@@ -37,7 +37,7 @@
 , wayland-scanner
 , zlib
 , wrapGAppsHook3
-, withPolkit ? stdenv.isLinux
+, withPolkit ? stdenv.hostPlatform.isLinux
 }:
 
 # If this package is built with polkit support (withPolkit=true),
@@ -92,7 +92,7 @@ stdenv.mkDerivation rec {
     wrapGAppsHook3
   ] ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
     mesonEmulatorHook
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wayland-scanner
   ];
 
@@ -119,7 +119,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals withPolkit [
     polkit
     acl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap_ng
     libdrm
     wayland-protocols
@@ -132,7 +132,7 @@ stdenv.mkDerivation rec {
     "-Dusb-ids-path=${hwdata}/share/hwdata/usb.ids"
   ] ++ lib.optionals (!withPolkit) [
     "-Dpolkit=disabled"
-  ] ++ lib.optionals (!stdenv.isLinux) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Dlibcap-ng=disabled"
     "-Degl=disabled"
   ] ++ lib.optionals stdenv.hostPlatform.isMusl [
diff --git a/pkgs/development/libraries/spice/default.nix b/pkgs/development/libraries/spice/default.nix
index d7855cd5cea5..4ac1b1cdee11 100644
--- a/pkgs/development/libraries/spice/default.nix
+++ b/pkgs/development/libraries/spice/default.nix
@@ -67,9 +67,9 @@ stdenv.mkDerivation rec {
     python3.pkgs.pyparsing
     spice-protocol
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     gdk-pixbuf
   ];
 
diff --git a/pkgs/development/libraries/sqlite/default.nix b/pkgs/development/libraries/sqlite/default.nix
index dd4e15ea566f..ed1499abe697 100644
--- a/pkgs/development/libraries/sqlite/default.nix
+++ b/pkgs/development/libraries/sqlite/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   };
 
   outputs = [ "bin" "dev" "out" ];
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   nativeBuildInputs = [ updateAutotoolsGnuConfigScriptsHook ];
   buildInputs = [ zlib ] ++ lib.optionals interactive [ readline ncurses ];
diff --git a/pkgs/development/libraries/sqlite/tools.nix b/pkgs/development/libraries/sqlite/tools.nix
index 2b843c0b22e0..1c8ab1f3465a 100644
--- a/pkgs/development/libraries/sqlite/tools.nix
+++ b/pkgs/development/libraries/sqlite/tools.nix
@@ -13,7 +13,7 @@ let
     };
 
     nativeBuildInputs = [ unzip ];
-    buildInputs = [ tcl ] ++ lib.optional stdenv.isDarwin Foundation;
+    buildInputs = [ tcl ] ++ lib.optional stdenv.hostPlatform.isDarwin Foundation;
 
     makeFlags = [ makeTarget ];
 
diff --git a/pkgs/development/libraries/stargate-libcds/default.nix b/pkgs/development/libraries/stargate-libcds/default.nix
index b74f19e1959a..c37365652e72 100644
--- a/pkgs/development/libraries/stargate-libcds/default.nix
+++ b/pkgs/development/libraries/stargate-libcds/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   };
 
   # Fix 'error: unrecognized command line option' in platforms other than x86
-  PLAT_FLAGS = lib.optionalString stdenv.isx86_64 "-mfpmath=sse -mssse3";
+  PLAT_FLAGS = lib.optionalString stdenv.hostPlatform.isx86_64 "-mfpmath=sse -mssse3";
 
   patches = [
     # Remove unnecessary tests (valgrind, coverage)
diff --git a/pkgs/development/libraries/stfl/default.nix b/pkgs/development/libraries/stfl/default.nix
index b79020e3ba71..91a41ac35298 100644
--- a/pkgs/development/libraries/stfl/default.nix
+++ b/pkgs/development/libraries/stfl/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   preBuild = ''
     sed -i s/gcc/cc/g Makefile
     sed -i s%ncursesw/ncurses.h%ncurses.h% stfl_internals.h
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i s/-soname/-install_name/ Makefile
   ''
   # upstream builds shared library unconditionally. Also, it has no
diff --git a/pkgs/development/libraries/stxxl/default.nix b/pkgs/development/libraries/stxxl/default.nix
index 5d58212d70c6..31d9098242c2 100644
--- a/pkgs/development/libraries/stxxl/default.nix
+++ b/pkgs/development/libraries/stxxl/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , fetchFromGitHub
 , cmake
-, parallelSupport ? (!stdenv.isDarwin)
+, parallelSupport ? (!stdenv.hostPlatform.isDarwin)
 }:
 
 let
diff --git a/pkgs/development/libraries/symengine/default.nix b/pkgs/development/libraries/symengine/default.nix
index 25043bbb0265..cbdb542dbfd9 100644
--- a/pkgs/development/libraries/symengine/default.nix
+++ b/pkgs/development/libraries/symengine/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     "-DWITH_SYMENGINE_THREAD_SAFE=yes"
     "-DWITH_MPC=yes"
     "-DBUILD_FOR_DISTRIBUTION=yes"
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     # error: unrecognized instruction mnemonic, did you mean: bit, cnt, hint, ins, not?
     "-DBUILD_TESTS=OFF"
   ] ++ lib.optionals withShared [
diff --git a/pkgs/development/libraries/t1lib/default.nix b/pkgs/development/libraries/t1lib/default.nix
index 16112f32b1e2..e09ed7ee32dc 100644
--- a/pkgs/development/libraries/t1lib/default.nix
+++ b/pkgs/development/libraries/t1lib/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libX11 libXaw ];
   buildFlags = [ "without_doc" ];
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # ??
     chmod +x $out/lib/*.so.*
   '';
diff --git a/pkgs/development/libraries/tachyon/default.nix b/pkgs/development/libraries/tachyon/default.nix
index 0446d2cac6e7..9520f9a8404e 100644
--- a/pkgs/development/libraries/tachyon/default.nix
+++ b/pkgs/development/libraries/tachyon/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
     url = "http://jedi.ks.uiuc.edu/~johns/tachyon/files/${version}/${pname}-${version}.tar.gz";
     sha256 = "sha256-CSA8ECMRFJ9d9cw2dAn5bHJXQmZtGcJNtbqZTVqBpvU=";
   };
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
   ] ++ lib.optionals withJpegSupport [
     libjpeg
diff --git a/pkgs/development/libraries/taco/default.nix b/pkgs/development/libraries/taco/default.nix
index 693b5f25f990..a2f2f933214c 100644
--- a/pkgs/development/libraries/taco/default.nix
+++ b/pkgs/development/libraries/taco/default.nix
@@ -25,7 +25,7 @@ in stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = lib.optional stdenv.isDarwin llvmPackages.openmp;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin llvmPackages.openmp;
 
   propagatedBuildInputs = lib.optional enablePython pyEnv;
 
diff --git a/pkgs/development/libraries/talloc/default.nix b/pkgs/development/libraries/talloc/default.nix
index 793fc1ccf5cb..eb1525fb9acb 100644
--- a/pkgs/development/libraries/talloc/default.nix
+++ b/pkgs/development/libraries/talloc/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     wafHook
     docbook-xsl-nons
     docbook_xml_dtd_42
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
diff --git a/pkgs/development/libraries/tbb/2020_3.nix b/pkgs/development/libraries/tbb/2020_3.nix
index dcd21b27ff33..c7e1e9127630 100644
--- a/pkgs/development/libraries/tbb/2020_3.nix
+++ b/pkgs/development/libraries/tbb/2020_3.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  nativeBuildInputs = (lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = (lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ]);
 
diff --git a/pkgs/development/libraries/tbb/2021_5.nix b/pkgs/development/libraries/tbb/2021_5.nix
index 3bfa9278106d..90e7aa2a9f2f 100644
--- a/pkgs/development/libraries/tbb/2021_5.nix
+++ b/pkgs/development/libraries/tbb/2021_5.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     lib.optionals stdenv.cc.isClang [ "-Wno-error=unused-but-set-variable" ] ++
     # Workaround for gcc-12 ICE when using -O3
     # https://gcc.gnu.org/PR108854
-    lib.optionals (stdenv.cc.isGNU && stdenv.isx86_32) [ "-O2" ];
+    lib.optionals (stdenv.cc.isGNU && stdenv.hostPlatform.isx86_32) [ "-O2" ];
 
   # Fix undefined reference errors with version script under LLVM.
   NIX_LDFLAGS = lib.optionalString (stdenv.cc.bintools.isLLVM && lib.versionAtLeast stdenv.cc.bintools.version "17") "--undefined-version";
diff --git a/pkgs/development/libraries/tbb/default.nix b/pkgs/development/libraries/tbb/default.nix
index 73ea56b30686..3ff04d6bf1ab 100644
--- a/pkgs/development/libraries/tbb/default.nix
+++ b/pkgs/development/libraries/tbb/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     lib.optionals stdenv.cc.isClang [ "-Wno-error=unused-but-set-variable" ] ++
     # Workaround for gcc-12 ICE when using -O3
     # https://gcc.gnu.org/PR108854
-    lib.optionals (stdenv.cc.isGNU && stdenv.isx86_32) [ "-O2" ];
+    lib.optionals (stdenv.cc.isGNU && stdenv.hostPlatform.isx86_32) [ "-O2" ];
 
   # Fix undefined reference errors with version script under LLVM.
   NIX_LDFLAGS = lib.optionalString (stdenv.cc.bintools.isLLVM && lib.versionAtLeast stdenv.cc.bintools.version "17") "--undefined-version";
diff --git a/pkgs/development/libraries/tdb/default.nix b/pkgs/development/libraries/tdb/default.nix
index d78f4abafab0..c84ded6267e1 100644
--- a/pkgs/development/libraries/tdb/default.nix
+++ b/pkgs/development/libraries/tdb/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     "--cross-execute=${stdenv.hostPlatform.emulator buildPackages}"
   ];
 
-  postFixup = if stdenv.isDarwin
+  postFixup = if stdenv.hostPlatform.isDarwin
     then ''install_name_tool -id $out/lib/libtdb.dylib $out/lib/libtdb.dylib''
     else null;
 
diff --git a/pkgs/development/libraries/tdlib/default.nix b/pkgs/development/libraries/tdlib/default.nix
index d02bd3b81011..f9a87aa73b51 100644
--- a/pkgs/development/libraries/tdlib/default.nix
+++ b/pkgs/development/libraries/tdlib/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
                  function(generate_pkgconfig' \
       --replace '\$'{prefix}/'$'{CMAKE_INSTALL_LIBDIR} '$'{CMAKE_INSTALL_FULL_LIBDIR} \
       --replace '\$'{prefix}/'$'{CMAKE_INSTALL_INCLUDEDIR} '$'{CMAKE_INSTALL_FULL_INCLUDEDIR}
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     sed -i "/vptr/d" test/CMakeLists.txt
   '';
 
diff --git a/pkgs/development/libraries/tezos-rust-libs/default.nix b/pkgs/development/libraries/tezos-rust-libs/default.nix
index 85470f606f28..85ac4b0266c5 100644
--- a/pkgs/development/libraries/tezos-rust-libs/default.nix
+++ b/pkgs/development/libraries/tezos-rust-libs/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ llvmPackages_12.llvm cargo ];
   propagatedBuildDeps = [ llvmPackages_12.libllvm ];
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   buildPhase = ''
     runHook preBuild
diff --git a/pkgs/development/libraries/thrift/default.nix b/pkgs/development/libraries/thrift/default.nix
index 7995a3fe1699..589f03c68858 100644
--- a/pkgs/development/libraries/thrift/default.nix
+++ b/pkgs/development/libraries/thrift/default.nix
@@ -103,7 +103,7 @@ stdenv.mkDerivation rec {
   disabledTests = [
     "PythonTestSSLSocket"
     "PythonThriftTNonblockingServer"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Tests that hang up in the Darwin sandbox
     "SecurityTest"
     "SecurityFromBufferTest"
@@ -129,7 +129,7 @@ stdenv.mkDerivation rec {
   checkPhase = ''
     runHook preCheck
 
-    ${lib.optionalString stdenv.isDarwin "DY"}LD_LIBRARY_PATH=$PWD/lib ctest -E "($(echo "$disabledTests" | tr " " "|"))"
+    ${lib.optionalString stdenv.hostPlatform.isDarwin "DY"}LD_LIBRARY_PATH=$PWD/lib ctest -E "($(echo "$disabledTests" | tr " " "|"))"
 
     runHook postCheck
   '';
diff --git a/pkgs/development/libraries/tiledb/default.nix b/pkgs/development/libraries/tiledb/default.nix
index 28b14d3a8a5b..9b834c3a7e58 100644
--- a/pkgs/development/libraries/tiledb/default.nix
+++ b/pkgs/development/libraries/tiledb/default.nix
@@ -108,7 +108,7 @@ stdenv.mkDerivation rec {
 
   installTargets = [ "install-tiledb" "doc" ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath ${tbb}/lib $out/lib/libtiledb.dylib
   '';
 
diff --git a/pkgs/development/libraries/tinyxml/2.6.2.nix b/pkgs/development/libraries/tinyxml/2.6.2.nix
index ded5013cca99..456fd7fe2dd9 100644
--- a/pkgs/development/libraries/tinyxml/2.6.2.nix
+++ b/pkgs/development/libraries/tinyxml/2.6.2.nix
@@ -39,7 +39,7 @@ in stdenv.mkDerivation {
   hardeningDisable = [ "format" ];
 
   env.NIX_CFLAGS_COMPILE =
-    lib.optionalString stdenv.isDarwin "-mmacosx-version-min=10.9";
+    lib.optionalString stdenv.hostPlatform.isDarwin "-mmacosx-version-min=10.9";
 
   nativeBuildInputs = [ unzip ];
   buildPhase = ''
@@ -78,7 +78,7 @@ in stdenv.mkDerivation {
     cp -v tinyxml.pc $out/lib/pkgconfig/
 
     cp -v docs/* $out/share/doc/tinyxml/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id $out/lib/libtinyxml.dylib $out/lib/libtinyxml.dylib
   '';
 
diff --git a/pkgs/development/libraries/tk/8.5.nix b/pkgs/development/libraries/tk/8.5.nix
index afd575915f85..ad0013060ff6 100644
--- a/pkgs/development/libraries/tk/8.5.nix
+++ b/pkgs/development/libraries/tk/8.5.nix
@@ -14,7 +14,7 @@ callPackage ./generic.nix (args // {
     sha256 = "1yhgcalldrjlc5q614rlzg1crgd3b52dhrk1pncdaxvl2vgg2yj0";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     # Define MODULE_SCOPE before including tkPort.h
     # https://core.tcl-lang.org/tk/info/dba9f5ce3b
     (fetchpatch {
diff --git a/pkgs/development/libraries/tk/generic.nix b/pkgs/development/libraries/tk/generic.nix
index 4978f8b96f58..232ae01abbfd 100644
--- a/pkgs/development/libraries/tk/generic.nix
+++ b/pkgs/development/libraries/tk/generic.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, src, pkg-config, tcl, libXft, patches ? []
-, enableAqua ? stdenv.isDarwin, darwin
+, enableAqua ? stdenv.hostPlatform.isDarwin, darwin
 , ... }:
 
 tcl.mkTclDerivation {
@@ -22,7 +22,7 @@ tcl.mkTclDerivation {
       substituteInPlace $file --replace "exec wish" "exec $out/bin/wish"
     done
   ''
-  + lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") ''
+  + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "11") ''
     substituteInPlace unix/configure* \
       --replace " -framework UniformTypeIdentifiers" ""
   '';
@@ -32,13 +32,13 @@ tcl.mkTclDerivation {
     cp ../{unix,generic}/*.h $out/include
     ln -s $out/lib/libtk${tcl.release}${stdenv.hostPlatform.extensions.sharedLibrary} $out/lib/libtk${stdenv.hostPlatform.extensions.sharedLibrary}
   ''
-  + lib.optionalString (stdenv.isDarwin) ''
+  + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     cp ../macosx/*.h $out/include
   '';
 
   configureFlags = [
     "--enable-threads"
-  ] ++ lib.optional stdenv.is64bit "--enable-64bit"
+  ] ++ lib.optional stdenv.hostPlatform.is64bit "--enable-64bit"
     ++ lib.optional enableAqua "--enable-aqua";
 
   nativeBuildInputs = [ pkg-config ];
diff --git a/pkgs/development/libraries/tkimg/default.nix b/pkgs/development/libraries/tkimg/default.nix
index 8b66e195d5a5..f058585d3ad9 100644
--- a/pkgs/development/libraries/tkimg/default.nix
+++ b/pkgs/development/libraries/tkimg/default.nix
@@ -16,7 +16,7 @@ tcl.mkTclDerivation rec {
     "--with-tkinclude=${tk.dev}/include"
   ];
 
-  buildInputs = [ xorg.libX11 tcllib ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = [ xorg.libX11 tcllib ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Cocoa
   ]);
 
diff --git a/pkgs/development/libraries/toml-f/default.nix b/pkgs/development/libraries/toml-f/default.nix
index 3f95d5682f9e..30632e1160db 100644
--- a/pkgs/development/libraries/toml-f/default.nix
+++ b/pkgs/development/libraries/toml-f/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ];
 
   # tftest-build fails on aarch64-linux
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   meta = with lib; {
     description = "TOML parser implementation for data serialization and deserialization in Fortran";
diff --git a/pkgs/development/libraries/tpm2-tss/default.nix b/pkgs/development/libraries/tpm2-tss/default.nix
index 6d3a29c28ba7..34b37d1c74a1 100644
--- a/pkgs/development/libraries/tpm2-tss/default.nix
+++ b/pkgs/development/libraries/tpm2-tss/default.nix
@@ -10,7 +10,7 @@ let
   # needs to be conditional based on isLinux because procps for other systems
   # might not support the withSystemd option.
   procpsWithoutSystemd = procps.override { withSystemd = false; };
-  procps_pkg = if stdenv.isLinux then procpsWithoutSystemd else procps;
+  procps_pkg = if stdenv.hostPlatform.isLinux then procpsWithoutSystemd else procps;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/development/libraries/tracker/default.nix b/pkgs/development/libraries/tracker/default.nix
index da5274e0b7df..d75bbdd542fe 100644
--- a/pkgs/development/libraries/tracker/default.nix
+++ b/pkgs/development/libraries/tracker/default.nix
@@ -79,7 +79,7 @@ stdenv.mkDerivation (finalAttrs: {
     avahi
     libstemmer
     dbus
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     systemd
   ];
 
@@ -103,15 +103,15 @@ stdenv.mkDerivation (finalAttrs: {
     [
       "--cross-file=${crossFile}"
     ]
-  ) ++ lib.optionals (!stdenv.isLinux) [
+  ) ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
     "-Dsystemd_user_services=false"
   ];
 
   doCheck =
     # https://gitlab.gnome.org/GNOME/tracker/-/issues/402
-    !stdenv.isDarwin
+    !stdenv.hostPlatform.isDarwin
     # https://gitlab.gnome.org/GNOME/tracker/-/issues/398
-    && !stdenv.is32bit;
+    && !stdenv.hostPlatform.is32bit;
 
   postPatch = ''
     chmod +x \
@@ -125,8 +125,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   preCheck =
     let
-      linuxDot0 = lib.optionalString stdenv.isLinux ".0";
-      darwinDot0 = lib.optionalString stdenv.isDarwin ".0";
+      linuxDot0 = lib.optionalString stdenv.hostPlatform.isLinux ".0";
+      darwinDot0 = lib.optionalString stdenv.hostPlatform.isDarwin ".0";
       extension = stdenv.hostPlatform.extensions.sharedLibrary;
     in
     ''
diff --git a/pkgs/development/libraries/ubus/default.nix b/pkgs/development/libraries/ubus/default.nix
index 662ec1c7b035..dede0e55657a 100644
--- a/pkgs/development/libraries/ubus/default.nix
+++ b/pkgs/development/libraries/ubus/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation {
   buildInputs = [ libubox libjson ];
   nativeBuildInputs = [ cmake ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     "-Wno-error=gnu-folding-constant"
   ]);
 
diff --git a/pkgs/development/libraries/uclient/default.nix b/pkgs/development/libraries/uclient/default.nix
index 7206b6ad98fc..f758c00810ed 100644
--- a/pkgs/development/libraries/uclient/default.nix
+++ b/pkgs/development/libraries/uclient/default.nix
@@ -26,6 +26,6 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ mkg20001 ];
     mainProgram = "uclient-fetch";
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/libraries/udns/default.nix b/pkgs/development/libraries/udns/default.nix
index f9c5a80582b7..5dad256063b4 100644
--- a/pkgs/development/libraries/udns/default.nix
+++ b/pkgs/development/libraries/udns/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   # udns uses a very custom build and hardcodes a .so name in a few places.
   # Instead of fighting with it to apply the standard dylib script, change
   # the right place in the Makefile itself.
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile.in \
       --replace --soname, -install_name,$out/lib/
   '';
diff --git a/pkgs/development/libraries/unicorn/default.nix b/pkgs/development/libraries/unicorn/default.nix
index b6a91a7367a4..6b160a852d6c 100644
--- a/pkgs/development/libraries/unicorn/default.nix
+++ b/pkgs/development/libraries/unicorn/default.nix
@@ -21,18 +21,18 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     IOKit
   ];
 
   # Ensure the linker is using atomic when compiling for RISC-V, otherwise fails
   NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isRiscV "-latomic";
 
-  cmakeFlags = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  cmakeFlags = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     # Some x86 tests are interrupted by signal 10
     "-DCMAKE_CTEST_ARGUMENTS=--exclude-regex;test_x86"
   ];
diff --git a/pkgs/development/libraries/unixODBCDrivers/default.nix b/pkgs/development/libraries/unixODBCDrivers/default.nix
index fe181d37f6bf..bd27a36d663a 100644
--- a/pkgs/development/libraries/unixODBCDrivers/default.nix
+++ b/pkgs/development/libraries/unixODBCDrivers/default.nix
@@ -39,7 +39,7 @@
 
     nativeBuildInputs = [ cmake ];
     buildInputs = [ unixODBC openssl libiconv zlib ]
-      ++ lib.optionals stdenv.isDarwin [ libkrb5 ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ libkrb5 ];
 
     cmakeFlags = [
       "-DWITH_EXTERNAL_ZLIB=ON"
@@ -50,9 +50,9 @@
       "-DWITH_IODBC=OFF"
     ];
 
-    buildFlags = if stdenv.isDarwin then [ "maodbc" ] else null;
+    buildFlags = if stdenv.hostPlatform.isDarwin then [ "maodbc" ] else null;
 
-    installTargets = if stdenv.isDarwin then [ "install/fast" ] else null;
+    installTargets = if stdenv.hostPlatform.isDarwin then [ "install/fast" ] else null;
 
     # see the top of the file for an explanation
     passthru = {
@@ -170,7 +170,7 @@
     };
 
     meta = with lib; {
-      broken = stdenv.isDarwin;
+      broken = stdenv.hostPlatform.isDarwin;
       description = "ODBC Driver ${versionMajor} for SQL Server";
       homepage = "https://docs.microsoft.com/en-us/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server?view=sql-server-2017";
       sourceProvenance = with sourceTypes; [ binaryNativeCode ];
@@ -187,7 +187,7 @@
     versionMajor = "18";
     versionMinor = "1";
     versionAdditional = "1.1";
-    versionSuffix = lib.optionalString stdenv.isLinux "-1";
+    versionSuffix = lib.optionalString stdenv.hostPlatform.isLinux "-1";
 
     src = fetchurl {
       url = {
@@ -205,7 +205,7 @@
     };
 
     nativeBuildInputs =
-      if stdenv.isDarwin
+      if stdenv.hostPlatform.isDarwin
       then
         [
           # Fix up the names encoded into the dylib, and make them absolute.
@@ -217,12 +217,12 @@
           patchelf
         ];
 
-    unpackPhase = lib.optionalString stdenv.isLinux ''
+    unpackPhase = lib.optionalString stdenv.hostPlatform.isLinux ''
       dpkg -x $src ./
     '';
 
     installPhase =
-      if stdenv.isDarwin
+      if stdenv.hostPlatform.isDarwin
       then
         ''
           mkdir -p $out
@@ -236,14 +236,14 @@
         '';
 
     # Replace the hard-coded paths in the dylib with nixpkgs equivalents.
-    fixupPhase = lib.optionalString stdenv.isDarwin ''
+    fixupPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
       ${stdenv.cc.bintools.targetPrefix}install_name_tool \
         -change /usr/lib/libiconv.2.dylib ${libiconv}/lib/libiconv.2.dylib \
         -change /opt/homebrew/lib/libodbcinst.2.dylib ${unixODBC}/lib/libodbcinst.2.dylib \
         $out/${finalAttrs.passthru.driver}
     '';
 
-    postFixup = lib.optionalString stdenv.isLinux ''
+    postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
       patchelf --set-rpath ${lib.makeLibraryPath [ unixODBC openssl libkrb5 libuuid stdenv.cc.cc ]} \
         $out/${finalAttrs.passthru.driver}
     '';
@@ -251,7 +251,7 @@
     # see the top of the file for an explanation
     passthru = {
       fancyName = "ODBC Driver ${finalAttrs.versionMajor} for SQL Server";
-      driver = "lib/libmsodbcsql${if stdenv.isDarwin then ".${finalAttrs.versionMajor}.dylib" else "-${finalAttrs.versionMajor}.${finalAttrs.versionMinor}.so.${finalAttrs.versionAdditional}"}";
+      driver = "lib/libmsodbcsql${if stdenv.hostPlatform.isDarwin then ".${finalAttrs.versionMajor}.dylib" else "-${finalAttrs.versionMajor}.${finalAttrs.versionMinor}.so.${finalAttrs.versionAdditional}"}";
     };
 
     meta = with lib; {
@@ -300,7 +300,7 @@
     };
 
     meta = with lib; {
-      broken = stdenv.isDarwin;
+      broken = stdenv.hostPlatform.isDarwin;
       description = "Amazon Redshift ODBC driver";
       homepage = "https://docs.aws.amazon.com/redshift/latest/mgmt/configure-odbc-connection.html";
       sourceProvenance = with sourceTypes; [ binaryNativeCode ];
diff --git a/pkgs/development/libraries/v8/default.nix b/pkgs/development/libraries/v8/default.nix
index 3ea2d075602a..b6b2d4e6298f 100644
--- a/pkgs/development/libraries/v8/default.nix
+++ b/pkgs/development/libraries/v8/default.nix
@@ -101,11 +101,11 @@ stdenv.mkDerivation rec {
   '';
 
   postPatch = ''
-    ${lib.optionalString stdenv.isAarch64 ''
+    ${lib.optionalString stdenv.hostPlatform.isAarch64 ''
       substituteInPlace build/toolchain/linux/BUILD.gn \
         --replace 'toolprefix = "aarch64-linux-gnu-"' 'toolprefix = ""'
     ''}
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace build/config/compiler/compiler.gni \
         --replace 'strip_absolute_paths_from_debug_symbols = true' \
                   'strip_absolute_paths_from_debug_symbols = false'
@@ -113,7 +113,7 @@ stdenv.mkDerivation rec {
         --replace 'current_toolchain == host_toolchain || !use_xcode_clang' \
                   'false'
     ''}
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace build/config/compiler/BUILD.gn \
         --replace "-Wl,-fatal_warnings" ""
     ''}
@@ -141,7 +141,7 @@ stdenv.mkDerivation rec {
     ''host_toolchain="//build/toolchain/linux/unbundle:default"''
     ''v8_snapshot_toolchain="//build/toolchain/linux/unbundle:default"''
   ] ++ lib.optional stdenv.cc.isClang ''clang_base_path="${llvmCcAndBintools}"''
-  ++ lib.optional stdenv.isDarwin ''use_lld=false'';
+  ++ lib.optional stdenv.hostPlatform.isDarwin ''use_lld=false'';
 
   env.NIX_CFLAGS_COMPILE = toString ([
     "-O2"
@@ -155,7 +155,7 @@ stdenv.mkDerivation rec {
     ninja
     pkg-config
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     xcbuild
     llvmPackages.llvm
     python3.pkgs.setuptools
diff --git a/pkgs/development/libraries/vc/0.7.nix b/pkgs/development/libraries/vc/0.7.nix
index 50eaddda890e..fa0e6feb7df7 100644
--- a/pkgs/development/libraries/vc/0.7.nix
+++ b/pkgs/development/libraries/vc/0.7.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     maintainers = with maintainers; [ abbradar ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = (stdenv.isDarwin && stdenv.isAarch64) || (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/libraries/vcdimager/default.nix b/pkgs/development/libraries/vcdimager/default.nix
index 5c3140a177c3..02f959cf74ed 100644
--- a/pkgs/development/libraries/vcdimager/default.nix
+++ b/pkgs/development/libraries/vcdimager/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ libxml2 popt libiconv ]
-             ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ IOKit DiskArbitration ]);
+             ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ IOKit DiskArbitration ]);
 
   propagatedBuildInputs = [ libcdio ];
 
diff --git a/pkgs/development/libraries/vectorscan/default.nix b/pkgs/development/libraries/vectorscan/default.nix
index 835db0f3566b..8525a66e4092 100644
--- a/pkgs/development/libraries/vectorscan/default.nix
+++ b/pkgs/development/libraries/vectorscan/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     pkg-config
     ragel
     python3
-  ] ++ lib.optional stdenv.isLinux util-linux;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux util-linux;
 
   buildInputs = [
     boost184
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     (if lib.elem stdenv.hostPlatform.system [ "x86_64-linux" "i686-linux" ] then
       [ "-DBUILD_AVX2=ON" "-DBUILD_AVX512=ON" "-DBUILD_AVX512VBMI=ON" "-DFAT_RUNTIME=ON" ]
     else
-      (if (stdenv.isLinux && stdenv.isAarch64) then
+      (if (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) then
         [ "-DBUILD_SVE=ON" "-DBUILD_SVE2=ON" "-DBUILD_SVE2_BITPERM=ON" "-DFAT_RUNTIME=ON" ]
       else
         [ "-DFAT_RUNTIME=OFF" ]
diff --git a/pkgs/development/libraries/virtualpg/default.nix b/pkgs/development/libraries/virtualpg/default.nix
index d9778decd129..e15961437002 100644
--- a/pkgs/development/libraries/virtualpg/default.nix
+++ b/pkgs/development/libraries/virtualpg/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ postgresql sqlite ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Kerberos ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Kerberos ];
 
   meta = with lib; {
     description = "Loadable dynamic extension to both SQLite and SpatiaLite";
diff --git a/pkgs/development/libraries/vmmlib/default.nix b/pkgs/development/libraries/vmmlib/default.nix
index 11df1a495f02..d2840ba33a63 100644
--- a/pkgs/development/libraries/vmmlib/default.nix
+++ b/pkgs/development/libraries/vmmlib/default.nix
@@ -19,14 +19,14 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config cmake ];
   buildInputs = [ boost lapack ]
-    ++ lib.optionals stdenv.isDarwin [ Accelerate CoreGraphics CoreVideo ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Accelerate CoreGraphics CoreVideo ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkTarget = "test";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Vector and matrix math library implemented using C++ templates";
 
     longDescription = ''vmmlib is a vector and matrix math library implemented
diff --git a/pkgs/development/libraries/vrpn/default.nix b/pkgs/development/libraries/vrpn/default.nix
index e233269fafd1..3272a4bbd147 100644
--- a/pkgs/development/libraries/vrpn/default.nix
+++ b/pkgs/development/libraries/vrpn/default.nix
@@ -24,12 +24,12 @@ stdenv.mkDerivation rec {
     unzip
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.GLUT
     darwin.apple_sdk.frameworks.IOKit
     darwin.apple_sdk.frameworks.OpenGL
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libGLU
     libGL
   ];
diff --git a/pkgs/development/libraries/vsqlite/default.nix b/pkgs/development/libraries/vsqlite/default.nix
index 6981de6aa074..029e4c617f46 100644
--- a/pkgs/development/libraries/vsqlite/default.nix
+++ b/pkgs/development/libraries/vsqlite/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ boost sqlite ];
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile.in \
         --replace '-Wl,--as-needed' "" \
         --replace '-Wl,-soname -Wl,libvsqlitepp.so.3' \
diff --git a/pkgs/development/libraries/vte/default.nix b/pkgs/development/libraries/vte/default.nix
index 87cf27f70fd4..479758ed6dee 100644
--- a/pkgs/development/libraries/vte/default.nix
+++ b/pkgs/development/libraries/vte/default.nix
@@ -92,7 +92,7 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.mesonBool "gtk4" (gtkVersion == "4"))
   ] ++ lib.optionals (!systemdSupport) [
     "-D_systemd=false"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # -Bsymbolic-functions is not supported on darwin
     "-D_b_symbolic_functions=false"
   ];
diff --git a/pkgs/development/libraries/vtk/generic.nix b/pkgs/development/libraries/vtk/generic.nix
index d131fe173ab8..3f7f05678f15 100644
--- a/pkgs/development/libraries/vtk/generic.nix
+++ b/pkgs/development/libraries/vtk/generic.nix
@@ -30,11 +30,11 @@ in stdenv.mkDerivation {
 
   buildInputs = [ libpng libtiff ]
     ++ optionals enableQt [ (qtEnv "qvtk-qt-env" [ qtx11extras qttools qtdeclarative ]) ]
-    ++ optionals stdenv.isLinux [
+    ++ optionals stdenv.hostPlatform.isLinux [
       libGLU
       xorgproto
       libXt
-    ] ++ optionals stdenv.isDarwin [
+    ] ++ optionals stdenv.hostPlatform.isDarwin [
       xpc
       AGL
       Cocoa
@@ -52,8 +52,8 @@ in stdenv.mkDerivation {
     ] ++ optionals enablePython [
       python
     ];
-  propagatedBuildInputs = optionals stdenv.isDarwin [ libobjc ]
-    ++ optionals stdenv.isLinux [ libX11 libGL ];
+  propagatedBuildInputs = optionals stdenv.hostPlatform.isDarwin [ libobjc ]
+    ++ optionals stdenv.hostPlatform.isLinux [ libX11 libGL ];
     # see https://github.com/NixOS/nixpkgs/pull/178367#issuecomment-1238827254
 
   patches = map fetchpatch patchesToFetch;
@@ -64,7 +64,7 @@ in stdenv.mkDerivation {
       -i ThirdParty/libproj/vtklibproj/src/proj_json_streaming_writer.hpp \
       -i IO/Image/vtkSEPReader.h
   ''
-  + optionalString stdenv.isDarwin ''
+  + optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's|COMMAND vtkHashSource|COMMAND "DYLD_LIBRARY_PATH=''${VTK_BINARY_DIR}/lib" ''${VTK_BINARY_DIR}/bin/vtkHashSource-${majorVersion}|' ./Parallel/Core/CMakeLists.txt
     sed -i 's/fprintf(output, shift)/fprintf(output, "%s", shift)/' ./ThirdParty/libxml2/vtklibxml2/xmlschemas.c
     sed -i 's/fprintf(output, shift)/fprintf(output, "%s", shift)/g' ./ThirdParty/libxml2/vtklibxml2/xpath.c
@@ -83,7 +83,7 @@ in stdenv.mkDerivation {
     "-DVTK_MODULE_USE_EXTERNAL_vtkpng=ON"
     "-DVTK_MODULE_USE_EXTERNAL_vtktiff=1"
     "-DVTK_MODULE_ENABLE_VTK_RenderingExternal=YES"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "-DOPENGL_INCLUDE_DIR=${libGL}/include"
     (lib.cmakeBool "VTK_OPENGL_HAS_EGL" enableEgl)
   ] ++ [
@@ -94,7 +94,7 @@ in stdenv.mkDerivation {
   ] ++ optionals enableQt [
     "-DVTK_GROUP_ENABLE_Qt:STRING=YES"
   ]
-    ++ optionals stdenv.isDarwin [ "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks" ]
+    ++ optionals stdenv.hostPlatform.isDarwin [ "-DOPENGL_INCLUDE_DIR=${OpenGL}/Library/Frameworks" ]
     ++ optionals enablePython [
       "-DVTK_WRAP_PYTHON:BOOL=ON"
       "-DVTK_PYTHON_VERSION:STRING=${pythonMajor}"
diff --git a/pkgs/development/libraries/vulkan-headers/default.nix b/pkgs/development/libraries/vulkan-headers/default.nix
index 9b5916810ab0..3a0d14eb9b0e 100644
--- a/pkgs/development/libraries/vulkan-headers/default.nix
+++ b/pkgs/development/libraries/vulkan-headers/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   # TODO: investigate why <algorithm> isn't found
-  cmakeFlags = lib.optionals stdenv.isDarwin [ "-DVULKAN_HEADERS_ENABLE_MODULE=OFF" ];
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "-DVULKAN_HEADERS_ENABLE_MODULE=OFF" ];
 
   src = fetchFromGitHub {
     owner = "KhronosGroup";
diff --git a/pkgs/development/libraries/vulkan-loader/default.nix b/pkgs/development/libraries/vulkan-loader/default.nix
index a43dda1b5f83..3c002d197ff5 100644
--- a/pkgs/development/libraries/vulkan-loader/default.nix
+++ b/pkgs/development/libraries/vulkan-loader/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   patches = [ ./fix-pkgconfig.patch ]
-    ++ lib.optionals stdenv.is32bit [
+    ++ lib.optionals stdenv.hostPlatform.is32bit [
       # Backport patch to support 64-bit inodes on 32-bit systems
       # FIXME: remove in next update
       (fetchpatch {
@@ -25,11 +25,11 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ vulkan-headers ]
-    ++ lib.optionals stdenv.isLinux [ libX11 libxcb libXrandr wayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libX11 libxcb libXrandr wayland ];
 
   cmakeFlags = [ "-DCMAKE_INSTALL_INCLUDEDIR=${vulkan-headers}/include" ]
-    ++ lib.optional stdenv.isDarwin "-DSYSCONFDIR=${moltenvk}/share"
-    ++ lib.optional stdenv.isLinux "-DSYSCONFDIR=${addDriverRunpath.driverLink}/share"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-DSYSCONFDIR=${moltenvk}/share"
+    ++ lib.optional stdenv.hostPlatform.isLinux "-DSYSCONFDIR=${addDriverRunpath.driverLink}/share"
     ++ lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) "-DUSE_GAS=OFF";
 
   outputs = [ "out" "dev" ];
diff --git a/pkgs/development/libraries/vxl/default.nix b/pkgs/development/libraries/vxl/default.nix
index b7173ed93701..9ee55b47d457 100644
--- a/pkgs/development/libraries/vxl/default.nix
+++ b/pkgs/development/libraries/vxl/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # test failure on aarch64-linux; unknown reason:
-  cmakeFlags = lib.optionals stdenv.isAarch64 [ "-DCMAKE_CTEST_ARGUMENTS='-E vgl_test_frustum_3d'" ];
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isAarch64 [ "-DCMAKE_CTEST_ARGUMENTS='-E vgl_test_frustum_3d'" ];
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/wangle/default.nix b/pkgs/development/libraries/wangle/default.nix
index e90d05318eac..d07145641a70 100644
--- a/pkgs/development/libraries/wangle/default.nix
+++ b/pkgs/development/libraries/wangle/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
   cmakeFlags = [
     "-Wno-dev"
     (lib.cmakeBool "BUILD_TESTS" finalAttrs.finalPackage.doCheck)
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
@@ -64,7 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
 
       # https://github.com/facebook/wangle/issues/206
       "SSLContextManagerTest.TestSessionContextCertRemoval"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # flaky
       "BroadcastPoolTest.ThreadLocalPool"
       "Bootstrap.UDPClientServerTest"
diff --git a/pkgs/development/libraries/wayland/default.nix b/pkgs/development/libraries/wayland/default.nix
index 3cd2ba5dbe68..72ba54250b51 100644
--- a/pkgs/development/libraries/wayland/default.nix
+++ b/pkgs/development/libraries/wayland/default.nix
@@ -5,7 +5,7 @@
 , pkg-config
 , ninja
 , wayland-scanner
-, withTests ? stdenv.isLinux
+, withTests ? stdenv.hostPlatform.isLinux
 , libffi
 , epoll-shim
 , withDocumentation ? stdenv.hostPlatform == stdenv.buildPlatform
diff --git a/pkgs/development/libraries/webkitgtk/default.nix b/pkgs/development/libraries/webkitgtk/default.nix
index ecf306966c1f..5ad079e133ca 100644
--- a/pkgs/development/libraries/webkitgtk/default.nix
+++ b/pkgs/development/libraries/webkitgtk/default.nix
@@ -80,14 +80,14 @@ stdenv.mkDerivation (finalAttrs: {
 
   # https://github.com/NixOS/nixpkgs/issues/153528
   # Can't be linked within a 4GB address space.
-  separateDebugInfo = stdenv.isLinux && !stdenv.is32bit;
+  separateDebugInfo = stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.is32bit;
 
   src = fetchurl {
     url = "https://webkitgtk.org/releases/webkitgtk-${finalAttrs.version}.tar.xz";
     hash = "sha256-3ILQQuysqYGkhSNXwG5SNXQzGc8QqUzTatQbl4g6C1Q=";
   };
 
-  patches = lib.optionals stdenv.isLinux [
+  patches = lib.optionals stdenv.hostPlatform.isLinux [
     (substituteAll {
       src = ./fix-bubblewrap-paths.patch;
       inherit (builtins) storeDir;
@@ -118,7 +118,7 @@ stdenv.mkDerivation (finalAttrs: {
     gi-docgen
     glib # for gdbus-codegen
     unifdef
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     wayland-scanner
   ];
 
@@ -151,10 +151,10 @@ stdenv.mkDerivation (finalAttrs: {
     p11-kit
     sqlite
     woff2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libedit
     readline
-  ] ++ lib.optional (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0") (
+  ] ++ lib.optional (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0") (
     # this can likely be removed as:
     # "libproc.h is included in the 10.12 SDK Libsystem and should be identical to this one."
     # but the package is marked broken on darwin so unable to test
@@ -166,7 +166,7 @@ stdenv.mkDerivation (finalAttrs: {
     runCommand "webkitgtk_headers" { } ''
       install -Dm444 "${lib.getDev apple_sdk.sdk}"/include/libproc.h "$out"/include/libproc.h
     ''
-  ) ++ lib.optionals stdenv.isLinux [
+  ) ++ lib.optionals stdenv.hostPlatform.isLinux [
     libseccomp
     libmanette
     wayland
@@ -200,12 +200,12 @@ stdenv.mkDerivation (finalAttrs: {
       "-DUSE_SOUP2=${cmakeBool (lib.versions.major libsoup.version == "2")}"
       "-DUSE_LIBSECRET=${cmakeBool withLibsecret}"
       "-DENABLE_EXPERIMENTAL_FEATURES=${cmakeBool enableExperimental}"
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       # Have to be explicitly specified when cross.
       # https://github.com/WebKit/WebKit/commit/a84036c6d1d66d723f217a4c29eee76f2039a353
       "-DBWRAP_EXECUTABLE=${lib.getExe bubblewrap}"
       "-DDBUS_PROXY_EXECUTABLE=${lib.getExe xdg-dbus-proxy}"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-DENABLE_GAMEPAD=OFF"
       "-DENABLE_GTKDOC=OFF"
       "-DENABLE_MINIBROWSER=OFF"
@@ -244,6 +244,6 @@ stdenv.mkDerivation (finalAttrs: {
     ];
     platforms = platforms.linux ++ platforms.darwin;
     maintainers = teams.gnome.members;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/development/libraries/webrtc-audio-processing/0.3.nix b/pkgs/development/libraries/webrtc-audio-processing/0.3.nix
index 3ac5e2bd4adc..a3efc646d319 100644
--- a/pkgs/development/libraries/webrtc-audio-processing/0.3.nix
+++ b/pkgs/development/libraries/webrtc-audio-processing/0.3.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     ./enable-powerpc.patch
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ ApplicationServices ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ ApplicationServices ]);
 
   patchPhase = lib.optionalString stdenv.hostPlatform.isMusl ''
     substituteInPlace webrtc/base/checks.cc --replace 'defined(__UCLIBC__)' 1
diff --git a/pkgs/development/libraries/webrtc-audio-processing/default.nix b/pkgs/development/libraries/webrtc-audio-processing/default.nix
index b25ea77b44b4..1a34ade3cee0 100644
--- a/pkgs/development/libraries/webrtc-audio-processing/default.nix
+++ b/pkgs/development/libraries/webrtc-audio-processing/default.nix
@@ -42,9 +42,9 @@ stdenv.mkDerivation rec {
     abseil-cpp
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ ApplicationServices Foundation ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ ApplicationServices Foundation ]);
 
-  env = lib.optionalAttrs stdenv.isx86_32 {
+  env = lib.optionalAttrs stdenv.hostPlatform.isx86_32 {
     # https://gitlab.freedesktop.org/pulseaudio/webrtc-audio-processing/-/issues/5
     NIX_CFLAGS_COMPILE = "-msse2";
   };
diff --git a/pkgs/development/libraries/wolfssl/default.nix b/pkgs/development/libraries/wolfssl/default.nix
index c55ad0010d53..aeef5a8c4705 100644
--- a/pkgs/development/libraries/wolfssl/default.nix
+++ b/pkgs/development/libraries/wolfssl/default.nix
@@ -54,14 +54,14 @@ stdenv.mkDerivation (finalAttrs: {
     # Enable AVX/AVX2/AES-NI instructions, gated by runtime detection via CPUID.
     "--enable-intelasm"
     "--enable-aesni"
-  ] ++ lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin) [
     # No runtime detection under ARM and no platform function checks like for X86.
     # However, all ARM macOS systems have the supported extensions autodetected in the configure script.
     "--enable-armasm=inline"
   ] ++ extraConfigureFlags;
 
   # Breaks tls13 tests on aarch64-darwin.
-  hardeningDisable = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ "zerocallusedregs" ];
+  hardeningDisable = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ "zerocallusedregs" ];
 
   # LTO should help with the C implementations.
   env.NIX_CFLAGS_COMPILE = lib.optionalString enableLto "-flto";
@@ -74,7 +74,7 @@ stdenv.mkDerivation (finalAttrs: {
     "out"
   ];
 
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/libraries/wxSVG/default.nix b/pkgs/development/libraries/wxSVG/default.nix
index d14a77a67004..5182cc2ff955 100644
--- a/pkgs/development/libraries/wxSVG/default.nix
+++ b/pkgs/development/libraries/wxSVG/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     libexif
     pango
     wxGTK
-  ] ++ lib.optional stdenv.isDarwin Cocoa;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/wxsqlite3/default.nix b/pkgs/development/libraries/wxsqlite3/default.nix
index e986ab87ffac..7ad997e6d6da 100644
--- a/pkgs/development/libraries/wxsqlite3/default.nix
+++ b/pkgs/development/libraries/wxsqlite3/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
 
   buildInputs = [ sqlite wxGTK ]
-    ++ lib.optionals (stdenv.isDarwin) [ Cocoa setfile rez derez ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ Cocoa setfile rez derez ];
 
   meta = with lib; {
     homepage = "https://utelle.github.io/wxsqlite3/";
diff --git a/pkgs/development/libraries/wxsqliteplus/default.nix b/pkgs/development/libraries/wxsqliteplus/default.nix
index 0775dca688b4..2d980c69cbe6 100644
--- a/pkgs/development/libraries/wxsqliteplus/default.nix
+++ b/pkgs/development/libraries/wxsqliteplus/default.nix
@@ -15,23 +15,23 @@ stdenv.mkDerivation rec {
     sed -i '/WX_CLEAR_ARRAY/s/$/;/' src/{createtable,sqlite3table}.cpp
   '';
 
-  buildInputs = [ wxGTK wxsqlite3 sqlite ] ++ lib.optional stdenv.isDarwin Cocoa;
+  buildInputs = [ wxGTK wxsqlite3 sqlite ] ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   makeFlags = [
     "LDFLAGS=-L${wxsqlite3}/lib"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "SETFILE=${setfile}/bin/SetFile"
   ];
 
   preBuild = ''
     sed -ie 's|all: $(LIBPREFIX)wxsqlite$(LIBEXT)|all: |g' Makefile
     sed -ie 's|wxsqliteplus$(EXEEXT): $(WXSQLITEPLUS_OBJECTS) $(LIBPREFIX)wxsqlite$(LIBEXT)|wxsqliteplus$(EXEEXT):  $(WXSQLITEPLUS_OBJECTS) |g' Makefile
-    sed -ie 's|-lwxsqlite |-lwxcode_${if stdenv.isDarwin then "osx_cocoau_wxsqlite3-3.2.0" else "gtk3u_wxsqlite3-3.2"} |g' Makefile
+    sed -ie 's|-lwxsqlite |-lwxcode_${if stdenv.hostPlatform.isDarwin then "osx_cocoau_wxsqlite3-3.2.0" else "gtk3u_wxsqlite3-3.2"} |g' Makefile
   '';
 
   installPhase = ''
-    install -D ${lib.optionalString stdenv.isDarwin "wxsqliteplus.app/Contents/MacOS/"}wxsqliteplus $out/bin/wxsqliteplus
-  '' + lib.optionalString stdenv.isDarwin ''
+    install -D ${lib.optionalString stdenv.hostPlatform.isDarwin "wxsqliteplus.app/Contents/MacOS/"}wxsqliteplus $out/bin/wxsqliteplus
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv wxsqliteplus.app $out/Applications/
   '';
diff --git a/pkgs/development/libraries/wxwidgets/wxGTK31.nix b/pkgs/development/libraries/wxwidgets/wxGTK31.nix
index be0c45c701dc..21333afe5e8e 100644
--- a/pkgs/development/libraries/wxwidgets/wxGTK31.nix
+++ b/pkgs/development/libraries/wxwidgets/wxGTK31.nix
@@ -18,8 +18,8 @@
 , withCurl ? false
 , withPrivateFonts ? false
 , withEGL ? true
-, withMesa ? !stdenv.isDarwin
-, withWebKit ? stdenv.isDarwin
+, withMesa ? !stdenv.hostPlatform.isDarwin
+, withWebKit ? stdenv.hostPlatform.isDarwin
 , webkitgtk
 , setfile
 , AGL
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     gst_all_1.gst-plugins-base
     gst_all_1.gstreamer
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     gtk3
     libSM
     libXinerama
@@ -64,9 +64,9 @@ stdenv.mkDerivation rec {
   ]
   ++ lib.optional withCurl curl
   ++ lib.optional withMesa libGLU
-  ++ lib.optional (withWebKit && !stdenv.isDarwin) webkitgtk
-  ++ lib.optional (withWebKit && stdenv.isDarwin) WebKit
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optional (withWebKit && !stdenv.hostPlatform.isDarwin) webkitgtk
+  ++ lib.optional (withWebKit && stdenv.hostPlatform.isDarwin) WebKit
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     setfile
     Carbon
     Cocoa
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
     WebKit
   ];
 
-  propagatedBuildInputs = lib.optional stdenv.isDarwin AGL;
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isDarwin AGL;
 
   configureFlags = [
     "--disable-precomp-headers"
@@ -92,7 +92,7 @@ stdenv.mkDerivation rec {
   ++ lib.optional withCurl "--enable-webrequest"
   ++ lib.optional withPrivateFonts "--enable-privatefonts"
   ++ lib.optional withMesa "--with-opengl"
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--with-osx_cocoa"
     "--with-libiconv"
   ] ++ lib.optionals withWebKit [
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     "--enable-webviewwebkit"
   ];
 
-  SEARCH_LIB = lib.optionalString (!stdenv.isDarwin) "${libGLU.out}/lib ${libGL.out}/lib ";
+  SEARCH_LIB = lib.optionalString (!stdenv.hostPlatform.isDarwin) "${libGLU.out}/lib ${libGL.out}/lib ";
 
   preConfigure = ''
     substituteInPlace configure --replace \
@@ -109,7 +109,7 @@ stdenv.mkDerivation rec {
       'SEARCH_LIB=' 'DUMMY_SEARCH_LIB='
     substituteInPlace configure --replace \
       /usr /no-such-path
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace \
       'ac_cv_prog_SETFILE="/Developer/Tools/SetFile"' \
       'ac_cv_prog_SETFILE="${setfile}/bin/SetFile"'
diff --git a/pkgs/development/libraries/wxwidgets/wxGTK32.nix b/pkgs/development/libraries/wxwidgets/wxGTK32.nix
index a77dedb0c6ee..055000cfa68c 100644
--- a/pkgs/development/libraries/wxwidgets/wxGTK32.nix
+++ b/pkgs/development/libraries/wxwidgets/wxGTK32.nix
@@ -20,7 +20,7 @@
 , compat28 ? false
 , compat30 ? true
 , unicode ? true
-, withMesa ? !stdenv.isDarwin
+, withMesa ? !stdenv.hostPlatform.isDarwin
 , withWebKit ? true
 , webkitgtk
 , setfile
@@ -69,7 +69,7 @@ stdenv.mkDerivation rec {
     libjpeg_turbo
     zlib
     pcre2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     gtk3
     libSM
     libXinerama
@@ -78,9 +78,9 @@ stdenv.mkDerivation rec {
     xorgproto
   ]
   ++ lib.optional withMesa libGLU
-  ++ lib.optional (withWebKit && stdenv.isLinux) webkitgtk
-  ++ lib.optional (withWebKit && stdenv.isDarwin) WebKit
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optional (withWebKit && stdenv.hostPlatform.isLinux) webkitgtk
+  ++ lib.optional (withWebKit && stdenv.hostPlatform.isDarwin) WebKit
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     expat
     setfile
     Carbon
@@ -92,7 +92,7 @@ stdenv.mkDerivation rec {
     WebKit
   ];
 
-  propagatedBuildInputs = lib.optional stdenv.isDarwin AGL;
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isDarwin AGL;
 
   configureFlags = [
     "--disable-precomp-headers"
@@ -106,7 +106,7 @@ stdenv.mkDerivation rec {
     (if compat30 then "--enable-compat30" else "--disable-compat30")
   ] ++ lib.optional unicode "--enable-unicode"
   ++ lib.optional withMesa "--with-opengl"
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--with-osx_cocoa"
     "--with-libiconv"
   ] ++ lib.optionals withWebKit [
@@ -114,12 +114,12 @@ stdenv.mkDerivation rec {
     "--enable-webviewwebkit"
   ];
 
-  SEARCH_LIB = lib.optionalString (!stdenv.isDarwin) "${libGLU.out}/lib ${libGL.out}/lib";
+  SEARCH_LIB = lib.optionalString (!stdenv.hostPlatform.isDarwin) "${libGLU.out}/lib ${libGL.out}/lib";
 
   preConfigure = ''
     cp -r ${catch}/* 3rdparty/catch/
     cp -r ${nanosvg}/* 3rdparty/nanosvg/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure \
       --replace 'ac_cv_prog_SETFILE="/Developer/Tools/SetFile"' 'ac_cv_prog_SETFILE="${setfile}/bin/SetFile"'
     substituteInPlace configure \
diff --git a/pkgs/development/libraries/x264/default.nix b/pkgs/development/libraries/x264/default.nix
index 2be8ea48b8e2..de4a3d8d7843 100644
--- a/pkgs/development/libraries/x264/default.nix
+++ b/pkgs/development/libraries/x264/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     ./disable-arm-neon-default.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace '$(if $(STRIP), $(STRIP) -x $@)' '$(if $(STRIP), $(STRIP) -S $@)'
   '';
 
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags = lib.optional enableShared "--enable-shared"
-    ++ lib.optional (!stdenv.isi686) "--enable-pic"
+    ++ lib.optional (!stdenv.hostPlatform.isi686) "--enable-pic"
     ++ lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) "--cross-prefix=${stdenv.cc.targetPrefix}";
 
   makeFlags = [
diff --git a/pkgs/development/libraries/x265/default.nix b/pkgs/development/libraries/x265/default.nix
index 8e16ca72e003..a436a59aead7 100644
--- a/pkgs/development/libraries/x265/default.nix
+++ b/pkgs/development/libraries/x265/default.nix
@@ -10,14 +10,14 @@
 , numactl
 
   # Multi bit-depth support (8bit+10bit+12bit):
-, multibitdepthSupport ? (stdenv.is64bit && !(stdenv.isAarch64 && stdenv.isLinux))
+, multibitdepthSupport ? (stdenv.hostPlatform.is64bit && !(stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux))
 
   # Other options:
 , cliSupport ? true # Build standalone CLI application
 , custatsSupport ? false # Internal profiling of encoder work
 , debugSupport ? false # Run-time sanity checks (debugging)
 , ppaSupport ? false # PPA profiling instrumentation
-, unittestsSupport ? stdenv.isx86_64 # Unit tests - only testing x64 assembly
+, unittestsSupport ? stdenv.hostPlatform.isx86_64 # Unit tests - only testing x64 assembly
 , vtuneSupport ? false # Vtune profiling instrumentation
 , werrorSupport ? false # Warnings as errors
 }:
diff --git a/pkgs/development/libraries/xapian/default.nix b/pkgs/development/libraries/xapian/default.nix
index 0862fcfe25f6..c8a28166a7a4 100644
--- a/pkgs/development/libraries/xapian/default.nix
+++ b/pkgs/development/libraries/xapian/default.nix
@@ -34,13 +34,13 @@ let
 
     env = {
       AUTOMATED_TESTING = true; # https://trac.xapian.org/changeset/8be35f5e1/git
-    } // lib.optionalAttrs stdenv.is32bit {
+    } // lib.optionalAttrs stdenv.hostPlatform.is32bit {
       NIX_CFLAGS_COMPILE = "-fpermissive";
     };
 
     # the configure script thinks that Darwin has ___exp10
     # but it’s not available on my systems (or hydra apparently)
-    postConfigure = lib.optionalString stdenv.isDarwin ''
+    postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace config.h \
         --replace "#define HAVE___EXP10 1" "#undef HAVE___EXP10"
     '';
diff --git a/pkgs/development/libraries/xavs/default.nix b/pkgs/development/libraries/xavs/default.nix
index 2d0960e3ff52..14c4b0a7e588 100644
--- a/pkgs/development/libraries/xavs/default.nix
+++ b/pkgs/development/libraries/xavs/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     patchShebangs tools/patcheck
     patchShebangs tools/regression-test.pl
     patchShebangs tools/xavs-format
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace config.guess --replace 'uname -p' 'uname -m'
     substituteInPlace configure \
       --replace '-O4' '-O3' \
diff --git a/pkgs/development/libraries/xed/default.nix b/pkgs/development/libraries/xed/default.nix
index 1fb634a80b90..2918ae7f3fe8 100644
--- a/pkgs/development/libraries/xed/default.nix
+++ b/pkgs/development/libraries/xed/default.nix
@@ -25,7 +25,7 @@ in stdenv.mkDerivation rec {
     sha256 = "sha256-LF4iJ1/Z3OifCiir/kU3ufZqtiRLeaJeAwuBqP2BCF4=";
   };
 
-  nativeBuildInputs = [ mbuild ] ++ lib.optionals stdenv.isDarwin [ llvmPackages.bintools ];
+  nativeBuildInputs = [ mbuild ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ llvmPackages.bintools ];
 
   buildPhase = ''
     patchShebangs mfile.py
@@ -40,7 +40,7 @@ in stdenv.mkDerivation rec {
   dontInstall = true; # already installed during buildPhase
 
   meta = with lib; {
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     description = "Intel X86 Encoder Decoder (Intel XED)";
     homepage    = "https://intelxed.github.io/";
     license     = licenses.asl20;
diff --git a/pkgs/development/libraries/xgboost/default.nix b/pkgs/development/libraries/xgboost/default.nix
index 2b96bede313d..c294551eef50 100644
--- a/pkgs/development/libraries/xgboost/default.nix
+++ b/pkgs/development/libraries/xgboost/default.nix
@@ -67,7 +67,7 @@ effectiveStdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ cmake ]
-    ++ lib.optionals effectiveStdenv.isDarwin [ llvmPackages.openmp ]
+    ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [ llvmPackages.openmp ]
     ++ lib.optionals cudaSupport [ autoAddDriverRunpath ]
     ++ lib.optionals rLibrary [ R ];
 
diff --git a/pkgs/development/libraries/xml-security-c/default.nix b/pkgs/development/libraries/xml-security-c/default.nix
index d76b2031aa3f..d36804c6bce8 100644
--- a/pkgs/development/libraries/xml-security-c/default.nix
+++ b/pkgs/development/libraries/xml-security-c/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
       xercesc
       openssl
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       CoreServices
       SystemConfiguration
diff --git a/pkgs/development/libraries/xvidcore/default.nix b/pkgs/development/libraries/xvidcore/default.nix
index 5ec3d44dfb62..9a3c150b3d25 100644
--- a/pkgs/development/libraries/xvidcore/default.nix
+++ b/pkgs/development/libraries/xvidcore/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   preConfigure = ''
     # Configure script is not in the root of the source directory
     cd build/generic
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Undocumented darwin hack
     substituteInPlace configure --replace "-no-cpp-precomp" ""
   '';
@@ -20,18 +20,18 @@ stdenv.mkDerivation rec {
   configureFlags = [ ]
     # Undocumented darwin hack (assembly is probably disabled due to an
     # issue with nasm, however yasm is now used)
-    ++ lib.optional stdenv.isDarwin "--enable-macosx_module --disable-assembly";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--enable-macosx_module --disable-assembly";
 
   nativeBuildInputs = [ ]
-    ++ lib.optional (!stdenv.isDarwin) yasm;
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) yasm;
 
   buildInputs = [ ]
     # Undocumented darwin hack
-    ++ lib.optionals stdenv.isDarwin [ autoconf automake libtool ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ autoconf automake libtool ];
 
   # Don't remove static libraries (e.g. 'libs/*.a') on darwin.  They're needed to
   # compile ffmpeg (and perhaps other things).
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     rm $out/lib/*.a
   '';
 
diff --git a/pkgs/development/libraries/yubico-pam/default.nix b/pkgs/development/libraries/yubico-pam/default.nix
index 3af451ec84e0..e60008994b03 100644
--- a/pkgs/development/libraries/yubico-pam/default.nix
+++ b/pkgs/development/libraries/yubico-pam/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config asciidoc libxslt docbook_xsl ];
   buildInputs = [ pam yubikey-personalization libyubikey libykclient ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices SystemConfiguration ];
 
   meta = with lib; {
     description = "Yubico PAM module";
diff --git a/pkgs/development/libraries/zeroc-ice/default.nix b/pkgs/development/libraries/zeroc-ice/default.nix
index 9c8db3159396..5c6a0ba9bbe1 100644
--- a/pkgs/development/libraries/zeroc-ice/default.nix
+++ b/pkgs/development/libraries/zeroc-ice/default.nix
@@ -78,6 +78,6 @@ in stdenv.mkDerivation rec {
     license = licenses.gpl2Only;
     platforms = platforms.unix;
     maintainers = with maintainers; [ abbradar ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/lisp-modules/ql.nix b/pkgs/development/lisp-modules/ql.nix
index 91a458c0ef08..af6334671230 100644
--- a/pkgs/development/lisp-modules/ql.nix
+++ b/pkgs/development/lisp-modules/ql.nix
@@ -86,7 +86,7 @@ let
     cffi-libffi = super.cffi-libffi.overrideLispAttrs (o: {
       nativeBuildInputs = [ pkgs.libffi ];
       nativeLibs = [ pkgs.libffi ];
-      patches = lib.optionals stdenv.isDarwin [ ./patches/cffi-libffi-darwin-ffi-h.patch ];
+      patches = lib.optionals stdenv.hostPlatform.isDarwin [ ./patches/cffi-libffi-darwin-ffi-h.patch ];
     });
     cl-rabbit = super.cl-rabbit.overrideLispAttrs (o: {
       nativeBuildInputs = [ pkgs.rabbitmq-c ];
diff --git a/pkgs/development/lua-modules/nfd/default.nix b/pkgs/development/lua-modules/nfd/default.nix
index 0bd421ede7ce..66624c6f0955 100644
--- a/pkgs/development/lua-modules/nfd/default.nix
+++ b/pkgs/development/lua-modules/nfd/default.nix
@@ -24,7 +24,7 @@ buildLuarocksPackage {
   luarocksConfig.variables.LUA_LIBDIR = "${lua}/lib";
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   postInstall = ''
     find $out -name nfd_zenity.so -execdir mv {} nfd.so \;
diff --git a/pkgs/development/lua-modules/overrides.nix b/pkgs/development/lua-modules/overrides.nix
index 58cae66490ce..61c44022e9ec 100644
--- a/pkgs/development/lua-modules/overrides.nix
+++ b/pkgs/development/lua-modules/overrides.nix
@@ -461,7 +461,7 @@ in
     ];
   });
 
-  luasystem = prev.luasystem.overrideAttrs (oa: lib.optionalAttrs stdenv.isLinux {
+  luasystem = prev.luasystem.overrideAttrs (oa: lib.optionalAttrs stdenv.hostPlatform.isLinux {
     buildInputs = [ glibc.out ];
   });
 
@@ -503,7 +503,7 @@ in
 
     # ld: symbol(s) not found for architecture arm64
     # clang-16: error: linker command failed with exit code 1 (use -v to see invocation)
-    meta.broken = stdenv.isDarwin;
+    meta.broken = stdenv.hostPlatform.isDarwin;
   });
 
   lush-nvim = prev.lush-nvim.overrideAttrs (drv: {
@@ -644,7 +644,7 @@ in
     buildInputs = [ libuv final.lua ];
 
     nativeBuildInputs = [ pkg-config cmake ]
-      ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
   };
 
   luv = prev.luv.overrideAttrs (oa: {
@@ -785,7 +785,7 @@ in
   });
 
   sqlite = prev.sqlite.overrideAttrs (drv: {
-    doCheck = stdenv.isLinux;
+    doCheck = stdenv.hostPlatform.isLinux;
     nativeCheckInputs = [ final.plenary-nvim neovim-unwrapped ];
 
     # the plugin loads the library from either the LIBSQLITE env
@@ -835,7 +835,7 @@ in
       hash = "sha256-PLihirhJshcUQI3L1eTcnQiZvocDl29eQHhdBwJQRU8=";
     };
 
-    NIX_LDFLAGS = lib.optionalString stdenv.isDarwin
+    NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin
       (if lua.pkgs.isLuaJIT then "-lluajit-${lua.luaversion}" else "-llua");
 
     nativeBuildInputs = oa.nativeBuildInputs ++ [
diff --git a/pkgs/development/misc/datafusion/default.nix b/pkgs/development/misc/datafusion/default.nix
index 78b8023c5f6d..b89e915a7742 100644
--- a/pkgs/development/misc/datafusion/default.nix
+++ b/pkgs/development/misc/datafusion/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-0a/O9nNi3JLufQxG+5EgCXtV0y03X7R6UY+f/tVGB90=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/misc/juce/default.nix b/pkgs/development/misc/juce/default.nix
index 0899a948019e..f0c54f1dca20 100644
--- a/pkgs/development/misc/juce/default.nix
+++ b/pkgs/development/misc/juce/default.nix
@@ -48,11 +48,11 @@ stdenv.mkDerivation (finalAttrs: {
     curl # libcurl.so
     stdenv.cc.cc.lib # libstdc++.so libgcc_s.so
     pcre # libpcre2.pc
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib # libasound.so
     libglvnd # libGL.so
     webkitgtk # webkit2gtk-4.0
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     darwin.apple_sdk.frameworks.MetalKit
     darwin.apple_sdk.frameworks.WebKit
diff --git a/pkgs/development/misc/msp430/mspdebug.nix b/pkgs/development/misc/msp430/mspdebug.nix
index 18462c456ce2..c24ca3b0c262 100644
--- a/pkgs/development/misc/msp430/mspdebug.nix
+++ b/pkgs/development/misc/msp430/mspdebug.nix
@@ -10,7 +10,7 @@
 , enableMspds ? false
 }:
 
-assert stdenv.isDarwin -> hidapi != null && pkg-config != null;
+assert stdenv.hostPlatform.isDarwin -> hidapi != null && pkg-config != null;
 assert enableReadline -> readline != null;
 assert enableMspds -> mspds != null;
 
@@ -25,13 +25,13 @@ stdenv.mkDerivation rec {
   };
 
   enableParallelBuilding = true;
-  nativeBuildInputs = lib.optional stdenv.isDarwin pkg-config
-  ++ lib.optional (enableMspds && stdenv.isLinux) autoPatchelfHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin pkg-config
+  ++ lib.optional (enableMspds && stdenv.hostPlatform.isLinux) autoPatchelfHook;
   buildInputs = [ libusb-compat-0_1 ]
-  ++ lib.optional stdenv.isDarwin hidapi
+  ++ lib.optional stdenv.hostPlatform.isDarwin hidapi
   ++ lib.optional enableReadline readline;
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # TODO: remove once a new 0.26+ release is made
     substituteInPlace drivers/tilib_api.c --replace .so ${stdenv.hostPlatform.extensions.sharedLibrary}
 
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
 
   # TODO: wrap with MSPDEBUG_TILIB_PATH env var instead of these rpath fixups in 0.26+
   runtimeDependencies = lib.optional enableMspds mspds;
-  postFixup = lib.optionalString (enableMspds && stdenv.isDarwin) ''
+  postFixup = lib.optionalString (enableMspds && stdenv.hostPlatform.isDarwin) ''
     # autoPatchelfHook only works on linux so...
     for dep in $runtimeDependencies; do
       install_name_tool -add_rpath $dep/lib $out/bin/$pname
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "PREFIX=$(out)" "INSTALL=install" ];
   makeFlags = [ "UNAME_S=$(unameS)" ] ++
     lib.optional (!enableReadline) "WITHOUT_READLINE=1";
-  unameS = lib.optionalString stdenv.isDarwin "Darwin";
+  unameS = lib.optionalString stdenv.hostPlatform.isDarwin "Darwin";
 
   meta = with lib; {
     description = "Free programmer, debugger, and gdb proxy for MSP430 MCUs";
diff --git a/pkgs/development/misc/msp430/mspds/binary.nix b/pkgs/development/misc/msp430/mspds/binary.nix
index 3558599c2de0..4dc3ec869bda 100644
--- a/pkgs/development/misc/msp430/mspds/binary.nix
+++ b/pkgs/development/misc/msp430/mspds/binary.nix
@@ -1,7 +1,7 @@
 { stdenv, lib, fetchurl, unzip, autoPatchelfHook }:
 
 let
-  archPostfix = lib.optionalString (stdenv.is64bit && !stdenv.isDarwin) "_64";
+  archPostfix = lib.optionalString (stdenv.hostPlatform.is64bit && !stdenv.hostPlatform.isDarwin) "_64";
 in stdenv.mkDerivation rec {
   pname = "msp-debug-stack-bin";
   version = "3.15.1.1";
@@ -16,7 +16,7 @@ in stdenv.mkDerivation rec {
     else "libmsp430${archPostfix}${stdenv.hostPlatform.extensions.sharedLibrary}";
 
   nativeBuildInputs = [ unzip ]
-    ++ lib.optional stdenv.isLinux autoPatchelfHook;
+    ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
   buildInputs = [ stdenv.cc.cc ];
 
   installPhase = ''
diff --git a/pkgs/development/misc/msp430/mspds/default.nix b/pkgs/development/misc/msp430/mspds/default.nix
index 75dd08805f3f..17ee5cd76c50 100644
--- a/pkgs/development/misc/msp430/mspds/default.nix
+++ b/pkgs/development/misc/msp430/mspds/default.nix
@@ -6,10 +6,10 @@
 , libusb1 ? null
 }:
 
-assert stdenv.isLinux -> libusb1 != null;
+assert stdenv.hostPlatform.isLinux -> libusb1 != null;
 
 let
-  hidapiDriver = lib.optionalString stdenv.isLinux "-libusb";
+  hidapiDriver = lib.optionalString stdenv.hostPlatform.isLinux "-libusb";
 
 in stdenv.mkDerivation {
   pname = "msp-debug-stack";
@@ -32,7 +32,7 @@ in stdenv.mkDerivation {
   preBuild = ''
     rm ThirdParty/src/pugixml.cpp
     rm ThirdParty/include/pugi{config,xml}.hpp
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     makeFlagsArray+=(OUTNAME="-install_name ")
   '';
 
@@ -43,7 +43,7 @@ in stdenv.mkDerivation {
 
   nativeBuildInputs = [ unzip ];
   buildInputs = [ boost hidapi pugixml ]
-    ++ lib.optional stdenv.isLinux libusb1;
+    ++ lib.optional stdenv.hostPlatform.isLinux libusb1;
 
   meta = with lib; {
     description = "TI MSP430 FET debug driver";
diff --git a/pkgs/development/misc/resholve/test.nix b/pkgs/development/misc/resholve/test.nix
index ab61884963aa..654f8a4577f5 100644
--- a/pkgs/development/misc/resholve/test.nix
+++ b/pkgs/development/misc/resholve/test.nix
@@ -234,7 +234,7 @@ rec {
       ncurses
       procps
       ps
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       nixos-install-tools
       nixos-rebuild
     ];
@@ -258,7 +258,7 @@ rec {
     tset fake args
     ps fake args
     top fake args
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     nixos-generate-config fake args
     nixos-rebuild fake args
   '');
@@ -279,7 +279,7 @@ rec {
   inherit shunit2;
   inherit xdg-utils;
   inherit yadm;
-} // lib.optionalAttrs stdenv.isLinux {
+} // lib.optionalAttrs stdenv.hostPlatform.isLinux {
   inherit arch-install-scripts;
   inherit dgoss;
   inherit rancid;
@@ -287,6 +287,6 @@ rec {
   inherit wgnord;
   inherit wsl-vpnkit;
   inherit zxfer;
-} // lib.optionalAttrs (stdenv.isLinux && (stdenv.isi686 || stdenv.isx86_64)) {
+} // lib.optionalAttrs (stdenv.hostPlatform.isLinux && (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isx86_64)) {
   inherit s0ix-selftest-tool;
 }
diff --git a/pkgs/development/mobile/androidenv/cmake.nix b/pkgs/development/mobile/androidenv/cmake.nix
index 7df24ad4cc22..833c96a2691c 100644
--- a/pkgs/development/mobile/androidenv/cmake.nix
+++ b/pkgs/development/mobile/androidenv/cmake.nix
@@ -2,7 +2,7 @@
 
 deployAndroidPackage {
   inherit package os;
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
   buildInputs = lib.optionals (os == "linux") [ pkgs.stdenv.cc.libc pkgs.stdenv.cc.cc pkgs.ncurses5 ];
   patchInstructions = lib.optionalString (os == "linux") ''
     autoPatchelf $packageBaseDir/bin
diff --git a/pkgs/development/mobile/androidenv/cmdline-tools.nix b/pkgs/development/mobile/androidenv/cmdline-tools.nix
index 0279b948a7ab..3c05fa8634c2 100644
--- a/pkgs/development/mobile/androidenv/cmdline-tools.nix
+++ b/pkgs/development/mobile/androidenv/cmdline-tools.nix
@@ -4,7 +4,7 @@ deployAndroidPackage {
   name = "androidsdk";
   inherit package os;
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   patchInstructions = ''
     ${lib.optionalString (os == "linux") ''
diff --git a/pkgs/development/mobile/androidenv/compose-android-packages.nix b/pkgs/development/mobile/androidenv/compose-android-packages.nix
index 72dc64a7e0c2..a880c8fc9190 100644
--- a/pkgs/development/mobile/androidenv/compose-android-packages.nix
+++ b/pkgs/development/mobile/androidenv/compose-android-packages.nix
@@ -27,8 +27,8 @@
 
 let
   # Determine the Android os identifier from Nix's system identifier
-  os = if stdenv.isLinux then "linux"
-    else if stdenv.isDarwin then "macosx"
+  os = if stdenv.hostPlatform.isLinux then "linux"
+    else if stdenv.hostPlatform.isDarwin then "macosx"
     else throw "No Android SDK tarballs are available for system architecture: ${stdenv.system}";
 
   # Uses mkrepo.rb to create a repo spec.
diff --git a/pkgs/development/mobile/androidenv/ndk-bundle/default.nix b/pkgs/development/mobile/androidenv/ndk-bundle/default.nix
index 30a2e8171acc..b9c11cb46e97 100644
--- a/pkgs/development/mobile/androidenv/ndk-bundle/default.nix
+++ b/pkgs/development/mobile/androidenv/ndk-bundle/default.nix
@@ -10,7 +10,7 @@ in
 deployAndroidPackage rec {
   inherit package os;
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
   autoPatchelfIgnoreMissingDeps = [ "*" ];
   buildInputs = lib.optionals (os == "linux") [ pkgs.zlib pkgs.libcxx stdenv.cc.cc.lib ];
 
@@ -71,7 +71,7 @@ deployAndroidPackage rec {
   '';
 
   patchInstructions = patchOsAgnostic
-    + lib.optionalString stdenv.isLinux patchElfBnaries;
+    + lib.optionalString stdenv.hostPlatform.isLinux patchElfBnaries;
 
   noAuditTmpdir = true; # Audit script gets invoked by the build/ component in the path for the make standalone script
 }
diff --git a/pkgs/development/mobile/androidenv/patcher.nix b/pkgs/development/mobile/androidenv/patcher.nix
index c0252839cf23..f525033d236a 100644
--- a/pkgs/development/mobile/androidenv/patcher.nix
+++ b/pkgs/development/mobile/androidenv/patcher.nix
@@ -2,7 +2,7 @@
 
 deployAndroidPackage {
   inherit package os;
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
   patchInstructions = lib.optionalString (os == "linux") ''
     autoPatchelf $packageBaseDir/bin
   '';
diff --git a/pkgs/development/mobile/gomobile/default.nix b/pkgs/development/mobile/gomobile/default.nix
index c234c81d3894..61e3bb75617c 100644
--- a/pkgs/development/mobile/gomobile/default.nix
+++ b/pkgs/development/mobile/gomobile/default.nix
@@ -26,7 +26,7 @@ buildGoModule {
   doCheck = false;
 
   nativeBuildInputs = [ makeWrapper ]
-    ++ lib.optionals stdenv.isDarwin [ xcodeWrapper ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcodeWrapper ];
 
   # Prevent a non-deterministic temporary directory from polluting the resulting object files
   postPatch = ''
diff --git a/pkgs/development/mobile/titaniumenv/build-app.nix b/pkgs/development/mobile/titaniumenv/build-app.nix
index 42b70c64abe9..ef36dced9a31 100644
--- a/pkgs/development/mobile/titaniumenv/build-app.nix
+++ b/pkgs/development/mobile/titaniumenv/build-app.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation ({
   buildPhase = ''
     ${preBuild}
 
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Hack that provides a writable alloy package on macOS. Without it the build fails because of a file permission error.
       alloy=$(dirname $(type -p alloy))/..
       cp -rv $alloy/* alloy
@@ -76,7 +76,7 @@ stdenv.mkDerivation ({
       export GRADLE_USER_HOME=$TMPDIR/gradle
 
       ${if release then ''
-        ${lib.optionalString stdenv.isDarwin ''
+        ${lib.optionalString stdenv.hostPlatform.isDarwin ''
           # Signing the app does not work with OpenJDK on macOS, use host SDK instead
           export JAVA_HOME="$(/usr/libexec/java_home -v 1.8)"
         ''}
diff --git a/pkgs/development/mobile/xcodeenv/compose-xcodewrapper.nix b/pkgs/development/mobile/xcodeenv/compose-xcodewrapper.nix
index 5a888fb13b29..13c8e6e81827 100644
--- a/pkgs/development/mobile/xcodeenv/compose-xcodewrapper.nix
+++ b/pkgs/development/mobile/xcodeenv/compose-xcodewrapper.nix
@@ -3,7 +3,7 @@
   writeShellScriptBin }:
 { versions ? [ ] , xcodeBaseDir ? "/Applications/Xcode.app" }:
 
-assert stdenv.isDarwin;
+assert stdenv.hostPlatform.isDarwin;
 let
   xcodebuildPath = "${xcodeBaseDir}/Contents/Developer/usr/bin/xcodebuild";
 
diff --git a/pkgs/development/mobile/xpwn/default.nix b/pkgs/development/mobile/xpwn/default.nix
index efd8d538c090..8693282e4ee1 100644
--- a/pkgs/development/mobile/xpwn/default.nix
+++ b/pkgs/development/mobile/xpwn/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ zlib libpng bzip2 libusb-compat-0_1 openssl ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage    = "http://planetbeing.lighthouseapp.com/projects/15246-xpwn";
     description = "Custom NOR firmware loader/IPSW generator for the iPhone";
     license     = licenses.gpl3Plus;
diff --git a/pkgs/development/node-packages/composition.nix b/pkgs/development/node-packages/composition.nix
index 2e54104d7dce..4bd736ddc723 100644
--- a/pkgs/development/node-packages/composition.nix
+++ b/pkgs/development/node-packages/composition.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ./node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/pkgs/development/node-packages/node-env.nix b/pkgs/development/node-packages/node-env.nix
index bc1e36628ac8..eb94495aeba3 100644
--- a/pkgs/development/node-packages/node-env.nix
+++ b/pkgs/development/node-packages/node-env.nix
@@ -499,8 +499,8 @@ let
     stdenv.mkDerivation ({
       name = "${name}${if version == null then "" else "-${version}"}";
       buildInputs = [ tarWrapper python nodejs ]
-        ++ lib.optional (stdenv.isLinux) utillinux
-        ++ lib.optional (stdenv.isDarwin) libtool
+        ++ lib.optional (stdenv.hostPlatform.isLinux) utillinux
+        ++ lib.optional (stdenv.hostPlatform.isDarwin) libtool
         ++ buildInputs;
 
       inherit nodejs;
@@ -591,8 +591,8 @@ let
         name = "node-dependencies-${name}${if version == null then "" else "-${version}"}";
 
         buildInputs = [ tarWrapper python nodejs ]
-          ++ lib.optional (stdenv.isLinux) utillinux
-          ++ lib.optional (stdenv.isDarwin) libtool
+          ++ lib.optional (stdenv.hostPlatform.isLinux) utillinux
+          ++ lib.optional (stdenv.hostPlatform.isDarwin) libtool
           ++ buildInputs;
 
         inherit dontStrip; # Stripping may fail a build for some package deployments
@@ -662,7 +662,7 @@ let
     stdenv.mkDerivation ({
       name = "node-shell-${name}${if version == null then "" else "-${version}"}";
 
-      buildInputs = [ python nodejs ] ++ lib.optional (stdenv.isLinux) utillinux ++ buildInputs;
+      buildInputs = [ python nodejs ] ++ lib.optional (stdenv.hostPlatform.isLinux) utillinux ++ buildInputs;
       buildCommand = ''
         mkdir -p $out/bin
         cat > $out/bin/shell <<EOF
diff --git a/pkgs/development/node-packages/overrides.nix b/pkgs/development/node-packages/overrides.nix
index 68e91ca81853..5424ad35afa6 100644
--- a/pkgs/development/node-packages/overrides.nix
+++ b/pkgs/development/node-packages/overrides.nix
@@ -47,7 +47,7 @@ final: prev: {
 
   expo-cli = prev."expo-cli".override (oldAttrs: {
     # The traveling-fastlane-darwin optional dependency aborts build on Linux.
-    dependencies = builtins.filter (d: d.packageName != "@expo/traveling-fastlane-${if stdenv.isLinux then "darwin" else "linux"}") oldAttrs.dependencies;
+    dependencies = builtins.filter (d: d.packageName != "@expo/traveling-fastlane-${if stdenv.hostPlatform.isLinux then "darwin" else "linux"}") oldAttrs.dependencies;
   });
 
   fast-cli = prev.fast-cli.override {
@@ -92,7 +92,7 @@ final: prev: {
     nativeBuildInputs = [
       pkgs.pkg-config
       (pkgs.python3.withPackages (ps: [ ps.setuptools ]))
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       pkgs.xcbuild
     ];
     buildInputs = with pkgs; [
@@ -107,7 +107,7 @@ final: prev: {
       pixman
       cairo
       pango
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.Security
     ];
@@ -128,7 +128,7 @@ final: prev: {
 
     meta = oldAttrs.meta // {
       # ModuleNotFoundError: No module named 'distutils'
-      broken = stdenv.isDarwin; # still broken on darwin
+      broken = stdenv.hostPlatform.isDarwin; # still broken on darwin
     };
   });
 
@@ -151,7 +151,7 @@ final: prev: {
       pixman
       cairo
       pango
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreText
     ];
   };
@@ -160,7 +160,7 @@ final: prev: {
     nativeBuildInputs = [ pkgs.buildPackages.makeWrapper ];
     postFixup = ''
       wrapProgram "$out/bin/makam" --prefix PATH : ${lib.makeBinPath [ nodejs ]}
-      ${lib.optionalString stdenv.isLinux "patchelf --set-interpreter ${stdenv.cc.libc}/lib/ld-linux-x86-64.so.2 \"$out/lib/node_modules/makam/makam-bin-linux64\""}
+      ${lib.optionalString stdenv.hostPlatform.isLinux "patchelf --set-interpreter ${stdenv.cc.libc}/lib/ld-linux-x86-64.so.2 \"$out/lib/node_modules/makam/makam-bin-linux64\""}
     '';
   };
 
@@ -243,10 +243,10 @@ final: prev: {
   in{
     nativeBuildInputs = [ pkgs.buildPackages.makeWrapper ];
     dependencies = oldAttrs.dependencies
-      ++ lib.optional (stdenv.isLinux && stdenv.isx86_64) esbuild-linux-x64
-      ++ lib.optional (stdenv.isLinux && stdenv.isAarch64) esbuild-linux-arm64
-      ++ lib.optional (stdenv.isDarwin && stdenv.isx86_64) esbuild-darwin-x64
-      ++ lib.optional (stdenv.isDarwin && stdenv.isAarch64) esbuild-darwin-arm64;
+      ++ lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64) esbuild-linux-x64
+      ++ lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) esbuild-linux-arm64
+      ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) esbuild-darwin-x64
+      ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) esbuild-darwin-arm64;
     postInstall = ''
       wrapProgram "$out/bin/postcss" \
         --prefix NODE_PATH : ${final.postcss}/lib/node_modules \
@@ -353,7 +353,7 @@ final: prev: {
       cairo
       pango
       libjpeg
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreText
     ];
   };
@@ -383,7 +383,7 @@ final: prev: {
       pixman
       cairo
       pango
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreText
     ];
   };
diff --git a/pkgs/development/ocaml-modules/apron/default.nix b/pkgs/development/ocaml-modules/apron/default.nix
index fb93fd2f1875..7b993168e167 100644
--- a/pkgs/development/ocaml-modules/apron/default.nix
+++ b/pkgs/development/ocaml-modules/apron/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   configurePhase = ''
     runHook preConfigure
-    ./configure -prefix $out ${lib.optionalString stdenv.isDarwin "--no-strip"}
+    ./configure -prefix $out ${lib.optionalString stdenv.hostPlatform.isDarwin "--no-strip"}
     mkdir -p $out/lib/ocaml/${ocaml.version}/site-lib/stublibs
     runHook postConfigure
   '';
diff --git a/pkgs/development/ocaml-modules/arp/default.nix b/pkgs/development/ocaml-modules/arp/default.nix
index a4facc6cddfc..b8cc579e5661 100644
--- a/pkgs/development/ocaml-modules/arp/default.nix
+++ b/pkgs/development/ocaml-modules/arp/default.nix
@@ -47,7 +47,7 @@ buildDunePackage rec {
   ];
 
   ## NOTE: As of 18 april 2023 and ARP version 3.0.0, tests fail on Darwin.
-  doCheck = ! stdenv.isDarwin;
+  doCheck = ! stdenv.hostPlatform.isDarwin;
   checkInputs = [
     alcotest
     mirage-clock-unix
diff --git a/pkgs/development/ocaml-modules/bjack/default.nix b/pkgs/development/ocaml-modules/bjack/default.nix
index 197d31638d61..21052759233a 100644
--- a/pkgs/development/ocaml-modules/bjack/default.nix
+++ b/pkgs/development/ocaml-modules/bjack/default.nix
@@ -11,7 +11,7 @@ buildDunePackage rec {
     hash = "sha256-jIxxqBVWphWYyLh+24rTxk4WWfPPdGCvNdevFJEKw70=";
   };
 
-  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.isDarwin [ Accelerate CoreAudio ];
+  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Accelerate CoreAudio ];
   propagatedBuildInputs = [ libsamplerate libjack2 ];
 
   meta = with lib; {
diff --git a/pkgs/development/ocaml-modules/cairo2/default.nix b/pkgs/development/ocaml-modules/cairo2/default.nix
index 0b560f2004f6..eefac702d7ef 100644
--- a/pkgs/development/ocaml-modules/cairo2/default.nix
+++ b/pkgs/development/ocaml-modules/cairo2/default.nix
@@ -14,9 +14,9 @@ buildDunePackage rec {
   useDune2 = true;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ cairo dune-configurator ] ++ lib.optionals stdenv.isDarwin [ ApplicationServices ];
+  buildInputs = [ cairo dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ ApplicationServices ];
 
-  doCheck = !(stdenv.isDarwin
+  doCheck = !(stdenv.hostPlatform.isDarwin
   # https://github.com/Chris00/ocaml-cairo/issues/19
   || lib.versionAtLeast ocaml.version "4.10");
 
diff --git a/pkgs/development/ocaml-modules/camomile/default.nix b/pkgs/development/ocaml-modules/camomile/default.nix
index e4856062adb1..94e858ff9fb4 100644
--- a/pkgs/development/ocaml-modules/camomile/default.nix
+++ b/pkgs/development/ocaml-modules/camomile/default.nix
@@ -36,7 +36,7 @@ let params =
         hash = "sha256-HklX+VPD0Ta3Knv++dBT2rhsDSlDRH90k4Cj1YtWIa8=";
       };
 
-      nativeBuildInputs = lib.optional stdenv.isDarwin darwin.sigtool;
+      nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.sigtool;
 
       propagatedBuildInputs = [ camlp-streams dune-site ];
     };
diff --git a/pkgs/development/ocaml-modules/cpu/default.nix b/pkgs/development/ocaml-modules/cpu/default.nix
index a61a597b2093..ee16765c1bcf 100644
--- a/pkgs/development/ocaml-modules/cpu/default.nix
+++ b/pkgs/development/ocaml-modules/cpu/default.nix
@@ -20,7 +20,7 @@ buildDunePackage rec {
 
   nativeBuildInputs = [ autoconf ];
 
-  hardeningDisable = lib.optional stdenv.isDarwin "strictoverflow";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isDarwin "strictoverflow";
 
   meta = with lib; {
     inherit (src.meta) homepage;
diff --git a/pkgs/development/ocaml-modules/crowbar/default.nix b/pkgs/development/ocaml-modules/crowbar/default.nix
index d321abfe9daa..24ef96f57331 100644
--- a/pkgs/development/ocaml-modules/crowbar/default.nix
+++ b/pkgs/development/ocaml-modules/crowbar/default.nix
@@ -20,7 +20,7 @@ buildDunePackage rec {
   propagatedBuildInputs = [ ocplib-endian cmdliner afl-persistent ];
   checkInputs = [ calendar fpath pprint uutf uunf uucp ];
   # uunf is broken on aarch64
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   meta = with lib; {
     description = "Property fuzzing for OCaml";
diff --git a/pkgs/development/ocaml-modules/ctypes_stubs_js/default.nix b/pkgs/development/ocaml-modules/ctypes_stubs_js/default.nix
index f0d5e04a4a99..171b08482940 100644
--- a/pkgs/development/ocaml-modules/ctypes_stubs_js/default.nix
+++ b/pkgs/development/ocaml-modules/ctypes_stubs_js/default.nix
@@ -28,7 +28,7 @@ buildDunePackage rec {
     ctypes
     ppx_expect
   ];
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   meta = {
     description = "Js_of_ocaml Javascript stubs for the OCaml ctypes library";
diff --git a/pkgs/development/ocaml-modules/curly/default.nix b/pkgs/development/ocaml-modules/curly/default.nix
index 5d5cdb360f47..229ad666cb24 100644
--- a/pkgs/development/ocaml-modules/curly/default.nix
+++ b/pkgs/development/ocaml-modules/curly/default.nix
@@ -23,7 +23,7 @@ buildDunePackage rec {
   doCheck = lib.versionAtLeast ocaml.version "4.08"
     # Some test fails in macOS sandbox
     # > Fatal error: exception Unix.Unix_error(Unix.EPERM, "bind", "")
-    && !stdenv.isDarwin;
+    && !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     substituteInPlace src/curly.ml \
diff --git a/pkgs/development/ocaml-modules/eigen/default.nix b/pkgs/development/ocaml-modules/eigen/default.nix
index 5c75c4cb1044..0b02539d64cb 100644
--- a/pkgs/development/ocaml-modules/eigen/default.nix
+++ b/pkgs/development/ocaml-modules/eigen/default.nix
@@ -15,7 +15,7 @@ buildDunePackage rec {
 
   minimalOCamlVersion = "4.02";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   propagatedBuildInputs = [ ctypes ];
 
diff --git a/pkgs/development/ocaml-modules/eio/main.nix b/pkgs/development/ocaml-modules/eio/main.nix
index a65b27b8db41..48c15e99ae0c 100644
--- a/pkgs/development/ocaml-modules/eio/main.nix
+++ b/pkgs/development/ocaml-modules/eio/main.nix
@@ -16,7 +16,7 @@ buildDunePackage {
 
   propagatedBuildInputs = [
     eio_posix
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     eio_linux
   ];
 }
diff --git a/pkgs/development/ocaml-modules/eio/posix.nix b/pkgs/development/ocaml-modules/eio/posix.nix
index c18cdd506141..fa63c1ea713b 100644
--- a/pkgs/development/ocaml-modules/eio/posix.nix
+++ b/pkgs/development/ocaml-modules/eio/posix.nix
@@ -16,7 +16,7 @@ buildDunePackage {
 
   dontStrip = true;
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration";
   };
 
diff --git a/pkgs/development/ocaml-modules/elina/default.nix b/pkgs/development/ocaml-modules/elina/default.nix
index de000f8aaf83..de3f1094143d 100644
--- a/pkgs/development/ocaml-modules/elina/default.nix
+++ b/pkgs/development/ocaml-modules/elina/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     "--use-opam"
     "--apron-prefix" apron
   ]
-  ++ lib.optional stdenv.isDarwin "--absolute-dylibs"
+  ++ lib.optional stdenv.hostPlatform.isDarwin "--absolute-dylibs"
   ;
 
   createFindlibDestdir = true;
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-av.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-av.nix
index 58055aa6698c..4d8555613177 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-av.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-av.nix
@@ -14,7 +14,7 @@ buildDunePackage {
   inherit (ffmpeg-base) version src;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.isDarwin [ AudioToolbox VideoToolbox ];
+  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioToolbox VideoToolbox ];
   propagatedBuildInputs = [ ffmpeg-avutil ffmpeg-avcodec ffmpeg.dev ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avcodec.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avcodec.nix
index 8f268d4d5ec2..85f03825cdbd 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avcodec.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avcodec.nix
@@ -15,7 +15,7 @@ buildDunePackage {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ dune-configurator ]
-    ++ lib.optionals stdenv.isDarwin [ AudioToolbox VideoToolbox ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioToolbox VideoToolbox ];
   propagatedBuildInputs = [ ffmpeg-avutil ffmpeg.dev ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avdevice.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avdevice.nix
index c8a1bf9de5a1..f966706cc737 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avdevice.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avdevice.nix
@@ -21,7 +21,7 @@ buildDunePackage {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ dune-configurator ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     AudioToolbox
     AVFoundation
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avfilter.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avfilter.nix
index 89d982483986..1f9ded9bd024 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avfilter.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avfilter.nix
@@ -17,7 +17,7 @@ buildDunePackage {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ dune-configurator ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit CoreImage OpenGL VideoToolbox ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit CoreImage OpenGL VideoToolbox ];
   propagatedBuildInputs = [ ffmpeg-avutil ffmpeg.dev ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avutil.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avutil.nix
index 8e299a536f63..8374304fe488 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avutil.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-avutil.nix
@@ -12,7 +12,7 @@ buildDunePackage {
   inherit (ffmpeg-base) version src;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.isDarwin [ AudioToolbox VideoToolbox ];
+  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioToolbox VideoToolbox ];
   propagatedBuildInputs = [ ffmpeg.dev ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swresample.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swresample.nix
index d21e0d02ad4c..5fda062454f0 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swresample.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swresample.nix
@@ -13,7 +13,7 @@ buildDunePackage {
   inherit (ffmpeg-base) version src;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.isDarwin [ VideoToolbox ];
+  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ VideoToolbox ];
   propagatedBuildInputs = [ ffmpeg-avutil ffmpeg-avcodec ffmpeg.dev ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swscale.nix b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swscale.nix
index b03d87596b03..518f18b1509b 100644
--- a/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swscale.nix
+++ b/pkgs/development/ocaml-modules/ffmpeg/ffmpeg-swscale.nix
@@ -13,7 +13,7 @@ buildDunePackage {
   inherit (ffmpeg-base) version src;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.isDarwin [ VideoToolbox ];
+  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ VideoToolbox ];
   propagatedBuildInputs = [ ffmpeg-avutil ffmpeg.dev ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/git/default.nix b/pkgs/development/ocaml-modules/git/default.nix
index 980a3efa9bd0..29d7b492c837 100644
--- a/pkgs/development/ocaml-modules/git/default.nix
+++ b/pkgs/development/ocaml-modules/git/default.nix
@@ -31,7 +31,7 @@ buildDunePackage rec {
   checkInputs = [
     alcotest alcotest-lwt mirage-crypto-rng crowbar cmdliner
   ];
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   meta = {
     description = "Git format and protocol in pure OCaml";
diff --git a/pkgs/development/ocaml-modules/gsl/default.nix b/pkgs/development/ocaml-modules/gsl/default.nix
index 27791d6aa5f3..fc81d53f1717 100644
--- a/pkgs/development/ocaml-modules/gsl/default.nix
+++ b/pkgs/development/ocaml-modules/gsl/default.nix
@@ -15,7 +15,7 @@ buildDunePackage rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ dune-configurator gsl ];
-  propagatedBuildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Accelerate ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Accelerate ];
 
   meta = with lib; {
     homepage = "https://mmottl.github.io/gsl-ocaml/";
diff --git a/pkgs/development/ocaml-modules/gstreamer/default.nix b/pkgs/development/ocaml-modules/gstreamer/default.nix
index 34407299914a..689603c8e19c 100644
--- a/pkgs/development/ocaml-modules/gstreamer/default.nix
+++ b/pkgs/development/ocaml-modules/gstreamer/default.nix
@@ -12,7 +12,7 @@ buildDunePackage rec {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.isDarwin [ AppKit Foundation ];
+  buildInputs = [ dune-configurator ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit Foundation ];
   propagatedBuildInputs = [ glib.dev gst_all_1.gstreamer.dev gst_all_1.gst-plugins-base ];
 
   CFLAGS_COMPILE = [
diff --git a/pkgs/development/ocaml-modules/labltk/default.nix b/pkgs/development/ocaml-modules/labltk/default.nix
index 1fb45ebdd8df..780213ad0792 100644
--- a/pkgs/development/ocaml-modules/labltk/default.nix
+++ b/pkgs/development/ocaml-modules/labltk/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
   strictDeps = true;
 
   nativeBuildInputs = [ ocaml findlib makeWrapper ];
-  buildInputs = [ tcl tk ] ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+  buildInputs = [ tcl tk ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   configureFlags = [ "--use-findlib" "--installbindir" "$(out)/bin" ];
   dontAddPrefix = true;
diff --git a/pkgs/development/ocaml-modules/lacaml/default.nix b/pkgs/development/ocaml-modules/lacaml/default.nix
index e8d0e966c40f..e747b64de6e2 100644
--- a/pkgs/development/ocaml-modules/lacaml/default.nix
+++ b/pkgs/development/ocaml-modules/lacaml/default.nix
@@ -19,7 +19,7 @@ buildDunePackage rec {
 
   buildInputs = [ dune-configurator ];
   propagatedBuildInputs = [ lapack blas ] ++
-    lib.optionals stdenv.isDarwin
+    lib.optionals stdenv.hostPlatform.isDarwin
       [ darwin.apple_sdk.frameworks.Accelerate ];
 
   meta = with lib; {
diff --git a/pkgs/development/ocaml-modules/ocaml-libvirt/default.nix b/pkgs/development/ocaml-modules/ocaml-libvirt/default.nix
index 67741516af19..e27fbca0a4a0 100644
--- a/pkgs/development/ocaml-modules/ocaml-libvirt/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-libvirt/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config findlib perl ocaml ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
     AppKit
   ];
diff --git a/pkgs/development/ocaml-modules/sodium/default.nix b/pkgs/development/ocaml-modules/sodium/default.nix
index 87fb82adcbeb..a3777f7d8aec 100644
--- a/pkgs/development/ocaml-modules/sodium/default.nix
+++ b/pkgs/development/ocaml-modules/sodium/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   createFindlibDestdir = true;
 
-  hardeningDisable = lib.optional stdenv.isDarwin "strictoverflow";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isDarwin "strictoverflow";
 
   meta = with lib; {
     homepage = "https://github.com/dsheets/ocaml-sodium";
diff --git a/pkgs/development/ocaml-modules/torch/default.nix b/pkgs/development/ocaml-modules/torch/default.nix
index f24a4fe96819..83446cdf0e17 100644
--- a/pkgs/development/ocaml-modules/torch/default.nix
+++ b/pkgs/development/ocaml-modules/torch/default.nix
@@ -57,7 +57,7 @@ buildDunePackage rec {
 
   preBuild = "export LIBTORCH=${torch.dev}/";
 
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   meta = with lib; {
     inherit (src.meta) homepage;
diff --git a/pkgs/development/ocaml-modules/tsdl/default.nix b/pkgs/development/ocaml-modules/tsdl/default.nix
index 2d35f76d5bf0..1395a37c69d3 100644
--- a/pkgs/development/ocaml-modules/tsdl/default.nix
+++ b/pkgs/development/ocaml-modules/tsdl/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ pkg-config ocaml findlib ocamlbuild topkg ];
   buildInputs = [ topkg ];
   propagatedBuildInputs = [ SDL2 ctypes ctypes-foreign ]
-    ++ lib.optionals stdenv.isDarwin [ AudioToolbox Cocoa CoreAudio CoreVideo ForceFeedback ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioToolbox Cocoa CoreAudio CoreVideo ForceFeedback ];
 
   preConfigure = ''
     # The following is done to avoid an additional dependency (ncurses)
diff --git a/pkgs/development/ocaml-modules/uunf/default.nix b/pkgs/development/ocaml-modules/uunf/default.nix
index 2d473a4b8351..e001fa03a2dd 100644
--- a/pkgs/development/ocaml-modules/uunf/default.nix
+++ b/pkgs/development/ocaml-modules/uunf/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
 
   strictDeps = true;
 
-  prePatch = lib.optionalString stdenv.isAarch64 "ulimit -s 16384";
+  prePatch = lib.optionalString stdenv.hostPlatform.isAarch64 "ulimit -s 16384";
 
   buildPhase = ''
     runHook preBuild
diff --git a/pkgs/development/ocaml-modules/zelus/default.nix b/pkgs/development/ocaml-modules/zelus/default.nix
index 07d268d45de9..4d52640d53bc 100644
--- a/pkgs/development/ocaml-modules/zelus/default.nix
+++ b/pkgs/development/ocaml-modules/zelus/default.nix
@@ -20,7 +20,7 @@ buildDunePackage rec {
   };
 
   # ./configure: cannot execute: required file not found
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchShebangs configure
   '';
 
diff --git a/pkgs/development/octave-modules/gsl/default.nix b/pkgs/development/octave-modules/gsl/default.nix
index e050f381a914..2ce92f43d618 100644
--- a/pkgs/development/octave-modules/gsl/default.nix
+++ b/pkgs/development/octave-modules/gsl/default.nix
@@ -25,6 +25,6 @@ buildOctavePackage rec {
     description = "Octave bindings to the GNU Scientific Library";
     # error: use of undeclared identifier 'feval'; did you mean 'octave::feval'?
     # error: no member named 'is_real_type' in 'octave_value'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/octave-modules/ocl/default.nix b/pkgs/development/octave-modules/ocl/default.nix
index eb20f7dc7c77..72242d165543 100644
--- a/pkgs/development/octave-modules/ocl/default.nix
+++ b/pkgs/development/octave-modules/ocl/default.nix
@@ -24,6 +24,6 @@ buildOctavePackage rec {
        using available OpenCL hardware and drivers.
     '';
     # error: structure has no member 'dir'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/octave-modules/strings/default.nix b/pkgs/development/octave-modules/strings/default.nix
index 35887d249576..fbf7aec786af 100644
--- a/pkgs/development/octave-modules/strings/default.nix
+++ b/pkgs/development/octave-modules/strings/default.nix
@@ -40,6 +40,6 @@ buildOctavePackage rec {
     maintainers = with maintainers; [ KarlJoad ];
     description = "Additional functions for manipulation and analysis of strings";
     # Some pcre symbols claimed to be missing
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/perl-modules/ImageExifTool/default.nix b/pkgs/development/perl-modules/ImageExifTool/default.nix
index 08d207e3bbac..46efb33f23ca 100644
--- a/pkgs/development/perl-modules/ImageExifTool/default.nix
+++ b/pkgs/development/perl-modules/ImageExifTool/default.nix
@@ -18,9 +18,9 @@ buildPerlPackage rec {
     hash = "sha256-sfSnx5bS7vI0KIhBOpB5VYzP6g8oi0rR7mUTxxNWEA0=";
   };
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/exiftool
   '';
 
diff --git a/pkgs/development/perl-modules/WWW-YoutubeViewer/default.nix b/pkgs/development/perl-modules/WWW-YoutubeViewer/default.nix
index cba9ef986362..0669f5b7c7af 100644
--- a/pkgs/development/perl-modules/WWW-YoutubeViewer/default.nix
+++ b/pkgs/development/perl-modules/WWW-YoutubeViewer/default.nix
@@ -22,14 +22,14 @@ buildPerlPackage rec {
     sha256 = "9Z4fv2B0AnwtYsp7h9phnRMmHtBOMObIJvK8DmKQRxs=";
   };
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
   propagatedBuildInputs = [
     LWP
     LWPProtocolHttps
     DataDump
     JSON
   ];
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/youtube-viewer
   '';
 
diff --git a/pkgs/development/perl-modules/strip-nondeterminism/default.nix b/pkgs/development/perl-modules/strip-nondeterminism/default.nix
index e50d61b87898..fe6328ea3946 100644
--- a/pkgs/development/perl-modules/strip-nondeterminism/default.nix
+++ b/pkgs/development/perl-modules/strip-nondeterminism/default.nix
@@ -24,7 +24,7 @@ buildPerlPackage rec {
   };
 
   strictDeps = true;
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ shortenPerlShebang ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ shortenPerlShebang ];
   buildInputs = [
     ArchiveZip
     ArchiveCpio
@@ -45,7 +45,7 @@ buildPerlPackage rec {
     # we don’t need the debhelper script
     rm $out/bin/dh_strip_nondeterminism
     rm $out/share/man/man1/dh_strip_nondeterminism.1
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/strip-nondeterminism
   '';
 
@@ -56,7 +56,7 @@ buildPerlPackage rec {
   '';
 
   # running shortenPerlShebang in postBuild results in non-functioning binary 'exec format error'
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   doInstallCheck = true;
 
   meta = with lib; {
diff --git a/pkgs/development/php-packages/datadog_trace/default.nix b/pkgs/development/php-packages/datadog_trace/default.nix
index 15b16582435d..3cc5732adca7 100644
--- a/pkgs/development/php-packages/datadog_trace/default.nix
+++ b/pkgs/development/php-packages/datadog_trace/default.nix
@@ -38,11 +38,11 @@ buildPecl rec {
       cargo
       rustc
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       rustPlatform.bindgenHook
       rustPlatform.cargoSetupHook
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.rustPlatform.bindgenHook
       darwin.apple_sdk_11_0.rustPlatform.cargoSetupHook
     ];
@@ -52,7 +52,7 @@ buildPecl rec {
       curl
       pcre2
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.Security
       libiconv
diff --git a/pkgs/development/php-packages/mongodb/default.nix b/pkgs/development/php-packages/mongodb/default.nix
index 03487e15dbb3..cde9fec66d51 100644
--- a/pkgs/development/php-packages/mongodb/default.nix
+++ b/pkgs/development/php-packages/mongodb/default.nix
@@ -36,7 +36,7 @@ buildPecl rec {
       zlib
       pcre2
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.Security
       darwin.apple_sdk_11_0.Libsystem
       libiconv
diff --git a/pkgs/development/php-packages/openswoole/default.nix b/pkgs/development/php-packages/openswoole/default.nix
index 83c59fb3212c..b250db4a3003 100644
--- a/pkgs/development/php-packages/openswoole/default.nix
+++ b/pkgs/development/php-packages/openswoole/default.nix
@@ -21,7 +21,7 @@ buildPecl {
     hash = "sha256-Z26E1PdKypB/MImCHFgA3rJW5LvVaLZsQUxRv0RcFuo=";
   };
 
-  buildInputs = [ pcre2 ] ++ lib.optionals (!stdenv.isDarwin) [ valgrind ];
+  buildInputs = [ pcre2 ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ valgrind ];
 
   meta = with lib; {
     changelog = "https://github.com/openswoole/swoole-src/releases/tag/v${version}";
diff --git a/pkgs/development/php-packages/pdo_sqlsrv/default.nix b/pkgs/development/php-packages/pdo_sqlsrv/default.nix
index 7da343ac5564..1b61f74d4094 100644
--- a/pkgs/development/php-packages/pdo_sqlsrv/default.nix
+++ b/pkgs/development/php-packages/pdo_sqlsrv/default.nix
@@ -15,7 +15,7 @@ buildPecl {
 
   internalDeps = [ php.extensions.pdo ];
 
-  buildInputs = [ unixODBC ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ unixODBC ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   meta = with lib; {
     description = "Microsoft Drivers for PHP for SQL Server";
diff --git a/pkgs/development/php-packages/relay/default.nix b/pkgs/development/php-packages/relay/default.nix
index 56d826cb4b94..4a3f21a08a90 100644
--- a/pkgs/development/php-packages/relay/default.nix
+++ b/pkgs/development/php-packages/relay/default.nix
@@ -77,8 +77,8 @@ stdenv.mkDerivation (finalAttrs: {
     system = stdenv.hostPlatform.system;
     phpMajor = lib.versions.majorMinor php.version;
   };
-  nativeBuildInputs = lib.optionals (!stdenv.isDarwin) [ autoPatchelfHook ];
-  buildInputs = lib.optionals (!stdenv.isDarwin) [
+  nativeBuildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ autoPatchelfHook ];
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     openssl
     zstd
     lz4
@@ -92,7 +92,7 @@ stdenv.mkDerivation (finalAttrs: {
       chmod +w $out/lib/php/extensions/relay.so
     ''
     + (
-      if stdenv.isDarwin then
+      if stdenv.hostPlatform.isDarwin then
         let
           args =
             lib.strings.concatMapStrings
diff --git a/pkgs/development/php-packages/snuffleupagus/default.nix b/pkgs/development/php-packages/snuffleupagus/default.nix
index d9c201e67a2d..8a2e5a45f7f1 100644
--- a/pkgs/development/php-packages/snuffleupagus/default.nix
+++ b/pkgs/development/php-packages/snuffleupagus/default.nix
@@ -22,7 +22,7 @@ buildPecl rec {
 
   buildInputs =
     [ pcre2 ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk_11_0.frameworks.CoreFoundation
       darwin.apple_sdk_11_0.Libsystem
       libiconv
diff --git a/pkgs/development/php-packages/sqlsrv/default.nix b/pkgs/development/php-packages/sqlsrv/default.nix
index 303f2327d1e5..08c59275c848 100644
--- a/pkgs/development/php-packages/sqlsrv/default.nix
+++ b/pkgs/development/php-packages/sqlsrv/default.nix
@@ -12,7 +12,7 @@ buildPecl {
   version = "5.10.1";
   sha256 = "sha256-XNrttNiihjQ+azuZmS2fy0So+2ndAqpde8IOsupeWdI=";
 
-  buildInputs = [ unixODBC ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ unixODBC ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   meta = with lib; {
     description = "Microsoft Drivers for PHP for SQL Server";
diff --git a/pkgs/development/php-packages/swoole/default.nix b/pkgs/development/php-packages/swoole/default.nix
index f519522a8357..6cc399be10dc 100644
--- a/pkgs/development/php-packages/swoole/default.nix
+++ b/pkgs/development/php-packages/swoole/default.nix
@@ -22,7 +22,7 @@ buildPecl {
     hash = "sha256-WTsntvauiooj081mOoFcK6CVpnCCR/cEQtJbsOIJ/wo=";
   };
 
-  buildInputs = [ pcre2 ] ++ lib.optionals (!stdenv.isDarwin) [ valgrind ];
+  buildInputs = [ pcre2 ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ valgrind ];
 
   # tests require internet access
   doCheck = false;
diff --git a/pkgs/development/python-modules/aardwolf/default.nix b/pkgs/development/python-modules/aardwolf/default.nix
index 72d309cd3298..c4807df9a90c 100644
--- a/pkgs/development/python-modules/aardwolf/default.nix
+++ b/pkgs/development/python-modules/aardwolf/default.nix
@@ -66,7 +66,7 @@ buildPythonPackage rec {
     tqdm
     unicrypto
     winsspi
-  ] ++ lib.optionals (stdenv.isDarwin) [ iconv ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ iconv ];
 
   # Module doesn't have tests
   doCheck = false;
diff --git a/pkgs/development/python-modules/accelerate/default.nix b/pkgs/development/python-modules/accelerate/default.nix
index 566908cfa3b5..a809c48b7313 100644
--- a/pkgs/development/python-modules/accelerate/default.nix
+++ b/pkgs/development/python-modules/accelerate/default.nix
@@ -96,7 +96,7 @@ buildPythonPackage rec {
       "test_dynamo_extract_model"
       "test_send_to_device_compiles"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # usual aarch64-linux RuntimeError: DataLoader worker (pid(s) <...>) exited unexpectedly
       "CheckpointTest"
       # TypeError: unsupported operand type(s) for /: 'NoneType' and 'int' (it seems cpuinfo doesn't work here)
@@ -106,7 +106,7 @@ buildPythonPackage rec {
       # requires ptxas from cudatoolkit, which is unfree
       "test_dynamo_extract_model"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # RuntimeError: 'accelerate-launch /nix/store/a7vhm7b74a7bmxc35j26s9iy1zfaqjs...
       "test_accelerate_test"
       "test_init_trackers"
@@ -114,12 +114,12 @@ buildPythonPackage rec {
       "test_log"
       "test_log_with_tensor"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       # RuntimeError: torch_shm_manager: execl failed: Permission denied
       "CheckpointTest"
     ];
 
-  disabledTestPaths = lib.optionals (!(stdenv.isLinux && stdenv.isx86_64)) [
+  disabledTestPaths = lib.optionals (!(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64)) [
     # numerous instances of torch.multiprocessing.spawn.ProcessRaisedException:
     "tests/test_cpu.py"
     "tests/test_grad_sync.py"
diff --git a/pkgs/development/python-modules/accupy/default.nix b/pkgs/development/python-modules/accupy/default.nix
index f8f9897a6b3a..35d39fed9a6f 100644
--- a/pkgs/development/python-modules/accupy/default.nix
+++ b/pkgs/development/python-modules/accupy/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
 
   # This variable is needed to suppress the "Trace/BPT trap: 5" error in Darwin's checkPhase.
   # Not sure of the details, but we can avoid it by changing the matplotlib backend during testing.
-  env.MPLBACKEND = lib.optionalString stdenv.isDarwin "Agg";
+  env.MPLBACKEND = lib.optionalString stdenv.hostPlatform.isDarwin "Agg";
 
   # performance tests aren't useful to us and disabling them allows us to
   # decouple ourselves from an unnecessary build dep
diff --git a/pkgs/development/python-modules/adblock/default.nix b/pkgs/development/python-modules/adblock/default.nix
index 7faeab491f62..67170159f348 100644
--- a/pkgs/development/python-modules/adblock/default.nix
+++ b/pkgs/development/python-modules/adblock/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       CoreFoundation
       Security
diff --git a/pkgs/development/python-modules/aesara/default.nix b/pkgs/development/python-modules/aesara/default.nix
index a7e5ee143667..385ec7ed5259 100644
--- a/pkgs/development/python-modules/aesara/default.nix
+++ b/pkgs/development/python-modules/aesara/default.nix
@@ -108,6 +108,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/aesara-devs/aesara/releases/tag/rel-${version}";
     license = licenses.bsd3;
     maintainers = with maintainers; [ Etjean ];
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/python-modules/aiofiles/default.nix b/pkgs/development/python-modules/aiofiles/default.nix
index dd9e903a4369..a80581bc3088 100644
--- a/pkgs/development/python-modules/aiofiles/default.nix
+++ b/pkgs/development/python-modules/aiofiles/default.nix
@@ -30,7 +30,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "test_sendfile_file"
 
     # require loopback networking:
diff --git a/pkgs/development/python-modules/aioftp/default.nix b/pkgs/development/python-modules/aioftp/default.nix
index bd448f41c849..ee0429bacb46 100644
--- a/pkgs/development/python-modules/aioftp/default.nix
+++ b/pkgs/development/python-modules/aioftp/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
     trustme
   ] ++ lib.flatten (builtins.attrValues passthru.optional-dependencies);
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # uses 127.0.0.2, which macos doesn't like
     "test_pasv_connection_pasv_forced_response_address"
   ];
diff --git a/pkgs/development/python-modules/aiohttp/default.nix b/pkgs/development/python-modules/aiohttp/default.nix
index 75db6b645291..576ea16a39f8 100644
--- a/pkgs/development/python-modules/aiohttp/default.nix
+++ b/pkgs/development/python-modules/aiohttp/default.nix
@@ -113,8 +113,8 @@ buildPythonPackage rec {
       # don't run benchmarks
       "test_import_time"
     ]
-    ++ lib.optionals stdenv.is32bit [ "test_cookiejar" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.is32bit [ "test_cookiejar" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_addresses" # https://github.com/aio-libs/aiohttp/issues/3572, remove >= v4.0.0
       "test_close"
     ];
@@ -129,7 +129,7 @@ buildPythonPackage rec {
 
       export HOME=$(mktemp -d)
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Work around "OSError: AF_UNIX path too long"
       export TMPDIR="/tmp"
     '';
diff --git a/pkgs/development/python-modules/aiomisc/default.nix b/pkgs/development/python-modules/aiomisc/default.nix
index 8f3050f3ed48..59412173e977 100644
--- a/pkgs/development/python-modules/aiomisc/default.nix
+++ b/pkgs/development/python-modules/aiomisc/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
   dependencies =
     [ colorlog ]
     ++ lib.optionals (pythonOlder "3.11") [ typing-extensions ]
-    ++ lib.optionals stdenv.isLinux [ logging-journald ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ logging-journald ];
 
   nativeCheckInputs = [
     aiocontextvars
diff --git a/pkgs/development/python-modules/aiosonic/default.nix b/pkgs/development/python-modules/aiosonic/default.nix
index e4dd72e700cd..b5f4e5406b8b 100644
--- a/pkgs/development/python-modules/aiosonic/default.nix
+++ b/pkgs/development/python-modules/aiosonic/default.nix
@@ -90,7 +90,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "aiosonic" ];
 
   disabledTests =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       # need network
       "test_simple_get"
       "test_get_python"
@@ -132,7 +132,7 @@ buildPythonPackage rec {
       "test_get_with_cookies"
       "test_proxy_request"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # "FAILED tests/test_proxy.py::test_proxy_request - Exception: port 8865 never got active"
       "test_proxy_request"
     ];
diff --git a/pkgs/development/python-modules/ale-py/default.nix b/pkgs/development/python-modules/ale-py/default.nix
index 15836dee89ba..031813101079 100644
--- a/pkgs/development/python-modules/ale-py/default.nix
+++ b/pkgs/development/python-modules/ale-py/default.nix
@@ -87,6 +87,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/Farama-Foundation/Arcade-Learning-Environment/releases/tag/v${version}";
     license = lib.licenses.gpl2;
     maintainers = with lib.maintainers; [ billhuang ];
-    broken = stdenv.isDarwin; # fails to link with missing library
+    broken = stdenv.hostPlatform.isDarwin; # fails to link with missing library
   };
 }
diff --git a/pkgs/development/python-modules/angr/default.nix b/pkgs/development/python-modules/angr/default.nix
index f9039ea24a8e..b1b14da3b607 100644
--- a/pkgs/development/python-modules/angr/default.nix
+++ b/pkgs/development/python-modules/angr/default.nix
@@ -88,7 +88,7 @@ buildPythonPackage rec {
     AngrDB = [ sqlalchemy ];
   };
 
-  setupPyBuildFlags = lib.optionals stdenv.isLinux [
+  setupPyBuildFlags = lib.optionals stdenv.hostPlatform.isLinux [
     "--plat-name"
     "linux"
   ];
diff --git a/pkgs/development/python-modules/ansible-runner/default.nix b/pkgs/development/python-modules/ansible-runner/default.nix
index 0e1a3b8ca7a2..11d0f37773e4 100644
--- a/pkgs/development/python-modules/ansible-runner/default.nix
+++ b/pkgs/development/python-modules/ansible-runner/default.nix
@@ -89,7 +89,7 @@ buildPythonPackage rec {
       "test/integration/test_runner.py"
       "test/unit/test_runner.py"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Integration tests on Darwin are not regularly passing in ansible-runner's own CI
       "test/integration"
       # These tests write to `/tmp` which is not writable on Darwin
diff --git a/pkgs/development/python-modules/anyio/default.nix b/pkgs/development/python-modules/anyio/default.nix
index 296fbcdc3563..23f249bfcad2 100644
--- a/pkgs/development/python-modules/anyio/default.nix
+++ b/pkgs/development/python-modules/anyio/default.nix
@@ -78,7 +78,7 @@ buildPythonPackage rec {
     "'not network'"
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # PermissionError: [Errno 1] Operation not permitted: '/dev/console'
     "test_is_block_device"
   ];
diff --git a/pkgs/development/python-modules/apscheduler/default.nix b/pkgs/development/python-modules/apscheduler/default.nix
index d409a535b463..7005690b53ef 100644
--- a/pkgs/development/python-modules/apscheduler/default.nix
+++ b/pkgs/development/python-modules/apscheduler/default.nix
@@ -64,7 +64,7 @@ buildPythonPackage rec {
       "test_add_pending_job"
       "test_shutdown"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_submit_job"
       "test_max_instances"
     ];
diff --git a/pkgs/development/python-modules/apsw/default.nix b/pkgs/development/python-modules/apsw/default.nix
index aec388af308a..d2effb1ae435 100644
--- a/pkgs/development/python-modules/apsw/default.nix
+++ b/pkgs/development/python-modules/apsw/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
     "testVFSWithWAL"
     # no lines in errout.txt
     "testWriteUnraisable"
-  ] ++ lib.optionals stdenv.isDarwin [ "testzzForkChecker" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "testzzForkChecker" ];
 
   pythonImportsCheck = [ "apsw" ];
 
diff --git a/pkgs/development/python-modules/ase/default.nix b/pkgs/development/python-modules/ase/default.nix
index 326d51f55a64..dbdcbce06753 100644
--- a/pkgs/development/python-modules/ase/default.nix
+++ b/pkgs/development/python-modules/ase/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
     flask
     pillow
     psycopg2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     tkinter
   ];
 
diff --git a/pkgs/development/python-modules/asgiref/default.nix b/pkgs/development/python-modules/asgiref/default.nix
index fecc4b98f490..1fdb7f50ae31 100644
--- a/pkgs/development/python-modules/asgiref/default.nix
+++ b/pkgs/development/python-modules/asgiref/default.nix
@@ -30,7 +30,7 @@ buildPythonPackage rec {
     pytest-asyncio
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [ "test_multiprocessing" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "test_multiprocessing" ];
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/aspy-refactor-imports/default.nix b/pkgs/development/python-modules/aspy-refactor-imports/default.nix
index bcfb80b32e81..dbc97cca6efb 100644
--- a/pkgs/development/python-modules/aspy-refactor-imports/default.nix
+++ b/pkgs/development/python-modules/aspy-refactor-imports/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ pytestCheckHook ];
 
   # fails on darwin due to case-insensitive file system
-  disabledTests = lib.optionals stdenv.isDarwin [ "test_application_directory_case" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "test_application_directory_case" ];
 
   meta = with lib; {
     description = "Utilities for refactoring imports in python-like syntax";
diff --git a/pkgs/development/python-modules/astropy/default.nix b/pkgs/development/python-modules/astropy/default.nix
index c88029cb09a8..c6a7f9fea08b 100644
--- a/pkgs/development/python-modules/astropy/default.nix
+++ b/pkgs/development/python-modules/astropy/default.nix
@@ -99,7 +99,7 @@ buildPythonPackage rec {
     "test_datetime_to_timedelta"
 
     "test_datetime_difference_agrees_with_timedelta_no_hypothesis"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_sidereal_lat_independent" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_sidereal_lat_independent" ];
 
   meta = {
     description = "Astronomy/Astrophysics library for Python";
diff --git a/pkgs/development/python-modules/async-upnp-client/default.nix b/pkgs/development/python-modules/async-upnp-client/default.nix
index 18969f48233d..d1719497d7ba 100644
--- a/pkgs/development/python-modules/async-upnp-client/default.nix
+++ b/pkgs/development/python-modules/async-upnp-client/default.nix
@@ -57,7 +57,7 @@ buildPythonPackage rec {
     # socket.gaierror: [Errno -2] Name or service not known
     "test_async_get_local_ip"
     "test_get_local_ip"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_deferred_callback_url" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_deferred_callback_url" ];
 
   disabledTestPaths = [
     # Tries to bind to multicast socket and fails to find proper interface
diff --git a/pkgs/development/python-modules/asyncio-dgram/default.nix b/pkgs/development/python-modules/asyncio-dgram/default.nix
index cdd6ac9b9781..5608a8632e47 100644
--- a/pkgs/development/python-modules/asyncio-dgram/default.nix
+++ b/pkgs/development/python-modules/asyncio-dgram/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
   ];
 
   # OSError: AF_UNIX path too long
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTests = [
     "test_protocol_pause_resume"
diff --git a/pkgs/development/python-modules/asyncua/default.nix b/pkgs/development/python-modules/asyncua/default.nix
index d095b203d72f..59c42fd02838 100644
--- a/pkgs/development/python-modules/asyncua/default.nix
+++ b/pkgs/development/python-modules/asyncua/default.nix
@@ -64,7 +64,7 @@ buildPythonPackage rec {
   disabledTests = [
     # Failed: DID NOT RAISE <class 'asyncio.exceptions.TimeoutError'>
     "test_publish"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # OSError: [Errno 48] error while attempting to bind on address ('127.0.0.1',...
     "test_anonymous_rejection"
     "test_certificate_handling_success"
diff --git a/pkgs/development/python-modules/aubio/default.nix b/pkgs/development/python-modules/aubio/default.nix
index 88d2d9af3434..64b89bb1897f 100644
--- a/pkgs/development/python-modules/aubio/default.nix
+++ b/pkgs/development/python-modules/aubio/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
     })
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks;
     [
       Accelerate
diff --git a/pkgs/development/python-modules/audiotools/default.nix b/pkgs/development/python-modules/audiotools/default.nix
index a6b485d7b2c9..b714062be313 100644
--- a/pkgs/development/python-modules/audiotools/default.nix
+++ b/pkgs/development/python-modules/audiotools/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   build-system = [ setuptools ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AudioToolbox
     AudioUnit
     CoreServices
diff --git a/pkgs/development/python-modules/av/default.nix b/pkgs/development/python-modules/av/default.nix
index a030344e8f4c..e3da4e6427cc 100644
--- a/pkgs/development/python-modules/av/default.nix
+++ b/pkgs/development/python-modules/av/default.nix
@@ -63,7 +63,7 @@ buildPythonPackage rec {
   ];
 
   # `__darwinAllowLocalNetworking` doesn’t work for these; not sure why.
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     "tests/test_timeout.py"
   ];
 
diff --git a/pkgs/development/python-modules/awkward/default.nix b/pkgs/development/python-modules/awkward/default.nix
index ffadf4d180ca..aefec7c8f326 100644
--- a/pkgs/development/python-modules/awkward/default.nix
+++ b/pkgs/development/python-modules/awkward/default.nix
@@ -72,7 +72,7 @@ buildPythonPackage rec {
       pytest-xdist
       pytestCheckHook
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       # no support for darwin
       jax
       jaxlib
@@ -82,7 +82,7 @@ buildPythonPackage rec {
   disabledTestPaths = [
     "tests-cuda"
     # Disable tests dependending on jax on darwin
-  ] ++ lib.optionals stdenv.isDarwin [ "tests/test_2603_custom_behaviors_with_jax.py" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "tests/test_2603_custom_behaviors_with_jax.py" ];
 
   disabledTests = [
     # AssertionError: Regex pattern did not match.
diff --git a/pkgs/development/python-modules/awscrt/default.nix b/pkgs/development/python-modules/awscrt/default.nix
index f856473c7b7d..08c902f13832 100644
--- a/pkgs/development/python-modules/awscrt/default.nix
+++ b/pkgs/development/python-modules/awscrt/default.nix
@@ -22,12 +22,12 @@ buildPythonPackage rec {
     hash = "sha256-fsKmevMPvzhklN8Au9+Zb3AkAA32sBqxYAFK/vK5EAU=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     Security
   ];
 
-  nativeBuildInputs = [ cmake ] ++ lib.optionals (!stdenv.isDarwin) [ perl ];
+  nativeBuildInputs = [ cmake ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ perl ];
 
   dontUseCmakeConfigure = true;
 
diff --git a/pkgs/development/python-modules/awslambdaric/default.nix b/pkgs/development/python-modules/awslambdaric/default.nix
index f208c5048767..8b091fc6dfe7 100644
--- a/pkgs/development/python-modules/awslambdaric/default.nix
+++ b/pkgs/development/python-modules/awslambdaric/default.nix
@@ -55,7 +55,7 @@ buildPythonPackage rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
     description = "AWS Lambda Runtime Interface Client for Python";
     homepage = "https://github.com/aws/aws-lambda-python-runtime-interface-client";
     license = licenses.asl20;
diff --git a/pkgs/development/python-modules/azure-core/default.nix b/pkgs/development/python-modules/azure-core/default.nix
index 67178fac58aa..a9cdf1ac4e99 100644
--- a/pkgs/development/python-modules/azure-core/default.nix
+++ b/pkgs/development/python-modules/azure-core/default.nix
@@ -75,7 +75,7 @@ buildPythonPackage rec {
     # disable 8 tests failing on some darwin machines with errors:
     # azure.core.polling.base_polling.BadStatus: Invalid return status 403 for 'GET' operation
     # azure.core.exceptions.HttpResponseError: Operation returned an invalid status 'Forbidden'
-  ] ++ lib.optionals stdenv.isDarwin [ "location_polling_fail" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "location_polling_fail" ];
 
   disabledTestPaths = [
     # requires testing modules which aren't published, and likely to create cyclic dependencies
diff --git a/pkgs/development/python-modules/b2sdk/default.nix b/pkgs/development/python-modules/b2sdk/default.nix
index 3bcca268dab3..7b56d75ddd03 100644
--- a/pkgs/development/python-modules/b2sdk/default.nix
+++ b/pkgs/development/python-modules/b2sdk/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
     pytest-mock
     pytestCheckHook
     tqdm
-  ] ++ lib.optionals stdenv.isLinux [ glibcLocales ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ glibcLocales ];
 
   disabledTestPaths = [
     # requires aws s3 auth
diff --git a/pkgs/development/python-modules/base2048/default.nix b/pkgs/development/python-modules/base2048/default.nix
index e092fecc1c1c..4a760c5b6f19 100644
--- a/pkgs/development/python-modules/base2048/default.nix
+++ b/pkgs/development/python-modules/base2048/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   passthru.optional-dependencies = {
     fuzz = [ frelatage ];
diff --git a/pkgs/development/python-modules/bayesian-optimization/default.nix b/pkgs/development/python-modules/bayesian-optimization/default.nix
index 24b86e8f224b..582a6d507e6d 100644
--- a/pkgs/development/python-modules/bayesian-optimization/default.nix
+++ b/pkgs/development/python-modules/bayesian-optimization/default.nix
@@ -50,7 +50,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "bayes_opt" ];
 
   meta = with lib; {
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
     description = ''
       A Python implementation of global optimization with gaussian processes
     '';
diff --git a/pkgs/development/python-modules/bcrypt/default.nix b/pkgs/development/python-modules/bcrypt/default.nix
index 396a9668b777..ee51533e6e3a 100644
--- a/pkgs/development/python-modules/bcrypt/default.nix
+++ b/pkgs/development/python-modules/bcrypt/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
   ];
 
   # Remove when https://github.com/NixOS/nixpkgs/pull/190093 lands.
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/behave/default.nix b/pkgs/development/python-modules/behave/default.nix
index e7a9de7f1bc0..60ba28069ab0 100644
--- a/pkgs/development/python-modules/behave/default.nix
+++ b/pkgs/development/python-modules/behave/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
 
   # timing-based test flaky on Darwin
   # https://github.com/NixOS/nixpkgs/pull/97737#issuecomment-691489824
-  disabledTests = lib.optionals stdenv.isDarwin [ "test_step_decorator_async_run_until_complete" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "test_step_decorator_async_run_until_complete" ];
 
   postCheck = ''
     ${python.interpreter} bin/behave -f progress3 --stop --tags='~@xfail' features/
diff --git a/pkgs/development/python-modules/binwalk/default.nix b/pkgs/development/python-modules/binwalk/default.nix
index 25365c67fbde..024bd4d2dea3 100644
--- a/pkgs/development/python-modules/binwalk/default.nix
+++ b/pkgs/development/python-modules/binwalk/default.nix
@@ -55,7 +55,7 @@ buildPythonPackage rec {
       pyqtgraph
       pyqt5
     ]
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       cramfsprogs
       cramfsswap
       sasquatch
diff --git a/pkgs/development/python-modules/black/default.nix b/pkgs/development/python-modules/black/default.nix
index 06b53f599e30..de9a6d9d48b6 100644
--- a/pkgs/development/python-modules/black/default.nix
+++ b/pkgs/development/python-modules/black/default.nix
@@ -86,7 +86,7 @@ buildPythonPackage rec {
       # Make /build the project root for black tests to avoid excluding files.
       touch ../.git
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Work around https://github.com/psf/black/issues/2105
       export TMPDIR="/tmp"
     '';
@@ -96,7 +96,7 @@ buildPythonPackage rec {
       # requires network access
       "test_gen_check_output"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # fails on darwin
       "test_expression_diff"
       # Fail on Hydra, see https://github.com/NixOS/nixpkgs/pull/130785
@@ -104,7 +104,7 @@ buildPythonPackage rec {
       "test_skip_magic_trailing_comma"
     ];
   # multiple tests exceed max open files on hydra builders
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   meta = with lib; {
     description = "Uncompromising Python code formatter";
diff --git a/pkgs/development/python-modules/blackjax/default.nix b/pkgs/development/python-modules/blackjax/default.nix
index 9f7917738665..b58c73367655 100644
--- a/pkgs/development/python-modules/blackjax/default.nix
+++ b/pkgs/development/python-modules/blackjax/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
 
   disabledTestPaths =
     [ "tests/test_benchmarks.py" ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # Assertion errors on numerical values
       "tests/mcmc/test_integrators.py"
     ];
@@ -64,7 +64,7 @@ buildPythonPackage rec {
       # too slow
       "test_adaptive_tempered_smc"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # Numerical test (AssertionError)
       # https://github.com/blackjax-devs/blackjax/issues/668
       "test_chees_adaptation"
diff --git a/pkgs/development/python-modules/bpycv/default.nix b/pkgs/development/python-modules/bpycv/default.nix
index 97fd086b1f5c..e4ad37696e25 100644
--- a/pkgs/development/python-modules/bpycv/default.nix
+++ b/pkgs/development/python-modules/bpycv/default.nix
@@ -61,7 +61,7 @@ buildPythonPackage rec {
     homepage = "https://github.com/DIYer22/bpycv";
     license = licenses.mit;
     maintainers = [ maintainers.lucasew ];
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     inherit (blender.meta) platforms;
   };
 }
diff --git a/pkgs/development/python-modules/breezy/default.nix b/pkgs/development/python-modules/breezy/default.nix
index de779d7f3e4c..b6316ad036e7 100644
--- a/pkgs/development/python-modules/breezy/default.nix
+++ b/pkgs/development/python-modules/breezy/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
     setuptools-rust
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   propagatedBuildInputs =
     [
diff --git a/pkgs/development/python-modules/build/default.nix b/pkgs/development/python-modules/build/default.nix
index b3a8c905bc8b..d3329230305e 100644
--- a/pkgs/development/python-modules/build/default.nix
+++ b/pkgs/development/python-modules/build/default.nix
@@ -86,7 +86,7 @@ buildPythonPackage rec {
           "test_output"
           "test_wheel_metadata"
         ]
-        ++ lib.optionals stdenv.isDarwin [
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [
           # Expects Apple's Python and its quirks
           "test_can_get_venv_paths_with_conflicting_default_scheme"
         ];
diff --git a/pkgs/development/python-modules/bx-py-utils/default.nix b/pkgs/development/python-modules/bx-py-utils/default.nix
index ccb98329a3b4..757b2d7e9f21 100644
--- a/pkgs/development/python-modules/bx-py-utils/default.nix
+++ b/pkgs/development/python-modules/bx-py-utils/default.nix
@@ -74,7 +74,7 @@ buildPythonPackage rec {
 
   disabledTestPaths =
     [ "bx_py_utils_tests/tests/test_project_setup.py" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # processify() doesn't work under darwin
       # https://github.com/boxine/bx_py_utils/issues/80
       "bx_py_utils_tests/tests/test_processify.py"
diff --git a/pkgs/development/python-modules/bytewax/default.nix b/pkgs/development/python-modules/bytewax/default.nix
index 22d022c454be..36c1efc4266c 100644
--- a/pkgs/development/python-modules/bytewax/default.nix
+++ b/pkgs/development/python-modules/bytewax/default.nix
@@ -104,6 +104,6 @@ buildPythonPackage rec {
       kfollesdal
     ];
     # mismatched type expected u8, found i8
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/python-modules/capstone/4.nix b/pkgs/development/python-modules/capstone/4.nix
index 66b57a01bcb2..b7c31d336091 100644
--- a/pkgs/development/python-modules/capstone/4.nix
+++ b/pkgs/development/python-modules/capstone/4.nix
@@ -30,7 +30,7 @@ buildPythonPackage {
 
   # aarch64 only available from MacOS SDK 11 onwards, so fix the version tag.
   # otherwise, bdist_wheel may detect "macosx_10_6_arm64" which doesn't make sense.
-  setupPyBuildFlags = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  setupPyBuildFlags = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     "--plat-name"
     "macosx_11_0"
   ];
diff --git a/pkgs/development/python-modules/capstone/default.nix b/pkgs/development/python-modules/capstone/default.nix
index 74035c9bef30..e735871268e5 100644
--- a/pkgs/development/python-modules/capstone/default.nix
+++ b/pkgs/development/python-modules/capstone/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
 
   # aarch64 only available from MacOS SDK 11 onwards, so fix the version tag.
   # otherwise, bdist_wheel may detect "macosx_10_6_arm64" which doesn't make sense.
-  setupPyBuildFlags = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  setupPyBuildFlags = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     "--plat-name"
     "macosx_11_0"
   ];
diff --git a/pkgs/development/python-modules/capturer/default.nix b/pkgs/development/python-modules/capturer/default.nix
index 856da1f95369..b9895dd18f97 100644
--- a/pkgs/development/python-modules/capturer/default.nix
+++ b/pkgs/development/python-modules/capturer/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ humanfriendly ];
 
   # hangs on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [ pytestCheckHook ];
 
   meta = with lib; {
diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index 9548bd1214d8..0f03b20e196d 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -86,7 +86,7 @@ buildPythonPackage rec {
   # Make /etc/protocols accessible to allow socket.getprotobyname('tcp') in sandbox,
   # also /etc/resolv.conf is referenced by some tests
   preCheck =
-    (lib.optionalString stdenv.isLinux ''
+    (lib.optionalString stdenv.hostPlatform.isLinux ''
       echo "nameserver 127.0.0.1" > resolv.conf
       export NIX_REDIRECTS=/etc/protocols=${iana-etc}/etc/protocols:/etc/resolv.conf=$(realpath resolv.conf)
       export LD_PRELOAD=${libredirect}/lib/libredirect.so
diff --git a/pkgs/development/python-modules/celery/default.nix b/pkgs/development/python-modules/celery/default.nix
index d5c372c5d498..99854b9d772e 100644
--- a/pkgs/development/python-modules/celery/default.nix
+++ b/pkgs/development/python-modules/celery/default.nix
@@ -97,7 +97,7 @@ buildPythonPackage rec {
       "test_stamping_headers_in_options"
       "test_stamping_with_replace"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Too many open files on hydra
       "test_cleanup"
       "test_with_autoscaler_file_descriptor_safety"
diff --git a/pkgs/development/python-modules/cffi/default.nix b/pkgs/development/python-modules/cffi/default.nix
index 9fbbdd371f9b..6f12d691c7d1 100644
--- a/pkgs/development/python-modules/cffi/default.nix
+++ b/pkgs/development/python-modules/cffi/default.nix
@@ -49,7 +49,7 @@ else
         ./clang-pointer-substraction-warning.diff
       ];
 
-    postPatch = lib.optionalString stdenv.isDarwin ''
+    postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Remove setup.py impurities
       substituteInPlace setup.py \
         --replace "'-iwithsysroot/usr/include/ffi'" "" \
diff --git a/pkgs/development/python-modules/cffsubr/default.nix b/pkgs/development/python-modules/cffsubr/default.nix
index c9642235e37e..46dabb2711af 100644
--- a/pkgs/development/python-modules/cffsubr/default.nix
+++ b/pkgs/development/python-modules/cffsubr/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "cffsubr" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     changelog = "https://github.com/adobe-type-tools/cffsubr/releases/tag/v${version}";
     description = "Standalone CFF subroutinizer based on AFDKO tx";
     mainProgram = "cffsubr";
diff --git a/pkgs/development/python-modules/cheroot/default.nix b/pkgs/development/python-modules/cheroot/default.nix
index 01773d1c20cf..2b4c9f427acb 100644
--- a/pkgs/development/python-modules/cheroot/default.nix
+++ b/pkgs/development/python-modules/cheroot/default.nix
@@ -76,7 +76,7 @@ buildPythonPackage rec {
       "tls" # touches network
       "peercreds_unix_sock" # test urls no longer allowed
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "http_over_https_error"
       "bind_addr_unix"
       "test_ssl_env"
diff --git a/pkgs/development/python-modules/cherrypy/default.nix b/pkgs/development/python-modules/cherrypy/default.nix
index 71d9a9aedfb5..1b0574d05726 100644
--- a/pkgs/development/python-modules/cherrypy/default.nix
+++ b/pkgs/development/python-modules/cherrypy/default.nix
@@ -101,9 +101,9 @@ buildPythonPackage rec {
       "test_1_Ram_Concurrency"
       "test_2_File_Concurrency"
     ]
-    ++ lib.optionals stdenv.isDarwin [ "test_block" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_block" ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [ "cherrypy/test/test_config_server.py" ];
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [ "cherrypy/test/test_config_server.py" ];
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/chromadb/default.nix b/pkgs/development/python-modules/chromadb/default.nix
index fa1f0f94591c..eb44d2a9b5c2 100644
--- a/pkgs/development/python-modules/chromadb/default.nix
+++ b/pkgs/development/python-modules/chromadb/default.nix
@@ -91,7 +91,7 @@ buildPythonPackage rec {
   buildInputs = [
     openssl
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   dependencies = [
     bcrypt
@@ -175,6 +175,6 @@ buildPythonPackage rec {
     license = licenses.asl20;
     maintainers = with maintainers; [ fab ];
     mainProgram = "chroma";
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/python-modules/circus/default.nix b/pkgs/development/python-modules/circus/default.nix
index b87e4c42568b..858b9142121c 100644
--- a/pkgs/development/python-modules/circus/default.nix
+++ b/pkgs/development/python-modules/circus/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
   ];
 
   # On darwin: Too many open files
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ulimit -n 1024
   '';
 
diff --git a/pkgs/development/python-modules/cirq-core/default.nix b/pkgs/development/python-modules/cirq-core/default.nix
index d0a506c5f996..4c20d01f302f 100644
--- a/pkgs/development/python-modules/cirq-core/default.nix
+++ b/pkgs/development/python-modules/cirq-core/default.nix
@@ -89,7 +89,7 @@ buildPythonPackage rec {
     "cirq/_version_test.py"
   ];
 
-  disabledTests = lib.optionals stdenv.isAarch64 [
+  disabledTests = lib.optionals stdenv.hostPlatform.isAarch64 [
     # https://github.com/quantumlib/Cirq/issues/5924
     "test_prepare_two_qubit_state_using_sqrt_iswap"
   ];
diff --git a/pkgs/development/python-modules/clarabel/default.nix b/pkgs/development/python-modules/clarabel/default.nix
index d81f01b34fc5..f6e4e09edc7c 100644
--- a/pkgs/development/python-modules/clarabel/default.nix
+++ b/pkgs/development/python-modules/clarabel/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   propagatedBuildInputs = [
     numpy
diff --git a/pkgs/development/python-modules/clickgen/default.nix b/pkgs/development/python-modules/clickgen/default.nix
index 50b2f1b1d241..a8109184f251 100644
--- a/pkgs/development/python-modules/clickgen/default.nix
+++ b/pkgs/development/python-modules/clickgen/default.nix
@@ -55,6 +55,6 @@ buildPythonPackage rec {
     maintainers = with maintainers; [ AdsonCicilioti ];
     # fails with:
     # ld: unknown option: -zdefs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/clustershell/default.nix b/pkgs/development/python-modules/clustershell/default.nix
index 9c166af7f550..f52f290be8d5 100644
--- a/pkgs/development/python-modules/clustershell/default.nix
+++ b/pkgs/development/python-modules/clustershell/default.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Scalable Python framework for cluster administration";
     homepage = "https://cea-hpc.github.io/clustershell";
     license = licenses.lgpl21;
diff --git a/pkgs/development/python-modules/cmd2/default.nix b/pkgs/development/python-modules/cmd2/default.nix
index c78eda407871..75b2d0547909 100644
--- a/pkgs/development/python-modules/cmd2/default.nix
+++ b/pkgs/development/python-modules/cmd2/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
     ''
       sed -i "/--cov/d" setup.cfg
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Fake the impure dependencies pbpaste and pbcopy
       mkdir bin
       echo '#!${stdenv.shell}' > bin/pbpaste
@@ -69,7 +69,7 @@ buildPythonPackage rec {
       export PATH=$(realpath bin):$PATH
     '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "cmd2" ];
 
diff --git a/pkgs/development/python-modules/cmdstanpy/default.nix b/pkgs/development/python-modules/cmdstanpy/default.nix
index cb31be20a170..ead29ecbb939 100644
--- a/pkgs/development/python-modules/cmdstanpy/default.nix
+++ b/pkgs/development/python-modules/cmdstanpy/default.nix
@@ -77,7 +77,7 @@ buildPythonPackage rec {
       "test_pathfinder_threads"
       "test_save_profile"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_init_types" # CmdStan error: error during processing Operation not permitted
     ];
 
diff --git a/pkgs/development/python-modules/cmigemo/default.nix b/pkgs/development/python-modules/cmigemo/default.nix
index 599f91f14106..9237631c0532 100644
--- a/pkgs/development/python-modules/cmigemo/default.nix
+++ b/pkgs/development/python-modules/cmigemo/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "cmigemo" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/mooz/python-cmigemo";
     description = "Pure python binding for C/Migemo";
     license = licenses.mit;
diff --git a/pkgs/development/python-modules/cmsis-pack-manager/default.nix b/pkgs/development/python-modules/cmsis-pack-manager/default.nix
index 85ef05db3e52..554e9516d53f 100644
--- a/pkgs/development/python-modules/cmsis-pack-manager/default.nix
+++ b/pkgs/development/python-modules/cmsis-pack-manager/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
   propagatedNativeBuildInputs = [ cffi ];
-  buildInputs = [ libiconv ] ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+  buildInputs = [ libiconv ] ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
   propagatedBuildInputs = [
     appdirs
     pyyaml
diff --git a/pkgs/development/python-modules/coloredlogs/default.nix b/pkgs/development/python-modules/coloredlogs/default.nix
index 348d4080498d..182c5c370624 100644
--- a/pkgs/development/python-modules/coloredlogs/default.nix
+++ b/pkgs/development/python-modules/coloredlogs/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
 
   # capturer is broken on darwin / py38, so we skip the test until a fix for
   # https://github.com/xolox/python-capturer/issues/10 is released.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     # Required for the CLI test
diff --git a/pkgs/development/python-modules/commoncode/default.nix b/pkgs/development/python-modules/commoncode/default.nix
index 359f1935f2fc..3e8c1eb0182e 100644
--- a/pkgs/development/python-modules/commoncode/default.nix
+++ b/pkgs/development/python-modules/commoncode/default.nix
@@ -57,7 +57,7 @@ buildPythonPackage rec {
       "test_walk_can_walk_non_utf8_path_from_unicode_path"
       "test_resource_iter_can_walk_non_utf8_path_from_unicode_path_with_dirs"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # expected result is tailored towards the quirks of upstream's
       # CI environment on darwin
       "test_searchable_paths"
diff --git a/pkgs/development/python-modules/configparser/default.nix b/pkgs/development/python-modules/configparser/default.nix
index d078fceee371..6e6e38f0b3af 100644
--- a/pkgs/development/python-modules/configparser/default.nix
+++ b/pkgs/development/python-modules/configparser/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ pytestCheckHook ];
 
   preConfigure = ''
-    export LC_ALL=${if stdenv.isDarwin then "en_US" else "C"}.UTF-8
+    export LC_ALL=${if stdenv.hostPlatform.isDarwin then "en_US" else "C"}.UTF-8
   '';
 
   meta = with lib; {
diff --git a/pkgs/development/python-modules/construct/default.nix b/pkgs/development/python-modules/construct/default.nix
index 729d6df5644d..d21dd11e010a 100644
--- a/pkgs/development/python-modules/construct/default.nix
+++ b/pkgs/development/python-modules/construct/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "construct" ];
 
-  disabledTests = [ "test_benchmarks" ] ++ lib.optionals stdenv.isDarwin [ "test_multiprocessing" ];
+  disabledTests = [ "test_benchmarks" ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_multiprocessing" ];
 
   meta = with lib; {
     description = "Powerful declarative parser (and builder) for binary data";
diff --git a/pkgs/development/python-modules/cot/default.nix b/pkgs/development/python-modules/cot/default.nix
index ac144b26450b..fb3a138627ad 100644
--- a/pkgs/development/python-modules/cot/default.nix
+++ b/pkgs/development/python-modules/cot/default.nix
@@ -69,7 +69,7 @@ buildPythonPackage rec {
     "test_serial_fixup_stubbed"
     "test_serial_fixup_stubbed_create"
     "test_serial_fixup_stubbed_vm_not_found"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_serial_fixup_invalid_host" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_serial_fixup_invalid_host" ];
 
   pythonImportsCheck = [ "COT" ];
 
diff --git a/pkgs/development/python-modules/craft-application/default.nix b/pkgs/development/python-modules/craft-application/default.nix
index 04c488586c9e..96bec81c9172 100644
--- a/pkgs/development/python-modules/craft-application/default.nix
+++ b/pkgs/development/python-modules/craft-application/default.nix
@@ -96,7 +96,7 @@ buildPythonPackage rec {
       # Tests expecting pytest-time
       "test_monitor_builds_success"
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       # These tests have hardcoded "amd64" strings which fail on aarch64
       "test_process_grammar_build_for"
       "test_process_grammar_platform"
diff --git a/pkgs/development/python-modules/craft-parts/default.nix b/pkgs/development/python-modules/craft-parts/default.nix
index 2ad66a7d4a75..c3fd4e2abb54 100644
--- a/pkgs/development/python-modules/craft-parts/default.nix
+++ b/pkgs/development/python-modules/craft-parts/default.nix
@@ -96,7 +96,7 @@ buildPythonPackage rec {
       "tests/unit/packages/test_deb.py"
       "tests/unit/packages/test_chisel.py"
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       # These tests have hardcoded "amd64" strings which fail on aarch64
       "tests/unit/executor/test_environment.py"
       "tests/unit/features/overlay/test_executor_environment.py"
diff --git a/pkgs/development/python-modules/cram/default.nix b/pkgs/development/python-modules/cram/default.nix
index 13ed15f5246d..1f92211953ca 100644
--- a/pkgs/development/python-modules/cram/default.nix
+++ b/pkgs/development/python-modules/cram/default.nix
@@ -36,6 +36,6 @@ buildPythonPackage rec {
     license = lib.licenses.gpl2Plus;
     maintainers = with lib.maintainers; [ jluttine ];
     # Tests fail on i686: https://hydra.nixos.org/build/52896671/nixlog/4
-    broken = stdenv.isi686;
+    broken = stdenv.hostPlatform.isi686;
   };
 }
diff --git a/pkgs/development/python-modules/cramjam/default.nix b/pkgs/development/python-modules/cramjam/default.nix
index e61e75da117f..34571f05f774 100644
--- a/pkgs/development/python-modules/cramjam/default.nix
+++ b/pkgs/development/python-modules/cramjam/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   nativeCheckInputs = [
     hypothesis
diff --git a/pkgs/development/python-modules/cryptg/default.nix b/pkgs/development/python-modules/cryptg/default.nix
index 43e5ac7e6163..c038eb46668a 100644
--- a/pkgs/development/python-modules/cryptg/default.nix
+++ b/pkgs/development/python-modules/cryptg/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
     cargo
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # has no tests
   doCheck = false;
diff --git a/pkgs/development/python-modules/cryptography/default.nix b/pkgs/development/python-modules/cryptography/default.nix
index 29076051578e..1d1e43a03165 100644
--- a/pkgs/development/python-modules/cryptography/default.nix
+++ b/pkgs/development/python-modules/cryptography/default.nix
@@ -57,7 +57,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Security
       libiconv
     ]
diff --git a/pkgs/development/python-modules/css-inline/default.nix b/pkgs/development/python-modules/css-inline/default.nix
index b9faf71842b6..a108599eb6ba 100644
--- a/pkgs/development/python-modules/css-inline/default.nix
+++ b/pkgs/development/python-modules/css-inline/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Security
     SystemConfiguration
@@ -70,7 +70,7 @@ buildPythonPackage rec {
       "test_cache"
       "test_remote_stylesheet"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # pyo3_runtime.PanicException: event loop thread panicked
       "test_invalid_href"
     ];
diff --git a/pkgs/development/python-modules/curio/default.nix b/pkgs/development/python-modules/curio/default.nix
index 087d85405e26..434af5cb974a 100644
--- a/pkgs/development/python-modules/curio/default.nix
+++ b/pkgs/development/python-modules/curio/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
       "test_unix_echo" # socket bind error on hydra when built with other packages
       "test_unix_ssl_server" # socket bind error on hydra when built with other packages
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # connects to python.org:1, expects an OsError, hangs in the darwin sandbox
       "test_create_bad_connection"
     ];
diff --git a/pkgs/development/python-modules/curtsies/default.nix b/pkgs/development/python-modules/curtsies/default.nix
index b2467a02e09b..7be20c559019 100644
--- a/pkgs/development/python-modules/curtsies/default.nix
+++ b/pkgs/development/python-modules/curtsies/default.nix
@@ -42,6 +42,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/bpython/curtsies/blob/v${version}/CHANGELOG.md";
     license = licenses.mit;
     maintainers = with maintainers; [ flokli ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/cvxpy/default.nix b/pkgs/development/python-modules/cvxpy/default.nix
index 7ed3c7563777..4e49046a1e23 100644
--- a/pkgs/development/python-modules/cvxpy/default.nix
+++ b/pkgs/development/python-modules/cvxpy/default.nix
@@ -21,7 +21,7 @@
   # checks
   pytestCheckHook,
 
-  useOpenmp ? (!stdenv.isDarwin),
+  useOpenmp ? (!stdenv.hostPlatform.isDarwin),
 }:
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/cython/0.nix b/pkgs/development/python-modules/cython/0.nix
index 8dc7db31fe3f..a484892c0040 100644
--- a/pkgs/development/python-modules/cython/0.nix
+++ b/pkgs/development/python-modules/cython/0.nix
@@ -24,8 +24,8 @@ let
     # Some tests in the test suite isn't working on aarch64. Disable them for
     # now until upstream finds a workaround.
     # Upstream issue here: https://github.com/cython/cython/issues/2308
-    ++ lib.optionals stdenv.isAarch64 [ "numpy_memoryview" ]
-    ++ lib.optionals stdenv.isi686 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [ "numpy_memoryview" ]
+    ++ lib.optionals stdenv.hostPlatform.isi686 [
       "future_division"
       "overflow_check_longlong"
     ];
@@ -87,7 +87,7 @@ buildPythonPackage rec {
   # https://github.com/cython/cython/issues/2785
   # Temporary solution
   doCheck = false;
-  # doCheck = !stdenv.isDarwin;
+  # doCheck = !stdenv.hostPlatform.isDarwin;
 
   # force regeneration of generated code in source distributions
   # https://github.com/cython/cython/issues/5089
diff --git a/pkgs/development/python-modules/cython/default.nix b/pkgs/development/python-modules/cython/default.nix
index 2d3333ecec6a..63e2821cde39 100644
--- a/pkgs/development/python-modules/cython/default.nix
+++ b/pkgs/development/python-modules/cython/default.nix
@@ -26,8 +26,8 @@ let
     # Some tests in the test suite isn't working on aarch64. Disable them for
     # now until upstream finds a workaround.
     # Upstream issue here: https://github.com/cython/cython/issues/2308
-    ++ lib.optionals stdenv.isAarch64 [ "numpy_memoryview" ]
-    ++ lib.optionals stdenv.isi686 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [ "numpy_memoryview" ]
+    ++ lib.optionals stdenv.hostPlatform.isi686 [
       "future_division"
       "overflow_check_longlong"
     ];
@@ -70,7 +70,7 @@ buildPythonPackage rec {
   # https://github.com/cython/cython/issues/2785
   # Temporary solution
   doCheck = false;
-  # doCheck = !stdenv.isDarwin;
+  # doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru.tests = {
     inherit sage;
diff --git a/pkgs/development/python-modules/daphne/default.nix b/pkgs/development/python-modules/daphne/default.nix
index 0cae95af4c80..7e85adb0c29d 100644
--- a/pkgs/development/python-modules/daphne/default.nix
+++ b/pkgs/development/python-modules/daphne/default.nix
@@ -59,7 +59,7 @@ buildPythonPackage rec {
   ];
 
   # Most tests fail on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "daphne" ];
 
diff --git a/pkgs/development/python-modules/darkdetect/default.nix b/pkgs/development/python-modules/darkdetect/default.nix
index fe38977f2ac0..c51f22fb368d 100644
--- a/pkgs/development/python-modules/darkdetect/default.nix
+++ b/pkgs/development/python-modules/darkdetect/default.nix
@@ -27,7 +27,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "darkdetect" ];
 
-  postPatch = lib.optionalString (stdenv.isLinux) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isLinux) ''
     substituteInPlace darkdetect/_linux_detect.py \
       --replace "'gsettings'" "'${glib.bin}/bin/gsettings'"
   '';
diff --git a/pkgs/development/python-modules/dask-jobqueue/default.nix b/pkgs/development/python-modules/dask-jobqueue/default.nix
index c4c2100ae032..8c43fc9f260f 100644
--- a/pkgs/development/python-modules/dask-jobqueue/default.nix
+++ b/pkgs/development/python-modules/dask-jobqueue/default.nix
@@ -83,7 +83,7 @@ buildPythonPackage rec {
       "test_worker_name_uses_cluster_name"
       "test_wrong_parameter_error"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # ValueError: invalid operation on non-started TCPListener
       "test_header"
       "test_lsf_unit_detection"
diff --git a/pkgs/development/python-modules/dask/default.nix b/pkgs/development/python-modules/dask/default.nix
index 7ea1779fd21e..d26caf858cd0 100644
--- a/pkgs/development/python-modules/dask/default.nix
+++ b/pkgs/development/python-modules/dask/default.nix
@@ -123,14 +123,14 @@ let
     ];
 
     disabledTests =
-      lib.optionals stdenv.isDarwin [
+      lib.optionals stdenv.hostPlatform.isDarwin [
         # Test requires features of python3Packages.psutil that are
         # blocked in sandboxed-builds
         "test_auto_blocksize_csv"
         # AttributeError: 'str' object has no attribute 'decode'
         "test_read_dir_nometa"
       ]
-      ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+      ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
         # concurrent.futures.process.BrokenProcessPool: A process in the process pool terminated abpruptly...
         "test_foldby_tree_reduction"
         "test_to_bag"
diff --git a/pkgs/development/python-modules/datafusion/default.nix b/pkgs/development/python-modules/datafusion/default.nix
index e73d37c4486c..b7c68f839e87 100644
--- a/pkgs/development/python-modules/datafusion/default.nix
+++ b/pkgs/development/python-modules/datafusion/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ protobuf ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       Security
       SystemConfiguration
diff --git a/pkgs/development/python-modules/datalad-gooey/default.nix b/pkgs/development/python-modules/datalad-gooey/default.nix
index a84e6c7a2be7..fcc3fa376330 100644
--- a/pkgs/development/python-modules/datalad-gooey/default.nix
+++ b/pkgs/development/python-modules/datalad-gooey/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage {
     datalad-next
     outdated
     datalad
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AppleScriptKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.AppleScriptKit ];
 
   pythonRemoveDeps = [ "applescript" ];
 
diff --git a/pkgs/development/python-modules/datatable/default.nix b/pkgs/development/python-modules/datatable/default.nix
index 6a7c80ada33e..1608ec12e8f2 100644
--- a/pkgs/development/python-modules/datatable/default.nix
+++ b/pkgs/development/python-modules/datatable/default.nix
@@ -53,7 +53,7 @@ buildPythonPackage rec {
   ];
 
   LLVM = llvm;
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-isystem ${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-isystem ${lib.getDev libcxx}/include/c++/v1";
 
   # test suite is very cpu intensive, only run small subset to ensure package is working as expected
   pytestFlagsArray = [ "tests/test-sets.py" ];
diff --git a/pkgs/development/python-modules/dbt-extractor/default.nix b/pkgs/development/python-modules/dbt-extractor/default.nix
index 2e3eecc5dfcd..89066e5c9c50 100644
--- a/pkgs/development/python-modules/dbt-extractor/default.nix
+++ b/pkgs/development/python-modules/dbt-extractor/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # no python tests exist
   doCheck = false;
diff --git a/pkgs/development/python-modules/debugpy/default.nix b/pkgs/development/python-modules/debugpy/default.nix
index 18e9acec9b57..3dea1af5b378 100644
--- a/pkgs/development/python-modules/debugpy/default.nix
+++ b/pkgs/development/python-modules/debugpy/default.nix
@@ -58,14 +58,14 @@ buildPythonPackage rec {
       # - https://github.com/NixOS/nixpkgs/issues/251045
       ./skip-attach-pid-tests.patch
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       # Hard code GDB path (used to attach to process)
       (substituteAll {
         src = ./hardcode-gdb.patch;
         inherit gdb;
       })
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Hard code LLDB path (used to attach to process)
       (substituteAll {
         src = ./hardcode-lldb.patch;
@@ -119,12 +119,12 @@ buildPythonPackage rec {
       export DEBUGPY_PROCESS_SPAWN_TIMEOUT=0
       export DEBUGPY_PROCESS_EXIT_TIMEOUT=0
     ''
-    + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
       # https://github.com/python/cpython/issues/74570#issuecomment-1093748531
       export no_proxy='*';
     '';
 
-  postCheck = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  postCheck = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     unset no_proxy
   '';
 
diff --git a/pkgs/development/python-modules/deltalake/default.nix b/pkgs/development/python-modules/deltalake/default.nix
index a30d199a2287..e4065fa10b97 100644
--- a/pkgs/development/python-modules/deltalake/default.nix
+++ b/pkgs/development/python-modules/deltalake/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
     libiconv
diff --git a/pkgs/development/python-modules/demesdraw/default.nix b/pkgs/development/python-modules/demesdraw/default.nix
index d4fe828315d3..6a3c4d44e99a 100644
--- a/pkgs/development/python-modules/demesdraw/default.nix
+++ b/pkgs/development/python-modules/demesdraw/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
 
   # This variable is needed to suppress the "Trace/BPT trap: 5" error in Darwin's checkPhase.
   # Not sure of the details, but we can avoid it by changing the matplotlib backend during testing.
-  env.MPLBACKEND = lib.optionalString stdenv.isDarwin "Agg";
+  env.MPLBACKEND = lib.optionalString stdenv.hostPlatform.isDarwin "Agg";
 
   nativeCheckInputs = [
     pytestCheckHook
diff --git a/pkgs/development/python-modules/deploykit/default.nix b/pkgs/development/python-modules/deploykit/default.nix
index 01183b27a8d7..e2882a7fa7f5 100644
--- a/pkgs/development/python-modules/deploykit/default.nix
+++ b/pkgs/development/python-modules/deploykit/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [ "test_ssh" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "test_ssh" ];
 
   # don't swallow stdout/stderr
   pytestFlagsArray = [ "-s" ];
diff --git a/pkgs/development/python-modules/desktop-notifier/default.nix b/pkgs/development/python-modules/desktop-notifier/default.nix
index a6260c35ad5f..30c5275edbf9 100644
--- a/pkgs/development/python-modules/desktop-notifier/default.nix
+++ b/pkgs/development/python-modules/desktop-notifier/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
       bidict
       packaging
     ]
-    ++ lib.optionals stdenv.isLinux [ dbus-fast ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ dbus-fast ]
     ++ lib.optionals stdenv.hostPlatform.isDarwin [ rubicon-objc ];
 
   # no tests available, do the imports check instead
diff --git a/pkgs/development/python-modules/detectron2/default.nix b/pkgs/development/python-modules/detectron2/default.nix
index 2247b4581a4d..95506510e214 100644
--- a/pkgs/development/python-modules/detectron2/default.nix
+++ b/pkgs/development/python-modules/detectron2/default.nix
@@ -163,7 +163,7 @@ buildPythonPackage {
       "test_overlay_instances_no_boxes"
       "test_get_bounding_box"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       "test_build_batch_dataloader_inference"
       "test_build_dataloader_inference"
       "test_build_iterable_dataloader_inference"
diff --git a/pkgs/development/python-modules/devito/default.nix b/pkgs/development/python-modules/devito/default.nix
index 95ec86ff5eb3..195c77b97864 100644
--- a/pkgs/development/python-modules/devito/default.nix
+++ b/pkgs/development/python-modules/devito/default.nix
@@ -100,18 +100,18 @@ buildPythonPackage rec {
       "test_subdomainset_mpi"
       "test_subdomains_mpi"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # FAILED tests/test_unexpansion.py::Test2Pass::test_v0 - assert False
       "test_v0"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # FAILED tests/test_caching.py::TestCaching::test_special_symbols - ValueError: not enough values to unpack (expected 3, got 2)
       "test_special_symbols"
 
       # FAILED tests/test_unexpansion.py::Test2Pass::test_v0 - codepy.CompileError: module compilation failed
       "test_v0"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # Numerical tests
       "test_lm_fb"
       "test_lm_ds"
@@ -127,7 +127,7 @@ buildPythonPackage rec {
       "tests/test_dse.py"
       "tests/test_gradient.py"
     ]
-    ++ lib.optionals ((stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin) [ "tests/test_dle.py" ];
+    ++ lib.optionals ((stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin) [ "tests/test_dle.py" ];
 
   pythonImportsCheck = [ "devito" ];
 
diff --git a/pkgs/development/python-modules/diskcache/default.nix b/pkgs/development/python-modules/diskcache/default.nix
index c2a18535a763..8211267f2eb0 100644
--- a/pkgs/development/python-modules/diskcache/default.nix
+++ b/pkgs/development/python-modules/diskcache/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   '';
 
   # Darwin sandbox causes most tests to fail
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTests = [
     # Very time sensitive, can fail on over subscribed machines
diff --git a/pkgs/development/python-modules/django-postgresql-netfields/default.nix b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
index d3fb086fc417..cf9685e0b2ac 100644
--- a/pkgs/development/python-modules/django-postgresql-netfields/default.nix
+++ b/pkgs/development/python-modules/django-postgresql-netfields/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage rec {
     six
   ];
 
-  doCheck = !stdenv.isDarwin; # could not create shared memory segment: Operation not permitted
+  doCheck = !stdenv.hostPlatform.isDarwin; # could not create shared memory segment: Operation not permitted
 
   nativeCheckInputs = [
     djangorestframework
diff --git a/pkgs/development/python-modules/django-q/default.nix b/pkgs/development/python-modules/django-q/default.nix
index 99b8aec53a36..0cc7ea246e8c 100644
--- a/pkgs/development/python-modules/django-q/default.nix
+++ b/pkgs/development/python-modules/django-q/default.nix
@@ -76,7 +76,7 @@ buildPythonPackage rec {
     "test_mongo"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Multiprocessing distributed task queue for Django";
diff --git a/pkgs/development/python-modules/django/4.nix b/pkgs/development/python-modules/django/4.nix
index 99d71f2b38b1..2d7bb6ce9dde 100644
--- a/pkgs/development/python-modules/django/4.nix
+++ b/pkgs/development/python-modules/django/4.nix
@@ -118,7 +118,7 @@ buildPythonPackage rec {
     tzdata
   ] ++ lib.flatten (lib.attrValues passthru.optional-dependencies);
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     # make sure the installed library gets imported
diff --git a/pkgs/development/python-modules/django/5.nix b/pkgs/development/python-modules/django/5.nix
index dd124f49e152..6cf85445c402 100644
--- a/pkgs/development/python-modules/django/5.nix
+++ b/pkgs/development/python-modules/django/5.nix
@@ -114,7 +114,7 @@ buildPythonPackage rec {
     tzdata
   ] ++ lib.flatten (lib.attrValues optional-dependencies);
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     # make sure the installed library gets imported
diff --git a/pkgs/development/python-modules/dlinfo/default.nix b/pkgs/development/python-modules/dlinfo/default.nix
index bb9c849592dd..1b774b8e85c0 100644
--- a/pkgs/development/python-modules/dlinfo/default.nix
+++ b/pkgs/development/python-modules/dlinfo/default.nix
@@ -29,6 +29,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/cloudflightio/python-dlinfo";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ dotlambda ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/dm-tree/default.nix b/pkgs/development/python-modules/dm-tree/default.nix
index 6062d202a3ce..909cd3aa523a 100644
--- a/pkgs/development/python-modules/dm-tree/default.nix
+++ b/pkgs/development/python-modules/dm-tree/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
   patches = [
     patchCMakeAbseil
     patchCMakePybind
-  ] ++ (lib.optional stdenv.isDarwin ./0003-don-t-configure-apple.patch);
+  ] ++ (lib.optional stdenv.hostPlatform.isDarwin ./0003-don-t-configure-apple.patch);
 
   dontUseCmakeConfigure = true;
 
diff --git a/pkgs/development/python-modules/docker/default.nix b/pkgs/development/python-modules/docker/default.nix
index 7a36c27e8e22..59ab52857824 100644
--- a/pkgs/development/python-modules/docker/default.nix
+++ b/pkgs/development/python-modules/docker/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
   pytestFlagsArray = [ "tests/unit" ];
 
   # Deselect socket tests on Darwin because it hits the path length limit for a Unix domain socket
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "api_test"
     "stream_response"
     "socket_file"
diff --git a/pkgs/development/python-modules/docutils/default.nix b/pkgs/development/python-modules/docutils/default.nix
index cdfb53572213..695d351f03ca 100644
--- a/pkgs/development/python-modules/docutils/default.nix
+++ b/pkgs/development/python-modules/docutils/default.nix
@@ -37,7 +37,7 @@ let
     # Only Darwin needs LANG, but we could set it in general.
     # It's done here conditionally to prevent mass-rebuilds.
     checkPhase =
-      lib.optionalString stdenv.isDarwin ''LANG="en_US.UTF-8" LC_ALL="en_US.UTF-8" ''
+      lib.optionalString stdenv.hostPlatform.isDarwin ''LANG="en_US.UTF-8" LC_ALL="en_US.UTF-8" ''
       + ''
         ${python.interpreter} test/alltests.py
       '';
diff --git a/pkgs/development/python-modules/doit/default.nix b/pkgs/development/python-modules/doit/default.nix
index 4b49ba50fe47..5840b71b18f7 100644
--- a/pkgs/development/python-modules/doit/default.nix
+++ b/pkgs/development/python-modules/doit/default.nix
@@ -34,7 +34,7 @@ let
       cloudpickle
       importlib-metadata
       toml
-    ] ++ lib.optional stdenv.isLinux pyinotify ++ lib.optional stdenv.isDarwin macfsevents;
+    ] ++ lib.optional stdenv.hostPlatform.isLinux pyinotify ++ lib.optional stdenv.hostPlatform.isDarwin macfsevents;
 
     nativeCheckInputs = [
       configclass
@@ -51,7 +51,7 @@ let
     passthru.tests = {
       # hangs on darwin
       check = doit.overridePythonAttrs (_: {
-        doCheck = !stdenv.isDarwin;
+        doCheck = !stdenv.hostPlatform.isDarwin;
       });
     };
 
diff --git a/pkgs/development/python-modules/dramatiq/default.nix b/pkgs/development/python-modules/dramatiq/default.nix
index b44873e99f9a..9eec4bba08fb 100644
--- a/pkgs/development/python-modules/dramatiq/default.nix
+++ b/pkgs/development/python-modules/dramatiq/default.nix
@@ -88,7 +88,7 @@ buildPythonPackage rec {
       "test_rabbitmq_process_10k_fib_with_cli"
       "test_rabbitmq_process_1k_latency_with_cli"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Takes too long for darwin ofborg
       "test_retry_exceptions_can_specify_a_delay"
     ];
diff --git a/pkgs/development/python-modules/dtschema/default.nix b/pkgs/development/python-modules/dtschema/default.nix
index d4875e0da8aa..2dffd2d5bc95 100644
--- a/pkgs/development/python-modules/dtschema/default.nix
+++ b/pkgs/development/python-modules/dtschema/default.nix
@@ -56,7 +56,7 @@ buildPythonPackage rec {
 
     broken = (
       # Library not loaded: @rpath/libfdt.1.dylib
-      stdenv.isDarwin
+      stdenv.hostPlatform.isDarwin
       ||
 
         # see https://github.com/devicetree-org/dt-schema/issues/108
diff --git a/pkgs/development/python-modules/duckdb/default.nix b/pkgs/development/python-modules/duckdb/default.nix
index 132f72d70ee5..77b348e271f0 100644
--- a/pkgs/development/python-modules/duckdb/default.nix
+++ b/pkgs/development/python-modules/duckdb/default.nix
@@ -63,7 +63,7 @@ buildPythonPackage rec {
   ];
 
   # test flags from .github/workflows/Python.yml
-  pytestFlagsArray = [ "--verbose" ] ++ lib.optionals stdenv.isDarwin [ "tests/fast" ];
+  pytestFlagsArray = [ "--verbose" ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "tests/fast" ];
 
   disabledTestPaths = [
     # avoid dependency on mypy
diff --git a/pkgs/development/python-modules/dulwich/default.nix b/pkgs/development/python-modules/dulwich/default.nix
index 0618a1b2aaea..e4b3663dda90 100644
--- a/pkgs/development/python-modules/dulwich/default.nix
+++ b/pkgs/development/python-modules/dulwich/default.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
     rm tests/compat/test_pack.py
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "dulwich" ];
 
diff --git a/pkgs/development/python-modules/dvc-render/default.nix b/pkgs/development/python-modules/dvc-render/default.nix
index 2cab268fecf6..f4df5623013d 100644
--- a/pkgs/development/python-modules/dvc-render/default.nix
+++ b/pkgs/development/python-modules/dvc-render/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
     pytest-test-utils
   ] ++ passthru.optional-dependencies.table ++ passthru.optional-dependencies.markdown;
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [ "tests/test_vega.py" ];
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [ "tests/test_vega.py" ];
 
   pythonImportsCheck = [ "dvc_render" ];
 
diff --git a/pkgs/development/python-modules/e3-core/default.nix b/pkgs/development/python-modules/e3-core/default.nix
index 6b2f8ad763af..a6538d67eb25 100644
--- a/pkgs/development/python-modules/e3-core/default.nix
+++ b/pkgs/development/python-modules/e3-core/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
       tqdm
       stevedore
     ]
-    ++ lib.optional stdenv.isLinux [
+    ++ lib.optional stdenv.hostPlatform.isLinux [
       # See setup.py:24. These are required only on Linux. Darwin has its own set
       # of requirements.
       psutil
diff --git a/pkgs/development/python-modules/elastic-apm/default.nix b/pkgs/development/python-modules/elastic-apm/default.nix
index 6fb1abd35fdb..fb27b98608dd 100644
--- a/pkgs/development/python-modules/elastic-apm/default.nix
+++ b/pkgs/development/python-modules/elastic-apm/default.nix
@@ -85,7 +85,7 @@ buildPythonPackage rec {
       # Exclude tornado tests
       "tests/contrib/asyncio/tornado/tornado_tests.py"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Flaky tests on Darwin
       "tests/utils/threading_tests.py"
     ];
diff --git a/pkgs/development/python-modules/eliot/default.nix b/pkgs/development/python-modules/eliot/default.nix
index e5f447b233c6..04cb574509c2 100644
--- a/pkgs/development/python-modules/eliot/default.nix
+++ b/pkgs/development/python-modules/eliot/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
     pytestCheckHook
     testtools
     twisted
-  ] ++ lib.optionals stdenv.isLinux [ daemontools ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ daemontools ];
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/embrace/default.nix b/pkgs/development/python-modules/embrace/default.nix
index 7572e77728b2..4ad658d7736c 100644
--- a/pkgs/development/python-modules/embrace/default.nix
+++ b/pkgs/development/python-modules/embrace/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
 
   # Some test for hot-reload fails on Darwin, but the rest of the library
   # should remain usable. (https://todo.sr.ht/~olly/embrace-sql/4)
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Embrace SQL keeps your SQL queries in SQL files";
diff --git a/pkgs/development/python-modules/enlighten/default.nix b/pkgs/development/python-modules/enlighten/default.nix
index 826e9fbe7805..ca0916c610a4 100644
--- a/pkgs/development/python-modules/enlighten/default.nix
+++ b/pkgs/development/python-modules/enlighten/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
       "test_floats_prefixed"
       "test_subcounter_prefixed"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # https://github.com/Rockhopper-Technologies/enlighten/issues/44
       "test_autorefresh"
     ];
diff --git a/pkgs/development/python-modules/ephemeral-port-reserve/default.nix b/pkgs/development/python-modules/ephemeral-port-reserve/default.nix
index 2a7e328f978b..d582c5cfc37c 100644
--- a/pkgs/development/python-modules/ephemeral-port-reserve/default.nix
+++ b/pkgs/development/python-modules/ephemeral-port-reserve/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # can't find hostname in our darwin build environment
     "test_fqdn"
   ];
diff --git a/pkgs/development/python-modules/etebase/default.nix b/pkgs/development/python-modules/etebase/default.nix
index 18d5488bee36..5157aa329dcd 100644
--- a/pkgs/development/python-modules/etebase/default.nix
+++ b/pkgs/development/python-modules/etebase/default.nix
@@ -59,7 +59,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   propagatedBuildInputs = [ msgpack ];
 
@@ -76,7 +76,7 @@ buildPythonPackage rec {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://www.etebase.com/";
     description = "Python client library for Etebase";
     license = licenses.bsd3;
diff --git a/pkgs/development/python-modules/eventlet/default.nix b/pkgs/development/python-modules/eventlet/default.nix
index 5fa638ddddd5..24f9ef57ed68 100644
--- a/pkgs/development/python-modules/eventlet/default.nix
+++ b/pkgs/development/python-modules/eventlet/default.nix
@@ -47,7 +47,7 @@ buildPythonPackage rec {
 
   # libredirect is not available on darwin
   # tests hang on pypy indefinitely
-  doCheck = !stdenv.isDarwin && !isPyPy;
+  doCheck = !stdenv.hostPlatform.isDarwin && !isPyPy;
 
   preCheck = lib.optionalString doCheck ''
     echo "nameserver 127.0.0.1" > resolv.conf
diff --git a/pkgs/development/python-modules/evtx/default.nix b/pkgs/development/python-modules/evtx/default.nix
index d0d8f753ea69..a31b963462a3 100644
--- a/pkgs/development/python-modules/evtx/default.nix
+++ b/pkgs/development/python-modules/evtx/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/fastdiff/default.nix b/pkgs/development/python-modules/fastdiff/default.nix
index 1096add5b627..4b906c6d6c1d 100644
--- a/pkgs/development/python-modules/fastdiff/default.nix
+++ b/pkgs/development/python-modules/fastdiff/default.nix
@@ -48,6 +48,6 @@ buildPythonPackage rec {
     license = licenses.mit;
     maintainers = [ ];
     # resulting compiled object panics at import
-    broken = stdenv.is32bit;
+    broken = stdenv.hostPlatform.is32bit;
   };
 }
diff --git a/pkgs/development/python-modules/fastjsonschema/default.nix b/pkgs/development/python-modules/fastjsonschema/default.nix
index e3f69aad972c..4b518e5f8ef1 100644
--- a/pkgs/development/python-modules/fastjsonschema/default.nix
+++ b/pkgs/development/python-modules/fastjsonschema/default.nix
@@ -42,7 +42,7 @@ buildPythonPackage rec {
       "remote ref"
       "definitions"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_compile_to_code_custom_format" # cannot import temporary module created during test
     ];
 
diff --git a/pkgs/development/python-modules/fasttext-predict/default.nix b/pkgs/development/python-modules/fasttext-predict/default.nix
index 6bfddc120c6f..bdd19640609e 100644
--- a/pkgs/development/python-modules/fasttext-predict/default.nix
+++ b/pkgs/development/python-modules/fasttext-predict/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
     hash = "sha256-rMbf09pCHvVYI9g/aq74+PcsuU2LezpmDz4b/w9vRyc=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace setup.py \
       --replace-fail "-flto" ""
   '';
diff --git a/pkgs/development/python-modules/ffcv/default.nix b/pkgs/development/python-modules/ffcv/default.nix
index 344c7257024a..447dbb8e0f24 100644
--- a/pkgs/development/python-modules/ffcv/default.nix
+++ b/pkgs/development/python-modules/ffcv/default.nix
@@ -111,6 +111,6 @@ buildPythonPackage rec {
     ];
     # OSError: dlopen(libc.so.6, 0x0006): tried: '/usr/lib/libc.so.6' (no such file, not in dyld cache),
     # 'libc.so.6' (no such file), '/usr/local/lib/libc.so.6' (no such file), '/usr/lib/libc.so.6' (no such file, not in dyld cache)
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/ffmpy/default.nix b/pkgs/development/python-modules/ffmpy/default.nix
index 00a8a73aadad..ec639f9ef821 100644
--- a/pkgs/development/python-modules/ffmpy/default.nix
+++ b/pkgs/development/python-modules/ffmpy/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
     go
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # expects a FFExecutableNotFoundError, gets a NotADirectoryError raised by os
     "test_invalid_executable_path"
   ];
diff --git a/pkgs/development/python-modules/finetuning-scheduler/default.nix b/pkgs/development/python-modules/finetuning-scheduler/default.nix
index 7d9cf816c7ba..808c8e1ab696 100644
--- a/pkgs/development/python-modules/finetuning-scheduler/default.nix
+++ b/pkgs/development/python-modules/finetuning-scheduler/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
       "test_fts_dynamo_resume"
       "test_fts_dynamo_intrafit"
     ]
-    ++ lib.optionals (stdenv.isAarch64 && stdenv.isLinux) [
+    ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
       # slightly exceeds numerical tolerance on aarch64-linux:
       "test_fts_frozen_bn_track_running_stats"
     ];
@@ -58,6 +58,6 @@ buildPythonPackage rec {
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ bcdarwin ];
     # "No module named 'torch._C._distributed_c10d'; 'torch._C' is not a package" at import time:
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/fipy/default.nix b/pkgs/development/python-modules/fipy/default.nix
index 17f148f39f7c..2be37738ebb1 100644
--- a/pkgs/development/python-modules/fipy/default.nix
+++ b/pkgs/development/python-modules/fipy/default.nix
@@ -45,9 +45,9 @@ buildPythonPackage rec {
     future
     scikit-fmm
     openssh
-  ] ++ lib.optionals (!stdenv.isDarwin) [ gmsh ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ gmsh ];
 
-  nativeCheckInputs = lib.optionals (!stdenv.isDarwin) [ gmsh ];
+  nativeCheckInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ gmsh ];
 
   # NOTE: Two of the doctests in fipy.matrices.scipyMatrix._ScipyMatrix.CSR fail, and there is no
   # clean way to disable them.
diff --git a/pkgs/development/python-modules/flask-caching/default.nix b/pkgs/development/python-modules/flask-caching/default.nix
index 0f733a1b9a38..29e997acdf9a 100644
--- a/pkgs/development/python-modules/flask-caching/default.nix
+++ b/pkgs/development/python-modules/flask-caching/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
       "Redis"
       "Memcache"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # ignore flaky test
       "test_cache_timeout_dynamic"
       "test_cached_view_class"
diff --git a/pkgs/development/python-modules/flask-restx/default.nix b/pkgs/development/python-modules/flask-restx/default.nix
index 55f41f6f7737..85f0218fd91b 100644
--- a/pkgs/development/python-modules/flask-restx/default.nix
+++ b/pkgs/development/python-modules/flask-restx/default.nix
@@ -65,7 +65,7 @@ buildPythonPackage rec {
       "--deselect=tests/test_inputs.py::EmailTest::test_valid_value_check"
       "--deselect=tests/test_logging.py::LoggingTest::test_override_app_level"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "--deselect=tests/test_inputs.py::EmailTest::test_invalid_values_check"
     ];
 
diff --git a/pkgs/development/python-modules/flask-testing/default.nix b/pkgs/development/python-modules/flask-testing/default.nix
index 6574dcf1613e..07d410fa1b17 100644
--- a/pkgs/development/python-modules/flask-testing/default.nix
+++ b/pkgs/development/python-modules/flask-testing/default.nix
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   ];
 
   # Some of the tests use localhost networking on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTests = [
     # RuntimeError and NotImplementedError
diff --git a/pkgs/development/python-modules/fonttools/default.nix b/pkgs/development/python-modules/fonttools/default.nix
index c57065ec64fb..6898f34cb133 100644
--- a/pkgs/development/python-modules/fonttools/default.nix
+++ b/pkgs/development/python-modules/fonttools/default.nix
@@ -61,7 +61,7 @@ buildPythonPackage rec {
         ];
         plot = [ matplotlib ];
         symfont = [ sympy ];
-        type1 = lib.optional stdenv.isDarwin xattr;
+        type1 = lib.optional stdenv.hostPlatform.isDarwin xattr;
         pathops = [ skia-pathops ];
         repacker = [ uharfbuzz ];
       };
diff --git a/pkgs/development/python-modules/foxdot/default.nix b/pkgs/development/python-modules/foxdot/default.nix
index af7edb24ae95..f9faef8be2bd 100644
--- a/pkgs/development/python-modules/foxdot/default.nix
+++ b/pkgs/development/python-modules/foxdot/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     [ tkinter ]
     # we currently build SuperCollider only on Linux
     # but FoxDot is totally usable on macOS with the official SuperCollider binary
-    ++ lib.optionals stdenv.isLinux [ supercollider ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ supercollider ];
 
   # Requires a running SuperCollider instance
   doCheck = false;
diff --git a/pkgs/development/python-modules/freud/default.nix b/pkgs/development/python-modules/freud/default.nix
index a681bd1f14b1..9fa555e28170 100644
--- a/pkgs/development/python-modules/freud/default.nix
+++ b/pkgs/development/python-modules/freud/default.nix
@@ -80,7 +80,7 @@ buildPythonPackage rec {
     matplotlib
     sympy
   ];
-  disabledTests = lib.optionals stdenv.isAarch64 [
+  disabledTests = lib.optionals stdenv.hostPlatform.isAarch64 [
     # https://github.com/glotzerlab/freud/issues/961
     "test_docstring"
   ];
diff --git a/pkgs/development/python-modules/frida-python/default.nix b/pkgs/development/python-modules/frida-python/default.nix
index d73e5645e517..8bef789110cf 100644
--- a/pkgs/development/python-modules/frida-python/default.nix
+++ b/pkgs/development/python-modules/frida-python/default.nix
@@ -47,7 +47,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ typing-extensions ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
diff --git a/pkgs/development/python-modules/fs/default.nix b/pkgs/development/python-modules/fs/default.nix
index 5941243645ef..e0c07195df49 100644
--- a/pkgs/development/python-modules/fs/default.nix
+++ b/pkgs/development/python-modules/fs/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
 
   disabledTests =
     [ "user_data_repr" ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # remove if https://github.com/PyFilesystem/pyfilesystem2/issues/430#issue-707878112 resolved
       "test_ftpfs"
     ]
diff --git a/pkgs/development/python-modules/fsspec/default.nix b/pkgs/development/python-modules/fsspec/default.nix
index e423f32d799e..832920986a39 100644
--- a/pkgs/development/python-modules/fsspec/default.nix
+++ b/pkgs/development/python-modules/fsspec/default.nix
@@ -110,7 +110,7 @@ buildPythonPackage rec {
       "test_urlpath_inference_errors"
       "test_mismatch"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # works locally on APFS, fails on hydra with AssertionError comparing timestamps
       # darwin hydra builder uses HFS+ and has only one second timestamp resolution
       # this two tests however, assume nanosecond resolution
diff --git a/pkgs/development/python-modules/funsor/default.nix b/pkgs/development/python-modules/funsor/default.nix
index 6afeeb9e4cda..dda85f2c798d 100644
--- a/pkgs/development/python-modules/funsor/default.nix
+++ b/pkgs/development/python-modules/funsor/default.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
       # TODO: Try to re-enable this test at next release
       "test_torch_save"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Failures related to JIT
       # RuntimeError: required keyword attribute 'Subgraph' has the wrong type
       "test_local_param_ok"
diff --git a/pkgs/development/python-modules/fuse-python/default.nix b/pkgs/development/python-modules/fuse-python/default.nix
index ddd6d394cd0c..35eab496d91b 100644
--- a/pkgs/development/python-modules/fuse-python/default.nix
+++ b/pkgs/development/python-modules/fuse-python/default.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "fuse" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Python bindings for FUSE";
     homepage = "https://github.com/libfuse/python-fuse";
     license = licenses.lgpl21;
diff --git a/pkgs/development/python-modules/fusepy/default.nix b/pkgs/development/python-modules/fusepy/default.nix
index 35718a54d635..6e33666d6951 100644
--- a/pkgs/development/python-modules/fusepy/default.nix
+++ b/pkgs/development/python-modules/fusepy/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
 
   # On macOS, users are expected to install macFUSE. This means fusepy should
   # be able to find libfuse in /usr/local/lib.
-  patchPhase = lib.optionalString (!stdenv.isDarwin) ''
+  patchPhase = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace fuse.py --replace \
       "find_library('fuse')" "'${pkgs.fuse}/lib/libfuse.so'"
   '';
diff --git a/pkgs/development/python-modules/gb-io/default.nix b/pkgs/development/python-modules/gb-io/default.nix
index 72504c986d2e..233d12f3eac6 100644
--- a/pkgs/development/python-modules/gb-io/default.nix
+++ b/pkgs/development/python-modules/gb-io/default.nix
@@ -42,7 +42,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "gb_io" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/althonos/gb-io.py";
     description = "Python interface to gb-io, a fast GenBank parser written in Rust";
     license = licenses.mit;
diff --git a/pkgs/development/python-modules/gbulb/default.nix b/pkgs/development/python-modules/gbulb/default.nix
index 8c4252e49029..7dd4d3a2c126 100644
--- a/pkgs/development/python-modules/gbulb/default.nix
+++ b/pkgs/development/python-modules/gbulb/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "gbulb" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "GLib implementation of PEP 3156";
     homepage = "https://github.com/beeware/gbulb";
     license = licenses.asl20;
diff --git a/pkgs/development/python-modules/geopandas/default.nix b/pkgs/development/python-modules/geopandas/default.nix
index e8e78f80acc6..6d24ef442e16 100644
--- a/pkgs/development/python-modules/geopandas/default.nix
+++ b/pkgs/development/python-modules/geopandas/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
     rtree
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     export HOME=$(mktemp -d);
diff --git a/pkgs/development/python-modules/geventhttpclient/default.nix b/pkgs/development/python-modules/geventhttpclient/default.nix
index 230d8f300e29..3e9c51c7dcd1 100644
--- a/pkgs/development/python-modules/geventhttpclient/default.nix
+++ b/pkgs/development/python-modules/geventhttpclient/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
   ];
 
   # lots of: [Errno 48] Address already in use: ('127.0.0.1', 54323)
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/glean-sdk/default.nix b/pkgs/development/python-modules/glean-sdk/default.nix
index 5dea3e473665..11b7157f4b12 100644
--- a/pkgs/development/python-modules/glean-sdk/default.nix
+++ b/pkgs/development/python-modules/glean-sdk/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "glean" ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Telemetry client libraries and are a part of the Glean project";
     homepage = "https://mozilla.github.io/glean/book/index.html";
     license = lib.licenses.mpl20;
diff --git a/pkgs/development/python-modules/glymur/default.nix b/pkgs/development/python-modules/glymur/default.nix
index f54ccc14df0c..b9a37779603c 100644
--- a/pkgs/development/python-modules/glymur/default.nix
+++ b/pkgs/development/python-modules/glymur/default.nix
@@ -37,12 +37,12 @@ buildPythonPackage rec {
     })
   ];
 
-  postPatch = lib.optionalString (!stdenv.isDarwin) ''
+  postPatch = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace glymur/lib/tiff.py \
         --replace-fail "glymur_config('c')" "ctypes.CDLL('${lib.getLib glibc}/lib/libc.so.6')"
   '';
 
-  __propagatedImpureHostDeps = lib.optional stdenv.isDarwin "/usr/lib/libc.dylib";
+  __propagatedImpureHostDeps = lib.optional stdenv.hostPlatform.isDarwin "/usr/lib/libc.dylib";
 
   build-system = [ setuptools ];
 
diff --git a/pkgs/development/python-modules/gmpy2/default.nix b/pkgs/development/python-modules/gmpy2/default.nix
index 58f4cc08f672..713cb42faef8 100644
--- a/pkgs/development/python-modules/gmpy2/default.nix
+++ b/pkgs/development/python-modules/gmpy2/default.nix
@@ -52,12 +52,12 @@ buildPythonPackage rec {
   ];
 
   disabledTests =
-    lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # issue with some overflow logic
       "test_mpz_to_bytes"
       "test_mpz_from_bytes"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # TypeError: mpq() requires numeric or string argument
       # not sure why it only fails on Darwin
       "test_mpq_from_Decimal"
diff --git a/pkgs/development/python-modules/google-auth-oauthlib/default.nix b/pkgs/development/python-modules/google-auth-oauthlib/default.nix
index 3f1b3a06d0d4..2d4e0bed73ac 100644
--- a/pkgs/development/python-modules/google-auth-oauthlib/default.nix
+++ b/pkgs/development/python-modules/google-auth-oauthlib/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
       # Flaky test. See https://github.com/NixOS/nixpkgs/issues/288424#issuecomment-1941609973.
       "test_run_local_server_occupied_port"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # This test fails if the hostname is not associated with an IP (e.g., in `/etc/hosts`).
       "test_run_local_server_bind_addr"
     ];
diff --git a/pkgs/development/python-modules/google-auth/default.nix b/pkgs/development/python-modules/google-auth/default.nix
index 5556429082f1..30ea8208ff8e 100644
--- a/pkgs/development/python-modules/google-auth/default.nix
+++ b/pkgs/development/python-modules/google-auth/default.nix
@@ -84,7 +84,7 @@ buildPythonPackage rec {
     "google.oauth2"
   ];
 
-  disabledTestPaths = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  disabledTestPaths = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     # Disable tests using pyOpenSSL as it does not build on M1 Macs
     "tests/transport/test__mtls_helper.py"
     "tests/transport/test_requests.py"
diff --git a/pkgs/development/python-modules/gpy/default.nix b/pkgs/development/python-modules/gpy/default.nix
index f0a7efc0005f..9bca05da8e5a 100644
--- a/pkgs/development/python-modules/gpy/default.nix
+++ b/pkgs/development/python-modules/gpy/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
     done
   '';
 
-  disabledTests = lib.optionals (stdenv.isDarwin && stdenv.hostPlatform.isx86_64) [
+  disabledTests = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # Rounding difference break comparison
     "TestGradientMultiOutputGPModel"
   ];
diff --git a/pkgs/development/python-modules/gradio/client.nix b/pkgs/development/python-modules/gradio/client.nix
index 327a242a6a21..d07f962b2668 100644
--- a/pkgs/development/python-modules/gradio/client.nix
+++ b/pkgs/development/python-modules/gradio/client.nix
@@ -92,7 +92,7 @@ buildPythonPackage rec {
     #"-x" "-W" "ignore" # uncomment for debugging help
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # flaky: OSError: Cannot find empty port in range: 7860-7959
     "test_layout_components_in_output"
     "test_layout_and_state_components_in_output"
diff --git a/pkgs/development/python-modules/gradio/default.nix b/pkgs/development/python-modules/gradio/default.nix
index f805f52cb106..68d0da3d5660 100644
--- a/pkgs/development/python-modules/gradio/default.nix
+++ b/pkgs/development/python-modules/gradio/default.nix
@@ -160,7 +160,7 @@ buildPythonPackage rec {
       export HOME=$TMPDIR
       cat ${./conftest-skip-network-errors.py} >> test/conftest.py
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # OSError: [Errno 24] Too many open files
       ulimit -n 4096
     '';
@@ -195,7 +195,7 @@ buildPythonPackage rec {
 
     # tests if pip and other tools are installed
     "test_get_executable_path"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # flaky on darwin (depend on port availability)
     "test_all_status_messages"
     "test_async_generators"
diff --git a/pkgs/development/python-modules/graphene-django/default.nix b/pkgs/development/python-modules/graphene-django/default.nix
index 254b2ae16a53..2ebc4dbfe9a2 100644
--- a/pkgs/development/python-modules/graphene-django/default.nix
+++ b/pkgs/development/python-modules/graphene-django/default.nix
@@ -69,7 +69,7 @@ buildPythonPackage rec {
       "test_should_multiplechoicefield_convert_to_list_of_enum"
       "test_perform_mutate_success_with_enum_choice_field"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # this test touches files in the "/" directory and fails in darwin sandbox
       "test_should_filepath_convert_string"
     ];
diff --git a/pkgs/development/python-modules/graphviz/default.nix b/pkgs/development/python-modules/graphviz/default.nix
index 2bf0cfe01c11..7ce60f9f06ff 100644
--- a/pkgs/development/python-modules/graphviz/default.nix
+++ b/pkgs/development/python-modules/graphviz/default.nix
@@ -63,7 +63,7 @@ buildPythonPackage rec {
   '';
 
   # Too many failures due to attempting to connect to com.apple.fonts daemon
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Simple Python interface for Graphviz";
diff --git a/pkgs/development/python-modules/greeclimate/default.nix b/pkgs/development/python-modules/greeclimate/default.nix
index 3970ef993cb5..50aa51e82e92 100644
--- a/pkgs/development/python-modules/greeclimate/default.nix
+++ b/pkgs/development/python-modules/greeclimate/default.nix
@@ -63,7 +63,7 @@ buildPythonPackage rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Discover, connect and control Gree based minisplit systems";
     homepage = "https://github.com/cmroche/greeclimate";
     changelog = "https://github.com/cmroche/greeclimate/blob/${src.rev}/CHANGELOG.md";
diff --git a/pkgs/development/python-modules/grpcio/default.nix b/pkgs/development/python-modules/grpcio/default.nix
index 44c591d783a2..5dc26d50be2b 100644
--- a/pkgs/development/python-modules/grpcio/default.nix
+++ b/pkgs/development/python-modules/grpcio/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
         GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS=1
       fi
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       unset AR
     '';
 
diff --git a/pkgs/development/python-modules/gssapi/default.nix b/pkgs/development/python-modules/gssapi/default.nix
index 08683996db8d..525cfa3208a6 100644
--- a/pkgs/development/python-modules/gssapi/default.nix
+++ b/pkgs/development/python-modules/gssapi/default.nix
@@ -53,10 +53,10 @@ buildPythonPackage rec {
 
   dependencies = [ decorator ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ GSS ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ GSS ];
 
   # k5test is marked as broken on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     k5test
diff --git a/pkgs/development/python-modules/gumath/default.nix b/pkgs/development/python-modules/gumath/default.nix
index 83b45412b0ff..f478acffb27e 100644
--- a/pkgs/development/python-modules/gumath/default.nix
+++ b/pkgs/development/python-modules/gumath/default.nix
@@ -50,7 +50,7 @@ buildPythonPackage {
                 'add_runtime_library_dirs = ["${libndtypes}/lib", "${libxnd}/lib", "${libgumath}/lib"]'
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath ${libgumath}/lib $out/${python.sitePackages}/gumath/_gumath.*.so
   '';
 
diff --git a/pkgs/development/python-modules/gymnasium/default.nix b/pkgs/development/python-modules/gymnasium/default.nix
index 5cb114c51490..d7642559e537 100644
--- a/pkgs/development/python-modules/gymnasium/default.nix
+++ b/pkgs/development/python-modules/gymnasium/default.nix
@@ -66,7 +66,7 @@ buildPythonPackage rec {
   # marked as broken and throws an error during evaluation if the package is evaluated anyway.
   # disabling checks on Darwin avoids this and allows the package to be built.
   # if jaxlib is ever fixed on Darwin, remove this.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTestPaths = [
     # mujoco is required for those tests but the mujoco python bindings are not packaged in nixpkgs.
diff --git a/pkgs/development/python-modules/gyp/default.nix b/pkgs/development/python-modules/gyp/default.nix
index ad9fb88eb7ba..b8d52cd944c4 100644
--- a/pkgs/development/python-modules/gyp/default.nix
+++ b/pkgs/development/python-modules/gyp/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage {
     hash = "sha256-LUlF2VhRnuDwJLdITgmXIQV/IuKdx1KXQkiPVHKrl4Q=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     ./no-darwin-cflags.patch
     ./no-xcode.patch
   ];
diff --git a/pkgs/development/python-modules/hfst/default.nix b/pkgs/development/python-modules/hfst/default.nix
index 06e2ed94bb03..37869ffad3e3 100644
--- a/pkgs/development/python-modules/hfst/default.nix
+++ b/pkgs/development/python-modules/hfst/default.nix
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   setupPyBuildFlags = [ "--inplace" ];
 
   # Find foma in Darwin tests
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH="${foma}/lib"
   '';
 
diff --git a/pkgs/development/python-modules/hidapi/default.nix b/pkgs/development/python-modules/hidapi/default.nix
index ee69705614c9..976961d2164b 100644
--- a/pkgs/development/python-modules/hidapi/default.nix
+++ b/pkgs/development/python-modules/hidapi/default.nix
@@ -20,14 +20,14 @@ buildPythonPackage rec {
     sha256 = "sha256-bA6XumsFmjCdUbSVqPDV77zqh1a2QNmLb2u5/e8kWKw=";
   };
 
-  nativeBuildInputs = [ cython_0 ] ++ lib.optionals stdenv.isDarwin [ xcbuild ];
+  nativeBuildInputs = [ cython_0 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   propagatedBuildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       libusb1
       udev
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         AppKit
@@ -37,7 +37,7 @@ buildPythonPackage rec {
     );
 
   # Fix the USB backend library lookup
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     libusb=${libusb1.dev}/include/libusb-1.0
     test -d $libusb || { echo "ERROR: $libusb doesn't exist, please update/fix this build expression."; exit 1; }
     sed -i -e "s|/usr/include/libusb-1.0|$libusb|" setup.py
diff --git a/pkgs/development/python-modules/httpie/default.nix b/pkgs/development/python-modules/httpie/default.nix
index 5370a1e87009..86b4e4e51224 100644
--- a/pkgs/development/python-modules/httpie/default.nix
+++ b/pkgs/development/python-modules/httpie/default.nix
@@ -102,7 +102,7 @@ buildPythonPackage rec {
       "test_binary_suppresses_when_not_terminal_but_pretty"
       "test_binary_included_and_correct_when_suitable"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Test is flaky
       "test_daemon_runner"
     ];
diff --git a/pkgs/development/python-modules/httplib2/default.nix b/pkgs/development/python-modules/httplib2/default.nix
index 67e38601cfa5..a6c3e42a5317 100644
--- a/pkgs/development/python-modules/httplib2/default.nix
+++ b/pkgs/development/python-modules/httplib2/default.nix
@@ -57,7 +57,7 @@ buildPythonPackage rec {
       "test_head_301"
       "test_303"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # fails with "ConnectionResetError: [Errno 54] Connection reset by peer"
       "test_connection_close"
       # fails with HTTP 408 Request Timeout, instead of expected 200 OK
diff --git a/pkgs/development/python-modules/httpx/default.nix b/pkgs/development/python-modules/httpx/default.nix
index 4d4c264ea015..eb91fa3fce1e 100644
--- a/pkgs/development/python-modules/httpx/default.nix
+++ b/pkgs/development/python-modules/httpx/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage rec {
   };
 
   # trustme uses pyopenssl
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64);
 
   nativeCheckInputs = [
     chardet
diff --git a/pkgs/development/python-modules/hupper/default.nix b/pkgs/development/python-modules/hupper/default.nix
index a7a6525e942d..ec9ccf3e65c8 100644
--- a/pkgs/development/python-modules/hupper/default.nix
+++ b/pkgs/development/python-modules/hupper/default.nix
@@ -19,7 +19,7 @@ buildPythonPackage rec {
 
   # FIXME: watchdog dependency is disabled on Darwin because of #31865, which causes very silent
   # segfaults in the testsuite that end up failing the tests in a background thread (in myapp)
-  nativeCheckInputs = [ pytestCheckHook ] ++ lib.optionals (!stdenv.isDarwin) [ watchdog ];
+  nativeCheckInputs = [ pytestCheckHook ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ watchdog ];
 
   disabledTestPaths = [
     # Doesn't work with an exported home, RuntimeError: timeout waiting for change to file=/build/tmpgfn145cx
diff --git a/pkgs/development/python-modules/ifcopenshell/default.nix b/pkgs/development/python-modules/ifcopenshell/default.nix
index 6e17149079cf..f9b1fb66ec20 100644
--- a/pkgs/development/python-modules/ifcopenshell/default.nix
+++ b/pkgs/development/python-modules/ifcopenshell/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Open source IFC library and geometry engine";
     homepage = "http://ifcopenshell.org/";
     license = licenses.lgpl3;
diff --git a/pkgs/development/python-modules/ignite/default.nix b/pkgs/development/python-modules/ignite/default.nix
index 8d6145d9ad84..26009c97d47e 100644
--- a/pkgs/development/python-modules/ignite/default.nix
+++ b/pkgs/development/python-modules/ignite/default.nix
@@ -97,6 +97,6 @@ buildPythonPackage rec {
     license = lib.licenses.bsd3;
     maintainers = [ lib.maintainers.bcdarwin ];
     # ModuleNotFoundError: No module named 'torch._C._distributed_c10d'; 'torch._C' is not a package
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/imagecodecs-lite/default.nix b/pkgs/development/python-modules/imagecodecs-lite/default.nix
index cca83672a31d..5bca6d350d59 100644
--- a/pkgs/development/python-modules/imagecodecs-lite/default.nix
+++ b/pkgs/development/python-modules/imagecodecs-lite/default.nix
@@ -29,7 +29,7 @@ buildPythonPackage rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "Block-oriented, in-memory buffer transformation, compression, and decompression functions";
     homepage = "https://www.lfd.uci.edu/~gohlke/";
     maintainers = [ maintainers.tbenst ];
diff --git a/pkgs/development/python-modules/imageio/default.nix b/pkgs/development/python-modules/imageio/default.nix
index 145d08730fe4..47018744c6b4 100644
--- a/pkgs/development/python-modules/imageio/default.nix
+++ b/pkgs/development/python-modules/imageio/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
     hash = "sha256-WeoZE2TPBAhzBBcZNQqoiqvribMCLSZWk/XpdMydvCQ=";
   };
 
-  patches = lib.optionals (!stdenv.isDarwin) [
+  patches = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     (substituteAll {
       src = ./libgl-path.patch;
       libgl = "${libGL.out}/lib/libGL${stdenv.hostPlatform.extensions.sharedLibrary}";
@@ -100,7 +100,7 @@ buildPythonPackage rec {
     "tests/test_swf.py"
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # Segmentation fault
     "test_bayer_write"
     # RuntimeError: No valid H.264 encoder was found with the ffmpeg installation
diff --git a/pkgs/development/python-modules/img2pdf/default.nix b/pkgs/development/python-modules/img2pdf/default.nix
index 1a887a87d29b..afb95dafebd6 100644
--- a/pkgs/development/python-modules/img2pdf/default.nix
+++ b/pkgs/development/python-modules/img2pdf/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
     (substituteAll {
       src = ./default-icc-profile.patch;
       srgbProfile =
-        if stdenv.isDarwin then
+        if stdenv.hostPlatform.isDarwin then
           "/System/Library/ColorSync/Profiles/sRGB Profile.icc"
         else
           # break runtime dependency chain all of colord dependencies
@@ -65,7 +65,7 @@ buildPythonPackage rec {
 
   # FIXME: Only add "sRGB Profile.icc" to __impureHostDeps once
   # https://github.com/NixOS/nix/issues/9301 is fixed.
-  __impureHostDeps = lib.optionals stdenv.isDarwin [ "/System/Library/ColorSync/Profiles" ];
+  __impureHostDeps = lib.optionals stdenv.hostPlatform.isDarwin [ "/System/Library/ColorSync/Profiles" ];
 
   nativeCheckInputs = [
     exiftool
diff --git a/pkgs/development/python-modules/inkex/default.nix b/pkgs/development/python-modules/inkex/default.nix
index c796a0136953..2435c7e46786 100644
--- a/pkgs/development/python-modules/inkex/default.nix
+++ b/pkgs/development/python-modules/inkex/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage {
       "test_extract_multiple"
       "test_lookup_and"
     ]
-    ++ lib.optional stdenv.isDarwin [
+    ++ lib.optional stdenv.hostPlatform.isDarwin [
       "test_image_extract"
       "test_path_number_nodes"
       "test_plotter" # Hangs
diff --git a/pkgs/development/python-modules/intake/default.nix b/pkgs/development/python-modules/intake/default.nix
index 80907730ffcf..2b1fefe90750 100644
--- a/pkgs/development/python-modules/intake/default.nix
+++ b/pkgs/development/python-modules/intake/default.nix
@@ -124,7 +124,7 @@ buildPythonPackage rec {
       # Timing-based, flaky on darwin and possibly others
       "test_idle_timer"
     ]
-    ++ lib.optionals (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13")
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13")
       [
         # Flaky with older low-res mtime on darwin < 10.13 (#143987)
         "test_second_load_timestamp"
diff --git a/pkgs/development/python-modules/invisible-watermark/default.nix b/pkgs/development/python-modules/invisible-watermark/default.nix
index 968669ec92bc..67652922d62a 100644
--- a/pkgs/development/python-modules/invisible-watermark/default.nix
+++ b/pkgs/development/python-modules/invisible-watermark/default.nix
@@ -72,7 +72,7 @@ buildPythonPackage rec {
         let
           testName = "${if withOnnx then "withOnnx" else "withoutOnnx"}-${method}";
           # This test fails in the sandbox on aarch64-linux, see https://github.com/microsoft/onnxruntime/issues/10038
-          skipTest = stdenv.isLinux && stdenv.isAarch64 && withOnnx && method == "rivaGan";
+          skipTest = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64 && withOnnx && method == "rivaGan";
         in
         lib.optionalAttrs (!skipTest) {
           "${testName}" = callPackage ./tests/cli.nix {
diff --git a/pkgs/development/python-modules/ipwhois/default.nix b/pkgs/development/python-modules/ipwhois/default.nix
index bd69e5ccd514..ea8fa078833d 100644
--- a/pkgs/development/python-modules/ipwhois/default.nix
+++ b/pkgs/development/python-modules/ipwhois/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "ipwhois" ];
 
-  preCheck = lib.optionalString stdenv.isLinux ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isLinux ''
     echo "nameserver 127.0.0.1" > resolv.conf
     export NIX_REDIRECTS=/etc/protocols=${iana-etc}/etc/protocols:/etc/resolv.conf=$(realpath resolv.conf) \
       LD_PRELOAD=${libredirect}/lib/libredirect.so
diff --git a/pkgs/development/python-modules/ipykernel/default.nix b/pkgs/development/python-modules/ipykernel/default.nix
index dabad2fa8e13..4da948088c9a 100644
--- a/pkgs/development/python-modules/ipykernel/default.nix
+++ b/pkgs/development/python-modules/ipykernel/default.nix
@@ -52,7 +52,7 @@ buildPythonPackage rec {
     pyzmq
     tornado
     traitlets
-  ] ++ lib.optionals stdenv.isDarwin [ appnope ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ appnope ];
 
   # check in passthru.tests.pytest to escape infinite recursion with ipyparallel
   doCheck = false;
diff --git a/pkgs/development/python-modules/ipykernel/tests.nix b/pkgs/development/python-modules/ipykernel/tests.nix
index 4d96d4c6787d..89ac0be2d3d6 100644
--- a/pkgs/development/python-modules/ipykernel/tests.nix
+++ b/pkgs/development/python-modules/ipykernel/tests.nix
@@ -46,7 +46,7 @@ buildPythonPackage {
       # traitlets.config.configurable.MultipleInstanceError: An incompatible siblin...
       "test_install_kernelspec"
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       [
         # see https://github.com/NixOS/nixpkgs/issues/76197
         "test_subprocess_print"
diff --git a/pkgs/development/python-modules/ipython/default.nix b/pkgs/development/python-modules/ipython/default.nix
index e13f14a2411e..077ea0e4ac10 100644
--- a/pkgs/development/python-modules/ipython/default.nix
+++ b/pkgs/development/python-modules/ipython/default.nix
@@ -102,7 +102,7 @@ buildPythonPackage rec {
       # UnboundLocalError: local variable 'child' referenced before assignment
       "test_system_interrupt"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # FileNotFoundError: [Errno 2] No such file or directory: 'pbpaste'
       "test_clipboard_get"
     ];
diff --git a/pkgs/development/python-modules/jaraco-net/default.nix b/pkgs/development/python-modules/jaraco-net/default.nix
index c5554812cbe8..de22f3eda857 100644
--- a/pkgs/development/python-modules/jaraco-net/default.nix
+++ b/pkgs/development/python-modules/jaraco-net/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage rec {
     python-dateutil
     pathvalidate
     jsonpickle
-  ] ++ lib.optionals stdenv.isDarwin [ ifconfig-parser ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ ifconfig-parser ];
 
   pythonImportsCheck = [ "jaraco.net" ];
 
@@ -78,7 +78,7 @@ buildPythonPackage rec {
     importlib-resources
     pyparsing
     requests-mock
-  ] ++ lib.optionals stdenv.isDarwin [ nettools ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ nettools ];
 
   disabledTestPaths = [
     # doesn't actually contain tests
diff --git a/pkgs/development/python-modules/jaraco-path/default.nix b/pkgs/development/python-modules/jaraco-path/default.nix
index 5537811d592d..48ee8b4fdd2b 100644
--- a/pkgs/development/python-modules/jaraco-path/default.nix
+++ b/pkgs/development/python-modules/jaraco-path/default.nix
@@ -31,6 +31,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/jaraco/jaraco.path";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ dotlambda ];
-    broken = stdenv.isDarwin; # pyobjc is missing
+    broken = stdenv.hostPlatform.isDarwin; # pyobjc is missing
   };
 }
diff --git a/pkgs/development/python-modules/jax/default.nix b/pkgs/development/python-modules/jax/default.nix
index ec8c53daab46..ba9a621b1eab 100644
--- a/pkgs/development/python-modules/jax/default.nix
+++ b/pkgs/development/python-modules/jax/default.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
   # PermissionError: [Errno 13] Permission denied: '/tmp/back_compat_testdata/test_*.py'
   # See https://github.com/google/jax/blob/jaxlib-v0.4.27/jax/_src/internal_test_util/export_back_compat_test_util.py#L240-L241
   # NOTE: this doesn't seem to be an issue on linux
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export TEST_UNDECLARED_OUTPUTS_DIR=$(mktemp -d)
   '';
 
@@ -108,7 +108,7 @@ buildPythonPackage rec {
       "test_custom_root_with_aux"
       "testEigvalsGrad_shape"
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       # See https://github.com/google/jax/issues/14793.
       "test_for_loop_fixpoint_correctly_identifies_loop_varying_residuals_unrolled_for_loop"
       "testQdwhWithRandomMatrix3"
@@ -131,7 +131,7 @@ buildPythonPackage rec {
     # Segmentation fault. See https://gist.github.com/zimbatm/e9b61891f3bcf5e4aaefd13f94344fba
     "tests/linalg_test.py"
   ]
-  ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     # RuntimeWarning: invalid value encountered in cast
     "tests/lax_test.py"
   ];
diff --git a/pkgs/development/python-modules/jaxlib/bin.nix b/pkgs/development/python-modules/jaxlib/bin.nix
index 3104cee90e1c..a08264849770 100644
--- a/pkgs/development/python-modules/jaxlib/bin.nix
+++ b/pkgs/development/python-modules/jaxlib/bin.nix
@@ -186,7 +186,7 @@ buildPythonPackage {
   # Prebuilt wheels are dynamically linked against things that nix can't find.
   # Run `autoPatchelfHook` to automagically fix them.
   nativeBuildInputs =
-    lib.optionals stdenv.isLinux [ autoPatchelfHook ]
+    lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ]
     ++ lib.optionals cudaSupport [ autoAddDriverRunpath ];
   # Dynamic link dependencies
   buildInputs = [ stdenv.cc.cc.lib ];
@@ -238,12 +238,12 @@ buildPythonPackage {
     broken =
       !(cudaSupport -> lib.versionAtLeast cudaVersion "11.1")
       || !(cudaSupport -> lib.versionAtLeast cudaPackages.cudnn.version "8.2")
-      || !(cudaSupport -> stdenv.isLinux)
+      || !(cudaSupport -> stdenv.hostPlatform.isLinux)
       || !(cudaSupport -> (gpuSrcs ? "cuda${cudaVersion}-${pythonVersion}"))
       # Fails at pythonImportsCheckPhase:
       # ...-python-imports-check-hook.sh/nix-support/setup-hook: line 10: 28017 Illegal instruction: 4
       # /nix/store/5qpssbvkzfh73xih07xgmpkj5r565975-python3-3.11.9/bin/python3.11 -c
       # 'import os; import importlib; list(map(lambda mod: importlib.import_module(mod), os.environ["pythonImportsCheck"].split()))'
-      || (stdenv.isDarwin && stdenv.isx86_64);
+      || (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64);
   };
 }
diff --git a/pkgs/development/python-modules/jaxlib/default.nix b/pkgs/development/python-modules/jaxlib/default.nix
index 0fc50fa9243f..de7fea0a26e8 100644
--- a/pkgs/development/python-modules/jaxlib/default.nix
+++ b/pkgs/development/python-modules/jaxlib/default.nix
@@ -240,7 +240,7 @@ let
       wheel
       build
       which
-    ] ++ lib.optionals effectiveStdenv.isDarwin [ cctools ];
+    ] ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [ cctools ];
 
     buildInputs =
       [
@@ -259,8 +259,8 @@ let
         snappy
         zlib
       ]
-      ++ lib.optionals effectiveStdenv.isDarwin [ IOKit ]
-      ++ lib.optionals (!effectiveStdenv.isDarwin) [ nsync ];
+      ++ lib.optionals effectiveStdenv.hostPlatform.isDarwin [ IOKit ]
+      ++ lib.optionals (!effectiveStdenv.hostPlatform.isDarwin) [ nsync ];
 
     # We don't want to be quite so picky regarding bazel version
     postPatch = ''
@@ -406,7 +406,7 @@ let
 
       TF_SYSTEM_LIBS = lib.concatStringsSep "," (
         tf_system_libs
-        ++ lib.optionals (!effectiveStdenv.isDarwin) [
+        ++ lib.optionals (!effectiveStdenv.hostPlatform.isDarwin) [
           "nsync" # fails to build on darwin
         ]
       );
@@ -414,7 +414,7 @@ let
       # Note: we cannot do most of this patching at `patch` phase as the deps
       # are not available yet. Framework search paths aren't added by bintools
       # hook. See https://github.com/NixOS/nixpkgs/pull/41914.
-      preBuild = lib.optionalString effectiveStdenv.isDarwin ''
+      preBuild = lib.optionalString effectiveStdenv.hostPlatform.isDarwin ''
         export NIX_LDFLAGS+=" -F${IOKit}/Library/Frameworks"
         substituteInPlace ../output/external/rules_cc/cc/private/toolchain/osx_cc_wrapper.sh.tpl \
           --replace "/usr/bin/install_name_tool" "${cctools}/bin/install_name_tool"
diff --git a/pkgs/development/python-modules/jaxopt/default.nix b/pkgs/development/python-modules/jaxopt/default.nix
index 8159533fc203..b617e21c1c27 100644
--- a/pkgs/development/python-modules/jaxopt/default.nix
+++ b/pkgs/development/python-modules/jaxopt/default.nix
@@ -75,7 +75,7 @@ buildPythonPackage rec {
       # https://github.com/google/jaxopt/issues/592
       "test_solve_sparse"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # https://github.com/google/jaxopt/issues/577
       "test_binary_logit_log_likelihood"
       "test_solve_sparse"
@@ -87,7 +87,7 @@ buildPythonPackage rec {
       # AssertionError: Array(0.01411963, dtype=float32) not less than or equal to 0.01
       "test_multiclass_logreg6"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Fatal Python error: Aborted
       "test_dtype_consistency"
 
diff --git a/pkgs/development/python-modules/jedi-language-server/default.nix b/pkgs/development/python-modules/jedi-language-server/default.nix
index 096c327ae986..e67d04be02c1 100644
--- a/pkgs/development/python-modules/jedi-language-server/default.nix
+++ b/pkgs/development/python-modules/jedi-language-server/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
     HOME="$(mktemp -d)"
   '';
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # https://github.com/pappasam/jedi-language-server/issues/313
     "test_publish_diagnostics_on_change"
     "test_publish_diagnostics_on_save"
diff --git a/pkgs/development/python-modules/jedi/default.nix b/pkgs/development/python-modules/jedi/default.nix
index ddc0caea5555..b88dc9311e91 100644
--- a/pkgs/development/python-modules/jedi/default.nix
+++ b/pkgs/development/python-modules/jedi/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
       # sensitive to platform, causes false negatives on darwin
       "test_import"
     ]
-    ++ lib.optionals (stdenv.isAarch64 && pythonOlder "3.9") [
+    ++ lib.optionals (stdenv.hostPlatform.isAarch64 && pythonOlder "3.9") [
       # AssertionError: assert 'foo' in ['setup']
       "test_init_extension_module"
     ]
diff --git a/pkgs/development/python-modules/jellyfish/default.nix b/pkgs/development/python-modules/jellyfish/default.nix
index 4210f5499d28..8517c239de44 100644
--- a/pkgs/development/python-modules/jellyfish/default.nix
+++ b/pkgs/development/python-modules/jellyfish/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
     cargoSetupHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   cargoDeps = rustPlatform.fetchCargoTarball {
     inherit src;
diff --git a/pkgs/development/python-modules/jinja2/default.nix b/pkgs/development/python-modules/jinja2/default.nix
index da220641dbe2..ee1d27671b5d 100644
--- a/pkgs/development/python-modules/jinja2/default.nix
+++ b/pkgs/development/python-modules/jinja2/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
 
   # Multiple tests run out of stack space on 32bit systems with python2.
   # See https://github.com/pallets/jinja/issues/1158
-  doCheck = !stdenv.is32bit;
+  doCheck = !stdenv.hostPlatform.is32bit;
 
   nativeCheckInputs = [ pytestCheckHook ] ++ passthru.optional-dependencies.i18n;
 
diff --git a/pkgs/development/python-modules/joblib/default.nix b/pkgs/development/python-modules/joblib/default.nix
index 65b728b34e9a..0cd4182d4241 100644
--- a/pkgs/development/python-modules/joblib/default.nix
+++ b/pkgs/development/python-modules/joblib/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
       "test_parallel_call_cached_function_defined_in_jupyter" # jupyter not available during tests
       "test_nested_parallel_warnings" # tests is flaky under load
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_dispatch_multiprocessing" # test_dispatch_multiprocessing is broken only on Darwin.
     ]
     ++ lib.optionals (pythonAtLeast "3.12") [
diff --git a/pkgs/development/python-modules/johnnycanencrypt/default.nix b/pkgs/development/python-modules/johnnycanencrypt/default.nix
index 19d02b118987..a9d7009e07e9 100644
--- a/pkgs/development/python-modules/johnnycanencrypt/default.nix
+++ b/pkgs/development/python-modules/johnnycanencrypt/default.nix
@@ -47,8 +47,8 @@ buildPythonPackage rec {
 
   buildInputs =
     [ nettle ]
-    ++ lib.optionals stdenv.isLinux [ pcsclite ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pcsclite ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       PCSC
       libiconv
     ];
diff --git a/pkgs/development/python-modules/json-stream-rs-tokenizer/default.nix b/pkgs/development/python-modules/json-stream-rs-tokenizer/default.nix
index 9a65903e384d..86473e609bfe 100644
--- a/pkgs/development/python-modules/json-stream-rs-tokenizer/default.nix
+++ b/pkgs/development/python-modules/json-stream-rs-tokenizer/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
     wheel
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # Tests depend on json-stream, which depends on this package.
   # To avoid infinite recursion, we only enable tests when building passthru.tests.
diff --git a/pkgs/development/python-modules/json-stream/default.nix b/pkgs/development/python-modules/json-stream/default.nix
index 26b7ef5f8ea2..fd5f61399f18 100644
--- a/pkgs/development/python-modules/json-stream/default.nix
+++ b/pkgs/development/python-modules/json-stream/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ setuptools ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ iconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ iconv ];
 
   propagatedBuildInputs = [
     requests
diff --git a/pkgs/development/python-modules/jsonstreams/default.nix b/pkgs/development/python-modules/jsonstreams/default.nix
index 58c3513e1ee0..49ffcee24b82 100644
--- a/pkgs/development/python-modules/jsonstreams/default.nix
+++ b/pkgs/development/python-modules/jsonstreams/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   pytestFlagsArray = [ "tests --doctest-modules jsonstreams" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "JSON streaming writer";
     homepage = "https://github.com/dcbaker/jsonstreams";
     license = licenses.mit;
diff --git a/pkgs/development/python-modules/jupyter-server/default.nix b/pkgs/development/python-modules/jupyter-server/default.nix
index a367bc3c0f35..071b3707225b 100644
--- a/pkgs/development/python-modules/jupyter-server/default.nix
+++ b/pkgs/development/python-modules/jupyter-server/default.nix
@@ -72,7 +72,7 @@ buildPythonPackage rec {
   ];
 
   # https://github.com/NixOS/nixpkgs/issues/299427
-  stripExclude = lib.optionals stdenv.isDarwin [ "favicon.ico" ];
+  stripExclude = lib.optionals stdenv.hostPlatform.isDarwin [ "favicon.ico" ];
 
   nativeCheckInputs = [
     ipykernel
@@ -102,13 +102,13 @@ buildPythonPackage rec {
       # test is presumable broken in sandbox
       "test_authorized_requests"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # attempts to use trashcan, build env doesn't allow this
       "test_delete"
       # Insufficient access privileges for operation
       "test_regression_is_hidden"
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       # Failed: DID NOT RAISE <class 'tornado.web.HTTPError'>
       "test_copy_big_dir"
     ];
diff --git a/pkgs/development/python-modules/jupyterhub/default.nix b/pkgs/development/python-modules/jupyterhub/default.nix
index 38a2fc97a662..76fbe01ae3d1 100644
--- a/pkgs/development/python-modules/jupyterhub/default.nix
+++ b/pkgs/development/python-modules/jupyterhub/default.nix
@@ -171,6 +171,6 @@ buildPythonPackage rec {
     license = licenses.bsd3;
     maintainers = teams.jupyter.members;
     # darwin: E   OSError: dlopen(/nix/store/43zml0mlr17r5jsagxr00xxx91hz9lky-openpam-20170430/lib/libpam.so, 6): image not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/jupytext/default.nix b/pkgs/development/python-modules/jupytext/default.nix
index 4708b5363141..df0fc676633f 100644
--- a/pkgs/development/python-modules/jupytext/default.nix
+++ b/pkgs/development/python-modules/jupytext/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
 
   disabledTestPaths = [ "tests/external" ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # requires access to trash
     "test_load_save_rename"
   ];
diff --git a/pkgs/development/python-modules/kaleido/default.nix b/pkgs/development/python-modules/kaleido/default.nix
index 9e9fff6af84d..ef889a0aa715 100644
--- a/pkgs/development/python-modules/kaleido/default.nix
+++ b/pkgs/development/python-modules/kaleido/default.nix
@@ -97,7 +97,7 @@ buildPythonPackage rec {
     #ln -s ${lato}/share/fonts/lato/* $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/lato/
   '';
 
-  passthru.tests = lib.optionalAttrs (!stdenv.isDarwin) {
+  passthru.tests = lib.optionalAttrs (!stdenv.hostPlatform.isDarwin) {
     kaleido = callPackage ./tests.nix { };
   };
 
diff --git a/pkgs/development/python-modules/keyring/default.nix b/pkgs/development/python-modules/keyring/default.nix
index d16fa7232c2c..45166fb322b2 100644
--- a/pkgs/development/python-modules/keyring/default.nix
+++ b/pkgs/development/python-modules/keyring/default.nix
@@ -43,7 +43,7 @@ buildPythonPackage rec {
       jaraco-context
       jaraco-functools
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       jeepney
       secretstorage
     ]
@@ -68,7 +68,7 @@ buildPythonPackage rec {
   disabledTestPaths =
     [ "tests/backends/test_macOS.py" ]
     # These tests fail when sandboxing is enabled because they are unable to get a password from keychain.
-    ++ lib.optional stdenv.isDarwin "tests/test_multiprocess.py";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "tests/test_multiprocess.py";
 
   meta = with lib; {
     description = "Store and access your passwords safely";
diff --git a/pkgs/development/python-modules/keyring_24/default.nix b/pkgs/development/python-modules/keyring_24/default.nix
index 9739a6f7b20a..05fbb3178147 100644
--- a/pkgs/development/python-modules/keyring_24/default.nix
+++ b/pkgs/development/python-modules/keyring_24/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
       jaraco-context
       jaraco-functools
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       jeepney
       secretstorage
     ]
@@ -68,7 +68,7 @@ buildPythonPackage rec {
   disabledTestPaths =
     [ "tests/backends/test_macOS.py" ]
     # These tests fail when sandboxing is enabled because they are unable to get a password from keychain.
-    ++ lib.optional stdenv.isDarwin "tests/test_multiprocess.py";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "tests/test_multiprocess.py";
 
   meta = with lib; {
     description = "Store and access your passwords safely";
diff --git a/pkgs/development/python-modules/keystone-engine/default.nix b/pkgs/development/python-modules/keystone-engine/default.nix
index 61e27473ec98..4e526346dced 100644
--- a/pkgs/development/python-modules/keystone-engine/default.nix
+++ b/pkgs/development/python-modules/keystone-engine/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
     sha256 = "1xahdr6bh3dw5swrc2r8kqa8ljhqlb7k2kxv5mrw5rhcmcnzcyig";
   };
 
-  setupPyBuildFlags = lib.optionals stdenv.isLinux [
+  setupPyBuildFlags = lib.optionals stdenv.hostPlatform.isLinux [
     "--plat-name"
     "linux"
   ];
diff --git a/pkgs/development/python-modules/kivy/default.nix b/pkgs/development/python-modules/kivy/default.nix
index f71c8288c74e..26a1bba38bce 100644
--- a/pkgs/development/python-modules/kivy/default.nix
+++ b/pkgs/development/python-modules/kivy/default.nix
@@ -49,11 +49,11 @@ buildPythonPackage rec {
       SDL2_ttf
       SDL2_mixer
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       mesa
       mtdev
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Accelerate
       ApplicationServices
       AVFoundation
@@ -84,9 +84,9 @@ buildPythonPackage rec {
   # prefer pkg-config over hardcoded framework paths
   USE_OSX_FRAMEWORKS = 0;
   # work around python distutils compiling C++ with $CC (see issue #26709)
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace kivy/lib/mtdev.py \
       --replace "LoadLibrary('libmtdev.so.1')" "LoadLibrary('${mtdev}/lib/libmtdev.so.1')"
   '';
diff --git a/pkgs/development/python-modules/kiwisolver/default.nix b/pkgs/development/python-modules/kiwisolver/default.nix
index d71b613b58b8..24322524eb93 100644
--- a/pkgs/development/python-modules/kiwisolver/default.nix
+++ b/pkgs/development/python-modules/kiwisolver/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     hash = "sha256-5X5WOlf7IqFC2jTziswvwaXIZLwpyhUXqIq8lj5g1uw=";
   };
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   nativeBuildInputs = [ setuptools-scm ];
 
diff --git a/pkgs/development/python-modules/krb5/default.nix b/pkgs/development/python-modules/krb5/default.nix
index f64b73447ac0..42c4537bff42 100644
--- a/pkgs/development/python-modules/krb5/default.nix
+++ b/pkgs/development/python-modules/krb5/default.nix
@@ -43,6 +43,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/jborean93/pykrb5";
     license = licenses.mit;
     maintainers = teams.deshaw.members;
-    broken = stdenv.isDarwin; # TODO: figure out how to build on Darwin
+    broken = stdenv.hostPlatform.isDarwin; # TODO: figure out how to build on Darwin
   };
 }
diff --git a/pkgs/development/python-modules/kubernetes/default.nix b/pkgs/development/python-modules/kubernetes/default.nix
index b7387675c954..66a295dcc5a7 100644
--- a/pkgs/development/python-modules/kubernetes/default.nix
+++ b/pkgs/development/python-modules/kubernetes/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ] ++ lib.flatten (builtins.attrValues optional-dependencies);
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # AssertionError: <class 'urllib3.poolmanager.ProxyManager'> != <class 'urllib3.poolmanager.Poolmanager'>
     "test_rest_proxycare"
   ];
diff --git a/pkgs/development/python-modules/lancedb/default.nix b/pkgs/development/python-modules/lancedb/default.nix
index bf2f407be877..e1dcbd2a1a22 100644
--- a/pkgs/development/python-modules/lancedb/default.nix
+++ b/pkgs/development/python-modules/lancedb/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
       libiconv
       protobuf
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         IOKit
diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index a29bf68137a1..0c3564d0f113 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -118,7 +118,7 @@ buildPythonPackage rec {
       "test_chat_prompt_template_variable_names"
       "test_create_model_v2"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Langchain-core the following tests due to the test comparing execution time with magic values.
       "test_queue_for_streaming_via_sync_call"
       "test_same_event_loop"
diff --git a/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix b/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix
index adcd0856f027..7d511994b6d5 100644
--- a/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix
+++ b/pkgs/development/python-modules/langgraph-checkpoint-postgres/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
 
   pythonRelaxDeps = [ "psycopg-pool" ];
 
-  doCheck = !(stdenvNoCC.isDarwin);
+  doCheck = !(stdenvNoCC.hostPlatform.isDarwin);
 
   pythonImportsCheck = [ "langgraph.checkpoint.postgres" ];
 
diff --git a/pkgs/development/python-modules/langgraph/default.nix b/pkgs/development/python-modules/langgraph/default.nix
index 80e2faa68258..087db330d195 100644
--- a/pkgs/development/python-modules/langgraph/default.nix
+++ b/pkgs/development/python-modules/langgraph/default.nix
@@ -64,7 +64,7 @@ buildPythonPackage rec {
 
   # postgresql doesn't play nicely with the darwin sandbox:
   # FATAL:  could not create shared memory segment: Operation not permitted
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     aiosqlite
diff --git a/pkgs/development/python-modules/langsmith/default.nix b/pkgs/development/python-modules/langsmith/default.nix
index f7bd15615c85..5ce0f9c33367 100644
--- a/pkgs/development/python-modules/langsmith/default.nix
+++ b/pkgs/development/python-modules/langsmith/default.nix
@@ -59,7 +59,7 @@ buildPythonPackage rec {
     pytest-asyncio
     pytestCheckHook
     uvicorn
-  ] ++ lib.optionals stdenv.isLinux [ attr ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ attr ];
 
   disabledTests = [
     # These tests require network access
diff --git a/pkgs/development/python-modules/ledgerblue/default.nix b/pkgs/development/python-modules/ledgerblue/default.nix
index 5010d8153032..4885fa14524e 100644
--- a/pkgs/development/python-modules/ledgerblue/default.nix
+++ b/pkgs/development/python-modules/ledgerblue/default.nix
@@ -53,7 +53,7 @@ buildPythonPackage rec {
     python-gnupg
     python-u2flib-host
     websocket-client
-  ] ++ lib.optionals stdenv.isLinux [ bleak ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ bleak ];
 
   # No tests
   doCheck = false;
diff --git a/pkgs/development/python-modules/ledgerwallet/default.nix b/pkgs/development/python-modules/ledgerwallet/default.nix
index 8afa1ea14cb5..0cbc048ee670 100644
--- a/pkgs/development/python-modules/ledgerwallet/default.nix
+++ b/pkgs/development/python-modules/ledgerwallet/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   buildInputs = [
     setuptools
     setuptools-scm
-  ] ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
   propagatedBuildInputs = [
     cryptography
     click
diff --git a/pkgs/development/python-modules/libasyncns/default.nix b/pkgs/development/python-modules/libasyncns/default.nix
index 730d1a9217d5..b81e67f8f926 100644
--- a/pkgs/development/python-modules/libasyncns/default.nix
+++ b/pkgs/development/python-modules/libasyncns/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   patches = [ ./libasyncns-fix-res-consts.patch ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace resquery.c \
       --replace '<arpa/nameser.h>' '<arpa/nameser_compat.h>'
   '';
diff --git a/pkgs/development/python-modules/libcst/default.nix b/pkgs/development/python-modules/libcst/default.nix
index a0863f9bfd1c..3ccf4c8e12fb 100644
--- a/pkgs/development/python-modules/libcst/default.nix
+++ b/pkgs/development/python-modules/libcst/default.nix
@@ -55,7 +55,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   dependencies = [
     typing-extensions
diff --git a/pkgs/development/python-modules/librosa/default.nix b/pkgs/development/python-modules/librosa/default.nix
index 9b015e335b75..fa0c17487d33 100644
--- a/pkgs/development/python-modules/librosa/default.nix
+++ b/pkgs/development/python-modules/librosa/default.nix
@@ -106,7 +106,7 @@ buildPythonPackage rec {
       "test_cite_badversion"
       "test_cite_unreleased"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # crashing the python interpreter
       "test_unknown_time_unit"
       "test_unknown_wavaxis"
diff --git a/pkgs/development/python-modules/libtmux/default.nix b/pkgs/development/python-modules/libtmux/default.nix
index 0bb5cb5cda28..917b20ef077f 100644
--- a/pkgs/development/python-modules/libtmux/default.nix
+++ b/pkgs/development/python-modules/libtmux/default.nix
@@ -47,12 +47,12 @@ buildPythonPackage rec {
       # Assertion error
       "test_capture_pane_start"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # tests/test_pane.py:113: AssertionError
       "test_capture_pane_start"
     ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     "tests/test_test.py"
   ];
 
diff --git a/pkgs/development/python-modules/lightgbm/default.nix b/pkgs/development/python-modules/lightgbm/default.nix
index 6e07d603b1b4..5c52a7350741 100644
--- a/pkgs/development/python-modules/lightgbm/default.nix
+++ b/pkgs/development/python-modules/lightgbm/default.nix
@@ -29,7 +29,7 @@
   boost,
   ocl-icd,
   opencl-headers,
-  gpuSupport ? stdenv.isLinux && !cudaSupport,
+  gpuSupport ? stdenv.hostPlatform.isLinux && !cudaSupport,
   cudaSupport ? config.cudaSupport,
   cudaPackages,
 }:
diff --git a/pkgs/development/python-modules/llfuse/default.nix b/pkgs/development/python-modules/llfuse/default.nix
index 4fa525fa4db2..a110a8082c14 100644
--- a/pkgs/development/python-modules/llfuse/default.nix
+++ b/pkgs/development/python-modules/llfuse/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
   '';
 
   # On Darwin, the test requires macFUSE to be installed outside of Nix.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [
     pytestCheckHook
     which
diff --git a/pkgs/development/python-modules/llvmlite/default.nix b/pkgs/development/python-modules/llvmlite/default.nix
index 9d76e64fde35..19941cd4b4a3 100644
--- a/pkgs/development/python-modules/llvmlite/default.nix
+++ b/pkgs/development/python-modules/llvmlite/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
     cd $out
   '';
 
-  __impureHostDeps = lib.optionals stdenv.isDarwin [ "/usr/lib/libm.dylib" ];
+  __impureHostDeps = lib.optionals stdenv.hostPlatform.isDarwin [ "/usr/lib/libm.dylib" ];
 
   passthru = lib.optionalAttrs (!withStaticLLVM) { inherit llvm; };
 
diff --git a/pkgs/development/python-modules/loguru/default.nix b/pkgs/development/python-modules/loguru/default.nix
index b3ec041169fe..216a20663381 100644
--- a/pkgs/development/python-modules/loguru/default.nix
+++ b/pkgs/development/python-modules/loguru/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
 
   disabledTestPaths = [
     "tests/test_type_hinting.py" # avoid dependency on mypy
-  ] ++ lib.optionals stdenv.isDarwin [ "tests/test_multiprocessing.py" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "tests/test_multiprocessing.py" ];
 
   disabledTests =
     [
@@ -43,7 +43,7 @@ buildPythonPackage rec {
       # Slow test
       "test_time_rotation"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_rotation_and_retention"
       "test_rotation_and_retention_timed_file"
       "test_renaming"
diff --git a/pkgs/development/python-modules/logutils/default.nix b/pkgs/development/python-modules/logutils/default.nix
index eb0e1ebd5368..df79cc9dc3e4 100644
--- a/pkgs/development/python-modules/logutils/default.nix
+++ b/pkgs/development/python-modules/logutils/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
     "test_hashandlers"
   ];
 
-  disabledTestPaths = lib.optionals (stdenv.isDarwin) [
+  disabledTestPaths = lib.optionals (stdenv.hostPlatform.isDarwin) [
     # Exception: unable to connect to Redis server
     "tests/test_redis.py"
   ];
diff --git a/pkgs/development/python-modules/ltpycld2/default.nix b/pkgs/development/python-modules/ltpycld2/default.nix
index 7635b631170c..510259d72d6e 100644
--- a/pkgs/development/python-modules/ltpycld2/default.nix
+++ b/pkgs/development/python-modules/ltpycld2/default.nix
@@ -26,6 +26,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/LibreTranslate/pycld2";
     license = licenses.asl20;
     maintainers = with maintainers; [ misuzu ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/lxml/default.nix b/pkgs/development/python-modules/lxml/default.nix
index bc09e20503e9..c035c5246795 100644
--- a/pkgs/development/python-modules/lxml/default.nix
+++ b/pkgs/development/python-modules/lxml/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
     libxslt.dev
     cython
     setuptools
-  ] ++ lib.optionals stdenv.isDarwin [ xcodebuild ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcodebuild ];
   buildInputs = [
     libxml2
     libxslt
diff --git a/pkgs/development/python-modules/lzallright/default.nix b/pkgs/development/python-modules/lzallright/default.nix
index 697acafb6ed6..ee5be2d8dc44 100644
--- a/pkgs/development/python-modules/lzallright/default.nix
+++ b/pkgs/development/python-modules/lzallright/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   pythonImportsCheck = [ "lzallright" ];
 
diff --git a/pkgs/development/python-modules/m2crypto/default.nix b/pkgs/development/python-modules/m2crypto/default.nix
index 75f1e94f3bb2..1043325e1033 100644
--- a/pkgs/development/python-modules/m2crypto/default.nix
+++ b/pkgs/development/python-modules/m2crypto/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
 
   env =
     {
-      NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin (toString [
+      NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
         "-Wno-error=implicit-function-declaration"
         "-Wno-error=incompatible-pointer-types"
       ]);
diff --git a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
index 55bc5da3fd35..d98cfa259579 100644
--- a/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole-mailbox-server/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
     mock
   ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # these tests fail in Darwin's sandbox
     "src/wormhole_mailbox_server/test/test_web.py"
   ];
diff --git a/pkgs/development/python-modules/magic-wormhole/default.nix b/pkgs/development/python-modules/magic-wormhole/default.nix
index e765a52cc76f..01c714e414b9 100644
--- a/pkgs/development/python-modules/magic-wormhole/default.nix
+++ b/pkgs/development/python-modules/magic-wormhole/default.nix
@@ -52,7 +52,7 @@ buildPythonPackage rec {
         'return "${placeholder "out"}/bin/wormhole"'
     ''
     # fix the location of the ifconfig binary
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       sed -i -e "s|'ifconfig'|'${nettools}/bin/ifconfig'|" src/wormhole/ipaddrs.py
     '';
 
@@ -88,7 +88,7 @@ buildPythonPackage rec {
       pytestCheckHook
     ]
     ++ passthru.optional-dependencies.dilation
-    ++ lib.optionals stdenv.isDarwin [ unixtools.locale ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ unixtools.locale ];
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/magika/default.nix b/pkgs/development/python-modules/magika/default.nix
index 0c670a813741..444f4d844ea3 100644
--- a/pkgs/development/python-modules/magika/default.nix
+++ b/pkgs/development/python-modules/magika/default.nix
@@ -48,6 +48,6 @@ buildPythonPackage rec {
     maintainers = with maintainers; [ mihaimaruseac ];
     mainProgram = "magika";
     # Currently, disabling on AArch64 as it onnx runtime crashes on ofborg
-    broken = stdenv.isAarch64 && stdenv.isLinux;
+    broken = stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux;
   };
 }
diff --git a/pkgs/development/python-modules/mahotas/default.nix b/pkgs/development/python-modules/mahotas/default.nix
index 144aae89c79d..307ed168acdb 100644
--- a/pkgs/development/python-modules/mahotas/default.nix
+++ b/pkgs/development/python-modules/mahotas/default.nix
@@ -49,10 +49,10 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "mahotas" ];
 
-  disabled = stdenv.isi686; # Failing tests
+  disabled = stdenv.hostPlatform.isi686; # Failing tests
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Computer vision package based on numpy";
     homepage = "https://mahotas.readthedocs.io/";
     maintainers = with maintainers; [ luispedro ];
diff --git a/pkgs/development/python-modules/manhole/default.nix b/pkgs/development/python-modules/manhole/default.nix
index d1ca10b9e81c..940dc355e482 100644
--- a/pkgs/development/python-modules/manhole/default.nix
+++ b/pkgs/development/python-modules/manhole/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
   # {test_locals,test_socket_path} fail to remove /tmp/manhole-socket
   # on the x86_64-darwin builder.
   #
-  # TODO: change this back to `doCheck = stdenv.isLinux` after
+  # TODO: change this back to `doCheck = stdenv.hostPlatform.isLinux` after
   # https://github.com/ionelmc/python-manhole/issues/54 is fixed
   doCheck = false;
 
diff --git a/pkgs/development/python-modules/manimpango/default.nix b/pkgs/development/python-modules/manimpango/default.nix
index c0f8e475b365..6a1876ed6376 100644
--- a/pkgs/development/python-modules/manimpango/default.nix
+++ b/pkgs/development/python-modules/manimpango/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ pango ] ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = [ pango ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   propagatedBuildInputs = [ cython ];
 
diff --git a/pkgs/development/python-modules/markdown-it-py/default.nix b/pkgs/development/python-modules/markdown-it-py/default.nix
index 1754ec45b76e..f50f6e8e308c 100644
--- a/pkgs/development/python-modules/markdown-it-py/default.nix
+++ b/pkgs/development/python-modules/markdown-it-py/default.nix
@@ -56,7 +56,7 @@ buildPythonPackage rec {
   preCheck = ''
     rm -r benchmarking
   '';
-  doCheck = !stdenv.isi686;
+  doCheck = !stdenv.hostPlatform.isi686;
 
   pythonImportsCheck = [ "markdown_it" ];
 
diff --git a/pkgs/development/python-modules/materialx/default.nix b/pkgs/development/python-modules/materialx/default.nix
index b1e11ba6de23..7b22621cdb8a 100644
--- a/pkgs/development/python-modules/materialx/default.nix
+++ b/pkgs/development/python-modules/materialx/default.nix
@@ -37,14 +37,14 @@ buildPythonPackage rec {
       openimageio
       imath
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         OpenGL
         Cocoa
       ]
     )
-    ++ lib.optionals (!stdenv.isDarwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
       libX11
       libXt
       libGL
@@ -54,7 +54,7 @@ buildPythonPackage rec {
     (lib.cmakeBool "MATERIALX_BUILD_OIIO" true)
     (lib.cmakeBool "MATERIALX_BUILD_PYTHON" true)
     # don't build MSL shader back-end on x86_x64-darwin, as it requires a newer SDK with metal support
-    (lib.cmakeBool "MATERIALX_BUILD_GEN_MSL" (stdenv.isLinux || (stdenv.isAarch64 && stdenv.isDarwin)))
+    (lib.cmakeBool "MATERIALX_BUILD_GEN_MSL" (stdenv.hostPlatform.isLinux || (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin)))
   ];
 
   pythonImportsCheck = [ "MaterialX" ];
diff --git a/pkgs/development/python-modules/matplotlib/default.nix b/pkgs/development/python-modules/matplotlib/default.nix
index 2bcf4d246c45..d91c96e6dd74 100644
--- a/pkgs/development/python-modules/matplotlib/default.nix
+++ b/pkgs/development/python-modules/matplotlib/default.nix
@@ -52,7 +52,7 @@
 
   # Tk
   # Darwin has its own "MacOSX" backend, PyPy has tkagg backend and does not support tkinter
-  enableTk ? (!stdenv.isDarwin && !isPyPy),
+  enableTk ? (!stdenv.hostPlatform.isDarwin && !isPyPy),
   tcl,
   tk,
   tkinter,
@@ -114,7 +114,7 @@ buildPythonPackage rec {
         --replace-fail '"numpy>=2.0.0rc1,<2.3",' ""
       patchShebangs tools
     ''
-    + lib.optionalString (stdenv.isLinux && interactive) ''
+    + lib.optionalString (stdenv.hostPlatform.isLinux && interactive) ''
       # fix paths to libraries in dlopen calls (headless detection)
       substituteInPlace src/_c_internal_utils.cpp \
         --replace-fail libX11.so.6 ${libX11}/lib/libX11.so.6 \
@@ -139,10 +139,10 @@ buildPythonPackage rec {
       tcl
       tk
     ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   # clang-11: error: argument unused during compilation: '-fno-strict-overflow' [-Werror,-Wunused-command-line-argument]
-  hardeningDisable = lib.optionals stdenv.isDarwin [ "strictoverflow" ];
+  hardeningDisable = lib.optionals stdenv.hostPlatform.isDarwin [ "strictoverflow" ];
 
   build-system = [
     certifi
diff --git a/pkgs/development/python-modules/matplotx/default.nix b/pkgs/development/python-modules/matplotx/default.nix
index 978e35e2404e..8baa52efcf4d 100644
--- a/pkgs/development/python-modules/matplotx/default.nix
+++ b/pkgs/development/python-modules/matplotx/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
 
   # This variable is needed to suppress the "Trace/BPT trap: 5" error in Darwin's checkPhase.
   # Not sure of the details, but we can avoid it by changing the matplotlib backend during testing.
-  env.MPLBACKEND = lib.optionalString stdenv.isDarwin "Agg";
+  env.MPLBACKEND = lib.optionalString stdenv.hostPlatform.isDarwin "Agg";
 
   nativeCheckInputs = [ pytestCheckHook ] ++ passthru.optional-dependencies.all;
 
diff --git a/pkgs/development/python-modules/maxminddb/default.nix b/pkgs/development/python-modules/maxminddb/default.nix
index d510be3b3a2c..0dffe5503122 100644
--- a/pkgs/development/python-modules/maxminddb/default.nix
+++ b/pkgs/development/python-modules/maxminddb/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   # The multiprocessing tests fail on Darwin because multiprocessing uses spawn instead of fork,
   # resulting in an exception when it can’t pickle the `lookup` local function.
-  disabledTests = lib.optionals stdenv.isDarwin [ "multiprocessing" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "multiprocessing" ];
 
   meta = with lib; {
     description = "Reader for the MaxMind DB format";
diff --git a/pkgs/development/python-modules/miniaudio/default.nix b/pkgs/development/python-modules/miniaudio/default.nix
index e7e98b265e2d..0f86ee525000 100644
--- a/pkgs/development/python-modules/miniaudio/default.nix
+++ b/pkgs/development/python-modules/miniaudio/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
 
   build-system = [ setuptools ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AudioToolbox
     CoreAudio
   ];
diff --git a/pkgs/development/python-modules/miniupnpc/default.nix b/pkgs/development/python-modules/miniupnpc/default.nix
index a23ef91c8a81..04d8a08bf1c3 100644
--- a/pkgs/development/python-modules/miniupnpc/default.nix
+++ b/pkgs/development/python-modules/miniupnpc/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
     hash = "sha256-KwpNVl+tZTZHHZKW9p3a/S0nZJW6lZftjBK9ECkRUMo=";
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
     which
   ];
diff --git a/pkgs/development/python-modules/mip/default.nix b/pkgs/development/python-modules/mip/default.nix
index 16ecf80905aa..63f2eeb59d72 100644
--- a/pkgs/development/python-modules/mip/default.nix
+++ b/pkgs/development/python-modules/mip/default.nix
@@ -89,7 +89,7 @@ buildPythonPackage rec {
     downloadPage = "https://github.com/coin-or/python-mip/releases";
     changelog = "https://github.com/coin-or/python-mip/releases/tag/${version}";
     license = licenses.epl20;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     maintainers = with maintainers; [ nessdoor ];
   };
 }
diff --git a/pkgs/development/python-modules/mitmproxy-rs/default.nix b/pkgs/development/python-modules/mitmproxy-rs/default.nix
index bc2ed1694071..cbe1442da06b 100644
--- a/pkgs/development/python-modules/mitmproxy-rs/default.nix
+++ b/pkgs/development/python-modules/mitmproxy-rs/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     libiconv
     mitmproxy-macos
diff --git a/pkgs/development/python-modules/mitmproxy/default.nix b/pkgs/development/python-modules/mitmproxy/default.nix
index 2c4d1da6e629..5e01020bb21f 100644
--- a/pkgs/development/python-modules/mitmproxy/default.nix
+++ b/pkgs/development/python-modules/mitmproxy/default.nix
@@ -91,7 +91,7 @@ buildPythonPackage rec {
     urwid
     wsproto
     zstandard
-  ] ++ lib.optionals stdenv.isDarwin [ mitmproxy-macos ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ mitmproxy-macos ];
 
   nativeCheckInputs = [
     hypothesis
diff --git a/pkgs/development/python-modules/mmengine/default.nix b/pkgs/development/python-modules/mmengine/default.nix
index ff07caeb877e..e8efda866dac 100644
--- a/pkgs/development/python-modules/mmengine/default.nix
+++ b/pkgs/development/python-modules/mmengine/default.nix
@@ -114,6 +114,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/open-mmlab/mmengine/releases/tag/v${version}";
     license = with licenses; [ asl20 ];
     maintainers = with maintainers; [ rxiao ];
-    broken = stdenv.isDarwin || (stdenv.isLinux && stdenv.isAarch64);
+    broken = stdenv.hostPlatform.isDarwin || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/python-modules/mocket/default.nix b/pkgs/development/python-modules/mocket/default.nix
index eb5ffb2b244f..1df4cc1eef21 100644
--- a/pkgs/development/python-modules/mocket/default.nix
+++ b/pkgs/development/python-modules/mocket/default.nix
@@ -74,12 +74,12 @@ buildPythonPackage rec {
     ++ lib.optionals (pythonOlder "3.12") [ aiohttp ]
     ++ lib.flatten (builtins.attrValues passthru.optional-dependencies);
 
-  preCheck = lib.optionalString stdenv.isLinux ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isLinux ''
     ${redis-server}/bin/redis-server &
     REDIS_PID=$!
   '';
 
-  postCheck = lib.optionalString stdenv.isLinux ''
+  postCheck = lib.optionalString stdenv.hostPlatform.isLinux ''
     kill $REDIS_PID
   '';
 
@@ -98,7 +98,7 @@ buildPythonPackage rec {
     "test_no_dangling_fds"
   ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [ "tests/main/test_redis.py" ];
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [ "tests/main/test_redis.py" ];
 
   pythonImportsCheck = [ "mocket" ];
 
diff --git a/pkgs/development/python-modules/modeled/default.nix b/pkgs/development/python-modules/modeled/default.nix
index 04655a61378f..07127184d216 100644
--- a/pkgs/development/python-modules/modeled/default.nix
+++ b/pkgs/development/python-modules/modeled/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "modeled" ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "Universal data modeling for Python";
     homepage = "https://github.com/modeled/modeled";
     license = licenses.lgpl3Only;
diff --git a/pkgs/development/python-modules/moderngl-window/default.nix b/pkgs/development/python-modules/moderngl-window/default.nix
index 27fd4ef9663d..5539d053a065 100644
--- a/pkgs/development/python-modules/moderngl-window/default.nix
+++ b/pkgs/development/python-modules/moderngl-window/default.nix
@@ -72,6 +72,6 @@ buildPythonPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [ c0deaddict ];
     inherit (mesa.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/monotonic/default.nix b/pkgs/development/python-modules/monotonic/default.nix
index 8b138a383080..46e8e0f35492 100644
--- a/pkgs/development/python-modules/monotonic/default.nix
+++ b/pkgs/development/python-modules/monotonic/default.nix
@@ -15,9 +15,9 @@ buildPythonPackage rec {
     sha256 = "3a55207bcfed53ddd5c5bae174524062935efed17792e9de2ad0205ce9ad63f7";
   };
 
-  __propagatedImpureHostDeps = lib.optional stdenv.isDarwin "/usr/lib/libc.dylib";
+  __propagatedImpureHostDeps = lib.optional stdenv.hostPlatform.isDarwin "/usr/lib/libc.dylib";
 
-  patchPhase = lib.optionalString stdenv.isLinux ''
+  patchPhase = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace monotonic.py --replace \
       "ctypes.util.find_library('c')" "'${stdenv.cc.libc}/lib/libc.so'"
   '';
diff --git a/pkgs/development/python-modules/morecantile/default.nix b/pkgs/development/python-modules/morecantile/default.nix
index 0a8a5001c003..d7e31fa4af6e 100644
--- a/pkgs/development/python-modules/morecantile/default.nix
+++ b/pkgs/development/python-modules/morecantile/default.nix
@@ -43,7 +43,7 @@ buildPythonPackage rec {
     rasterio
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # https://github.com/developmentseed/morecantile/issues/156
     "test_tiles_when_tms_bounds_and_provided_bounds_cross_antimeridian"
   ];
diff --git a/pkgs/development/python-modules/motioneye-client/default.nix b/pkgs/development/python-modules/motioneye-client/default.nix
index 1d27f9e0dbbb..487de3c3228c 100644
--- a/pkgs/development/python-modules/motioneye-client/default.nix
+++ b/pkgs/development/python-modules/motioneye-client/default.nix
@@ -48,6 +48,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/dermotduffy/motioneye-client";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/myjwt/default.nix b/pkgs/development/python-modules/myjwt/default.nix
index 78e368360a41..094065310854 100644
--- a/pkgs/development/python-modules/myjwt/default.nix
+++ b/pkgs/development/python-modules/myjwt/default.nix
@@ -68,6 +68,6 @@ buildPythonPackage rec {
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
     # Build failures
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/nats-py/default.nix b/pkgs/development/python-modules/nats-py/default.nix
index e96ba513b131..4a28fc2c57bd 100644
--- a/pkgs/development/python-modules/nats-py/default.nix
+++ b/pkgs/development/python-modules/nats-py/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
       "test_ordered_consumer_larger_streams"
       "test_object_file_basics"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_subscribe_iterate_next_msg"
       "test_buf_size_force_flush_timeout"
     ];
diff --git a/pkgs/development/python-modules/ndtypes/default.nix b/pkgs/development/python-modules/ndtypes/default.nix
index 55ec525d4420..d3eb0a25ed01 100644
--- a/pkgs/development/python-modules/ndtypes/default.nix
+++ b/pkgs/development/python-modules/ndtypes/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage {
       mkdir $out/include
       cp python/ndtypes/*.h $out/include
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -add_rpath ${libndtypes}/lib $out/${python.sitePackages}/ndtypes/_ndtypes.*.so
     '';
 
diff --git a/pkgs/development/python-modules/nh3/default.nix b/pkgs/development/python-modules/nh3/default.nix
index 1699b18c182d..f438525e5182 100644
--- a/pkgs/development/python-modules/nh3/default.nix
+++ b/pkgs/development/python-modules/nh3/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/development/python-modules/nipype/default.nix b/pkgs/development/python-modules/nipype/default.nix
index da8452a437ed..6169a0f69da3 100644
--- a/pkgs/development/python-modules/nipype/default.nix
+++ b/pkgs/development/python-modules/nipype/default.nix
@@ -93,7 +93,7 @@ buildPythonPackage rec {
   ];
 
   # checks on darwin inspect memory which doesn't work in build environment
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   # ignore tests which incorrect fail to detect xvfb
   checkPhase = ''
     LC_ALL="en_US.UTF-8" pytest nipype/tests -k 'not display and not test_no_et_multiproc'
diff --git a/pkgs/development/python-modules/nitime/default.nix b/pkgs/development/python-modules/nitime/default.nix
index 6cc35b662c00..35b8eb4c46fc 100644
--- a/pkgs/development/python-modules/nitime/default.nix
+++ b/pkgs/development/python-modules/nitime/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  doCheck = !stdenv.isDarwin; # tests hang indefinitely
+  doCheck = !stdenv.hostPlatform.isDarwin; # tests hang indefinitely
 
   pythonImportsCheck = [ "nitime" ];
 
diff --git a/pkgs/development/python-modules/notify-py/default.nix b/pkgs/development/python-modules/notify-py/default.nix
index 38f4ff5af140..cc46dbe77fdf 100644
--- a/pkgs/development/python-modules/notify-py/default.nix
+++ b/pkgs/development/python-modules/notify-py/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
   };
 
   patches =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       # hardcode paths to aplay and notify-send
       (substituteAll {
         src = ./linux-paths.patch;
@@ -39,7 +39,7 @@ buildPythonPackage rec {
         notifysend = "${libnotify}/bin/notify-send";
       })
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # hardcode path to which
       (substituteAll {
         src = ./darwin-paths.patch;
@@ -53,19 +53,19 @@ buildPythonPackage rec {
 
   pythonRelaxDeps = [ "loguru" ];
 
-  propagatedBuildInputs = [ loguru ] ++ lib.optionals stdenv.isLinux [ jeepney ];
+  propagatedBuildInputs = [ loguru ] ++ lib.optionals stdenv.hostPlatform.isLinux [ jeepney ];
 
-  nativeCheckInputs = [ pytest ] ++ lib.optionals stdenv.isLinux [ dbus ];
+  nativeCheckInputs = [ pytest ] ++ lib.optionals stdenv.hostPlatform.isLinux [ dbus ];
 
   checkPhase =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       ''
         # Tests search for "afplay" binary which is built in to macOS and not available in nixpkgs
         mkdir $TMP/bin
         ln -s ${coreutils}/bin/true $TMP/bin/afplay
         PATH="$TMP/bin:$PATH" pytest
       ''
-    else if stdenv.isLinux then
+    else if stdenv.hostPlatform.isLinux then
       ''
         dbus-run-session \
           --config-file=${dbus}/share/dbus-1/session.conf \
diff --git a/pkgs/development/python-modules/numba/default.nix b/pkgs/development/python-modules/numba/default.nix
index 10f622b37722..18bd264c5d76 100644
--- a/pkgs/development/python-modules/numba/default.nix
+++ b/pkgs/development/python-modules/numba/default.nix
@@ -78,7 +78,7 @@ buildPythonPackage rec {
         "dldir = [ '${addDriverRunpath.driverLink}/lib', "
   '';
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   build-system = [
     setuptools
diff --git a/pkgs/development/python-modules/numpy/1.nix b/pkgs/development/python-modules/numpy/1.nix
index ade66d14b829..2bd7a44903fa 100644
--- a/pkgs/development/python-modules/numpy/1.nix
+++ b/pkgs/development/python-modules/numpy/1.nix
@@ -105,7 +105,7 @@ buildPythonPackage rec {
       meson-python
       pkg-config
     ]
-    ++ lib.optionals (stdenv.isDarwin) [ xcbuild.xcrun ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ xcbuild.xcrun ]
     ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [ mesonEmulatorHook ];
 
   buildInputs = [
@@ -155,13 +155,13 @@ buildPythonPackage rec {
 
   # https://github.com/numpy/numpy/issues/24548
   disabledTests =
-    lib.optionals stdenv.isi686 [
+    lib.optionals stdenv.hostPlatform.isi686 [
       "test_new_policy" # AssertionError: assert False
       "test_identityless_reduction_huge_array" # ValueError: Maximum allowed dimension exceeded
       "test_float_remainder_overflow" # AssertionError: FloatingPointError not raised by divmod
       "test_int" # AssertionError: selectedintkind(19): expected 16 but got -1
     ]
-    ++ lib.optionals stdenv.isAarch32 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch32 [
       "test_impossible_feature_enable" # AssertionError: Failed to generate error
       "test_features" # AssertionError: Failure Detection
       "test_new_policy" # AssertionError: assert False
@@ -173,10 +173,10 @@ buildPythonPackage rec {
       "test_big_arrays" # ValueError: array is too big; `arr.size * arr.dtype.itemsize` is larger tha...
       "test_multinomial_pvals_float32" # Failed: DID NOT RAISE <class 'ValueError'>
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       "test_big_arrays" # OOM on a 16G machine
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       # can fail on virtualized machines confused over their cpu identity
       "test_dispatcher"
     ];
diff --git a/pkgs/development/python-modules/numpy/2.nix b/pkgs/development/python-modules/numpy/2.nix
index 5b71602d72c2..e8f6d36b73d8 100644
--- a/pkgs/development/python-modules/numpy/2.nix
+++ b/pkgs/development/python-modules/numpy/2.nix
@@ -90,7 +90,7 @@ buildPythonPackage rec {
       meson-python
       pkg-config
     ]
-    ++ lib.optionals stdenv.isDarwin [ xcbuild.xcrun ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild.xcrun ]
     ++ lib.optionals (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) [ mesonEmulatorHook ];
 
   # we default openblas to build with 64 threads
@@ -144,7 +144,7 @@ buildPythonPackage rec {
       # https://github.com/numpy/numpy/issues/26713
       "test_iter_refcount"
     ]
-    ++ lib.optionals stdenv.isAarch32 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch32 [
       # https://github.com/numpy/numpy/issues/24548
       "test_impossible_feature_enable" # AssertionError: Failed to generate error
       "test_features" # AssertionError: Failure Detection
@@ -157,7 +157,7 @@ buildPythonPackage rec {
       "test_big_arrays" # ValueError: array is too big; `arr.size * arr.dtype.itemsize` is larger tha...
       "test_multinomial_pvals_float32" # Failed: DID NOT RAISE <class 'ValueError'>
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       # AssertionError: (np.int64(0), np.longdouble('9.9999999999999994515e-21'), np.longdouble('3.9696755572509052902e+20'), 'arctanh')
       "test_loss_of_precision"
     ];
diff --git a/pkgs/development/python-modules/nutils-poly/default.nix b/pkgs/development/python-modules/nutils-poly/default.nix
index 3acda2fe55f1..e15b2fcd2a27 100644
--- a/pkgs/development/python-modules/nutils-poly/default.nix
+++ b/pkgs/development/python-modules/nutils-poly/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ rustPlatform.cargoSetupHook ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   build-system = [ rustPlatform.maturinBuildHook ];
 
diff --git a/pkgs/development/python-modules/okonomiyaki/default.nix b/pkgs/development/python-modules/okonomiyaki/default.nix
index 816b93c833a7..d8b909b9a571 100644
--- a/pkgs/development/python-modules/okonomiyaki/default.nix
+++ b/pkgs/development/python-modules/okonomiyaki/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
       substituteInPlace okonomiyaki/runtimes/tests/test_runtime.py \
         --replace 'runtime_info = PythonRuntime.from_running_python()' 'raise unittest.SkipTest() #'
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace okonomiyaki/platforms/tests/test_pep425.py \
         --replace 'self.assertEqual(platform_tag, self.tag.platform)' 'raise unittest.SkipTest()'
     '';
diff --git a/pkgs/development/python-modules/onecache/default.nix b/pkgs/development/python-modules/onecache/default.nix
index 03a8520bbfe0..fb1aa5c65484 100644
--- a/pkgs/development/python-modules/onecache/default.nix
+++ b/pkgs/development/python-modules/onecache/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     pytest-asyncio
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # test fails due to unknown reason on darwin
     "test_lru_and_ttl_refresh"
   ];
diff --git a/pkgs/development/python-modules/onnx/default.nix b/pkgs/development/python-modules/onnx/default.nix
index a0cc441e2e50..f8bdd75368a1 100644
--- a/pkgs/development/python-modules/onnx/default.nix
+++ b/pkgs/development/python-modules/onnx/default.nix
@@ -123,7 +123,7 @@ buildPythonPackage rec {
       "test_vgg19_cpu"
       "test_zfnet512_cpu"
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       # AssertionError: Output 0 of test 0 in folder
       "test__pytorch_converted_Conv2d_depthwise_padded"
       "test__pytorch_converted_Conv2d_dilated"
diff --git a/pkgs/development/python-modules/onnxruntime/default.nix b/pkgs/development/python-modules/onnxruntime/default.nix
index c0227ee831f0..48c342c1626f 100644
--- a/pkgs/development/python-modules/onnxruntime/default.nix
+++ b/pkgs/development/python-modules/onnxruntime/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage {
     chmod +w dist
   '';
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   # This project requires fairly large dependencies such as sympy which we really don't always need.
   pythonRemoveDeps = [
diff --git a/pkgs/development/python-modules/open-clip-torch/default.nix b/pkgs/development/python-modules/open-clip-torch/default.nix
index dc3bf4d78591..a315c3d0d070 100644
--- a/pkgs/development/python-modules/open-clip-torch/default.nix
+++ b/pkgs/development/python-modules/open-clip-torch/default.nix
@@ -79,7 +79,7 @@ buildPythonPackage rec {
       # fails due to type errors
       "test_num_shards"
     ]
-    ++ lib.optionals (stdenv.isAarch64 && stdenv.isLinux) [
+    ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
       "test_training"
       "test_training_coca"
       "test_training_unfreezing_vit"
diff --git a/pkgs/development/python-modules/opensfm/default.nix b/pkgs/development/python-modules/opensfm/default.nix
index bd5b97ab2852..bfaa8b8f1b73 100644
--- a/pkgs/development/python-modules/opensfm/default.nix
+++ b/pkgs/development/python-modules/opensfm/default.nix
@@ -113,7 +113,7 @@ buildPythonPackage rec {
     [
       "test_run_all" # Matplotlib issues. Broken integration is less useless than a broken build
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_reconstruction_incremental"
       "test_reconstruction_triangulation"
     ];
@@ -121,7 +121,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "opensfm" ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = [ lib.maintainers.SomeoneSerge ];
     license = lib.licenses.bsd2;
     changelog = "https://github.com/mapillary/OpenSfM/blob/${src.rev}/CHANGELOG.md";
diff --git a/pkgs/development/python-modules/openstacksdk/tests.nix b/pkgs/development/python-modules/openstacksdk/tests.nix
index be333be87665..c5bbc68e3d6c 100644
--- a/pkgs/development/python-modules/openstacksdk/tests.nix
+++ b/pkgs/development/python-modules/openstacksdk/tests.nix
@@ -39,7 +39,7 @@ buildPythonPackage {
     ''
       stestr run -e <(echo "
     ''
-    + lib.optionalString stdenv.isAarch64 ''
+    + lib.optionalString stdenv.hostPlatform.isAarch64 ''
       openstack.tests.unit.cloud.test_baremetal_node.TestBaremetalNode.test_node_set_provision_state_with_retries
       openstack.tests.unit.cloud.test_role_assignment.TestRoleAssignment.test_grant_role_user_domain_exists
       openstack.tests.unit.cloud.test_volume_backups.TestVolumeBackups.test_delete_volume_backup_force
diff --git a/pkgs/development/python-modules/opentelemetry-instrumentation-grpc/default.nix b/pkgs/development/python-modules/opentelemetry-instrumentation-grpc/default.nix
index 9cf347c046ac..26bde1eaae5e 100644
--- a/pkgs/development/python-modules/opentelemetry-instrumentation-grpc/default.nix
+++ b/pkgs/development/python-modules/opentelemetry-instrumentation-grpc/default.nix
@@ -52,7 +52,7 @@ buildPythonPackage {
     pytestCheckHook
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # RuntimeError: Failed to bind to address
     "TestOpenTelemetryServerInterceptorUnix"
   ];
diff --git a/pkgs/development/python-modules/openusd/default.nix b/pkgs/development/python-modules/openusd/default.nix
index f281bc352d1b..0849ce8dfd7a 100644
--- a/pkgs/development/python-modules/openusd/default.nix
+++ b/pkgs/development/python-modules/openusd/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
     hash = "sha256-akwLIB5YUbnDiaQXX/K5YLXzWlTYWZG51dtxbSFxPt0=";
   };
 
-  stdenv = if python.stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else python.stdenv;
+  stdenv = if python.stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else python.stdenv;
 
   outputs = [ "out" ] ++ lib.optional withDocs "doc";
 
@@ -92,7 +92,7 @@ buildPythonPackage rec {
     (lib.cmakeBool "PXR_BUILD_USDVIEW" withUsdView)
     (lib.cmakeBool "PXR_BUILD_USD_TOOLS" withTools)
     (lib.cmakeBool "PXR_ENABLE_MATERIALX_SUPPORT" true)
-    (lib.cmakeBool "PXR_ENABLE_OSL_SUPPORT" (!stdenv.isDarwin && withOsl))
+    (lib.cmakeBool "PXR_ENABLE_OSL_SUPPORT" (!stdenv.hostPlatform.isDarwin && withOsl))
   ];
 
   nativeBuildInputs =
@@ -124,15 +124,15 @@ buildPythonPackage rec {
       ptex
       tbb
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       libGL
       libX11
       libXt
     ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks; [ Cocoa ])
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [ Cocoa ])
     ++ lib.optionals withOsl [ osl ]
     ++ lib.optionals withUsdView [ qt6.qtbase ]
-    ++ lib.optionals (withUsdView && stdenv.isLinux) [
+    ++ lib.optionals (withUsdView && stdenv.hostPlatform.isLinux) [
       qt6.qtbase
       qt6.qtwayland
     ];
diff --git a/pkgs/development/python-modules/orange-canvas-core/default.nix b/pkgs/development/python-modules/orange-canvas-core/default.nix
index 523e4f857af2..3db1f35784bd 100644
--- a/pkgs/development/python-modules/orange-canvas-core/default.nix
+++ b/pkgs/development/python-modules/orange-canvas-core/default.nix
@@ -94,6 +94,6 @@ buildPythonPackage rec {
     license = [ lib.licenses.gpl3 ];
     maintainers = [ lib.maintainers.lucasew ];
     # Segmentation fault during tests
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/orange-widget-base/default.nix b/pkgs/development/python-modules/orange-widget-base/default.nix
index 50a1e956919a..28c97fdb4238 100644
--- a/pkgs/development/python-modules/orange-widget-base/default.nix
+++ b/pkgs/development/python-modules/orange-widget-base/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     pyqtgraph
     pyqtwebengine
     typing-extensions
-  ] ++ lib.optionals stdenv.isDarwin [ appnope ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ appnope ];
 
   pythonImportsCheck = [ "orangewidget" ];
 
diff --git a/pkgs/development/python-modules/orbax-checkpoint/default.nix b/pkgs/development/python-modules/orbax-checkpoint/default.nix
index ccf370682b5b..511542d0a490 100644
--- a/pkgs/development/python-modules/orbax-checkpoint/default.nix
+++ b/pkgs/development/python-modules/orbax-checkpoint/default.nix
@@ -75,7 +75,7 @@ buildPythonPackage rec {
     "orbax.checkpoint"
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # Probably failing because of a filesystem impurity
     # self.assertFalse(os.path.exists(dst_dir))
     # AssertionError: True is not false
diff --git a/pkgs/development/python-modules/orjson/default.nix b/pkgs/development/python-modules/orjson/default.nix
index 650d8a634d51..9fd8fe941adb 100644
--- a/pkgs/development/python-modules/orjson/default.nix
+++ b/pkgs/development/python-modules/orjson/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
       maturinBuildHook
     ]);
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeCheckInputs = [
     numpy
diff --git a/pkgs/development/python-modules/osc/default.nix b/pkgs/development/python-modules/osc/default.nix
index f794b91fb0cb..bb16aa7d40e0 100644
--- a/pkgs/development/python-modules/osc/default.nix
+++ b/pkgs/development/python-modules/osc/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
   preCheck = "HOME=$TOP/tmp";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/openSUSE/osc";
     description = "opensuse-commander with svn like handling";
     mainProgram = "osc";
diff --git a/pkgs/development/python-modules/oscrypto/default.nix b/pkgs/development/python-modules/oscrypto/default.nix
index fe80b0ac42d4..ef90df289af6 100644
--- a/pkgs/development/python-modules/oscrypto/default.nix
+++ b/pkgs/development/python-modules/oscrypto/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "oscrypto" ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTests = [
     # Tests require network access
diff --git a/pkgs/development/python-modules/oslo-log/default.nix b/pkgs/development/python-modules/oslo-log/default.nix
index b6cdf9661953..81a9bd5b8e4b 100644
--- a/pkgs/development/python-modules/oslo-log/default.nix
+++ b/pkgs/development/python-modules/oslo-log/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
     oslo-utils
     pbr
     python-dateutil
-  ] ++ lib.optionals stdenv.isLinux [ pyinotify ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ pyinotify ];
 
   nativeCheckInputs = [
     eventlet
diff --git a/pkgs/development/python-modules/ospd/default.nix b/pkgs/development/python-modules/ospd/default.nix
index e18bc804cfda..ad9bb84c747e 100644
--- a/pkgs/development/python-modules/ospd/default.nix
+++ b/pkgs/development/python-modules/ospd/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   version = "21.4.4";
   format = "setuptools";
 
-  disabled = pythonOlder "3.7" || stdenv.isDarwin;
+  disabled = pythonOlder "3.7" || stdenv.hostPlatform.isDarwin;
 
   src = fetchFromGitHub {
     owner = "greenbone";
diff --git a/pkgs/development/python-modules/osxphotos/default.nix b/pkgs/development/python-modules/osxphotos/default.nix
index ab4f7e0c0520..0af996f622a8 100644
--- a/pkgs/development/python-modules/osxphotos/default.nix
+++ b/pkgs/development/python-modules/osxphotos/default.nix
@@ -107,6 +107,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/RhetTbull/osxphotos/blob/${src.rev}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ sigmanificient ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/overly/default.nix b/pkgs/development/python-modules/overly/default.nix
index f234c910865e..ea3b291700a0 100644
--- a/pkgs/development/python-modules/overly/default.nix
+++ b/pkgs/development/python-modules/overly/default.nix
@@ -36,6 +36,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/theelous3/overly";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ dotlambda ];
-    broken = stdenv.isDarwin; # https://github.com/theelous3/overly/issues/2
+    broken = stdenv.hostPlatform.isDarwin; # https://github.com/theelous3/overly/issues/2
   };
 }
diff --git a/pkgs/development/python-modules/paddlepaddle/default.nix b/pkgs/development/python-modules/paddlepaddle/default.nix
index 238880794042..8263ae8ec8c5 100644
--- a/pkgs/development/python-modules/paddlepaddle/default.nix
+++ b/pkgs/development/python-modules/paddlepaddle/default.nix
@@ -76,7 +76,7 @@ buildPythonPackage {
     )
   );
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     function fixRunPath {
       p=$(patchelf --print-rpath $1)
       patchelf --set-rpath "$p:$libraryPath" $1
diff --git a/pkgs/development/python-modules/paho-mqtt/1.nix b/pkgs/development/python-modules/paho-mqtt/1.nix
index 83582102767b..437f7899fad0 100644
--- a/pkgs/development/python-modules/paho-mqtt/1.nix
+++ b/pkgs/development/python-modules/paho-mqtt/1.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
     six
   ] ++ lib.optionals (!isPy3k) [ mock ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "paho.mqtt" ];
 
diff --git a/pkgs/development/python-modules/paho-mqtt/default.nix b/pkgs/development/python-modules/paho-mqtt/default.nix
index 437aa9884beb..890cf28a7462 100644
--- a/pkgs/development/python-modules/paho-mqtt/default.nix
+++ b/pkgs/development/python-modules/paho-mqtt/default.nix
@@ -37,7 +37,7 @@ in buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "paho.mqtt" ];
 
diff --git a/pkgs/development/python-modules/pandas-stubs/default.nix b/pkgs/development/python-modules/pandas-stubs/default.nix
index 62cefd16c3cd..f216673fc7f0 100644
--- a/pkgs/development/python-modules/pandas-stubs/default.nix
+++ b/pkgs/development/python-modules/pandas-stubs/default.nix
@@ -89,10 +89,10 @@ buildPythonPackage rec {
       "test_timedelta_cmp"
       "test_timestamp_cmp"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_clipboard" # FileNotFoundError: [Errno 2] No such file or directory: 'pbcopy'
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # Disable tests for types that are not supported on aarch64 in `numpy` < 2.0
       "test_astype_float" # `f16` and `float128`
       "test_astype_complex" # `c32` and `complex256`
diff --git a/pkgs/development/python-modules/pandas/default.nix b/pkgs/development/python-modules/pandas/default.nix
index 3323c5c9a83b..83103314bd83 100644
--- a/pkgs/development/python-modules/pandas/default.nix
+++ b/pkgs/development/python-modules/pandas/default.nix
@@ -184,11 +184,11 @@ let
         pytestCheckHook
       ]
       ++ lib.flatten (lib.attrValues passthru.optional-dependencies)
-      ++ lib.optionals (stdenv.isLinux) [
+      ++ lib.optionals (stdenv.hostPlatform.isLinux) [
         # for locale executable
         glibc
       ]
-      ++ lib.optionals (stdenv.isDarwin) [
+      ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
         # for locale executable
         adv_cmds
       ];
@@ -213,13 +213,13 @@ let
         # AssertionError: Did not see expected warning of class 'FutureWarning'
         "test_parsing_tzlocal_deprecated"
       ]
-      ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+      ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
         # tests/generic/test_finalize.py::test_binops[and_-args4-right] - AssertionError: assert {} == {'a': 1}
         "test_binops"
         # These tests are unreliable on aarch64-darwin. See https://github.com/pandas-dev/pandas/issues/38921.
         "test_rolling"
       ]
-      ++ lib.optional stdenv.is32bit [
+      ++ lib.optional stdenv.hostPlatform.is32bit [
         # https://github.com/pandas-dev/pandas/issues/37398
         "test_rolling_var_numerical_issues"
       ];
@@ -234,7 +234,7 @@ let
       ''
       # TODO: Get locale and clipboard support working on darwin.
       #       Until then we disable the tests.
-      + lib.optionalString stdenv.isDarwin ''
+      + lib.optionalString stdenv.hostPlatform.isDarwin ''
         # Fake the impure dependencies pbpaste and pbcopy
         echo "#!${runtimeShell}" > pbcopy
         echo "#!${runtimeShell}" > pbpaste
@@ -246,7 +246,7 @@ let
 
     meta = with lib; {
       # pandas devs no longer test i686, it's commonly broken
-      # broken = stdenv.isi686;
+      # broken = stdenv.hostPlatform.isi686;
       changelog = "https://pandas.pydata.org/docs/whatsnew/index.html";
       description = "Powerful data structures for data analysis, time series, and statistics";
       downloadPage = "https://github.com/pandas-dev/pandas";
diff --git a/pkgs/development/python-modules/papermill/default.nix b/pkgs/development/python-modules/papermill/default.nix
index 2a5352b9d058..3c310b72b28b 100644
--- a/pkgs/development/python-modules/papermill/default.nix
+++ b/pkgs/development/python-modules/papermill/default.nix
@@ -91,7 +91,7 @@ buildPythonPackage rec {
       # pytest 8 compat
       "test_read_with_valid_file_extension"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # might fail due to the sandbox
       "test_end2end_autosave_slow_notebook"
     ];
diff --git a/pkgs/development/python-modules/papis/default.nix b/pkgs/development/python-modules/papis/default.nix
index 06c4f97cde5e..f7f36edfb201 100644
--- a/pkgs/development/python-modules/papis/default.nix
+++ b/pkgs/development/python-modules/papis/default.nix
@@ -100,7 +100,7 @@ buildPythonPackage rec {
     "test_valid_dblp_key"
     "test_validate_arxivid"
     "test_yaml"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_default_opener" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_default_opener" ];
 
   pythonImportsCheck = [ "papis" ];
 
diff --git a/pkgs/development/python-modules/patool/default.nix b/pkgs/development/python-modules/patool/default.nix
index feaef66da2b7..fa0ae199bd74 100644
--- a/pkgs/development/python-modules/patool/default.nix
+++ b/pkgs/development/python-modules/patool/default.nix
@@ -61,7 +61,7 @@ buildPythonPackage rec {
     "test_unzip_file"
     "test_zip"
     "test_zip_file"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_ar" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_ar" ];
 
   meta = with lib; {
     description = "portable archive file manager";
diff --git a/pkgs/development/python-modules/pdf2docx/default.nix b/pkgs/development/python-modules/pdf2docx/default.nix
index af91594808b5..12d347227a9b 100644
--- a/pkgs/development/python-modules/pdf2docx/default.nix
+++ b/pkgs/development/python-modules/pdf2docx/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage {
     python-docx
   ];
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     # on linux the icon file can only be xbm format
     convert $out/${python.sitePackages}/pdf2docx/gui/icon.ico \
       $out/${python.sitePackages}/pdf2docx/gui/icon.xbm
diff --git a/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix b/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix
index 3a653ec5f49a..9e74fa519175 100644
--- a/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix
+++ b/pkgs/development/python-modules/pdoc-pyo3-sample-library/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   pythonImportsCheck = [ "pdoc_pyo3_sample_library" ];
 
diff --git a/pkgs/development/python-modules/pebble/default.nix b/pkgs/development/python-modules/pebble/default.nix
index 827e45f12590..ea618df3293f 100644
--- a/pkgs/development/python-modules/pebble/default.nix
+++ b/pkgs/development/python-modules/pebble/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "pebble" ];
 
diff --git a/pkgs/development/python-modules/pendulum/default.nix b/pkgs/development/python-modules/pendulum/default.nix
index 627769ff18c8..bd74e66c6915 100644
--- a/pkgs/development/python-modules/pendulum/default.nix
+++ b/pkgs/development/python-modules/pendulum/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
     rustPlatform.cargoSetupHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ iconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ iconv ];
 
   propagatedBuildInputs =
     [
@@ -82,7 +82,7 @@ buildPythonPackage rec {
 
   disabledTestPaths =
     [ "tests/benchmarks" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # PermissionError: [Errno 1] Operation not permitted: '/etc/localtime'
       "tests/testing/test_time_travel.py"
     ];
diff --git a/pkgs/development/python-modules/perfplot/default.nix b/pkgs/development/python-modules/perfplot/default.nix
index 78cd6bdaf999..e71358857354 100644
--- a/pkgs/development/python-modules/perfplot/default.nix
+++ b/pkgs/development/python-modules/perfplot/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
 
   # This variable is needed to suppress the "Trace/BPT trap: 5" error in Darwin's checkPhase.
   # Not sure of the details, but we can avoid it by changing the matplotlib backend during testing.
-  env.MPLBACKEND = lib.optionalString stdenv.isDarwin "Agg";
+  env.MPLBACKEND = lib.optionalString stdenv.hostPlatform.isDarwin "Agg";
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/pettingzoo/default.nix b/pkgs/development/python-modules/pettingzoo/default.nix
index 1e03c7734dde..9bb487e85630 100644
--- a/pkgs/development/python-modules/pettingzoo/default.nix
+++ b/pkgs/development/python-modules/pettingzoo/default.nix
@@ -117,7 +117,7 @@ buildPythonPackage rec {
       # ImportError: cannot import name 'pytest_plugins' from 'pettingzoo.classic'
       "test_chess"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Crashes on darwin: `Fatal Python error: Aborted`
       "test_multi_episode_parallel_env_wrapper"
     ];
diff --git a/pkgs/development/python-modules/pgcli/default.nix b/pkgs/development/python-modules/pgcli/default.nix
index 38bbed27eef5..ce812bcdf225 100644
--- a/pkgs/development/python-modules/pgcli/default.nix
+++ b/pkgs/development/python-modules/pgcli/default.nix
@@ -56,7 +56,7 @@ buildPythonPackage rec {
   disabledTests = [
     # requires running postgres
     "test_application_name_in_env"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_application_name_db_uri" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_application_name_db_uri" ];
 
   meta = with lib; {
     description = "Command-line interface for PostgreSQL";
diff --git a/pkgs/development/python-modules/picosvg/default.nix b/pkgs/development/python-modules/picosvg/default.nix
index 2e938d5115d8..f147b22ad97e 100644
--- a/pkgs/development/python-modules/picosvg/default.nix
+++ b/pkgs/development/python-modules/picosvg/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ pytestCheckHook ];
 
   # a few tests are failing on aarch64
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   meta = with lib; {
     description = "Tool to simplify SVGs";
diff --git a/pkgs/development/python-modules/pillow-heif/default.nix b/pkgs/development/python-modules/pillow-heif/default.nix
index d512839a797c..5c8488b9f17c 100644
--- a/pkgs/development/python-modules/pillow-heif/default.nix
+++ b/pkgs/development/python-modules/pillow-heif/default.nix
@@ -90,12 +90,12 @@ buildPythonPackage rec {
       # Time based
       "test_decode_threads"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # https://github.com/bigcat88/pillow_heif/issues/89
       # not reproducible in nixpkgs
       "test_opencv_crash"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # RuntimeError: Encoder plugin generated an error: Unsupported bit depth: Bit depth not supported by x265
       "test_open_heif_compare_non_standard_modes_data"
       "test_open_save_disable_16bit"
diff --git a/pkgs/development/python-modules/pillow-simd/default.nix b/pkgs/development/python-modules/pillow-simd/default.nix
index e913a10b4fbf..79b046f50cc6 100644
--- a/pkgs/development/python-modules/pillow-simd/default.nix
+++ b/pkgs/development/python-modules/pillow-simd/default.nix
@@ -44,7 +44,7 @@ import ../pillow/generic.nix (
     };
 
     meta = with lib; {
-      broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+      broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
       homepage = "https://python-pillow.github.io/pillow-perf/";
       description = "Friendly PIL fork - SIMD version";
       longDescription = ''
diff --git a/pkgs/development/python-modules/pillow/generic.nix b/pkgs/development/python-modules/pillow/generic.nix
index 36fe5b0421fe..1ecaea6b205d 100644
--- a/pkgs/development/python-modules/pillow/generic.nix
+++ b/pkgs/development/python-modules/pillow/generic.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
       "test_basic"
       "test_custom_metadata"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Disable darwin tests which require executables: `iconutil` and `screencapture`
       "test_grab"
       "test_grabclipboard"
diff --git a/pkgs/development/python-modules/pint-pandas/default.nix b/pkgs/development/python-modules/pint-pandas/default.nix
index 3e7f18366266..67e1f109c8e0 100644
--- a/pkgs/development/python-modules/pint-pandas/default.nix
+++ b/pkgs/development/python-modules/pint-pandas/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ pytestCheckHook ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Pandas support for pint";
     license = lib.licenses.bsd3;
     homepage = "https://github.com/hgrecco/pint-pandas";
diff --git a/pkgs/development/python-modules/pip-tools/default.nix b/pkgs/development/python-modules/pip-tools/default.nix
index 10f83a4203d8..9d44c2e383e0 100644
--- a/pkgs/development/python-modules/pip-tools/default.nix
+++ b/pkgs/development/python-modules/pip-tools/default.nix
@@ -50,7 +50,7 @@ buildPythonPackage rec {
     tomli-w
   ];
 
-  preCheck = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  preCheck = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     # https://github.com/python/cpython/issues/74570#issuecomment-1093748531
     export no_proxy='*';
   '';
diff --git a/pkgs/development/python-modules/playwright/default.nix b/pkgs/development/python-modules/playwright/default.nix
index 6ad0fe9b1dc6..e27e2a33ca30 100644
--- a/pkgs/development/python-modules/playwright/default.nix
+++ b/pkgs/development/python-modules/playwright/default.nix
@@ -74,7 +74,7 @@ buildPythonPackage rec {
     git
     setuptools-scm
     setuptools
-  ] ++ lib.optionals stdenv.isLinux [ auditwheel ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ auditwheel ];
 
   pythonRelaxDeps = [ "pyee" ];
 
@@ -99,7 +99,7 @@ buildPythonPackage rec {
         driver = playwright-driver;
         browsers = playwright-driver.browsers;
       }
-      // lib.optionalAttrs stdenv.isLinux {
+      // lib.optionalAttrs stdenv.hostPlatform.isLinux {
         inherit (nixosTests) playwright-python;
       };
     updateScript = ./update.sh;
diff --git a/pkgs/development/python-modules/plyer/default.nix b/pkgs/development/python-modules/plyer/default.nix
index 6a77e4a56005..f0398ac86235 100644
--- a/pkgs/development/python-modules/plyer/default.nix
+++ b/pkgs/development/python-modules/plyer/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "plyer" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Plyer is a platform-independent api to use features commonly found on various platforms";
     homepage = "https://github.com/kivy/plyer";
     license = licenses.mit;
diff --git a/pkgs/development/python-modules/polars/default.nix b/pkgs/development/python-modules/polars/default.nix
index 7535ae218c54..a1eeda11a3af 100644
--- a/pkgs/development/python-modules/polars/default.nix
+++ b/pkgs/development/python-modules/polars/default.nix
@@ -70,7 +70,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ rust-jemalloc-sys' ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.AppKit
       darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/development/python-modules/powerline/default.nix b/pkgs/development/python-modules/powerline/default.nix
index 6e1f724a35dd..76bab717715f 100644
--- a/pkgs/development/python-modules/powerline/default.nix
+++ b/pkgs/development/python-modules/powerline/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
     python-hglib
     pygit2
     pyuv
-  ] ++ lib.optionals (!stdenv.isDarwin) [ i3ipc ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ i3ipc ];
 
   # tests are travis-specific
   doCheck = false;
diff --git a/pkgs/development/python-modules/ppft/default.nix b/pkgs/development/python-modules/ppft/default.nix
index 53eaa5657e7a..a2672cc5e45e 100644
--- a/pkgs/development/python-modules/ppft/default.nix
+++ b/pkgs/development/python-modules/ppft/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ six ];
 
   # darwin seems to hang
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/development/python-modules/pre-commit-hooks/default.nix b/pkgs/development/python-modules/pre-commit-hooks/default.nix
index 646d2b343518..55058f846d08 100644
--- a/pkgs/development/python-modules/pre-commit-hooks/default.nix
+++ b/pkgs/development/python-modules/pre-commit-hooks/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
 
   # Note: this is not likely to ever work on Darwin
   # https://github.com/pre-commit/pre-commit-hooks/pull/655
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # the tests require a functional git installation which requires a valid HOME
   # directory.
diff --git a/pkgs/development/python-modules/primer3/default.nix b/pkgs/development/python-modules/primer3/default.nix
index 336042e595d4..83f57c4a70e3 100644
--- a/pkgs/development/python-modules/primer3/default.nix
+++ b/pkgs/development/python-modules/primer3/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   nativeBuildInputs = [
     cython
     setuptools
-  ] ++ lib.optionals stdenv.isDarwin [ gcc ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ gcc ];
 
   nativeCheckInputs = [
     click
diff --git a/pkgs/development/python-modules/prox-tv/default.nix b/pkgs/development/python-modules/prox-tv/default.nix
index 7502d2daf3cc..ee2862361081 100644
--- a/pkgs/development/python-modules/prox-tv/default.nix
+++ b/pkgs/development/python-modules/prox-tv/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  disabledTests = [ "test_tvp_1d" ] ++ lib.optionals stdenv.isDarwin [ "test_tv2_1d" ];
+  disabledTests = [ "test_tvp_1d" ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_tv2_1d" ];
 
   meta = with lib; {
     homepage = "https://github.com/albarji/proxTV";
diff --git a/pkgs/development/python-modules/psrpcore/default.nix b/pkgs/development/python-modules/psrpcore/default.nix
index 72c8da5f5407..8003780b86c2 100644
--- a/pkgs/development/python-modules/psrpcore/default.nix
+++ b/pkgs/development/python-modules/psrpcore/default.nix
@@ -43,6 +43,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/jborean93/psrpcore/blob/v${version}/CHANGELOG.md";
     license = licenses.mit;
     maintainers = with maintainers; [ fab ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/psutil/default.nix b/pkgs/development/python-modules/psutil/default.nix
index 4c0a93d2faa4..ee3f390b79af 100644
--- a/pkgs/development/python-modules/psutil/default.nix
+++ b/pkgs/development/python-modules/psutil/default.nix
@@ -34,14 +34,14 @@ buildPythonPackage rec {
 
   buildInputs =
     # workaround for https://github.com/NixOS/nixpkgs/issues/146760
-    lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ CoreFoundation ]
-    ++ lib.optionals stdenv.isDarwin [ IOKit ];
+    lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ CoreFoundation ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
   # Segfaults on darwin:
   # https://github.com/giampaolo/psutil/issues/1715
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # In addition to the issues listed above there are some that occure due to
   # our sandboxing which we can work around by disabling some tests:
diff --git a/pkgs/development/python-modules/psycopg/default.nix b/pkgs/development/python-modules/psycopg/default.nix
index e74f113f3c84..aaaf362eab3a 100644
--- a/pkgs/development/python-modules/psycopg/default.nix
+++ b/pkgs/development/python-modules/psycopg/default.nix
@@ -174,7 +174,7 @@ buildPythonPackage rec {
       pytestCheckHook
       postgresql
     ]
-    ++ lib.optional (stdenv.isLinux) postgresqlTestHook
+    ++ lib.optional (stdenv.hostPlatform.isLinux) postgresqlTestHook
     ++ passthru.optional-dependencies.c
     ++ passthru.optional-dependencies.pool;
 
@@ -188,7 +188,7 @@ buildPythonPackage rec {
     ''
       cd ..
     ''
-    + lib.optionalString (stdenv.isLinux) ''
+    + lib.optionalString (stdenv.hostPlatform.isLinux) ''
       export PSYCOPG_TEST_DSN="host=/build/run/postgresql user=$PGUSER"
     '';
 
diff --git a/pkgs/development/python-modules/psycopg2/default.nix b/pkgs/development/python-modules/psycopg2/default.nix
index c8959b948fd7..aaab94547a02 100644
--- a/pkgs/development/python-modules/psycopg2/default.nix
+++ b/pkgs/development/python-modules/psycopg2/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
     sphinx-better-theme
   ];
 
-  buildInputs = [ postgresql ] ++ lib.optionals stdenv.isDarwin [ openssl ];
+  buildInputs = [ postgresql ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ openssl ];
 
   sphinxRoot = "doc/src";
 
diff --git a/pkgs/development/python-modules/psycopg2cffi/default.nix b/pkgs/development/python-modules/psycopg2cffi/default.nix
index b8c86c970a84..4201bd154071 100644
--- a/pkgs/development/python-modules/psycopg2cffi/default.nix
+++ b/pkgs/development/python-modules/psycopg2cffi/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
   ];
 
   # FATAL: could not create shared memory segment: Operation not permitted
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     postgresqlTestHook
diff --git a/pkgs/development/python-modules/pwntools/default.nix b/pkgs/development/python-modules/pwntools/default.nix
index 390c65120854..6874fd866e82 100644
--- a/pkgs/development/python-modules/pwntools/default.nix
+++ b/pkgs/development/python-modules/pwntools/default.nix
@@ -82,7 +82,7 @@ buildPythonPackage rec {
     installShellCompletion --bash extra/bash_completion.d/shellcraft
   '';
 
-  postFixup = lib.optionalString (!stdenv.isDarwin) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir -p "$out/bin"
     makeWrapper "${debugger}/bin/${debuggerName}" "$out/bin/pwntools-gdb"
   '';
diff --git a/pkgs/development/python-modules/py-bip39-bindings/default.nix b/pkgs/development/python-modules/py-bip39-bindings/default.nix
index 24521f5289ac..72ea11e58522 100644
--- a/pkgs/development/python-modules/py-bip39-bindings/default.nix
+++ b/pkgs/development/python-modules/py-bip39-bindings/default.nix
@@ -43,7 +43,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/py-cpuinfo/default.nix b/pkgs/development/python-modules/py-cpuinfo/default.nix
index cf734872942d..8485fe8c2837 100644
--- a/pkgs/development/python-modules/py-cpuinfo/default.nix
+++ b/pkgs/development/python-modules/py-cpuinfo/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ pytestCheckHook ];
 
   # On Darwin sysctl is used to read CPU information.
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace cpuinfo/cpuinfo.py \
       --replace "len(_program_paths('sysctl')) > 0" "True" \
       --replace "_run_and_get_stdout(['sysctl'" "_run_and_get_stdout(['${sysctl}/bin/sysctl'"
diff --git a/pkgs/development/python-modules/py-libzfs/default.nix b/pkgs/development/python-modules/py-libzfs/default.nix
index 1400a066c522..b5d8e7f4ab29 100644
--- a/pkgs/development/python-modules/py-libzfs/default.nix
+++ b/pkgs/development/python-modules/py-libzfs/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
   buildInputs = [ zfs ];
 
   # Passing CFLAGS in configureFlags does not work, see https://github.com/truenas/py-libzfs/issues/107
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace configure \
       --replace-fail \
         'CFLAGS="-DCYTHON_FALLTHROUGH"' \
diff --git a/pkgs/development/python-modules/py-sr25519-bindings/default.nix b/pkgs/development/python-modules/py-sr25519-bindings/default.nix
index 51915de513a7..123562c8d21a 100644
--- a/pkgs/development/python-modules/py-sr25519-bindings/default.nix
+++ b/pkgs/development/python-modules/py-sr25519-bindings/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeCheckInputs = [
     pytestCheckHook
diff --git a/pkgs/development/python-modules/py3exiv2/default.nix b/pkgs/development/python-modules/py3exiv2/default.nix
index 38bdf6c4c18d..e9f0efe24030 100644
--- a/pkgs/development/python-modules/py3exiv2/default.nix
+++ b/pkgs/development/python-modules/py3exiv2/default.nix
@@ -27,7 +27,7 @@ buildPythonPackage rec {
   ];
 
   # Work around Python distutils compiling C++ with $CC (see issue #26709)
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   pythonImportsCheck = [ "pyexiv2" ];
 
@@ -35,7 +35,7 @@ buildPythonPackage rec {
   doCheck = false;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Python binding to the library exiv2";
     homepage = "https://launchpad.net/py3exiv2";
     license = licenses.gpl3Plus;
diff --git a/pkgs/development/python-modules/pyarrow/default.nix b/pkgs/development/python-modules/pyarrow/default.nix
index 3c9b1d3bc211..e22429f0716f 100644
--- a/pkgs/development/python-modules/pyarrow/default.nix
+++ b/pkgs/development/python-modules/pyarrow/default.nix
@@ -122,7 +122,7 @@ buildPythonPackage rec {
       # expects arrow-cpp headers to be bundled
       "--deselect=pyarrow/tests/test_cpp_internals.py::test_pyarrow_include"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Requires loopback networking
       "--deselect=pyarrow/tests/test_ipc.py::test_socket_"
       "--deselect=pyarrow/tests/test_flight.py::test_never_sends_data"
@@ -136,7 +136,7 @@ buildPythonPackage rec {
       # Repr output is printing number instead of enum name so these tests fail
       "--deselect=pyarrow/tests/test_fs.py::test_get_file_info"
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       # this test requires local networking
       "--deselect=pyarrow/tests/test_fs.py::test_filesystem_from_uri_gcs"
     ];
@@ -152,7 +152,7 @@ buildPythonPackage rec {
       mv pyarrow/conftest.py pyarrow/tests/parent_conftest.py
       substituteInPlace pyarrow/tests/conftest.py --replace ..conftest .parent_conftest
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # OSError: [Errno 24] Too many open files
       ulimit -n 1024
     '';
diff --git a/pkgs/development/python-modules/pyatv/default.nix b/pkgs/development/python-modules/pyatv/default.nix
index bf3fe63b474b..3ffed8bd8acd 100644
--- a/pkgs/development/python-modules/pyatv/default.nix
+++ b/pkgs/development/python-modules/pyatv/default.nix
@@ -95,7 +95,7 @@ buildPythonPackage rec {
       # https://github.com/postlund/pyatv/issues/2365
       "test_simple_dispatch"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # tests/protocols/raop/test_raop_functional.py::test_stream_retransmission[raop_properties2-2-True] - assert False
       "test_stream_retransmission"
     ];
diff --git a/pkgs/development/python-modules/pybind11/default.nix b/pkgs/development/python-modules/pybind11/default.nix
index 6dab8d700d1e..750ee618f9d2 100644
--- a/pkgs/development/python-modules/pybind11/default.nix
+++ b/pkgs/development/python-modules/pybind11/default.nix
@@ -33,7 +33,7 @@ let
   # support for C++17 aligned allocations on macOS.
   # Tell clang we’re targeting 10.13 on x86_64-darwin while continuing to use the default SDK.
   stdenv' =
-    if stdenv.isDarwin && stdenv.isx86_64 then
+    if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then
       python.stdenv.override (oldStdenv: {
         buildPlatform = oldStdenv.buildPlatform // {
           darwinMinVersion = "10.13";
@@ -115,7 +115,7 @@ buildPythonPackage rec {
     "tests/extra_setuptools/test_setuphelper.py"
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # expects KeyError, gets RuntimeError
     # https://github.com/pybind/pybind11/issues/4243
     "test_cross_module_exception_translator"
diff --git a/pkgs/development/python-modules/pybluez/default.nix b/pkgs/development/python-modules/pybluez/default.nix
index d3842358db2f..ca745113c592 100644
--- a/pkgs/development/python-modules/pybluez/default.nix
+++ b/pkgs/development/python-modules/pybluez/default.nix
@@ -36,6 +36,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/pybluez/pybluez";
     license = licenses.gpl2;
     maintainers = with maintainers; [ leenaars ];
-    broken = stdenv.isDarwin; # requires pyobjc-core, pyobjc-framework-Cocoa
+    broken = stdenv.hostPlatform.isDarwin; # requires pyobjc-core, pyobjc-framework-Cocoa
   };
 }
diff --git a/pkgs/development/python-modules/pyclip/default.nix b/pkgs/development/python-modules/pyclip/default.nix
index 65f9afc40903..631bebd566bf 100644
--- a/pkgs/development/python-modules/pyclip/default.nix
+++ b/pkgs/development/python-modules/pyclip/default.nix
@@ -30,19 +30,19 @@ buildPythonPackage rec {
 
   nativeCheckInputs =
     [ pytest ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       xclip
       xvfb-run
     ];
 
   checkPhase = ''
     runHook preCheck
-    ${lib.optionalString stdenv.isLinux "xvfb-run -s '-screen 0 800x600x24'"} pytest tests
+    ${lib.optionalString stdenv.hostPlatform.isLinux "xvfb-run -s '-screen 0 800x600x24'"} pytest tests
     runHook postCheck
   '';
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Cross-platform clipboard utilities supporting both binary and text data";
     mainProgram = "pyclip";
     homepage = "https://github.com/spyoungtech/pyclip";
diff --git a/pkgs/development/python-modules/pycookiecheat/default.nix b/pkgs/development/python-modules/pycookiecheat/default.nix
index be5d6f82cba6..97b7d7d48c8d 100644
--- a/pkgs/development/python-modules/pycookiecheat/default.nix
+++ b/pkgs/development/python-modules/pycookiecheat/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
     "test_load_firefox_cookie_db"
     "test_no_cookies"
     "test_warns_for_string_browser"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_slack_config" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_slack_config" ];
 
   meta = with lib; {
     description = "Borrow cookies from your browser's authenticated session for use in Python scripts";
diff --git a/pkgs/development/python-modules/pycrdt/default.nix b/pkgs/development/python-modules/pycrdt/default.nix
index f95b0d7d21d4..c09682e63612 100644
--- a/pkgs/development/python-modules/pycrdt/default.nix
+++ b/pkgs/development/python-modules/pycrdt/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   dependencies = [ anyio ];
 
diff --git a/pkgs/development/python-modules/pycups/default.nix b/pkgs/development/python-modules/pycups/default.nix
index 79c1646b1059..8a89193a64eb 100644
--- a/pkgs/development/python-modules/pycups/default.nix
+++ b/pkgs/development/python-modules/pycups/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
     hash = "sha256-hD44XB2/aUmWyoTvAqfzDCg3YDVYj1++rNa64AXPfI0=";
   };
 
-  buildInputs = [ cups ] ++ lib.optional stdenv.isDarwin libiconv;
+  buildInputs = [ cups ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   # Wants to connect to CUPS
   doCheck = false;
diff --git a/pkgs/development/python-modules/pycurl/default.nix b/pkgs/development/python-modules/pycurl/default.nix
index 689e23e3c1ae..5f9334ebb1ee 100644
--- a/pkgs/development/python-modules/pycurl/default.nix
+++ b/pkgs/development/python-modules/pycurl/default.nix
@@ -77,7 +77,7 @@ buildPythonPackage rec {
       # https://github.com/pycurl/pycurl/issues/836
       "test_proxy_tlsauth"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # Fatal Python error: Segmentation fault
       "cadata_test"
     ];
diff --git a/pkgs/development/python-modules/pydantic-core/default.nix b/pkgs/development/python-modules/pydantic-core/default.nix
index 48e8f7188bce..77d339525878 100644
--- a/pkgs/development/python-modules/pydantic-core/default.nix
+++ b/pkgs/development/python-modules/pydantic-core/default.nix
@@ -47,7 +47,7 @@ let
       typing-extensions
     ];
 
-    buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+    buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
     dependencies = [ typing-extensions ];
 
diff --git a/pkgs/development/python-modules/pydevd/default.nix b/pkgs/development/python-modules/pydevd/default.nix
index 8cb99dd9806f..207e5e5c9edf 100644
--- a/pkgs/development/python-modules/pydevd/default.nix
+++ b/pkgs/development/python-modules/pydevd/default.nix
@@ -72,7 +72,7 @@ buildPythonPackage rec {
       # https://github.com/fabioz/PyDev.Debugger/issues/269
       "test_evaluate_expression"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_multiprocessing_simple"
       "test_evaluate_exception_trace"
     ];
diff --git a/pkgs/development/python-modules/pydicom/default.nix b/pkgs/development/python-modules/pydicom/default.nix
index e2d86333c1cc..94822a24d444 100644
--- a/pkgs/development/python-modules/pydicom/default.nix
+++ b/pkgs/development/python-modules/pydicom/default.nix
@@ -66,11 +66,11 @@ buildPythonPackage {
       # tries to remove a dicom inside $HOME/.pydicom/data/ and download it again
       "test_fetch_data_files"
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       # https://github.com/pydicom/pydicom/issues/1386
       "test_array"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # flaky, hard to reproduce failure outside hydra
       "test_time_check"
     ];
diff --git a/pkgs/development/python-modules/pyeclib/default.nix b/pkgs/development/python-modules/pyeclib/default.nix
index 0ada1b1306bd..bda40cbeb8d3 100644
--- a/pkgs/development/python-modules/pyeclib/default.nix
+++ b/pkgs/development/python-modules/pyeclib/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
 
   preBuild =
     let
-      ldLibraryPathEnvName = if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+      ldLibraryPathEnvName = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     in
     ''
       # required for the custom _find_library function in setup.py
diff --git a/pkgs/development/python-modules/pyfakefs/default.nix b/pkgs/development/python-modules/pyfakefs/default.nix
index ff29175870ab..0486b2b7f665 100644
--- a/pkgs/development/python-modules/pyfakefs/default.nix
+++ b/pkgs/development/python-modules/pyfakefs/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
         --replace "test_path_links_not_resolved" "notest_path_links_not_resolved" \
         --replace "test_append_mode_tell_linux_windows" "notest_append_mode_tell_linux_windows"
     ''
-    + (lib.optionalString stdenv.isDarwin ''
+    + (lib.optionalString stdenv.hostPlatform.isDarwin ''
       # this test fails on darwin due to case-insensitive file system
       substituteInPlace pyfakefs/tests/fake_os_test.py \
         --replace "test_rename_dir_to_existing_dir" "notest_rename_dir_to_existing_dir"
diff --git a/pkgs/development/python-modules/pygame-ce/default.nix b/pkgs/development/python-modules/pygame-ce/default.nix
index c4af9f668e72..5c9e2432c822 100644
--- a/pkgs/development/python-modules/pygame-ce/default.nix
+++ b/pkgs/development/python-modules/pygame-ce/default.nix
@@ -77,7 +77,7 @@ buildPythonPackage rec {
         --replace-fail 'path="fc-list"' 'path="${fontconfig}/bin/fc-list"' \
         --replace-fail /usr/X11/bin/fc-list ${fontconfig}/bin/fc-list
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # flaky
       rm test/system_test.py
       substituteInPlace test/meson.build \
@@ -102,7 +102,7 @@ buildPythonPackage rec {
     SDL2_image
     SDL2_mixer
     SDL2_ttf
-  ] ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   nativeCheckInputs = [
     numpy
diff --git a/pkgs/development/python-modules/pygame/default.nix b/pkgs/development/python-modules/pygame/default.nix
index 65315b3243b8..94efd4227e2e 100644
--- a/pkgs/development/python-modules/pygame/default.nix
+++ b/pkgs/development/python-modules/pygame/default.nix
@@ -99,7 +99,7 @@ buildPythonPackage rec {
     SDL2_image
     SDL2_mixer
     SDL2_ttf
-  ] ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   preConfigure = ''
     ${python.pythonOnBuildForHost.interpreter} buildconfig/config.py
diff --git a/pkgs/development/python-modules/pygit2/default.nix b/pkgs/development/python-modules/pygit2/default.nix
index 80cd4b04b409..db08e6efe974 100644
--- a/pkgs/development/python-modules/pygit2/default.nix
+++ b/pkgs/development/python-modules/pygit2/default.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
     hash = "sha256-pjVSX/x0EoZp3i9jRgqUydVgljSkh1wKr85RD97sF6w=";
   };
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH="${libgit2}/lib"
   '';
 
diff --git a/pkgs/development/python-modules/pygls/default.nix b/pkgs/development/python-modules/pygls/default.nix
index c75cf68715ed..8128de3769b9 100644
--- a/pkgs/development/python-modules/pygls/default.nix
+++ b/pkgs/development/python-modules/pygls/default.nix
@@ -52,7 +52,7 @@ buildPythonPackage rec {
   # Fixes hanging tests on Darwin
   __darwinAllowLocalNetworking = true;
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Darwin issue: OSError: [Errno 24] Too many open files
     ulimit -n 1024
   '';
diff --git a/pkgs/development/python-modules/pygmt/default.nix b/pkgs/development/python-modules/pygmt/default.nix
index 77d2669ee0ac..852690233304 100644
--- a/pkgs/development/python-modules/pygmt/default.nix
+++ b/pkgs/development/python-modules/pygmt/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage rec {
     license = licenses.bsd3;
     changelog = "https://github.com/GenericMappingTools/pygmt/releases/tag/v${version}";
     # pygmt.exceptions.GMTCLibNotFoundError: Error loading the GMT shared library '/nix/store/r3xnnqgl89vrnq0kzxx0bmjwzks45mz8-gmt-6.1.1/lib/libgmt.dylib'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ sikmir ];
   };
 }
diff --git a/pkgs/development/python-modules/pygobject/3.nix b/pkgs/development/python-modules/pygobject/3.nix
index 185e7fd5ddf8..1f4592c7ddcf 100644
--- a/pkgs/development/python-modules/pygobject/3.nix
+++ b/pkgs/development/python-modules/pygobject/3.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
   buildInputs = [
     cairo
     glib
-  ] ++ lib.optionals stdenv.isDarwin [ ncurses ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ ncurses ];
 
   propagatedBuildInputs = [
     pycairo
diff --git a/pkgs/development/python-modules/pyhanko/default.nix b/pkgs/development/python-modules/pyhanko/default.nix
index f8cf0d88cbf2..cf46658aec26 100644
--- a/pkgs/development/python-modules/pyhanko/default.nix
+++ b/pkgs/development/python-modules/pyhanko/default.nix
@@ -130,6 +130,6 @@ buildPythonPackage rec {
     maintainers = [ ];
     # Most tests fail with:
     # OSError: One or more parameters passed to a function were not valid.
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/pyheck/default.nix b/pkgs/development/python-modules/pyheck/default.nix
index 7b7e5205447f..fca55ff984b5 100644
--- a/pkgs/development/python-modules/pyheck/default.nix
+++ b/pkgs/development/python-modules/pyheck/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/pylance/default.nix b/pkgs/development/python-modules/pylance/default.nix
index 95e9cc8326cd..ff66678e664a 100644
--- a/pkgs/development/python-modules/pylance/default.nix
+++ b/pkgs/development/python-modules/pylance/default.nix
@@ -65,7 +65,7 @@ buildPythonPackage rec {
       libiconv
       protobuf
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         Security
@@ -100,7 +100,7 @@ buildPythonPackage rec {
     cd python/python/tests
   '';
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # AttributeError: module 'torch.distributed' has no attribute 'is_initialized'
     "test_convert_int_tensors"
     "test_ground_truth"
@@ -127,6 +127,6 @@ buildPythonPackage rec {
     maintainers = with lib.maintainers; [ natsukium ];
     # test_indices.py ...sss.Fatal Python error: Fatal Python error: Illegal instructionIllegal instruction
     # File "/nix/store/wiiccrs0vd1qbh4j6ki9p40xmamsjix3-python3.12-pylance-0.17.0/lib/python3.12/site-packages/lance/indices.py", line 237 in train_ivf
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/development/python-modules/pylibjpeg-openjpeg/default.nix b/pkgs/development/python-modules/pylibjpeg-openjpeg/default.nix
index 33f1b807ac50..18ee261ff694 100644
--- a/pkgs/development/python-modules/pylibjpeg-openjpeg/default.nix
+++ b/pkgs/development/python-modules/pylibjpeg-openjpeg/default.nix
@@ -71,6 +71,6 @@ buildPythonPackage rec {
     maintainers = with lib.maintainers; [ bcdarwin ];
     # x86-linux: test_encode.py::TestEncodeBuffer failures
     # darwin: numerous test failures, seemingly due to issues setting up test data
-    broken = (stdenv.isAarch64 && stdenv.isLinux) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) || stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/pylint/default.nix b/pkgs/development/python-modules/pylint/default.nix
index 73976a1d60e0..9076d39d83f6 100644
--- a/pkgs/development/python-modules/pylint/default.nix
+++ b/pkgs/development/python-modules/pylint/default.nix
@@ -101,7 +101,7 @@ buildPythonPackage rec {
       # AssertionError: assert [('specializa..., 'Ancestor')] == [('aggregatio..., 'Ancestor')]
       "test_functional_relation_extraction"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_parallel_execution"
       "test_py3k_jobs_option"
     ];
diff --git a/pkgs/development/python-modules/pymemcache/default.nix b/pkgs/development/python-modules/pymemcache/default.nix
index c80f512e7498..6f570f8d8306 100644
--- a/pkgs/development/python-modules/pymemcache/default.nix
+++ b/pkgs/development/python-modules/pymemcache/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
     sed -i "/--cov/d" setup.cfg
   '';
 
-  disabledTests = lib.optionals stdenv.is32bit [
+  disabledTests = lib.optionals stdenv.hostPlatform.is32bit [
     # test_compressed_complex is broken on 32-bit platforms
     # this can be removed on the next version bump
     # see also https://github.com/pinterest/pymemcache/pull/480
diff --git a/pkgs/development/python-modules/pymunk/default.nix b/pkgs/development/python-modules/pymunk/default.nix
index cb23141284d7..212e8e54dd24 100644
--- a/pkgs/development/python-modules/pymunk/default.nix
+++ b/pkgs/development/python-modules/pymunk/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ cffi ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ ApplicationServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ ApplicationServices ];
 
   preBuild = ''
     ${python.pythonOnBuildForHost.interpreter} setup.py build_ext --inplace
diff --git a/pkgs/development/python-modules/pymupdf/default.nix b/pkgs/development/python-modules/pymupdf/default.nix
index f54a8b7a8462..4ee28f0b6208 100644
--- a/pkgs/development/python-modules/pymupdf/default.nix
+++ b/pkgs/development/python-modules/pymupdf/default.nix
@@ -88,7 +88,7 @@ buildPythonPackage rec {
   };
 
   # TODO: manually add mupdf rpath until upstream fixes it
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for lib in */*.so $out/${python.sitePackages}/*/*.so; do
       install_name_tool -add_rpath ${lib.getLib mupdf-cxx}/lib "$lib"
     done
@@ -175,7 +175,7 @@ buildPythonPackage rec {
       # Exclude lint tests
       "test_flake8"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # darwin does not support OCR right now
       "test_tesseract"
     ];
diff --git a/pkgs/development/python-modules/pync/default.nix b/pkgs/development/python-modules/pync/default.nix
index 9206787f4973..46af3ed5db2f 100644
--- a/pkgs/development/python-modules/pync/default.nix
+++ b/pkgs/development/python-modules/pync/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ which ];
   propagatedBuildInputs = [ python-dateutil ];
 
-  preInstall = lib.optionalString stdenv.isDarwin ''
+  preInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's|^\([ ]*\)self.bin_path.*$|\1self.bin_path = "${pkgs.terminal-notifier}/bin/terminal-notifier"|' build/lib/pync/TerminalNotifier.py
   '';
 
diff --git a/pkgs/development/python-modules/pynput/default.nix b/pkgs/development/python-modules/pynput/default.nix
index ed6b964f0ca5..6d73c35e5ba6 100644
--- a/pkgs/development/python-modules/pynput/default.nix
+++ b/pkgs/development/python-modules/pynput/default.nix
@@ -44,11 +44,11 @@ buildPythonPackage rec {
 
   propagatedBuildInputs =
     [ six ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       evdev
       xlib
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         ApplicationServices
@@ -61,7 +61,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ unittestCheckHook ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Library to control and monitor input devices";
     homepage = "https://github.com/moses-palmer/pynput";
     license = licenses.lgpl3;
diff --git a/pkgs/development/python-modules/pyocd/default.nix b/pkgs/development/python-modules/pyocd/default.nix
index 15a0a2dbdbfa..bb10f1881118 100644
--- a/pkgs/development/python-modules/pyocd/default.nix
+++ b/pkgs/development/python-modules/pyocd/default.nix
@@ -63,7 +63,7 @@ buildPythonPackage rec {
     pyusb
     pyyaml
     typing-extensions
-  ] ++ lib.optionals (!stdenv.isLinux) [ hidapi ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isLinux) [ hidapi ];
 
   pythonImportsCheck = [ "pyocd" ];
 
diff --git a/pkgs/development/python-modules/pyopencl/default.nix b/pkgs/development/python-modules/pyopencl/default.nix
index 6ec97843fa8f..edf4a4bfe7a2 100644
--- a/pkgs/development/python-modules/pyopencl/default.nix
+++ b/pkgs/development/python-modules/pyopencl/default.nix
@@ -27,7 +27,7 @@
 
 let
   os-specific-buildInputs =
-    if stdenv.isDarwin then [ darwin.apple_sdk.frameworks.OpenCL ] else [ ocl-icd ];
+    if stdenv.hostPlatform.isDarwin then [ darwin.apple_sdk.frameworks.OpenCL ] else [ ocl-icd ];
 in
 buildPythonPackage rec {
   pname = "pyopencl";
@@ -92,6 +92,6 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ GaetanLepage ];
     # ld: symbol(s) not found for architecture arm64
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/python-modules/pyopengl/default.nix b/pkgs/development/python-modules/pyopengl/default.nix
index a66fcc6463a4..a4c4b1cbf21d 100644
--- a/pkgs/development/python-modules/pyopengl/default.nix
+++ b/pkgs/development/python-modules/pyopengl/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
     let
       ext = stdenv.hostPlatform.extensions.sharedLibrary;
     in
-    lib.optionalString (!stdenv.isDarwin) ''
+    lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       # Theses lines are patching the name of dynamic libraries
       # so pyopengl can find them at runtime.
       substituteInPlace OpenGL/platform/glx.py \
diff --git a/pkgs/development/python-modules/pyopengltk/default.nix b/pkgs/development/python-modules/pyopengltk/default.nix
index 2f0440d83daf..b50780336e50 100644
--- a/pkgs/development/python-modules/pyopengltk/default.nix
+++ b/pkgs/development/python-modules/pyopengltk/default.nix
@@ -46,6 +46,6 @@ buildPythonPackage rec {
     maintainers = with lib.maintainers; [ sigmanificient ];
     license = lib.licenses.mit;
     # not supported yet, see: https://github.com/jonwright/pyopengltk/issues/12
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/pyopenssl/default.nix b/pkgs/development/python-modules/pyopenssl/default.nix
index b9691b2a2827..0d8ae7f649eb 100644
--- a/pkgs/development/python-modules/pyopenssl/default.nix
+++ b/pkgs/development/python-modules/pyopenssl/default.nix
@@ -90,7 +90,7 @@ buildPythonPackage rec {
       "test_dump_certificate_request"
       "test_export_text"
     ]
-    ++ lib.optionals stdenv.is32bit [
+    ++ lib.optionals stdenv.hostPlatform.is32bit [
       # https://github.com/pyca/pyopenssl/issues/974
       "test_verify_with_time"
     ];
diff --git a/pkgs/development/python-modules/pyparted/default.nix b/pkgs/development/python-modules/pyparted/default.nix
index ebdd762b6d06..24acecdaf8c2 100644
--- a/pkgs/development/python-modules/pyparted/default.nix
+++ b/pkgs/development/python-modules/pyparted/default.nix
@@ -29,7 +29,7 @@ buildPythonPackage rec {
         s|e\.path\.startswith("/tmp/temp-device-")|"temp-device-" in e.path|
       ' tests/test__ped_ped.py
     ''
-    + lib.optionalString stdenv.isi686 ''
+    + lib.optionalString stdenv.hostPlatform.isi686 ''
       # remove some integers in this test case which overflow on 32bit systems
       sed -i -r -e '/class *UnitGetSizeTestCase/,/^$/{/[0-9]{11}/d}' \
         tests/test__ped_ped.py
diff --git a/pkgs/development/python-modules/pypass/default.nix b/pkgs/development/python-modules/pypass/default.nix
index 784a5e213c3b..1b9dc08d6720 100644
--- a/pkgs/development/python-modules/pypass/default.nix
+++ b/pkgs/development/python-modules/pypass/default.nix
@@ -74,7 +74,7 @@ buildPythonPackage rec {
   disabledTests = [ "test_show_clip" ];
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Password manager pass in Python";
     mainProgram = "pypass";
     homepage = "https://github.com/aviau/python-pass";
diff --git a/pkgs/development/python-modules/pypck/default.nix b/pkgs/development/python-modules/pypck/default.nix
index d2ee3050522f..e39adf256656 100644
--- a/pkgs/development/python-modules/pypck/default.nix
+++ b/pkgs/development/python-modules/pypck/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
 
   pytestFlagsArray = [ "--asyncio-mode=auto" ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [ "test_connection_lost" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "test_connection_lost" ];
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/pyperscan/default.nix b/pkgs/development/python-modules/pyperscan/default.nix
index fae3060a744a..7f2bde698eb8 100644
--- a/pkgs/development/python-modules/pyperscan/default.nix
+++ b/pkgs/development/python-modules/pyperscan/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
 
   checkInputs = [ pytestCheckHook ];
 
-  buildInputs = [ vectorscan ] ++ lib.optional stdenv.isDarwin libiconv;
+  buildInputs = [ vectorscan ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   pythonImportsCheck = [ "pyperscan" ];
 
diff --git a/pkgs/development/python-modules/pyqt/5.x.nix b/pkgs/development/python-modules/pyqt/5.x.nix
index 2fdd86b3b5ea..5e1c96673555 100644
--- a/pkgs/development/python-modules/pyqt/5.x.nix
+++ b/pkgs/development/python-modules/pyqt/5.x.nix
@@ -23,7 +23,7 @@
   withSerialPort ? false,
   withTools ? false,
   pkgsBuildTarget,
-  dbusSupport ? !stdenv.isDarwin,
+  dbusSupport ? !stdenv.hostPlatform.isDarwin,
 }:
 
 buildPythonPackage rec {
@@ -59,7 +59,7 @@ buildPythonPackage rec {
     # Due to bug in SIP .whl name generation we have to bump minimal macos sdk upto 11.0 for
     # aarch64-darwin. This patch can be removed once SIP will fix it in upstream,
     # see https://github.com/NixOS/nixpkgs/pull/186612#issuecomment-1214635456.
-    + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
       minimum-macos-version = "11.0"
     ''
     + ''
diff --git a/pkgs/development/python-modules/pyqt/6.x.nix b/pkgs/development/python-modules/pyqt/6.x.nix
index 8c5653826d25..9f031347d354 100644
--- a/pkgs/development/python-modules/pyqt/6.x.nix
+++ b/pkgs/development/python-modules/pyqt/6.x.nix
@@ -118,7 +118,7 @@ buildPythonPackage rec {
       setuptools
     ]
     # ld: library not found for -lcups
-    ++ lib.optionals (withPrintSupport && stdenv.isDarwin) [ cups ];
+    ++ lib.optionals (withPrintSupport && stdenv.hostPlatform.isDarwin) [ cups ];
 
   passthru = {
     inherit sip pyqt6-sip;
@@ -145,7 +145,7 @@ buildPythonPackage rec {
     # ++ lib.optional withConnectivity "PyQt6.QtConnectivity"
     ++ lib.optional withLocation "PyQt6.QtPositioning";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-address-of-temporary";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-address-of-temporary";
 
   meta = with lib; {
     description = "Python bindings for Qt6";
diff --git a/pkgs/development/python-modules/pyqtgraph/default.nix b/pkgs/development/python-modules/pyqtgraph/default.nix
index 6bfa11c30fcb..629f96d76df4 100644
--- a/pkgs/development/python-modules/pyqtgraph/default.nix
+++ b/pkgs/development/python-modules/pyqtgraph/default.nix
@@ -64,7 +64,7 @@ buildPythonPackage rec {
       # https://github.com/pyqtgraph/pyqtgraph/issues/2110
       "test_PolyLineROI"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # https://github.com/pyqtgraph/pyqtgraph/issues/2645
       "test_rescaleData"
     ];
diff --git a/pkgs/development/python-modules/pyqtwebengine/default.nix b/pkgs/development/python-modules/pyqtwebengine/default.nix
index 60801a0c966f..fe3fab812928 100644
--- a/pkgs/development/python-modules/pyqtwebengine/default.nix
+++ b/pkgs/development/python-modules/pyqtwebengine/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage (
         setuptools
       ]
       ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [ libsForQt5.qtdeclarative ]
-      ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ autoSignDarwinBinariesHook ];
+      ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ autoSignDarwinBinariesHook ];
 
     buildInputs =
       [
diff --git a/pkgs/development/python-modules/pyreadstat/default.nix b/pkgs/development/python-modules/pyreadstat/default.nix
index 12262cdff9cb..56894f1c4df4 100644
--- a/pkgs/development/python-modules/pyreadstat/default.nix
+++ b/pkgs/development/python-modules/pyreadstat/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     setuptools
   ];
 
-  buildInputs = [ zlib ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ zlib ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   dependencies = [
     readstat
diff --git a/pkgs/development/python-modules/pyreqwest-impersonate/default.nix b/pkgs/development/python-modules/pyreqwest-impersonate/default.nix
index 1dc215bf0ee8..8d9406666fe7 100644
--- a/pkgs/development/python-modules/pyreqwest-impersonate/default.nix
+++ b/pkgs/development/python-modules/pyreqwest-impersonate/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     SystemConfiguration
   ];
diff --git a/pkgs/development/python-modules/pyscard/default.nix b/pkgs/development/python-modules/pyscard/default.nix
index 3fd9d3c2fbd4..4582cc185203 100644
--- a/pkgs/development/python-modules/pyscard/default.nix
+++ b/pkgs/development/python-modules/pyscard/default.nix
@@ -13,7 +13,7 @@
 
 let
   # Package does not support configuring the pcsc library.
-  withApplePCSC = stdenv.isDarwin;
+  withApplePCSC = stdenv.hostPlatform.isDarwin;
 in
 
 buildPythonPackage rec {
diff --git a/pkgs/development/python-modules/pysequoia/default.nix b/pkgs/development/python-modules/pysequoia/default.nix
index 3fb8236f9b71..f2c07cd5e418 100644
--- a/pkgs/development/python-modules/pysequoia/default.nix
+++ b/pkgs/development/python-modules/pysequoia/default.nix
@@ -47,7 +47,7 @@ buildPythonPackage rec {
       openssl
       pcsclite
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.Security
       libiconv
@@ -62,6 +62,6 @@ buildPythonPackage rec {
     license = licenses.asl20;
     maintainers = with maintainers; [ doronbehar ];
     # Broken since the 0.1.20 update according to ofborg. The errors are not clear...
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/pyshark/default.nix b/pkgs/development/python-modules/pyshark/default.nix
index ba92fdaebd28..7e4cff21d181 100644
--- a/pkgs/development/python-modules/pyshark/default.nix
+++ b/pkgs/development/python-modules/pyshark/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
       # KeyError: 'Packet of index 0 does not exist in capture'
       "test_getting_packet_summary"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # fails on darwin
       # _pickle.PicklingError: logger cannot be pickled
       "test_iterate_empty_psml_capture"
diff --git a/pkgs/development/python-modules/pyside2/default.nix b/pkgs/development/python-modules/pyside2/default.nix
index d228e3fde29f..2a3ff3c5ad34 100644
--- a/pkgs/development/python-modules/pyside2/default.nix
+++ b/pkgs/development/python-modules/pyside2/default.nix
@@ -97,6 +97,6 @@ stdenv.mkDerivation rec {
     homepage = "https://wiki.qt.io/Qt_for_Python";
     maintainers = with maintainers; [ gebner ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/pyside6/default.nix b/pkgs/development/python-modules/pyside6/default.nix
index 2dc0078c369a..7addb26e7167 100644
--- a/pkgs/development/python-modules/pyside6/default.nix
+++ b/pkgs/development/python-modules/pyside6/default.nix
@@ -71,24 +71,24 @@ stdenv.mkDerivation (finalAttrs: {
           'string(FIND "''${_module_dir}" "''${_core_abs_dir}" found_basepath)' \
           'set (found_basepath 0)'
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace cmake/PySideHelpers.cmake \
         --replace-fail \
           "Designer" ""
     '';
 
   # "Couldn't find libclang.dylib You will likely need to add it manually to PATH to ensure the build succeeds."
-  env = lib.optionalAttrs stdenv.isDarwin { LLVM_INSTALL_DIR = "${llvmPackages.libclang.lib}/lib"; };
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { LLVM_INSTALL_DIR = "${llvmPackages.libclang.lib}/lib"; };
 
   nativeBuildInputs = [
     cmake
     ninja
     python
     pythonImportsCheckHook
-  ] ++ lib.optionals stdenv.isDarwin [ moveBuildTree ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ moveBuildTree ];
 
   buildInputs =
-    if stdenv.isLinux then
+    if stdenv.hostPlatform.isLinux then
       # qtwebengine fails under darwin
       # see https://github.com/NixOS/nixpkgs/pull/312987
       packages ++ [ python.pkgs.qt6.qtwebengine ]
diff --git a/pkgs/development/python-modules/pysilero-vad/default.nix b/pkgs/development/python-modules/pysilero-vad/default.nix
index bee85a4b2bc3..020677f05e6a 100644
--- a/pkgs/development/python-modules/pysilero-vad/default.nix
+++ b/pkgs/development/python-modules/pysilero-vad/default.nix
@@ -42,7 +42,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     # what():  /build/source/include/onnxruntime/core/common/logging/logging.h:294 static const onnxruntime::logging::Logger& onnxruntime::logging::LoggingManager::DefaultLogger() Attempt to use DefaultLogger but none has been registered.
-    broken = stdenv.isAarch64 && stdenv.isLinux;
+    broken = stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux;
     description = "Pre-packaged voice activity detector using silero-vad";
     homepage = "https://github.com/rhasspy/pysilero-vad";
     changelog = "https://github.com/rhasspy/pysilero-vad/blob/${src.rev}/CHANGELOG.md";
diff --git a/pkgs/development/python-modules/pysptk/default.nix b/pkgs/development/python-modules/pysptk/default.nix
index f6f0de014d36..e148d8af8b06 100644
--- a/pkgs/development/python-modules/pysptk/default.nix
+++ b/pkgs/development/python-modules/pysptk/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "pysptk" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Wrapper for Speech Signal Processing Toolkit (SPTK)";
     homepage = "https://pysptk.readthedocs.io/";
     license = licenses.mit;
diff --git a/pkgs/development/python-modules/pystatgrab/default.nix b/pkgs/development/python-modules/pystatgrab/default.nix
index 04d460bdf558..942fe48d95b5 100644
--- a/pkgs/development/python-modules/pystatgrab/default.nix
+++ b/pkgs/development/python-modules/pystatgrab/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
 
   buildInputs = [
     libstatgrab
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ IOKit ]);
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ IOKit ]);
 
   nativeCheckInputs = [ unittestCheckHook ];
 
diff --git a/pkgs/development/python-modules/pysvn/default.nix b/pkgs/development/python-modules/pysvn/default.nix
index 3df9edb39f9c..319398fdec91 100644
--- a/pkgs/development/python-modules/pysvn/default.nix
+++ b/pkgs/development/python-modules/pysvn/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
     expat
     neon
     openssl
-  ] ++ lib.optionals stdenv.isLinux [ e2fsprogs ] ++ lib.optionals stdenv.isDarwin [ gcc ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ e2fsprogs ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ gcc ];
 
   preConfigure = ''
     cd Source
@@ -84,6 +84,6 @@ buildPythonPackage rec {
     license = licenses.asl20;
     maintainers = with maintainers; [ dotlambda ];
     # g++: command not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/pytest-ansible/default.nix b/pkgs/development/python-modules/pytest-ansible/default.nix
index 8d3b1bfdeb76..bc8106a999a6 100644
--- a/pkgs/development/python-modules/pytest-ansible/default.nix
+++ b/pkgs/development/python-modules/pytest-ansible/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
       "test_connection_failure_v2"
       "test_connection_failure_extra_inventory_v2"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # These tests fail in the Darwin sandbox
       "test_ansible_facts"
       "test_func"
@@ -74,7 +74,7 @@ buildPythonPackage rec {
       # Test want s to execute pytest in a subprocess
       "tests/integration/test_molecule.py"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # These tests fail in the Darwin sandbox
       "tests/test_adhoc.py"
       "tests/test_adhoc_result.py"
diff --git a/pkgs/development/python-modules/pytest-flask/default.nix b/pkgs/development/python-modules/pytest-flask/default.nix
index 477be61ebefd..f4132d9512f9 100644
--- a/pkgs/development/python-modules/pytest-flask/default.nix
+++ b/pkgs/development/python-modules/pytest-flask/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "pytest_flask" ];
 
-  pytestFlagsArray = lib.optionals stdenv.isDarwin [ "--ignore=tests/test_live_server.py" ];
+  pytestFlagsArray = lib.optionals stdenv.hostPlatform.isDarwin [ "--ignore=tests/test_live_server.py" ];
 
   meta = with lib; {
     description = "Set of pytest fixtures to test Flask applications";
diff --git a/pkgs/development/python-modules/pytest-forked/default.nix b/pkgs/development/python-modules/pytest-forked/default.nix
index 64c43164a01b..6a508417e2e1 100644
--- a/pkgs/development/python-modules/pytest-forked/default.nix
+++ b/pkgs/development/python-modules/pytest-forked/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
   ];
 
   disabledTests =
-    if (pythonAtLeast "3.12" && stdenv.isDarwin && stdenv.isx86_64) then
+    if (pythonAtLeast "3.12" && stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) then
       [
         # non reproducible test failure on hydra, works on community builder
         # https://hydra.nixos.org/build/252537267
diff --git a/pkgs/development/python-modules/pytest-recording/default.nix b/pkgs/development/python-modules/pytest-recording/default.nix
index 23471054526c..dd9e84b3517e 100644
--- a/pkgs/development/python-modules/pytest-recording/default.nix
+++ b/pkgs/development/python-modules/pytest-recording/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
 
   disabledTests =
     [ "test_block_network_with_allowed_hosts" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Missing socket.AF_NETLINK
       "test_other_socket"
     ];
diff --git a/pkgs/development/python-modules/python-can/default.nix b/pkgs/development/python-modules/python-can/default.nix
index 26bd3a27474e..8224de600ae8 100644
--- a/pkgs/development/python-modules/python-can/default.nix
+++ b/pkgs/development/python-modules/python-can/default.nix
@@ -74,7 +74,7 @@ buildPythonPackage rec {
       "test_pack_unpack"
       "test_receive"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # timing sensitive
       "test_general"
       "test_gap"
diff --git a/pkgs/development/python-modules/python-engineio/default.nix b/pkgs/development/python-modules/python-engineio/default.nix
index a7eb7fe8dd17..6a534a249f1f 100644
--- a/pkgs/development/python-modules/python-engineio/default.nix
+++ b/pkgs/development/python-modules/python-engineio/default.nix
@@ -53,9 +53,9 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
-  preCheck = lib.optionalString stdenv.isLinux ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isLinux ''
     echo "nameserver 127.0.0.1" > resolv.conf
     export NIX_REDIRECTS=/etc/protocols=${iana-etc}/etc/protocols:/etc/resolv.conf=$(realpath resolv.conf) \
       LD_PRELOAD=${libredirect}/lib/libredirect.so
diff --git a/pkgs/development/python-modules/python-etcd/default.nix b/pkgs/development/python-modules/python-etcd/default.nix
index 27d768c4e96e..031efa7b31e3 100644
--- a/pkgs/development/python-modules/python-etcd/default.nix
+++ b/pkgs/development/python-modules/python-etcd/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage {
   ];
 
   # arm64 is an unsupported platform on etcd 3.4. should be able to be removed on >= etcd 3.5
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   preCheck = ''
     for file in "test_auth" "integration/test_simple"; do
diff --git a/pkgs/development/python-modules/python-flirt/default.nix b/pkgs/development/python-modules/python-flirt/default.nix
index 8034a621f8b2..47fdc3cfa08d 100644
--- a/pkgs/development/python-modules/python-flirt/default.nix
+++ b/pkgs/development/python-modules/python-flirt/default.nix
@@ -29,7 +29,7 @@ buildPythonPackage rec {
     maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   buildAndTestSubdir = "pyflirt";
 
diff --git a/pkgs/development/python-modules/python-fx/default.nix b/pkgs/development/python-modules/python-fx/default.nix
index 0d906cd2e379..40b09992d749 100644
--- a/pkgs/development/python-modules/python-fx/default.nix
+++ b/pkgs/development/python-modules/python-fx/default.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
   ];
 
   # FAILED tests/test_event_loops.py::TwistedEventLoopTest::test_run - AssertionError: 'callback called with future outcome: True' not found in ['...
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "pyfx" ];
 
diff --git a/pkgs/development/python-modules/python-gvm/default.nix b/pkgs/development/python-modules/python-gvm/default.nix
index 763999be86ad..6d346d6c638b 100644
--- a/pkgs/development/python-modules/python-gvm/default.nix
+++ b/pkgs/development/python-modules/python-gvm/default.nix
@@ -47,7 +47,7 @@ buildPythonPackage rec {
     # No running SSH available
     "test_connect_error"
     "test_feed_xml_error"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_feed_xml_error" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_feed_xml_error" ];
 
   pythonImportsCheck = [ "gvm" ];
 
diff --git a/pkgs/development/python-modules/python-jenkins/default.nix b/pkgs/development/python-modules/python-jenkins/default.nix
index 8afb965dbaca..e06a0760fbdd 100644
--- a/pkgs/development/python-modules/python-jenkins/default.nix
+++ b/pkgs/development/python-modules/python-jenkins/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   # test uses timeout mechanism unsafe for use with the "spawn"
   # multiprocessing backend used on macos
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace tests/test_jenkins_sockets.py \
       --replace test_jenkins_open_no_timeout dont_test_jenkins_open_no_timeout
   '';
diff --git a/pkgs/development/python-modules/python-ldap/default.nix b/pkgs/development/python-modules/python-ldap/default.nix
index 4f1c9bd9636e..ebb042b848ec 100644
--- a/pkgs/development/python-modules/python-ldap/default.nix
+++ b/pkgs/development/python-modules/python-ldap/default.nix
@@ -65,7 +65,7 @@ buildPythonPackage rec {
     "test_tls_ext_noca"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     changelog = "https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-${version}";
diff --git a/pkgs/development/python-modules/python-mapnik/default.nix b/pkgs/development/python-modules/python-mapnik/default.nix
index eed723f10d8e..c06251663e0b 100644
--- a/pkgs/development/python-modules/python-mapnik/default.nix
+++ b/pkgs/development/python-modules/python-mapnik/default.nix
@@ -53,7 +53,7 @@ buildPythonPackage rec {
     ./python-mapnik_std_optional.patch
   ];
 
-  stdenv = if python.stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else python.stdenv;
+  stdenv = if python.stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else python.stdenv;
 
   build-system = [ setuptools ];
 
@@ -103,7 +103,7 @@ buildPythonPackage rec {
       # import from $out
       rm -r mapnik
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Replace the hardcoded /tmp references with $TMPDIR
       sed -i "s,/tmp,$TMPDIR,g" test/python_tests/*.py
     '';
@@ -114,7 +114,7 @@ buildPythonPackage rec {
     "test_passing_pycairo_context_pdf"
     "test_pdf_printing"
     "test_render_with_scale_factor"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "test_passing_pycairo_context_png"
     "test_passing_pycairo_context_svg"
     "test_pycairo_pdf_surface1"
diff --git a/pkgs/development/python-modules/python-redis-lock/default.nix b/pkgs/development/python-modules/python-redis-lock/default.nix
index e50bbeff87ce..a891f0a0e48c 100644
--- a/pkgs/development/python-modules/python-redis-lock/default.nix
+++ b/pkgs/development/python-modules/python-redis-lock/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
   # For Django tests
   preCheck = "export DJANGO_SETTINGS_MODULE=test_project.settings";
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # fail on Darwin because it defaults to multiprocessing `spawn`
     "test_reset_signalizes"
     "test_reset_all_signalizes"
diff --git a/pkgs/development/python-modules/python-roborock/default.nix b/pkgs/development/python-modules/python-roborock/default.nix
index add99dfb341d..289a4e41005e 100644
--- a/pkgs/development/python-modules/python-roborock/default.nix
+++ b/pkgs/development/python-modules/python-roborock/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
     dacite
     paho-mqtt
     pycryptodome
-  ] ++ lib.optionals stdenv.isDarwin [ pycryptodomex ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ pycryptodomex ];
 
   nativeCheckInputs = [
     pytest-asyncio
diff --git a/pkgs/development/python-modules/python-rtmidi/default.nix b/pkgs/development/python-modules/python-rtmidi/default.nix
index f29a3097c631..818eeb919b29 100644
--- a/pkgs/development/python-modules/python-rtmidi/default.nix
+++ b/pkgs/development/python-modules/python-rtmidi/default.nix
@@ -43,11 +43,11 @@ buildPythonPackage rec {
 
   buildInputs =
     [ ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       libjack2
       alsa-lib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreAudio
       CoreMIDI
       CoreServices
diff --git a/pkgs/development/python-modules/python-xmp-toolkit/default.nix b/pkgs/development/python-modules/python-xmp-toolkit/default.nix
index edcb3e0047e7..f5594e983ace 100644
--- a/pkgs/development/python-modules/python-xmp-toolkit/default.nix
+++ b/pkgs/development/python-modules/python-xmp-toolkit/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage {
   '';
 
   # hangs on darwin + sandbox
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     rm test/{test_exempi,test_files}.py
diff --git a/pkgs/development/python-modules/pythonocc-core/default.nix b/pkgs/development/python-modules/pythonocc-core/default.nix
index f01fb4ca467e..755834eecd32 100644
--- a/pkgs/development/python-modules/pythonocc-core/default.nix
+++ b/pkgs/development/python-modules/pythonocc-core/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     libXi
     fontconfig
     rapidjson
-  ] ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   cmakeFlags = [
     "-Wno-dev"
diff --git a/pkgs/development/python-modules/pytorch-metric-learning/default.nix b/pkgs/development/python-modules/pytorch-metric-learning/default.nix
index 832f2e6666d3..19678c01938e 100644
--- a/pkgs/development/python-modules/pytorch-metric-learning/default.nix
+++ b/pkgs/development/python-modules/pytorch-metric-learning/default.nix
@@ -83,7 +83,7 @@ buildPythonPackage rec {
     "test_get_nearest_neighbors"
     "test_list_of_text"
     "test_untrained_indexer"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # AttributeError: module 'torch.distributed' has no attribute 'init_process_group'
     "test_single_proc"
   ] ++ lib.optionals cudaSupport [
diff --git a/pkgs/development/python-modules/pyudev/default.nix b/pkgs/development/python-modules/pyudev/default.nix
index 13073a59f481..f7b75f0ff22e 100644
--- a/pkgs/development/python-modules/pyudev/default.nix
+++ b/pkgs/development/python-modules/pyudev/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     hash = "sha256-LpRUJ6IWdIk7uXYyQB22ITnZHOoe6WE3zHsHrSIZj8c=";
   };
 
-  postPatch = lib.optionalString stdenvNoCC.isLinux ''
+  postPatch = lib.optionalString stdenvNoCC.hostPlatform.isLinux ''
     substituteInPlace src/pyudev/_ctypeslib/utils.py \
       --replace "find_library(name)" "'${lib.getLib udev}/lib/libudev.so'"
   '';
diff --git a/pkgs/development/python-modules/pyunbound/default.nix b/pkgs/development/python-modules/pyunbound/default.nix
index a5d33cbfa440..13357faec593 100644
--- a/pkgs/development/python-modules/pyunbound/default.nix
+++ b/pkgs/development/python-modules/pyunbound/default.nix
@@ -56,7 +56,7 @@ buildPythonPackage rec {
     rm -r $out/bin $out/share $out/include $out/etc/unbound
   ''
   # patchelf is only available on Linux and no patching is needed on darwin
-  + lib.optionalString stdenv.isLinux ''
+  + lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --replace-needed libunbound.so.8 $out/${python.sitePackages}/libunbound.so.8 $out/${python.sitePackages}/_unbound.so
   '';
 
diff --git a/pkgs/development/python-modules/pyvex/default.nix b/pkgs/development/python-modules/pyvex/default.nix
index 4fe56684d50e..f57cf0d0bcc3 100644
--- a/pkgs/development/python-modules/pyvex/default.nix
+++ b/pkgs/development/python-modules/pyvex/default.nix
@@ -30,12 +30,12 @@ buildPythonPackage rec {
     pycparser
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace vex/Makefile-gcc \
       --replace-fail '/usr/bin/ar' 'ar'
   '';
 
-  setupPyBuildFlags = lib.optionals stdenv.isLinux [
+  setupPyBuildFlags = lib.optionals stdenv.hostPlatform.isLinux [
     "--plat-name"
     "linux"
   ];
diff --git a/pkgs/development/python-modules/pyvlx/default.nix b/pkgs/development/python-modules/pyvlx/default.nix
index 0bfb49ebc383..65c469091eea 100644
--- a/pkgs/development/python-modules/pyvlx/default.nix
+++ b/pkgs/development/python-modules/pyvlx/default.nix
@@ -47,6 +47,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/Julius2342/pyvlx/releases/tag/${version}";
     license = with licenses; [ lgpl2Only ];
     maintainers = with maintainers; [ fab ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/qcelemental/default.nix b/pkgs/development/python-modules/qcelemental/default.nix
index e5a2688d0011..71cfa490452b 100644
--- a/pkgs/development/python-modules/qcelemental/default.nix
+++ b/pkgs/development/python-modules/qcelemental/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "qcelemental" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Periodic table, physical constants and molecule parsing for quantum chemistry";
     homepage = "https://github.com/MolSSI/QCElemental";
     changelog = "https://github.com/MolSSI/QCElemental/blob/v${version}/docs/changelog.rst";
diff --git a/pkgs/development/python-modules/qcodes-contrib-drivers/default.nix b/pkgs/development/python-modules/qcodes-contrib-drivers/default.nix
index 4c2db9b41f5c..d6bd8c809582 100644
--- a/pkgs/development/python-modules/qcodes-contrib-drivers/default.nix
+++ b/pkgs/development/python-modules/qcodes-contrib-drivers/default.nix
@@ -50,11 +50,11 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "qcodes_contrib_drivers" ];
 
   disabledTests =
-    lib.optionals (stdenv.isDarwin) [
+    lib.optionals (stdenv.hostPlatform.isDarwin) [
       # At index 13 diff: 'sour6:volt 0.29000000000000004' != 'sour6:volt 0.29'
       "test_stability_diagram_external"
     ]
-    ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
       # AssertionError: assert ['outp:trig4:...9999996', ...] == ['outp:trig4:...t 0.266', ...]
       "test_stability_diagram_external"
     ];
diff --git a/pkgs/development/python-modules/qcs-sdk-python/default.nix b/pkgs/development/python-modules/qcs-sdk-python/default.nix
index 4d0d1ffe38c7..854ed41a3437 100644
--- a/pkgs/development/python-modules/qcs-sdk-python/default.nix
+++ b/pkgs/development/python-modules/qcs-sdk-python/default.nix
@@ -53,7 +53,7 @@ buildPythonPackage rec {
     tracing-opentelemetry = [ opentelemetry-api ];
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
     libiconv
diff --git a/pkgs/development/python-modules/qiskit-ignis/default.nix b/pkgs/development/python-modules/qiskit-ignis/default.nix
index a5744586b1a5..a51ad99805b9 100644
--- a/pkgs/development/python-modules/qiskit-ignis/default.nix
+++ b/pkgs/development/python-modules/qiskit-ignis/default.nix
@@ -64,7 +64,7 @@ buildPythonPackage rec {
     [
       "test_tensored_meas_cal_on_circuit" # Flaky test, occasionally returns result outside bounds
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       "test_fitters" # Fails check that arrays are close. Might be due to aarch64 math issues.
     ];
 
diff --git a/pkgs/development/python-modules/qiskit-terra/default.nix b/pkgs/development/python-modules/qiskit-terra/default.nix
index 44ae18a933d0..eb433a22e8ef 100644
--- a/pkgs/development/python-modules/qiskit-terra/default.nix
+++ b/pkgs/development/python-modules/qiskit-terra/default.nix
@@ -80,7 +80,7 @@ buildPythonPackage rec {
     rustPlatform.cargoSetupHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   cargoDeps = rustPlatform.fetchCargoTarball {
     inherit src;
diff --git a/pkgs/development/python-modules/qscintilla-qt5/default.nix b/pkgs/development/python-modules/qscintilla-qt5/default.nix
index bab2320b0d6f..2ef0d3280f83 100644
--- a/pkgs/development/python-modules/qscintilla-qt5/default.nix
+++ b/pkgs/development/python-modules/qscintilla-qt5/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
     pythonPackages.setuptools
   ];
   buildInputs = [ qtbase ];
-  propagatedBuildInputs = [ pyqt5 ] ++ lib.optionals stdenv.isDarwin [ qtmacextras ];
+  propagatedBuildInputs = [ pyqt5 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ qtmacextras ];
 
   dontWrapQtApps = true;
 
@@ -47,7 +47,7 @@ buildPythonPackage rec {
       echo 'sip-include-dirs = [ "${pyqt5}/${python.sitePackages}/PyQt5/bindings"]' \
          >> pyproject.toml
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace project.py \
         --replace \
         "if self.project.qsci_external_lib:
diff --git a/pkgs/development/python-modules/questionary/default.nix b/pkgs/development/python-modules/questionary/default.nix
index ea6844159930..9663e8e1fdd1 100644
--- a/pkgs/development/python-modules/questionary/default.nix
+++ b/pkgs/development/python-modules/questionary/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ulimit -n 1024
   '';
 
diff --git a/pkgs/development/python-modules/quil/default.nix b/pkgs/development/python-modules/quil/default.nix
index 79f6a4c6ed06..98175f1cbbda 100644
--- a/pkgs/development/python-modules/quil/default.nix
+++ b/pkgs/development/python-modules/quil/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
     rustPlatform.maturinBuildHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   dependencies = [ numpy ];
 
diff --git a/pkgs/development/python-modules/rapidfuzz/default.nix b/pkgs/development/python-modules/rapidfuzz/default.nix
index 02ef0d753fae..64246e6835ee 100644
--- a/pkgs/development/python-modules/rapidfuzz/default.nix
+++ b/pkgs/development/python-modules/rapidfuzz/default.nix
@@ -56,7 +56,7 @@ buildPythonPackage rec {
     ''
       export RAPIDFUZZ_BUILD_EXTENSION=1
     ''
-    + lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) ''
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) ''
       export CMAKE_ARGS="-DCMAKE_CXX_COMPILER_AR=$AR -DCMAKE_CXX_COMPILER_RANLIB=$RANLIB"
     '';
 
@@ -74,7 +74,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  disabledTests = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  disabledTests = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # segfaults
     "test_cdist"
   ];
diff --git a/pkgs/development/python-modules/rapidocr-onnxruntime/default.nix b/pkgs/development/python-modules/rapidocr-onnxruntime/default.nix
index eef3e3b975ce..5739ca88b3b0 100644
--- a/pkgs/development/python-modules/rapidocr-onnxruntime/default.nix
+++ b/pkgs/development/python-modules/rapidocr-onnxruntime/default.nix
@@ -115,7 +115,7 @@ buildPythonPackage {
   meta = {
     # This seems to be related to https://github.com/microsoft/onnxruntime/issues/10038
     # Also some related issue: https://github.com/NixOS/nixpkgs/pull/319053#issuecomment-2167713362
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     changelog = "https://github.com/RapidAI/RapidOCR/releases/tag/v${version}";
     description = "Cross platform OCR Library based on OnnxRuntime";
     homepage = "https://github.com/RapidAI/RapidOCR";
diff --git a/pkgs/development/python-modules/rasterio/default.nix b/pkgs/development/python-modules/rasterio/default.nix
index 8536f1bc981c..3365f12c1bc3 100644
--- a/pkgs/development/python-modules/rasterio/default.nix
+++ b/pkgs/development/python-modules/rasterio/default.nix
@@ -99,7 +99,7 @@ buildPythonPackage rec {
   disabledTests = [
     # flaky
     "test_outer_boundless_pixel_fidelity"
-  ] ++ lib.optionals stdenv.isDarwin [ "test_reproject_error_propagation" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "test_reproject_error_propagation" ];
 
   pythonImportsCheck = [ "rasterio" ];
 
diff --git a/pkgs/development/python-modules/raylib-python-cffi/default.nix b/pkgs/development/python-modules/raylib-python-cffi/default.nix
index 6069a6bdfe55..eaaa13c96cb3 100644
--- a/pkgs/development/python-modules/raylib-python-cffi/default.nix
+++ b/pkgs/development/python-modules/raylib-python-cffi/default.nix
@@ -66,7 +66,7 @@ buildPythonPackage rec {
       physac
       raygui
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       OpenGL
       Cocoa
       IOKit
diff --git a/pkgs/development/python-modules/rdflib/default.nix b/pkgs/development/python-modules/rdflib/default.nix
index b0f2b4c7cd2a..17bf74863a74 100644
--- a/pkgs/development/python-modules/rdflib/default.nix
+++ b/pkgs/development/python-modules/rdflib/default.nix
@@ -82,7 +82,7 @@ buildPythonPackage rec {
       "test_guess_format_for_parse"
       "rdflib.extras.infixowl"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Require loopback network access
       "TestGraphHTTP"
     ];
diff --git a/pkgs/development/python-modules/readability-lxml/default.nix b/pkgs/development/python-modules/readability-lxml/default.nix
index e676918cb698..7c75c32be269 100644
--- a/pkgs/development/python-modules/readability-lxml/default.nix
+++ b/pkgs/development/python-modules/readability-lxml/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
     timeout-decorator
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # Test is broken on darwin. Fix in master from https://github.com/buriy/python-readability/pull/178
     "test_many_repeated_spaces"
   ];
diff --git a/pkgs/development/python-modules/requests-kerberos/default.nix b/pkgs/development/python-modules/requests-kerberos/default.nix
index ffa706fcd58b..70a5eebacdb5 100644
--- a/pkgs/development/python-modules/requests-kerberos/default.nix
+++ b/pkgs/development/python-modules/requests-kerberos/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
       pyspnego
     ]
     # Avoid broken Python krb5 package on Darwin
-    ++ lib.optionals (!stdenv.isDarwin) pyspnego.optional-dependencies.kerberos;
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) pyspnego.optional-dependencies.kerberos;
 
   nativeCheckInputs = [
     pytestCheckHook
diff --git a/pkgs/development/python-modules/requests/default.nix b/pkgs/development/python-modules/requests/default.nix
index c8ec3c490ecf..6ffe869c0a6a 100644
--- a/pkgs/development/python-modules/requests/default.nix
+++ b/pkgs/development/python-modules/requests/default.nix
@@ -72,13 +72,13 @@ buildPythonPackage rec {
       "TestRequests"
       "TestTimeout"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # Fatal Python error: Aborted
       "test_basic_response"
       "test_text_response"
     ];
 
-  disabledTestPaths = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  disabledTestPaths = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     # Fatal Python error: Aborted
     "tests/test_lowlevel.py"
   ];
diff --git a/pkgs/development/python-modules/rerun-sdk/default.nix b/pkgs/development/python-modules/rerun-sdk/default.nix
index add95c23c9a1..13b7226782ba 100644
--- a/pkgs/development/python-modules/rerun-sdk/default.nix
+++ b/pkgs/development/python-modules/rerun-sdk/default.nix
@@ -75,7 +75,7 @@ buildPythonPackage {
   ];
 
   inherit (rerun) addDlopenRunpaths addDlopenRunpathsPhase;
-  postPhases = lib.optionals stdenv.isLinux [ "addDlopenRunpathsPhase" ];
+  postPhases = lib.optionals stdenv.hostPlatform.isLinux [ "addDlopenRunpathsPhase" ];
 
   disabledTestPaths = [
     # "fixture 'benchmark' not found"
diff --git a/pkgs/development/python-modules/rising/default.nix b/pkgs/development/python-modules/rising/default.nix
index 0e876aecbb05..49b38e2e3426 100644
--- a/pkgs/development/python-modules/rising/default.nix
+++ b/pkgs/development/python-modules/rising/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  disabledTests = lib.optionals (stdenv.isLinux && stdenv.isAarch64) [
+  disabledTests = lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
     # RuntimeError: DataLoader worker (pid(s) <...>) exited unexpectedly:
     "test_progressive_resize_integration"
   ];
diff --git a/pkgs/development/python-modules/rpy2/default.nix b/pkgs/development/python-modules/rpy2/default.nix
index 1fd58cb565fe..582e35508502 100644
--- a/pkgs/development/python-modules/rpy2/default.nix
+++ b/pkgs/development/python-modules/rpy2/default.nix
@@ -87,7 +87,7 @@ buildPythonPackage rec {
     simplegeneric
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # https://github.com/rpy2/rpy2/issues/1111
   disabledTests = [
diff --git a/pkgs/development/python-modules/rpyc/default.nix b/pkgs/development/python-modules/rpyc/default.nix
index a9873de90632..336ddca0bf73 100644
--- a/pkgs/development/python-modules/rpyc/default.nix
+++ b/pkgs/development/python-modules/rpyc/default.nix
@@ -59,7 +59,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "rpyc" ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Remote Python Call (RPyC), a transparent and symmetric RPC library";
diff --git a/pkgs/development/python-modules/rstcheck/default.nix b/pkgs/development/python-modules/rstcheck/default.nix
index a403db708681..206f9192d92a 100644
--- a/pkgs/development/python-modules/rstcheck/default.nix
+++ b/pkgs/development/python-modules/rstcheck/default.nix
@@ -43,7 +43,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # Disabled until https://github.com/rstcheck/rstcheck-core/issues/19 is resolved.
     "test_error_without_config_file_macos"
     "test_file_1_is_bad_without_config_macos"
diff --git a/pkgs/development/python-modules/rtmidi-python/default.nix b/pkgs/development/python-modules/rtmidi-python/default.nix
index 6d8bf78b6d3c..cdb87a0c8657 100644
--- a/pkgs/development/python-modules/rtmidi-python/default.nix
+++ b/pkgs/development/python-modules/rtmidi-python/default.nix
@@ -26,8 +26,8 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ cython_0 ];
   buildInputs =
-    lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreAudio
       CoreMIDI
       CoreServices
diff --git a/pkgs/development/python-modules/ruff-api/default.nix b/pkgs/development/python-modules/ruff-api/default.nix
index 13bcdefa3496..a363c4c7d32a 100644
--- a/pkgs/development/python-modules/ruff-api/default.nix
+++ b/pkgs/development/python-modules/ruff-api/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.CoreServices
     libiconv
diff --git a/pkgs/development/python-modules/ruffus/default.nix b/pkgs/development/python-modules/ruffus/default.nix
index 44a1b8939795..f7c96b10d3e1 100644
--- a/pkgs/development/python-modules/ruffus/default.nix
+++ b/pkgs/development/python-modules/ruffus/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   ];
 
   # tests very flaky & hang often on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   # test files do indeed need to be executed separately
   checkPhase = ''
     pushd ruffus/test
diff --git a/pkgs/development/python-modules/rustworkx/default.nix b/pkgs/development/python-modules/rustworkx/default.nix
index b0be3a51573c..3f17b45e2d20 100644
--- a/pkgs/development/python-modules/rustworkx/default.nix
+++ b/pkgs/development/python-modules/rustworkx/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = [ numpy ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ numpy ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   checkInputs = [
     fixtures
diff --git a/pkgs/development/python-modules/s3transfer/default.nix b/pkgs/development/python-modules/s3transfer/default.nix
index e138d2193a5c..d245c6b0b964 100644
--- a/pkgs/development/python-modules/s3transfer/default.nix
+++ b/pkgs/development/python-modules/s3transfer/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
     # There was a change in python 3.8 that defaults multiprocessing to spawn instead of fork on macOS
     # See https://bugs.python.org/issue33725 and https://github.com/python/cpython/pull/13603.
     # I suspect the underlying issue here is that upstream tests aren't compatible with spawn multiprocessing, and pass on linux where the default is still fork
-    lib.optionals stdenv.isDarwin [ "tests/unit/test_compat.py" ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ "tests/unit/test_compat.py" ];
 
   pythonImportsCheck = [ "s3transfer" ];
 
diff --git a/pkgs/development/python-modules/safetensors/default.nix b/pkgs/development/python-modules/safetensors/default.nix
index 7228a840d668..584cc1e7d6af 100644
--- a/pkgs/development/python-modules/safetensors/default.nix
+++ b/pkgs/development/python-modules/safetensors/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
     setuptools-rust
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   nativeCheckInputs = [
     h5py
@@ -64,7 +64,7 @@ buildPythonPackage rec {
       "tests/test_paddle_comparison.py"
       "tests/test_tf_comparison.py"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # don't require mlx (not in Nixpkgs) to run tests
       "tests/test_mlx_comparison.py"
     ];
diff --git a/pkgs/development/python-modules/sanic/default.nix b/pkgs/development/python-modules/sanic/default.nix
index 04f00668ed92..6979926cd7c9 100644
--- a/pkgs/development/python-modules/sanic/default.nix
+++ b/pkgs/development/python-modules/sanic/default.nix
@@ -5,7 +5,7 @@
   aioquic,
   beautifulsoup4,
   buildPythonPackage,
-  doCheck ? !stdenv.isDarwin, # on Darwin, tests fail but pkg still works
+  doCheck ? !stdenv.hostPlatform.isDarwin, # on Darwin, tests fail but pkg still works
   fetchFromGitHub,
   gunicorn,
   html5tagger,
@@ -82,7 +82,7 @@ buildPythonPackage rec {
       # needed for relative paths for some packages
       cd tests
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # OSError: [Errno 24] Too many open files
       ulimit -n 1024
     '';
diff --git a/pkgs/development/python-modules/scikit-image/default.nix b/pkgs/development/python-modules/scikit-image/default.nix
index 369f1bf78e5c..3c0743354787 100644
--- a/pkgs/development/python-modules/scikit-image/default.nix
+++ b/pkgs/development/python-modules/scikit-image/default.nix
@@ -125,7 +125,7 @@ let
           "skimage/io/tests/test_io.py::test_imread_http_url"
           "skimage/restoration/tests/test_rolling_ball.py::test_ndim"
         ]
-        ++ lib.optionals stdenv.isDarwin [
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [
           # Matplotlib tests are broken inside darwin sandbox
           "skimage/feature/tests/test_util.py::test_plot_matches"
           "skimage/filters/tests/test_thresholding.py::TestSimpleImage::test_try_all_threshold"
@@ -133,7 +133,7 @@ let
           # See https://github.com/scikit-image/scikit-image/issues/7061 and https://github.com/scikit-image/scikit-image/issues/7104
           "skimage/measure/tests/test_fit.py"
         ]
-        ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+        ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
           # https://github.com/scikit-image/scikit-image/issues/7104
           "skimage/measure/tests/test_moments.py"
         ]
diff --git a/pkgs/development/python-modules/scikit-learn/default.nix b/pkgs/development/python-modules/scikit-learn/default.nix
index 7e975cb15949..eeba3f116d9d 100644
--- a/pkgs/development/python-modules/scikit-learn/default.nix
+++ b/pkgs/development/python-modules/scikit-learn/default.nix
@@ -80,12 +80,12 @@ buildPythonPackage rec {
   '';
 
   # PermissionError: [Errno 1] Operation not permitted: '/nix/nix-installer'
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTests = [
     # Skip test_feature_importance_regression - does web fetch
     "test_feature_importance_regression"
-  ] ++ lib.optionals stdenv.isAarch64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isAarch64 [
     # doesn't seem to produce correct results?
     # possibly relevant: https://github.com/scikit-learn/scikit-learn/issues/25838#issuecomment-2308650816
     "test_sparse_input"
diff --git a/pkgs/development/python-modules/scikit-rf/default.nix b/pkgs/development/python-modules/scikit-rf/default.nix
index e4d56716ee2e..3cbaf5f39e45 100644
--- a/pkgs/development/python-modules/scikit-rf/default.nix
+++ b/pkgs/development/python-modules/scikit-rf/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage rec {
     ];
   };
 
-  env = lib.optionalAttrs stdenv.isDarwin { MPLBACKEND = "Agg"; };
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { MPLBACKEND = "Agg"; };
 
   nativeCheckInputs = [
     pytest-mock
@@ -83,7 +83,7 @@ buildPythonPackage rec {
   # test_calibration.py generates a divide by zero error on darwin
   # https://github.com/scikit-rf/scikit-rf/issues/972
   disabledTestPaths = lib.optional (
-    stdenv.isAarch64 && stdenv.isDarwin
+    stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin
   ) "skrf/calibration/tests/test_calibration.py";
 
   pythonImportsCheck = [ "skrf" ];
diff --git a/pkgs/development/python-modules/scikit-survival/default.nix b/pkgs/development/python-modules/scikit-survival/default.nix
index e2d4ebff287b..78e58877d516 100644
--- a/pkgs/development/python-modules/scikit-survival/default.nix
+++ b/pkgs/development/python-modules/scikit-survival/default.nix
@@ -71,7 +71,7 @@ buildPythonPackage rec {
       "test_survival_svm"
       "test_tree"
     ]
-    ++ lib.optional (stdenv.isDarwin && stdenv.isAarch64)
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)
       # floating point mismatch on aarch64
       # 27079905.88052468 to far from 27079905.880496684
       "test_coxnet";
diff --git a/pkgs/development/python-modules/scipy/default.nix b/pkgs/development/python-modules/scipy/default.nix
index e9b5a8a7ff5d..d6b812cd30ab 100644
--- a/pkgs/development/python-modules/scipy/default.nix
+++ b/pkgs/development/python-modules/scipy/default.nix
@@ -112,7 +112,7 @@ buildPythonPackage {
       pkg-config
       setuptools
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Minimal version required according to:
       # https://github.com/scipy/scipy/blob/v1.14.0/scipy/meson.build#L185-L188
       (xcbuild.override {
@@ -141,7 +141,7 @@ buildPythonPackage {
 
   # The following tests are broken on aarch64-darwin with newer compilers and library versions.
   # See https://github.com/scipy/scipy/issues/18308
-  disabledTests = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  disabledTests = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     "test_a_b_neg_int_after_euler_hypergeometric_transformation"
     "test_dst4_definition_ortho"
     "test_load_mat4_le"
@@ -150,7 +150,7 @@ buildPythonPackage {
     "test_uint64_max"
   ];
 
-  doCheck = !(stdenv.isx86_64 && stdenv.isDarwin);
+  doCheck = !(stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin);
 
   preConfigure =
     ''
@@ -187,7 +187,7 @@ buildPythonPackage {
   #
   #         ldr     x0, [x0, ___stack_chk_guard];momd
   #
-  hardeningDisable = lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [ "stackprotector" ];
+  hardeningDisable = lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin) [ "stackprotector" ];
 
   # remove references to dev dependencies
   postInstall = ''
diff --git a/pkgs/development/python-modules/scrapy/default.nix b/pkgs/development/python-modules/scrapy/default.nix
index f291798d0500..010481da31e8 100644
--- a/pkgs/development/python-modules/scrapy/default.nix
+++ b/pkgs/development/python-modules/scrapy/default.nix
@@ -117,7 +117,7 @@ buildPythonPackage rec {
       # Test fails on Hydra
       "test_start_requests_laziness"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_xmliter_encoding"
       "test_download"
       "test_reactor_default_twisted_reactor_select"
diff --git a/pkgs/development/python-modules/screeninfo/default.nix b/pkgs/development/python-modules/screeninfo/default.nix
index dc32cbb1dd6b..9f1a6c3a6e24 100644
--- a/pkgs/development/python-modules/screeninfo/default.nix
+++ b/pkgs/development/python-modules/screeninfo/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "screeninfo" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Fetch location and size of physical screens";
     homepage = "https://github.com/rr-/screeninfo";
     license = licenses.mit;
diff --git a/pkgs/development/python-modules/scs/default.nix b/pkgs/development/python-modules/scs/default.nix
index 8736930939e3..e311b2f2f25f 100644
--- a/pkgs/development/python-modules/scs/default.nix
+++ b/pkgs/development/python-modules/scs/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
   ];
 
   buildInputs =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       [ Accelerate ]
     else
       [
diff --git a/pkgs/development/python-modules/selenium/default.nix b/pkgs/development/python-modules/selenium/default.nix
index 9009d6bf3c4f..ab3b46b43816 100644
--- a/pkgs/development/python-modules/selenium/default.nix
+++ b/pkgs/development/python-modules/selenium/default.nix
@@ -47,11 +47,11 @@ buildPythonPackage rec {
       cp ../javascript/cdp-support/mutation-listener.js $DST_REMOTE
       cp ../third_party/js/selenium/webdriver.json $DST_FF/webdriver_prefs.json
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mkdir -p $DST_PREFIX/common/macos
       ln -s ${lib.getExe selenium-manager} $DST_PREFIX/common/macos/
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $DST_PREFIX/common/linux/
       ln -s ${lib.getExe selenium-manager} $DST_PREFIX/common/linux/
     '';
diff --git a/pkgs/development/python-modules/send2trash/default.nix b/pkgs/development/python-modules/send2trash/default.nix
index 06beaabdbcd5..f497e2fef41c 100644
--- a/pkgs/development/python-modules/send2trash/default.nix
+++ b/pkgs/development/python-modules/send2trash/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ setuptools ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     export HOME=$TMPDIR
diff --git a/pkgs/development/python-modules/sentry-sdk/1.nix b/pkgs/development/python-modules/sentry-sdk/1.nix
index 3f57549a1e39..db47e03c017d 100644
--- a/pkgs/development/python-modules/sentry-sdk/1.nix
+++ b/pkgs/development/python-modules/sentry-sdk/1.nix
@@ -102,7 +102,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   disabledTests = [
     # Issue with the asseration
diff --git a/pkgs/development/python-modules/sh/default.nix b/pkgs/development/python-modules/sh/default.nix
index 51a4a9d842f6..655e93f4e964 100644
--- a/pkgs/development/python-modules/sh/default.nix
+++ b/pkgs/development/python-modules/sh/default.nix
@@ -43,7 +43,7 @@ buildPythonPackage rec {
       # https://github.com/amoffat/sh/issues/684
       "test_general_signal"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Disable tests that fail on Darwin sandbox
       "test_background_exception"
       "test_cwd"
diff --git a/pkgs/development/python-modules/shapely/default.nix b/pkgs/development/python-modules/shapely/default.nix
index db6e185cb9b2..0959a8e3e0c9 100644
--- a/pkgs/development/python-modules/shapely/default.nix
+++ b/pkgs/development/python-modules/shapely/default.nix
@@ -46,7 +46,7 @@ buildPythonPackage rec {
     cd $out
   '';
 
-  disabledTests = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+  disabledTests = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
     # FIXME(lf-): these logging tests are broken, which is definitely our
     # fault. I've tried figuring out the cause and failed.
     #
diff --git a/pkgs/development/python-modules/shiboken6/default.nix b/pkgs/development/python-modules/shiboken6/default.nix
index e3d5490a6c36..2c491e193d80 100644
--- a/pkgs/development/python-modules/shiboken6/default.nix
+++ b/pkgs/development/python-modules/shiboken6/default.nix
@@ -28,7 +28,7 @@ stdenv'.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     cmake
     (python.pythonOnBuildForHost.withPackages (ps: [ ps.setuptools ]))
-  ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [
     llvmPackages.llvm
diff --git a/pkgs/development/python-modules/show-in-file-manager/default.nix b/pkgs/development/python-modules/show-in-file-manager/default.nix
index a43b08ee1c9e..a08a874d690c 100644
--- a/pkgs/development/python-modules/show-in-file-manager/default.nix
+++ b/pkgs/development/python-modules/show-in-file-manager/default.nix
@@ -24,7 +24,7 @@ buildPythonPackage rec {
     setuptools
   ];
 
-  propagatedBuildInputs = [ packaging ] ++ lib.optional (stdenv.isLinux) pyxdg;
+  propagatedBuildInputs = [ packaging ] ++ lib.optional (stdenv.hostPlatform.isLinux) pyxdg;
 
   meta = with lib; {
     homepage = "https://github.com/damonlynch/showinfilemanager";
diff --git a/pkgs/development/python-modules/simpful/default.nix b/pkgs/development/python-modules/simpful/default.nix
index 74c88e6a5644..2759c829246e 100644
--- a/pkgs/development/python-modules/simpful/default.nix
+++ b/pkgs/development/python-modules/simpful/default.nix
@@ -54,6 +54,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/aresio/simpful/releases/tag/${version}";
     license = with licenses; [ lgpl3Only ];
     maintainers = with maintainers; [ fab ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/simplejson/default.nix b/pkgs/development/python-modules/simplejson/default.nix
index bbebbfd35867..b8d70a31b7aa 100644
--- a/pkgs/development/python-modules/simplejson/default.nix
+++ b/pkgs/development/python-modules/simplejson/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "simplejson" ];
 
diff --git a/pkgs/development/python-modules/skia-pathops/default.nix b/pkgs/development/python-modules/skia-pathops/default.nix
index 15806e8b1bce..8e27202ad838 100644
--- a/pkgs/development/python-modules/skia-pathops/default.nix
+++ b/pkgs/development/python-modules/skia-pathops/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
         --replace "build_cmd = [sys.executable, build_skia_py, build_dir]" \
           'build_cmd = [sys.executable, build_skia_py, "--no-fetch-gn", "--no-virtualenv", "--gn-path", "${gn}/bin/gn", build_dir]'
     ''
-    + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
       substituteInPlace src/cpp/skia-builder/skia/gn/skia/BUILD.gn \
         --replace "-march=armv7-a" "-march=armv8-a" \
         --replace "-mfpu=neon" "" \
@@ -42,7 +42,7 @@ buildPythonPackage rec {
         --replace "defined(SK_CPU_ARM64)" "0"
     ''
     +
-      lib.optionalString (stdenv.isDarwin && stdenv.isx86_64) # old compiler?
+      lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) # old compiler?
         ''
           patch -p1 <<EOF
           --- a/src/cpp/skia-builder/skia/include/private/base/SkTArray.h
@@ -57,9 +57,9 @@ buildPythonPackage rec {
     cython
     ninja
     setuptools-scm
-  ] ++ lib.optionals stdenv.isDarwin [ xcodebuild ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcodebuild ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     ApplicationServices
     OpenGL
   ];
diff --git a/pkgs/development/python-modules/skops/default.nix b/pkgs/development/python-modules/skops/default.nix
index f0d33093d5ef..70df89009fd3 100644
--- a/pkgs/development/python-modules/skops/default.nix
+++ b/pkgs/development/python-modules/skops/default.nix
@@ -53,7 +53,7 @@ buildPythonPackage rec {
       # minor output formatting issue
       "skops/card/_model_card.py"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Segfaults on darwin
       "skops/io/tests/test_persist.py"
     ];
diff --git a/pkgs/development/python-modules/skorch/default.nix b/pkgs/development/python-modules/skorch/default.nix
index 28a8f1771f4e..3e139d4714a8 100644
--- a/pkgs/development/python-modules/skorch/default.nix
+++ b/pkgs/development/python-modules/skorch/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
       # failing tests
       "test_pickle_load"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # there is a problem with the compiler selection
       "test_fit_and_predict_with_compile"
     ]
diff --git a/pkgs/development/python-modules/skytemple-files/default.nix b/pkgs/development/python-modules/skytemple-files/default.nix
index 8d1087f4ab83..240c0a65d805 100644
--- a/pkgs/development/python-modules/skytemple-files/default.nix
+++ b/pkgs/development/python-modules/skytemple-files/default.nix
@@ -100,6 +100,6 @@ buildPythonPackage rec {
     mainProgram = "skytemple_export_maps";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ marius851000 ];
-    broken = stdenv.isDarwin; # pyobjc is missing
+    broken = stdenv.hostPlatform.isDarwin; # pyobjc is missing
   };
 }
diff --git a/pkgs/development/python-modules/skytemple-rust/default.nix b/pkgs/development/python-modules/skytemple-rust/default.nix
index ed60b724f840..83873d2e0aa3 100644
--- a/pkgs/development/python-modules/skytemple-rust/default.nix
+++ b/pkgs/development/python-modules/skytemple-rust/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
     hash = "sha256-0a57RmZPztcIeRs7GNYe18JO+LlWoeNWG3nD9cG0XIU=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Foundation
   ];
diff --git a/pkgs/development/python-modules/sleekxmpp/default.nix b/pkgs/development/python-modules/sleekxmpp/default.nix
index dea81113d390..826b009e0d28 100644
--- a/pkgs/development/python-modules/sleekxmpp/default.nix
+++ b/pkgs/development/python-modules/sleekxmpp/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   };
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
     description = "XMPP library for Python";
     license = licenses.mit;
     homepage = "http://sleekxmpp.com/";
diff --git a/pkgs/development/python-modules/smbprotocol/default.nix b/pkgs/development/python-modules/smbprotocol/default.nix
index e531acb40b99..68405f52beff 100644
--- a/pkgs/development/python-modules/smbprotocol/default.nix
+++ b/pkgs/development/python-modules/smbprotocol/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # https://github.com/jborean93/smbprotocol/issues/119
     "test_copymode_local_to_local_symlink_dont_follow"
     "test_copystat_local_to_local_symlink_dont_follow_fail"
diff --git a/pkgs/development/python-modules/snitun/default.nix b/pkgs/development/python-modules/snitun/default.nix
index a0192ee1188e..13a86fb63e9d 100644
--- a/pkgs/development/python-modules/snitun/default.nix
+++ b/pkgs/development/python-modules/snitun/default.nix
@@ -47,7 +47,7 @@ buildPythonPackage rec {
       # AssertionError: Expected 'fileno' to not have been called. Called 1 times.
       "test_client_stop_no_wait"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "test_multiplexer_data_channel_abort_full" # https://github.com/NabuCasa/snitun/issues/61
       # port binding conflicts
       "test_snitun_single_runner_timeout"
diff --git a/pkgs/development/python-modules/somajo/default.nix b/pkgs/development/python-modules/somajo/default.nix
index 5d4e946c8518..bcf489a45330 100644
--- a/pkgs/development/python-modules/somajo/default.nix
+++ b/pkgs/development/python-modules/somajo/default.nix
@@ -27,7 +27,7 @@ buildPythonPackage rec {
   dependencies = [ regex ];
 
   # loops forever
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "somajo" ];
 
diff --git a/pkgs/development/python-modules/soundfile/default.nix b/pkgs/development/python-modules/soundfile/default.nix
index 819975014f14..3e421ab2ac86 100644
--- a/pkgs/development/python-modules/soundfile/default.nix
+++ b/pkgs/development/python-modules/soundfile/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   version = "0.12.1";
   format = "setuptools";
   # https://github.com/bastibe/python-soundfile/issues/157
-  disabled = isPyPy || stdenv.isi686;
+  disabled = isPyPy || stdenv.hostPlatform.isi686;
 
   src = fetchPypi {
     inherit pname version;
diff --git a/pkgs/development/python-modules/sourmash/default.nix b/pkgs/development/python-modules/sourmash/default.nix
index aefb730b229d..8ed0a8157fbc 100644
--- a/pkgs/development/python-modules/sourmash/default.nix
+++ b/pkgs/development/python-modules/sourmash/default.nix
@@ -21,7 +21,7 @@
   pytestCheckHook,
 }:
 let
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv { darwinMinVersion = "10.14"; } else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv { darwinMinVersion = "10.14"; } else stdenv;
 in
 buildPythonPackage rec {
   pname = "sourmash";
diff --git a/pkgs/development/python-modules/spacy-alignments/default.nix b/pkgs/development/python-modules/spacy-alignments/default.nix
index 66b1c2065512..9315953b5a25 100644
--- a/pkgs/development/python-modules/spacy-alignments/default.nix
+++ b/pkgs/development/python-modules/spacy-alignments/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # Fails because spacy_alignments module cannot be loaded correctly.
   doCheck = false;
diff --git a/pkgs/development/python-modules/spectral-cube/default.nix b/pkgs/development/python-modules/spectral-cube/default.nix
index 444761c46159..1c62233cc042 100644
--- a/pkgs/development/python-modules/spectral-cube/default.nix
+++ b/pkgs/development/python-modules/spectral-cube/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
 
   # On x86_darwin, this test fails with "Fatal Python error: Aborted"
   # when sandbox = true.
-  disabledTestPaths = lib.optionals stdenv.isDarwin [ "spectral_cube/tests/test_visualization.py" ];
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [ "spectral_cube/tests/test_visualization.py" ];
 
   pythonImportsCheck = [ "spectral_cube" ];
 
diff --git a/pkgs/development/python-modules/sqlalchemy-file/default.nix b/pkgs/development/python-modules/sqlalchemy-file/default.nix
index 3fad04838acd..0cd6d46988ae 100644
--- a/pkgs/development/python-modules/sqlalchemy-file/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy-file/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
     export LOCAL_PATH="$PWD/.storage"
   '';
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # very flaky, sandbox issues?
     # libcloud.storage.types.ContainerDoesNotExistError
     # sqlite3.OperationalError: attempt to write a readonly database
diff --git a/pkgs/development/python-modules/sshfs/default.nix b/pkgs/development/python-modules/sshfs/default.nix
index 6eaae84d6f77..f180d5c6c3a8 100644
--- a/pkgs/development/python-modules/sshfs/default.nix
+++ b/pkgs/development/python-modules/sshfs/default.nix
@@ -59,7 +59,7 @@ buildPythonPackage rec {
       # Test requires network access
       "test_config_expansions"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Test fails with sandbox enabled
       "test_checksum"
     ];
diff --git a/pkgs/development/python-modules/starlette-admin/default.nix b/pkgs/development/python-modules/starlette-admin/default.nix
index 41f3a1001345..a60768ef4220 100644
--- a/pkgs/development/python-modules/starlette-admin/default.nix
+++ b/pkgs/development/python-modules/starlette-admin/default.nix
@@ -85,7 +85,7 @@ buildPythonPackage rec {
     export LOCAL_PATH="$PWD/.storage"
   '';
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # flaky, depends on test order
     "test_ensuring_pk"
     # flaky, of-by-one
@@ -99,7 +99,7 @@ buildPythonPackage rec {
       # needs mongodb running on port 27017
       "tests/mongoengine"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # very flaky, sandbox issues?
       # libcloud.storage.types.ContainerDoesNotExistError
       # sqlite3.OperationalError: attempt to write a readonly database
diff --git a/pkgs/development/python-modules/streamlit/default.nix b/pkgs/development/python-modules/streamlit/default.nix
index 1ef214dd0a21..71ce1b81aa9a 100644
--- a/pkgs/development/python-modules/streamlit/default.nix
+++ b/pkgs/development/python-modules/streamlit/default.nix
@@ -76,7 +76,7 @@ buildPythonPackage rec {
     typing-extensions
     tzlocal
     validators
-  ] ++ lib.optionals (!stdenv.isDarwin) [ watchdog ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ watchdog ];
 
   # pypi package does not include the tests, but cannot be built with fetchFromGitHub
   doCheck = false;
diff --git a/pkgs/development/python-modules/sudachipy/default.nix b/pkgs/development/python-modules/sudachipy/default.nix
index d722b368756e..20233c1f7d9a 100644
--- a/pkgs/development/python-modules/sudachipy/default.nix
+++ b/pkgs/development/python-modules/sudachipy/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
     setuptools-rust
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   preBuild = ''
     cd python
diff --git a/pkgs/development/python-modules/sunpy/default.nix b/pkgs/development/python-modules/sunpy/default.nix
index e1bfc94ceab4..34cec394a104 100644
--- a/pkgs/development/python-modules/sunpy/default.nix
+++ b/pkgs/development/python-modules/sunpy/default.nix
@@ -103,7 +103,7 @@ buildPythonPackage rec {
   '';
 
   # darwin has write permission issues
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   preCheck = ''
     export HOME=$(mktemp -d)
diff --git a/pkgs/development/python-modules/supervisor/default.nix b/pkgs/development/python-modules/supervisor/default.nix
index e75998606b63..8a6bb95f3c3c 100644
--- a/pkgs/development/python-modules/supervisor/default.nix
+++ b/pkgs/development/python-modules/supervisor/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage rec {
 
   # wants to write to /tmp/foo which is likely already owned by another
   # nixbld user on hydra
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     mock
diff --git a/pkgs/development/python-modules/tbm-utils/default.nix b/pkgs/development/python-modules/tbm-utils/default.nix
index d9a0c20070de..9daa9648fe1e 100644
--- a/pkgs/development/python-modules/tbm-utils/default.nix
+++ b/pkgs/development/python-modules/tbm-utils/default.nix
@@ -61,14 +61,14 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # Skip on macOS because /etc/localtime is accessed through the pendulum
     # library, which is not allowed in a sandboxed build.
     "test_create_parser_filter_dates"
     "test_parse_args"
   ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # Skip on macOS because /etc/localtime is accessed through the pendulum
     # library, which is not allowed in a sandboxed build.
     "tests/test_datetime.py"
diff --git a/pkgs/development/python-modules/tensorboardx/default.nix b/pkgs/development/python-modules/tensorboardx/default.nix
index e0c4231be405..aab6bc7e9df6 100644
--- a/pkgs/development/python-modules/tensorboardx/default.nix
+++ b/pkgs/development/python-modules/tensorboardx/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
       # Requires network access (FileNotFoundError: [Errno 2] No such file or directory: 'wget')
       "test_onnx_graph"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Fails with a mysterious error in pytorch:
       # RuntimeError: required keyword attribute 'name' has the wrong type
       "test_pytorch_graph"
diff --git a/pkgs/development/python-modules/tensordict/default.nix b/pkgs/development/python-modules/tensordict/default.nix
index 697a8b29b956..1ad591e13be6 100644
--- a/pkgs/development/python-modules/tensordict/default.nix
+++ b/pkgs/development/python-modules/tensordict/default.nix
@@ -91,7 +91,7 @@ buildPythonPackage rec {
       "test_map_iter_interrupt_early"
     ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # torch._dynamo.exc.BackendCompilerFailed: backend='inductor' raised:
     # OpenMP support not found.
     "test/test_compile.py"
diff --git a/pkgs/development/python-modules/tensorflow-probability/default.nix b/pkgs/development/python-modules/tensorflow-probability/default.nix
index dd80ee581ee6..7b059969ebb6 100644
--- a/pkgs/development/python-modules/tensorflow-probability/default.nix
+++ b/pkgs/development/python-modules/tensorflow-probability/default.nix
@@ -63,7 +63,7 @@ let
     bazel = bazel_6;
 
     bazelTargets = [ ":pip_pkg" ];
-    LIBTOOL = lib.optionalString stdenv.isDarwin "${cctools}/bin/libtool";
+    LIBTOOL = lib.optionalString stdenv.hostPlatform.isDarwin "${cctools}/bin/libtool";
 
     fetchAttrs = {
       sha256 = "sha256-TbWcWYidyXuAMgBnO2/k0NKCzc4wThf2uUeC3QxdBJY=";
diff --git a/pkgs/development/python-modules/tensorflow/bin.nix b/pkgs/development/python-modules/tensorflow/bin.nix
index b0371e7a20f2..c187737eeead 100644
--- a/pkgs/development/python-modules/tensorflow/bin.nix
+++ b/pkgs/development/python-modules/tensorflow/bin.nix
@@ -45,7 +45,7 @@
 # - the source build doesn't work on NVIDIA Jetson platforms
 
 # unsupported combination
-assert !(stdenv.isDarwin && cudaSupport);
+assert !(stdenv.hostPlatform.isDarwin && cudaSupport);
 
 let
   packages = import ./binary-hashes.nix;
@@ -160,7 +160,7 @@ buildPythonPackage {
 
       rpath = lib.makeLibraryPath (libpaths ++ cudapaths);
     in
-    lib.optionalString stdenv.isLinux ''
+    lib.optionalString stdenv.hostPlatform.isLinux ''
       # This is an array containing all the directories in the tensorflow2
       # package that contain .so files.
       #
diff --git a/pkgs/development/python-modules/tensorflow/default.nix b/pkgs/development/python-modules/tensorflow/default.nix
index 31639d48f934..69df6b23d50a 100644
--- a/pkgs/development/python-modules/tensorflow/default.nix
+++ b/pkgs/development/python-modules/tensorflow/default.nix
@@ -107,7 +107,7 @@ let
   stdenv =
     if cudaSupport then
       cudaPackages.backendStdenv
-    else if originalStdenv.isDarwin then
+    else if originalStdenv.hostPlatform.isDarwin then
       llvmPackages.stdenv
     else
       originalStdenv;
@@ -274,7 +274,7 @@ let
     '';
   };
   bazel-build =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       _bazel-build.overrideAttrs (prev: {
         bazelFlags = prev.bazelFlags ++ [
           "--override_repository=rules_cc=${rules_cc_darwin_patched}"
@@ -341,16 +341,16 @@ let
         cudnnMerged
       ]
       ++ lib.optionals mklSupport [ mkl ]
-      ++ lib.optionals stdenv.isDarwin [
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [
         Foundation
         Security
       ]
-      ++ lib.optionals (!stdenv.isDarwin) [ nsync ];
+      ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ nsync ];
 
     # arbitrarily set to the current latest bazel version, overly careful
     TF_IGNORE_MAX_BAZEL_VERSION = true;
 
-    LIBTOOL = lib.optionalString stdenv.isDarwin "${cctools}/bin/libtool";
+    LIBTOOL = lib.optionalString stdenv.hostPlatform.isDarwin "${cctools}/bin/libtool";
 
     # Take as many libraries from the system as possible. Keep in sync with
     # list of valid syslibs in
@@ -395,7 +395,7 @@ let
         "wrapt"
         "zlib"
       ]
-      ++ lib.optionals (!stdenv.isDarwin) [
+      ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
         "nsync" # fails to build on darwin
       ]
     );
@@ -598,12 +598,12 @@ let
         maintainers = with lib.maintainers; [ abbradar ];
         platforms = with lib.platforms; linux ++ darwin;
         broken =
-          stdenv.isDarwin
+          stdenv.hostPlatform.isDarwin
           || !(xlaSupport -> cudaSupport)
           || !(cudaSupport -> builtins.hasAttr cudnnAttribute cudaPackages)
           || !(cudaSupport -> cudaPackages ? cudatoolkit);
       }
-      // lib.optionalAttrs stdenv.isDarwin {
+      // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
         timeout = 86400; # 24 hours
         maxSilent = 14400; # 4h, double the default of 7200s
       };
diff --git a/pkgs/development/python-modules/tensorstore/default.nix b/pkgs/development/python-modules/tensorstore/default.nix
index 90a550f42ab3..7a550a5c4ede 100644
--- a/pkgs/development/python-modules/tensorstore/default.nix
+++ b/pkgs/development/python-modules/tensorstore/default.nix
@@ -42,7 +42,7 @@ buildPythonPackage rec {
         or (throw "unsupported system/python version combination");
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   dependencies = [
     ml-dtypes
diff --git a/pkgs/development/python-modules/testpath/default.nix b/pkgs/development/python-modules/testpath/default.nix
index 7403d9c2af24..913226ddc78b 100644
--- a/pkgs/development/python-modules/testpath/default.nix
+++ b/pkgs/development/python-modules/testpath/default.nix
@@ -27,7 +27,7 @@ buildPythonPackage rec {
     rm testpath/cli-32.exe testpath/cli-64.exe
   '';
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Work around https://github.com/jupyter/testpath/issues/24
     export TMPDIR="/tmp"
   '';
diff --git a/pkgs/development/python-modules/thinc/default.nix b/pkgs/development/python-modules/thinc/default.nix
index d4c35796a270..99126084f28a 100644
--- a/pkgs/development/python-modules/thinc/default.nix
+++ b/pkgs/development/python-modules/thinc/default.nix
@@ -58,7 +58,7 @@ buildPythonPackage rec {
     setuptools
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Accelerate
     CoreFoundation
     CoreGraphics
diff --git a/pkgs/development/python-modules/tiktoken/default.nix b/pkgs/development/python-modules/tiktoken/default.nix
index ffcead40165d..9ce945ebf7c3 100644
--- a/pkgs/development/python-modules/tiktoken/default.nix
+++ b/pkgs/development/python-modules/tiktoken/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   dependencies = [
     requests
diff --git a/pkgs/development/python-modules/tinygrad/default.nix b/pkgs/development/python-modules/tinygrad/default.nix
index 387ee633264e..92aa341dd6ce 100644
--- a/pkgs/development/python-modules/tinygrad/default.nix
+++ b/pkgs/development/python-modules/tinygrad/default.nix
@@ -82,7 +82,7 @@ buildPythonPackage rec {
     [
       numpy
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # pyobjc-framework-libdispatch
       # pyobjc-framework-metal
     ];
@@ -177,6 +177,6 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ GaetanLepage ];
     # Requires unpackaged pyobjc-framework-libdispatch and pyobjc-framework-metal
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/tkinter/default.nix b/pkgs/development/python-modules/tkinter/default.nix
index beba9834e703..e051bbf86d98 100644
--- a/pkgs/development/python-modules/tkinter/default.nix
+++ b/pkgs/development/python-modules/tkinter/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage {
       mkdir -p $out/${py.sitePackages}
       mv lib/${py.libPrefix}/lib-dynload/_tkinter* $out/${py.sitePackages}/
     ''
-    + lib.optionalString (!stdenv.isDarwin) ''
+    + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       # Update the rpath to point to python without x11Support
       old_rpath=$(patchelf --print-rpath $out/${py.sitePackages}/_tkinter*)
       new_rpath=$(sed "s#${py}#${python}#g" <<< "$old_rpath" )
diff --git a/pkgs/development/python-modules/token-bucket/default.nix b/pkgs/development/python-modules/token-bucket/default.nix
index a2a9b7a04e7c..1af40f588f57 100644
--- a/pkgs/development/python-modules/token-bucket/default.nix
+++ b/pkgs/development/python-modules/token-bucket/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Token Bucket Implementation for Python Web Apps";
diff --git a/pkgs/development/python-modules/tokenizers/default.nix b/pkgs/development/python-modules/tokenizers/default.nix
index aca17db0e74e..36718c65513c 100644
--- a/pkgs/development/python-modules/tokenizers/default.nix
+++ b/pkgs/development/python-modules/tokenizers/default.nix
@@ -94,7 +94,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       Security
     ];
diff --git a/pkgs/development/python-modules/tololib/default.nix b/pkgs/development/python-modules/tololib/default.nix
index 03bb2f2ea81e..9548f2d77657 100644
--- a/pkgs/development/python-modules/tololib/default.nix
+++ b/pkgs/development/python-modules/tololib/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "tololib" ];
 
   # Network discovery doesn't work in the sandbox for darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Python Library for Controlling TOLO Sauna/Steam Bath Devices";
diff --git a/pkgs/development/python-modules/torch/bin.nix b/pkgs/development/python-modules/torch/bin.nix
index a31fb394cfdf..bcd5008984fa 100644
--- a/pkgs/development/python-modules/torch/bin.nix
+++ b/pkgs/development/python-modules/torch/bin.nix
@@ -49,13 +49,13 @@ buildPythonPackage {
 
   src = fetchurl srcs."${stdenv.system}-${pyVerNoDot}" or unsupported;
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     addDriverRunpath
     autoAddDriverRunpath
     autoPatchelfHook
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux (
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux (
     with cudaPackages;
     [
       # $out/${sitePackages}/nvfuser/_C*.so wants libnvToolsExt.so.1 but torch/lib only ships
@@ -75,7 +75,7 @@ buildPythonPackage {
     ]
   );
 
-  autoPatchelfIgnoreMissingDeps = lib.optionals stdenv.isLinux [
+  autoPatchelfIgnoreMissingDeps = lib.optionals stdenv.hostPlatform.isLinux [
     # This is the hardware-dependent userspace driver that comes from
     # nvidia_x11 package. It must be deployed at runtime in
     # /run/opengl-driver/lib or pointed at by LD_LIBRARY_PATH variable, rather
@@ -94,14 +94,14 @@ buildPythonPackage {
     setuptools
     sympy
     typing-extensions
-  ] ++ lib.optionals (stdenv.isLinux && stdenv.isx86_64) [ triton ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64) [ triton ];
 
   postInstall = ''
     # ONNX conversion
     rm -rf $out/bin
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     addAutoPatchelfSearchPath "$out/${python.sitePackages}/torch/lib"
   '';
 
@@ -112,7 +112,7 @@ buildPythonPackage {
   extraRunpaths = lib.optionals stdenv.hostPlatform.isLinux [
     "${lib.getLib cudaPackages.cuda_nvrtc}/lib"
   ];
-  postPhases = lib.optionals stdenv.isLinux [ "postPatchelfPhase" ];
+  postPhases = lib.optionals stdenv.hostPlatform.isLinux [ "postPatchelfPhase" ];
   postPatchelfPhase = ''
     while IFS= read -r -d $'\0' elf ; do
       for extra in $extraRunpaths ; do
diff --git a/pkgs/development/python-modules/torch/default.nix b/pkgs/development/python-modules/torch/default.nix
index 32b4525b60e8..6dd263806f0d 100644
--- a/pkgs/development/python-modules/torch/default.nix
+++ b/pkgs/development/python-modules/torch/default.nix
@@ -53,7 +53,7 @@
   click,
   typing-extensions,
   # ROCm build and `torch.compile` requires `triton`
-  tritonSupport ? (!stdenv.isDarwin),
+  tritonSupport ? (!stdenv.hostPlatform.isDarwin),
   triton,
 
   # Unit tests
@@ -62,7 +62,7 @@
 
   # Disable MKLDNN on aarch64-darwin, it negatively impacts performance,
   # this is also what official pytorch build does
-  mklDnnSupport ? !(stdenv.isDarwin && stdenv.isAarch64),
+  mklDnnSupport ? !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64),
 
   # virtual pkg that consistently instantiates blas across nixpkgs
   # See https://github.com/NixOS/nixpkgs/pull/83888
@@ -193,7 +193,7 @@ let
 
   brokenConditions = attrsets.filterAttrs (_: cond: cond) {
     "CUDA and ROCm are mutually exclusive" = cudaSupport && rocmSupport;
-    "CUDA is not targeting Linux" = cudaSupport && !stdenv.isLinux;
+    "CUDA is not targeting Linux" = cudaSupport && !stdenv.hostPlatform.isLinux;
     "Unsupported CUDA version" =
       cudaSupport
       && !(builtins.elem cudaPackages.cudaMajorVersion [
@@ -242,7 +242,7 @@ buildPythonPackage rec {
       ./passthrough-python-lib-rel-path.patch
     ]
     ++ lib.optionals cudaSupport [ ./fix-cmake-cuda-toolkit.patch ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       # pthreadpool added support for Grand Central Dispatch in April
       # 2020. However, this relies on functionality (DISPATCH_APPLY_AUTO)
       # that is available starting with macOS 10.13. However, our current
@@ -250,7 +250,7 @@ buildPythonPackage rec {
       # pthread support.
       ./pthreadpool-disable-gcd.diff
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       # Propagate CUPTI to Kineto by overriding the search path with environment variables.
       # https://github.com/pytorch/pytorch/pull/108847
       ./pytorch-pr-108847.patch
@@ -296,7 +296,7 @@ buildPythonPackage rec {
     # error: no member named 'aligned_alloc' in the global namespace; did you mean simply 'aligned_alloc'
     # This lib overrided aligned_alloc hence the error message. Tltr: his function is linkable but not in header.
     +
-      lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0")
+      lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11.0")
         ''
           substituteInPlace third_party/pocketfft/pocketfft_hdronly.h --replace-fail '#if (__cplusplus >= 201703L) && (!defined(__MINGW32__)) && (!defined(_MSC_VER))
           inline void *aligned_alloc(size_t align, size_t size)' '#if 0
@@ -492,8 +492,8 @@ buildPythonPackage rec {
     )
     ++ lib.optionals rocmSupport [ rocmPackages.llvm.openmp ]
     ++ lib.optionals (cudaSupport || rocmSupport) [ effectiveMagma ]
-    ++ lib.optionals stdenv.isLinux [ numactl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ numactl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Accelerate
       CoreServices
       libobjc
@@ -600,7 +600,7 @@ buildPythonPackage rec {
       mkdir -p "$cxxdev/nix-support"
       printWords "''${propagatedCxxBuildInputs[@]}" >> "$cxxdev/nix-support/propagated-build-inputs"
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       for f in $(ls $lib/lib/*.dylib); do
           install_name_tool -id $lib/lib/$(basename $f) $f || true
       done
@@ -620,7 +620,7 @@ buildPythonPackage rec {
   # This is a quick hack to add `libnvrtc` to the runpath so that torch can find
   # it when it is needed at runtime.
   extraRunpaths = lib.optionals cudaSupport [ "${lib.getLib cudaPackages.cuda_nvrtc}/lib" ];
-  postPhases = lib.optionals stdenv.isLinux [ "postPatchelfPhase" ];
+  postPhases = lib.optionals stdenv.hostPlatform.isLinux [ "postPatchelfPhase" ];
   postPatchelfPhase = ''
     while IFS= read -r -d $'\0' elf ; do
       for extra in $extraRunpaths ; do
diff --git a/pkgs/development/python-modules/torchaudio/bin.nix b/pkgs/development/python-modules/torchaudio/bin.nix
index 60b84d339ce2..d9aa2b6de388 100644
--- a/pkgs/development/python-modules/torchaudio/bin.nix
+++ b/pkgs/development/python-modules/torchaudio/bin.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
       ffmpeg_6.dev
       sox
     ]
-    ++ lib.optionals stdenv.isLinux (
+    ++ lib.optionals stdenv.hostPlatform.isLinux (
       with cudaPackages;
       [
         # $out/${sitePackages}/torchaudio/lib/libtorchaudio*.so wants libcudart.so.11.0 but torch/lib only ships
@@ -54,14 +54,14 @@ buildPythonPackage rec {
       ]
     );
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
     addDriverRunpath
   ];
 
   dependencies = [ torch-bin ];
 
-  preInstall = lib.optionals stdenv.isLinux ''
+  preInstall = lib.optionals stdenv.hostPlatform.isLinux ''
     addAutoPatchelfSearchPath "${torch-bin}/${python.sitePackages}/torch"
   '';
 
diff --git a/pkgs/development/python-modules/torchio/default.nix b/pkgs/development/python-modules/torchio/default.nix
index c0aae74f178f..3fbfe404febc 100644
--- a/pkgs/development/python-modules/torchio/default.nix
+++ b/pkgs/development/python-modules/torchio/default.nix
@@ -54,7 +54,7 @@ buildPythonPackage rec {
       # tries to download models:
       "test_load_all"
     ]
-    ++ lib.optionals stdenv.isAarch64 [
+    ++ lib.optionals stdenv.hostPlatform.isAarch64 [
       # RuntimeError: DataLoader worker (pid(s) <...>) exited unexpectedly
       "test_queue_multiprocessing"
     ];
diff --git a/pkgs/development/python-modules/torchsnapshot/default.nix b/pkgs/development/python-modules/torchsnapshot/default.nix
index dc1e66156a7e..c28ce3f55e71 100644
--- a/pkgs/development/python-modules/torchsnapshot/default.nix
+++ b/pkgs/development/python-modules/torchsnapshot/default.nix
@@ -66,6 +66,6 @@ buildPythonPackage rec {
       # https://github.com/pytorch/torchsnapshot/issues/175
       pythonAtLeast "3.12"
       # ModuleNotFoundError: No module named 'torch._C._distributed_c10d'; 'torch._C' is not a package
-      || stdenv.isDarwin;
+      || stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/torchvision/bin.nix b/pkgs/development/python-modules/torchvision/bin.nix
index 69a573b777d1..ea03954c14d7 100644
--- a/pkgs/development/python-modules/torchvision/bin.nix
+++ b/pkgs/development/python-modules/torchvision/bin.nix
@@ -39,13 +39,13 @@ buildPythonPackage {
   # Note that we don't rely on config.cudaSupport here, because the Linux wheels all come built with CUDA support.
   buildInputs =
     with cudaPackages;
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       # $out/${sitePackages}/torchvision/_C.so wants libcudart.so.11.0 but torchvision.libs only ships
       # libcudart.$hash.so.11.0
       cuda_cudart
     ];
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     addDriverRunpath
     autoPatchelfHook
   ];
@@ -60,7 +60,7 @@ buildPythonPackage {
 
   pythonImportsCheck = [ "torchvision" ];
 
-  preInstall = lib.optionalString stdenv.isLinux ''
+  preInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     addAutoPatchelfSearchPath "${torch-bin}/${python.sitePackages}/torch"
   '';
 
diff --git a/pkgs/development/python-modules/trackpy/default.nix b/pkgs/development/python-modules/trackpy/default.nix
index a12ffea156bd..91945de8dc89 100644
--- a/pkgs/development/python-modules/trackpy/default.nix
+++ b/pkgs/development/python-modules/trackpy/default.nix
@@ -40,7 +40,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # specifically needed for darwin
     export HOME=$(mktemp -d)
     mkdir -p $HOME/.matplotlib
@@ -55,6 +55,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/soft-matter/trackpy/releases/tag/v${version}";
     license = licenses.bsd3;
     maintainers = [ ];
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/development/python-modules/transitions/default.nix b/pkgs/development/python-modules/transitions/default.nix
index 74ce55dd4b13..545e5667da8c 100644
--- a/pkgs/development/python-modules/transitions/default.nix
+++ b/pkgs/development/python-modules/transitions/default.nix
@@ -47,7 +47,7 @@ buildPythonPackage rec {
       "test_diagram"
       "test_ordered_with_graph"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Upstream issue https://github.com/pygraphviz/pygraphviz/issues/441
       "test_binary_stream"
     ];
diff --git a/pkgs/development/python-modules/trezor/default.nix b/pkgs/development/python-modules/trezor/default.nix
index 302c5d975676..62c94ce4bd7c 100644
--- a/pkgs/development/python-modules/trezor/default.nix
+++ b/pkgs/development/python-modules/trezor/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
     mnemonic
     requests
     typing-extensions
-  ] ++ lib.optionals stdenv.isLinux [ trezor-udev-rules ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ trezor-udev-rules ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/trio-websocket/default.nix b/pkgs/development/python-modules/trio-websocket/default.nix
index 39a9ee4baa4f..2804bcaa76e5 100644
--- a/pkgs/development/python-modules/trio-websocket/default.nix
+++ b/pkgs/development/python-modules/trio-websocket/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
       "test_client_connect_networking_error"
       "test_finalization_dropped_exception"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Failed: DID NOT RAISE <class 'ValueError'>
       "test_finalization_dropped_exception"
       # Timing related
diff --git a/pkgs/development/python-modules/trio/default.nix b/pkgs/development/python-modules/trio/default.nix
index b4e37ee448f6..968d67b27adb 100644
--- a/pkgs/development/python-modules/trio/default.nix
+++ b/pkgs/development/python-modules/trio/default.nix
@@ -59,7 +59,7 @@ buildPythonPackage rec {
   ] ++ lib.optionals (pythonOlder "3.11") [ exceptiongroup ];
 
   # tests are failing on Darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     astor
diff --git a/pkgs/development/python-modules/trytond/default.nix b/pkgs/development/python-modules/trytond/default.nix
index 8a2bdcfd5d8a..b12ef6e9061e 100644
--- a/pkgs/development/python-modules/trytond/default.nix
+++ b/pkgs/development/python-modules/trytond/default.nix
@@ -90,7 +90,7 @@ buildPythonPackage rec {
     homepage = "http://www.tryton.org/";
     changelog = "https://foss.heptapod.net/tryton/tryton/-/blob/trytond-${version}/trytond/CHANGELOG?ref_type=tags";
     license = licenses.gpl3Plus;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [
       udono
       johbo
diff --git a/pkgs/development/python-modules/twisted/default.nix b/pkgs/development/python-modules/twisted/default.nix
index ffeee44aa8c7..8e401844adfc 100644
--- a/pkgs/development/python-modules/twisted/default.nix
+++ b/pkgs/development/python-modules/twisted/default.nix
@@ -138,7 +138,7 @@ buildPythonPackage rec {
       substituteInPlace src/twisted/test/test_failure.py \
         --replace "from cython_test_exception_raiser import raiser  # type: ignore[import]" "raiser = None"
     ''
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       echo 'PTYProcessTestsBuilder_EPollReactorTests.test_openFileDescriptors.skip = "invalid syntax"'>> src/twisted/internet/test/test_process.py
       echo 'PTYProcessTestsBuilder_PollReactorTests.test_openFileDescriptors.skip = "invalid syntax"'>> src/twisted/internet/test/test_process.py
       echo 'UNIXTestsBuilder_EPollReactorTests.test_sendFileDescriptorTriggersPauseProducing.skip = "sendFileDescriptor producer was not paused"'>> src/twisted/internet/test/test_unix.py
@@ -149,7 +149,7 @@ buildPythonPackage rec {
       substituteInPlace src/twisted/python/_inotify.py --replace \
         "ctypes.util.find_library(\"c\")" "'${stdenv.cc.libc}/lib/libc.so.6'"
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       echo 'ProcessTestsBuilder_AsyncioSelectorReactorTests.test_openFileDescriptors.skip = "invalid syntax"'>> src/twisted/internet/test/test_process.py
       echo 'ProcessTestsBuilder_SelectReactorTests.test_openFileDescriptors.skip = "invalid syntax"'>> src/twisted/internet/test/test_process.py
       echo 'ProcessTestsBuilder_AsyncioSelectorReactorTests.test_processEnded.skip = "exit code 120"' >> src/twisted/internet/test/test_process.py
@@ -175,7 +175,7 @@ buildPythonPackage rec {
     ++ passthru.optional-dependencies.http2
     ++ passthru.optional-dependencies.serial
     # not supported on aarch64-darwin: https://github.com/pyca/pyopenssl/issues/873
-    ++ lib.optionals (!(stdenv.isDarwin && stdenv.isAarch64)) passthru.optional-dependencies.tls;
+    ++ lib.optionals (!(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) passthru.optional-dependencies.tls;
 
   checkPhase = ''
     export SOURCE_DATE_EPOCH=315532800
diff --git a/pkgs/development/python-modules/txtorcon/default.nix b/pkgs/development/python-modules/txtorcon/default.nix
index 6c6f7c86b3a0..eac293ac1e16 100644
--- a/pkgs/development/python-modules/txtorcon/default.nix
+++ b/pkgs/development/python-modules/txtorcon/default.nix
@@ -52,7 +52,7 @@ buildPythonPackage rec {
     geoip
   ];
 
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64);
 
   meta = with lib; {
     description = "Twisted-based Tor controller client, with state-tracking and configuration abstractions";
diff --git a/pkgs/development/python-modules/typer/default.nix b/pkgs/development/python-modules/typer/default.nix
index 9839f6d6c55d..74bb969473a7 100644
--- a/pkgs/development/python-modules/typer/default.nix
+++ b/pkgs/development/python-modules/typer/default.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
     # fails also on Linux
     "test_show_completion"
     "test_install_completion"
-  ] ++ lib.optionals (stdenv.isLinux && stdenv.isAarch64) [ "test_install_completion" ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [ "test_install_completion" ];
 
   pythonImportsCheck = [ "typer" ];
 
diff --git a/pkgs/development/python-modules/tzlocal/default.nix b/pkgs/development/python-modules/tzlocal/default.nix
index 81f1ed1d2b80..a4e6ba12061c 100644
--- a/pkgs/development/python-modules/tzlocal/default.nix
+++ b/pkgs/development/python-modules/tzlocal/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
     "test_conflicting"
     "test_noconflict"
     "test_symlink_localtime"
-  ] ++ lib.optional stdenv.isDarwin "test_assert_tz_offset";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "test_assert_tz_offset";
 
   pythonImportsCheck = [ "tzlocal" ];
 
diff --git a/pkgs/development/python-modules/uamqp/default.nix b/pkgs/development/python-modules/uamqp/default.nix
index 0bde984b93e5..89063357a565 100644
--- a/pkgs/development/python-modules/uamqp/default.nix
+++ b/pkgs/development/python-modules/uamqp/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   };
 
   patches =
-    lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       ./darwin-azure-c-shared-utility-corefoundation.patch
     ]
     ++ [
@@ -53,7 +53,7 @@ buildPythonPackage rec {
       ./clang-fix-incompatible-function-pointer-conversion.patch
     ];
 
-  postPatch = lib.optionalString (stdenv.isDarwin && !stdenv.isx86_64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isx86_64) ''
     # force darwin aarch64 to use openssl instead of applessl, removing
     # some quirks upstream thinks they need to use openssl on macos
     sed -i \
@@ -76,7 +76,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       CFNetwork
       Security
diff --git a/pkgs/development/python-modules/ubelt/default.nix b/pkgs/development/python-modules/ubelt/default.nix
index 85764d05986c..ae9c6b2a648d 100644
--- a/pkgs/development/python-modules/ubelt/default.nix
+++ b/pkgs/development/python-modules/ubelt/default.nix
@@ -51,7 +51,7 @@ buildPythonPackage rec {
     export HOME=$TMPDIR
   '';
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # fail due to sandbox environment
     "CacheStamp.expired"
     "userhome"
diff --git a/pkgs/development/python-modules/uharfbuzz/default.nix b/pkgs/development/python-modules/uharfbuzz/default.nix
index 0dc8fea9bc8a..de30a7809166 100644
--- a/pkgs/development/python-modules/uharfbuzz/default.nix
+++ b/pkgs/development/python-modules/uharfbuzz/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
     setuptools-scm
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ ApplicationServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ ApplicationServices ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
diff --git a/pkgs/development/python-modules/unicorn/default.nix b/pkgs/development/python-modules/unicorn/default.nix
index de3a0f6a3040..0814b63ef41b 100644
--- a/pkgs/development/python-modules/unicorn/default.nix
+++ b/pkgs/development/python-modules/unicorn/default.nix
@@ -26,13 +26,13 @@ buildPythonPackage rec {
 
   # needed on non-x86 linux
   setupPyBuildFlags =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       "--plat-name"
       "linux"
     ]
     # aarch64 only available from MacOS SDK 11 onwards, so fix the version tag.
     # otherwise, bdist_wheel may detect "macosx_10_6_arm64" which doesn't make sense.
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       "--plat-name"
       "macosx_11_0"
     ];
diff --git a/pkgs/development/python-modules/unrardll/default.nix b/pkgs/development/python-modules/unrardll/default.nix
index 14a32c0ba862..b539d805f66e 100644
--- a/pkgs/development/python-modules/unrardll/default.nix
+++ b/pkgs/development/python-modules/unrardll/default.nix
@@ -18,9 +18,9 @@ buildPythonPackage rec {
 
   buildInputs = [ unrar ];
 
-  NIX_CFLAGS_LINK = lib.optionalString stdenv.isDarwin "-headerpad_max_install_names";
+  NIX_CFLAGS_LINK = lib.optionalString stdenv.hostPlatform.isDarwin "-headerpad_max_install_names";
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libunrar.so ${unrar}/lib/libunrar.so $out/lib/python*/site-packages/unrardll/unrar.*-darwin.so
     install_name_tool -change libunrar.so ${unrar}/lib/libunrar.so build/lib.*/unrardll/unrar.*-darwin.so
   '';
diff --git a/pkgs/development/python-modules/uvicorn/tests.nix b/pkgs/development/python-modules/uvicorn/tests.nix
index 24dd8d2b848c..b5d7cee2f7c5 100644
--- a/pkgs/development/python-modules/uvicorn/tests.nix
+++ b/pkgs/development/python-modules/uvicorn/tests.nix
@@ -34,7 +34,7 @@ buildPythonPackage {
     wsproto
   ] ++ uvicorn.optional-dependencies.standard;
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/python-modules/uvloop/default.nix b/pkgs/development/python-modules/uvloop/default.nix
index 06447432f218..f5d0e08cbb28 100644
--- a/pkgs/development/python-modules/uvloop/default.nix
+++ b/pkgs/development/python-modules/uvloop/default.nix
@@ -41,7 +41,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ libuv ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreServices
       ApplicationServices
     ];
@@ -61,7 +61,7 @@ buildPythonPackage rec {
       "--deselect=tests/test_process.py::Test_UV_Process::test_process_streams_redirect"
       "--deselect=tests/test_process.py::Test_AIO_Process::test_process_streams_redirect"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # Segmentation fault
       "--deselect=tests/test_fs_event.py::Test_UV_FS_EVENT_RENAME::test_fs_event_rename"
       # Broken: https://github.com/NixOS/nixpkgs/issues/160904
@@ -78,7 +78,7 @@ buildPythonPackage rec {
       # force using installed/compiled uvloop
       rm -rf uvloop
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Work around "OSError: AF_UNIX path too long"
       # https://github.com/MagicStack/uvloop/issues/463
       export TMPDIR="/tmp"
diff --git a/pkgs/development/python-modules/vector/default.nix b/pkgs/development/python-modules/vector/default.nix
index ae7782699ef9..cf1ed3878e36 100644
--- a/pkgs/development/python-modules/vector/default.nix
+++ b/pkgs/development/python-modules/vector/default.nix
@@ -68,7 +68,7 @@ buildPythonPackage rec {
       "test_rhophi_eta_tau"
       "test_xy_eta_tau"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       # AssertionError: assert 2.1073424255447017e-08 == 0.0
       "test_issue_463"
     ];
diff --git a/pkgs/development/python-modules/virtkey/default.nix b/pkgs/development/python-modules/virtkey/default.nix
index 4815ce63413f..553721e83eea 100644
--- a/pkgs/development/python-modules/virtkey/default.nix
+++ b/pkgs/development/python-modules/virtkey/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Extension to emulate keypresses and to get the layout information from the X server";
     homepage = "https://launchpad.net/virtkey";
     license = licenses.gpl3;
diff --git a/pkgs/development/python-modules/vowpalwabbit/default.nix b/pkgs/development/python-modules/vowpalwabbit/default.nix
index 7f4feb2ba9ad..558d47529b68 100644
--- a/pkgs/development/python-modules/vowpalwabbit/default.nix
+++ b/pkgs/development/python-modules/vowpalwabbit/default.nix
@@ -55,7 +55,7 @@ buildPythonPackage rec {
   dontUseCmakeConfigure = true;
 
   # Python ctypes.find_library uses DYLD_LIBRARY_PATH.
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH="${python.pkgs.boost}/lib"
   '';
 
@@ -71,6 +71,6 @@ buildPythonPackage rec {
     license = licenses.bsd3;
     maintainers = with maintainers; [ teh ];
     # Test again when new version is released
-    broken = stdenv.isLinux;
+    broken = stdenv.hostPlatform.isLinux;
   };
 }
diff --git a/pkgs/development/python-modules/wandb/default.nix b/pkgs/development/python-modules/wandb/default.nix
index fbd5d9baabf5..c0c42e58408d 100644
--- a/pkgs/development/python-modules/wandb/default.nix
+++ b/pkgs/development/python-modules/wandb/default.nix
@@ -282,11 +282,11 @@ buildPythonPackage rec {
       # See https://github.com/wandb/wandb/issues/6836
       "tests/pytest_tests/unit_tests_old/test_logging.py"
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       # Same as above
       "tests/pytest_tests/unit_tests/test_artifacts/test_storage.py"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Same as above
       "tests/pytest_tests/unit_tests/test_lib/test_filesystem.py"
     ];
@@ -303,7 +303,7 @@ buildPythonPackage rec {
       "test_pytorch_saved_model"
       "test_tensorflow_keras_saved_model"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Disable test that fails on darwin due to issue with python3Packages.psutil:
       # https://github.com/giampaolo/psutil/issues/1219
       "test_tpu_system_stats"
diff --git a/pkgs/development/python-modules/wasmer/default.nix b/pkgs/development/python-modules/wasmer/default.nix
index 8408780ef637..c903ede48d27 100644
--- a/pkgs/development/python-modules/wasmer/default.nix
+++ b/pkgs/development/python-modules/wasmer/default.nix
@@ -56,7 +56,7 @@ let
           --replace "package.metadata.maturin" "broken"
       '';
 
-      buildInputs = lib.optionals stdenv.isDarwin [ libiconv ] ++ extraBuildInputs;
+      buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ] ++ extraBuildInputs;
 
       inherit buildAndTestSubdir;
 
diff --git a/pkgs/development/python-modules/watchdog/default.nix b/pkgs/development/python-modules/watchdog/default.nix
index 4e83fb026425..2a1633de0512 100644
--- a/pkgs/development/python-modules/watchdog/default.nix
+++ b/pkgs/development/python-modules/watchdog/default.nix
@@ -26,9 +26,9 @@ buildPythonPackage rec {
 
   # force kqueue on x86_64-darwin, because our api version does
   # not support fsevents
-  patches = lib.optionals (stdenv.isDarwin && !stdenv.isAarch64) [ ./force-kqueue.patch ];
+  patches = lib.optionals (stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isAarch64) [ ./force-kqueue.patch ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   passthru.optional-dependencies.watchmedo = [ pyyaml ];
 
@@ -50,13 +50,13 @@ buildPythonPackage rec {
       "--deselect=tests/test_emitter.py::test_create_wrong_encoding"
       "--deselect=tests/test_emitter.py::test_close"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # fails to stop process in teardown
       "--deselect=tests/test_0_watchmedo.py::test_auto_restart_subprocess_termination"
       # assert cap.out.splitlines(keepends=False).count('+++++ 0') == 2 != 3
       "--deselect=tests/test_0_watchmedo.py::test_auto_restart_on_file_change_debounce"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
       # FileCreationEvent != FileDeletionEvent
       "--deselect=tests/test_emitter.py::test_separate_consecutive_moves"
       "--deselect=tests/test_observers_polling.py::test___init__"
@@ -66,7 +66,7 @@ buildPythonPackage rec {
       # AttributeError: '_thread.RLock' object has no attribute 'key'"
       "--deselect=tests/test_skip_repeats_queue.py::test_eventlet_monkey_patching"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # segfaults
       "--deselect=tests/test_delayed_queue.py::test_delayed_get"
       "--deselect=tests/test_0_watchmedo.py::test_tricks_from_file"
@@ -89,7 +89,7 @@ buildPythonPackage rec {
       # tests timeout easily
       "tests/test_inotify_buffer.py"
     ]
-    ++ lib.optionals (stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
       # segfaults the testsuite
       "tests/test_emitter.py"
       # unsupported on x86_64-darwin
diff --git a/pkgs/development/python-modules/watchfiles/default.nix b/pkgs/development/python-modules/watchfiles/default.nix
index 22cd171afae5..3b09081249b0 100644
--- a/pkgs/development/python-modules/watchfiles/default.nix
+++ b/pkgs/development/python-modules/watchfiles/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage rec {
     hash = "sha256-n9yN/VRNQWCxh+BoliIMkKqJC51inpB9DQ9WtqR4oA0=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     libiconv
   ];
diff --git a/pkgs/development/python-modules/webdataset/default.nix b/pkgs/development/python-modules/webdataset/default.nix
index 3c5b74eed4ae..da172aa79ff7 100644
--- a/pkgs/development/python-modules/webdataset/default.nix
+++ b/pkgs/development/python-modules/webdataset/default.nix
@@ -67,16 +67,16 @@ buildPythonPackage rec {
       "test_unbatched"
       "test_yaml3"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # pickling error
       "test_background_download"
     ]
-    ++ lib.optionals (stdenv.isx86_64 && stdenv.isDarwin) [
+    ++ lib.optionals (stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin) [
       "test_concurrent_access"
       # fails to patch 'init_process_group' from torch.distributed
       "TestDistributedChunkedSampler"
     ]
-    ++ lib.optionals (stdenv.isAarch64 && stdenv.isLinux) [
+    ++ lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux) [
       # segfaults on aarch64-linux
       "test_webloader"
       "test_webloader2"
@@ -84,7 +84,7 @@ buildPythonPackage rec {
       "test_webloader_unbatched"
     ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # AttributeError: <module 'torch.distributed' from /nix/store/...
     "tests/test_wids.py"
 
diff --git a/pkgs/development/python-modules/webrtc-noise-gain/default.nix b/pkgs/development/python-modules/webrtc-noise-gain/default.nix
index 68cc5938bc88..3df09891253d 100644
--- a/pkgs/development/python-modules/webrtc-noise-gain/default.nix
+++ b/pkgs/development/python-modules/webrtc-noise-gain/default.nix
@@ -35,7 +35,7 @@ buildPythonPackage rec {
 
   buildInputs = [
     abseil-cpp
-  ] ++ lib.optionals (stdenv.isDarwin) [ darwin.apple_sdk.frameworks.CoreServices ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ darwin.apple_sdk.frameworks.CoreServices ];
 
   pythonImportsCheck = [ "webrtc_noise_gain" ];
 
diff --git a/pkgs/development/python-modules/websockets/default.nix b/pkgs/development/python-modules/websockets/default.nix
index f2c7ce30d799..907024735afb 100644
--- a/pkgs/development/python-modules/websockets/default.nix
+++ b/pkgs/development/python-modules/websockets/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [ unittestCheckHook ];
 
   # Tests fail on Darwin with `OSError: AF_UNIX path too long`
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   pythonImportsCheck = [ "websockets" ];
 
diff --git a/pkgs/development/python-modules/websockify/default.nix b/pkgs/development/python-modules/websockify/default.nix
index 2dee5231dc72..2aaa1078200b 100644
--- a/pkgs/development/python-modules/websockify/default.nix
+++ b/pkgs/development/python-modules/websockify/default.nix
@@ -36,7 +36,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [ pytestCheckHook ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # this test failed on macos
     # https://github.com/novnc/websockify/issues/552
     "test_socket_set_keepalive_options"
diff --git a/pkgs/development/python-modules/webssh/default.nix b/pkgs/development/python-modules/webssh/default.nix
index b18dcd38c2a7..f7166b86e459 100644
--- a/pkgs/development/python-modules/webssh/default.nix
+++ b/pkgs/development/python-modules/webssh/default.nix
@@ -38,6 +38,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/huashengdun/webssh/releases/tag/v${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ davidtwco ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/python-modules/werkzeug/default.nix b/pkgs/development/python-modules/werkzeug/default.nix
index 43758f06157b..be6cd79b788a 100644
--- a/pkgs/development/python-modules/werkzeug/default.nix
+++ b/pkgs/development/python-modules/werkzeug/default.nix
@@ -44,7 +44,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ markupsafe ];
 
   passthru.optional-dependencies = {
-    watchdog = lib.optionals (!stdenv.isDarwin) [
+    watchdog = lib.optionals (!stdenv.hostPlatform.isDarwin) [
       # watchdog requires macos-sdk 10.13
       watchdog
     ];
@@ -63,7 +63,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "werkzeug" ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [ "test_get_machine_id" ];
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [ "test_get_machine_id" ];
 
   disabledTestPaths = [
     # ConnectionRefusedError: [Errno 111] Connection refused
diff --git a/pkgs/development/python-modules/whenever/default.nix b/pkgs/development/python-modules/whenever/default.nix
index cdb547e65dac..9f6e763a149a 100644
--- a/pkgs/development/python-modules/whenever/default.nix
+++ b/pkgs/development/python-modules/whenever/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
diff --git a/pkgs/development/python-modules/wxpython/4.2.nix b/pkgs/development/python-modules/wxpython/4.2.nix
index 8ad524a17c9b..be3a181da9aa 100644
--- a/pkgs/development/python-modules/wxpython/4.2.nix
+++ b/pkgs/development/python-modules/wxpython/4.2.nix
@@ -75,14 +75,14 @@ buildPythonPackage rec {
     sip
     which
     wxGTK
-  ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs =
     [
       wxGTK
       SDL
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       gst_all_1.gst-plugins-base
       gst_all_1.gstreamer
       libGL
diff --git a/pkgs/development/python-modules/xlib/default.nix b/pkgs/development/python-modules/xlib/default.nix
index a24b9fe21a6a..fb5685de6adf 100644
--- a/pkgs/development/python-modules/xlib/default.nix
+++ b/pkgs/development/python-modules/xlib/default.nix
@@ -32,7 +32,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ six ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     pytestCheckHook
diff --git a/pkgs/development/python-modules/xnd/default.nix b/pkgs/development/python-modules/xnd/default.nix
index dcf396c079e5..8317f30e462b 100644
--- a/pkgs/development/python-modules/xnd/default.nix
+++ b/pkgs/development/python-modules/xnd/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage {
       mkdir $out/include
       cp python/xnd/*.h $out/include
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -add_rpath ${libxnd}/lib $out/${python.sitePackages}/xnd/_xnd.*.so
     '';
 
diff --git a/pkgs/development/python-modules/y-py/default.nix b/pkgs/development/python-modules/y-py/default.nix
index 7284ceca55a4..b01d8f5dcca3 100644
--- a/pkgs/development/python-modules/y-py/default.nix
+++ b/pkgs/development/python-modules/y-py/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
     rustc
   ];
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   pythonImportsCheck = [ "y_py" ];
 
diff --git a/pkgs/development/python-modules/yamllint/default.nix b/pkgs/development/python-modules/yamllint/default.nix
index ff7560587aa4..b645cd8b56e6 100644
--- a/pkgs/development/python-modules/yamllint/default.nix
+++ b/pkgs/development/python-modules/yamllint/default.nix
@@ -38,7 +38,7 @@ buildPythonPackage rec {
       # test failure reported upstream: https://github.com/adrienverge/yamllint/issues/373
       "test_find_files_recursively"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # locale tests are broken on BSDs; see https://github.com/adrienverge/yamllint/issues/307
       "test_locale_accents"
       "test_locale_case"
diff --git a/pkgs/development/python-modules/zeroc-ice/default.nix b/pkgs/development/python-modules/zeroc-ice/default.nix
index 8a61451a6221..7d6cc236f8f4 100644
--- a/pkgs/development/python-modules/zeroc-ice/default.nix
+++ b/pkgs/development/python-modules/zeroc-ice/default.nix
@@ -29,7 +29,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "Ice" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://zeroc.com/";
     license = licenses.gpl2;
     description = "Comprehensive RPC framework with support for Python, C++, .NET, Java, JavaScript and more";
diff --git a/pkgs/development/python-modules/zigpy/default.nix b/pkgs/development/python-modules/zigpy/default.nix
index ed182e36c461..c430b0853991 100644
--- a/pkgs/development/python-modules/zigpy/default.nix
+++ b/pkgs/development/python-modules/zigpy/default.nix
@@ -75,7 +75,7 @@ buildPythonPackage rec {
   disabledTests = [
     # assert quirked.quirk_metadata.quirk_location.endswith("zigpy/tests/test_quirks_v2.py]-line:104") is False
     "test_quirks_v2"
-  ] ++ lib.optionals (stdenv.isLinux && stdenv.isx86_64) [ "test_periodic_scan_priority" ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64) [ "test_periodic_scan_priority" ];
 
   disabledTestPaths = [
     # Tests require network access
diff --git a/pkgs/development/python2-modules/cffi/default.nix b/pkgs/development/python2-modules/cffi/default.nix
index adeda6e90d22..aa6f49f95e3c 100644
--- a/pkgs/development/python2-modules/cffi/default.nix
+++ b/pkgs/development/python2-modules/cffi/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, cffi }:
 
 if cffi == null then null else cffi.overridePythonAttrs {
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # cannot load library 'c'
     "test_FILE"
     "test_FILE_object"
diff --git a/pkgs/development/python2-modules/configparser/default.nix b/pkgs/development/python2-modules/configparser/default.nix
index 5cb0e9cf8961..956c12f44c5d 100644
--- a/pkgs/development/python2-modules/configparser/default.nix
+++ b/pkgs/development/python2-modules/configparser/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   nativeBuildInputs = [ setuptools-scm ];
 
   preConfigure = ''
-    export LC_ALL=${if stdenv.isDarwin then "en_US" else "C"}.UTF-8
+    export LC_ALL=${if stdenv.hostPlatform.isDarwin then "en_US" else "C"}.UTF-8
   '';
 
   meta = with lib; {
diff --git a/pkgs/development/python2-modules/futures/default.nix b/pkgs/development/python2-modules/futures/default.nix
index d1cdb679d0d1..5cad6c13029d 100644
--- a/pkgs/development/python2-modules/futures/default.nix
+++ b/pkgs/development/python2-modules/futures/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
     ${python.interpreter} test_futures.py
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Backport of the concurrent.futures package from Python 3.2";
diff --git a/pkgs/development/python2-modules/jinja2/default.nix b/pkgs/development/python2-modules/jinja2/default.nix
index 3b593338763f..1b6948a66aad 100644
--- a/pkgs/development/python2-modules/jinja2/default.nix
+++ b/pkgs/development/python2-modules/jinja2/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
   # Multiple tests run out of stack space on 32bit systems with python2.
   # See https://github.com/pallets/jinja/issues/1158
   # warnings are no longer being filtered correctly for python2
-  doCheck = !stdenv.is32bit && isPy3k;
+  doCheck = !stdenv.hostPlatform.is32bit && isPy3k;
 
   checkPhase = ''
     pytest -v tests -W ignore::DeprecationWarning
diff --git a/pkgs/development/python2-modules/pygobject/default.nix b/pkgs/development/python2-modules/pygobject/default.nix
index 00c98fba39af..3202c6e6af76 100644
--- a/pkgs/development/python2-modules/pygobject/default.nix
+++ b/pkgs/development/python2-modules/pygobject/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   outputs = [ "out" "devdoc" ];
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     ./pygobject-2.0-fix-darwin.patch
     (fetchpatch {
       url = "https://github.com/macports/macports-ports/raw/f2975d5bbbc2459c661905c5a850cc661fa32f55/python/py-gobject/files/py-gobject-dynamic_lookup-11.patch";
diff --git a/pkgs/development/python2-modules/pygtk/default.nix b/pkgs/development/python2-modules/pygtk/default.nix
index 003474ee8582..68a7dba4c8e3 100644
--- a/pkgs/development/python2-modules/pygtk/default.nix
+++ b/pkgs/development/python2-modules/pygtk/default.nix
@@ -37,8 +37,8 @@ buildPythonPackage rec {
 
   buildPhase = "buildPhase";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-ObjC"
-    + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) " -lpython2.7";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-ObjC"
+    + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) " -lpython2.7";
 
   installPhase = "installPhase";
 
diff --git a/pkgs/development/r-modules/default.nix b/pkgs/development/r-modules/default.nix
index 43aacdddb6e6..3ac1f52f2e76 100644
--- a/pkgs/development/r-modules/default.nix
+++ b/pkgs/development/r-modules/default.nix
@@ -339,7 +339,7 @@ let
     adimpro = [ pkgs.imagemagick ];
     animation = [ pkgs.which ];
     Apollonius = with pkgs; [ pkg-config gmp.dev mpfr.dev ];
-    arrow = with pkgs; [ pkg-config cmake ] ++ lib.optionals stdenv.isDarwin [ intltool ];
+    arrow = with pkgs; [ pkg-config cmake ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ intltool ];
     audio = [ pkgs.portaudio ];
     BayesSAE = [ pkgs.gsl ];
     BayesVarSel = [ pkgs.gsl ];
@@ -363,7 +363,7 @@ let
     clarabel = [ pkgs.cargo ];
     curl = [ pkgs.curl.dev ];
     CytoML = [ pkgs.libxml2.dev ];
-    data_table = with pkgs; [ pkg-config zlib.dev ] ++ lib.optional stdenv.isDarwin pkgs.llvmPackages.openmp;
+    data_table = with pkgs; [ pkg-config zlib.dev ] ++ lib.optional stdenv.hostPlatform.isDarwin pkgs.llvmPackages.openmp;
     devEMF = with pkgs; [ xorg.libXft.dev ];
     diversitree = with pkgs; [ gsl fftw ];
     exactextractr = [ pkgs.geos ];
@@ -423,7 +423,7 @@ let
     rvg = [ pkgs.libpng.dev ];
     MAGEE = [ pkgs.zlib.dev pkgs.bzip2.dev ];
     magick = [ pkgs.imagemagick.dev ];
-    ModelMetrics = lib.optional stdenv.isDarwin pkgs.llvmPackages.openmp;
+    ModelMetrics = lib.optional stdenv.hostPlatform.isDarwin pkgs.llvmPackages.openmp;
     mvabund = [ pkgs.gsl ];
     mwaved = [ pkgs.fftw.dev ];
     mzR = with pkgs; [ zlib netcdf ];
@@ -438,7 +438,7 @@ let
     pander = with pkgs; [ pandoc which ];
     pbdMPI = [ pkgs.mpi ];
     pbdPROF = [ pkgs.mpi ];
-    pbdZMQ = [ pkgs.pkg-config ] ++ lib.optionals stdenv.isDarwin [ pkgs.which ];
+    pbdZMQ = [ pkgs.pkg-config ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.which ];
     pcaL1 = [ pkgs.pkg-config pkgs.clp ];
     pdftools = [ pkgs.poppler.dev ];
     PEPBVS = [ pkgs.gsl ];
@@ -533,7 +533,7 @@ let
     V8 = [ pkgs.nodejs.libv8 ];
     XBRL = with pkgs; [ zlib libxml2.dev ];
     XLConnect = [ pkgs.jdk ];
-    xml2 = [ pkgs.libxml2.dev ] ++ lib.optionals stdenv.isDarwin [ pkgs.perl ];
+    xml2 = [ pkgs.libxml2.dev ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.perl ];
     XML = with pkgs; [ libtool libxml2.dev xmlsec libxslt ];
     affyPLM = [ pkgs.zlib.dev ];
     BitSeq = [ pkgs.zlib.dev ];
@@ -607,8 +607,8 @@ let
     unrtf = with pkgs; [ xz.dev bzip2.dev zlib.dev icu.dev libdeflate ];
     nat = [ pkgs.which ];
     nat_templatebrains = [ pkgs.which ];
-    pbdZMQ = [ pkgs.zeromq ] ++ lib.optionals stdenv.isDarwin [ pkgs.darwin.binutils ];
-    bigmemory = lib.optionals stdenv.isLinux [ pkgs.libuuid.dev ];
+    pbdZMQ = [ pkgs.zeromq ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.darwin.binutils ];
+    bigmemory = lib.optionals stdenv.hostPlatform.isLinux [ pkgs.libuuid.dev ];
     bayesWatch = [ pkgs.boost.dev ];
     clustermq = [  pkgs.pkg-config ];
     coga = [ pkgs.gsl.dev ];
@@ -792,7 +792,7 @@ let
     DropletUtils = [ pkgs.zlib.dev ];
     RMariaDB = [ pkgs.libmysqlclient.dev ];
     ijtiff = [ pkgs.libtiff ];
-    ragg = with pkgs; [ freetype.dev libpng.dev libtiff.dev zlib.dev libjpeg.dev bzip2.dev ] ++ lib.optional stdenv.isDarwin lerc.dev;
+    ragg = with pkgs; [ freetype.dev libpng.dev libtiff.dev zlib.dev libjpeg.dev bzip2.dev ] ++ lib.optional stdenv.hostPlatform.isDarwin lerc.dev;
     qqconf = [ pkgs.fftw.dev ];
     spFW = [ pkgs.fftw.dev ];
     qspray = with pkgs; [ gmp.dev mpfr.dev ];
@@ -1220,7 +1220,7 @@ let
 
     ModelMetrics = old.ModelMetrics.overrideAttrs (attrs: {
       env = (attrs.env or { }) // {
-        NIX_CFLAGS_COMPILE = attrs.env.NIX_CFLAGS_COMPILE + lib.optionalString stdenv.isDarwin " -fopenmp";
+        NIX_CFLAGS_COMPILE = attrs.env.NIX_CFLAGS_COMPILE + lib.optionalString stdenv.hostPlatform.isDarwin " -fopenmp";
       };
     });
 
@@ -1275,7 +1275,7 @@ let
     });
 
     pbdZMQ = old.pbdZMQ.overrideAttrs (attrs: {
-      postPatch = lib.optionalString stdenv.isDarwin ''
+      postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
         for file in R/*.{r,r.in}; do
             sed -i 's#system("which \(\w\+\)"[^)]*)#"${pkgs.cctools}/bin/\1"#g' $file
         done
diff --git a/pkgs/development/r-modules/generic-builder.nix b/pkgs/development/r-modules/generic-builder.nix
index ecbd78c4057d..6e3f93f52321 100644
--- a/pkgs/development/r-modules/generic-builder.nix
+++ b/pkgs/development/r-modules/generic-builder.nix
@@ -5,10 +5,10 @@
 stdenv.mkDerivation ({
   buildInputs = buildInputs ++ [R gettext] ++
                 lib.optionals requireX [util-linux xvfb-run] ++
-                lib.optionals stdenv.isDarwin [Cocoa Foundation gfortran libiconv];
+                lib.optionals stdenv.hostPlatform.isDarwin [Cocoa Foundation gfortran libiconv];
 
   env.NIX_CFLAGS_COMPILE =
-    lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+    lib.optionalString stdenv.hostPlatform.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/rocm-modules/5/llvm/base.nix b/pkgs/development/rocm-modules/5/llvm/base.nix
index 914b7d827547..a8147d862e32 100644
--- a/pkgs/development/rocm-modules/5/llvm/base.nix
+++ b/pkgs/development/rocm-modules/5/llvm/base.nix
@@ -54,8 +54,8 @@ in
 
 let
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
   inferNativeTarget = t: if t == "NATIVE" then llvmNativeTarget else t;
   llvmTargetsToBuild' = [ "AMDGPU" ] ++ builtins.map inferNativeTarget llvmTargetsToBuild;
diff --git a/pkgs/development/rocm-modules/5/llvm/stage-1/llvm.nix b/pkgs/development/rocm-modules/5/llvm/stage-1/llvm.nix
index f601e96f0a35..ad4981aa435b 100644
--- a/pkgs/development/rocm-modules/5/llvm/stage-1/llvm.nix
+++ b/pkgs/development/rocm-modules/5/llvm/stage-1/llvm.nix
@@ -6,5 +6,5 @@
 callPackage ../base.nix {
   inherit stdenv rocmUpdateScript;
   requiredSystemFeatures = [ "big-parallel" ];
-  isBroken = stdenv.isAarch64; # https://github.com/ROCm/ROCm/issues/1831#issuecomment-1278205344
+  isBroken = stdenv.hostPlatform.isAarch64; # https://github.com/ROCm/ROCm/issues/1831#issuecomment-1278205344
 }
diff --git a/pkgs/development/rocm-modules/5/rocm-comgr/default.nix b/pkgs/development/rocm-modules/5/rocm-comgr/default.nix
index 1ef226b338c4..ab43edf8a4b9 100644
--- a/pkgs/development/rocm-modules/5/rocm-comgr/default.nix
+++ b/pkgs/development/rocm-modules/5/rocm-comgr/default.nix
@@ -10,8 +10,8 @@
 
 let
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
 in stdenv.mkDerivation (finalAttrs: {
   pname = "rocm-comgr";
diff --git a/pkgs/development/rocm-modules/5/rocm-device-libs/default.nix b/pkgs/development/rocm-modules/5/rocm-device-libs/default.nix
index 28af3e960266..3e769421548b 100644
--- a/pkgs/development/rocm-modules/5/rocm-device-libs/default.nix
+++ b/pkgs/development/rocm-modules/5/rocm-device-libs/default.nix
@@ -9,8 +9,8 @@
 
 let
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
 in stdenv.mkDerivation (finalAttrs: {
   pname = "rocm-device-libs";
diff --git a/pkgs/development/rocm-modules/5/rocminfo/default.nix b/pkgs/development/rocm-modules/5/rocminfo/default.nix
index addbad038b94..fbeb2f7d7f2c 100644
--- a/pkgs/development/rocm-modules/5/rocminfo/default.nix
+++ b/pkgs/development/rocm-modules/5/rocminfo/default.nix
@@ -58,6 +58,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.ncsa;
     maintainers = with maintainers; [ lovesegfault ] ++ teams.rocm.members;
     platforms = platforms.linux;
-    broken = stdenv.isAarch64 || versions.minor finalAttrs.version != versions.minor stdenv.cc.version || versionAtLeast finalAttrs.version "6.0.0";
+    broken = stdenv.hostPlatform.isAarch64 || versions.minor finalAttrs.version != versions.minor stdenv.cc.version || versionAtLeast finalAttrs.version "6.0.0";
   };
 })
diff --git a/pkgs/development/rocm-modules/5/rocmlir/default.nix b/pkgs/development/rocm-modules/5/rocmlir/default.nix
index 73dbbf8f95f8..33d0ddb55604 100644
--- a/pkgs/development/rocm-modules/5/rocmlir/default.nix
+++ b/pkgs/development/rocm-modules/5/rocmlir/default.nix
@@ -27,8 +27,8 @@ let
     else "";
 
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
 in stdenv.mkDerivation (finalAttrs: {
   pname = "rocmlir${suffix}";
diff --git a/pkgs/development/rocm-modules/6/llvm/base.nix b/pkgs/development/rocm-modules/6/llvm/base.nix
index 1bbf16447549..b7a919c792ba 100644
--- a/pkgs/development/rocm-modules/6/llvm/base.nix
+++ b/pkgs/development/rocm-modules/6/llvm/base.nix
@@ -54,8 +54,8 @@ in
 
 let
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
   inferNativeTarget = t: if t == "NATIVE" then llvmNativeTarget else t;
   llvmTargetsToBuild' = [ "AMDGPU" ] ++ builtins.map inferNativeTarget llvmTargetsToBuild;
diff --git a/pkgs/development/rocm-modules/6/llvm/stage-1/llvm.nix b/pkgs/development/rocm-modules/6/llvm/stage-1/llvm.nix
index f601e96f0a35..ad4981aa435b 100644
--- a/pkgs/development/rocm-modules/6/llvm/stage-1/llvm.nix
+++ b/pkgs/development/rocm-modules/6/llvm/stage-1/llvm.nix
@@ -6,5 +6,5 @@
 callPackage ../base.nix {
   inherit stdenv rocmUpdateScript;
   requiredSystemFeatures = [ "big-parallel" ];
-  isBroken = stdenv.isAarch64; # https://github.com/ROCm/ROCm/issues/1831#issuecomment-1278205344
+  isBroken = stdenv.hostPlatform.isAarch64; # https://github.com/ROCm/ROCm/issues/1831#issuecomment-1278205344
 }
diff --git a/pkgs/development/rocm-modules/6/rocm-comgr/default.nix b/pkgs/development/rocm-modules/6/rocm-comgr/default.nix
index c610b63abf68..033de08af11b 100644
--- a/pkgs/development/rocm-modules/6/rocm-comgr/default.nix
+++ b/pkgs/development/rocm-modules/6/rocm-comgr/default.nix
@@ -10,8 +10,8 @@
 
 let
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
 in stdenv.mkDerivation (finalAttrs: {
   pname = "rocm-comgr";
diff --git a/pkgs/development/rocm-modules/6/rocm-device-libs/default.nix b/pkgs/development/rocm-modules/6/rocm-device-libs/default.nix
index defcf2e60ecb..c55ba960fc61 100644
--- a/pkgs/development/rocm-modules/6/rocm-device-libs/default.nix
+++ b/pkgs/development/rocm-modules/6/rocm-device-libs/default.nix
@@ -9,8 +9,8 @@
 
 let
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
 in stdenv.mkDerivation (finalAttrs: {
   pname = "rocm-device-libs";
diff --git a/pkgs/development/rocm-modules/6/rocminfo/default.nix b/pkgs/development/rocm-modules/6/rocminfo/default.nix
index cb1df3f1fd43..f53dcf19b96b 100644
--- a/pkgs/development/rocm-modules/6/rocminfo/default.nix
+++ b/pkgs/development/rocm-modules/6/rocminfo/default.nix
@@ -58,6 +58,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.ncsa;
     maintainers = with maintainers; [ lovesegfault ] ++ teams.rocm.members;
     platforms = platforms.linux;
-    broken = stdenv.isAarch64 || versions.minor finalAttrs.version != versions.minor stdenv.cc.version || versionAtLeast finalAttrs.version "7.0.0";
+    broken = stdenv.hostPlatform.isAarch64 || versions.minor finalAttrs.version != versions.minor stdenv.cc.version || versionAtLeast finalAttrs.version "7.0.0";
   };
 })
diff --git a/pkgs/development/rocm-modules/6/rocmlir/default.nix b/pkgs/development/rocm-modules/6/rocmlir/default.nix
index d8747009a10e..efc33fd8468a 100644
--- a/pkgs/development/rocm-modules/6/rocmlir/default.nix
+++ b/pkgs/development/rocm-modules/6/rocmlir/default.nix
@@ -28,8 +28,8 @@ let
     else "";
 
   llvmNativeTarget =
-    if stdenv.isx86_64 then "X86"
-    else if stdenv.isAarch64 then "AArch64"
+    if stdenv.hostPlatform.isx86_64 then "X86"
+    else if stdenv.hostPlatform.isAarch64 then "AArch64"
     else throw "Unsupported ROCm LLVM platform";
 in stdenv.mkDerivation (finalAttrs: {
   pname = "rocmlir${suffix}";
diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index eb55255191cf..6234fcbccdf1 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -49,7 +49,7 @@ in
   atk = attrs: {
     dependencies = attrs.dependencies ++ [ "gobject-introspection" ];
     nativeBuildInputs = [ rake bundler pkg-config ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     propagatedBuildInputs = [ gobject-introspection wrapGAppsHook3 atk ];
   };
 
@@ -70,13 +70,13 @@ in
 
   cairo = attrs: {
     nativeBuildInputs = [ pkg-config ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     buildInputs = [ gtk2 pcre2 xorg.libpthreadstubs xorg.libXdmcp];
   };
 
   cairo-gobject = attrs: {
     nativeBuildInputs = [ pkg-config ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     buildInputs = [ cairo expat pcre2 xorg.libpthreadstubs xorg.libXdmcp ];
   };
 
@@ -238,13 +238,13 @@ in
 
   gdk_pixbuf2 = attrs: {
     nativeBuildInputs = [ pkg-config bundler rake ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     propagatedBuildInputs = [ gobject-introspection wrapGAppsHook3 gdk-pixbuf ];
   };
 
   gdk3 = attrs: {
     nativeBuildInputs = [ pkg-config bundler rake ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     propagatedBuildInputs = [ gobject-introspection wrapGAppsHook3 gdk-pixbuf cairo ];
   };
 
@@ -256,8 +256,8 @@ in
 
   gio2 = attrs: {
     nativeBuildInputs = [ pkg-config gobject-introspection ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
-    buildInputs = [ gtk2 pcre pcre2 ] ++ lib.optionals stdenv.isLinux [ util-linux libselinux libsepol ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
+    buildInputs = [ gtk2 pcre pcre2 ] ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linux libselinux libsepol ];
   };
 
   gitlab-markup = attrs: { meta.priority = 1; };
@@ -345,16 +345,16 @@ in
 
   glib2 = attrs: {
     nativeBuildInputs = [ pkg-config ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     buildInputs = [ gtk2 pcre2 ];
   };
 
   gtk2 = attrs: {
     nativeBuildInputs = [
       binutils pkg-config
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       util-linux libselinux libsepol
-    ] ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     propagatedBuildInputs = [
       atk
       gdk-pixbuf
@@ -368,18 +368,18 @@ in
       xorg.libpthreadstubs
       xorg.libXdmcp
     ];
-    dontStrip = stdenv.isDarwin;
+    dontStrip = stdenv.hostPlatform.isDarwin;
   };
 
   gtk3 = attrs: {
     nativeBuildInputs = [
       binutils
       pkg-config
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       util-linux
       libselinux
       libsepol
-    ] ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     propagatedBuildInputs = [
       atk
       gdk-pixbuf
@@ -399,12 +399,12 @@ in
       libxkbcommon
       libepoxy
     ];
-    dontStrip = stdenv.isDarwin;
+    dontStrip = stdenv.hostPlatform.isDarwin;
   };
 
   gobject-introspection = attrs: {
     nativeBuildInputs = [ pkg-config pcre2 ]
-      ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     propagatedBuildInputs = [ gobject-introspection wrapGAppsHook3 glib ];
   };
 
@@ -425,8 +425,8 @@ in
 
   grpc = attrs: {
     nativeBuildInputs = [ pkg-config ]
-      ++ lib.optional stdenv.isDarwin cctools
-      ++ lib.optional (lib.versionAtLeast attrs.version "1.53.0" && stdenv.isDarwin && stdenv.isAarch64) autoSignDarwinBinariesHook;
+      ++ lib.optional stdenv.hostPlatform.isDarwin cctools
+      ++ lib.optional (lib.versionAtLeast attrs.version "1.53.0" && stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) autoSignDarwinBinariesHook;
     buildInputs = [ openssl ];
     hardeningDisable = [ "format" ];
     env.NIX_CFLAGS_COMPILE = toString [
@@ -443,7 +443,7 @@ in
     postPatch = ''
       substituteInPlace Makefile \
         --replace '-Wno-invalid-source-encoding' ""
-    '' + lib.optionalString (lib.versionOlder attrs.version "1.53.0" && stdenv.isDarwin) ''
+    '' + lib.optionalString (lib.versionOlder attrs.version "1.53.0" && stdenv.hostPlatform.isDarwin) ''
       # For < v1.48.0
       substituteInPlace src/ruby/ext/grpc/extconf.rb \
         --replace "ENV['AR'] = 'libtool -o' if RUBY_PLATFORM =~ /darwin/" ""
@@ -454,7 +454,7 @@ in
   };
 
   hitimes = attrs: {
-    buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+    buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
   };
 
   hpricot = attrs: {
@@ -467,7 +467,7 @@ in
 
   iconv = attrs: {
     dontBuild = false;
-    buildFlags = lib.optionals stdenv.isDarwin [
+    buildFlags = lib.optionals stdenv.hostPlatform.isDarwin [
       "--with-iconv-dir=${lib.getLib libiconv}"
       "--with-iconv-include=${lib.getDev libiconv}/include"
     ];
@@ -524,7 +524,7 @@ in
     buildFlags = [
       "--with-xml2-lib=${libxml2.out}/lib"
       "--with-xml2-include=${libxml2.dev}/include/libxml2"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "--with-iconv-dir=${lib.getLib libiconv}"
       "--with-opt-include=${lib.getDev libiconv}/include"
     ];
@@ -565,7 +565,7 @@ in
 
     # For some reason 'mathematical.so' is missing cairo, glib, and
     # lasem in its RPATH, add them explicitly here
-    postFixup = lib.optionalString stdenv.isLinux ''
+    postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
       soPath="$out/${ruby.gemPath}/gems/mathematical-${attrs.version}/lib/mathematical/mathematical.so"
       rpath="$(patchelf --print-rpath "$soPath")"
       patchelf --set-rpath "${lib.makeLibraryPath [ lasem glib cairo ]}:$rpath" "$soPath"
@@ -618,11 +618,11 @@ in
       "--with-xslt-include=${libxslt.dev}/include"
       "--with-exslt-lib=${libxslt.out}/lib"
       "--with-exslt-include=${libxslt.dev}/include"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "--with-iconv-dir=${libiconv}"
       "--with-opt-include=${libiconv}/include"
     ];
-  } // lib.optionalAttrs stdenv.isDarwin {
+  } // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     buildInputs = [ libxml2 ];
   });
 
@@ -653,9 +653,9 @@ in
       pcre pcre2
       xorg.libpthreadstubs
       xorg.libXdmcp
-    ] ++ lib.optionals stdenv.isDarwin [ DarwinTools ];
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ DarwinTools ];
     buildInputs = [ libdatrie libthai ]
-      ++ lib.optionals stdenv.isLinux [ libselinux libsepol util-linux ];
+      ++ lib.optionals stdenv.hostPlatform.isLinux [ libselinux libsepol util-linux ];
     propagatedBuildInputs = [ gobject-introspection wrapGAppsHook3 gtk2 ];
   };
 
@@ -791,7 +791,7 @@ in
   };
 
   rugged = attrs: {
-    nativeBuildInputs = [ cmake pkg-config which ] ++ lib.optional stdenv.isDarwin libiconv;
+    nativeBuildInputs = [ cmake pkg-config which ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
     buildInputs = [ openssl libssh2 zlib ];
     dontUseCmakeConfigure = true;
   };
@@ -816,7 +816,7 @@ in
     '';
   };
 
-  scrypt = attrs: lib.optionalAttrs stdenv.isDarwin {
+  scrypt = attrs: lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     dontBuild = false;
     postPatch = ''
       sed -i -e "s/-arch i386//" Rakefile ext/scrypt/Rakefile
@@ -919,6 +919,6 @@ in
   };
 
   zookeeper = attrs: {
-    buildInputs = lib.optionals stdenv.isDarwin [ cctools ];
+    buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
   };
 }
diff --git a/pkgs/development/ruby-modules/gem/default.nix b/pkgs/development/ruby-modules/gem/default.nix
index b2bb43736657..5ed890f8ec48 100644
--- a/pkgs/development/ruby-modules/gem/default.nix
+++ b/pkgs/development/ruby-modules/gem/default.nix
@@ -107,7 +107,7 @@ stdenv.mkDerivation ((builtins.removeAttrs attrs ["source"]) // {
 
   buildInputs = [
     ruby
-  ] ++ lib.optionals stdenv.isDarwin [ libobjc ]
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libobjc ]
     ++ buildInputs;
 
   #name = builtins.trace (attrs.name or "no attr.name" ) "${namePrefix}${gemName}-${version}";
diff --git a/pkgs/development/scheme-modules/scheme-bytestructures/default.nix b/pkgs/development/scheme-modules/scheme-bytestructures/default.nix
index b0ad8d4ec1b0..9ff23f2327eb 100644
--- a/pkgs/development/scheme-modules/scheme-bytestructures/default.nix
+++ b/pkgs/development/scheme-modules/scheme-bytestructures/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   makeFlags = [ "GUILE_AUTO_COMPILE=0" ];
 
   # In procedure bytevector-u8-ref: Argument 2 out of range
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Structured access to bytevector contents";
diff --git a/pkgs/development/skaware-packages/build-skaware-package.nix b/pkgs/development/skaware-packages/build-skaware-package.nix
index 4e912e3af2e8..abad54414566 100644
--- a/pkgs/development/skaware-packages/build-skaware-package.nix
+++ b/pkgs/development/skaware-packages/build-skaware-package.nix
@@ -84,7 +84,7 @@ stdenv.mkDerivation {
     # We assume every nix-based cross target has urandom.
     # This might not hold for e.g. BSD.
     "--with-sysdep-devurandom=yes"
-    (if stdenv.isDarwin
+    (if stdenv.hostPlatform.isDarwin
     then "--disable-shared"
     else "--enable-shared")
   ]
@@ -93,7 +93,7 @@ stdenv.mkDerivation {
     # Explicitly setting target ensures code can be compiled against a skalibs
     # binary built on a different version of darwin.
     # http://www.skarnet.org/cgi-bin/archive.cgi?1:mss:623:heiodchokfjdkonfhdph
-    ++ (lib.optional stdenv.isDarwin
+    ++ (lib.optional stdenv.hostPlatform.isDarwin
     "--build=${stdenv.hostPlatform.system}");
 
   inherit postConfigure;
diff --git a/pkgs/development/skaware-packages/tipidee/default.nix b/pkgs/development/skaware-packages/tipidee/default.nix
index 4df0a2e2a3bb..de3557d58f76 100644
--- a/pkgs/development/skaware-packages/tipidee/default.nix
+++ b/pkgs/development/skaware-packages/tipidee/default.nix
@@ -35,5 +35,5 @@ skawarePackages.buildPackage {
     mv examples $doc/share/doc/tipidee/examples
   '';
 
-  broken = stdenv.isDarwin;
+  broken = stdenv.hostPlatform.isDarwin;
 }
diff --git a/pkgs/development/tools/aapt/default.nix b/pkgs/development/tools/aapt/default.nix
index 4af284948f0b..3bdb1e2f96eb 100644
--- a/pkgs/development/tools/aapt/default.nix
+++ b/pkgs/development/tools/aapt/default.nix
@@ -12,10 +12,10 @@ stdenvNoCC.mkDerivation rec {
   src =
     let
       urlAndHash =
-        if stdenvNoCC.isLinux then {
+        if stdenvNoCC.hostPlatform.isLinux then {
           url = "https://dl.google.com/android/maven2/com/android/tools/build/aapt2/${version}/aapt2-${version}-linux.jar";
           hash = "sha256-eSQaZrRtb5aCG320hrXAL256fxa/oMhBC4hcTA1KRxs=";
-        } else if stdenvNoCC.isDarwin then {
+        } else if stdenvNoCC.hostPlatform.isDarwin then {
           url = "https://dl.google.com/android/maven2/com/android/tools/build/aapt2/${version}/aapt2-${version}-osx.jar";
           hash = "sha256-LUihNjase79JbUkHDb10A5d6pJ+VXDVfv7m09hkL8kY=";
         } else throw "Unsupport platform: ${stdenvNoCC.system}";
@@ -25,8 +25,8 @@ stdenvNoCC.mkDerivation rec {
       stripRoot = false;
     });
 
-  nativeBuildInputs = lib.optionals stdenvNoCC.isLinux [ autoPatchelfHook ];
-  buildInputs = lib.optionals stdenvNoCC.isLinux [ libcxx ];
+  nativeBuildInputs = lib.optionals stdenvNoCC.hostPlatform.isLinux [ autoPatchelfHook ];
+  buildInputs = lib.optionals stdenvNoCC.hostPlatform.isLinux [ libcxx ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/development/tools/amazon-qldb-shell/default.nix b/pkgs/development/tools/amazon-qldb-shell/default.nix
index 2aa7ba99479d..308552b99e2b 100644
--- a/pkgs/development/tools/amazon-qldb-shell/default.nix
+++ b/pkgs/development/tools/amazon-qldb-shell/default.nix
@@ -21,7 +21,7 @@ let
     };
 
     nativeBuildInputs = [ cmake rustPlatform.bindgenHook ];
-    buildInputs = lib.optional stdenv.isDarwin Security;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
     cargoLock = {
       lockFile = ./Cargo.lock;
diff --git a/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix b/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix
index 03f2e36eea9d..f426f0f35dcd 100644
--- a/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix
+++ b/pkgs/development/tools/analysis/cargo-tarpaulin/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ curl Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ curl Security ];
 
   doCheck = false;
 
diff --git a/pkgs/development/tools/analysis/dotenv-linter/default.nix b/pkgs/development/tools/analysis/dotenv-linter/default.nix
index 603cc1d1ccbb..c61f862f5178 100644
--- a/pkgs/development/tools/analysis/dotenv-linter/default.nix
+++ b/pkgs/development/tools/analysis/dotenv-linter/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-4r4NTq2rLnpmm/nwxJ9RoN2+JrUI6XKGfYFI78NY710=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Lightning-fast linter for .env files. Written in Rust";
diff --git a/pkgs/development/tools/analysis/eresi/default.nix b/pkgs/development/tools/analysis/eresi/default.nix
index 1b3cf0936502..192d85c5a2e9 100644
--- a/pkgs/development/tools/analysis/eresi/default.nix
+++ b/pkgs/development/tools/analysis/eresi/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags = [
-    (if stdenv.is64bit then "--enable-32-64" else "--enable-32")
+    (if stdenv.hostPlatform.is64bit then "--enable-32-64" else "--enable-32")
     "--enable-readline"
   ];
 
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
   enableParallelInstalling = false;
 
   installTargets = lib.singleton "install"
-                ++ lib.optional stdenv.is64bit "install64";
+                ++ lib.optional stdenv.hostPlatform.is64bit "install64";
 
   meta = {
     description = "ERESI Reverse Engineering Software Interface";
diff --git a/pkgs/development/tools/analysis/flow/default.nix b/pkgs/development/tools/analysis/flow/default.nix
index 956e460deca3..2bb80f22ecc4 100644
--- a/pkgs/development/tools/analysis/flow/default.nix
+++ b/pkgs/development/tools/analysis/flow/default.nix
@@ -26,8 +26,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = with ocamlPackages; [ ocaml dune_3 findlib ocamlbuild ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ]
-    ++ (with ocamlPackages; [ core_kernel dtoa fileutils lwt_log lwt_ppx ocaml_lwt ppx_deriving ppx_gen_rec ppx_let sedlex visitors wtf8 ] ++ lib.optionals stdenv.isLinux [ inotify ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ]
+    ++ (with ocamlPackages; [ core_kernel dtoa fileutils lwt_log lwt_ppx ocaml_lwt ppx_deriving ppx_gen_rec ppx_let sedlex visitors wtf8 ] ++ lib.optionals stdenv.hostPlatform.isLinux [ inotify ]);
 
   meta = with lib; {
     description = "Static type checker for JavaScript";
diff --git a/pkgs/development/tools/analysis/lcov/default.nix b/pkgs/development/tools/analysis/lcov/default.nix
index 0ed0ef816f09..fcdd944a1ad9 100644
--- a/pkgs/development/tools/analysis/lcov/default.nix
+++ b/pkgs/development/tools/analysis/lcov/default.nix
@@ -17,7 +17,7 @@ let
     perlPackages.GD
     perlPackages.JSONXS
     perlPackages.PathTools
-  ] ++ lib.optionals (!stdenv.isDarwin) [ perlPackages.MemoryProcess ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ perlPackages.MemoryProcess ];
 in
 stdenv.mkDerivation rec {
   pname = "lcov";
diff --git a/pkgs/development/tools/analysis/qcachegrind/default.nix b/pkgs/development/tools/analysis/qcachegrind/default.nix
index 2d7e18d53e4c..9c0be92e2618 100644
--- a/pkgs/development/tools/analysis/qcachegrind/default.nix
+++ b/pkgs/development/tools/analysis/qcachegrind/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
      cp -p converters/op2calltree $out/bin/op2calltree
      cp -p converters/pprof2calltree $out/bin/pprof2calltree
      chmod -R +x $out/bin/
-  '' + (if stdenv.isDarwin then ''
+  '' + (if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
     cp cgview/cgview.app/Contents/MacOS/cgview $out/bin
     cp -a qcachegrind/qcachegrind.app $out/Applications
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Qt GUI to visualize profiling data";
     license = licenses.gpl2Plus;
     platforms = platforms.unix;
diff --git a/pkgs/development/tools/analysis/radare2/default.nix b/pkgs/development/tools/analysis/radare2/default.nix
index 8d75f994aee6..95bcbf055b9a 100644
--- a/pkgs/development/tools/analysis/radare2/default.nix
+++ b/pkgs/development/tools/analysis/radare2/default.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation (finalAttrs: {
     popd
   '';
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath $out/lib $out/lib/libr_io.${finalAttrs.version}.dylib
   '';
 
diff --git a/pkgs/development/tools/analysis/rizin/cutter.nix b/pkgs/development/tools/analysis/rizin/cutter.nix
index 44954c62a3c2..123b58e8a21d 100644
--- a/pkgs/development/tools/analysis/rizin/cutter.nix
+++ b/pkgs/development/tools/analysis/rizin/cutter.nix
@@ -52,7 +52,7 @@ let cutter = stdenv.mkDerivation rec {
     qttools
     qtwebengine
     rizin
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
diff --git a/pkgs/development/tools/analysis/rizin/default.nix b/pkgs/development/tools/analysis/rizin/default.nix
index f83c3dcdcfac..6336d603a61b 100644
--- a/pkgs/development/tools/analysis/rizin/default.nix
+++ b/pkgs/development/tools/analysis/rizin/default.nix
@@ -83,7 +83,7 @@ let rizin = stdenv.mkDerivation rec {
       fi
     done
     export LIBRARY_PATH
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace binrz/rizin/macos_sign.sh \
       --replace 'codesign' '# codesign'
   '';
diff --git a/pkgs/development/tools/analysis/rizin/rz-ghidra.nix b/pkgs/development/tools/analysis/rizin/rz-ghidra.nix
index fcc014f9944d..d9ef68b8620e 100644
--- a/pkgs/development/tools/analysis/rizin/rz-ghidra.nix
+++ b/pkgs/development/tools/analysis/rizin/rz-ghidra.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   meta = with lib; {
     # errors out with undefined symbols from Cutter
-    broken = enableCutterPlugin && stdenv.isDarwin;
+    broken = enableCutterPlugin && stdenv.hostPlatform.isDarwin;
     description = "Deep ghidra decompiler and sleigh disassembler integration for rizin";
     homepage = finalAttrs.src.meta.homepage;
     changelog = "${finalAttrs.src.meta.homepage}/releases/tag/${finalAttrs.src.rev}";
diff --git a/pkgs/development/tools/analysis/splint/default.nix b/pkgs/development/tools/analysis/splint/default.nix
index e22a8b380926..7bff76d87dbd 100644
--- a/pkgs/development/tools/analysis/splint/default.nix
+++ b/pkgs/development/tools/analysis/splint/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "02pv8kscsrkrzip9r08pfs9xs98q74c52mlxzbii6cv6vx1vd3f7";
   };
 
-  patches = [ ./tmpdir.patch ] ++ lib.optional stdenv.isDarwin ./darwin.patch;
+  patches = [ ./tmpdir.patch ] ++ lib.optional stdenv.hostPlatform.isDarwin ./darwin.patch;
 
   buildInputs = [ flex ];
 
diff --git a/pkgs/development/tools/analysis/valgrind/default.nix b/pkgs/development/tools/analysis/valgrind/default.nix
index c54fb7bfeeab..fe44e8b1922f 100644
--- a/pkgs/development/tools/analysis/valgrind/default.nix
+++ b/pkgs/development/tools/analysis/valgrind/default.nix
@@ -49,18 +49,18 @@ stdenv.mkDerivation rec {
 
   # GDB is needed to provide a sane default for `--db-command'.
   # Perl is needed for `callgrind_{annotate,control}'.
-  buildInputs = [ gdb perl ]  ++ lib.optionals (stdenv.isDarwin) [ bootstrap_cmds xnu ];
+  buildInputs = [ gdb perl ]  ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ bootstrap_cmds xnu ];
 
   # Perl is also a native build input.
   nativeBuildInputs = [ autoreconfHook perl ];
 
   enableParallelBuilding = true;
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
-  preConfigure = lib.optionalString stdenv.isFreeBSD ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isFreeBSD ''
     substituteInPlace configure --replace '`uname -r`' \
         ${toString stdenv.hostPlatform.parsed.kernel.version}.0-
-  '' + lib.optionalString stdenv.isDarwin (
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin (
     let OSRELEASE = ''
       $(awk -F '"' '/#define OSRELEASE/{ print $2 }' \
       <${xnu}/Library/Frameworks/Kernel.framework/Headers/libkern/version.h)'';
@@ -133,6 +133,6 @@ stdenv.mkDerivation rec {
       (x86 ++ power ++ s390x ++ armv7 ++ aarch64 ++ mips)
       (darwin ++ freebsd ++ illumos ++ linux);
     badPlatforms = [ lib.systems.inspect.platformPatterns.isStatic ];
-    broken = stdenv.isDarwin; # https://hydra.nixos.org/build/128521440/nixlog/2
+    broken = stdenv.hostPlatform.isDarwin; # https://hydra.nixos.org/build/128521440/nixlog/2
   };
 }
diff --git a/pkgs/development/tools/bacon/default.nix b/pkgs/development/tools/bacon/default.nix
index afaa956bbcab..42eff7fface2 100644
--- a/pkgs/development/tools/bacon/default.nix
+++ b/pkgs/development/tools/bacon/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-YaVnfwf0jyZTe6B35z9Zm9247kGU/G6nu23sHg9lnAk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/development/tools/bin2c/default.nix b/pkgs/development/tools/bin2c/default.nix
index 2528b1ea0961..7ac93c4539b9 100644
--- a/pkgs/development/tools/bin2c/default.nix
+++ b/pkgs/development/tools/bin2c/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
 
   makeFlags = [ "prefix=$(out)" ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   checkTarget = "test";
   checkInputs = [ util-linux ]; # uuidgen
 
diff --git a/pkgs/development/tools/build-managers/bazel/bazel_5/default.nix b/pkgs/development/tools/build-managers/bazel/bazel_5/default.nix
index c2210358344c..da81c1fb4e9b 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_5/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_5/default.nix
@@ -522,7 +522,7 @@ stdenv.mkDerivation rec {
     which
     zip
     python3.pkgs.absl-py   # Needed to build fish completion
-  ] ++ lib.optionals (stdenv.isDarwin) [ cctools libcxx CoreFoundation CoreServices Foundation ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ cctools libcxx CoreFoundation CoreServices Foundation ];
 
   # Bazel makes extensive use of symlinks in the WORKSPACE.
   # This causes problems with infinite symlinks if the build output is in the same location as the
@@ -650,7 +650,7 @@ stdenv.mkDerivation rec {
     # stored non-contiguously in the binary due to gcc optimisations, which leads
     # Nix to miss the hash when scanning for dependencies
     echo "${bazelRC}" >> $out/nix-support/depends
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     echo "${cctools}" >> $out/nix-support/depends
   '';
 
diff --git a/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix b/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix
index a49530ecfc69..b1069673f14a 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_6/default.nix
@@ -583,7 +583,7 @@ stdenv.mkDerivation rec {
     which
     zip
     python3.pkgs.absl-py   # Needed to build fish completion
-  ] ++ lib.optionals (stdenv.isDarwin) [ cctools libcxx sigtool CoreFoundation CoreServices Foundation ];
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [ cctools libcxx sigtool CoreFoundation CoreServices Foundation ];
 
   # Bazel makes extensive use of symlinks in the WORKSPACE.
   # This causes problems with infinite symlinks if the build output is in the same location as the
@@ -622,7 +622,7 @@ stdenv.mkDerivation rec {
   '' +
   # disable execlog parser on darwin, since it fails to build
   # see https://github.com/NixOS/nixpkgs/pull/273774#issuecomment-1865322055
-  lib.optionalString (!stdenv.isDarwin) ''
+  lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # need to change directory for bazel to find the workspace
     cd ./bazel_src
     # build execlog tooling
@@ -649,7 +649,7 @@ stdenv.mkDerivation rec {
   '' +
   # disable execlog parser on darwin, since it fails to build
   # see https://github.com/NixOS/nixpkgs/pull/273774#issuecomment-1865322055
-  (lib.optionalString (!stdenv.isDarwin) ''
+  (lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir $out/share
     cp ./bazel_src/bazel-bin/src/tools/execlog/parser_deploy.jar $out/share/parser_deploy.jar
     cat <<EOF > $out/bin/bazel-execlog
@@ -730,7 +730,7 @@ stdenv.mkDerivation rec {
     # stored non-contiguously in the binary due to gcc optimisations, which leads
     # Nix to miss the hash when scanning for dependencies
     echo "${bazelRC}" >> $out/nix-support/depends
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     echo "${cctools}" >> $out/nix-support/depends
   '';
 
diff --git a/pkgs/development/tools/build-managers/bazel/bazel_7/cpp-test.nix b/pkgs/development/tools/build-managers/bazel/bazel_7/cpp-test.nix
index 5722d26ea1ed..7f98f512c519 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_7/cpp-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_7/cpp-test.nix
@@ -56,7 +56,7 @@ let
     cp ${./cpp-test-MODULE.bazel.lock} $out/MODULE.bazel.lock
     echo > $out/WORSPACE
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/tools
     cp ${toolsBazel} $out/tools/bazel
   ''));
@@ -71,10 +71,10 @@ let
         --verbose_failures \
         --repository_cache=${mergedDistDir} \
         --curses=no \
-    '' + lib.optionalString (stdenv.isDarwin) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
         --cxxopt=-x --cxxopt=c++ \
         --host_cxxopt=-x --host_cxxopt=c++ \
-    '' + lib.optionalString (stdenv.isDarwin && Foundation != null) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isDarwin && Foundation != null) ''
         --linkopt=-Wl,-F${Foundation}/Library/Frameworks \
         --linkopt=-L${darwin.libobjc}/lib \
     '' + ''
diff --git a/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix b/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix
index 1a31de96ca4f..661eb1a71aa9 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_7/default.nix
@@ -419,7 +419,7 @@ stdenv.mkDerivation rec {
     which
     zip
     python3.pkgs.absl-py # Needed to build fish completion
-  ] ++ lib.optionals (stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
     cctools
     libcxx
     Foundation
@@ -561,7 +561,7 @@ stdenv.mkDerivation rec {
     # stored non-contiguously in the binary due to gcc optimisations, which leads
     # Nix to miss the hash when scanning for dependencies
     echo "${bazelRC}" >> $out/nix-support/depends
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     echo "${cctools}" >> $out/nix-support/depends
   '';
 
diff --git a/pkgs/development/tools/build-managers/bazel/bazel_7/java-test.nix b/pkgs/development/tools/build-managers/bazel/bazel_7/java-test.nix
index 51fea3e32dc3..752ddc444855 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_7/java-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_7/java-test.nix
@@ -55,7 +55,7 @@ let
     cp ${./cpp-test-MODULE.bazel} $out/MODULE.bazel
     cp ${./cpp-test-MODULE.bazel.lock} $out/MODULE.bazel.lock
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/tools
     cp ${toolsBazel} $out/tools/bazel
   ''));
diff --git a/pkgs/development/tools/build-managers/bazel/bazel_7/protobuf-test.nix b/pkgs/development/tools/build-managers/bazel/bazel_7/protobuf-test.nix
index ebe4f13346bc..309bae9b2387 100644
--- a/pkgs/development/tools/build-managers/bazel/bazel_7/protobuf-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_7/protobuf-test.nix
@@ -122,7 +122,7 @@ let
     cp ${personProto} $out/person/person.proto
     cp ${personBUILD} $out/person/BUILD.bazel
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     echo 'tools bazel created'
     mkdir $out/tools
     install ${toolsBazel} $out/tools/bazel
@@ -155,7 +155,7 @@ let
         --host_javabase='@local_jdk//:jdk' \
         --java_toolchain='@bazel_tools//tools/jdk:toolchain_hostjdk8' \
         --javabase='@local_jdk//:jdk' \
-    '' + lib.optionalString (stdenv.isDarwin) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
         --cxxopt=-x --cxxopt=c++ --host_cxxopt=-x --host_cxxopt=c++ \
     '' + ''
 
diff --git a/pkgs/development/tools/build-managers/bazel/cpp-test.nix b/pkgs/development/tools/build-managers/bazel/cpp-test.nix
index 6759bf14de10..cc3bc8d9a141 100644
--- a/pkgs/development/tools/build-managers/bazel/cpp-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/cpp-test.nix
@@ -36,7 +36,7 @@ let
     cp -r ${bazel-examples}/cpp-tutorial/stage3 $out
     find $out -type d -exec chmod 755 {} \;
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/tools
     cp ${toolsBazel} $out/tools/bazel
   ''));
@@ -51,10 +51,10 @@ let
         --distdir=${distDir} \
         --curses=no \
         ${extraBazelArgs} \
-    '' + lib.optionalString (stdenv.isDarwin) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
         --cxxopt=-x --cxxopt=c++ --host_cxxopt=-x --host_cxxopt=c++ \
         --linkopt=-stdlib=libc++ --host_linkopt=-stdlib=libc++ \
-    '' + lib.optionalString (stdenv.isDarwin && Foundation != null) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isDarwin && Foundation != null) ''
         --linkopt=-Wl,-F${Foundation}/Library/Frameworks \
         --linkopt=-L${darwin.libobjc}/lib \
     '';
diff --git a/pkgs/development/tools/build-managers/bazel/java-test.nix b/pkgs/development/tools/build-managers/bazel/java-test.nix
index 3890d45d2b94..afdacaf6a844 100644
--- a/pkgs/development/tools/build-managers/bazel/java-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/java-test.nix
@@ -35,7 +35,7 @@ let
     cp -r ${bazel-examples}/java-tutorial $out
     find $out -type d -exec chmod 755 {} \;
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/tools
     cp ${toolsBazel} $out/tools/bazel
   ''));
diff --git a/pkgs/development/tools/build-managers/bazel/protobuf-test.nix b/pkgs/development/tools/build-managers/bazel/protobuf-test.nix
index 0466404ced96..5880c5dd95fe 100644
--- a/pkgs/development/tools/build-managers/bazel/protobuf-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/protobuf-test.nix
@@ -154,7 +154,7 @@ let
     cp ${personProto} $out/person/person.proto
     cp ${personBUILD} $out/person/BUILD.bazel
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/tools
     cp ${toolsBazel} $out/tools/bazel
   ''));
@@ -178,7 +178,7 @@ let
         --host_javabase='@local_jdk//:jdk' \
         --java_toolchain='@bazel_tools//tools/jdk:toolchain_hostjdk8' \
         --javabase='@local_jdk//:jdk' \
-    '' + lib.optionalString (stdenv.isDarwin) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
         --cxxopt=-x --cxxopt=c++ --host_cxxopt=-x --host_cxxopt=c++ \
         --linkopt=-stdlib=libc++ --host_linkopt=-stdlib=libc++ \
     '';
diff --git a/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix b/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix
index e0e59fb8891d..59f5d0c01fcc 100644
--- a/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix
+++ b/pkgs/development/tools/build-managers/bazel/python-bin-path-test.nix
@@ -65,7 +65,7 @@ let
     cp ${pythonBin} $out/python/bin.py
     cp ${pythonBUILD} $out/python/BUILD.bazel
   ''
-  + (lib.optionalString stdenv.isDarwin ''
+  + (lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/tools
     cp ${toolsBazel} $out/tools/bazel
   ''));
diff --git a/pkgs/development/tools/build-managers/bloop/default.nix b/pkgs/development/tools/build-managers/bloop/default.nix
index 01308d89050c..b0d9c72ad224 100644
--- a/pkgs/development/tools/build-managers/bloop/default.nix
+++ b/pkgs/development/tools/build-managers/bloop/default.nix
@@ -13,9 +13,9 @@ stdenv.mkDerivation rec {
   version = "2.0.2";
 
   platform =
-    if stdenv.isLinux && stdenv.isx86_64 then "x86_64-pc-linux"
-    else if stdenv.isDarwin && stdenv.isx86_64 then "x86_64-apple-darwin"
-    else if stdenv.isDarwin && stdenv.isAarch64 then "aarch64-apple-darwin"
+    if stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64 then "x86_64-pc-linux"
+    else if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then "x86_64-apple-darwin"
+    else if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 then "aarch64-apple-darwin"
     else throw "unsupported platform";
 
   bloop-bash = fetchurl {
@@ -36,15 +36,15 @@ stdenv.mkDerivation rec {
   bloop-binary = fetchurl rec {
     url = "https://github.com/scalacenter/bloop/releases/download/v${version}/bloop-${platform}";
     sha256 =
-      if stdenv.isLinux && stdenv.isx86_64 then "sha256-xYVfgi3ANjBiuf4/5FDgSYDL/fPsvuJn4jFxAEVYct4="
-      else if stdenv.isDarwin && stdenv.isx86_64 then "sha256-lq0S2AsulcUUYDd3qnWonwd/W0/gb7lJwC+QTYTlTdg="
-      else if stdenv.isDarwin && stdenv.isAarch64 then "sha256-e+9Q7xIEsHloaKOj13vZnGs2vulkOJv7tCOuACobHvk="
+      if stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64 then "sha256-xYVfgi3ANjBiuf4/5FDgSYDL/fPsvuJn4jFxAEVYct4="
+      else if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then "sha256-lq0S2AsulcUUYDd3qnWonwd/W0/gb7lJwC+QTYTlTdg="
+      else if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64 then "sha256-e+9Q7xIEsHloaKOj13vZnGs2vulkOJv7tCOuACobHvk="
       else throw "unsupported platform";
   };
 
   dontUnpack = true;
   nativeBuildInputs = [ installShellFiles makeWrapper ]
-    ++ lib.optional stdenv.isLinux autoPatchelfHook;
+    ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
   buildInputs = [ stdenv.cc.cc.lib zlib ];
   propagatedBuildInputs = [ jre ];
 
diff --git a/pkgs/development/tools/build-managers/buck/default.nix b/pkgs/development/tools/build-managers/buck/default.nix
index f494e4053525..06246f6b081a 100644
--- a/pkgs/development/tools/build-managers/buck/default.nix
+++ b/pkgs/development/tools/build-managers/buck/default.nix
@@ -42,6 +42,6 @@ stdenv.mkDerivation rec {
     license = licenses.asl20;
     platforms = platforms.all;
     # https://github.com/facebook/buck/issues/2666
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/tools/build-managers/build2/bpkg.nix b/pkgs/development/tools/build-managers/build2/bpkg.nix
index e4d212858690..bf9951e7ae17 100644
--- a/pkgs/development/tools/build-managers/build2/bpkg.nix
+++ b/pkgs/development/tools/build-managers/build2/bpkg.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     openssl
   ];
 
-  doCheck = !stdenv.isDarwin; # tests hang
+  doCheck = !stdenv.hostPlatform.isDarwin; # tests hang
 
   # Failing test
   postPatch = ''
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     "config.bin.lib=${build2.configSharedStatic enableShared enableStatic}"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath '${lib.getLib build2}/lib' "''${!outputBin}/bin/bpkg"
   '';
 
diff --git a/pkgs/development/tools/build-managers/build2/default.nix b/pkgs/development/tools/build-managers/build2/default.nix
index c420bd8c7320..c02334c98a51 100644
--- a/pkgs/development/tools/build-managers/build2/default.nix
+++ b/pkgs/development/tools/build-managers/build2/default.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
     "config.build2.libpkgconf=true"
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath "''${!outputLib}/lib" "''${!outputBin}/bin/b"
   '';
 
diff --git a/pkgs/development/tools/build-managers/conan/default.nix b/pkgs/development/tools/build-managers/conan/default.nix
index 5e7a0e866cff..f9bb2457a4fa 100644
--- a/pkgs/development/tools/build-managers/conan/default.nix
+++ b/pkgs/development/tools/build-managers/conan/default.nix
@@ -39,7 +39,7 @@ python3.pkgs.buildPythonApplication rec {
     requests
     tqdm
     urllib3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     idna
     cryptography
     pyopenssl
@@ -49,7 +49,7 @@ python3.pkgs.buildPythonApplication rec {
     git
     pkg-config
     zlib
-  ] ++ lib.optionals (stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
     xcbuild.xcrun
   ] ++ (with python3.pkgs; [
     mock
@@ -73,7 +73,7 @@ python3.pkgs.buildPythonApplication rec {
   disabledTests = [
     # Tests require network access
     "TestFTP"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Rejects paths containing nix
     "test_conditional_os"
     # Requires Apple Clang
diff --git a/pkgs/development/tools/build-managers/corrosion/default.nix b/pkgs/development/tools/build-managers/corrosion/default.nix
index 6809ee7ffd7a..500e56e9cfcc 100644
--- a/pkgs/development/tools/build-managers/corrosion/default.nix
+++ b/pkgs/development/tools/build-managers/corrosion/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-vaNXXXaGqYNmhonU+ANN857LAUgwv+PMcON+nBuUoeo=";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/development/tools/build-managers/fac/default.nix b/pkgs/development/tools/build-managers/fac/default.nix
index b44cefe6a953..63d53e123aad 100644
--- a/pkgs/development/tools/build-managers/fac/default.nix
+++ b/pkgs/development/tools/build-managers/fac/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
   };
 
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
   cargoHash = "sha256-XT4FQVE+buORuZAFZK5Qnf/Fl3QSvw4SHUuCzWhxUdk=";
 
   # fac includes a unit test called ls_files_works which assumes it's
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
   '';
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = ''
       A build system that uses ptrace to handle dependencies automatically
     '';
diff --git a/pkgs/development/tools/build-managers/gn/generic.nix b/pkgs/development/tools/build-managers/gn/generic.nix
index fe74486ccfaa..71242ceaba84 100644
--- a/pkgs/development/tools/build-managers/gn/generic.nix
+++ b/pkgs/development/tools/build-managers/gn/generic.nix
@@ -28,7 +28,7 @@ in stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ ninja python3 ];
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin; with apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin; with apple_sdk.frameworks; [
     libobjc
     cctools
 
diff --git a/pkgs/development/tools/build-managers/gnumake/4.2/default.nix b/pkgs/development/tools/build-managers/gnumake/4.2/default.nix
index ac22eee7e206..1afadceb9b77 100644
--- a/pkgs/development/tools/build-managers/gnumake/4.2/default.nix
+++ b/pkgs/development/tools/build-managers/gnumake/4.2/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
     # a second. So, tell Make to ignore nanoseconds in mtime here by
     # overriding the autoconf test for the struct.
     # See https://github.com/NixOS/nixpkgs/issues/51221 for discussion.
-    ++ lib.optional stdenv.isDarwin "ac_cv_struct_st_mtim_nsec=no";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "ac_cv_struct_st_mtim_nsec=no";
 
   outputs = [ "out" "man" "info" ];
 
diff --git a/pkgs/development/tools/build-managers/gnumake/default.nix b/pkgs/development/tools/build-managers/gnumake/default.nix
index fcbb23a7119e..5f215be7386a 100644
--- a/pkgs/development/tools/build-managers/gnumake/default.nix
+++ b/pkgs/development/tools/build-managers/gnumake/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     # a second. So, tell Make to ignore nanoseconds in mtime here by
     # overriding the autoconf test for the struct.
     # See https://github.com/NixOS/nixpkgs/issues/51221 for discussion.
-    ++ lib.optional stdenv.isDarwin "ac_cv_struct_st_mtim_nsec=no";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "ac_cv_struct_st_mtim_nsec=no";
 
   outputs = [ "out" "man" "info" ];
   separateDebugInfo = true;
diff --git a/pkgs/development/tools/build-managers/gradle/default.nix b/pkgs/development/tools/build-managers/gradle/default.nix
index a9827e7a0a7e..61510384e31e 100644
--- a/pkgs/development/tools/build-managers/gradle/default.nix
+++ b/pkgs/development/tools/build-managers/gradle/default.nix
@@ -61,7 +61,7 @@ rec {
       nativeBuildInputs = [
         makeWrapper
         unzip
-      ] ++ lib.optionals stdenv.isLinux [
+      ] ++ lib.optionals stdenv.hostPlatform.isLinux [
         autoPatchelfHook
       ];
 
@@ -98,9 +98,9 @@ rec {
             --add-flags "-classpath $gradle_launcher_jar org.gradle.launcher.GradleMain${toolchain.property}"
         '';
 
-      dontFixup = !stdenv.isLinux;
+      dontFixup = !stdenv.hostPlatform.isLinux;
 
-      fixupPhase = let arch = if stdenv.is64bit then "amd64" else "i386";
+      fixupPhase = let arch = if stdenv.hostPlatform.is64bit then "amd64" else "i386";
       in ''
         . ${./patching.sh}
 
diff --git a/pkgs/development/tools/build-managers/gradle/fetch-deps.nix b/pkgs/development/tools/build-managers/gradle/fetch-deps.nix
index 304898c0131c..a0d3b10ba863 100644
--- a/pkgs/development/tools/build-managers/gradle/fetch-deps.nix
+++ b/pkgs/development/tools/build-managers/gradle/fetch-deps.nix
@@ -22,7 +22,7 @@ in
 , data
 # redirect stdout to stderr to allow the update script to be used with update script combinators
 , silent ? true
-, useBwrap ? stdenv.isLinux
+, useBwrap ? stdenv.hostPlatform.isLinux
 } @ attrs:
 
 let
diff --git a/pkgs/development/tools/build-managers/moon/default.nix b/pkgs/development/tools/build-managers/moon/default.nix
index adb3c306a779..f576caef09df 100644
--- a/pkgs/development/tools/build-managers/moon/default.nix
+++ b/pkgs/development/tools/build-managers/moon/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   buildInputs = [ openssl ] ++
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/build-managers/msbuild/default.nix b/pkgs/development/tools/build-managers/msbuild/default.nix
index 94469669a59e..8710ea93c0a9 100644
--- a/pkgs/development/tools/build-managers/msbuild/default.nix
+++ b/pkgs/development/tools/build-managers/msbuild/default.nix
@@ -45,7 +45,7 @@ mkPackage rec {
 
   # https://github.com/NixOS/nixpkgs/issues/38991
   # bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
-  LOCALE_ARCHIVE = lib.optionalString stdenv.isLinux
+  LOCALE_ARCHIVE = lib.optionalString stdenv.hostPlatform.isLinux
       "${glibcLocales}/lib/locale/locale-archive";
 
   postPatch = ''
diff --git a/pkgs/development/tools/build-managers/sbt/default.nix b/pkgs/development/tools/build-managers/sbt/default.nix
index 3977d5b18441..9c03f03be775 100644
--- a/pkgs/development/tools/build-managers/sbt/default.nix
+++ b/pkgs/development/tools/build-managers/sbt/default.nix
@@ -20,9 +20,9 @@ stdenv.mkDerivation (finalAttrs: {
     echo -java-home ${jre.home} >>conf/sbtopts
   '';
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     stdenv.cc.cc # libstdc++.so.6
     zlib
   ];
@@ -39,7 +39,7 @@ stdenv.mkDerivation (finalAttrs: {
     cp -ra . $out/share/sbt
     ln -sT ../share/sbt/bin/sbt $out/bin/sbt
     ln -sT ../share/sbt/bin/sbtn-${
-      if (stdenv.isDarwin) then "universal-apple-darwin"
+      if (stdenv.hostPlatform.isDarwin) then "universal-apple-darwin"
       else if (stdenv.hostPlatform.isAarch64) then "aarch64-pc-linux"
       else "x86_64-pc-linux"
     } $out/bin/sbtn
diff --git a/pkgs/development/tools/build-managers/scala-cli/default.nix b/pkgs/development/tools/build-managers/scala-cli/default.nix
index 5e2058899393..3a0eb79b2430 100644
--- a/pkgs/development/tools/build-managers/scala-cli/default.nix
+++ b/pkgs/development/tools/build-managers/scala-cli/default.nix
@@ -22,7 +22,7 @@ in
 stdenv.mkDerivation {
   inherit pname version;
   nativeBuildInputs = [ installShellFiles makeWrapper ]
-    ++ lib.optional stdenv.isLinux autoPatchelfHook;
+    ++ lib.optional stdenv.hostPlatform.isLinux autoPatchelfHook;
   buildInputs =
     assert lib.assertMsg (lib.versionAtLeast jre.version "17.0.0") ''
       scala-cli requires Java 17 or newer, but ${jre.name} is ${jre.version}
@@ -54,7 +54,7 @@ stdenv.mkDerivation {
   # We need to call autopatchelf before generating completions
   dontAutoPatchelf = true;
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     autoPatchelf $out
   '' + ''
     # hack to ensure the completion function looks right
diff --git a/pkgs/development/tools/buildah/default.nix b/pkgs/development/tools/buildah/default.nix
index c242ab3b4ff3..fc9660eab411 100644
--- a/pkgs/development/tools/buildah/default.nix
+++ b/pkgs/development/tools/buildah/default.nix
@@ -36,7 +36,7 @@ buildGoModule rec {
 
   buildInputs = [
     gpgme
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     btrfs-progs
     libapparmor
     libseccomp
diff --git a/pkgs/development/tools/buildah/wrapper.nix b/pkgs/development/tools/buildah/wrapper.nix
index 60670791827d..1b27c4899715 100644
--- a/pkgs/development/tools/buildah/wrapper.nix
+++ b/pkgs/development/tools/buildah/wrapper.nix
@@ -19,7 +19,7 @@
 
 let
   binPath = lib.makeBinPath ([
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     runc
     crun
     conmon
@@ -34,7 +34,7 @@ let
 
     # this only works for some binaries, others may need to be added to `binPath` or in the modules
     paths = [
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       aardvark-dns
       netavark
       passt
diff --git a/pkgs/development/tools/buildkit/default.nix b/pkgs/development/tools/buildkit/default.nix
index bddb8432109d..355233493c66 100644
--- a/pkgs/development/tools/buildkit/default.nix
+++ b/pkgs/development/tools/buildkit/default.nix
@@ -13,7 +13,7 @@ buildGoModule rec {
 
   vendorHash = null;
 
-  subPackages = [ "cmd/buildctl" ] ++ lib.optionals stdenv.isLinux [ "cmd/buildkitd" ];
+  subPackages = [ "cmd/buildctl" ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "cmd/buildkitd" ];
 
   ldflags = [ "-s" "-w" "-X github.com/moby/buildkit/version.Version=${version}" "-X github.com/moby/buildkit/version.Revision=${src.rev}" ];
 
diff --git a/pkgs/development/tools/chit/default.nix b/pkgs/development/tools/chit/default.nix
index 03c301f19362..7d140bf2a794 100644
--- a/pkgs/development/tools/chit/default.nix
+++ b/pkgs/development/tools/chit/default.nix
@@ -22,11 +22,11 @@ rustPlatform.buildRustPackage rec {
     lockFile = ./Cargo.lock;
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/cocogitto/default.nix b/pkgs/development/tools/cocogitto/default.nix
index 6760b4754203..848b6fb2f10d 100644
--- a/pkgs/development/tools/cocogitto/default.nix
+++ b/pkgs/development/tools/cocogitto/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = [ libgit2 ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ libgit2 ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd cog \
diff --git a/pkgs/development/tools/comby/default.nix b/pkgs/development/tools/comby/default.nix
index ad7ab8559688..4299c122109a 100644
--- a/pkgs/development/tools/comby/default.nix
+++ b/pkgs/development/tools/comby/default.nix
@@ -92,7 +92,7 @@ mkCombyPackage {
     ocamlPackages.dune-configurator
     combyKernel
     combySemantic
-  ] ++ (if !stdenv.isAarch32 && !stdenv.isAarch64 then
+  ] ++ (if !stdenv.hostPlatform.isAarch32 && !stdenv.hostPlatform.isAarch64 then
     [ ocamlPackages.hack_parallel ]
   else
     [ ]);
diff --git a/pkgs/development/tools/confluent-cli/default.nix b/pkgs/development/tools/confluent-cli/default.nix
index e614fe7d947d..09ca1e7ff8f1 100644
--- a/pkgs/development/tools/confluent-cli/default.nix
+++ b/pkgs/development/tools/confluent-cli/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   installPhase = ''
     mkdir -p $out/{bin,share/doc/confluent-cli}
diff --git a/pkgs/development/tools/continuous-integration/buildbot/master.nix b/pkgs/development/tools/continuous-integration/buildbot/master.nix
index d0a2efb32b57..a9e3b01e07e6 100644
--- a/pkgs/development/tools/continuous-integration/buildbot/master.nix
+++ b/pkgs/development/tools/continuous-integration/buildbot/master.nix
@@ -147,7 +147,7 @@ buildPythonApplication rec {
   SQLALCHEMY_SILENCE_UBER_WARNING = 1;
 
   # TimeoutErrors on slow machines -> aarch64
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   preCheck = ''
     export LC_ALL="en_US.UTF-8"
@@ -162,7 +162,7 @@ buildPythonApplication rec {
   passthru = {
     inherit withPlugins;
     updateScript = ./update.sh;
-  } // lib.optionalAttrs stdenv.isLinux {
+  } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
     tests = {
       inherit (nixosTests) buildbot;
     };
@@ -174,6 +174,6 @@ buildPythonApplication rec {
     changelog = "https://github.com/buildbot/buildbot/releases/tag/v${version}";
     maintainers = teams.buildbot.members;
     license = licenses.gpl2Only;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/tools/continuous-integration/buildbot/worker.nix b/pkgs/development/tools/continuous-integration/buildbot/worker.nix
index aacdf92e30a5..3abc10134322 100644
--- a/pkgs/development/tools/continuous-integration/buildbot/worker.nix
+++ b/pkgs/development/tools/continuous-integration/buildbot/worker.nix
@@ -56,6 +56,6 @@ buildPythonPackage ({
     description = "Buildbot Worker Daemon";
     maintainers = teams.buildbot.members;
     license = licenses.gpl2;
-    broken = stdenv.isDarwin; # https://hydra.nixos.org/build/243534318/nixlog/6
+    broken = stdenv.hostPlatform.isDarwin; # https://hydra.nixos.org/build/243534318/nixlog/6
   };
 })
diff --git a/pkgs/development/tools/continuous-integration/buildkite-test-collector-rust/default.nix b/pkgs/development/tools/continuous-integration/buildkite-test-collector-rust/default.nix
index 28630e43b766..84c62e556858 100644
--- a/pkgs/development/tools/continuous-integration/buildkite-test-collector-rust/default.nix
+++ b/pkgs/development/tools/continuous-integration/buildkite-test-collector-rust/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-PF2TFfzWmHXLgTopzJ04dfnzd3Sc/A6Hduffz2guxmU=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/tools/continuous-integration/hci/default.nix b/pkgs/development/tools/continuous-integration/hci/default.nix
index 4f04e0494f0f..6da44a4786cd 100644
--- a/pkgs/development/tools/continuous-integration/hci/default.nix
+++ b/pkgs/development/tools/continuous-integration/hci/default.nix
@@ -2,7 +2,7 @@
 let
   inherit (haskell.lib.compose) overrideCabal addBuildTools justStaticExecutables appendConfigureFlags;
   inherit (lib) makeBinPath;
-  bundledBins = lib.optional stdenv.isLinux crun;
+  bundledBins = lib.optional stdenv.hostPlatform.isLinux crun;
 
   overrides = old: {
     hercules-ci-agent =
diff --git a/pkgs/development/tools/continuous-integration/hercules-ci-agent/default.nix b/pkgs/development/tools/continuous-integration/hercules-ci-agent/default.nix
index 0da85bae969a..a01febb9113d 100644
--- a/pkgs/development/tools/continuous-integration/hercules-ci-agent/default.nix
+++ b/pkgs/development/tools/continuous-integration/hercules-ci-agent/default.nix
@@ -15,7 +15,7 @@
 let
   inherit (haskell.lib.compose) overrideCabal addBuildTools justStaticExecutables;
   inherit (lib) makeBinPath;
-  bundledBins = [ gnutar gzip git openssh ] ++ lib.optional stdenv.isLinux crun;
+  bundledBins = [ gnutar gzip git openssh ] ++ lib.optional stdenv.hostPlatform.isLinux crun;
 
   pkg =
     # justStaticExecutables is needed due to https://github.com/NixOS/nix/issues/2990
@@ -43,7 +43,7 @@ in pkg.overrideAttrs (finalAttrs: o: {
           package = finalAttrs.finalPackage;
           command = "hercules-ci-agent --help";
         };
-      } // lib.optionalAttrs (stdenv.isLinux) {
+      } // lib.optionalAttrs (stdenv.hostPlatform.isLinux) {
         # Does not test the package, but evaluation of the related NixOS module.
         nixos-simple-config = (nixos {
           boot.loader.grub.enable = false;
diff --git a/pkgs/development/tools/cotton/default.nix b/pkgs/development/tools/cotton/default.nix
index ec39c399bdd5..bc54f3154949 100644
--- a/pkgs/development/tools/cotton/default.nix
+++ b/pkgs/development/tools/cotton/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Package manager for JavaScript projects";
diff --git a/pkgs/development/tools/database/dynein/default.nix b/pkgs/development/tools/database/dynein/default.nix
index 618ca16417db..167374348459 100644
--- a/pkgs/development/tools/database/dynein/default.nix
+++ b/pkgs/development/tools/database/dynein/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   preBuild = ''
     export OPENSSL_DIR=${lib.getDev openssl}
diff --git a/pkgs/development/tools/database/movine/default.nix b/pkgs/development/tools/database/movine/default.nix
index 51a4d8f2943b..41ea6a42a05d 100644
--- a/pkgs/development/tools/database/movine/default.nix
+++ b/pkgs/development/tools/database/movine/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/database/prisma-engines/default.nix b/pkgs/development/tools/database/prisma-engines/default.nix
index 295c791d4f5e..756d5e85ab90 100644
--- a/pkgs/development/tools/database/prisma-engines/default.nix
+++ b/pkgs/development/tools/database/prisma-engines/default.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     protobuf
-  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   # FIXME: Workaround Rust 1.80 support by updating time to 0.3.36
   # https://github.com/prisma/prisma-engines/issues/4989
diff --git a/pkgs/development/tools/database/prqlc/default.nix b/pkgs/development/tools/database/prqlc/default.nix
index 2eac6f4a2073..008eba559b11 100644
--- a/pkgs/development/tools/database/prqlc/default.nix
+++ b/pkgs/development/tools/database/prqlc/default.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
       sqlite
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/development/tools/database/replibyte/default.nix b/pkgs/development/tools/database/replibyte/default.nix
index 4437e4738e16..f04a00e881ca 100644
--- a/pkgs/development/tools/database/replibyte/default.nix
+++ b/pkgs/development/tools/database/replibyte/default.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   cargoBuildFlags = [ "--all-features" ];
 
diff --git a/pkgs/development/tools/database/sqlitebrowser/default.nix b/pkgs/development/tools/database/sqlitebrowser/default.nix
index 6b97b1c373d5..c90bfbd3b37d 100644
--- a/pkgs/development/tools/database/sqlitebrowser/default.nix
+++ b/pkgs/development/tools/database/sqlitebrowser/default.nix
@@ -13,13 +13,13 @@ stdenv.mkDerivation (finalAttrs: {
     sha256 = "sha256-2U0jnL2hmrxynMxEiObl10bKFAFlCrY2hulZ/Ggqimw=";
   };
 
-  patches = lib.optional stdenv.isDarwin ./macos.patch;
+  patches = lib.optional stdenv.hostPlatform.isDarwin ./macos.patch;
 
   # We should be using qscintilla from nixpkgs instead of the vendored version,
   # but qscintilla is currently in a bit of a mess as some consumers expect a
   # -qt4 or -qt5 prefix while others do not.
   # We *really* should get that cleaned up.
-  buildInputs = [ qtbase sqlcipher ] ++ lib.optional stdenv.isDarwin qtmacextras;
+  buildInputs = [ qtbase sqlcipher ] ++ lib.optional stdenv.hostPlatform.isDarwin qtmacextras;
 
   nativeBuildInputs = [ cmake qttools wrapQtAppsHook ];
 
diff --git a/pkgs/development/tools/database/surrealdb-migrations/default.nix b/pkgs/development/tools/database/surrealdb-migrations/default.nix
index a8243353adea..2fb443491650 100644
--- a/pkgs/development/tools/database/surrealdb-migrations/default.nix
+++ b/pkgs/development/tools/database/surrealdb-migrations/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-jj1ytX44XoNKR+TCn/MpWk8CFM/DvHSwyfjVe3ca+AA=";
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
    # Error: No such file or directory (os error 2)
    # failures:
diff --git a/pkgs/development/tools/delve/default.nix b/pkgs/development/tools/delve/default.nix
index 4552539bb76e..cae7c6145cb0 100644
--- a/pkgs/development/tools/delve/default.nix
+++ b/pkgs/development/tools/delve/default.nix
@@ -29,7 +29,7 @@ buildGoModule rec {
   #   even with __darwinAllowLocalNetworking allowed.
   # - CGO_FLAGS warnings break tests' expected stdout/stderr outputs.
   # - DAP test binaries exit prematurely.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postInstall = ''
     # fortify source breaks build since delve compiles with -O0
diff --git a/pkgs/development/tools/devpod/default.nix b/pkgs/development/tools/devpod/default.nix
index 75c1e27c41f3..057c0d1e9df5 100644
--- a/pkgs/development/tools/devpod/default.nix
+++ b/pkgs/development/tools/devpod/default.nix
@@ -122,7 +122,7 @@ rec {
         cp -r ${frontend-build} frontend-build
 
         substituteInPlace tauri.conf.json --replace '"distDir": "../dist",' '"distDir": "frontend-build",'
-      '' + lib.optionalString stdenv.isLinux ''
+      '' + lib.optionalString stdenv.hostPlatform.isLinux ''
         substituteInPlace $cargoDepsCopy/libappindicator-sys-*/src/lib.rs \
           --replace "libayatana-appindicator3.so.1" "${libayatana-appindicator}/lib/libayatana-appindicator3.so.1"
 
@@ -134,20 +134,20 @@ rec {
       nativeBuildInputs = [
         copyDesktopItems
         pkg-config
-      ] ++ lib.optionals stdenv.isLinux [
+      ] ++ lib.optionals stdenv.hostPlatform.isLinux [
         jq
-      ] ++ lib.optionals stdenv.isDarwin [
+      ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
         desktopToDarwinBundle
       ];
 
       buildInputs = [
         libsoup
         openssl
-      ] ++ lib.optionals stdenv.isLinux [
+      ] ++ lib.optionals stdenv.hostPlatform.isLinux [
         gtk3
         libayatana-appindicator
         webkitgtk
-      ] ++ lib.optionals stdenv.isDarwin [
+      ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
         darwin.apple_sdk.frameworks.Carbon
         darwin.apple_sdk.frameworks.Cocoa
         darwin.apple_sdk.frameworks.WebKit
diff --git a/pkgs/development/tools/dive/default.nix b/pkgs/development/tools/dive/default.nix
index a29e3a23a26b..06cb34499a72 100644
--- a/pkgs/development/tools/dive/default.nix
+++ b/pkgs/development/tools/dive/default.nix
@@ -24,7 +24,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ btrfs-progs gpgme lvm2 ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ btrfs-progs gpgme lvm2 ];
 
   patches = [
     # fix scrolling
diff --git a/pkgs/development/tools/documentation/doxygen/default.nix b/pkgs/development/tools/documentation/doxygen/default.nix
index 35fcdc709521..455f18ba0a3d 100644
--- a/pkgs/development/tools/documentation/doxygen/default.nix
+++ b/pkgs/development/tools/documentation/doxygen/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libiconv spdlog sqlite ]
     ++ lib.optionals (qt5 != null) (with qt5; [ qtbase wrapQtAppsHook ])
-    ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   cmakeFlags = [
     "-DICONV_INCLUDE_DIR=${libiconv}/include"
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optional (qt5 != null) "-Dbuild_wizard=YES";
 
   env.NIX_CFLAGS_COMPILE =
-    lib.optionalString stdenv.isDarwin "-mmacosx-version-min=10.9";
+    lib.optionalString stdenv.hostPlatform.isDarwin "-mmacosx-version-min=10.9";
 
   # put examples in an output so people/tools can test against them
   outputs = [ "out" "examples" ];
diff --git a/pkgs/development/tools/dprint/default.nix b/pkgs/development/tools/dprint/default.nix
index fbd8ea370866..d6b1266ab393 100644
--- a/pkgs/development/tools/dprint/default.nix
+++ b/pkgs/development/tools/dprint/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-86ecnwDDVvgXgBBodP2rSZOn+R52Jap8RCKILttGOn8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreFoundation Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation Security ];
 
   # Tests fail because they expect a test WASM plugin. Tests already run for
   # every commit upstream on GitHub Actions
diff --git a/pkgs/development/tools/dump_syms/default.nix b/pkgs/development/tools/dump_syms/default.nix
index 61d323d83274..7f723096a8a7 100644
--- a/pkgs/development/tools/dump_syms/default.nix
+++ b/pkgs/development/tools/dump_syms/default.nix
@@ -37,7 +37,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals (stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/development/tools/earthly/default.nix b/pkgs/development/tools/earthly/default.nix
index 576c3edd405c..e36971390d4f 100644
--- a/pkgs/development/tools/earthly/default.nix
+++ b/pkgs/development/tools/earthly/default.nix
@@ -23,7 +23,7 @@ buildGoModule rec {
     "-X main.DefaultBuildkitdImage=docker.io/earthly/buildkitd:v${version}"
     "-X main.GitSha=v${version}"
     "-X main.DefaultInstallationName=earthly"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-extldflags '-static'"
   ];
 
diff --git a/pkgs/development/tools/electron/binary/generic.nix b/pkgs/development/tools/electron/binary/generic.nix
index 60255d21bcb1..39f1d1011b33 100644
--- a/pkgs/development/tools/electron/binary/generic.nix
+++ b/pkgs/development/tools/electron/binary/generic.nix
@@ -166,5 +166,5 @@ in
   stdenv.mkDerivation (finalAttrs:
     lib.recursiveUpdate
       (common stdenv.hostPlatform)
-      ((if stdenv.isDarwin then darwin else linux) finalAttrs)
+      ((if stdenv.hostPlatform.isDarwin then darwin else linux) finalAttrs)
   )
diff --git a/pkgs/development/tools/electron/chromedriver/generic.nix b/pkgs/development/tools/electron/chromedriver/generic.nix
index edd648713e27..1eb1a8d870b8 100644
--- a/pkgs/development/tools/electron/chromedriver/generic.nix
+++ b/pkgs/development/tools/electron/chromedriver/generic.nix
@@ -92,5 +92,5 @@ let
 in
   stdenv.mkDerivation (
     (common stdenv.hostPlatform) //
-    (if stdenv.isDarwin then darwin else linux)
+    (if stdenv.hostPlatform.isDarwin then darwin else linux)
   )
diff --git a/pkgs/development/tools/espup/default.nix b/pkgs/development/tools/espup/default.nix
index ca650be0e386..336bdcdf5229 100644
--- a/pkgs/development/tools/espup/default.nix
+++ b/pkgs/development/tools/espup/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     xz
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/development/tools/explain/default.nix b/pkgs/development/tools/explain/default.nix
index 66334b12d996..fb25deacb46c 100644
--- a/pkgs/development/tools/explain/default.nix
+++ b/pkgs/development/tools/explain/default.nix
@@ -44,6 +44,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ McSinyx ];
     platforms = platforms.unix;
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/tools/fermyon-spin/default.nix b/pkgs/development/tools/fermyon-spin/default.nix
index 17c525d801a5..aa6b1247b117 100644
--- a/pkgs/development/tools/fermyon-spin/default.nix
+++ b/pkgs/development/tools/fermyon-spin/default.nix
@@ -39,7 +39,7 @@ in stdenv.mkDerivation rec {
 
   sourceRoot = ".";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
   ];
 
diff --git a/pkgs/development/tools/firebase-tools/default.nix b/pkgs/development/tools/firebase-tools/default.nix
index 8222c1df9ea4..ccfb5f6e895f 100644
--- a/pkgs/development/tools/firebase-tools/default.nix
+++ b/pkgs/development/tools/firebase-tools/default.nix
@@ -25,7 +25,7 @@ buildNpmPackage rec {
 
   nativeBuildInputs = [
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     xcbuild
   ];
 
diff --git a/pkgs/development/tools/fnm/default.nix b/pkgs/development/tools/fnm/default.nix
index 9aafdb4e02c1..145da019b6f6 100644
--- a/pkgs/development/tools/fnm/default.nix
+++ b/pkgs/development/tools/fnm/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ DiskArbitration Foundation Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ DiskArbitration Foundation Security ];
 
   cargoHash = "sha256-b15m5DjTDNWJBHOaKSEMwkO/o+0mV+JMBDBurml7xOs=";
 
diff --git a/pkgs/development/tools/functiontrace-server/default.nix b/pkgs/development/tools/functiontrace-server/default.nix
index abacb1d9f9d4..efb5026e069e 100644
--- a/pkgs/development/tools/functiontrace-server/default.nix
+++ b/pkgs/development/tools/functiontrace-server/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-3tLjW7yiS1dNsV81KUZbfN2pvYT9kqiC62nWFid2NH8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin
     [ darwin.apple_sdk.frameworks.CoreFoundation ];
 
   meta = with lib; {
diff --git a/pkgs/development/tools/garble/default.nix b/pkgs/development/tools/garble/default.nix
index 438d83405988..0735e283d6db 100644
--- a/pkgs/development/tools/garble/default.nix
+++ b/pkgs/development/tools/garble/default.nix
@@ -20,7 +20,7 @@ buildGoModule rec {
   # Used for some of the tests.
   nativeCheckInputs = [git];
 
-  preBuild = lib.optionalString (!stdenv.isx86_64) ''
+  preBuild = lib.optionalString (!stdenv.hostPlatform.isx86_64) ''
     # The test assumex amd64 assembly
     rm testdata/script/asm.txtar
   '';
@@ -30,6 +30,6 @@ buildGoModule rec {
     homepage = "https://github.com/burrowers/garble/";
     maintainers = with lib.maintainers; [ davhau ];
     license = lib.licenses.bsd3;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/garble.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/garble.x86_64-darwin
   };
 }
diff --git a/pkgs/development/tools/geckodriver/default.nix b/pkgs/development/tools/geckodriver/default.nix
index f62ab97c1bee..7af8747ef8c4 100644
--- a/pkgs/development/tools/geckodriver/default.nix
+++ b/pkgs/development/tools/geckodriver/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-gopI5iOCSzD23mvOues76WIiBtpNf9A6X9NoOULm6Qo=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   meta = with lib; {
     description = "Proxy for using W3C WebDriver-compatible clients to interact with Gecko-based browsers";
diff --git a/pkgs/development/tools/git-ps-rs/default.nix b/pkgs/development/tools/git-ps-rs/default.nix
index 667cafdf67a5..089c03268931 100644
--- a/pkgs/development/tools/git-ps-rs/default.nix
+++ b/pkgs/development/tools/git-ps-rs/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl dbus ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl dbus ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Tool for working with a stack of patches";
diff --git a/pkgs/development/tools/github-copilot-intellij-agent/default.nix b/pkgs/development/tools/github-copilot-intellij-agent/default.nix
index c919e2de6281..13c28ca5b71a 100644
--- a/pkgs/development/tools/github-copilot-intellij-agent/default.nix
+++ b/pkgs/development/tools/github-copilot-intellij-agent/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
     mkdir -p $out/bin
     unzip -p $src github-copilot-intellij/copilot-agent/bin/copilot-agent-${
-      if stdenv.isDarwin then (if stdenv.isAarch64 then "macos-arm64" else "macos") else "linux"
+      if stdenv.hostPlatform.isDarwin then (if stdenv.hostPlatform.isAarch64 then "macos-arm64" else "macos") else "linux"
     } | install -m755 /dev/stdin $out/bin/copilot-agent
 
     runHook postInstall
diff --git a/pkgs/development/tools/glade/default.nix b/pkgs/development/tools/glade/default.nix
index da706dcdb30a..2658cbe241fe 100644
--- a/pkgs/development/tools/glade/default.nix
+++ b/pkgs/development/tools/glade/default.nix
@@ -9,7 +9,7 @@
 , gtk3
 , glib
 , gjs
-, enableWebkit2gtk ? stdenv.isLinux
+, enableWebkit2gtk ? stdenv.hostPlatform.isLinux
 , webkitgtk_4_1
 , gobject-introspection
 , wrapGAppsHook3
diff --git a/pkgs/development/tools/gllvm/default.nix b/pkgs/development/tools/gllvm/default.nix
index b1350fba7c4e..26b820f26425 100644
--- a/pkgs/development/tools/gllvm/default.nix
+++ b/pkgs/development/tools/gllvm/default.nix
@@ -16,7 +16,7 @@ buildGoModule {
   nativeCheckInputs = with llvmPackages; [
     clang
     llvm
-  ] ++ lib.optionals stdenv.isDarwin [ getconf ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ getconf ];
 
   meta = with lib; {
     homepage = "https://github.com/SRI-CSL/gllvm";
diff --git a/pkgs/development/tools/glslviewer/default.nix b/pkgs/development/tools/glslviewer/default.nix
index 809a674a36a9..0d950d24bf60 100644
--- a/pkgs/development/tools/glslviewer/default.nix
+++ b/pkgs/development/tools/glslviewer/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
       ncurses
       ffmpeg
     ]
-    ++ lib.optional stdenv.isDarwin Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   meta = with lib; {
     description = "Live GLSL coding renderer";
@@ -49,6 +49,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     mainProgram = "glslViewer";
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/tools/gptcommit/default.nix b/pkgs/development/tools/gptcommit/default.nix
index f1bd3376e160..2c97533a2696 100644
--- a/pkgs/development/tools/gptcommit/default.nix
+++ b/pkgs/development/tools/gptcommit/default.nix
@@ -30,8 +30,8 @@ rustPlatform.buildRustPackage {
   # 0.5.6 release has failing tests
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security SystemConfiguration ]
-    ++ lib.optionals stdenv.isLinux [ openssl ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ openssl ];
 
   passthru = {
     updateScript = nix-update-script { };
diff --git a/pkgs/development/tools/graphql-client/default.nix b/pkgs/development/tools/graphql-client/default.nix
index 241e1ef95faa..8fe6ff5bcf08 100644
--- a/pkgs/development/tools/graphql-client/default.nix
+++ b/pkgs/development/tools/graphql-client/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
   ];
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "GraphQL tool for Rust projects";
diff --git a/pkgs/development/tools/hobbes/default.nix b/pkgs/development/tools/hobbes/default.nix
index d4a76bf29183..f6d8c0fb8624 100644
--- a/pkgs/development/tools/hobbes/default.nix
+++ b/pkgs/development/tools/hobbes/default.nix
@@ -58,7 +58,7 @@ llvmPackages.stdenv.mkDerivation {
   checkTarget = "test";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Language and an embedded JIT compiler";
     longDescription = ''
       Hobbes is a a language, embedded compiler, and runtime for efficient
diff --git a/pkgs/development/tools/hors/default.nix b/pkgs/development/tools/hors/default.nix
index 4ecea68c18ec..03f53f1eabaf 100644
--- a/pkgs/development/tools/hors/default.nix
+++ b/pkgs/development/tools/hors/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-1PB/JvgfC6qABI+cIePqtsSlZXPqMGQIay9SCXJkV9o=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # requires network access
   doCheck = false;
diff --git a/pkgs/development/tools/hotdoc/default.nix b/pkgs/development/tools/hotdoc/default.nix
index 11d9cf11b152..8dcee1b730dd 100644
--- a/pkgs/development/tools/hotdoc/default.nix
+++ b/pkgs/development/tools/hotdoc/default.nix
@@ -91,7 +91,7 @@ buildPythonApplication rec {
   disabledTests = [
     # Test does not correctly handle path normalization for test comparison
     "test_cli_overrides"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Test does not correctly handle absolute /home paths on Darwin (even fake ones)
     "test_index"
   ];
diff --git a/pkgs/development/tools/htmlq/default.nix b/pkgs/development/tools/htmlq/default.nix
index 7e55740d03ba..e9767ca60029 100644
--- a/pkgs/development/tools/htmlq/default.nix
+++ b/pkgs/development/tools/htmlq/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-r9EnQQPGpPIcNYb1eqGrMnRdh0snIa5iVsTYTI+YErY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   doCheck = false;
 
diff --git a/pkgs/development/tools/jaq/default.nix b/pkgs/development/tools/jaq/default.nix
index 8304303d301f..4bd2f8cb1a3f 100644
--- a/pkgs/development/tools/jaq/default.nix
+++ b/pkgs/development/tools/jaq/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-7MK0iLBpjvWE7UH5Tb3qIm2XnEVsAvBy34Ed4wHagZQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/java/java-language-server/default.nix b/pkgs/development/tools/java/java-language-server/default.nix
index 723937f8f535..fa6bcbf10f5b 100644
--- a/pkgs/development/tools/java/java-language-server/default.nix
+++ b/pkgs/development/tools/java/java-language-server/default.nix
@@ -5,9 +5,9 @@
 
 let
   platform =
-    if stdenv.isLinux then "linux"
-    else if stdenv.isDarwin then "mac"
-    else if stdenv.isWindows then "windows"
+    if stdenv.hostPlatform.isLinux then "linux"
+    else if stdenv.hostPlatform.isDarwin then "mac"
+    else if stdenv.hostPlatform.isWindows then "windows"
     else throw "unsupported platform";
 in
 maven.buildMavenPackage rec {
@@ -31,7 +31,7 @@ maven.buildMavenPackage rec {
   dontConfigure = true;
   preBuild = ''
     jlink \
-      ${lib.optionalString (!stdenv.isDarwin) "--module-path './jdks/${platform}/jdk-13/jmods'"} \
+      ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "--module-path './jdks/${platform}/jdk-13/jmods'"} \
       --add-modules java.base,java.compiler,java.logging,java.sql,java.xml,jdk.compiler,jdk.jdi,jdk.unsupported,jdk.zipfs \
       --output dist/${platform} \
       --no-header-files \
diff --git a/pkgs/development/tools/java/jprofiler/default.nix b/pkgs/development/tools/java/jprofiler/default.nix
index 7f74d8665a80..400c339475fe 100644
--- a/pkgs/development/tools/java/jprofiler/default.nix
+++ b/pkgs/development/tools/java/jprofiler/default.nix
@@ -26,7 +26,7 @@ let
     maintainers = with maintainers; [ catap ];
   };
 
-  src = if stdenv.isLinux then fetchurl {
+  src = if stdenv.hostPlatform.isLinux then fetchurl {
     url = "https://download-gcdn.ej-technologies.com/jprofiler/jprofiler_linux_${lib.replaceStrings ["."] ["_"]  version}.tar.gz";
     hash = "sha256-orjBSaC7NvKcak+RSEa9V05oL3EZIBnp7TyaX/8XFyg=";
   } else fetchurl {
@@ -99,4 +99,4 @@ let
     meta = meta // { platforms = lib.platforms.darwin; };
   };
 in
-if stdenv.isDarwin then darwin else linux
+if stdenv.hostPlatform.isDarwin then darwin else linux
diff --git a/pkgs/development/tools/jless/default.nix b/pkgs/development/tools/jless/default.nix
index e704ec994eed..0aba5e3f23f1 100644
--- a/pkgs/development/tools/jless/default.nix
+++ b/pkgs/development/tools/jless/default.nix
@@ -13,11 +13,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-sas94liAOSIirIJGdexdApXic2gWIBDT4uJFRM3qMw0=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ python3 ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ python3 ];
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit ]
-    ++ lib.optionals stdenv.isLinux [ libxcb ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libxcb ];
 
   meta = with lib; {
     description = "Command-line pager for JSON data";
diff --git a/pkgs/development/tools/jq/default.nix b/pkgs/development/tools/jq/default.nix
index 8d4ec0d1c5a6..1443ca78371a 100644
--- a/pkgs/development/tools/jq/default.nix
+++ b/pkgs/development/tools/jq/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "doc" "man" "dev" "lib" "out" ];
 
   # https://github.com/jqlang/jq/issues/2871
-  postPatch = lib.optionalString stdenv.isFreeBSD ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isFreeBSD ''
     substituteInPlace Makefile.am --replace-fail "tests/mantest" "" --replace-fail "tests/optionaltest" ""
   '';
 
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
   # Otherwise, configure will detect that they’re in libm, but the build will fail
   # with clang 16+ due to calls to undeclared functions.
   # This is fixed upstream and can be removed once jq is updated (to 1.7 or an unstable release).
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin (toString [
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin (toString [
     "-D_REENTRANT=1"
     "-D_DARWIN_C_SOURCE=1"
   ]);
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     "--mandir=\${man}/share/man"
   ] ++ lib.optional (!onigurumaSupport) "--with-oniguruma=no"
   # jq is linked to libjq:
-  ++ lib.optional (!stdenv.isDarwin) "LDFLAGS=-Wl,-rpath,\\\${libdir}";
+  ++ lib.optional (!stdenv.hostPlatform.isDarwin) "LDFLAGS=-Wl,-rpath,\\\${libdir}";
 
   # Break the dependency cycle: $dev refers to $bin via propagated-build-outputs, and
   # $bin refers to $dev because of https://github.com/jqlang/jq/commit/583e4a27188a2db097dd043dd203b9c106bba100
diff --git a/pkgs/development/tools/kafka-delta-ingest/default.nix b/pkgs/development/tools/kafka-delta-ingest/default.nix
index 8dd3cf1299cb..a5fea071b48e 100644
--- a/pkgs/development/tools/kafka-delta-ingest/default.nix
+++ b/pkgs/development/tools/kafka-delta-ingest/default.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
   doCheck = false;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Highly efficient daemon for streaming data from Kafka into Delta Lake";
     mainProgram = "kafka-delta-ingest";
     homepage = "https://github.com/delta-io/kafka-delta-ingest";
diff --git a/pkgs/development/tools/kdash/default.nix b/pkgs/development/tools/kdash/default.nix
index 13edb7bd1fed..aceddd467b02 100644
--- a/pkgs/development/tools/kdash/default.nix
+++ b/pkgs/development/tools/kdash/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ perl python3 pkg-config ];
 
   buildInputs = [ openssl xorg.xcbutil ]
-    ++ lib.optional stdenv.isDarwin AppKit;
+    ++ lib.optional stdenv.hostPlatform.isDarwin AppKit;
 
   cargoHash = "sha256-jm0UCKDy6TrogMPavB86lvk8yKZXubTGGbApk+oP2RQ=";
 
diff --git a/pkgs/development/tools/kubie/default.nix b/pkgs/development/tools/kubie/default.nix
index 42f19d97e4ff..18b429e2d434 100644
--- a/pkgs/development/tools/kubie/default.nix
+++ b/pkgs/development/tools/kubie/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     installShellCompletion completion/kubie.bash
diff --git a/pkgs/development/tools/language-servers/lua-language-server/default.nix b/pkgs/development/tools/language-servers/lua-language-server/default.nix
index 0bbab7942e8a..d187558a1c10 100644
--- a/pkgs/development/tools/language-servers/lua-language-server/default.nix
+++ b/pkgs/development/tools/language-servers/lua-language-server/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
     makeWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     Foundation
     ditto
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
 
       pushd 3rd/luamake
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # This package uses the program clang for C and C++ files. The language
       # is selected via the command line argument -std, but this do not work
       # in combination with the nixpkgs clang wrapper. Therefor we have to
@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
         -e '/cxx_/s,$cc,clang++,'
     '';
 
-  ninjaFlags = [ "-fcompile/ninja/${if stdenv.isDarwin then "macos" else "linux"}.ninja" ];
+  ninjaFlags = [ "-fcompile/ninja/${if stdenv.hostPlatform.isDarwin then "macos" else "linux"}.ninja" ];
 
   postBuild = ''
     popd
diff --git a/pkgs/development/tools/language-servers/rune-languageserver/default.nix b/pkgs/development/tools/language-servers/rune-languageserver/default.nix
index df2d91fa7e84..41977f89e909 100644
--- a/pkgs/development/tools/language-servers/rune-languageserver/default.nix
+++ b/pkgs/development/tools/language-servers/rune-languageserver/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-GlzT7lN9iCNiPFIjhL/UfqohgtOwDaIeTVEWOyaeicM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/language-servers/vala-language-server/default.nix b/pkgs/development/tools/language-servers/vala-language-server/default.nix
index 0a8b3ef124a5..9faf60024c5d 100644
--- a/pkgs/development/tools/language-servers/vala-language-server/default.nix
+++ b/pkgs/development/tools/language-servers/vala-language-server/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     ninja
     pkg-config
     scdoc
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     # GNOME Builder Plugin
     gnome-builder
   ];
diff --git a/pkgs/development/tools/language-servers/vscode-langservers-extracted/default.nix b/pkgs/development/tools/language-servers/vscode-langservers-extracted/default.nix
index 4b7f571ead57..03dec7c8c2fb 100644
--- a/pkgs/development/tools/language-servers/vscode-langservers-extracted/default.nix
+++ b/pkgs/development/tools/language-servers/vscode-langservers-extracted/default.nix
@@ -23,7 +23,7 @@ buildNpmPackage rec {
   buildPhase =
     let
       extensions =
-        if stdenv.isDarwin
+        if stdenv.hostPlatform.isDarwin
         then "../VSCodium.app/Contents/Resources/app/extensions"
         else "../resources/app/extensions";
     in
diff --git a/pkgs/development/tools/ldid/default.nix b/pkgs/development/tools/ldid/default.nix
index 38b252781c7e..c3a988885cec 100644
--- a/pkgs/development/tools/ldid/default.nix
+++ b/pkgs/development/tools/ldid/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
     libplist
     libxml2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     Security
   ];
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     "-lcrypto"
     "-lplist-2.0"
     "-lxml2"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-framework CoreFoundation"
     "-framework Security"
   ];
diff --git a/pkgs/development/tools/libsigrok/default.nix b/pkgs/development/tools/libsigrok/default.nix
index ca9aee9c4592..c93c27722ec2 100644
--- a/pkgs/development/tools/libsigrok/default.nix
+++ b/pkgs/development/tools/libsigrok/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook doxygen pkg-config python ];
   buildInputs = [
     libzip glib libusb1 libftdi1 check libserialport glibmm hidapi
-  ] ++ lib.optionals stdenv.isLinux [ libieee1284 bluez ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libieee1284 bluez ];
 
   strictDeps = true;
 
diff --git a/pkgs/development/tools/mars-mips/default.nix b/pkgs/development/tools/mars-mips/default.nix
index 66b9684175c3..d5489e7e2537 100644
--- a/pkgs/development/tools/mars-mips/default.nix
+++ b/pkgs/development/tools/mars-mips/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
     copyDesktopItems
     unzip
     imagemagick
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     desktopToDarwinBundle
   ];
 
diff --git a/pkgs/development/tools/minizinc/ide.nix b/pkgs/development/tools/minizinc/ide.nix
index 45fd8da44b5e..46025c0f9bb0 100644
--- a/pkgs/development/tools/minizinc/ide.nix
+++ b/pkgs/development/tools/minizinc/ide.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, qtbase, qmake, qtwebsockets, minizinc, makeWrapper, Cocoa }:
 
 let
-  executableLoc = if stdenv.isDarwin then "$out/Applications/MiniZincIDE.app/Contents/MacOS/MiniZincIDE" else "$out/bin/MiniZincIDE";
+  executableLoc = if stdenv.hostPlatform.isDarwin then "$out/Applications/MiniZincIDE.app/Contents/MacOS/MiniZincIDE" else "$out/bin/MiniZincIDE";
 in
 stdenv.mkDerivation rec {
   pname = "minizinc-ide";
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ qmake makeWrapper ];
-  buildInputs = [ qtbase qtwebsockets ] ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+  buildInputs = [ qtbase qtwebsockets ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   sourceRoot = "${src.name}/MiniZincIDE";
 
diff --git a/pkgs/development/tools/misc/autoconf/2.64.nix b/pkgs/development/tools/misc/autoconf/2.64.nix
index daf026dc3a5b..c505cc694805 100644
--- a/pkgs/development/tools/misc/autoconf/2.64.nix
+++ b/pkgs/development/tools/misc/autoconf/2.64.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   # http://thread.gmane.org/gmane.comp.sysutils.autoconf.bugs/6822 for
   # details.
   # There are many test failures on `i386-pc-solaris2.11'.
-  #doCheck = ((!stdenv.isCygwin) && (!stdenv.isSunOS));
+  #doCheck = ((!stdenv.hostPlatform.isCygwin) && (!stdenv.hostPlatform.isSunOS));
   doCheck = false;
 
   # Don't fixup "#! /bin/sh" in Autoconf, otherwise it will use the
diff --git a/pkgs/development/tools/misc/autoconf/2.69.nix b/pkgs/development/tools/misc/autoconf/2.69.nix
index 870b0ae1d34a..bdd534055a5a 100644
--- a/pkgs/development/tools/misc/autoconf/2.69.nix
+++ b/pkgs/development/tools/misc/autoconf/2.69.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   # http://thread.gmane.org/gmane.comp.sysutils.autoconf.bugs/6822 for
   # details.
   # There are many test failures on `i386-pc-solaris2.11'.
-  #doCheck = ((!stdenv.isCygwin) && (!stdenv.isSunOS));
+  #doCheck = ((!stdenv.hostPlatform.isCygwin) && (!stdenv.hostPlatform.isSunOS));
   doCheck = false;
 
   # Don't fixup "#! /bin/sh" in Autoconf, otherwise it will use the
diff --git a/pkgs/development/tools/misc/autoconf/2.71.nix b/pkgs/development/tools/misc/autoconf/2.71.nix
index 1fcb819bd4b7..bfc24892ecd9 100644
--- a/pkgs/development/tools/misc/autoconf/2.71.nix
+++ b/pkgs/development/tools/misc/autoconf/2.71.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   # http://thread.gmane.org/gmane.comp.sysutils.autoconf.bugs/6822 for
   # details.
   # There are many test failures on `i386-pc-solaris2.11'.
-  doCheck = ((!stdenv.isCygwin) && (!stdenv.isSunOS));
+  doCheck = ((!stdenv.hostPlatform.isCygwin) && (!stdenv.hostPlatform.isSunOS));
 
   # Don't fixup "#! /bin/sh" in Autoconf, otherwise it will use the
   # "fixed" path in generated files!
diff --git a/pkgs/development/tools/misc/autoconf/default.nix b/pkgs/development/tools/misc/autoconf/default.nix
index 8039e36a4f20..9f4ee80d1a76 100644
--- a/pkgs/development/tools/misc/autoconf/default.nix
+++ b/pkgs/development/tools/misc/autoconf/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   # http://thread.gmane.org/gmane.comp.sysutils.autoconf.bugs/6822 for
   # details.
   # There are many test failures on `i386-pc-solaris2.11'.
-  doCheck = ((!stdenv.isCygwin) && (!stdenv.isSunOS));
+  doCheck = ((!stdenv.hostPlatform.isCygwin) && (!stdenv.hostPlatform.isSunOS));
 
   # Don't fixup "#! /bin/sh" in Autoconf, otherwise it will use the
   # "fixed" path in generated files!
diff --git a/pkgs/development/tools/misc/autogen/default.nix b/pkgs/development/tools/misc/autogen/default.nix
index 3cb6760842f5..e43571666719 100644
--- a/pkgs/development/tools/misc/autogen/default.nix
+++ b/pkgs/development/tools/misc/autogen/default.nix
@@ -92,7 +92,7 @@ stdenv.mkDerivation rec {
     #"MAKEINFO=${buildPackages.texinfo}/bin/makeinfo"
   ]
   # See: https://sourceforge.net/p/autogen/bugs/187/
-  ++ lib.optionals stdenv.isDarwin [ "ac_cv_func_utimensat=no" ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ "ac_cv_func_utimensat=no" ];
 
   #doCheck = true; # not reliable
 
diff --git a/pkgs/development/tools/misc/binutils/2.38/libbfd.nix b/pkgs/development/tools/misc/binutils/2.38/libbfd.nix
index 08cf35970a6c..313b610560da 100644
--- a/pkgs/development/tools/misc/binutils/2.38/libbfd.nix
+++ b/pkgs/development/tools/misc/binutils/2.38/libbfd.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
 
   strictDeps = true;
   nativeBuildInputs = [ autoreconfHook bison ];
-  buildInputs = [ libiberty zlib ] ++ lib.optionals stdenv.isDarwin [ libintl ];
+  buildInputs = [ libiberty zlib ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libintl ];
 
   configurePlatforms = [ "build" "host" ];
   configureFlags = [
diff --git a/pkgs/development/tools/misc/blackfire/default.nix b/pkgs/development/tools/misc/blackfire/default.nix
index 2640c67a53f4..e3114ea8bd3d 100644
--- a/pkgs/development/tools/misc/blackfire/default.nix
+++ b/pkgs/development/tools/misc/blackfire/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   src = passthru.sources.${stdenv.hostPlatform.system} or (throw "Unsupported platform for blackfire: ${stdenv.hostPlatform.system}");
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     dpkg
   ];
 
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     runHook preInstall
 
-    if ${ lib.boolToString stdenv.isLinux }
+    if ${ lib.boolToString stdenv.hostPlatform.isLinux }
     then
       dpkg-deb -x $src $out
       mv $out/usr/* $out
diff --git a/pkgs/development/tools/misc/blackfire/php-probe.nix b/pkgs/development/tools/misc/blackfire/php-probe.nix
index 4a292f6079bc..c5b5aae3b96e 100644
--- a/pkgs/development/tools/misc/blackfire/php-probe.nix
+++ b/pkgs/development/tools/misc/blackfire/php-probe.nix
@@ -81,7 +81,7 @@ stdenv.mkDerivation (finalAttrs: {
     inherit system phpMajor;
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
   ];
 
diff --git a/pkgs/development/tools/misc/creduce/default.nix b/pkgs/development/tools/misc/creduce/default.nix
index 7adc78013f47..a8b6acb1e3f9 100644
--- a/pkgs/development/tools/misc/creduce/default.nix
+++ b/pkgs/development/tools/misc/creduce/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   # On Linux, c-reduce's preferred way to reason about
   # the cpu architecture/topology is to use 'lscpu',
   # so let's make sure it knows where to find it:
-  + lib.optionalString stdenv.isLinux ''
+  + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace creduce/creduce_utils.pm --replace \
       lscpu ${util-linux}/bin/lscpu
   '';
diff --git a/pkgs/development/tools/misc/ddd/default.nix b/pkgs/development/tools/misc/ddd/default.nix
index 0321b24de321..71a64d4b90ce 100644
--- a/pkgs/development/tools/misc/ddd/default.nix
+++ b/pkgs/development/tools/misc/ddd/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation (finalAttrs: {
       --replace-fail 'debuggerCommand:' 'debuggerCommand: ${gdb}/bin/gdb'
   '';
 
-  nativeBuildInputs = [ imagemagick ] ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+  nativeBuildInputs = [ imagemagick ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   buildInputs = [
     motif
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   # ioctl is not found without this flag. fixed in next release
   # Upstream issue ref: https://savannah.gnu.org/bugs/index.php?64188
-  env = lib.optionalAttrs stdenv.isDarwin { NIX_CFLAGS_COMPILE = "-DHAVE_SYS_IOCTL_H"; };
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin { NIX_CFLAGS_COMPILE = "-DHAVE_SYS_IOCTL_H"; };
 
   configureFlags = [
     "--enable-builtin-manual"
diff --git a/pkgs/development/tools/misc/dura/default.nix b/pkgs/development/tools/misc/dura/default.nix
index 34b5127e118e..34b966607a74 100644
--- a/pkgs/development/tools/misc/dura/default.nix
+++ b/pkgs/development/tools/misc/dura/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/tools/misc/ezno/default.nix b/pkgs/development/tools/misc/ezno/default.nix
index 559622bf7da2..af035e7565ec 100644
--- a/pkgs/development/tools/misc/ezno/default.nix
+++ b/pkgs/development/tools/misc/ezno/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-noMfKx6BsmWhAVI4r8LlC961Uwogv1JGMYSrNGlLGPQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/development/tools/misc/fswatch/default.nix b/pkgs/development/tools/misc/fswatch/default.nix
index afeac90c58c0..05fbd759ffca 100644
--- a/pkgs/development/tools/misc/fswatch/default.nix
+++ b/pkgs/development/tools/misc/fswatch/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-gVYDvda+6ZJkShJXUxUEVxq4enkRrhdvlTTxYWq4Aho=";
   };
 
-  nativeBuildInputs = [ autoreconfHook makeWrapper ] ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  nativeBuildInputs = [ autoreconfHook makeWrapper ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
   buildInputs = [ gettext libtool texinfo ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/tools/misc/funzzy/default.nix b/pkgs/development/tools/misc/funzzy/default.nix
index c05def18404b..c1f4b642a86f 100644
--- a/pkgs/development/tools/misc/funzzy/default.nix
+++ b/pkgs/development/tools/misc/funzzy/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-eq5d6oHWKip9K+9yszLXW+JHtzYzrThXfqoZGMhnSHk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/development/tools/misc/gdb/default.nix b/pkgs/development/tools/misc/gdb/default.nix
index 5cf686dcfb6b..ac1bd1627d1c 100644
--- a/pkgs/development/tools/misc/gdb/default.nix
+++ b/pkgs/development/tools/misc/gdb/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-OCVOrNRXITS8qcWlqk1MpWTLvTDDadiB9zP7a5AzVPI=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace gdb/darwin-nat.c \
       --replace '#include "bfd/mach-o.h"' '#include "mach-o.h"'
   '' + lib.optionalString stdenv.hostPlatform.isMusl ''
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./debug-info-from-env.patch
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     ./darwin-target-match.patch
   ];
 
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional pythonSupport python3
     ++ lib.optional doCheck dejagnu
     ++ lib.optional enableDebuginfod (elfutils.override { enableDebuginfod = true; })
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   propagatedNativeBuildInputs = [ setupDebugInfoDirs ];
 
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   # darwin build fails with format hardening since v7.12
-  hardeningDisable = lib.optionals stdenv.isDarwin [ "format" ];
+  hardeningDisable = lib.optionals stdenv.hostPlatform.isDarwin [ "format" ];
 
   env.NIX_CFLAGS_COMPILE = "-Wno-format-nonliteral";
 
diff --git a/pkgs/development/tools/misc/hydra-cli/default.nix b/pkgs/development/tools/misc/hydra-cli/default.nix
index 527362114851..42ec5704bae7 100644
--- a/pkgs/development/tools/misc/hydra-cli/default.nix
+++ b/pkgs/development/tools/misc/hydra-cli/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/tools/misc/igprof/default.nix b/pkgs/development/tools/misc/igprof/default.nix
index fc2036ec9bbd..229532c755e1 100644
--- a/pkgs/development/tools/misc/igprof/default.nix
+++ b/pkgs/development/tools/misc/igprof/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   CXXFLAGS = ["-fPIC" "-O2" "-w" "-fpermissive"];
 
   meta = {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     description = "Ignominous Profiler";
 
     longDescription = ''
diff --git a/pkgs/development/tools/misc/linuxkit/default.nix b/pkgs/development/tools/misc/linuxkit/default.nix
index eacb70a5ea8f..f5af6c868c85 100644
--- a/pkgs/development/tools/misc/linuxkit/default.nix
+++ b/pkgs/development/tools/misc/linuxkit/default.nix
@@ -24,8 +24,8 @@ buildGoModule rec {
   #   able to use the Virtualization framework at runtime.
   # - sigtool is allows us to validly sign such executables with a dummy
   #   authority.
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ sigtool ];
-  buildInputs = lib.optionals stdenv.isDarwin [ Cocoa Virtualization ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ sigtool ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa Virtualization ];
 
   ldflags = [
     "-s"
@@ -43,7 +43,7 @@ buildGoModule rec {
   # - Finally, at the start of the fixup phase, the working directory is
   #   $sourceRoot/src/cmd/linuxkit, so it's simpler to use the sign target from
   #   the Makefile in that directory rather than $sourceRoot/Makefile.
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     make sign LOCAL_TARGET=$out/bin/linuxkit
   '';
   passthru.tests.version = testers.testVersion {
diff --git a/pkgs/development/tools/misc/lsof/default.nix b/pkgs/development/tools/misc/lsof/default.nix
index de1decee524f..98f7d239878d 100644
--- a/pkgs/development/tools/misc/lsof/default.nix
+++ b/pkgs/development/tools/misc/lsof/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     # We remove phony 'FRC' target that forces rebuilds:
     #   'version.h: FRC ...' is translated to 'version.h: ...'.
     sed -i lib/dialects/*/Makefile -e 's/version.h:\s*FRC/version.h:/'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's|lcurses|lncurses|g' Configure
   '';
 
diff --git a/pkgs/development/tools/misc/msitools/default.nix b/pkgs/development/tools/misc/msitools/default.nix
index 0d4d5c2c4331..6b190f9c659e 100644
--- a/pkgs/development/tools/misc/msitools/default.nix
+++ b/pkgs/development/tools/misc/msitools/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   ];
 
   # WiX tests fail on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     patchShebangs subprojects/bats-core/{bin,libexec}
diff --git a/pkgs/development/tools/misc/netcoredbg/default.nix b/pkgs/development/tools/misc/netcoredbg/default.nix
index d3c08025108e..3fd8c3eeaa94 100644
--- a/pkgs/development/tools/misc/netcoredbg/default.nix
+++ b/pkgs/development/tools/misc/netcoredbg/default.nix
@@ -62,8 +62,8 @@ stdenv.mkDerivation {
   # include source here so that autoPatchelfHook can do it's job
   src = managed;
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ autoPatchelfHook ];
-  buildInputs = lib.optionals stdenv.isLinux [ stdenv.cc.cc.lib ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ stdenv.cc.cc.lib ];
   installPhase = ''
     mkdir -p $out/share/netcoredbg $out/bin
     cp ${unmanaged}/* $out/share/netcoredbg
diff --git a/pkgs/development/tools/misc/orogene/default.nix b/pkgs/development/tools/misc/orogene/default.nix
index 218fdf706885..0f772eac7dfc 100644
--- a/pkgs/development/tools/misc/orogene/default.nix
+++ b/pkgs/development/tools/misc/orogene/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/development/tools/misc/patchelf/unstable.nix b/pkgs/development/tools/misc/patchelf/unstable.nix
index 951493b84395..646fbb1aff14 100644
--- a/pkgs/development/tools/misc/patchelf/unstable.nix
+++ b/pkgs/development/tools/misc/patchelf/unstable.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru = {
     updateScript = unstableGitUpdater {
diff --git a/pkgs/development/tools/misc/pest-ide-tools/default.nix b/pkgs/development/tools/misc/pest-ide-tools/default.nix
index a962444a6fa5..d71155bd6711 100644
--- a/pkgs/development/tools/misc/pest-ide-tools/default.nix
+++ b/pkgs/development/tools/misc/pest-ide-tools/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/misc/pkg-config/default.nix b/pkgs/development/tools/misc/pkg-config/default.nix
index ae567bb01b73..a04b8874e990 100644
--- a/pkgs/development/tools/misc/pkg-config/default.nix
+++ b/pkgs/development/tools/misc/pkg-config/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   # http://bugs.freedesktop.org/show_bug.cgi?id=4738, migrated to
   # https://gitlab.freedesktop.org/pkg-config/pkg-config/issues/28
   patches = lib.optional (!vanilla) ./requires-private.patch
-    ++ lib.optional stdenv.isCygwin ./2.36.3-not-win32.patch;
+    ++ lib.optional stdenv.hostPlatform.isCygwin ./2.36.3-not-win32.patch;
 
   # These three tests fail due to a (desired) behavior change from our ./requires-private.patch
   postPatch =
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libiconv ];
 
   configureFlags = [ "--with-internal-glib" ]
-    ++ lib.optionals (stdenv.isSunOS) [ "--with-libiconv=gnu" "--with-system-library-path" "--with-system-include-path" "CFLAGS=-DENABLE_NLS" ]
+    ++ lib.optionals (stdenv.hostPlatform.isSunOS) [ "--with-libiconv=gnu" "--with-system-library-path" "--with-system-include-path" "CFLAGS=-DENABLE_NLS" ]
        # Can't run these tests while cross-compiling
     ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform)
        [ "glib_cv_stack_grows=no"
diff --git a/pkgs/development/tools/misc/premake/5.nix b/pkgs/development/tools/misc/premake/5.nix
index 64ee0c37317d..e84d2a57c943 100644
--- a/pkgs/development/tools/misc/premake/5.nix
+++ b/pkgs/development/tools/misc/premake/5.nix
@@ -11,13 +11,13 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-2R5gq4jaQsp8Ny1oGuIYkef0kn2UG9jMf20vq0714oY=";
   };
 
-  buildInputs = [ libuuid ] ++ lib.optionals stdenv.isDarwin [ Foundation readline ];
+  buildInputs = [ libuuid ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation readline ];
 
   patches = [ ./no-curl-ca.patch ];
   postPatch = ''
     substituteInPlace contrib/curl/premake5.lua \
       --replace "ca = nil" "ca = '${cacert}/etc/ssl/certs/ca-bundle.crt'"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace premake5.lua \
       --replace -mmacosx-version-min=10.4 -mmacosx-version-min=10.5 \
       --replace-fail '"-arch arm64"' '""' \
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   '';
 
   buildPhase =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
        make -f Bootstrap.mak osx
     '' else ''
        make -f Bootstrap.mak linux
diff --git a/pkgs/development/tools/misc/pwninit/default.nix b/pkgs/development/tools/misc/pwninit/default.nix
index 341532d00422..d67c7e640611 100644
--- a/pkgs/development/tools/misc/pwninit/default.nix
+++ b/pkgs/development/tools/misc/pwninit/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-tbZS7PdRFvO2ifoHA/w3cSPfqqHrLeLHAg6V8oG9gVE=";
   };
 
-  buildInputs = [ openssl xz ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl xz ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
   nativeBuildInputs = [ pkg-config makeBinaryWrapper ];
   postInstall = ''
     wrapProgram $out/bin/pwninit \
diff --git a/pkgs/development/tools/misc/riff/default.nix b/pkgs/development/tools/misc/riff/default.nix
index d6c7ee8164b9..aa85616720dd 100644
--- a/pkgs/development/tools/misc/riff/default.nix
+++ b/pkgs/development/tools/misc/riff/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/misc/runme/default.nix b/pkgs/development/tools/misc/runme/default.nix
index 8299ceba5395..9f7c7d6415b3 100644
--- a/pkgs/development/tools/misc/runme/default.nix
+++ b/pkgs/development/tools/misc/runme/default.nix
@@ -45,7 +45,7 @@ buildGoModule rec {
   ];
 
   # tests fail to access /etc/bashrc on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     substituteInPlace testdata/{categories/basic,runall/basic,script/basic}.txtar \
diff --git a/pkgs/development/tools/misc/rustywind/default.nix b/pkgs/development/tools/misc/rustywind/default.nix
index 6ffcd67a5557..12d3e2aa7f4c 100644
--- a/pkgs/development/tools/misc/rustywind/default.nix
+++ b/pkgs/development/tools/misc/rustywind/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-yZQSY2zqVpmhMd6+Avg2vBh0WQB2FJ2fiMuy5x9Zl9U=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/misc/samply/default.nix b/pkgs/development/tools/misc/samply/default.nix
index a929d90652a9..98dfbc3aca1e 100644
--- a/pkgs/development/tools/misc/samply/default.nix
+++ b/pkgs/development/tools/misc/samply/default.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
     '';
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/development/tools/misc/sccache/default.nix b/pkgs/development/tools/misc/sccache/default.nix
index a268e1749f0d..fc7e2b485a09 100644
--- a/pkgs/development/tools/misc/sccache/default.nix
+++ b/pkgs/development/tools/misc/sccache/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   ];
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/misc/sipp/default.nix b/pkgs/development/tools/misc/sipp/default.nix
index 414be9560b9a..ae5441edb251 100644
--- a/pkgs/development/tools/misc/sipp/default.nix
+++ b/pkgs/development/tools/misc/sipp/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     "-DUSE_GSL=1"
     "-DUSE_PCAP=1"
     "-DUSE_SSL=1"
-    "-DUSE_SCTP=${if stdenv.isLinux then "1" else "0"}"
+    "-DUSE_SCTP=${if stdenv.hostPlatform.isLinux then "1" else "0"}"
 
     # file RPATH_CHANGE could not write new RPATH
     "-DCMAKE_SKIP_BUILD_RPATH=ON"
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake git ];
   buildInputs = [ ncurses libpcap openssl ]
-    ++ lib.optional (stdenv.isLinux) lksctp-tools;
+    ++ lib.optional (stdenv.hostPlatform.isLinux) lksctp-tools;
 
   meta = with lib; {
     homepage = "http://sipp.sf.net";
diff --git a/pkgs/development/tools/misc/slint-lsp/default.nix b/pkgs/development/tools/misc/slint-lsp/default.nix
index 9fee7cca7f7e..f51b848a621a 100644
--- a/pkgs/development/tools/misc/slint-lsp/default.nix
+++ b/pkgs/development/tools/misc/slint-lsp/default.nix
@@ -21,7 +21,7 @@
 
 let
   rpathLibs = [ fontconfig libGL xorg.libxcb xorg.libX11 xorg.libXcursor xorg.libXrandr xorg.libXi ]
-    ++ lib.optionals stdenv.isLinux [ libxkbcommon wayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libxkbcommon wayland ];
 in
 rustPlatform.buildRustPackage rec {
   pname = "slint-lsp";
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ cmake pkg-config fontconfig ];
   buildInputs = rpathLibs ++ [ xorg.libxcb.dev ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreGraphics
     CoreServices
@@ -46,7 +46,7 @@ rustPlatform.buildRustPackage rec {
     OpenGL
   ];
 
-  postInstall = lib.optionalString stdenv.isLinux  ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux  ''
     patchelf --set-rpath ${lib.makeLibraryPath rpathLibs} $out/bin/slint-lsp
   '';
 
diff --git a/pkgs/development/tools/misc/sqitch/default.nix b/pkgs/development/tools/misc/sqitch/default.nix
index 612ef223e67b..458e3b51d309 100644
--- a/pkgs/development/tools/misc/sqitch/default.nix
+++ b/pkgs/development/tools/misc/sqitch/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation {
   pname = "sqitch";
   version = sqitch.version;
 
-  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = [ makeWrapper ] ++ lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
   src = sqitch;
   dontBuild = true;
@@ -34,7 +34,7 @@ stdenv.mkDerivation {
         ln -s ${sqitch}/$d $out/$d
       fi
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/sqitch
   '';
   dontStrip = true;
diff --git a/pkgs/development/tools/misc/src-cli/default.nix b/pkgs/development/tools/misc/src-cli/default.nix
index 44b8cc62145d..c809b52826ca 100644
--- a/pkgs/development/tools/misc/src-cli/default.nix
+++ b/pkgs/development/tools/misc/src-cli/default.nix
@@ -25,9 +25,9 @@ buildGoModule rec {
     "cmd/src"
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libX11
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
diff --git a/pkgs/development/tools/misc/stlink/default.nix b/pkgs/development/tools/misc/stlink/default.nix
index 16785e4d4b89..c5c54351ac64 100644
--- a/pkgs/development/tools/misc/stlink/default.nix
+++ b/pkgs/development/tools/misc/stlink/default.nix
@@ -11,7 +11,7 @@
 
 let
   # The Darwin build of stlink explicitly refers to static libusb.
-  libusb1' = if stdenv.isDarwin then libusb1.override { withStatic = true; } else libusb1;
+  libusb1' = if stdenv.hostPlatform.isDarwin then libusb1.override { withStatic = true; } else libusb1;
 
 # IMPORTANT: You need permissions to access the stlink usb devices.
 # Add services.udev.packages = [ pkgs.stlink ] to your configuration.nix
diff --git a/pkgs/development/tools/misc/strace-analyzer/default.nix b/pkgs/development/tools/misc/strace-analyzer/default.nix
index 625683196923..ee4242c1ca3d 100644
--- a/pkgs/development/tools/misc/strace-analyzer/default.nix
+++ b/pkgs/development/tools/misc/strace-analyzer/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeCheckInputs = [ strace ];
 
-  checkFlags = lib.optionals stdenv.isAarch64 [
+  checkFlags = lib.optionals stdenv.hostPlatform.isAarch64 [
     # thread 'analysis::tests::analyze_dd' panicked at 'assertion failed: ...'
     "--skip=analysis::tests::analyze_dd"
   ];
diff --git a/pkgs/development/tools/misc/sysbench/default.nix b/pkgs/development/tools/misc/sysbench/default.nix
index fa39c310a269..955a0296b72f 100644
--- a/pkgs/development/tools/misc/sysbench/default.nix
+++ b/pkgs/development/tools/misc/sysbench/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   version = "1.0.20";
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = [ libmysqlclient luajit ] ++ lib.optionals stdenv.isLinux [ libaio ];
+  buildInputs = [ libmysqlclient luajit ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libaio ];
   depsBuildBuild = [ pkg-config ];
 
   src = fetchFromGitHub {
diff --git a/pkgs/development/tools/misc/texinfo/common.nix b/pkgs/development/tools/misc/texinfo/common.nix
index a43eab5f00e5..e630489ffae3 100644
--- a/pkgs/development/tools/misc/texinfo/common.nix
+++ b/pkgs/development/tools/misc/texinfo/common.nix
@@ -86,7 +86,7 @@ stdenv.mkDerivation {
       bash
       libintl
     ]
-    ++ optionals stdenv.isSunOS [
+    ++ optionals stdenv.hostPlatform.isSunOS [
       libiconv
       gawk
     ]
@@ -104,7 +104,7 @@ stdenv.mkDerivation {
     ++ optionals (crossBuildTools && lib.versionAtLeast version "7.1") [
       "texinfo_cv_sys_iconv_converts_euc_cn=yes"
     ]
-    ++ optional stdenv.isSunOS "AWK=${gawk}/bin/awk";
+    ++ optional stdenv.hostPlatform.isSunOS "AWK=${gawk}/bin/awk";
 
   installFlags = [ "TEXMF=$(out)/texmf-dist" ];
   installTargets = [
@@ -114,7 +114,7 @@ stdenv.mkDerivation {
 
   nativeCheckInputs = [ procps ] ++ optionals stdenv.buildPlatform.isFreeBSD [ freebsd.locale ];
 
-  doCheck = interactive && !stdenv.isDarwin && !stdenv.isSunOS; # flaky
+  doCheck = interactive && !stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isSunOS; # flaky
 
   checkFlags = optionals (!stdenv.hostPlatform.isMusl && versionOlder version "7") [
     # Test is known to fail on various locales on texinfo-6.8:
diff --git a/pkgs/development/tools/misc/texlab/default.nix b/pkgs/development/tools/misc/texlab/default.nix
index d691b94c38a3..68e29724eb00 100644
--- a/pkgs/development/tools/misc/texlab/default.nix
+++ b/pkgs/development/tools/misc/texlab/default.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ installShellFiles ]
     ++ lib.optional (!isCross) help2man;
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Security
     CoreServices
diff --git a/pkgs/development/tools/misc/tokei/default.nix b/pkgs/development/tools/misc/tokei/default.nix
index ff3ceafc7f5c..6c6b232e9354 100644
--- a/pkgs/development/tools/misc/tokei/default.nix
+++ b/pkgs/development/tools/misc/tokei/default.nix
@@ -13,11 +13,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-U7Bode8qwDsNf4FVppfEHA9uiOFz74CtKgXG6xyYlT8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv Security
   ];
 
-  checkInputs = lib.optionals stdenv.isDarwin [ zlib ];
+  checkInputs = lib.optionals stdenv.hostPlatform.isDarwin [ zlib ];
 
   # enable all output formats
   buildFeatures = [ "all" ];
diff --git a/pkgs/development/tools/misc/wasmer-pack/default.nix b/pkgs/development/tools/misc/wasmer-pack/default.nix
index 7c1d84de885d..f1216ae12416 100644
--- a/pkgs/development/tools/misc/wasmer-pack/default.nix
+++ b/pkgs/development/tools/misc/wasmer-pack/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-nyhjwEZyT8IEb0pTbou/EtN47gehge3fUCQVPs2TkIY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/misc/xxgdb/default.nix b/pkgs/development/tools/misc/xxgdb/default.nix
index 1c6eca4729a0..5ba3b74a5a3d 100644
--- a/pkgs/development/tools/misc/xxgdb/default.nix
+++ b/pkgs/development/tools/misc/xxgdb/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Simple but powerful graphical interface to gdb";
     mainProgram = "xxgdb";
     license = licenses.mit;
diff --git a/pkgs/development/tools/mysql-shell/8.nix b/pkgs/development/tools/mysql-shell/8.nix
index 2f8983572f29..79ceb8a0aadd 100644
--- a/pkgs/development/tools/mysql-shell/8.nix
+++ b/pkgs/development/tools/mysql-shell/8.nix
@@ -72,8 +72,8 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   nativeBuildInputs = [ pkg-config cmake git bison makeWrapper ]
-    ++ lib.optionals (!stdenv.isDarwin) [ rpcsvc-proto ]
-    ++ lib.optionals stdenv.isDarwin [ cctools DarwinTools ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ rpcsvc-proto ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools DarwinTools ];
 
   buildInputs = [
     curl
@@ -95,8 +95,8 @@ stdenv.mkDerivation (finalAttrs: {
     python3
     antlr.runtime.cpp
   ] ++ pythonDeps
-  ++ lib.optionals stdenv.isLinux [ libtirpc ]
-  ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ libtirpc ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   preConfigure = ''
     # Build MySQL
diff --git a/pkgs/development/tools/mysql-shell/innovation.nix b/pkgs/development/tools/mysql-shell/innovation.nix
index 32fd0746360f..14ff96542c46 100644
--- a/pkgs/development/tools/mysql-shell/innovation.nix
+++ b/pkgs/development/tools/mysql-shell/innovation.nix
@@ -72,8 +72,8 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   nativeBuildInputs = [ pkg-config cmake git bison makeWrapper ]
-    ++ lib.optionals (!stdenv.isDarwin) [ rpcsvc-proto ]
-    ++ lib.optionals stdenv.isDarwin [ cctools DarwinTools ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ rpcsvc-proto ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools DarwinTools ];
 
   buildInputs = [
     curl
@@ -95,8 +95,8 @@ stdenv.mkDerivation (finalAttrs: {
     python3
     antlr.runtime.cpp
   ] ++ pythonDeps
-  ++ lib.optionals stdenv.isLinux [ libtirpc ]
-  ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ libtirpc ]
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   preConfigure = ''
     # Build MySQL
diff --git a/pkgs/development/tools/nest-cli/default.nix b/pkgs/development/tools/nest-cli/default.nix
index 9c5f8a12df5b..c9d422781827 100644
--- a/pkgs/development/tools/nest-cli/default.nix
+++ b/pkgs/development/tools/nest-cli/default.nix
@@ -27,7 +27,7 @@ buildNpmPackage rec {
     python3
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/development/tools/nodehun/default.nix b/pkgs/development/tools/nodehun/default.nix
index 83ba3fe2e494..5bc067085ed8 100644
--- a/pkgs/development/tools/nodehun/default.nix
+++ b/pkgs/development/tools/nodehun/default.nix
@@ -30,9 +30,9 @@ buildNpmPackage {
 
   npmDepsHash = "sha256-mV6rWNf2p2w4H0ESUT0/Ybtx9YEdvO5l2gCvlWFXK+U=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
   nativeBuildInputs = [ node-gyp python3 ]
-    ++ lib.optionals stdenv.isDarwin [ cctools ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
 
   postInstall = ''
     # Only keep the necessary parts of build/Release to reduce closure size
diff --git a/pkgs/development/tools/nsis/default.nix b/pkgs/development/tools/nsis/default.nix
index 32e69dcf7042..1651a3c43d9f 100644
--- a/pkgs/development/tools/nsis/default.nix
+++ b/pkgs/development/tools/nsis/default.nix
@@ -31,16 +31,16 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ scons ];
-  buildInputs = [ zlib ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ zlib ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   CPPPATH = symlinkJoin {
      name = "nsis-includes";
-     paths = [ zlib.dev ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+     paths = [ zlib.dev ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
   };
 
   LIBPATH = symlinkJoin {
     name = "nsis-libs";
-    paths = [ zlib ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    paths = [ zlib ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
   };
 
   sconsFlags = [
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     "SKIPUTILS=all"
     "SKIPMISC=all"
     "NSIS_CONFIG_CONST_DATA=no"
-  ] ++ lib.optional stdenv.isDarwin "APPEND_LINKFLAGS=-liconv";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "APPEND_LINKFLAGS=-liconv";
 
   preBuild = ''
     sconsFlagsArray+=(
@@ -71,6 +71,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = with maintainers; [ pombeirp ];
     mainProgram = "makensis";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/tools/nufmt/default.nix b/pkgs/development/tools/nufmt/default.nix
index 4c9e6ff4af6a..e5e656877ef9 100644
--- a/pkgs/development/tools/nufmt/default.nix
+++ b/pkgs/development/tools/nufmt/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-BwKLl8eMCrqVt9PA5SHAXxu3ypP2ePcSuljKL+wSkvw=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     IOKit
   ]);
 
diff --git a/pkgs/development/tools/ocaml/dune/3.nix b/pkgs/development/tools/ocaml/dune/3.nix
index f2c00e16c9e7..1aa192f1daab 100644
--- a/pkgs/development/tools/ocaml/dune/3.nix
+++ b/pkgs/development/tools/ocaml/dune/3.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ ocaml findlib ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/development/tools/ocaml/opam/default.nix b/pkgs/development/tools/ocaml/opam/default.nix
index ec34ba2f17fc..4e7d0af89ab0 100644
--- a/pkgs/development/tools/ocaml/opam/default.nix
+++ b/pkgs/development/tools/ocaml/opam/default.nix
@@ -17,8 +17,8 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ makeWrapper unzip ocaml curl ];
   buildInputs = [ ncurses getconf ]
-    ++ lib.optionals stdenv.isLinux [ bubblewrap ]
-    ++ lib.optionals stdenv.isDarwin [ Foundation ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ bubblewrap ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   patches = [ ./opam-shebangs.patch ];
 
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
     mv $out/bin/opam $out/bin/.opam-wrapped
     makeWrapper $out/bin/.opam-wrapped $out/bin/opam \
       --argv0 "opam" \
-      --suffix PATH : ${unzip}/bin:${curl}/bin:${lib.optionalString stdenv.isLinux "${bubblewrap}/bin:"}${getconf}/bin \
+      --suffix PATH : ${unzip}/bin:${curl}/bin:${lib.optionalString stdenv.hostPlatform.isLinux "${bubblewrap}/bin:"}${getconf}/bin \
       --set OPAM_USER_PATH_RO /run/current-system/sw/bin:/nix/
     $out/bin/opam-installer --prefix=$installer opam-installer.install
   '';
diff --git a/pkgs/development/tools/open-policy-agent/default.nix b/pkgs/development/tools/open-policy-agent/default.nix
index 891733635cce..4b11dd7576dd 100644
--- a/pkgs/development/tools/open-policy-agent/default.nix
+++ b/pkgs/development/tools/open-policy-agent/default.nix
@@ -8,7 +8,7 @@
 , enableWasmEval ? false
 }:
 
-assert enableWasmEval && stdenv.isDarwin -> builtins.throw "building with wasm on darwin is failing in nixpkgs";
+assert enableWasmEval && stdenv.hostPlatform.isDarwin -> builtins.throw "building with wasm on darwin is failing in nixpkgs";
 
 buildGoModule rec {
   pname = "open-policy-agent";
@@ -55,9 +55,9 @@ buildGoModule rec {
     # want but also limits the tests
     # Also avoid wasm tests on darwin due to wasmtime-go build issues
     getGoDirs() {
-      go list ./... | grep -v -e e2e ${lib.optionalString stdenv.isDarwin "-e wasm"}
+      go list ./... | grep -v -e e2e ${lib.optionalString stdenv.hostPlatform.isDarwin "-e wasm"}
     }
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # remove tests that have "too many open files"/"no space left on device" issues on darwin in hydra
     rm server/server_test.go
   '';
diff --git a/pkgs/development/tools/oxlint/default.nix b/pkgs/development/tools/oxlint/default.nix
index 4625b97eb000..5feddddb90b6 100644
--- a/pkgs/development/tools/oxlint/default.nix
+++ b/pkgs/development/tools/oxlint/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     rust-jemalloc-sys
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/pactorio/default.nix b/pkgs/development/tools/pactorio/default.nix
index e6254bdbbb6f..06b55790ddf6 100644
--- a/pkgs/development/tools/pactorio/default.nix
+++ b/pkgs/development/tools/pactorio/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles pkg-config ];
 
-  buildInputs = [ bzip2 ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ bzip2 ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     installManPage artifacts/pactorio.1
diff --git a/pkgs/development/tools/parsing/antlr/2.7.7.nix b/pkgs/development/tools/parsing/antlr/2.7.7.nix
index a47918f4354b..991925cb4e76 100644
--- a/pkgs/development/tools/parsing/antlr/2.7.7.nix
+++ b/pkgs/development/tools/parsing/antlr/2.7.7.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   patches = [ ./2.7.7-fixes.patch ];
   buildInputs = [ jdk ];
 
-  CXXFLAGS = lib.optionalString stdenv.isDarwin "-D_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION";
+  CXXFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-D_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION";
 
   meta = with lib; {
     description = "Powerful parser generator";
diff --git a/pkgs/development/tools/parsing/antlr/4.nix b/pkgs/development/tools/parsing/antlr/4.nix
index 79db5301add9..f575110b87fd 100644
--- a/pkgs/development/tools/parsing/antlr/4.nix
+++ b/pkgs/development/tools/parsing/antlr/4.nix
@@ -89,7 +89,7 @@ let
 
         nativeBuildInputs = [ cmake ninja pkg-config ];
         buildInputs =
-          lib.optional stdenv.isDarwin CoreFoundation ++
+          lib.optional stdenv.hostPlatform.isDarwin CoreFoundation ++
           extraCppBuildInputs;
 
         cmakeDir = "../runtime/Cpp";
@@ -153,7 +153,7 @@ in {
     version = "4.10.1";
     sourceSha256 = "sha256-Z1P81L0aPbimitzrHH/9rxsMCA6Qn3i42jFbUmVqu1E=";
     jarSha256 = "sha256-QZSdQfINMdW4J3GHc13XVRCN9Ss422yGUQjTOCBA+Rg=";
-    extraCppBuildInputs = lib.optional stdenv.isLinux libuuid;
+    extraCppBuildInputs = lib.optional stdenv.hostPlatform.isLinux libuuid;
     extraCppCmakeFlags = [
       "-DANTLR4_INSTALL=ON"
       "-DANTLR_BUILD_CPP_TESTS=OFF"
@@ -165,7 +165,7 @@ in {
     sourceSha256 = "1af3cfqwk7lq1b5qsh1am0922fyhy7wmlpnrqdnvch3zzza9n1qm";
     jarSha256 = "0dnz2x54kigc58bxnynjhmr5iq49f938vj6p50gdir1xdna41kdg";
     extraCppBuildInputs = [ utf8cpp ]
-      ++ lib.optional stdenv.isLinux libuuid;
+      ++ lib.optional stdenv.hostPlatform.isLinux libuuid;
     extraCppCmakeFlags = [
       "-DCMAKE_CXX_FLAGS='-I${lib.getDev utf8cpp}/include/utf8cpp'"
     ];
@@ -178,7 +178,7 @@ in {
     version = "4.8";
     sourceSha256 = "1qal3add26qxskm85nk7r758arladn5rcyjinmhlhznmpbbv9j8m";
     jarSha256 = "0nms976cnqyr1ndng3haxkmknpdq6xli4cpf4x4al0yr21l9v93k";
-    extraCppBuildInputs = lib.optional stdenv.isLinux libuuid;
+    extraCppBuildInputs = lib.optional stdenv.hostPlatform.isLinux libuuid;
     extraCppCmakeFlags = [ "-DANTLR4_INSTALL=ON" ];
   }).antlr;
 }
diff --git a/pkgs/development/tools/parsing/bison/default.nix b/pkgs/development/tools/parsing/bison/default.nix
index 43ef3ffa3e19..80a2ad835c28 100644
--- a/pkgs/development/tools/parsing/bison/default.nix
+++ b/pkgs/development/tools/parsing/bison/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
   # cannot add bash to buildInputs due to infinite recursion
   strictDeps = stdenv.hostPlatform != stdenv.buildPlatform;
 
-  nativeBuildInputs = [ m4 perl ] ++ lib.optional stdenv.isSunOS help2man;
+  nativeBuildInputs = [ m4 perl ] ++ lib.optional stdenv.hostPlatform.isSunOS help2man;
   propagatedBuildInputs = [ m4 ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/development/tools/parsing/flex/default.nix b/pkgs/development/tools/parsing/flex/default.nix
index bd62241ec98c..84cb5f35d3c6 100644
--- a/pkgs/development/tools/parsing/flex/default.nix
+++ b/pkgs/development/tools/parsing/flex/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     export ac_cv_func_realloc_0_nonnull=yes
   '';
 
-  postConfigure = lib.optionalString (stdenv.isDarwin || stdenv.isCygwin) ''
+  postConfigure = lib.optionalString (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isCygwin) ''
     sed -i Makefile -e 's/-no-undefined//;'
   '';
 
diff --git a/pkgs/development/tools/parsing/jikespg/default.nix b/pkgs/development/tools/parsing/jikespg/default.nix
index 03814d3cfbe7..a6b64efb7fcf 100644
--- a/pkgs/development/tools/parsing/jikespg/default.nix
+++ b/pkgs/development/tools/parsing/jikespg/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   postPatch = ''
-    substituteInPlace Makefile --replace-fail "gcc" "${stdenv.cc.targetPrefix}cc ${lib.optionalString stdenv.isDarwin "-std=c89"}"
+    substituteInPlace Makefile --replace-fail "gcc" "${stdenv.cc.targetPrefix}cc ${lib.optionalString stdenv.hostPlatform.isDarwin "-std=c89"}"
   '';
 
   sourceRoot = "jikespg/src";
diff --git a/pkgs/development/tools/parsing/ragel/default.nix b/pkgs/development/tools/parsing/ragel/default.nix
index 72e77a55a152..a6090f104fa2 100644
--- a/pkgs/development/tools/parsing/ragel/default.nix
+++ b/pkgs/development/tools/parsing/ragel/default.nix
@@ -50,6 +50,6 @@ in
     version = "7.0.0.12";
     sha256 = "0x3si355lv6q051lgpg8bpclpiq5brpri5lv3p8kk2qhzfbyz69r";
     license = lib.licenses.mit;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/development/tools/parsing/tree-sitter/default.nix b/pkgs/development/tools/parsing/tree-sitter/default.nix
index ea3386e15d51..662d6ace13a9 100644
--- a/pkgs/development/tools/parsing/tree-sitter/default.nix
+++ b/pkgs/development/tools/parsing/tree-sitter/default.nix
@@ -114,7 +114,7 @@ rustPlatform.buildRustPackage {
   cargoHash = "sha256-44FIO0kPso6NxjLwmggsheILba3r9GEhDld2ddt601g=";
 
   buildInputs =
-    lib.optionals stdenv.isDarwin [ Security CoreServices ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ Security CoreServices ];
   nativeBuildInputs =
     [ which ]
     ++ lib.optionals webUISupport [ emscripten ];
diff --git a/pkgs/development/tools/perseus-cli/default.nix b/pkgs/development/tools/perseus-cli/default.nix
index cffa0299beab..ba795a6ef870 100644
--- a/pkgs/development/tools/perseus-cli/default.nix
+++ b/pkgs/development/tools/perseus-cli/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-i7MPmO9MoANZLzmR5gsD+v0gyDtFbzhsmE9xOsb88L0=";
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   postInstall = ''
     wrapProgram $out/bin/perseus \
diff --git a/pkgs/development/tools/pgformatter/default.nix b/pkgs/development/tools/pgformatter/default.nix
index d4407fa5ec24..cad3d2af4505 100644
--- a/pkgs/development/tools/pgformatter/default.nix
+++ b/pkgs/development/tools/pgformatter/default.nix
@@ -35,8 +35,8 @@ perlPackages.buildPerlPackage rec {
       --replace "'INSTALLDIRS'  => \$INSTALLDIRS," "'INSTALLDIRS'  => \$INSTALLDIRS, 'INSTALLVENDORLIB' => 'bin/lib', 'INSTALLVENDORBIN' => 'bin', 'INSTALLVENDORSCRIPT' => 'bin', 'INSTALLVENDORMAN1DIR' => 'share/man/man1', 'INSTALLVENDORMAN3DIR' => 'share/man/man3',"
   '';
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/pg_format
   '';
 
diff --git a/pkgs/development/tools/pgtop/default.nix b/pkgs/development/tools/pgtop/default.nix
index 5798b7da517a..066e07fd484a 100644
--- a/pkgs/development/tools/pgtop/default.nix
+++ b/pkgs/development/tools/pgtop/default.nix
@@ -15,8 +15,8 @@ perlPackages.buildPerlPackage rec {
 
   buildInputs = with perlPackages; [ DBI DBDPg TermReadKey JSON LWP ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/pgtop
   '';
 
diff --git a/pkgs/development/tools/poac/default.nix b/pkgs/development/tools/poac/default.nix
index 95a028c6f809..d6a1ad39bdaf 100644
--- a/pkgs/development/tools/poac/default.nix
+++ b/pkgs/development/tools/poac/default.nix
@@ -71,8 +71,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake git cacert ];
   buildInputs = [
     (boost179.override {
-      enableShared = stdenv.isDarwin;
-      enableStatic = !stdenv.isDarwin;
+      enableShared = stdenv.hostPlatform.isDarwin;
+      enableStatic = !stdenv.hostPlatform.isDarwin;
     })
     git2-cpp
     glob
diff --git a/pkgs/development/tools/py-spy/default.nix b/pkgs/development/tools/py-spy/default.nix
index 8522333ef9db..01d847649bbf 100644
--- a/pkgs/development/tools/py-spy/default.nix
+++ b/pkgs/development/tools/py-spy/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     python3
   ];
 
-  buildInputs = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  buildInputs = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     # Pull a header that contains a definition of proc_pid_rusage().
     darwin.apple_sdk_11_0.Libsystem
   ];
diff --git a/pkgs/development/tools/rbspy/default.nix b/pkgs/development/tools/rbspy/default.nix
index a109b0ea579e..beae01a2c57e 100644
--- a/pkgs/development/tools/rbspy/default.nix
+++ b/pkgs/development/tools/rbspy/default.nix
@@ -47,7 +47,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [
     ruby
     which
-  ] ++ lib.optional stdenv.isDarwin rustPlatform.bindgenHook;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin rustPlatform.bindgenHook;
 
   passthru.updateScript = nix-update-script { };
 
diff --git a/pkgs/development/tools/rcodesign/default.nix b/pkgs/development/tools/rcodesign/default.nix
index 72c261cfa0ed..a110611ab4a9 100644
--- a/pkgs/development/tools/rcodesign/default.nix
+++ b/pkgs/development/tools/rcodesign/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-cpQBdxTw/ge4VtzjdL2a2xgSeCT22fMIjuKu5UEedhI=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rebazel/default.nix b/pkgs/development/tools/rebazel/default.nix
index d5979ac53dbd..4b9549b8a58a 100644
--- a/pkgs/development/tools/rebazel/default.nix
+++ b/pkgs/development/tools/rebazel/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-cBAm8LyNKEVJkhZJ+QZU5XtQutb1oNvad8xH70Bi2LM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "tool for expediting bazel build workflows";
diff --git a/pkgs/development/tools/reindeer/default.nix b/pkgs/development/tools/reindeer/default.nix
index f3d384c5bfa2..3989e24c763f 100644
--- a/pkgs/development/tools/reindeer/default.nix
+++ b/pkgs/development/tools/reindeer/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs =
-    [ openssl ] ++ lib.optionals stdenv.isDarwin [
+    [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       libiconv
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.CoreServices
diff --git a/pkgs/development/tools/remodel/default.nix b/pkgs/development/tools/remodel/default.nix
index 2788f4fb11d8..83b32a7dd26f 100644
--- a/pkgs/development/tools/remodel/default.nix
+++ b/pkgs/development/tools/remodel/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/tools/reshape/default.nix b/pkgs/development/tools/reshape/default.nix
index 273b0577dc04..256f6515efd6 100644
--- a/pkgs/development/tools/reshape/default.nix
+++ b/pkgs/development/tools/reshape/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-VTJ3FNhVLgxo/VVBhk1yF9UUktLXcbrEkYwoyoWFhXA=";
 
   buildInputs =
-    lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   nativeCheckInputs = [
     postgresqlTestHook
diff --git a/pkgs/development/tools/rojo/default.nix b/pkgs/development/tools/rojo/default.nix
index 32ebfcf4189c..ada53d437f4a 100644
--- a/pkgs/development/tools/rojo/default.nix
+++ b/pkgs/development/tools/rojo/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     SystemConfiguration
   ];
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
   OPENSSL_NO_VENDOR = "1";
 
   # tests flaky on darwin on hydra
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Project management tool for Roblox";
diff --git a/pkgs/development/tools/rover/default.nix b/pkgs/development/tools/rover/default.nix
index c70869299c9d..92b5339fdfe9 100644
--- a/pkgs/development/tools/rover/default.nix
+++ b/pkgs/development/tools/rover/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Rf4kRXYW+WAF1rM7o8PmXBLgp/YyA8y/TqbZL22VOqI=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/development/tools/rtags/default.nix b/pkgs/development/tools/rtags/default.nix
index 3710cb6122a8..b3f9e00a81a5 100644
--- a/pkgs/development/tools/rtags/default.nix
+++ b/pkgs/development/tools/rtags/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config llvmPackages.llvm.dev ];
   buildInputs = [ llvmPackages.llvm llvmPackages.libclang openssl emacs ]
     ++ lib.optionals stdenv.cc.isGNU [ llvmPackages.clang-unwrapped ]
-    ++ lib.optionals stdenv.isDarwin [ apple_sdk.libs.xpc apple_sdk.frameworks.CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ apple_sdk.libs.xpc apple_sdk.frameworks.CoreServices ];
 
   src = fetchFromGitHub {
     owner = "andersbakken";
diff --git a/pkgs/development/tools/rubyfmt/default.nix b/pkgs/development/tools/rubyfmt/default.nix
index 287959dbf0b5..480826ab55d0 100644
--- a/pkgs/development/tools/rubyfmt/default.nix
+++ b/pkgs/development/tools/rubyfmt/default.nix
@@ -42,7 +42,7 @@ rustPlatform.buildRustPackage rec {
     libxcrypt
     libyaml
     rust-jemalloc-sys-unprefixed
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     readline
     libiconv
     libobjc
@@ -67,7 +67,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-QZ26GmsKyENkzdCGg2peie/aJhEt7KQAF/lwsibonDk=";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-fdeclspec";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-fdeclspec";
 
   preFixup = ''
     mv $out/bin/rubyfmt{-main,}
@@ -78,7 +78,7 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/fables-tales/rubyfmt";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ bobvanderlinden ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "rubyfmt";
   };
 }
diff --git a/pkgs/development/tools/rust/cargo-about/default.nix b/pkgs/development/tools/rust/cargo-about/default.nix
index ee7da1db8890..3da8e4beea34 100644
--- a/pkgs/development/tools/rust/cargo-about/default.nix
+++ b/pkgs/development/tools/rust/cargo-about/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ zstd ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/development/tools/rust/cargo-asm/default.nix b/pkgs/development/tools/rust/cargo-asm/default.nix
index 9c66f2cd9798..4e8cecb4a338 100644
--- a/pkgs/development/tools/rust/cargo-asm/default.nix
+++ b/pkgs/development/tools/rust/cargo-asm/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-QsaOFman+VBSIAbCalW63I3QXY0uECZy9+ufOKhSQrA=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # Test checks against machine code output, which fails with some
   # LLVM/compiler versions.
diff --git a/pkgs/development/tools/rust/cargo-audit/default.nix b/pkgs/development/tools/rust/cargo-audit/default.nix
index 01f72f1bc421..9de3d6c9437c 100644
--- a/pkgs/development/tools/rust/cargo-audit/default.nix
+++ b/pkgs/development/tools/rust/cargo-audit/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/development/tools/rust/cargo-bazel/default.nix b/pkgs/development/tools/rust/cargo-bazel/default.nix
index 22567ad2d135..151f155f9ee1 100644
--- a/pkgs/development/tools/rust/cargo-bazel/default.nix
+++ b/pkgs/development/tools/rust/cargo-bazel/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-+PVNB/apG5AR236Ikqt+JTz20zxc0HUi7z6BU6xq/Fw=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # `test_data` is explicitly excluded from the package published to crates.io, so tests cannot be run
   doCheck = false;
diff --git a/pkgs/development/tools/rust/cargo-binstall/default.nix b/pkgs/development/tools/rust/cargo-binstall/default.nix
index 205484f5fa70..f7b24266123f 100644
--- a/pkgs/development/tools/rust/cargo-binstall/default.nix
+++ b/pkgs/development/tools/rust/cargo-binstall/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     bzip2
     xz
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-bisect-rustc/default.nix b/pkgs/development/tools/rust/cargo-bisect-rustc/default.nix
index 9babac9ebade..8a89387ca848 100644
--- a/pkgs/development/tools/rust/cargo-bisect-rustc/default.nix
+++ b/pkgs/development/tools/rust/cargo-bisect-rustc/default.nix
@@ -39,13 +39,13 @@ rustPlatform.buildRustPackage rec {
               --subst-var libPath
           '';
     in
-    lib.optionals stdenv.isLinux [ patchelfPatch ];
+    lib.optionals stdenv.hostPlatform.isLinux [ patchelfPatch ];
 
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/development/tools/rust/cargo-bundle/default.nix b/pkgs/development/tools/rust/cargo-bundle/default.nix
index daf4bc230b8d..7d302da1003b 100644
--- a/pkgs/development/tools/rust/cargo-bundle/default.nix
+++ b/pkgs/development/tools/rust/cargo-bundle/default.nix
@@ -26,9 +26,9 @@ rustPlatform.buildRustPackage {
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libxkbcommon
     wayland
   ];
diff --git a/pkgs/development/tools/rust/cargo-c/default.nix b/pkgs/development/tools/rust/cargo-c/default.nix
index ca0f8a590ebd..3dd89aefe7ac 100644
--- a/pkgs/development/tools/rust/cargo-c/default.nix
+++ b/pkgs/development/tools/rust/cargo-c/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-UfhIz87s0CLUDbIpWMPzGQ7qVmh14GuiFoquauSbTOw=";
 
   nativeBuildInputs = [ pkg-config (lib.getDev curl) ];
-  buildInputs = [ openssl curl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl curl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     libiconv
     Security
diff --git a/pkgs/development/tools/rust/cargo-cache/default.nix b/pkgs/development/tools/rust/cargo-cache/default.nix
index 1c19b61bf8b4..fc5da4b5b1cb 100644
--- a/pkgs/development/tools/rust/cargo-cache/default.nix
+++ b/pkgs/development/tools/rust/cargo-cache/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-275QREIcncgBk4ah/CivSz5N2m6s/XPCfp6JGChpr38=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   checkFlags = [ "offline_tests" ];
 
diff --git a/pkgs/development/tools/rust/cargo-clone/default.nix b/pkgs/development/tools/rust/cargo-clone/default.nix
index c5e065eb2eaa..ee119146feaf 100644
--- a/pkgs/development/tools/rust/cargo-clone/default.nix
+++ b/pkgs/development/tools/rust/cargo-clone/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     Security
     SystemConfiguration
diff --git a/pkgs/development/tools/rust/cargo-codspeed/default.nix b/pkgs/development/tools/rust/cargo-codspeed/default.nix
index 23880c2480fc..ce20d409df28 100644
--- a/pkgs/development/tools/rust/cargo-codspeed/default.nix
+++ b/pkgs/development/tools/rust/cargo-codspeed/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-component/default.nix b/pkgs/development/tools/rust/cargo-component/default.nix
index fa8ba8accb04..e23844785c62 100644
--- a/pkgs/development/tools/rust/cargo-component/default.nix
+++ b/pkgs/development/tools/rust/cargo-component/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-crev/default.nix b/pkgs/development/tools/rust/cargo-crev/default.nix
index 0a2b797610d4..67c5ca0bc0a3 100644
--- a/pkgs/development/tools/rust/cargo-crev/default.nix
+++ b/pkgs/development/tools/rust/cargo-crev/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ perl pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ SystemConfiguration Security CoreFoundation libiconv curl ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ SystemConfiguration Security CoreFoundation libiconv curl ];
 
   nativeCheckInputs = [ git ];
 
diff --git a/pkgs/development/tools/rust/cargo-cyclonedx/default.nix b/pkgs/development/tools/rust/cargo-cyclonedx/default.nix
index 841a502a31f7..3fbb42c88aa1 100644
--- a/pkgs/development/tools/rust/cargo-cyclonedx/default.nix
+++ b/pkgs/development/tools/rust/cargo-cyclonedx/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
     CoreFoundation
diff --git a/pkgs/development/tools/rust/cargo-deadlinks/default.nix b/pkgs/development/tools/rust/cargo-deadlinks/default.nix
index d206e739bb83..70c9a377f00c 100644
--- a/pkgs/development/tools/rust/cargo-deadlinks/default.nix
+++ b/pkgs/development/tools/rust/cargo-deadlinks/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
     # assumes the target is x86_64-unknown-linux-gnu
     "--skip simple_project::it_checks_okay_project_correctly";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Cargo subcommand to check rust documentation for broken links";
diff --git a/pkgs/development/tools/rust/cargo-deny/default.nix b/pkgs/development/tools/rust/cargo-deny/default.nix
index 573bdb96db02..71ff14557fec 100644
--- a/pkgs/development/tools/rust/cargo-deny/default.nix
+++ b/pkgs/development/tools/rust/cargo-deny/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/rust/cargo-dephell/default.nix b/pkgs/development/tools/rust/cargo-dephell/default.nix
index 1302fd581bbe..b1f390f77388 100644
--- a/pkgs/development/tools/rust/cargo-dephell/default.nix
+++ b/pkgs/development/tools/rust/cargo-dephell/default.nix
@@ -26,13 +26,13 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     pkg-config
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
   ];
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
     darwin.apple_sdk.frameworks.Security
     libgit2
diff --git a/pkgs/development/tools/rust/cargo-dist/default.nix b/pkgs/development/tools/rust/cargo-dist/default.nix
index e7f5003768a6..cbdd2a90b591 100644
--- a/pkgs/development/tools/rust/cargo-dist/default.nix
+++ b/pkgs/development/tools/rust/cargo-dist/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     bzip2
     xz
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-duplicates/default.nix b/pkgs/development/tools/rust/cargo-duplicates/default.nix
index f9417651cf6a..17c9cd7d83de 100644
--- a/pkgs/development/tools/rust/cargo-duplicates/default.nix
+++ b/pkgs/development/tools/rust/cargo-duplicates/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-edit/default.nix b/pkgs/development/tools/rust/cargo-edit/default.nix
index 7a72bc360253..f42607332d71 100644
--- a/pkgs/development/tools/rust/cargo-edit/default.nix
+++ b/pkgs/development/tools/rust/cargo-edit/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl zlib ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl zlib ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-feature/default.nix b/pkgs/development/tools/rust/cargo-feature/default.nix
index 1e713076e1f3..81f0a1c62bb6 100644
--- a/pkgs/development/tools/rust/cargo-feature/default.nix
+++ b/pkgs/development/tools/rust/cargo-feature/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-8qrpW/gU7BvxN3nSbFWhbgu5bwsdzYZTS3w3kcwsGbU=";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   meta = with lib; {
     description = "Cargo plugin to manage dependency features";
diff --git a/pkgs/development/tools/rust/cargo-flamegraph/default.nix b/pkgs/development/tools/rust/cargo-flamegraph/default.nix
index 4a6d9c3ff39d..aca8e713e6e3 100644
--- a/pkgs/development/tools/rust/cargo-flamegraph/default.nix
+++ b/pkgs/development/tools/rust/cargo-flamegraph/default.nix
@@ -15,12 +15,12 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-KwpveTiViY+C4A+fE5yeGuT9PXbDyi+YsOc75mX2KdU=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ makeWrapper ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ makeWrapper ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/cargo-flamegraph \
       --set-default PERF ${perf}/bin/perf
     wrapProgram $out/bin/flamegraph \
diff --git a/pkgs/development/tools/rust/cargo-fund/default.nix b/pkgs/development/tools/rust/cargo-fund/default.nix
index 42f703aaa240..23d13a8841ae 100644
--- a/pkgs/development/tools/rust/cargo-fund/default.nix
+++ b/pkgs/development/tools/rust/cargo-fund/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security libiconv curl ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security libiconv curl ];
 
   meta = with lib; {
     description = "Discover funding links for your project's dependencies";
diff --git a/pkgs/development/tools/rust/cargo-fuzz/default.nix b/pkgs/development/tools/rust/cargo-fuzz/default.nix
index fc60b761fe4e..6c296e8ccbce 100644
--- a/pkgs/development/tools/rust/cargo-fuzz/default.nix
+++ b/pkgs/development/tools/rust/cargo-fuzz/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-sfvepPpYtgA0TuUlu0CD50HX933AVQbUGzJBNAzFR94=";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   doCheck = false;
 
diff --git a/pkgs/development/tools/rust/cargo-generate/default.nix b/pkgs/development/tools/rust/cargo-generate/default.nix
index f4c25a60dbc4..fa6a0578028f 100644
--- a/pkgs/development/tools/rust/cargo-generate/default.nix
+++ b/pkgs/development/tools/rust/cargo-generate/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ libgit2 openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ libgit2 openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
@@ -44,7 +44,7 @@ rustPlatform.buildRustPackage rec {
   # - should_canonicalize: the test assumes that it will be called from the /Users/<project_dir>/ folder on darwin variant.
   checkFlags = [
     "--skip=favorites::favorites_default_to_git_if_not_defined"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--skip=git::utils::should_canonicalize"
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-guppy/default.nix b/pkgs/development/tools/rust/cargo-guppy/default.nix
index 13bb3eaff1cf..68a696ab1ae9 100644
--- a/pkgs/development/tools/rust/cargo-guppy/default.nix
+++ b/pkgs/development/tools/rust/cargo-guppy/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-hf2/default.nix b/pkgs/development/tools/rust/cargo-hf2/default.nix
index ec689cb515d6..8859fa605a42 100644
--- a/pkgs/development/tools/rust/cargo-hf2/default.nix
+++ b/pkgs/development/tools/rust/cargo-hf2/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ libusb1 ] ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = [ libusb1 ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   meta = with lib; {
     description = "Cargo Subcommand for Microsoft HID Flashing Library for UF2 Bootloaders";
diff --git a/pkgs/development/tools/rust/cargo-info/default.nix b/pkgs/development/tools/rust/cargo-info/default.nix
index 096ef8f764e9..f6aa12d2c5a7 100644
--- a/pkgs/development/tools/rust/cargo-info/default.nix
+++ b/pkgs/development/tools/rust/cargo-info/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-inspect/default.nix b/pkgs/development/tools/rust/cargo-inspect/default.nix
index e8b1443dd009..b1126b42f248 100644
--- a/pkgs/development/tools/rust/cargo-inspect/default.nix
+++ b/pkgs/development/tools/rust/cargo-inspect/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "026vc8d0jkc1d7dlp3ldmwks7svpvqzl0k5niri8a12cl5w5b9hj";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoHash = "sha256-+cYbejdZOmvaX8jdf1llAvaTefPVtIOl1fqGm5tHMRk=";
 
diff --git a/pkgs/development/tools/rust/cargo-lambda/default.nix b/pkgs/development/tools/rust/cargo-lambda/default.nix
index 75127127eae2..b63c9e43b415 100644
--- a/pkgs/development/tools/rust/cargo-lambda/default.nix
+++ b/pkgs/development/tools/rust/cargo-lambda/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       curl
       CoreServices
       Security
diff --git a/pkgs/development/tools/rust/cargo-leptos/default.nix b/pkgs/development/tools/rust/cargo-leptos/default.nix
index 2beed790ed69..5a14ac34252d 100644
--- a/pkgs/development/tools/rust/cargo-leptos/default.nix
+++ b/pkgs/development/tools/rust/cargo-leptos/default.nix
@@ -10,7 +10,7 @@ let
     SystemConfiguration
     Security;
   inherit (lib) optionals;
-  inherit (stdenv) isDarwin;
+  inherit (stdenv.hostPlatform) isDarwin;
 in
 rustPlatform.buildRustPackage rec {
   pname = "cargo-leptos";
diff --git a/pkgs/development/tools/rust/cargo-limit/default.nix b/pkgs/development/tools/rust/cargo-limit/default.nix
index 958bfeb447c3..7132ebff02ad 100644
--- a/pkgs/development/tools/rust/cargo-limit/default.nix
+++ b/pkgs/development/tools/rust/cargo-limit/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-dwqbG0UFeUQHa0K98ebHfjbcQuQOhK2s6ZxAT6r0cik=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   passthru = {
     updateScript = nix-update-script { };
diff --git a/pkgs/development/tools/rust/cargo-llvm-cov/default.nix b/pkgs/development/tools/rust/cargo-llvm-cov/default.nix
index 387460a0dd16..2672d165b26d 100644
--- a/pkgs/development/tools/rust/cargo-llvm-cov/default.nix
+++ b/pkgs/development/tools/rust/cargo-llvm-cov/default.nix
@@ -94,6 +94,6 @@ rustPlatform.buildRustPackage {
     maintainers = with lib.maintainers; [ wucke13 matthiasbeyer CobaltCause ];
 
     # The profiler runtime is (currently) disabled on non-Linux platforms
-    broken = !(stdenv.isLinux && !stdenv.targetPlatform.isRedox);
+    broken = !(stdenv.hostPlatform.isLinux && !stdenv.targetPlatform.isRedox);
   };
 }
diff --git a/pkgs/development/tools/rust/cargo-local-registry/default.nix b/pkgs/development/tools/rust/cargo-local-registry/default.nix
index 76f26decd868..7e6c0c917a73 100644
--- a/pkgs/development/tools/rust/cargo-local-registry/default.nix
+++ b/pkgs/development/tools/rust/cargo-local-registry/default.nix
@@ -33,9 +33,9 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-mobile2/default.nix b/pkgs/development/tools/rust/cargo-mobile2/default.nix
index 28c94f9a0f02..17ba08923b1f 100644
--- a/pkgs/development/tools/rust/cargo-mobile2/default.nix
+++ b/pkgs/development/tools/rust/cargo-mobile2/default.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage {
     export CARGO_HOME=$out/share/
   '';
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
   nativeBuildInputs = [ pkg-config git makeWrapper ];
 
   preFixup = ''
diff --git a/pkgs/development/tools/rust/cargo-modules/default.nix b/pkgs/development/tools/rust/cargo-modules/default.nix
index 3787173f0fff..da236481f45d 100644
--- a/pkgs/development/tools/rust/cargo-modules/default.nix
+++ b/pkgs/development/tools/rust/cargo-modules/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-j3AYWKq7SrlNlsY7A80iwcWKW8wi6hx0U9UwDIQkXZs=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-msrv/default.nix b/pkgs/development/tools/rust/cargo-msrv/default.nix
index e8b23c70bd11..2db732560df1 100644
--- a/pkgs/development/tools/rust/cargo-msrv/default.nix
+++ b/pkgs/development/tools/rust/cargo-msrv/default.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
   # Integration tests fail
   doCheck = false;
 
-  buildInputs = if stdenv.isDarwin
+  buildInputs = if stdenv.hostPlatform.isDarwin
     then [ libiconv Security ]
     else [ openssl ];
 
diff --git a/pkgs/development/tools/rust/cargo-mutants/default.nix b/pkgs/development/tools/rust/cargo-mutants/default.nix
index 742000213879..e5e7fcde55cb 100644
--- a/pkgs/development/tools/rust/cargo-mutants/default.nix
+++ b/pkgs/development/tools/rust/cargo-mutants/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-VRkhDgKunSUOz2/U4oC2t0YrDh5l48z4luevMazfj6o=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-ndk/default.nix b/pkgs/development/tools/rust/cargo-ndk/default.nix
index b1068127483b..1397ffc3742c 100644
--- a/pkgs/development/tools/rust/cargo-ndk/default.nix
+++ b/pkgs/development/tools/rust/cargo-ndk/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-sIKan8LnGv4sGVrGOUOKSD3R4fNRu5yBFATm5MWDTSU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreGraphics
     Foundation
   ];
diff --git a/pkgs/development/tools/rust/cargo-outdated/default.nix b/pkgs/development/tools/rust/cargo-outdated/default.nix
index 64b7c4a77656..0c575c604cf8 100644
--- a/pkgs/development/tools/rust/cargo-outdated/default.nix
+++ b/pkgs/development/tools/rust/cargo-outdated/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
     CoreFoundation
     CoreServices
diff --git a/pkgs/development/tools/rust/cargo-pgrx/buildPgrxExtension.nix b/pkgs/development/tools/rust/cargo-pgrx/buildPgrxExtension.nix
index 5c49d5bd2be7..89293ab62ef8 100644
--- a/pkgs/development/tools/rust/cargo-pgrx/buildPgrxExtension.nix
+++ b/pkgs/development/tools/rust/cargo-pgrx/buildPgrxExtension.nix
@@ -102,7 +102,7 @@ let
   # so we don't accidentally `(rustPlatform.buildRustPackage argsForBuildRustPackage) // { ... }` because
   # we forgot parentheses
   finalArgs = argsForBuildRustPackage // {
-    buildInputs = (args.buildInputs or [ ]) ++ lib.optionals stdenv.isDarwin [ Security ];
+    buildInputs = (args.buildInputs or [ ]) ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
     nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [
       cargo-pgrx
@@ -119,7 +119,7 @@ let
       ${maybeEnterBuildAndTestSubdir}
 
       PGRX_BUILD_FLAGS="--frozen -j $NIX_BUILD_CORES ${builtins.concatStringsSep " " cargoBuildFlags}" \
-      ${lib.optionalString stdenv.isDarwin ''RUSTFLAGS="''${RUSTFLAGS:+''${RUSTFLAGS} }-Clink-args=-Wl,-undefined,dynamic_lookup"''} \
+      ${lib.optionalString stdenv.hostPlatform.isDarwin ''RUSTFLAGS="''${RUSTFLAGS:+''${RUSTFLAGS} }-Clink-args=-Wl,-undefined,dynamic_lookup"''} \
       cargo pgrx package \
         --pg-config ${lib.getDev postgresql}/bin/pg_config \
         ${maybeDebugFlag} \
diff --git a/pkgs/development/tools/rust/cargo-pgrx/default.nix b/pkgs/development/tools/rust/cargo-pgrx/default.nix
index ca7014cf1e3a..93010928ddc6 100644
--- a/pkgs/development/tools/rust/cargo-pgrx/default.nix
+++ b/pkgs/development/tools/rust/cargo-pgrx/default.nix
@@ -24,13 +24,13 @@ let
 
       inherit cargoHash;
 
-      nativeBuildInputs = lib.optionals stdenv.isLinux [
+      nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
         pkg-config
       ];
 
-      buildInputs = lib.optionals stdenv.isLinux [
+      buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
         openssl
-      ] ++ lib.optionals stdenv.isDarwin [
+      ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
         darwin.apple_sdk.frameworks.Security
       ];
 
diff --git a/pkgs/development/tools/rust/cargo-public-api/default.nix b/pkgs/development/tools/rust/cargo-public-api/default.nix
index d7abd37316c1..8bc991d0bd4c 100644
--- a/pkgs/development/tools/rust/cargo-public-api/default.nix
+++ b/pkgs/development/tools/rust/cargo-public-api/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ curl openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   # Tests fail
   doCheck = false;
diff --git a/pkgs/development/tools/rust/cargo-release/default.nix b/pkgs/development/tools/rust/cargo-release/default.nix
index 8f9abcb28da2..c818582433a2 100644
--- a/pkgs/development/tools/rust/cargo-release/default.nix
+++ b/pkgs/development/tools/rust/cargo-release/default.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libgit2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/rust/cargo-risczero/default.nix b/pkgs/development/tools/rust/cargo-risczero/default.nix
index ead0103d3f65..bf61c32cf778 100644
--- a/pkgs/development/tools/rust/cargo-risczero/default.nix
+++ b/pkgs/development/tools/rust/cargo-risczero/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-semver-checks/default.nix b/pkgs/development/tools/rust/cargo-semver-checks/default.nix
index a219cbd41d1d..ad2e4b7f337e 100644
--- a/pkgs/development/tools/rust/cargo-semver-checks/default.nix
+++ b/pkgs/development/tools/rust/cargo-semver-checks/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-shuttle/default.nix b/pkgs/development/tools/rust/cargo-shuttle/default.nix
index 61a0bf1c6c06..57d61041857a 100644
--- a/pkgs/development/tools/rust/cargo-shuttle/default.nix
+++ b/pkgs/development/tools/rust/cargo-shuttle/default.nix
@@ -37,7 +37,7 @@ rustPlatform.buildRustPackage rec {
       openssl
       zlib
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
diff --git a/pkgs/development/tools/rust/cargo-spellcheck/default.nix b/pkgs/development/tools/rust/cargo-spellcheck/default.nix
index aae0be337614..6d6bfa5ae258 100644
--- a/pkgs/development/tools/rust/cargo-spellcheck/default.nix
+++ b/pkgs/development/tools/rust/cargo-spellcheck/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ rustPlatform.bindgenHook ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   preCheck = "HOME=$(mktemp -d)";
 
diff --git a/pkgs/development/tools/rust/cargo-supply-chain/default.nix b/pkgs/development/tools/rust/cargo-supply-chain/default.nix
index 395a48498237..073500a16e2f 100644
--- a/pkgs/development/tools/rust/cargo-supply-chain/default.nix
+++ b/pkgs/development/tools/rust/cargo-supply-chain/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Fx1C4X0dQqePqLa+X+4ZDrIMFKBQ6J50nBApYXcGbFM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/cargo-tally/default.nix b/pkgs/development/tools/rust/cargo-tally/default.nix
index 828f50e467c3..b85112f75538 100644
--- a/pkgs/development/tools/rust/cargo-tally/default.nix
+++ b/pkgs/development/tools/rust/cargo-tally/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Dkz3QJchUAn4/kQsmQcSfxVrRdiCA2qJSOTszfvE4No=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
     DiskArbitration
     Foundation
     IOKit
diff --git a/pkgs/development/tools/rust/cargo-tauri/default.nix b/pkgs/development/tools/rust/cargo-tauri/default.nix
index 1dcc79fb4b75..7ae69fa55283 100644
--- a/pkgs/development/tools/rust/cargo-tauri/default.nix
+++ b/pkgs/development/tools/rust/cargo-tauri/default.nix
@@ -35,14 +35,14 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       glibc
       libsoup
       cairo
       gtk3
       webkitgtk
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreServices
       Security
       SystemConfiguration
diff --git a/pkgs/development/tools/rust/cargo-udeps/default.nix b/pkgs/development/tools/rust/cargo-udeps/default.nix
index bc72b8a6a757..a41e2616ba89 100644
--- a/pkgs/development/tools/rust/cargo-udeps/default.nix
+++ b/pkgs/development/tools/rust/cargo-udeps/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   # TODO figure out how to use provided curl instead of compiling curl from curl-sys
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices Security libiconv SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security libiconv SystemConfiguration ];
 
   # Requires network access
   doCheck = false;
diff --git a/pkgs/development/tools/rust/cargo-ui/default.nix b/pkgs/development/tools/rust/cargo-ui/default.nix
index 01578e497deb..fedd72458c8e 100644
--- a/pkgs/development/tools/rust/cargo-ui/default.nix
+++ b/pkgs/development/tools/rust/cargo-ui/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libgit2
     openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     expat
     fontconfig
     libGL
@@ -39,11 +39,11 @@ rustPlatform.buildRustPackage rec {
     xorg.libXi
     xorg.libXrandr
     xorg.libxcb
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/cargo-ui \
       --add-rpath ${lib.makeLibraryPath [ fontconfig libGL ]}
   '';
diff --git a/pkgs/development/tools/rust/cargo-unused-features/default.nix b/pkgs/development/tools/rust/cargo-unused-features/default.nix
index 32fae29d903a..cf1fd1deb398 100644
--- a/pkgs/development/tools/rust/cargo-unused-features/default.nix
+++ b/pkgs/development/tools/rust/cargo-unused-features/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
     curl
     libgit2
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/development/tools/rust/cargo-update/default.nix b/pkgs/development/tools/rust/cargo-update/default.nix
index f2aa80920811..b98d1dd513e0 100644
--- a/pkgs/development/tools/rust/cargo-update/default.nix
+++ b/pkgs/development/tools/rust/cargo-update/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
     pkg-config
     ronn
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
   ];
 
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
     libssh2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     curl
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/development/tools/rust/cargo-vet/default.nix b/pkgs/development/tools/rust/cargo-vet/default.nix
index 96822b3078d2..69c5d69d2c69 100644
--- a/pkgs/development/tools/rust/cargo-vet/default.nix
+++ b/pkgs/development/tools/rust/cargo-vet/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-M8sZzgSEMIB6pPVaE+tC18MCbwYaYpHOnhrEvm9JTso=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # the test_project tests require internet access
   checkFlags = [
diff --git a/pkgs/development/tools/rust/cargo-watch/default.nix b/pkgs/development/tools/rust/cargo-watch/default.nix
index 69c04b520b30..1033476eb976 100644
--- a/pkgs/development/tools/rust/cargo-watch/default.nix
+++ b/pkgs/development/tools/rust/cargo-watch/default.nix
@@ -19,9 +19,9 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-skUG1B6TCFEXeQSRwA6vWjXmNifk5bTR4+JESw7CZMo=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Foundation Cocoa ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Foundation Cocoa ];
 
-  NIX_LDFLAGS = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ "-framework" "AppKit" ];
+  NIX_LDFLAGS = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ "-framework" "AppKit" ];
 
   # `test with_cargo` tries to call cargo-watch as a cargo subcommand
   # (calling cargo-watch with command `cargo watch`)
diff --git a/pkgs/development/tools/rust/cargo-web/default.nix b/pkgs/development/tools/rust/cargo-web/default.nix
index 11f1fc6aacf0..7bbc503fd128 100644
--- a/pkgs/development/tools/rust/cargo-web/default.nix
+++ b/pkgs/development/tools/rust/cargo-web/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-apPXSG8RV9hZ+jttn4XHhgmuLQ7344SQJna7Z/fu/mA=";
 
   nativeBuildInputs = [ openssl perl pkg-config ];
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security ];
 
   meta = with lib; {
     description = "Cargo subcommand for the client-side Web";
diff --git a/pkgs/development/tools/rust/cargo-whatfeatures/default.nix b/pkgs/development/tools/rust/cargo-whatfeatures/default.nix
index 4e757c6402a3..42b3078f4e94 100644
--- a/pkgs/development/tools/rust/cargo-whatfeatures/default.nix
+++ b/pkgs/development/tools/rust/cargo-whatfeatures/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Simple cargo plugin to get a list of features for a specific crate";
diff --git a/pkgs/development/tools/rust/cargo-workspaces/default.nix b/pkgs/development/tools/rust/cargo-workspaces/default.nix
index 32c4730b3940..5e0b5483e754 100644
--- a/pkgs/development/tools/rust/cargo-workspaces/default.nix
+++ b/pkgs/development/tools/rust/cargo-workspaces/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     libssh2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/rust/cbindgen/default.nix b/pkgs/development/tools/rust/cbindgen/default.nix
index 95dacabcf5d2..ff4cfdf9ef86 100644
--- a/pkgs/development/tools/rust/cbindgen/default.nix
+++ b/pkgs/development/tools/rust/cbindgen/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-l4FgwXdibek4BAnqjWd1rLxpEwuMNjYgvo6X3SS3fRo=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   nativeCheckInputs = [
     cmake
@@ -40,7 +40,7 @@ rustPlatform.buildRustPackage rec {
     "--skip lib_default_uses_debug_build"
     "--skip lib_explicit_debug_build"
     "--skip lib_explicit_release_build"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # WORKAROUND: test_body fails when using clang
     # https://github.com/eqrion/cbindgen/issues/628
     "--skip test_body"
diff --git a/pkgs/development/tools/rust/dioxus-cli/default.nix b/pkgs/development/tools/rust/dioxus-cli/default.nix
index 68632a1d6002..b66b99b87bd3 100644
--- a/pkgs/development/tools/rust/dioxus-cli/default.nix
+++ b/pkgs/development/tools/rust/dioxus-cli/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-shllaNdg9g6fD8qRyCKpN47keFUTu0g96MzVX4BrhXI=";
 
   nativeBuildInputs = [ pkg-config cacert ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/rust/duckscript/default.nix b/pkgs/development/tools/rust/duckscript/default.nix
index be536194d290..dfdb3e5e008f 100644
--- a/pkgs/development/tools/rust/duckscript/default.nix
+++ b/pkgs/development/tools/rust/duckscript/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration libiconv ];
 
   cargoHash = "sha256-bBqcHETEWooMgQeqPOZIK/77DdTtGq1JusBKoRj5K6w=";
 
diff --git a/pkgs/development/tools/rust/humility/default.nix b/pkgs/development/tools/rust/humility/default.nix
index a8c157f9ac4d..5486d0785233 100644
--- a/pkgs/development/tools/rust/humility/default.nix
+++ b/pkgs/development/tools/rust/humility/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   version = "unstable-2023-11-08";
 
   nativeBuildInputs = [ pkg-config cargo-readme ];
-  buildInputs = [ libusb1 libftdi ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ libusb1 libftdi ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
   ];
 
diff --git a/pkgs/development/tools/rust/panamax/default.nix b/pkgs/development/tools/rust/panamax/default.nix
index 16d8176de4eb..3ca774d0d30f 100644
--- a/pkgs/development/tools/rust/panamax/default.nix
+++ b/pkgs/development/tools/rust/panamax/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/rust/rust-analyzer/default.nix b/pkgs/development/tools/rust/rust-analyzer/default.nix
index 6326657372c4..7fd2aafb7054 100644
--- a/pkgs/development/tools/rust/rust-analyzer/default.nix
+++ b/pkgs/development/tools/rust/rust-analyzer/default.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = lib.optional useMimalloc cmake;
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     libiconv
   ];
diff --git a/pkgs/development/tools/rust/rustup-toolchain-install-master/default.nix b/pkgs/development/tools/rust/rustup-toolchain-install-master/default.nix
index d71b1e655d78..f5dacb999a68 100644
--- a/pkgs/development/tools/rust/rustup-toolchain-install-master/default.nix
+++ b/pkgs/development/tools/rust/rustup-toolchain-install-master/default.nix
@@ -41,13 +41,13 @@ rustPlatform.buildRustPackage rec {
           --subst-var libPath
       '';
     in
-    lib.optionals stdenv.isLinux [ patchelfPatch ];
+    lib.optionals stdenv.hostPlatform.isLinux [ patchelfPatch ];
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [
     openssl
     xz
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/tools/rust/rustup/default.nix b/pkgs/development/tools/rust/rustup/default.nix
index b59d9d08ef23..5824696a43ac 100644
--- a/pkgs/development/tools/rust/rustup/default.nix
+++ b/pkgs/development/tools/rust/rustup/default.nix
@@ -39,13 +39,13 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     (curl.override { inherit openssl; })
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ CoreServices Security libiconv xz ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security libiconv xz ];
 
   buildFeatures = [ "no-self-update" ];
 
   checkFeatures = [ "test" ];
 
-  patches = lib.optionals stdenv.isLinux [
+  patches = lib.optionals stdenv.hostPlatform.isLinux [
     (runCommand "0001-dynamically-patchelf-binaries.patch"
       {
         CC = stdenv.cc;
@@ -62,7 +62,7 @@ rustPlatform.buildRustPackage rec {
 
   # Random tests fail nondeterministically on macOS.
   # TODO: Investigate this.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # skip failing tests
   checkFlags = [
diff --git a/pkgs/development/tools/rust/rustycli/default.nix b/pkgs/development/tools/rust/rustycli/default.nix
index 09bc2e44f748..ce16743a0715 100644
--- a/pkgs/development/tools/rust/rustycli/default.nix
+++ b/pkgs/development/tools/rust/rustycli/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-WU3lgGJH6qVDI1Un3HBqg0edqiP5sobTsAIXdnjeNTU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/rust/sqlx-cli/default.nix b/pkgs/development/tools/rust/sqlx-cli/default.nix
index ca608dafd10c..71f6b2b9ddcd 100644
--- a/pkgs/development/tools/rust/sqlx-cli/default.nix
+++ b/pkgs/development/tools/rust/sqlx-cli/default.nix
@@ -45,10 +45,10 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs =
-    lib.optionals stdenv.isLinux [
+    lib.optionals stdenv.hostPlatform.isLinux [
       openssl
     ] ++
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       CoreFoundation
       Security
       SystemConfiguration
diff --git a/pkgs/development/tools/sauce-connect/default.nix b/pkgs/development/tools/sauce-connect/default.nix
index 562125acf068..6d3c5434e20a 100644
--- a/pkgs/development/tools/sauce-connect/default.nix
+++ b/pkgs/development/tools/sauce-connect/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ unzip ];
 
-  patchPhase = lib.optionalString stdenv.isLinux ''
+  patchPhase = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf \
       --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
       --set-rpath "$out/lib:${lib.makeLibraryPath [zlib]}" \
diff --git a/pkgs/development/tools/scenic-view/default.nix b/pkgs/development/tools/scenic-view/default.nix
index 3fc74d7e3c73..925fc8d5b29d 100644
--- a/pkgs/development/tools/scenic-view/default.nix
+++ b/pkgs/development/tools/scenic-view/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, openjdk, openjfx, gradle_7, makeDesktopItem, makeWrapper }:
 let
-  jdk = openjdk.override (lib.optionalAttrs stdenv.isLinux {
+  jdk = openjdk.override (lib.optionalAttrs stdenv.hostPlatform.isLinux {
     enableJavaFX = true;
     openjfx = openjfx.override { withWebKit = true; };
   });
@@ -52,7 +52,7 @@ in stdenv.mkDerivation rec {
   desktopItems = [ desktopItem ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "JavaFx application to visualize and modify the scenegraph of running JavaFx applications";
     mainProgram = "scenic-view";
     longDescription = ''
diff --git a/pkgs/development/tools/sea-orm-cli/default.nix b/pkgs/development/tools/sea-orm-cli/default.nix
index 1562780858ae..6e9df125e3bb 100644
--- a/pkgs/development/tools/sea-orm-cli/default.nix
+++ b/pkgs/development/tools/sea-orm-cli/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   cargoHash = "sha256-ZGM+Y67ycBiukgEBUq+WiA1OUCGahya591gM6CGwzMQ=";
 
diff --git a/pkgs/development/tools/selene/default.nix b/pkgs/development/tools/selene/default.nix
index 0d836fe7a24d..bcd1409b9985 100644
--- a/pkgs/development/tools/selene/default.nix
+++ b/pkgs/development/tools/selene/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = lib.optionals robloxSupport [
     openssl
-  ] ++ lib.optionals (robloxSupport && stdenv.isDarwin) [
+  ] ++ lib.optionals (robloxSupport && stdenv.hostPlatform.isDarwin) [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/semantic-release/default.nix b/pkgs/development/tools/semantic-release/default.nix
index 95f92919d15d..da97f7e61bb8 100644
--- a/pkgs/development/tools/semantic-release/default.nix
+++ b/pkgs/development/tools/semantic-release/default.nix
@@ -23,7 +23,7 @@ buildNpmPackage rec {
 
   nativeBuildInputs = [
     python3
-  ] ++ lib.optional stdenv.isDarwin cctools;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin cctools;
 
   # Fixes `semantic-release --version` output
   postPatch = ''
diff --git a/pkgs/development/tools/sentry-cli/default.nix b/pkgs/development/tools/sentry-cli/default.nix
index 2adcaf4dc462..52e7927bb18a 100644
--- a/pkgs/development/tools/sentry-cli/default.nix
+++ b/pkgs/development/tools/sentry-cli/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   # Needed to get openssl-sys to use pkgconfig.
   OPENSSL_NO_VENDOR = 1;
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ CoreServices Security SystemConfiguration ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security SystemConfiguration ];
   nativeBuildInputs = [ installShellFiles pkg-config ];
 
   cargoHash = "sha256-fzQfU3xlRwV/GI69+sd7zz4okbNHbFAskJPgI1X0KQo=";
diff --git a/pkgs/development/tools/simavr/default.nix b/pkgs/development/tools/simavr/default.nix
index deab8539ef14..e50986dd6502 100644
--- a/pkgs/development/tools/simavr/default.nix
+++ b/pkgs/development/tools/simavr/default.nix
@@ -31,12 +31,12 @@ in stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ which pkg-config avrgcc ]
-    ++ lib.optional stdenv.isDarwin setupHookDarwin;
+    ++ lib.optional stdenv.hostPlatform.isDarwin setupHookDarwin;
   buildInputs = [ libelf libglut libGLU libGL ]
-    ++ lib.optional stdenv.isDarwin GLUT;
+    ++ lib.optional stdenv.hostPlatform.isDarwin GLUT;
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$out"/bin/*
   '';
 
diff --git a/pkgs/development/tools/skopeo/default.nix b/pkgs/development/tools/skopeo/default.nix
index 082abb488cb7..facfb6e7c56a 100644
--- a/pkgs/development/tools/skopeo/default.nix
+++ b/pkgs/development/tools/skopeo/default.nix
@@ -36,7 +36,7 @@ buildGoModule rec {
   nativeBuildInputs = [ pkg-config go-md2man installShellFiles makeWrapper ];
 
   buildInputs = [ gpgme ]
-    ++ lib.optionals stdenv.isLinux [ lvm2 btrfs-progs ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ lvm2 btrfs-progs ];
 
   buildPhase = ''
     runHook preBuild
@@ -49,7 +49,7 @@ buildGoModule rec {
     runHook preInstall
     PREFIX=${placeholder "out"} make install-binary install-completions install-docs
     install ${passthru.policy}/default-policy.json -Dt $out/etc/containers
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/skopeo \
       --prefix PATH : ${lib.makeBinPath [ fuse-overlayfs ]}
   '' + ''
diff --git a/pkgs/development/tools/spr/default.nix b/pkgs/development/tools/spr/default.nix
index 7ecd5dcfb257..d7a9b4530c63 100644
--- a/pkgs/development/tools/spr/default.nix
+++ b/pkgs/development/tools/spr/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-VQg3HDNw+L1FsFtHXnIw6dMVUxV63ZWHCxiknzsqXW8=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Submit pull requests for individual, amendable, rebaseable commits to GitHub";
diff --git a/pkgs/development/tools/sqsh/default.nix b/pkgs/development/tools/sqsh/default.nix
index ec071f739efa..e7b0342ac697 100644
--- a/pkgs/development/tools/sqsh/default.nix
+++ b/pkgs/development/tools/sqsh/default.nix
@@ -14,7 +14,7 @@ in stdenv.mkDerivation rec {
 
   preConfigure = ''
     export SYBASE=${freetds}
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace "libct.so" "libct.dylib"
   '';
 
diff --git a/pkgs/development/tools/squawk/default.nix b/pkgs/development/tools/squawk/default.nix
index 5270523caf6e..2190401c00bd 100644
--- a/pkgs/development/tools/squawk/default.nix
+++ b/pkgs/development/tools/squawk/default.nix
@@ -27,10 +27,10 @@ rustPlatform.buildRustPackage rec {
     rustPlatform.bindgenHook
   ];
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libiconv
     openssl
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     CoreFoundation
     Security
   ]);
diff --git a/pkgs/development/tools/subxt/default.nix b/pkgs/development/tools/subxt/default.nix
index e239483e4a61..73907cac3731 100644
--- a/pkgs/development/tools/subxt/default.nix
+++ b/pkgs/development/tools/subxt/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   # Needed by wabt-sys
   nativeBuildInputs = [ cmake ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/taplo/default.nix b/pkgs/development/tools/taplo/default.nix
index 77774a0d9a72..d353127070a8 100644
--- a/pkgs/development/tools/taplo/default.nix
+++ b/pkgs/development/tools/taplo/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/development/tools/tarmac/default.nix b/pkgs/development/tools/tarmac/default.nix
index 34471106d73a..a2b03fa93cbd 100644
--- a/pkgs/development/tools/tarmac/default.nix
+++ b/pkgs/development/tools/tarmac/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/development/tools/teller/default.nix b/pkgs/development/tools/teller/default.nix
index 16e44c4637c6..21eb39d6558a 100644
--- a/pkgs/development/tools/teller/default.nix
+++ b/pkgs/development/tools/teller/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.SystemConfiguration ];
 
   doCheck = false;
 
diff --git a/pkgs/development/tools/the-way/default.nix b/pkgs/development/tools/the-way/default.nix
index 550553385828..2101512886fc 100644
--- a/pkgs/development/tools/the-way/default.nix
+++ b/pkgs/development/tools/the-way/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
diff --git a/pkgs/development/tools/trunk/default.nix b/pkgs/development/tools/trunk/default.nix
index 17cf053b98f1..9845c565196b 100644
--- a/pkgs/development/tools/trunk/default.nix
+++ b/pkgs/development/tools/trunk/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = if stdenv.isDarwin
+  buildInputs = if stdenv.hostPlatform.isDarwin
     then [ CoreServices SystemConfiguration ]
     else [ openssl ];
   # requires network
diff --git a/pkgs/development/tools/ttfb/default.nix b/pkgs/development/tools/ttfb/default.nix
index c2c599f32ff7..e9bc3c11bdfb 100644
--- a/pkgs/development/tools/ttfb/default.nix
+++ b/pkgs/development/tools/ttfb/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-Cdup65w31wF1RZu0g4/msHfLESrNTcuCU5kxkk0gnW8=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/development/tools/vagrant/default.nix b/pkgs/development/tools/vagrant/default.nix
index 064f1cf6baaa..6eb3ceca77aa 100644
--- a/pkgs/development/tools/vagrant/default.nix
+++ b/pkgs/development/tools/vagrant/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, buildRubyGem, bundlerEnv, ruby, libarchive
-, libguestfs, qemu, writeText, withLibvirt ? stdenv.isLinux
+, libguestfs, qemu, writeText, withLibvirt ? stdenv.hostPlatform.isLinux
 , openssl
 }:
 
diff --git a/pkgs/development/tools/viceroy/default.nix b/pkgs/development/tools/viceroy/default.nix
index 16282c7f7dd9..34c547a461fe 100644
--- a/pkgs/development/tools/viceroy/default.nix
+++ b/pkgs/development/tools/viceroy/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-0jED0Ju7ojqDxfEjZKmWuCfGR830/gJF5p+QtcVajIY=";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   cargoHash = "sha256-rSZe/MrJlbB0oaAsKg38mEnS3pqe9Rk4/aoRuLlOUFc=";
 
diff --git a/pkgs/development/tools/volta/default.nix b/pkgs/development/tools/volta/default.nix
index 15c9c493b797..c49145e0a9d6 100644
--- a/pkgs/development/tools/volta/default.nix
+++ b/pkgs/development/tools/volta/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   buildInputs = [ installShellFiles ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security libiconv ];
 
   HOME = "$TMPDIR";
 
diff --git a/pkgs/development/tools/wails/default.nix b/pkgs/development/tools/wails/default.nix
index 8988424d7738..de73c6b63764 100644
--- a/pkgs/development/tools/wails/default.nix
+++ b/pkgs/development/tools/wails/default.nix
@@ -46,7 +46,7 @@ buildGoModule rec {
     go
     stdenv.cc
     nodejs
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     gtk3
     webkitgtk
   ];
@@ -60,7 +60,7 @@ buildGoModule rec {
   postFixup = ''
     wrapProgram $out/bin/wails \
       --prefix PATH : ${lib.makeBinPath [ pkg-config go stdenv.cc nodejs ]} \
-      --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath (lib.optionals stdenv.isLinux [ gtk3 webkitgtk ])}" \
+      --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath (lib.optionals stdenv.hostPlatform.isLinux [ gtk3 webkitgtk ])}" \
       --set PKG_CONFIG_PATH "$PKG_CONFIG_PATH" \
       --set CGO_LDFLAGS "-L${lib.makeLibraryPath [ zlib ]}"
   '';
diff --git a/pkgs/development/tools/wasm-pack/default.nix b/pkgs/development/tools/wasm-pack/default.nix
index 305a4e666c42..42f59dfd8403 100644
--- a/pkgs/development/tools/wasm-pack/default.nix
+++ b/pkgs/development/tools/wasm-pack/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ];
 
-  buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security ++ [ zstd ];
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security ++ [ zstd ];
 
   # Most tests rely on external resources and build artifacts.
   # Disabling check here to work with build sandboxing.
diff --git a/pkgs/development/tools/wasmedge/default.nix b/pkgs/development/tools/wasmedge/default.nix
index 938fcba2da2e..3a6f256339ac 100644
--- a/pkgs/development/tools/wasmedge/default.nix
+++ b/pkgs/development/tools/wasmedge/default.nix
@@ -33,13 +33,13 @@ stdenv.mkDerivation (finalAttrs: {
     llvmPackages.llvm
     libxml2
     libffi
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
   ];
 
   cmakeFlags = [
     "-DWASMEDGE_BUILD_TESTS=OFF" # Tests are downloaded using git
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DWASMEDGE_FORCE_DISABLE_LTO=ON"
   ];
 
diff --git a/pkgs/development/tools/watchman/default.nix b/pkgs/development/tools/watchman/default.nix
index b60872dce673..aa915d89c7fa 100644
--- a/pkgs/development/tools/watchman/default.nix
+++ b/pkgs/development/tools/watchman/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     "-DENABLE_EDEN_SUPPORT=NO" # requires sapling (formerly known as eden), which is not packaged in nixpkgs
     "-DWATCHMAN_STATE_DIR=${stateDir}"
     "-DWATCHMAN_VERSION_OVERRIDE=${version}"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14" # For aligned allocation
   ];
 
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
     lz4
     zstd
     libiconv
-  ] ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   cargoRoot = "watchman/cli";
 
diff --git a/pkgs/development/tools/winhelpcgi/default.nix b/pkgs/development/tools/winhelpcgi/default.nix
index c2d4dd31bf1c..51383b5b792d 100644
--- a/pkgs/development/tools/winhelpcgi/default.nix
+++ b/pkgs/development/tools/winhelpcgi/default.nix
@@ -19,6 +19,6 @@
     license = lib.licenses.gpl2Only;
     maintainers = [ lib.maintainers.shlevy ];
     platforms = lib.platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/development/tools/worker-build/default.nix b/pkgs/development/tools/worker-build/default.nix
index fd7c1e378603..cc48ae31d39b 100644
--- a/pkgs/development/tools/worker-build/default.nix
+++ b/pkgs/development/tools/worker-build/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   buildAndTestSubdir = "worker-build";
 
diff --git a/pkgs/development/tools/wrangler_1/default.nix b/pkgs/development/tools/wrangler_1/default.nix
index 7fc33c2dda6d..570092b7ee48 100644
--- a/pkgs/development/tools/wrangler_1/default.nix
+++ b/pkgs/development/tools/wrangler_1/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ curl CoreFoundation CoreServices Security libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ curl CoreFoundation CoreServices Security libiconv ];
 
   OPENSSL_NO_VENDOR = 1;
 
diff --git a/pkgs/development/tools/wxformbuilder/default.nix b/pkgs/development/tools/wxformbuilder/default.nix
index ad31bcad0d7b..7a5d7a933216 100644
--- a/pkgs/development/tools/wxformbuilder/default.nix
+++ b/pkgs/development/tools/wxformbuilder/default.nix
@@ -37,21 +37,21 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.sigtool
     makeWrapper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     shared-mime-info
   ];
 
   buildInputs = [
     boost
     wxGTK32
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     mv $out/wxFormBuilder.app $out/Applications
     makeWrapper $out/Applications/wxFormBuilder.app/Contents/MacOS/wxFormBuilder $out/bin/wxformbuilder
diff --git a/pkgs/development/tools/xcbuild/default.nix b/pkgs/development/tools/xcbuild/default.nix
index 8dc527c0e1f5..e30700ca2025 100644
--- a/pkgs/development/tools/xcbuild/default.nix
+++ b/pkgs/development/tools/xcbuild/default.nix
@@ -38,7 +38,7 @@ in stdenv.mkDerivation {
     cp -r --no-preserve=all ${linenoise} ThirdParty/linenoise
   '';
 
-  postPatch = lib.optionalString (!stdenv.isDarwin) ''
+  postPatch = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # Fix build on gcc-13 due to missing includes
     sed -e '1i #include <cstdint>' -i \
       Libraries/libutil/Headers/libutil/Permissions.h \
@@ -48,7 +48,7 @@ in stdenv.mkDerivation {
     # Avoid a glibc >= 2.25 deprecation warning that gets fatal via -Werror.
     sed 1i'#include <sys/sysmacros.h>' \
       -i Libraries/xcassets/Headers/xcassets/Slot/SystemVersion.h
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Apple Open Sourced LZFSE, but not libcompression, and it isn't
     # part of an impure framework we can add
     substituteInPlace Libraries/libcar/Sources/Rendition.cpp \
@@ -68,7 +68,7 @@ in stdenv.mkDerivation {
 
   nativeBuildInputs = [ cmake ninja ];
   buildInputs = [ zlib libxml2 libpng ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices CoreGraphics ImageIO ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices CoreGraphics ImageIO ];
 
   meta = with lib; {
     description = "Xcode-compatible build tool";
diff --git a/pkgs/development/tools/xcbuild/platforms.nix b/pkgs/development/tools/xcbuild/platforms.nix
index 0108ac8ef697..333e5471b976 100644
--- a/pkgs/development/tools/xcbuild/platforms.nix
+++ b/pkgs/development/tools/xcbuild/platforms.nix
@@ -48,7 +48,7 @@ let
       ArchitectureSetting = "ARCHS_STANDARD_64_BIT";
     }
     {
-      Identifier = if stdenv.isAarch64 then "arm64" else "x86_64";
+      Identifier = if stdenv.hostPlatform.isAarch64 then "arm64" else "x86_64";
       Type = "Architecture";
       Name = "Apple Silicon or Intel 64-bit";
     }
diff --git a/pkgs/development/tools/xcbuild/toolchains.nix b/pkgs/development/tools/xcbuild/toolchains.nix
index a5e8ed28ce1e..2da12ba7cbcb 100644
--- a/pkgs/development/tools/xcbuild/toolchains.nix
+++ b/pkgs/development/tools/xcbuild/toolchains.nix
@@ -59,7 +59,7 @@ runCommand "Toolchains" {} (''
   ln -s ${buildPackages.gperf}/bin/gperf $toolchain/bin/gperf
   ln -s ${buildPackages.indent}/bin/indent $toolchain/bin/indent
   ln -s ${buildPackages.ctags}/bin/ctags $toolchain/bin/ctags
-'' + optionalString stdenv.isDarwin ''
+'' + optionalString stdenv.hostPlatform.isDarwin ''
   for bin in ${getBin buildPackages.cctools}/bin/*; do
     if ! [ -e "$toolchain/bin/$(basename $bin)" ]; then
       ln -s $bin $toolchain/bin
diff --git a/pkgs/development/web/boa/default.nix b/pkgs/development/web/boa/default.nix
index 122e0df08aa4..9f695ff7d793 100644
--- a/pkgs/development/web/boa/default.nix
+++ b/pkgs/development/web/boa/default.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ bzip2 openssl zstd ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.Security
     ];
diff --git a/pkgs/development/web/bun/default.nix b/pkgs/development/web/bun/default.nix
index c3ff06006b37..6e187aa3fe03 100644
--- a/pkgs/development/web/bun/default.nix
+++ b/pkgs/development/web/bun/default.nix
@@ -18,7 +18,7 @@ stdenvNoCC.mkDerivation rec {
   src = passthru.sources.${stdenvNoCC.hostPlatform.system} or (throw "Unsupported system: ${stdenvNoCC.hostPlatform.system}");
 
   strictDeps = true;
-  nativeBuildInputs = [ unzip installShellFiles ] ++ lib.optionals stdenvNoCC.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = [ unzip installShellFiles ] ++ lib.optionals stdenvNoCC.hostPlatform.isLinux [ autoPatchelfHook ];
   buildInputs = [ openssl ];
 
   dontConfigure = true;
diff --git a/pkgs/development/web/deno/default.nix b/pkgs/development/web/deno/default.nix
index c51adf84f6ee..1dcb7fde0136 100644
--- a/pkgs/development/web/deno/default.nix
+++ b/pkgs/development/web/deno/default.nix
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
     protobuf
     installShellFiles
   ];
-  buildInputs = lib.optionals stdenv.isDarwin (
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (
     [ libiconv darwin.libobjc ]
     ++ (with darwin.apple_sdk_11_0.frameworks; [
       Security
diff --git a/pkgs/development/web/edge-runtime/default.nix b/pkgs/development/web/edge-runtime/default.nix
index 7a51944a4ff3..891c4ca303ca 100644
--- a/pkgs/development/web/edge-runtime/default.nix
+++ b/pkgs/development/web/edge-runtime/default.nix
@@ -33,8 +33,8 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security CoreFoundation SystemConfiguration ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security CoreFoundation SystemConfiguration ]);
 
   # The v8 package will try to download a `librusty_v8.a` release at build time to our read-only filesystem
   # To avoid this we pre-download the file and export it via RUSTY_V8_ARCHIVE
diff --git a/pkgs/development/web/insomnia/default.nix b/pkgs/development/web/insomnia/default.nix
index 9317dbe8f4e9..9b7e05000075 100644
--- a/pkgs/development/web/insomnia/default.nix
+++ b/pkgs/development/web/insomnia/default.nix
@@ -29,7 +29,7 @@ let
     maintainers = with maintainers; [ markus1189 kashw2 DataHearth ];
   };
 in
-if stdenv.isDarwin then stdenv.mkDerivation {
+if stdenv.hostPlatform.isDarwin then stdenv.mkDerivation {
   inherit pname version src meta;
     sourceRoot = ".";
 
diff --git a/pkgs/development/web/kcgi/default.nix b/pkgs/development/web/kcgi/default.nix
index 84bfc654c773..7732ce9f4822 100644
--- a/pkgs/development/web/kcgi/default.nix
+++ b/pkgs/development/web/kcgi/default.nix
@@ -16,14 +16,14 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ ] ++ lib.optionals stdenv.isLinux [ libbsd ] ;
+  buildInputs = [ ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libbsd ] ;
 
   dontAddPrefix = true;
 
   installFlags = [ "DESTDIR=$(out)" ];
 
   meta = with lib; {
-    broken = (stdenv.isLinux && stdenv.isAarch64);
+    broken = (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
     homepage = "https://kristaps.bsd.lv/kcgi";
     description = "Minimal CGI and FastCGI library for C/C++";
     license = licenses.isc;
diff --git a/pkgs/development/web/netlify-cli/composition.nix b/pkgs/development/web/netlify-cli/composition.nix
index 2e54104d7dce..4bd736ddc723 100644
--- a/pkgs/development/web/netlify-cli/composition.nix
+++ b/pkgs/development/web/netlify-cli/composition.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ./node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/pkgs/development/web/netlify-cli/node-env.nix b/pkgs/development/web/netlify-cli/node-env.nix
index bc1e36628ac8..eb94495aeba3 100644
--- a/pkgs/development/web/netlify-cli/node-env.nix
+++ b/pkgs/development/web/netlify-cli/node-env.nix
@@ -499,8 +499,8 @@ let
     stdenv.mkDerivation ({
       name = "${name}${if version == null then "" else "-${version}"}";
       buildInputs = [ tarWrapper python nodejs ]
-        ++ lib.optional (stdenv.isLinux) utillinux
-        ++ lib.optional (stdenv.isDarwin) libtool
+        ++ lib.optional (stdenv.hostPlatform.isLinux) utillinux
+        ++ lib.optional (stdenv.hostPlatform.isDarwin) libtool
         ++ buildInputs;
 
       inherit nodejs;
@@ -591,8 +591,8 @@ let
         name = "node-dependencies-${name}${if version == null then "" else "-${version}"}";
 
         buildInputs = [ tarWrapper python nodejs ]
-          ++ lib.optional (stdenv.isLinux) utillinux
-          ++ lib.optional (stdenv.isDarwin) libtool
+          ++ lib.optional (stdenv.hostPlatform.isLinux) utillinux
+          ++ lib.optional (stdenv.hostPlatform.isDarwin) libtool
           ++ buildInputs;
 
         inherit dontStrip; # Stripping may fail a build for some package deployments
@@ -662,7 +662,7 @@ let
     stdenv.mkDerivation ({
       name = "node-shell-${name}${if version == null then "" else "-${version}"}";
 
-      buildInputs = [ python nodejs ] ++ lib.optional (stdenv.isLinux) utillinux ++ buildInputs;
+      buildInputs = [ python nodejs ] ++ lib.optional (stdenv.hostPlatform.isLinux) utillinux ++ buildInputs;
       buildCommand = ''
         mkdir -p $out/bin
         cat > $out/bin/shell <<EOF
diff --git a/pkgs/development/web/netlify-cli/test.nix b/pkgs/development/web/netlify-cli/test.nix
index d25c6c48936b..5acd4f1046d5 100644
--- a/pkgs/development/web/netlify-cli/test.nix
+++ b/pkgs/development/web/netlify-cli/test.nix
@@ -11,7 +11,7 @@ runCommand "netlify-cli-test" {
   nativeBuildInputs = [
     netlify-cli
     curl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.ps
   ];
   meta.timeout = 600;
diff --git a/pkgs/development/web/postman/default.nix b/pkgs/development/web/postman/default.nix
index f9684f64feeb..ae2ea6f86230 100644
--- a/pkgs/development/web/postman/default.nix
+++ b/pkgs/development/web/postman/default.nix
@@ -14,6 +14,6 @@ let
 
 in
 
-if stdenvNoCC.isDarwin
+if stdenvNoCC.hostPlatform.isDarwin
 then callPackage ./darwin.nix { inherit pname version meta; }
 else callPackage ./linux.nix { inherit pname version meta; }
diff --git a/pkgs/games/7kaa/default.nix b/pkgs/games/7kaa/default.nix
index e28eca772aa9..2dd4d6722153 100644
--- a/pkgs/games/7kaa/default.nix
+++ b/pkgs/games/7kaa/default.nix
@@ -54,7 +54,7 @@ gccStdenv.mkDerivation (finalAttrs: {
     autoupdate
   '';
 
-  hardeningDisable = lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [ "stackprotector" ];
+  hardeningDisable = lib.optionals (stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isDarwin) [ "stackprotector" ];
 
   postInstall = ''
     mkdir $out/share/7kaa/MUSIC
diff --git a/pkgs/games/abuse/default.nix b/pkgs/games/abuse/default.nix
index cd3587a244e0..6b46e61aaf1a 100644
--- a/pkgs/games/abuse/default.nix
+++ b/pkgs/games/abuse/default.nix
@@ -59,6 +59,6 @@ stdenv.mkDerivation (finalAttrs: {
     # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648272
     maintainers = with lib.maintainers; [ iblech ];
     platforms   = lib.platforms.unix;
-    broken      = stdenv.isDarwin;
+    broken      = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/games/anki/bin.nix b/pkgs/games/anki/bin.nix
index a75cc801257e..8daf97caf56b 100644
--- a/pkgs/games/anki/bin.nix
+++ b/pkgs/games/anki/bin.nix
@@ -115,13 +115,13 @@ let
   );
 in
 
-if stdenv.isLinux then
+if stdenv.hostPlatform.isLinux then
   fhsEnvAnki
 else
   stdenv.mkDerivation {
     inherit pname version passthru;
 
-    src = if stdenv.isAarch64 then sources.darwin-aarch64 else sources.darwin-x86_64;
+    src = if stdenv.hostPlatform.isAarch64 then sources.darwin-aarch64 else sources.darwin-x86_64;
 
     nativeBuildInputs = [ undmg ];
     sourceRoot = ".";
diff --git a/pkgs/games/anki/default.nix b/pkgs/games/anki/default.nix
index 76c23365f400..d9a4984d3d79 100644
--- a/pkgs/games/anki/default.nix
+++ b/pkgs/games/anki/default.nix
@@ -152,12 +152,12 @@ python3.pkgs.buildPythonApplication {
     qt6.wrapQtAppsHook
     rsync
     rustPlatform.cargoSetupHook
-  ] ++ lib.optional stdenv.isDarwin swift;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin swift;
 
   buildInputs = [
     qt6.qtbase
     qt6.qtsvg
-  ] ++ lib.optional stdenv.isLinux qt6.qtwayland;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux qt6.qtwayland;
 
   propagatedBuildInputs =
     with python3.pkgs;
@@ -213,7 +213,7 @@ python3.pkgs.buildPythonApplication {
       wrapt
       zipp
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       AVKit
       CoreAudio
     ];
@@ -226,7 +226,7 @@ python3.pkgs.buildPythonApplication {
 
   # tests fail with to many open files
   # TODO: verify if this is still true (I can't, no mac)
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkFlags = [
     # these two tests are flaky, see https://github.com/ankitects/anki/issues/3353
@@ -344,6 +344,6 @@ python3.pkgs.buildPythonApplication {
       oxij
     ];
     # Reported to crash at launch on darwin (as of 2.1.65)
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/games/anki/sync-server.nix b/pkgs/games/anki/sync-server.nix
index 8dc73e405afd..0b351ae3ffad 100644
--- a/pkgs/games/anki/sync-server.nix
+++ b/pkgs/games/anki/sync-server.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/games/arx-libertatis/default.nix b/pkgs/games/arx-libertatis/default.nix
index 334219a28901..9dbe2ce7a7df 100644
--- a/pkgs/games/arx-libertatis/default.nix
+++ b/pkgs/games/arx-libertatis/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, cmake, zlib, boost
 , openal, glm, freetype, libGLU, SDL2, libepoxy
 , dejavu_fonts, inkscape, optipng, imagemagick
-, withCrashReporter ? !stdenv.isDarwin
+, withCrashReporter ? !stdenv.hostPlatform.isDarwin
 ,   qtbase ? null
 ,   wrapQtAppsHook ? null
 ,   curl ? null
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     zlib boost openal glm
     freetype libGLU SDL2 libepoxy
   ] ++ optionals withCrashReporter [ qtbase curl ]
-    ++ optionals stdenv.isLinux    [ gdb ];
+    ++ optionals stdenv.hostPlatform.isLinux    [ gdb ];
 
   cmakeFlags = [
     "-DDATA_DIR_PREFIXES=$out/share"
diff --git a/pkgs/games/augustus/default.nix b/pkgs/games/augustus/default.nix
index bf360d2dcb94..5b94777dea69 100644
--- a/pkgs/games/augustus/default.nix
+++ b/pkgs/games/augustus/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs =
     [ cmake ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.sigtool
       libicns
       imagemagick
@@ -36,9 +36,9 @@ stdenv.mkDerivation rec {
     SDL2
     SDL2_mixer
     libpng
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
 
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     runHook preInstall
     mkdir -p $out/Applications
     cp -r augustus.app $out/Applications/
diff --git a/pkgs/games/blightmud/default.nix b/pkgs/games/blightmud/default.nix
index ee69fc697b31..b5ebd8c279ee 100644
--- a/pkgs/games/blightmud/default.nix
+++ b/pkgs/games/blightmud/default.nix
@@ -31,10 +31,10 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals (withTTS && stdenv.isLinux) [ speechd-minimal ]
-    ++ lib.optionals stdenv.isLinux [ alsa-lib ]
-    ++ lib.optionals (withTTS && stdenv.isDarwin) [ AVFoundation AppKit ]
-    ++ lib.optionals stdenv.isDarwin [ CoreAudio AudioUnit ];
+    ++ lib.optionals (withTTS && stdenv.hostPlatform.isLinux) [ speechd-minimal ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib ]
+    ++ lib.optionals (withTTS && stdenv.hostPlatform.isDarwin) [ AVFoundation AppKit ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreAudio AudioUnit ];
 
   checkFlags =
     let
diff --git a/pkgs/games/bzflag/default.nix b/pkgs/games/bzflag/default.nix
index 400fa33e6862..9b20252feffa 100644
--- a/pkgs/games/bzflag/default.nix
+++ b/pkgs/games/bzflag/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ curl SDL2 libGLU libGL glew ncurses c-ares ]
-    ++ lib.optionals stdenv.isDarwin [ Carbon CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon CoreServices ];
 
   meta = with lib; {
     description = "Multiplayer 3D Tank game";
diff --git a/pkgs/games/cataclysm-dda/common.nix b/pkgs/games/cataclysm-dda/common.nix
index f18d2cc37550..268f5d5256d2 100644
--- a/pkgs/games/cataclysm-dda/common.nix
+++ b/pkgs/games/cataclysm-dda/common.nix
@@ -8,10 +8,10 @@ let
   inherit (lib) optionals optionalString;
 
   cursesDeps = [ gettext ncurses ]
-    ++ optionals stdenv.isDarwin [ CoreFoundation ];
+    ++ optionals stdenv.hostPlatform.isDarwin [ CoreFoundation ];
 
   tilesDeps = [ SDL2 SDL2_image SDL2_mixer SDL2_ttf freetype ]
-    ++ optionals stdenv.isDarwin [ Cocoa ];
+    ++ optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   patchDesktopFile = ''
     substituteInPlace $out/share/applications/org.cataclysmdda.CataclysmDDA.desktop \
@@ -50,14 +50,14 @@ stdenv.mkDerivation {
     "RELEASE=1"
   ] ++ optionals tiles [
     "TILES=1" "SOUND=1"
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     "NATIVE=osx"
     "CLANG=1"
     "OSX_MIN=${stdenv.hostPlatform.darwinMinVersion}"
   ];
 
   postInstall = optionalString tiles
-  ( if !stdenv.isDarwin
+  ( if !stdenv.hostPlatform.isDarwin
     then patchDesktopFile
     else installMacOSAppLauncher
   );
diff --git a/pkgs/games/cdogs-sdl/default.nix b/pkgs/games/cdogs-sdl/default.nix
index 492a4216df41..7909bc476e7e 100644
--- a/pkgs/games/cdogs-sdl/default.nix
+++ b/pkgs/games/cdogs-sdl/default.nix
@@ -59,6 +59,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Only;
     maintainers = with maintainers; [ nixinator ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/cdogs-sdl.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/cdogs-sdl.x86_64-darwin
   };
 }
diff --git a/pkgs/games/chiaki/default.nix b/pkgs/games/chiaki/default.nix
index ed1867aeffc1..6ff93f4d47e5 100644
--- a/pkgs/games/chiaki/default.nix
+++ b/pkgs/games/chiaki/default.nix
@@ -44,10 +44,10 @@ mkDerivation rec {
     qtsvg
     protobuf
     SDL2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libevdev
     udev
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     qtmacextras
   ];
 
diff --git a/pkgs/games/corsix-th/default.nix b/pkgs/games/corsix-th/default.nix
index f55a9a20b328..8e393904b920 100644
--- a/pkgs/games/corsix-th/default.nix
+++ b/pkgs/games/corsix-th/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation(finalAttrs: {
     SDL2
     SDL2_mixer
     timidity
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Cocoa
     CoreVideo
@@ -53,11 +53,11 @@ stdenv.mkDerivation(finalAttrs: {
 
   cmakeFlags = [ "-Wno-dev" ];
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/corsix-th \
     --set LUA_PATH "$LUA_PATH" \
     --set LUA_CPATH "$LUA_CPATH"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/CorsixTH.app $out/Applications
     wrapProgram $out/Applications/CorsixTH.app/Contents/MacOS/CorsixTH \
diff --git a/pkgs/games/crawl/default.nix b/pkgs/games/crawl/default.nix
index 9fb11b07be6f..ba764d1a6a37 100644
--- a/pkgs/games/crawl/default.nix
+++ b/pkgs/games/crawl/default.nix
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     ++ (with python3.pkgs; [ pyyaml ])
     ++ lib.optionals tileMode [ libpng SDL2 SDL2_image freetype libGLU libGL ]
     ++ lib.optional enableSound SDL2_mixer
-    ++ (lib.optionals stdenv.isDarwin (
+    ++ (lib.optionals stdenv.hostPlatform.isDarwin (
     with darwin.apple_sdk.frameworks; [
       AppKit
       AudioUnit
diff --git a/pkgs/games/cutemaze/default.nix b/pkgs/games/cutemaze/default.nix
index 658511b02dad..2a1f194f5c0d 100644
--- a/pkgs/games/cutemaze/default.nix
+++ b/pkgs/games/cutemaze/default.nix
@@ -27,11 +27,11 @@ stdenv.mkDerivation rec {
   buildInputs = [
     qtbase
     qtsvg
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     runHook preInstall
 
     mkdir -p $out/Applications
diff --git a/pkgs/games/ddnet/default.nix b/pkgs/games/ddnet/default.nix
index 7356e9395d76..baeabd63ebe4 100644
--- a/pkgs/games/ddnet/default.nix
+++ b/pkgs/games/ddnet/default.nix
@@ -83,9 +83,9 @@ stdenv.mkDerivation rec {
     vulkan-headers
     glslang
     spirv-tools
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Carbon
     Cocoa
     OpenGL
@@ -110,7 +110,7 @@ stdenv.mkDerivation rec {
   ];
 
   # Tests loop forever on Darwin for some reason
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   checkTarget = "run_tests";
 
   postInstall = lib.optionalString (!buildClient) ''
diff --git a/pkgs/games/devilutionx/default.nix b/pkgs/games/devilutionx/default.nix
index e26a77e57a09..c8d2102728b2 100644
--- a/pkgs/games/devilutionx/default.nix
+++ b/pkgs/games/devilutionx/default.nix
@@ -106,7 +106,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     runHook preInstall
 
-  '' + (if stdenv.isDarwin then ''
+  '' + (if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
     mv devilutionx.app $out/Applications
   '' else ''
diff --git a/pkgs/games/doom-ports/doomseeker/default.nix b/pkgs/games/doom-ports/doomseeker/default.nix
index 6f83fa130459..25c536230a6c 100644
--- a/pkgs/games/doom-ports/doomseeker/default.nix
+++ b/pkgs/games/doom-ports/doomseeker/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ wrapQtAppsHook cmake qttools pkg-config xxd ];
   buildInputs = [ qtbase qtmultimedia zlib bzip2 ];
 
-  hardeningDisable = lib.optional stdenv.isDarwin "format";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isDarwin "format";
 
   # Doomseeker looks for the engines in the program directory
   postInstall = ''
diff --git a/pkgs/games/doom-ports/odamex/default.nix b/pkgs/games/doom-ports/odamex/default.nix
index fb3b9a2fda4f..b813fc0e1c41 100644
--- a/pkgs/games/doom-ports/odamex/default.nix
+++ b/pkgs/games/doom-ports/odamex/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
-  '' + (if stdenv.isDarwin then ''
+  '' + (if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/{Applications,bin}
     mv odalaunch/odalaunch.app $out/Applications
     makeWrapper $out/{Applications/odalaunch.app/Contents/MacOS,bin}/odalaunch
diff --git a/pkgs/games/doom-ports/zandronum/fmod.nix b/pkgs/games/doom-ports/zandronum/fmod.nix
index 59075d69c753..0d965cb71724 100644
--- a/pkgs/games/doom-ports/zandronum/fmod.nix
+++ b/pkgs/games/doom-ports/zandronum/fmod.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   version = "4.44.64";
   shortVersion = builtins.replaceStrings [ "." ] [ "" ] version;
 
-  src = fetchurl (if stdenv.isLinux then {
+  src = fetchurl (if stdenv.hostPlatform.isLinux then {
     url = "https://zdoom.org/files/fmod/fmodapi${shortVersion}linux.tar.gz";
     sha256 = "047hk92xapwwqj281f4zwl0ih821rrliya70gfj82sdfjh9lz8i1";
   } else {
@@ -24,11 +24,11 @@ stdenv.mkDerivation rec {
   dontPatchELF = true;
   dontBuild = true;
 
-  installPhase = lib.optionalString stdenv.isLinux ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isLinux ''
     install -Dm755 api/lib/libfmodex${bits}-${version}.so $out/lib/libfmodex-${version}.so
     ln -s libfmodex-${version}.so $out/lib/libfmodex.so
     patchelf --set-rpath ${libPath} $out/lib/libfmodex.so
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install -D api/lib/libfmodex.dylib $out/lib/libfmodex.dylib
     install -D api/lib/libfmodexL.dylib $out/lib/libfmodexL.dylib
   '' + ''
diff --git a/pkgs/games/dwarf-fortress/default.nix b/pkgs/games/dwarf-fortress/default.nix
index e5bbf60e1550..72ca14578bae 100644
--- a/pkgs/games/dwarf-fortress/default.nix
+++ b/pkgs/games/dwarf-fortress/default.nix
@@ -49,8 +49,8 @@ let
   # The latest Dwarf Fortress version. Maintainers: when a new version comes
   # out, ensure that (unfuck|dfhack|twbt) are all up to date before changing
   # this. Note that unfuck and twbt are not required for 50.
-  latestVersion = if stdenv.isLinux then "50.13"
-                  else if stdenv.isDarwin then "0.47.05"
+  latestVersion = if stdenv.hostPlatform.isLinux then "50.13"
+                  else if stdenv.hostPlatform.isDarwin then "0.47.05"
                   else throw "Unsupported system";
 
   # Converts a version to a package name.
@@ -64,7 +64,7 @@ let
         let
           isAtLeast50 = versionAtLeast dfVersion "50.0";
 
-          dwarf-fortress-unfuck = optionalAttrs (!isAtLeast50 && stdenv.isLinux) (callPackage ./unfuck.nix { inherit dfVersion; });
+          dwarf-fortress-unfuck = optionalAttrs (!isAtLeast50 && stdenv.hostPlatform.isLinux) (callPackage ./unfuck.nix { inherit dfVersion; });
 
           dwarf-fortress = callPackage ./game.nix {
             inherit dfVersion;
diff --git a/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix b/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix
index 845aae0815e2..1c3e05e92368 100644
--- a/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix
+++ b/pkgs/games/dwarf-fortress/dwarf-therapist/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [ "-GNinja" ];
 
   installPhase =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       mkdir -p $out/Applications
       cp -r DwarfTherapist.app $out/Applications
     '' else null;
diff --git a/pkgs/games/dwarf-fortress/game.nix b/pkgs/games/dwarf-fortress/game.nix
index 1aefe5b642a2..02dfd89f636d 100644
--- a/pkgs/games/dwarf-fortress/game.nix
+++ b/pkgs/games/dwarf-fortress/game.nix
@@ -67,7 +67,7 @@ let
     if hasAttr dfPlatform game
     then getAttr dfPlatform game
     else throw "Unsupported dfPlatform: ${dfPlatform}";
-  exe = if stdenv.isLinux then
+  exe = if stdenv.hostPlatform.isLinux then
     if baseVersion >= 50 then "dwarfort" else "libs/Dwarf_Fortress"
   else
     "dwarfort.exe";
@@ -86,8 +86,8 @@ stdenv.mkDerivation {
 
   postUnpack = ''
     directory=${
-      if stdenv.isLinux then "df_linux"
-      else if stdenv.isDarwin then "df_osx"
+      if stdenv.hostPlatform.isLinux then "df_linux"
+      else if stdenv.hostPlatform.isDarwin then "df_osx"
       else throw "Unsupported system"
     }
     if [ -d "$directory" ]; then
@@ -95,7 +95,7 @@ stdenv.mkDerivation {
     fi
   '';
 
-  nativeBuildInputs = optional stdenv.isLinux autoPatchelfHook;
+  nativeBuildInputs = optional stdenv.hostPlatform.isLinux autoPatchelfHook;
   buildInputs = optionals isAtLeast50 [ SDL2 SDL2_image SDL2_mixer ]
     ++ optional (!isAtLeast50) SDL
     ++ optional enableUnfuck dwarf-fortress-unfuck
@@ -124,7 +124,7 @@ stdenv.mkDerivation {
     # Store the original hash
     md5sum $exe | awk '{ print $1 }' > $out/hash.md5.orig
     echo "Original MD5: $(<$out/hash.md5.orig)" >&2
-  '' + optionalString stdenv.isDarwin ''
+  '' + optionalString stdenv.hostPlatform.isDarwin ''
     # My custom unfucked dwarfort.exe for macOS. Can't use
     # absolute paths because original doesn't have enough
     # header space. Someone plz break into Tarn's house & put
diff --git a/pkgs/games/dwarf-fortress/lazy-pack.nix b/pkgs/games/dwarf-fortress/lazy-pack.nix
index c94a46f04d9e..eef830965eb4 100644
--- a/pkgs/games/dwarf-fortress/lazy-pack.nix
+++ b/pkgs/games/dwarf-fortress/lazy-pack.nix
@@ -9,7 +9,7 @@
   # This package should, at any given time, provide an opinionated "optimal"
   # DF experience. It's the equivalent of the Lazy Newbie Pack, that is, and
   # should contain every utility available unless you disable them.
-, enableDFHack ? stdenvNoCC.isLinux
+, enableDFHack ? stdenvNoCC.hostPlatform.isLinux
 , enableTWBT ? enableDFHack
 , enableSoundSense ? true
 , enableStoneSense ? true
diff --git a/pkgs/games/dwarf-fortress/wrapper/default.nix b/pkgs/games/dwarf-fortress/wrapper/default.nix
index daa27ce5dc00..268a5c1f5da5 100644
--- a/pkgs/games/dwarf-fortress/wrapper/default.nix
+++ b/pkgs/games/dwarf-fortress/wrapper/default.nix
@@ -197,8 +197,8 @@ stdenv.mkDerivation rec {
     chmod 755 $out/bin/soundsense
   '';
 
-  doInstallCheck = stdenv.isLinux;
-  nativeInstallCheckInputs = lib.optionals stdenv.isLinux [ expect xvfb-run ];
+  doInstallCheck = stdenv.hostPlatform.isLinux;
+  nativeInstallCheckInputs = lib.optionals stdenv.hostPlatform.isLinux [ expect xvfb-run ];
 
   installCheckPhase = let
     commonExpectStatements = fmod: lib.optionalString isAtLeast50 ''
diff --git a/pkgs/games/ecwolf/default.nix b/pkgs/games/ecwolf/default.nix
index 8bbbc53a0dcd..77ccc9a929c3 100644
--- a/pkgs/games/ecwolf/default.nix
+++ b/pkgs/games/ecwolf/default.nix
@@ -25,16 +25,16 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake pkg-config ]
-    ++ lib.optionals stdenv.isDarwin [ makeWrapper ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ makeWrapper ];
   buildInputs = [ zlib bzip2 libjpeg SDL2 SDL2_net SDL2_mixer gtk3 ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework AppKit";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework AppKit";
 
   # ECWolf installs its binary to the games/ directory, but Nix only adds bin/
   # directories to the PATH.
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mv "$out/games" "$out/bin"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/{Applications,bin}
     cp -R ecwolf.app $out/Applications
     makeWrapper $out/{Applications/ecwolf.app/Contents/MacOS,bin}/ecwolf
diff --git a/pkgs/games/eduke32/default.nix b/pkgs/games/eduke32/default.nix
index 740d0bc47ea7..c213a6317b10 100644
--- a/pkgs/games/eduke32/default.nix
+++ b/pkgs/games/eduke32/default.nix
@@ -49,11 +49,11 @@ in stdenv.mkDerivation (finalAttrs: {
     libvpx
     SDL2
     SDL2_mixer
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     gtk2
     libGL
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AGL
     Cocoa
     GLUT
@@ -74,7 +74,7 @@ in stdenv.mkDerivation (finalAttrs: {
       --replace-fail '#include <SDL.h>' '#include <SDL2/SDL.h>' \
       --replace-fail '#include <SDL_syswm.h>' '#include <SDL2/SDL_syswm.h>' \
       --replace-fail '#include <SDL_vulkan.h>' '#include <SDL2/SDL_vulkan.h>'
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in glad.c glad_wgl.c ; do
       substituteInPlace source/glad/src/$f \
         --replace-fail libGL.so ${libGL}/lib/libGL.so
@@ -117,7 +117,7 @@ in stdenv.mkDerivation (finalAttrs: {
     runHook preInstall
 
     install -Dm755 -t $out/bin eduke32 mapster32 voidsw wangulator
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     makeWrapper $out/bin/eduke32 $out/bin/${wrapper} \
       --set-default EDUKE32_DATA_DIR /var/lib/games/eduke32 \
       --add-flags '-g "$EDUKE32_DATA_DIR/DUKE3D.GRP"'
@@ -127,7 +127,7 @@ in stdenv.mkDerivation (finalAttrs: {
     mkdir -p $out/share/icons/hicolor/scalable/apps
     gm convert "./source/duke3d/rsrc/game_icon.ico[10]" $out/share/icons/hicolor/scalable/apps/eduke32.png
     install -Dm644 ./source/sw/rsrc/game_icon.svg $out/share/icons/hicolor/scalable/apps/voidsw.svg
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications/EDuke32.app/Contents/MacOS
     mkdir -p $out/Applications/Mapster32.app/Contents/MacOS
     mkdir -p $out/Applications/VoidSW.app/Contents/MacOS
diff --git a/pkgs/games/ferium/default.nix b/pkgs/games/ferium/default.nix
index 294421527d72..08710c42214d 100644
--- a/pkgs/games/ferium/default.nix
+++ b/pkgs/games/ferium/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-eeQjezB6pRdnPADLgDLo8b+bUSP12gfBhFNt/uYCwHU=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   cargoHash = "sha256-yBi6zyljkYEIUvSH4nXMw8fjPnt4kjqiuZ/QLT5IbqQ=";
 
diff --git a/pkgs/games/fheroes2/default.nix b/pkgs/games/fheroes2/default.nix
index bc87f453d32b..c505970c964f 100644
--- a/pkgs/games/fheroes2/default.nix
+++ b/pkgs/games/fheroes2/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ imagemagick ];
 
   buildInputs = [ gettext glibcLocalesUtf8 libpng SDL2 SDL2_image SDL2_mixer SDL2_ttf zlib ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   makeFlags = [
     "FHEROES2_STRICT_COMPILATION=1"
diff --git a/pkgs/games/flare/engine.nix b/pkgs/games/flare/engine.nix
index a1f8761815aa..b404e8ecfcd0 100644
--- a/pkgs/games/flare/engine.nix
+++ b/pkgs/games/flare/engine.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ SDL2 SDL2_image SDL2_mixer SDL2_ttf ]
-    ++ lib.optional stdenv.isDarwin Cocoa;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   meta = with lib; {
     description = "Free/Libre Action Roleplaying Engine";
diff --git a/pkgs/games/freeciv/default.nix b/pkgs/games/freeciv/default.nix
index 47dfb0840509..1a0cb892dcea 100644
--- a/pkgs/games/freeciv/default.nix
+++ b/pkgs/games/freeciv/default.nix
@@ -83,6 +83,6 @@ stdenv.mkDerivation rec {
     maintainers = with lib.maintainers; [ pierron ];
     platforms = lib.platforms.unix;
     hydraPlatforms = lib.platforms.linux; # sdl-config times out on darwin
-    broken = qtClient && stdenv.isDarwin; # Missing Qt5 development files
+    broken = qtClient && stdenv.hostPlatform.isDarwin; # Missing Qt5 development files
   };
 }
diff --git a/pkgs/games/freedroid/default.nix b/pkgs/games/freedroid/default.nix
index a3aba7313111..130b02997b59 100644
--- a/pkgs/games/freedroid/default.nix
+++ b/pkgs/games/freedroid/default.nix
@@ -49,6 +49,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ iblech ];
     platforms   = platforms.unix;
     # Builds but fails to render to the screen at runtime.
-    broken      = stdenv.isDarwin;
+    broken      = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/games/freedroidrpg/default.nix b/pkgs/games/freedroidrpg/default.nix
index b41b91855ee0..8c9b3e0cbf0d 100644
--- a/pkgs/games/freedroidrpg/default.nix
+++ b/pkgs/games/freedroidrpg/default.nix
@@ -20,7 +20,7 @@ in stdenv.mkDerivation {
 
   buildInputs = [
     glew SDL SDL_image SDL_gfx SDL_mixer libogg libvorbis lua5_3 libjpeg libpng zlib
-  ] ++ lib.optional stdenv.isDarwin libiconv;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/games/freenukum/default.nix b/pkgs/games/freenukum/default.nix
index af202ffd528d..e0f90773810e 100644
--- a/pkgs/games/freenukum/default.nix
+++ b/pkgs/games/freenukum/default.nix
@@ -69,6 +69,6 @@ rustPlatform.buildRustPackage rec {
     changelog = "https://salsa.debian.org/silwol/freenukum/-/blob/v${version}/CHANGELOG.md";
     license = licenses.agpl3Plus;
     maintainers = with maintainers; [ _0x4A6F ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/games/gargoyle/default.nix b/pkgs/games/gargoyle/default.nix
index 35b8dc733031..d7863361b846 100644
--- a/pkgs/games/gargoyle/default.nix
+++ b/pkgs/games/gargoyle/default.nix
@@ -5,7 +5,7 @@ let
 
   jamenv = ''
     unset AR
-  '' + (if stdenv.isDarwin then ''
+  '' + (if stdenv.hostPlatform.isDarwin then ''
     export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${lib.getDev SDL}/include/SDL"
     export GARGLKINI="$out/Applications/Gargoyle.app/Contents/Resources/garglk.ini"
   '' else ''
@@ -30,10 +30,10 @@ stdenv.mkDerivation rec {
     sha256 = "0w54avmbp4i4zps2rb4acmpa641s6wvwbrln4vbdhcz97fx48nzz";
   };
 
-  nativeBuildInputs = [ jam pkg-config ] ++ lib.optional stdenv.isDarwin cctools;
+  nativeBuildInputs = [ jam pkg-config ] ++ lib.optional stdenv.hostPlatform.isDarwin cctools;
 
   buildInputs = [ SDL SDL_mixer SDL_sound gtk2 ]
-    ++ lib.optionals stdenv.isDarwin [ smpeg libvorbis ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ smpeg libvorbis ];
 
   # Workaround build failure on -fno-common toolchains:
   #   ld: build/linux.release/alan3/Location.o:(.bss+0x0): multiple definition of
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   buildPhase = jamenv + "jam -j$NIX_BUILD_CORES";
 
   installPhase =
-  if stdenv.isDarwin then
+  if stdenv.hostPlatform.isDarwin then
   (substituteAll {
     inherit (stdenv) shell;
     isExecutable = true;
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "http://ccxvii.net/gargoyle/";
     license = licenses.gpl2Plus;
     description = "Interactive fiction interpreter GUI";
diff --git a/pkgs/games/gemrb/default.nix b/pkgs/games/gemrb/default.nix
index 5906fb6f1cd8..85ea2954309e 100644
--- a/pkgs/games/gemrb/default.nix
+++ b/pkgs/games/gemrb/default.nix
@@ -20,7 +20,7 @@ let
   backend =
     if stdenv.hostPlatform.isx86 then "OpenGL" else "GLES";
 
-  withVLC = stdenv.isDarwin;
+  withVLC = stdenv.hostPlatform.isDarwin;
 
   inherit (lib) optional optionalString;
 
diff --git a/pkgs/games/gmad/default.nix b/pkgs/games/gmad/default.nix
index 97538679ee59..799609856137 100644
--- a/pkgs/games/gmad/default.nix
+++ b/pkgs/games/gmad/default.nix
@@ -22,8 +22,8 @@ stdenv.mkDerivation rec {
   buildInputs = [ premake4 bootil ];
 
   targetName =
-    if stdenv.isLinux then "gmad_linux"
-    else if stdenv.isDarwin then "gmad_osx"
+    if stdenv.hostPlatform.isLinux then "gmad_linux"
+    else if stdenv.hostPlatform.isDarwin then "gmad_osx"
     else "gmad";
 
   premakeFlags = [ "--bootil_lib=${bootil}/lib" "--bootil_inc=${bootil}/include" ];
diff --git a/pkgs/games/gtypist/default.nix b/pkgs/games/gtypist/default.nix
index 169b0fa77db0..4d9fe630ca42 100644
--- a/pkgs/games/gtypist/default.nix
+++ b/pkgs/games/gtypist/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = [ ncurses perl fortune ]
-   ++ lib.optional stdenv.isDarwin libiconv;
+   ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   preFixup = ''
      wrapProgram "$out/bin/typefortune" \
diff --git a/pkgs/games/hedgewars/default.nix b/pkgs/games/hedgewars/default.nix
index 351dd15c417f..389beb7b51c8 100644
--- a/pkgs/games/hedgewars/default.nix
+++ b/pkgs/games/hedgewars/default.nix
@@ -88,7 +88,7 @@ stdenv.mkDerivation rec {
        hedgehog or hedgehogs after a player's or CPU turn is shown only when
        all movement on the battlefield has ceased).'';
     maintainers = with maintainers; [ kragniz fpletz ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     platforms = platforms.linux;
   };
 }
diff --git a/pkgs/games/hheretic/default.nix b/pkgs/games/hheretic/default.nix
index 6e4be6bd54b7..83b0ccb620cf 100644
--- a/pkgs/games/hheretic/default.nix
+++ b/pkgs/games/hheretic/default.nix
@@ -52,6 +52,6 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "hheretic-gl";
     maintainers = with lib.maintainers; [ moody ];
     inherit (SDL.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/games/hhexen/default.nix b/pkgs/games/hhexen/default.nix
index 0e5345e85a7d..c73040a30f7e 100644
--- a/pkgs/games/hhexen/default.nix
+++ b/pkgs/games/hhexen/default.nix
@@ -52,6 +52,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ moody djanatyn ];
     mainProgram = "hhexen-gl";
     inherit (SDL.meta) platforms;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/games/hmcl/default.nix b/pkgs/games/hmcl/default.nix
index 69b546183406..7a330c399272 100644
--- a/pkgs/games/hmcl/default.nix
+++ b/pkgs/games/hmcl/default.nix
@@ -75,7 +75,7 @@ stdenv.mkDerivation (finalAttrs: {
           glib
           openal
           libglvnd
-        ] ++ lib.optionals stdenv.isLinux [
+        ] ++ lib.optionals stdenv.hostPlatform.isLinux [
           xorg.libX11
           xorg.libXxf86vm
           xorg.libXext
diff --git a/pkgs/games/ja2-stracciatella/default.nix b/pkgs/games/ja2-stracciatella/default.nix
index ea363c969429..9ad6e3105406 100644
--- a/pkgs/games/ja2-stracciatella/default.nix
+++ b/pkgs/games/ja2-stracciatella/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
   inherit src version;
 
   nativeBuildInputs = [ cmake python3 ];
-  buildInputs = [ SDL2 fltk rapidjson gtest ] ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa ];
+  buildInputs = [ SDL2 fltk rapidjson gtest ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa ];
 
   patches = [
     ./remove-rust-buildstep.patch
diff --git a/pkgs/games/jfsw/default.nix b/pkgs/games/jfsw/default.nix
index ed82964e4d0e..181b28e06c9d 100644
--- a/pkgs/games/jfsw/default.nix
+++ b/pkgs/games/jfsw/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.gpl2Plus;
     mainProgram = "sw";
     maintainers = with lib.maintainers; [ moody ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     inherit (SDL2.meta) platforms;
   };
 })
diff --git a/pkgs/games/julius/default.nix b/pkgs/games/julius/default.nix
index 69f3c34a1f0f..f5f5bb6d1eb4 100644
--- a/pkgs/games/julius/default.nix
+++ b/pkgs/games/julius/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.sigtool
     libicns
     imagemagick
@@ -38,11 +38,11 @@ stdenv.mkDerivation rec {
     SDL2
     SDL2_mixer
     libpng
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     runHook preInstall
     mkdir -p $out/Applications
     cp -r julius.app $out/Applications/
diff --git a/pkgs/games/jumpy/default.nix b/pkgs/games/jumpy/default.nix
index 23e130582a3d..7040aa4e3401 100644
--- a/pkgs/games/jumpy/default.nix
+++ b/pkgs/games/jumpy/default.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     zstd
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
     libxkbcommon
     udev
@@ -51,7 +51,7 @@ rustPlatform.buildRustPackage rec {
     xorg.libXcursor
     xorg.libXi
     xorg.libXrandr
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Cocoa
     rustPlatform.bindgenHook
   ];
@@ -70,7 +70,7 @@ rustPlatform.buildRustPackage rec {
     wrapProgram $out/bin/jumpy --chdir $out/share
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/.jumpy-wrapped \
       --add-rpath ${lib.makeLibraryPath [ vulkan-loader ]}
   '';
diff --git a/pkgs/games/klavaro/default.nix b/pkgs/games/klavaro/default.nix
index 58dda8d23a63..adaae799cb5c 100644
--- a/pkgs/games/klavaro/default.nix
+++ b/pkgs/games/klavaro/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   '';
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in "$out"/bin/*; do
       if isELF "$f"; then
         patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$f"
diff --git a/pkgs/games/ldmud/default.nix b/pkgs/games/ldmud/default.nix
index 83bbadfe7dc4..de92518781fe 100644
--- a/pkgs/games/ldmud/default.nix
+++ b/pkgs/games/ldmud/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional postgresSupport postgresql
     ++ lib.optional sqliteSupport sqlite ++ lib.optional tlsSupport openssl
     ++ lib.optional pythonSupport python310
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # To support systems without autoconf LD puts its configure.ac in a non-default
   # location and uses a helper script. We skip that script and symlink the .ac
diff --git a/pkgs/games/libremines/default.nix b/pkgs/games/libremines/default.nix
index f1a79e54bd62..e639b981369e 100644
--- a/pkgs/games/libremines/default.nix
+++ b/pkgs/games/libremines/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     qtmultimedia
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
diff --git a/pkgs/games/lincity/default.nix b/pkgs/games/lincity/default.nix
index 3f77d9bbe415..deb4f2eb0250 100644
--- a/pkgs/games/lincity/default.nix
+++ b/pkgs/games/lincity/default.nix
@@ -38,6 +38,6 @@ stdenv.mkDerivation rec {
     homepage = "https://sourceforge.net/projects/lincity";
     maintainers = [ ];
     # ../lcintl.h:14:10: fatal error: 'libintl.h' file not found
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/games/liquidwar/5.nix b/pkgs/games/liquidwar/5.nix
index 9c61f97d1a7f..64ea76560f13 100644
--- a/pkgs/games/liquidwar/5.nix
+++ b/pkgs/games/liquidwar/5.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ allegro ];
 
-  configureFlags = lib.optional stdenv.isx86_64 "--disable-asm";
+  configureFlags = lib.optional stdenv.hostPlatform.isx86_64 "--disable-asm";
 
   hardeningDisable = [ "format" ];
 
diff --git a/pkgs/games/manaplus/default.nix b/pkgs/games/manaplus/default.nix
index deb12d45ad4b..768a971d8346 100644
--- a/pkgs/games/manaplus/default.nix
+++ b/pkgs/games/manaplus/default.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation rec {
     description = "Free OpenSource 2D MMORPG client";
     homepage = "https://manaplus.org/";
     license = lib.licenses.gpl2Plus;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/games/mchprs/default.nix b/pkgs/games/mchprs/default.nix
index 49ef836423cd..97fc84b5d9b4 100644
--- a/pkgs/games/mchprs/default.nix
+++ b/pkgs/games/mchprs/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     sqlite
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/games/mindustry/default.nix b/pkgs/games/mindustry/default.nix
index 789b2bca65a5..43001343b748 100644
--- a/pkgs/games/mindustry/default.nix
+++ b/pkgs/games/mindustry/default.nix
@@ -187,7 +187,7 @@ stdenv.mkDerivation {
       mkdir -p $out/bin
       makeWrapper ${jdk}/bin/java $out/bin/mindustry \
         --add-flags "-jar $out/share/mindustry.jar" \
-        ${lib.optionalString stdenv.isLinux "--suffix PATH : ${lib.makeBinPath [zenity]}"} \
+        ${lib.optionalString stdenv.hostPlatform.isLinux "--suffix PATH : ${lib.makeBinPath [zenity]}"} \
         --suffix LD_LIBRARY_PATH : ${lib.makeLibraryPath [libpulseaudio alsa-lib libjack2]} \
         --set ALSA_PLUGIN_DIR ${alsa-plugins}/lib/alsa-lib/'' + lib.optionalString enableWayland '' \
         --set SDL_VIDEODRIVER wayland \
@@ -240,6 +240,6 @@ stdenv.mkDerivation {
     maintainers = with lib.maintainers; [ chkno fgaz thekostins ];
     platforms = lib.platforms.all;
     # TODO alsa-lib is linux-only, figure out what dependencies are required on Darwin
-    broken = enableClient && stdenv.isDarwin;
+    broken = enableClient && stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/games/minecraft-servers/derivation.nix b/pkgs/games/minecraft-servers/derivation.nix
index a94a2daecac2..c6f26d73eb6f 100644
--- a/pkgs/games/minecraft-servers/derivation.nix
+++ b/pkgs/games/minecraft-servers/derivation.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation {
 
     makeWrapper ${lib.getExe jre_headless} $out/bin/minecraft-server \
       --append-flags "-jar $out/lib/minecraft/server.jar nogui" \
-      ${lib.optionalString stdenv.isLinux "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ udev ]}"}
+      ${lib.optionalString stdenv.hostPlatform.isLinux "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ udev ]}"}
 
     runHook postInstall
   '';
diff --git a/pkgs/games/minetest/default.nix b/pkgs/games/minetest/default.nix
index 3a49b5b90f44..f4ccf5ac71e9 100644
--- a/pkgs/games/minetest/default.nix
+++ b/pkgs/games/minetest/default.nix
@@ -119,13 +119,13 @@ stdenv.mkDerivation (finalAttrs: {
 
   postPatch = ''
     substituteInPlace src/filesys.cpp --replace "/bin/rm" "${coreutils}/bin/rm"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i '/pagezero_size/d;/fixup_bundle/d' src/CMakeLists.txt
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchShebangs $out
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/minetest.app $out/Applications
   '';
diff --git a/pkgs/games/mudlet/default.nix b/pkgs/games/mudlet/default.nix
index 78a7eb901c50..eef4560e386a 100644
--- a/pkgs/games/mudlet/default.nix
+++ b/pkgs/games/mudlet/default.nix
@@ -97,7 +97,7 @@ stdenv.mkDerivation rec {
     qtmultimedia
     yajl
     discord-rpc
-  ] ++ lib.optional stdenv.isDarwin [
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin [
     AppKit
   ];
 
@@ -122,7 +122,7 @@ stdenv.mkDerivation rec {
 
     cp -r ../translations $out/share/
 
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -r src/mudlet.app/ $out/Applications/mudlet.app
     mv $out/Applications/mudlet.app/Contents/MacOS/mudlet $out/Applications/mudlet.app/Contents/MacOS/mudlet-unwrapped
@@ -132,7 +132,7 @@ stdenv.mkDerivation rec {
       --prefix DYLD_LIBRARY_PATH : "${lib.makeLibraryPath [ libsForQt5.qtkeychain discord-rpc ]}:$out/lib" \
       --chdir "$out";
 
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir -pv $out/bin
     cp src/mudlet $out/bin/mudlet-unwrapped
     makeQtWrapper $out/bin/mudlet-unwrapped $out/bin/mudlet \
diff --git a/pkgs/games/npush/default.nix b/pkgs/games/npush/default.nix
index 7a061a4bc638..e3d199c7fa87 100644
--- a/pkgs/games/npush/default.nix
+++ b/pkgs/games/npush/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://npush.sourceforge.net/";
     description = "Sokoban-like game";
     mainProgram = "npush";
diff --git a/pkgs/games/opendungeons/default.nix b/pkgs/games/opendungeons/default.nix
index 3562aa8c6f89..a66504fa1d83 100644
--- a/pkgs/games/opendungeons/default.nix
+++ b/pkgs/games/opendungeons/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation {
   ];
 
   # source/utils/StackTraceUnix.cpp:122:2: error: #error Unsupported architecture.
-  postPatch = lib.optionalString (!stdenv.isx86_64) ''
+  postPatch = lib.optionalString (!stdenv.hostPlatform.isx86_64) ''
     cp source/utils/StackTrace{Stub,Unix}.cpp
   '';
 
diff --git a/pkgs/games/openmw/default.nix b/pkgs/games/openmw/default.nix
index edeed841c923..22bd90a348a9 100644
--- a/pkgs/games/openmw/default.nix
+++ b/pkgs/games/openmw/default.nix
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     sed '1i#include <memory>' -i components/myguiplatform/myguidatamanager.cpp # gcc12
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Don't fix Darwin app bundle
     sed -i '/fixup_bundle/d' CMakeLists.txt
   '';
@@ -74,7 +74,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config wrapQtAppsHook ];
 
   # If not set, OSG plugin .so files become shell scripts on Darwin.
-  dontWrapQtApps = stdenv.isDarwin;
+  dontWrapQtApps = stdenv.hostPlatform.isDarwin;
 
   buildInputs = [
     SDL2
@@ -90,7 +90,7 @@ stdenv.mkDerivation rec {
     recastnavigation
     unshield
     yaml-cpp
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreMedia
     VideoDecodeAcceleration
     VideoToolbox
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DOpenGL_GL_PREFERENCE=${GL}"
     "-DOPENMW_USE_SYSTEM_RECASTNAVIGATION=1"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DOPENMW_OSX_DEPLOYMENT=ON"
   ];
 
diff --git a/pkgs/games/openrw/default.nix b/pkgs/games/openrw/default.nix
index 061d053e34ec..d2d86226af26 100644
--- a/pkgs/games/openrw/default.nix
+++ b/pkgs/games/openrw/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation {
 
   buildInputs = [
     sfml libGLU libGL bullet glm libmad openal SDL2 boost ffmpeg_6
-  ] ++ lib.optionals stdenv.isDarwin [ OpenAL Cocoa ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ OpenAL Cocoa ];
 
   meta = with lib; {
     description = "Unofficial open source recreation of the classic Grand Theft Auto III game executable";
diff --git a/pkgs/games/openspades/default.nix b/pkgs/games/openspades/default.nix
index ebab9a018fbf..fd070312b1f9 100644
--- a/pkgs/games/openspades/default.nix
+++ b/pkgs/games/openspades/default.nix
@@ -65,6 +65,6 @@ stdenv.mkDerivation rec {
     platforms   = platforms.all;
     maintainers = with maintainers; [ abbradar azahi ];
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isDarwin || (stdenv.isLinux && stdenv.isAarch64);
+    broken = stdenv.hostPlatform.isDarwin || (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
   };
 }
diff --git a/pkgs/games/osu-lazer/bin.nix b/pkgs/games/osu-lazer/bin.nix
index d3dd268620ed..89ebe14cb41e 100644
--- a/pkgs/games/osu-lazer/bin.nix
+++ b/pkgs/games/osu-lazer/bin.nix
@@ -43,7 +43,7 @@ let
 
   passthru.updateScript = ./update-bin.sh;
 in
-if stdenv.isDarwin
+if stdenv.hostPlatform.isDarwin
 then stdenv.mkDerivation {
   inherit pname version src meta passthru;
 
diff --git a/pkgs/games/papermc/derivation.nix b/pkgs/games/papermc/derivation.nix
index 5dd169dbc9b4..c7ad650d00f6 100644
--- a/pkgs/games/papermc/derivation.nix
+++ b/pkgs/games/papermc/derivation.nix
@@ -22,7 +22,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
 
     makeWrapper ${lib.getExe jre} "$out/bin/minecraft-server" \
       --append-flags "-jar $out/share/papermc/papermc.jar nogui" \
-      ${lib.optionalString stdenvNoCC.isLinux "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ udev ]}"}
+      ${lib.optionalString stdenvNoCC.hostPlatform.isLinux "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ udev ]}"}
 
     runHook postInstall
   '';
diff --git a/pkgs/games/path-of-building/default.nix b/pkgs/games/path-of-building/default.nix
index 0fcd79b4b956..622df7873b38 100644
--- a/pkgs/games/path-of-building/default.nix
+++ b/pkgs/games/path-of-building/default.nix
@@ -64,7 +64,7 @@ stdenv.mkDerivation {
     qttools
     wrapQtAppsHook
     icoutils
-  ] ++ lib.optional stdenv.isLinux copyDesktopItems;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux copyDesktopItems;
 
   buildInputs = [
     qtbase
@@ -126,6 +126,6 @@ stdenv.mkDerivation {
     license = lib.licenses.mit;
     maintainers = [ lib.maintainers.k900 ];
     mainProgram = "pobfrontend";
-    broken = stdenv.isDarwin; # doesn't find uic6 for some reason
+    broken = stdenv.hostPlatform.isDarwin; # doesn't find uic6 for some reason
   };
 }
diff --git a/pkgs/games/powermanga/default.nix b/pkgs/games/powermanga/default.nix
index 3c89266370cf..eaa45460be92 100644
--- a/pkgs/games/powermanga/default.nix
+++ b/pkgs/games/powermanga/default.nix
@@ -55,6 +55,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/games/quake2/yquake2/default.nix b/pkgs/games/quake2/yquake2/default.nix
index 4135706c9813..3c78d0e5f233 100644
--- a/pkgs/games/quake2/yquake2/default.nix
+++ b/pkgs/games/quake2/yquake2/default.nix
@@ -25,13 +25,13 @@ let
     postPatch = ''
       substituteInPlace src/client/curl/qcurl.c \
         --replace "\"libcurl.so.3\", \"libcurl.so.4\"" "\"${curl.out}/lib/libcurl.so\", \"libcurl.so.3\", \"libcurl.so.4\""
-    '' + lib.optionalString (openalSupport && !stdenv.isDarwin) ''
+    '' + lib.optionalString (openalSupport && !stdenv.hostPlatform.isDarwin) ''
       substituteInPlace Makefile \
         --replace "\"libopenal.so.1\"" "\"${openal}/lib/libopenal.so.1\""
     '';
 
     buildInputs = [ SDL2 libGL curl ]
-      ++ lib.optionals stdenv.isDarwin [ Cocoa OpenAL ]
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa OpenAL ]
       ++ lib.optional openalSupport openal;
 
     makeFlags = [
diff --git a/pkgs/games/quakespasm/default.nix b/pkgs/games/quakespasm/default.nix
index 6b3080c7573e..5b124cb464d1 100644
--- a/pkgs/games/quakespasm/default.nix
+++ b/pkgs/games/quakespasm/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, SDL, SDL2, fetchurl, gzip, libvorbis, libmad, flac, libopus, opusfile, libogg, libxmp
 , Cocoa, CoreAudio, CoreFoundation, IOKit, OpenGL
 , copyDesktopItems, makeDesktopItem, pkg-config
-, useSDL2 ? stdenv.isDarwin # TODO: CoreAudio fails to initialize with SDL 1.x for some reason.
+, useSDL2 ? stdenv.hostPlatform.isDarwin # TODO: CoreAudio fails to initialize with SDL 1.x for some reason.
 }:
 
 stdenv.mkDerivation rec {
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   sourceRoot = "${pname}-${version}/Quake";
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     # Makes Darwin Makefile use system libraries instead of ones from app bundle
     ./quakespasm-darwin-makefile-improvements.patch
   ];
@@ -28,9 +28,9 @@ stdenv.mkDerivation rec {
   buildInputs = [
     gzip libvorbis libmad flac libopus opusfile libogg libxmp
     (if useSDL2 then SDL2 else SDL)
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa CoreAudio IOKit OpenGL
-  ] ++ lib.optionals (stdenv.isDarwin && useSDL2) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && useSDL2) [
     CoreFoundation
   ];
 
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
     "USE_SDL2=1"
   ];
 
-  makefile = if (stdenv.isDarwin) then "Makefile.darwin" else "Makefile";
+  makefile = if (stdenv.hostPlatform.isDarwin) then "Makefile.darwin" else "Makefile";
 
   preInstall = ''
     mkdir -p "$out/bin"
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     substituteInPlace Makefile.darwin --replace "/usr/local/games" "$out/bin"
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Let's build app bundle
     mkdir -p $out/Applications/Quake.app/Contents/MacOS
     mkdir -p $out/Applications/Quake.app/Contents/Resources
diff --git a/pkgs/games/quakespasm/vulkan.nix b/pkgs/games/quakespasm/vulkan.nix
index 32428107d850..d4fdc41b4a32 100644
--- a/pkgs/games/quakespasm/vulkan.nix
+++ b/pkgs/games/quakespasm/vulkan.nix
@@ -47,14 +47,14 @@ stdenv.mkDerivation rec {
     libvorbis
     opusfile
     vulkan-loader
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     moltenvk
     vulkan-headers
   ];
 
   buildFlags = [ "DO_USERDIRS=1" ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_COMPILE = lib.concatStringsSep " " [
       "-Wno-error=unused-but-set-variable"
       "-Wno-error=implicit-const-int-float-conversion"
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
     cp vkquake "$out/bin"
   '';
 
-  postFixup = lib.optionalString (!stdenv.isDarwin) ''
+  postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     patchelf $out/bin/vkquake \
       --add-rpath ${lib.makeLibraryPath [ vulkan-loader ]}
   '';
diff --git a/pkgs/games/quantumminigolf/default.nix b/pkgs/games/quantumminigolf/default.nix
index c91fb8b28c53..b7e8feae2428 100644
--- a/pkgs/games/quantumminigolf/default.nix
+++ b/pkgs/games/quantumminigolf/default.nix
@@ -36,6 +36,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ raskin ];
     platforms = platforms.linux;
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/games/randtype/default.nix b/pkgs/games/randtype/default.nix
index f7e6ee06ceac..ba5c40367ec0 100644
--- a/pkgs/games/randtype/default.nix
+++ b/pkgs/games/randtype/default.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ dandellion ];
     license = licenses.gpl2Only;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/randtype.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/randtype.x86_64-darwin
   };
 }
diff --git a/pkgs/games/raylib-games/default.nix b/pkgs/games/raylib-games/default.nix
index 7a0d80a4c5e6..cad4424a3088 100644
--- a/pkgs/games/raylib-games/default.nix
+++ b/pkgs/games/raylib-games/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ raylib ]
-    ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   configurePhase = ''
     runHook preConfigure
diff --git a/pkgs/games/scummvm/default.nix b/pkgs/games/scummvm/default.nix
index 2252146679b2..6c6fc7fac0ae 100644
--- a/pkgs/games/scummvm/default.nix
+++ b/pkgs/games/scummvm/default.nix
@@ -16,9 +16,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ nasm ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib libGLU libGL
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa AudioToolbox Carbon CoreMIDI AudioUnit
   ] ++ [
     curl freetype flac fluidsynth libjpeg libmad libmpeg2 libogg libtheora libvorbis SDL2 zlib
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   # They use 'install -s', that calls the native strip instead of the cross
   postConfigure = ''
     sed -i "s/-c -s/-c -s --strip-program=''${STRIP@Q}/" ports.mk
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace config.mk \
       --replace x86_64-apple-darwin-ranlib ${cctools}/bin/ranlib \
       --replace aarch64-apple-darwin-ranlib ${cctools}/bin/ranlib
diff --git a/pkgs/games/shipwright/default.nix b/pkgs/games/shipwright/default.nix
index d214e6934b19..2ff8c063f5f0 100644
--- a/pkgs/games/shipwright/default.nix
+++ b/pkgs/games/shipwright/default.nix
@@ -62,10 +62,10 @@ stdenv.mkDerivation (finalAttrs: {
     python3
     imagemagick
     makeWrapper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     lsb-release
     copyDesktopItems
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libicns
     darwin.sigtool
   ];
@@ -76,7 +76,7 @@ stdenv.mkDerivation (finalAttrs: {
     SDL2
     SDL2_net
     libpng
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libX11
     libXrandr
     libXinerama
@@ -85,7 +85,7 @@ stdenv.mkDerivation (finalAttrs: {
     libXext
     libpulseaudio
     zenity
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     IOSurface
     Metal
     QuartzCore
@@ -100,7 +100,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   env.NIX_CFLAGS_COMPILE =
-    lib.optionalString stdenv.isDarwin "-Wno-int-conversion -Wno-implicit-int";
+    lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-int-conversion -Wno-implicit-int";
 
   dontAddPrefix = true;
 
@@ -114,18 +114,18 @@ stdenv.mkDerivation (finalAttrs: {
     popd
   '';
 
-  preInstall = lib.optionalString stdenv.isLinux ''
+  preInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     # Cmake likes it here for its install paths
     cp ../OTRExporter/soh.otr ..
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp ../OTRExporter/soh.otr soh/soh.otr
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/bin
     ln -s $out/lib/soh.elf $out/bin/soh
     install -Dm644 ../soh/macosx/sohIcon.png $out/share/pixmaps/soh.png
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Recreate the macOS bundle (without using cpack)
     # We mirror the structure of the bundle distributed by the project
 
@@ -167,7 +167,7 @@ stdenv.mkDerivation (finalAttrs: {
     codesign -f -s - $out/Applications/soh.app/Contents/Resources/soh-macos
   '';
 
-  fixupPhase = lib.optionalString stdenv.isLinux ''
+  fixupPhase = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/lib/soh.elf --prefix PATH ":" ${lib.makeBinPath [ zenity ]}
   '';
 
diff --git a/pkgs/games/simutrans/default.nix b/pkgs/games/simutrans/default.nix
index 6a48c5a2caeb..b6452819bee5 100644
--- a/pkgs/games/simutrans/default.nix
+++ b/pkgs/games/simutrans/default.nix
@@ -121,8 +121,8 @@ let
     configurePhase = let
       # Configuration as per the readme.txt and config.template
       platform =
-        if stdenv.isLinux then "linux" else
-        if stdenv.isDarwin then "mac" else throw "add your platform";
+        if stdenv.hostPlatform.isLinux then "linux" else
+        if stdenv.hostPlatform.isDarwin then "mac" else throw "add your platform";
       config = ''
         BACKEND = mixer_sdl
         COLOUR_DEPTH = 16
diff --git a/pkgs/games/sm64ex/generic.nix b/pkgs/games/sm64ex/generic.nix
index fcdd6616a506..fd53b78042f5 100644
--- a/pkgs/games/sm64ex/generic.nix
+++ b/pkgs/games/sm64ex/generic.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [
     "VERSION=${region}"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "OSX_BUILD=1"
   ] ++ compileFlags;
 
diff --git a/pkgs/games/snipes/default.nix b/pkgs/games/snipes/default.nix
index f978a1b71d7b..7212d6d81670 100644
--- a/pkgs/games/snipes/default.nix
+++ b/pkgs/games/snipes/default.nix
@@ -42,6 +42,6 @@ in stdenv.mkDerivation {
     homepage    = "https://www.vogons.org/viewtopic.php?f=7&t=49073";
     license     = licenses.free; # This reverse-engineered source code is released with the original authors' permission.
     maintainers = with maintainers; [ peterhoeg cybershadow ];
-    broken      = stdenv.isDarwin; # not supported upstream - https://github.com/Davidebyzero/Snipes/issues/8#issuecomment-433720046
+    broken      = stdenv.hostPlatform.isDarwin; # not supported upstream - https://github.com/Davidebyzero/Snipes/issues/8#issuecomment-433720046
   };
 }
diff --git a/pkgs/games/space-cadet-pinball/default.nix b/pkgs/games/space-cadet-pinball/default.nix
index 53edf5860518..0f3009e4abe5 100644
--- a/pkgs/games/space-cadet-pinball/default.nix
+++ b/pkgs/games/space-cadet-pinball/default.nix
@@ -27,11 +27,11 @@ stdenv.mkDerivation rec {
   buildInputs = [
     SDL2
     SDL2_mixer
-  ] ++ lib.optional stdenv.isDarwin Cocoa;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   # Darwin needs a custom installphase since it is excluded from the cmake install
   # https://github.com/k4zmu2a/SpaceCadetPinball/blob/0f88e43ba261bc21fa5c3ef9d44969a2a079d0de/CMakeLists.txt#L221
-  installPhase = lib.optionalString stdenv.isDarwin ''
+  installPhase = lib.optionalString stdenv.hostPlatform.isDarwin ''
     runHook preInstall
     mkdir -p $out/bin
     install ../bin/SpaceCadetPinball $out/bin
diff --git a/pkgs/games/space-orbit/default.nix b/pkgs/games/space-orbit/default.nix
index 74db273bb879..c5bd6fdf77f0 100644
--- a/pkgs/games/space-orbit/default.nix
+++ b/pkgs/games/space-orbit/default.nix
@@ -38,7 +38,7 @@ EOF
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Space combat simulator";
     mainProgram = "space-orbit";
     license = licenses.gpl2Plus;
diff --git a/pkgs/games/steam/fhsenv.nix b/pkgs/games/steam/fhsenv.nix
index 1c92bb261765..6a4a1e002058 100644
--- a/pkgs/games/steam/fhsenv.nix
+++ b/pkgs/games/steam/fhsenv.nix
@@ -46,7 +46,7 @@ let
     sqlite
   ] ++ extraPkgs pkgs;
 
-  ldPath = lib.optionals stdenv.is64bit [ "/lib64" ]
+  ldPath = lib.optionals stdenv.hostPlatform.is64bit [ "/lib64" ]
   ++ [ "/lib32" ]
   ++ map (x: "/steamrt/${steam-runtime-wrapped.arch}/" + x) steam-runtime-wrapped.libs
   ++ lib.optionals (steam-runtime-wrapped-i686 != null) (map (x: "/steamrt/${steam-runtime-wrapped-i686.arch}/" + x) steam-runtime-wrapped-i686.libs);
diff --git a/pkgs/games/stockfish/default.nix b/pkgs/games/stockfish/default.nix
index 456c36784d5f..b4531fc0015d 100644
--- a/pkgs/games/stockfish/default.nix
+++ b/pkgs/games/stockfish/default.nix
@@ -4,11 +4,11 @@ let
     # The x86-64-modern may need to be refined further in the future
     # but stdenv.hostPlatform CPU flags do not currently work on Darwin
     # https://discourse.nixos.org/t/darwin-system-and-stdenv-hostplatform-features/9745
-    archDarwin = if stdenv.isx86_64 then "x86-64-modern" else "apple-silicon";
-    arch = if stdenv.isDarwin then archDarwin else
-           if stdenv.isx86_64 then "x86-64" else
-           if stdenv.isi686 then "x86-32" else
-           if stdenv.isAarch64 then "armv8" else
+    archDarwin = if stdenv.hostPlatform.isx86_64 then "x86-64-modern" else "apple-silicon";
+    arch = if stdenv.hostPlatform.isDarwin then archDarwin else
+           if stdenv.hostPlatform.isx86_64 then "x86-64" else
+           if stdenv.hostPlatform.isi686 then "x86-32" else
+           if stdenv.hostPlatform.isAarch64 then "armv8" else
            "unknown";
 
     # These files can be found in src/evaluate.h
diff --git a/pkgs/games/system-syzygy/default.nix b/pkgs/games/system-syzygy/default.nix
index b478259a8a9c..d321284b7427 100644
--- a/pkgs/games/system-syzygy/default.nix
+++ b/pkgs/games/system-syzygy/default.nix
@@ -43,7 +43,7 @@ rustPlatform.buildRustPackage rec {
 
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Story and a puzzle game, where you solve a variety of puzzle";
     mainProgram = "syzygy";
     homepage = "https://mdsteele.games/syzygy";
diff --git a/pkgs/games/taisei/default.nix b/pkgs/games/taisei/default.nix
index cb87e48da38e..ee5712f7b7f6 100644
--- a/pkgs/games/taisei/default.nix
+++ b/pkgs/games/taisei/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Free and open-source Touhou Project clone and fangame";
     mainProgram = "taisei";
     longDescription = ''
diff --git a/pkgs/games/tecnoballz/default.nix b/pkgs/games/tecnoballz/default.nix
index 0d19a2c0f7e2..b3f1914bc18e 100644
--- a/pkgs/games/tecnoballz/default.nix
+++ b/pkgs/games/tecnoballz/default.nix
@@ -65,6 +65,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/games/teeworlds/default.nix b/pkgs/games/teeworlds/default.nix
index 505c61588e3e..b07dbc311a2c 100644
--- a/pkgs/games/teeworlds/default.nix
+++ b/pkgs/games/teeworlds/default.nix
@@ -51,19 +51,19 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     pkg-config
-  ] ++ lib.optionals (buildClient && stdenv.isLinux) [
+  ] ++ lib.optionals (buildClient && stdenv.hostPlatform.isLinux) [
     icoutils
   ];
 
   buildInputs = [
     python3 lua5_3 zlib
     wavpack
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Cocoa
   ] ++ lib.optionals buildClient ([
     SDL2
     freetype
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libGLU
     alsa-lib
     libX11
@@ -73,14 +73,14 @@ stdenv.mkDerivation rec {
     "-DCLIENT=${if buildClient then "ON" else "OFF"}"
   ];
 
-  postInstall = lib.optionalString buildClient (lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString buildClient (lib.optionalString stdenv.hostPlatform.isLinux ''
     # Convert and install desktop icon
     mkdir -p $out/share/pixmaps
     icotool --extract --index 1 --output $out/share/pixmaps/teeworlds.png $src/other/icons/teeworlds.ico
 
     # Install menu item
     install -D $src/other/teeworlds.desktop $out/share/applications/teeworlds.desktop
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p "$out/Applications/teeworlds.app/Contents/MacOS"
     mkdir -p "$out/Applications/teeworlds.app/Contents/Resources"
 
diff --git a/pkgs/games/uhexen2/default.nix b/pkgs/games/uhexen2/default.nix
index 1d44b16c3aef..a0922a145703 100644
--- a/pkgs/games/uhexen2/default.nix
+++ b/pkgs/games/uhexen2/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Cross-platform port of Hexen II game";
     longDescription = ''
       Hammer of Thyrion (uHexen2) is a cross-platform port of Raven Software's Hexen II source.
diff --git a/pkgs/games/vessel/default.nix b/pkgs/games/vessel/default.nix
index 42408cd042aa..ddbbf68bbc08 100644
--- a/pkgs/games/vessel/default.nix
+++ b/pkgs/games/vessel/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     directory where you saved it.
   '';
 
-  src = if (stdenv.isi686) then
+  src = if (stdenv.hostPlatform.isi686) then
     requireFile {
       message = goBuyItNow;
       name = "vessel-${version}-bin";
diff --git a/pkgs/games/voxelands/default.nix b/pkgs/games/voxelands/default.nix
index bac78ab72f35..b1b30a7e769d 100644
--- a/pkgs/games/voxelands/default.nix
+++ b/pkgs/games/voxelands/default.nix
@@ -69,6 +69,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = [ ];
-    broken = stdenv.isAarch64;  # build fails with "libIrrlicht.so: undefined reference to `png_init_filter_functions_neon'"
+    broken = stdenv.hostPlatform.isAarch64;  # build fails with "libIrrlicht.so: undefined reference to `png_init_filter_functions_neon'"
   };
 }
diff --git a/pkgs/games/warsow/engine.nix b/pkgs/games/warsow/engine.nix
index 5bc2ef7dbd91..71bf581f14fa 100644
--- a/pkgs/games/warsow/engine.nix
+++ b/pkgs/games/warsow/engine.nix
@@ -54,6 +54,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ astsmtl abbradar ];
     platforms = platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/games/warzone2100/default.nix b/pkgs/games/warzone2100/default.nix
index 45b2123e443a..81ab98e67bc9 100644
--- a/pkgs/games/warzone2100/default.nix
+++ b/pkgs/games/warzone2100/default.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
     freetype
     harfbuzz
     sqlite
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     vulkan-headers
     vulkan-loader
   ];
@@ -102,7 +102,7 @@ stdenv.mkDerivation (finalAttrs: {
     #
     # Alternatively, we could have set CMAKE_INSTALL_BINDIR to "bin".
     "-DCMAKE_INSTALL_DATAROOTDIR=${placeholder "out"}/share"
-  ] ++ lib.optional stdenv.isDarwin "-P../configure_mac.cmake";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "-P../configure_mac.cmake";
 
   postInstall = lib.optionalString withVideos ''
     cp ${sequences_src} $out/share/warzone2100/sequences.wz
@@ -141,6 +141,6 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = platforms.all;
     # configure_mac.cmake tries to download stuff
     # https://github.com/Warzone2100/warzone2100/blob/master/macosx/README.md
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/games/wesnoth/default.nix b/pkgs/games/wesnoth/default.nix
index 01dd8ceaca17..5017216aecc4 100644
--- a/pkgs/games/wesnoth/default.nix
+++ b/pkgs/games/wesnoth/default.nix
@@ -20,13 +20,13 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ SDL2 SDL2_image SDL2_mixer SDL2_net SDL2_ttf pango gettext boost
                   libvorbis fribidi dbus libpng pcre openssl icu lua curl ]
-                ++ lib.optionals stdenv.isDarwin [ Cocoa Foundation];
+                ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa Foundation];
 
   cmakeFlags = [
     "-DENABLE_SYSTEM_LUA=ON"
   ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework AppKit";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework AppKit";
 
   meta = with lib; {
     description = "Battle for Wesnoth, a free, turn-based strategy game with a fantasy theme";
diff --git a/pkgs/games/widelands/default.nix b/pkgs/games/widelands/default.nix
index c2d7e48e456d..e34e23ab6035 100644
--- a/pkgs/games/widelands/default.nix
+++ b/pkgs/games/widelands/default.nix
@@ -72,12 +72,12 @@ stdenv.mkDerivation rec {
     libSM  # XXX: these should be propagated by SDL2?
     libICE
   ]
-  ++ lib.optional stdenv.isLinux libXext
-  ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ++ lib.optional stdenv.hostPlatform.isLinux libXext
+  ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Cocoa
   ]);
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     install -Dm444 -t $out/share/applications ../xdg/org.widelands.Widelands.desktop
 
     for s in 16 32 48 64 128; do
diff --git a/pkgs/games/zaz/default.nix b/pkgs/games/zaz/default.nix
index 3af6f069a5aa..dca1d74a43ff 100644
--- a/pkgs/games/zaz/default.nix
+++ b/pkgs/games/zaz/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Puzzle game about arranging balls in triplets, like Luxor, Zuma, or Puzzle Bobble";
     homepage = "https://zaz.sourceforge.net/";
     license = licenses.gpl3;
diff --git a/pkgs/misc/base16-builder/node-packages.nix b/pkgs/misc/base16-builder/node-packages.nix
index f4120816cba9..b4bd9d9d41d2 100644
--- a/pkgs/misc/base16-builder/node-packages.nix
+++ b/pkgs/misc/base16-builder/node-packages.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../development/node-packages/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages-generated.nix {
diff --git a/pkgs/misc/calaos/installer/default.nix b/pkgs/misc/calaos/installer/default.nix
index fc312b1d519c..853c187d38ae 100644
--- a/pkgs/misc/calaos/installer/default.nix
+++ b/pkgs/misc/calaos/installer/default.nix
@@ -16,7 +16,7 @@ mkDerivation rec {
 
   qmakeFlags = [ "REVISION=${version}" ];
 
-  installPhase = if stdenv.isDarwin then ''
+  installPhase = if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
     cp -a calaos_installer.app $out/Applications
   '' else ''
diff --git a/pkgs/misc/cliscord/default.nix b/pkgs/misc/cliscord/default.nix
index bdfa620ef3f2..0617b0f8069b 100644
--- a/pkgs/misc/cliscord/default.nix
+++ b/pkgs/misc/cliscord/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-dmR49yyErahOUxR9pGW1oYy8Wq5SWOprK317u+JPBv4=";
   };
 
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   nativeBuildInputs = [ pkg-config ];
 
diff --git a/pkgs/misc/cups/default.nix b/pkgs/misc/cups/default.nix
index 194074ce9cb6..4c9d2de10873 100644
--- a/pkgs/misc/cups/default.nix
+++ b/pkgs/misc/cups/default.nix
@@ -48,21 +48,21 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config removeReferencesTo ];
 
   buildInputs = [ zlib libjpeg libpng libtiff libusb1 gnutls libpaper ]
-    ++ lib.optionals stdenv.isLinux [ avahi pam dbus acl ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ avahi pam dbus acl ]
     ++ lib.optional enableSystemd systemd
-    ++ lib.optionals stdenv.isDarwin (with darwin; [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin; [
       configd apple_sdk.frameworks.ApplicationServices
     ]);
 
   propagatedBuildInputs = [ gmp ];
 
-  configurePlatforms = lib.optionals stdenv.isLinux [ "build" "host" ];
+  configurePlatforms = lib.optionals stdenv.hostPlatform.isLinux [ "build" "host" ];
   configureFlags = [
     "--localstatedir=/var"
     "--sysconfdir=/etc"
     "--enable-raw-printing"
     "--enable-threads"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--enable-dbus"
     "--enable-pam"
     "--with-dbusdir=${placeholder "out"}/share/dbus-1"
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
 
       "--with-systemd=$out/lib/systemd/system"
 
-      ${lib.optionalString stdenv.isDarwin ''
+      ${lib.optionalString stdenv.hostPlatform.isDarwin ''
         "--with-bundledir=$out"
       ''}
     )
@@ -111,7 +111,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   postInstall = ''
-      libexec=${if stdenv.isDarwin then "libexec/cups" else "lib/cups"}
+      libexec=${if stdenv.hostPlatform.isDarwin then "libexec/cups" else "lib/cups"}
       moveToOutput $libexec "$out"
 
       # $lib contains references to $out/share/cups.
@@ -130,7 +130,7 @@ stdenv.mkDerivation rec {
       for f in "$out"/lib/systemd/system/*; do
         substituteInPlace "$f" --replace "$lib/$libexec" "$out/$libexec"
       done
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       # Use xdg-open when on Linux
       substituteInPlace "$out"/share/applications/cups.desktop \
         --replace "Exec=htmlview" "Exec=xdg-open"
diff --git a/pkgs/misc/cups/drivers/brgenml1lpr/default.nix b/pkgs/misc/cups/drivers/brgenml1lpr/default.nix
index d683e80b2893..98116903ec64 100644
--- a/pkgs/misc/cups/drivers/brgenml1lpr/default.nix
+++ b/pkgs/misc/cups/drivers/brgenml1lpr/default.nix
@@ -30,7 +30,7 @@
 let
   myPatchElf = file: ''
     patchelf --set-interpreter \
-      ${stdenv.cc.libc}/lib/ld-linux${lib.optionalString stdenv.is64bit "-x86-64"}.so.2 \
+      ${stdenv.cc.libc}/lib/ld-linux${lib.optionalString stdenv.hostPlatform.is64bit "-x86-64"}.so.2 \
       ${file}
   '';
 in
diff --git a/pkgs/misc/drivers/spacenavd/default.nix b/pkgs/misc/drivers/spacenavd/default.nix
index eb2fc165cccb..27ea69943cc1 100644
--- a/pkgs/misc/drivers/spacenavd/default.nix
+++ b/pkgs/misc/drivers/spacenavd/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ libX11 ]
-    ++ lib.optional stdenv.isDarwin IOKit;
+    ++ lib.optional stdenv.hostPlatform.isDarwin IOKit;
 
   configureFlags = [ "--disable-debug" ];
 
diff --git a/pkgs/misc/frescobaldi/default.nix b/pkgs/misc/frescobaldi/default.nix
index f37826501d72..653c4747c933 100644
--- a/pkgs/misc/frescobaldi/default.nix
+++ b/pkgs/misc/frescobaldi/default.nix
@@ -56,7 +56,7 @@ python311Packages.buildPythonApplication rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ sepi ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/frescobaldi.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/frescobaldi.x86_64-darwin
     mainProgram = "frescobaldi";
   };
 }
diff --git a/pkgs/misc/ghostscript/default.nix b/pkgs/misc/ghostscript/default.nix
index 466bd1c90938..c5cb69bea4b5 100644
--- a/pkgs/misc/ghostscript/default.nix
+++ b/pkgs/misc/ghostscript/default.nix
@@ -21,7 +21,7 @@
 , bash
 , buildPackages
 , openjpeg
-, cupsSupport ? config.ghostscript.cups or (!stdenv.isDarwin)
+, cupsSupport ? config.ghostscript.cups or (!stdenv.hostPlatform.isDarwin)
 , cups
 , x11Support ? cupsSupport
 , xorg # with CUPS, X11 only adds very little
@@ -125,7 +125,7 @@ stdenv.mkDerivation rec {
   buildFlags = [ "so" ]
     # without -headerpad, the following error occurs on Darwin when compiling with X11 support (as of 10.02.0)
     # error: install_name_tool: changing install names or rpaths can't be redone for: [...]libgs.dylib.10 (the program must be relinked, and you may need to use -headerpad or -headerpad_max_install_names)
-    ++ lib.optional (x11Support && stdenv.isDarwin) "LDFLAGS=-headerpad_max_install_names";
+    ++ lib.optional (x11Support && stdenv.hostPlatform.isDarwin) "LDFLAGS=-headerpad_max_install_names";
   installTargets = [ "soinstall" ];
 
   postInstall = ''
@@ -136,7 +136,7 @@ stdenv.mkDerivation rec {
     mkdir -p $fonts/share/fonts
     cp -rv ${fonts}/* "$fonts/share/fonts/"
     ln -s "$fonts/share/fonts" "$out/share/ghostscript/fonts"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     for file in $out/lib/*.dylib* ; do
       install_name_tool -id "$file" $file
     done
@@ -144,7 +144,7 @@ stdenv.mkDerivation rec {
 
   # dynamic library name only contains maj.min, eg. '9.53'
   dylib_version = lib.versions.majorMinor version;
-  preFixup = lib.optionalString stdenv.isDarwin ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -change libgs.dylib.$dylib_version $out/lib/libgs.dylib.$dylib_version $out/bin/gs
     install_name_tool -change libgs.dylib.$dylib_version $out/lib/libgs.dylib.$dylib_version $out/bin/gsx
   '';
diff --git a/pkgs/misc/jackaudio/default.nix b/pkgs/misc/jackaudio/default.nix
index 09e158da3ac3..54827497f846 100644
--- a/pkgs/misc/jackaudio/default.nix
+++ b/pkgs/misc/jackaudio/default.nix
@@ -20,7 +20,7 @@ let
 
   libOnly = prefix == "lib";
 
-  optDbus = if stdenv.isDarwin then null else shouldUsePkg dbus;
+  optDbus = if stdenv.hostPlatform.isDarwin then null else shouldUsePkg dbus;
   optPythonDBus = if libOnly then null else shouldUsePkg dbus-python;
   optLibffado = if libOnly then null else shouldUsePkg libffado;
   optAlsaLib = if libOnly then null else shouldUsePkg alsa-lib;
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ pkg-config python makeWrapper wafHook ];
   buildInputs = [ libsamplerate libsndfile readline eigen celt
     optDbus optPythonDBus optLibffado optAlsaLib optLibopus
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     aften AudioUnit CoreAudio Accelerate libobjc
   ];
 
diff --git a/pkgs/misc/jackaudio/jack1.nix b/pkgs/misc/jackaudio/jack1.nix
index 428bb9685f47..d50f21f53fcb 100644
--- a/pkgs/misc/jackaudio/jack1.nix
+++ b/pkgs/misc/jackaudio/jack1.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation (finalAttrs: {
   passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "JACK audio connection kit";
     homepage = "https://jackaudio.org";
     license = with licenses; [ gpl2Plus lgpl21 ];
diff --git a/pkgs/misc/jackaudio/tools.nix b/pkgs/misc/jackaudio/tools.nix
index e0e51a0ba4d9..76826d30cae9 100644
--- a/pkgs/misc/jackaudio/tools.nix
+++ b/pkgs/misc/jackaudio/tools.nix
@@ -16,7 +16,7 @@
 , zita-alsa-pcmi
 , zita-resampler
 
-, enableAlsa ? stdenv.isLinux
+, enableAlsa ? stdenv.hostPlatform.isLinux
 }:
 
 stdenv.mkDerivation (final: {
diff --git a/pkgs/misc/lilypond/default.nix b/pkgs/misc/lilypond/default.nix
index 327882951d29..95bc57227e20 100644
--- a/pkgs/misc/lilypond/default.nix
+++ b/pkgs/misc/lilypond/default.nix
@@ -63,7 +63,7 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
   };
 
-  FONTCONFIG_FILE = lib.optional stdenv.isDarwin (makeFontsConf {
+  FONTCONFIG_FILE = lib.optional stdenv.hostPlatform.isDarwin (makeFontsConf {
     fontDirectories = [ freefont_ttf ];
   });
 }
diff --git a/pkgs/misc/moonfire-nvr/default.nix b/pkgs/misc/moonfire-nvr/default.nix
index d6a994ac3e68..67e5f129927c 100644
--- a/pkgs/misc/moonfire-nvr/default.nix
+++ b/pkgs/misc/moonfire-nvr/default.nix
@@ -54,7 +54,7 @@ in rustPlatform.buildRustPackage {
   buildInputs = [
     ncurses
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Security
   ]);
 
diff --git a/pkgs/misc/opcua-client-gui/default.nix b/pkgs/misc/opcua-client-gui/default.nix
index c37568cfc9cb..226697060365 100644
--- a/pkgs/misc/opcua-client-gui/default.nix
+++ b/pkgs/misc/opcua-client-gui/default.nix
@@ -20,7 +20,7 @@ python3Packages.buildPythonApplication rec {
   };
 
   nativeBuildInputs = [ copyDesktopItems wrapQtAppsHook ]
-    ++ lib.optionals stdenv.isDarwin [ desktopToDarwinBundle ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ desktopToDarwinBundle ];
 
   makeWrapperArgs = [
     "\${qtWrapperArgs[@]}"
diff --git a/pkgs/misc/source-and-tags/default.nix b/pkgs/misc/source-and-tags/default.nix
index eb243aa4f9b8..9e73b77c59cf 100644
--- a/pkgs/misc/source-and-tags/default.nix
+++ b/pkgs/misc/source-and-tags/default.nix
@@ -58,7 +58,7 @@
                     # without this creating tag files for lifted-base fails
                     export LC_ALL=en_US.UTF-8
                     export LANG=en_US.UTF-8
-                    ${lib.optionalString stdenv.isLinux "export LOCALE_ARCHIVE=${glibcLocales}/lib/locale/locale-archive;"}
+                    ${lib.optionalString stdenv.hostPlatform.isLinux "export LOCALE_ARCHIVE=${glibcLocales}/lib/locale/locale-archive;"}
 
                     ${toString hasktags}/bin/hasktags --ignore-close-implementation --ctags .
                     mv tags \$TAG_FILE
diff --git a/pkgs/misc/stabber/default.nix b/pkgs/misc/stabber/default.nix
index fd64b3942b5a..5ca07007d14a 100644
--- a/pkgs/misc/stabber/default.nix
+++ b/pkgs/misc/stabber/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ pkg-config autoreconfHook ];
   buildInputs = [ glib expat libmicrohttpd ] ++
-    lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   meta = with lib; {
     description = "Stubbed XMPP Server";
diff --git a/pkgs/misc/t-rec/default.nix b/pkgs/misc/t-rec/default.nix
index ac99abb7e5cd..c67a8d60557b 100644
--- a/pkgs/misc/t-rec/default.nix
+++ b/pkgs/misc/t-rec/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = [ imagemagick ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv Foundation ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Foundation ];
 
   postInstall = ''
     wrapProgram "$out/bin/t-rec" --prefix PATH : "${binPath}"
diff --git a/pkgs/misc/tmux-plugins/default.nix b/pkgs/misc/tmux-plugins/default.nix
index dacf6ba1ef6f..d8da9f10164c 100644
--- a/pkgs/misc/tmux-plugins/default.nix
+++ b/pkgs/misc/tmux-plugins/default.nix
@@ -593,7 +593,7 @@ in rec {
       rev = "e91b178ff832b7bcbbf4d99d9f467f63fd1b76b5";
       sha256 = "1z8dfbwblrbmb8sgb0k8h1q0dvfdz7gw57las8nwd5gj6ss1jyvx";
     };
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       sed -e 's:reattach-to-user-namespace:${pkgs.reattach-to-user-namespace}/bin/reattach-to-user-namespace:g' -i $target/sensible.tmux
     '';
   };
diff --git a/pkgs/misc/urbit/default.nix b/pkgs/misc/urbit/default.nix
index aa78c949e5c0..955b16bf693e 100644
--- a/pkgs/misc/urbit/default.nix
+++ b/pkgs/misc/urbit/default.nix
@@ -4,8 +4,8 @@
 }:
 
 let
-  os = if stdenv.isDarwin then "macos" else "linux";
-  arch = if stdenv.isAarch64 then "aarch64" else "x86_64";
+  os = if stdenv.hostPlatform.isDarwin then "macos" else "linux";
+  arch = if stdenv.hostPlatform.isAarch64 then "aarch64" else "x86_64";
   platform = "${os}-${arch}";
 in
 stdenv.mkDerivation rec {
diff --git a/pkgs/misc/wiki-tui/default.nix b/pkgs/misc/wiki-tui/default.nix
index 1724fe435faa..4d96c78cb560 100644
--- a/pkgs/misc/wiki-tui/default.nix
+++ b/pkgs/misc/wiki-tui/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     ncurses
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoHash = "sha256-XovbT+KC0va7yC5j7kf6t1SnXe1uyy1KI8FRV1AwkS0=";
 
diff --git a/pkgs/os-specific/bsd/freebsd/pkgs/make.nix b/pkgs/os-specific/bsd/freebsd/pkgs/make.nix
index ecf231c30414..a622e25f7a77 100644
--- a/pkgs/os-specific/bsd/freebsd/pkgs/make.nix
+++ b/pkgs/os-specific/bsd/freebsd/pkgs/make.nix
@@ -13,7 +13,7 @@ mkDerivation {
       export NIX_CFLAGS_COMPILE+=" -D_PATH_DEFSYSPATH=\"$out/share/mk\""
 
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace $BSDSRCDIR/share/mk/bsd.sys.mk \
         --replace '-Wl,--fatal-warnings' "" \
         --replace '-Wl,--warn-shared-textrel' ""
diff --git a/pkgs/os-specific/bsd/freebsd/pkgs/mkDerivation.nix b/pkgs/os-specific/bsd/freebsd/pkgs/mkDerivation.nix
index 4c2fe571999f..1a3b0f823253 100644
--- a/pkgs/os-specific/bsd/freebsd/pkgs/mkDerivation.nix
+++ b/pkgs/os-specific/bsd/freebsd/pkgs/mkDerivation.nix
@@ -89,14 +89,14 @@ lib.makeOverridable (
       # Since STRIP in `makeFlags` has to be a flag, not the binary itself
       STRIPBIN = "${stdenv'.cc.bintools.targetPrefix}strip";
     }
-    // lib.optionalAttrs stdenv'.isDarwin { MKRELRO = "no"; }
+    // lib.optionalAttrs stdenv'.hostPlatform.isDarwin { MKRELRO = "no"; }
     // lib.optionalAttrs (stdenv'.cc.isClang or false) {
       HAVE_LLVM = lib.versions.major (lib.getVersion stdenv'.cc.cc);
     }
     // lib.optionalAttrs (stdenv'.cc.isGNU or false) {
       HAVE_GCC = lib.versions.major (lib.getVersion stdenv'.cc.cc);
     }
-    // lib.optionalAttrs (stdenv'.isx86_32) { USE_SSP = "no"; }
+    // lib.optionalAttrs (stdenv'.hostPlatform.isx86_32) { USE_SSP = "no"; }
     // lib.optionalAttrs (attrs.headersOnly or false) {
       installPhase = "includesPhase";
       dontBuild = true;
diff --git a/pkgs/os-specific/bsd/freebsd/pkgs/mtree.nix b/pkgs/os-specific/bsd/freebsd/pkgs/mtree.nix
index bbcaff3a1c6a..f1cf4f9bd220 100644
--- a/pkgs/os-specific/bsd/freebsd/pkgs/mtree.nix
+++ b/pkgs/os-specific/bsd/freebsd/pkgs/mtree.nix
@@ -18,7 +18,7 @@ mkDerivation {
       libmd
       libnetbsd
     ]
-    ++ lib.optional (stdenv.isFreeBSD) libutil;
+    ++ lib.optional (stdenv.hostPlatform.isFreeBSD) libutil;
 
   postPatch = ''
     ln -s $BSDSRCDIR/contrib/mknod/*.c $BSDSRCDIR/contrib/mknod/*.h $BSDSRCDIR/contrib/mtree
@@ -32,7 +32,7 @@ mkDerivation {
           "-lnetbsd"
         ]
         ++ lib.optional compatIsNeeded "-legacy"
-        ++ lib.optional stdenv.isFreeBSD "-lutil"
+        ++ lib.optional stdenv.hostPlatform.isFreeBSD "-lutil"
       )
     }"
   '';
diff --git a/pkgs/os-specific/bsd/netbsd/pkgs/compat/package.nix b/pkgs/os-specific/bsd/netbsd/pkgs/compat/package.nix
index 40113028bbf1..ad83b0650202 100644
--- a/pkgs/os-specific/bsd/netbsd/pkgs/compat/package.nix
+++ b/pkgs/os-specific/bsd/netbsd/pkgs/compat/package.nix
@@ -118,7 +118,7 @@ mkDerivation (
         install -D $BSDSRCDIR/common/include/rpc/types.h $dev/include/rpc/types.h
         sed -i '1s;^;#include "nbtool_config.h"\n;' $dev/include/rpc/types.h
       ''
-      + lib.optionalString stdenv.isDarwin ''
+      + lib.optionalString stdenv.hostPlatform.isDarwin ''
         mkdir -p $dev/include/ssp
         touch $dev/include/ssp/ssp.h
       ''
diff --git a/pkgs/os-specific/bsd/netbsd/pkgs/libcurses.nix b/pkgs/os-specific/bsd/netbsd/pkgs/libcurses.nix
index 8d61bcfdf7d9..75ca446b708c 100644
--- a/pkgs/os-specific/bsd/netbsd/pkgs/libcurses.nix
+++ b/pkgs/os-specific/bsd/netbsd/pkgs/libcurses.nix
@@ -16,12 +16,12 @@ mkDerivation {
       "-D__va_list=va_list"
       "-D__warn_references(a,b)="
     ]
-    ++ lib.optional stdenv.isDarwin "-D__strong_alias(a,b)="
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-D__strong_alias(a,b)="
   );
   propagatedBuildInputs = compatIfNeeded;
   MKDOC = "no"; # missing vfontedpr
   makeFlags = defaultMakeFlags ++ [ "LIBDO.terminfo=${libterminfo}/lib" ];
-  postPatch = lib.optionalString (!stdenv.isDarwin) ''
+  postPatch = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace $COMPONENT_PATH/printw.c \
       --replace "funopen(win, NULL, __winwrite, NULL, NULL)" NULL \
       --replace "__strong_alias(vwprintw, vw_printw)" 'extern int vwprintw(WINDOW*, const char*, va_list) __attribute__ ((alias ("vw_printw")));'
diff --git a/pkgs/os-specific/bsd/netbsd/pkgs/mkDerivation.nix b/pkgs/os-specific/bsd/netbsd/pkgs/mkDerivation.nix
index eb010749ada1..e926557fc444 100644
--- a/pkgs/os-specific/bsd/netbsd/pkgs/mkDerivation.nix
+++ b/pkgs/os-specific/bsd/netbsd/pkgs/mkDerivation.nix
@@ -104,14 +104,14 @@ lib.makeOverridable (
       # TODO should CC wrapper set this?
       CPP = "${stdenv'.cc.targetPrefix}cpp";
     }
-    // lib.optionalAttrs stdenv'.isDarwin { MKRELRO = "no"; }
+    // lib.optionalAttrs stdenv'.hostPlatform.isDarwin { MKRELRO = "no"; }
     // lib.optionalAttrs (stdenv'.cc.isClang or false) {
       HAVE_LLVM = lib.versions.major (lib.getVersion stdenv'.cc.cc);
     }
     // lib.optionalAttrs (stdenv'.cc.isGNU or false) {
       HAVE_GCC = lib.versions.major (lib.getVersion stdenv'.cc.cc);
     }
-    // lib.optionalAttrs (stdenv'.isx86_32) { USE_SSP = "no"; }
+    // lib.optionalAttrs (stdenv'.hostPlatform.isx86_32) { USE_SSP = "no"; }
     // lib.optionalAttrs (attrs.headersOnly or false) {
       installPhase = "includesPhase";
       dontBuild = true;
diff --git a/pkgs/os-specific/bsd/netbsd/pkgs/uudecode.nix b/pkgs/os-specific/bsd/netbsd/pkgs/uudecode.nix
index 1e58df16ceee..da3c9bb05dc0 100644
--- a/pkgs/os-specific/bsd/netbsd/pkgs/uudecode.nix
+++ b/pkgs/os-specific/bsd/netbsd/pkgs/uudecode.nix
@@ -6,6 +6,6 @@
 
 mkDerivation {
   path = "usr.bin/uudecode";
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isLinux "-DNO_BASE64";
-  NIX_LDFLAGS = lib.optional stdenv.isDarwin "-lresolv";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isLinux "-DNO_BASE64";
+  NIX_LDFLAGS = lib.optional stdenv.hostPlatform.isDarwin "-lresolv";
 }
diff --git a/pkgs/os-specific/darwin/apple-sdk-11.0/default.nix b/pkgs/os-specific/darwin/apple-sdk-11.0/default.nix
index 7262400c3eb0..c64f011c0534 100644
--- a/pkgs/os-specific/darwin/apple-sdk-11.0/default.nix
+++ b/pkgs/os-specific/darwin/apple-sdk-11.0/default.nix
@@ -127,7 +127,7 @@ let
       }) bindgenHook;
     };
 
-    callPackage = newScope (lib.optionalAttrs stdenv.isDarwin (stdenvs // rec {
+    callPackage = newScope (lib.optionalAttrs stdenv.hostPlatform.isDarwin (stdenvs // rec {
       inherit (pkgs.darwin.apple_sdk_11_0) xcodebuild rustPlatform;
       darwin = pkgs.darwin.overrideScope (_: prev: {
         inherit (prev.darwin.apple_sdk_11_0)
diff --git a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
index b642b993df0e..787fc93da1f6 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/diskdev_cmds/default.nix
@@ -2,8 +2,8 @@
 , libutil }:
 
 let
-  xnu-src = if stdenv.isAarch64 then macosPackages_11_0_1.xnu.src else xnu.src;
-  arch = if stdenv.isAarch64 then "arm" else "i386";
+  xnu-src = if stdenv.hostPlatform.isAarch64 then macosPackages_11_0_1.xnu.src else xnu.src;
+  arch = if stdenv.hostPlatform.isAarch64 then "arm" else "i386";
 in appleDerivation {
   patches = [
     # Fixes a build failure with newer versions of clang that make implicit int an error.
diff --git a/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix b/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix
index 1ba9a278ecc5..20a34e814d42 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/xnu/default.nix
@@ -5,7 +5,7 @@
 }:
 
 appleDerivation' (if headersOnly then stdenvNoCC else stdenv) (
-  let arch = if stdenv.isx86_64 then "x86_64" else "arm64";
+  let arch = if stdenv.hostPlatform.isx86_64 then "x86_64" else "arm64";
   in
   {
   depsBuildBuild = [ buildPackages.stdenv.cc ];
diff --git a/pkgs/os-specific/darwin/goku/default.nix b/pkgs/os-specific/darwin/goku/default.nix
index 13aadfce2404..4babe83c6351 100644
--- a/pkgs/os-specific/darwin/goku/default.nix
+++ b/pkgs/os-specific/darwin/goku/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
   pname = "goku";
   version = "0.6.0";
 
-  src = if stdenv.isAarch64 then
+  src = if stdenv.hostPlatform.isAarch64 then
     fetchurl {
       url = "https://github.com/yqrashawn/GokuRakuJoudo/releases/download/v${version}/goku-arm.zip";
       hash = "sha256-TIoda2kDckK1FBLAmKudsDs3LXO4J0KWiAD2JlFb4rk=";
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     joker
   ];
 
-  sourceRoot = if stdenv.isAarch64 then "goku" else ".";
+  sourceRoot = if stdenv.hostPlatform.isAarch64 then "goku" else ".";
 
   installPhase = ''
     chmod +x goku
diff --git a/pkgs/os-specific/darwin/noah/default.nix b/pkgs/os-specific/darwin/noah/default.nix
index 502a165c33d4..ed20f67e48e9 100644
--- a/pkgs/os-specific/darwin/noah/default.nix
+++ b/pkgs/os-specific/darwin/noah/default.nix
@@ -21,6 +21,6 @@ stdenv.mkDerivation rec {
     maintainers = [ ];
     platforms = platforms.darwin;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/os-specific/darwin/openwith/default.nix b/pkgs/os-specific/darwin/openwith/default.nix
index d28ed4942821..dbbd94fe4363 100644
--- a/pkgs/os-specific/darwin/openwith/default.nix
+++ b/pkgs/os-specific/darwin/openwith/default.nix
@@ -2,7 +2,7 @@
 
 let
   inherit (swiftPackages) apple_sdk stdenv swift;
-  arch = if stdenv.isAarch64 then "arm64" else "x86_64";
+  arch = if stdenv.hostPlatform.isAarch64 then "arm64" else "x86_64";
 in
 stdenv.mkDerivation rec {
   pname = "openwith";
diff --git a/pkgs/os-specific/linux/afuse/default.nix b/pkgs/os-specific/linux/afuse/default.nix
index df64c0d1f56c..33d950b76cd6 100644
--- a/pkgs/os-specific/linux/afuse/default.nix
+++ b/pkgs/os-specific/linux/afuse/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ fuse ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix the build on macOS with macFUSE installed
     substituteInPlace configure.ac --replace \
       'export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH' \
diff --git a/pkgs/os-specific/linux/dpdk/default.nix b/pkgs/os-specific/linux/dpdk/default.nix
index 3fd703c7ce1e..f49a723e2b0a 100644
--- a/pkgs/os-specific/linux/dpdk/default.nix
+++ b/pkgs/os-specific/linux/dpdk/default.nix
@@ -6,8 +6,8 @@
 , withExamples ? []
 , shared ? false
 , machine ? (
-    if stdenv.isx86_64 then "nehalem"
-    else if stdenv.isAarch64 then "generic"
+    if stdenv.hostPlatform.isx86_64 then "nehalem"
+    else if stdenv.hostPlatform.isAarch64 then "generic"
     else null
   )
 }:
diff --git a/pkgs/os-specific/linux/firmware/raspberrypi/armstubs.nix b/pkgs/os-specific/linux/firmware/raspberrypi/armstubs.nix
index 3f1a0ed04bb1..0393174d889d 100644
--- a/pkgs/os-specific/linux/firmware/raspberrypi/armstubs.nix
+++ b/pkgs/os-specific/linux/firmware/raspberrypi/armstubs.nix
@@ -32,8 +32,8 @@ stdenv.mkDerivation {
     "OBJCOPY7=${stdenv.cc.targetPrefix}objcopy"
     "OBJDUMP7=${stdenv.cc.targetPrefix}objdump"
   ]
-  ++ optionals (stdenv.isAarch64) [ "armstub8.bin" "armstub8-gic.bin" ]
-  ++ optionals (stdenv.isAarch32) [ "armstub7.bin" "armstub8-32.bin" "armstub8-32-gic.bin" ]
+  ++ optionals (stdenv.hostPlatform.isAarch64) [ "armstub8.bin" "armstub8-gic.bin" ]
+  ++ optionals (stdenv.hostPlatform.isAarch32) [ "armstub7.bin" "armstub8-32.bin" "armstub8-32-gic.bin" ]
   ;
 
   installPhase = ''
diff --git a/pkgs/os-specific/linux/firmware/raspberrypi/default.nix b/pkgs/os-specific/linux/firmware/raspberrypi/default.nix
index 5dede06d9269..02db2a2c82ad 100644
--- a/pkgs/os-specific/linux/firmware/raspberrypi/default.nix
+++ b/pkgs/os-specific/linux/firmware/raspberrypi/default.nix
@@ -28,6 +28,6 @@ stdenvNoCC.mkDerivation rec {
     maintainers = with maintainers; [ dezgeg ];
     # Hash mismatch on source, mystery.
     # Maybe due to https://github.com/NixOS/nix/issues/847
-    broken = stdenvNoCC.isDarwin;
+    broken = stdenvNoCC.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/os-specific/linux/fuse/common.nix b/pkgs/os-specific/linux/fuse/common.nix
index f4b8bfc5661a..cadf176b7c6e 100644
--- a/pkgs/os-specific/linux/fuse/common.nix
+++ b/pkgs/os-specific/linux/fuse/common.nix
@@ -24,7 +24,7 @@ in stdenv.mkDerivation rec {
 
   patches =
     lib.optional
-      (!isFuse3 && (stdenv.isAarch64 || stdenv.hostPlatform.isLoongArch64))
+      (!isFuse3 && (stdenv.hostPlatform.isAarch64 || stdenv.hostPlatform.isLoongArch64))
       (fetchpatch {
         url = "https://github.com/libfuse/libfuse/commit/914871b20a901e3e1e981c92bc42b1c93b7ab81b.patch";
         sha256 = "1w4j6f1awjrycycpvmlv0x5v9gprllh4dnbjxl4dyl2jgbkaw6pa";
diff --git a/pkgs/os-specific/linux/guvcview/default.nix b/pkgs/os-specific/linux/guvcview/default.nix
index e41f5c8e3c52..52a71d57199e 100644
--- a/pkgs/os-specific/linux/guvcview/default.nix
+++ b/pkgs/os-specific/linux/guvcview/default.nix
@@ -13,7 +13,7 @@
 , gsl
 , libpng
 , sfml
-, pulseaudioSupport ? config.pulseaudio or stdenv.isLinux
+, pulseaudioSupport ? config.pulseaudio or stdenv.hostPlatform.isLinux
 , libpulseaudio ? null
 , useQt ? false
 , qtbase ? null
diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index aeb78f1ad38a..d3226b767076 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -182,7 +182,7 @@ let
 
       # Collect ECC errors and retire pages that fail too often
       RAS_CEC                   = yes;
-    } // lib.optionalAttrs (stdenv.is32bit) {
+    } // lib.optionalAttrs (stdenv.hostPlatform.is32bit) {
       # Enable access to the full memory range (aka PAE) on 32-bit architectures
       # This check isn't super accurate but it's close enough
       HIGHMEM                   = option yes;
@@ -214,7 +214,7 @@ let
     timer = {
       # Enable Full Dynticks System.
       # NO_HZ_FULL depends on HAVE_VIRT_CPU_ACCOUNTING_GEN depends on 64BIT
-      NO_HZ_FULL = lib.mkIf stdenv.is64bit yes;
+      NO_HZ_FULL = lib.mkIf stdenv.hostPlatform.is64bit yes;
     };
 
     # Enable NUMA.
@@ -411,7 +411,7 @@ let
     };
 
     video = let
-      whenHasDevicePrivate = lib.mkIf (!stdenv.isx86_32);
+      whenHasDevicePrivate = lib.mkIf (!stdenv.hostPlatform.isx86_32);
     in {
       # compile in DRM so simpledrm can load before initrd if necessary
       AGP = yes;
@@ -836,9 +836,9 @@ let
       KSM = yes;
       VIRT_DRIVERS = yes;
       # We need 64 GB (PAE) support for Xen guest support
-      HIGHMEM64G = { optional = true; tristate = lib.mkIf (!stdenv.is64bit) "y";};
+      HIGHMEM64G = { optional = true; tristate = lib.mkIf (!stdenv.hostPlatform.is64bit) "y";};
 
-      VFIO_PCI_VGA = lib.mkIf stdenv.is64bit yes;
+      VFIO_PCI_VGA = lib.mkIf stdenv.hostPlatform.is64bit yes;
 
       UDMABUF = yes;
 
@@ -940,7 +940,7 @@ let
 
       # Allows soft-dirty tracking on pages, used by CRIU.
       # See https://docs.kernel.org/admin-guide/mm/soft-dirty.html
-      MEM_SOFT_DIRTY = lib.mkIf (!stdenv.isx86_32) yes;
+      MEM_SOFT_DIRTY = lib.mkIf (!stdenv.hostPlatform.isx86_32) yes;
     };
 
     misc = let
diff --git a/pkgs/os-specific/linux/kernel/generic.nix b/pkgs/os-specific/linux/kernel/generic.nix
index 74e603623412..fdfc78235226 100644
--- a/pkgs/os-specific/linux/kernel/generic.nix
+++ b/pkgs/os-specific/linux/kernel/generic.nix
@@ -84,7 +84,7 @@ lib.makeOverridable ({ # The kernel source tarball.
 # cgit) that are needed here should be included directly in Nixpkgs as
 # files.
 
-assert stdenv.isLinux;
+assert stdenv.hostPlatform.isLinux;
 
 let
   # Dirty hack to make sure that `version` & `src` have
diff --git a/pkgs/os-specific/linux/kernel/linux-rpi.nix b/pkgs/os-specific/linux/kernel/linux-rpi.nix
index 8ea483fc2579..54c5ace09154 100644
--- a/pkgs/os-specific/linux/kernel/linux-rpi.nix
+++ b/pkgs/os-specific/linux/kernel/linux-rpi.nix
@@ -72,7 +72,7 @@ lib.overrideDerivation (buildLinux (args // {
   # Make copies of the DTBs named after the upstream names so that U-Boot finds them.
   # This is ugly as heck, but I don't know a better solution so far.
   postFixup = ''
-    dtbDir=${if stdenv.isAarch64 then "$out/dtbs/broadcom" else "$out/dtbs"}
+    dtbDir=${if stdenv.hostPlatform.isAarch64 then "$out/dtbs/broadcom" else "$out/dtbs"}
     rm $dtbDir/bcm283*.dtb
     copyDTB() {
       cp -v "$dtbDir/$1" "$dtbDir/$2"
diff --git a/pkgs/os-specific/linux/kernel/xanmod-kernels.nix b/pkgs/os-specific/linux/kernel/xanmod-kernels.nix
index e063a4148edc..5b6f24ae3183 100644
--- a/pkgs/os-specific/linux/kernel/xanmod-kernels.nix
+++ b/pkgs/os-specific/linux/kernel/xanmod-kernels.nix
@@ -59,7 +59,7 @@ let
       branch = lib.versions.majorMinor version;
       maintainers = with lib.maintainers; [ moni lovesegfault atemu shawn8901 zzzsy ];
       description = "Built with custom settings and new features built to provide a stable, responsive and smooth desktop experience";
-      broken = stdenv.isAarch64;
+      broken = stdenv.hostPlatform.isAarch64;
     };
   } // (args.argsOverride or { }));
 in
diff --git a/pkgs/os-specific/linux/kernel/zen-kernels.nix b/pkgs/os-specific/linux/kernel/zen-kernels.nix
index 113627e0fd5d..9b1dbc3c9bbe 100644
--- a/pkgs/os-specific/linux/kernel/zen-kernels.nix
+++ b/pkgs/os-specific/linux/kernel/zen-kernels.nix
@@ -120,7 +120,7 @@ let
       maintainers = with lib.maintainers; [ thiagokokada jerrysm64 ];
       description = "Built using the best configuration and kernel sources for desktop, multimedia, and gaming workloads." +
         lib.optionalString isLqx " (Same as linux_zen, but less aggressive release schedule and additional extra config)";
-      broken = stdenv.isAarch64;
+      broken = stdenv.hostPlatform.isAarch64;
     };
 
   } // (args.argsOverride or { }));
diff --git a/pkgs/os-specific/linux/libaio/default.nix b/pkgs/os-specific/linux/libaio/default.nix
index 4986f0abf4a3..080571ad71d1 100644
--- a/pkgs/os-specific/linux/libaio/default.nix
+++ b/pkgs/os-specific/linux/libaio/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     "prefix=${placeholder "out"}"
   ] ++ lib.optional stdenv.hostPlatform.isStatic "ENABLE_SHARED=0";
 
-  hardeningDisable = lib.optional (stdenv.isi686) "stackprotector";
+  hardeningDisable = lib.optional (stdenv.hostPlatform.isi686) "stackprotector";
 
   checkTarget = "partcheck"; # "check" needs root
 
diff --git a/pkgs/os-specific/linux/lsirec/default.nix b/pkgs/os-specific/linux/lsirec/default.nix
index 10da88b691d9..aab36459ae95 100644
--- a/pkgs/os-specific/linux/lsirec/default.nix
+++ b/pkgs/os-specific/linux/lsirec/default.nix
@@ -33,6 +33,6 @@ stdenv.mkDerivation rec {
     license = licenses.bsd2;
     maintainers = with maintainers; [ Luflosi ];
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/os-specific/linux/mwprocapture/default.nix b/pkgs/os-specific/linux/mwprocapture/default.nix
index b0513f5663d4..c83596a1fbe0 100644
--- a/pkgs/os-specific/linux/mwprocapture/default.nix
+++ b/pkgs/os-specific/linux/mwprocapture/default.nix
@@ -2,7 +2,7 @@
 
 let
   bits =
-    if stdenv.is64bit then "64"
+    if stdenv.hostPlatform.is64bit then "64"
     else "32";
 
   libpath = lib.makeLibraryPath [ stdenv.cc.cc stdenv.cc.libc alsa-lib ];
diff --git a/pkgs/os-specific/linux/new-lg4ff/default.nix b/pkgs/os-specific/linux/new-lg4ff/default.nix
index a92ee9ae64b5..8eed8edbc166 100644
--- a/pkgs/os-specific/linux/new-lg4ff/default.nix
+++ b/pkgs/os-specific/linux/new-lg4ff/default.nix
@@ -31,6 +31,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Only;
     maintainers = with maintainers; [ matthiasbenaets ];
     platforms = platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/os-specific/linux/nfs-utils/default.nix b/pkgs/os-specific/linux/nfs-utils/default.nix
index 74f560992ade..5f0e62b1b811 100644
--- a/pkgs/os-specific/linux/nfs-utils/default.nix
+++ b/pkgs/os-specific/linux/nfs-utils/default.nix
@@ -106,7 +106,7 @@ stdenv.mkDerivation rec {
     '';
 
   # One test fails on mips.
-  # doCheck = !stdenv.isMips;
+  # doCheck = !stdenv.hostPlatform.isMips;
   # https://bugzilla.kernel.org/show_bug.cgi?id=203793
   doCheck = false;
 
diff --git a/pkgs/os-specific/linux/nsncd/default.nix b/pkgs/os-specific/linux/nsncd/default.nix
index 9acef3cd9342..4e0b76dac223 100644
--- a/pkgs/os-specific/linux/nsncd/default.nix
+++ b/pkgs/os-specific/linux/nsncd/default.nix
@@ -44,6 +44,6 @@ rustPlatform.buildRustPackage {
       picnoir
     ];
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/os-specific/linux/pam_p11/default.nix b/pkgs/os-specific/linux/pam_p11/default.nix
index 0a7e02f4ad81..a1e1dc109a15 100644
--- a/pkgs/os-specific/linux/pam_p11/default.nix
+++ b/pkgs/os-specific/linux/pam_p11/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ pam libp11.passthru.openssl libp11 ]
-    ++ lib.optionals stdenv.isDarwin [ libintl ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libintl ];
 
   meta = with lib; {
     homepage = "https://github.com/OpenSC/pam_p11";
diff --git a/pkgs/os-specific/linux/pax-utils/default.nix b/pkgs/os-specific/linux/pax-utils/default.nix
index dcecfa4c13b8..ac4cae906a2b 100644
--- a/pkgs/os-specific/linux/pax-utils/default.nix
+++ b/pkgs/os-specific/linux/pax-utils/default.nix
@@ -4,7 +4,7 @@
 , buildPackages
 , docbook_xml_dtd_44
 , docbook_xsl
-, withLibcap ? stdenv.isLinux, libcap
+, withLibcap ? stdenv.hostPlatform.isLinux, libcap
 , pkg-config
 , meson
 , ninja
diff --git a/pkgs/os-specific/linux/prl-tools/default.nix b/pkgs/os-specific/linux/prl-tools/default.nix
index 4474b07229c2..15ca9f9212e4 100644
--- a/pkgs/os-specific/linux/prl-tools/default.nix
+++ b/pkgs/os-specific/linux/prl-tools/default.nix
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
 
     undmg $src
     export sourceRoot=prl-tools-build
-    7z x "Parallels Desktop.app/Contents/Resources/Tools/prl-tools-lin${lib.optionalString stdenv.isAarch64 "-arm"}.iso" -o$sourceRoot
+    7z x "Parallels Desktop.app/Contents/Resources/Tools/prl-tools-lin${lib.optionalString stdenv.hostPlatform.isAarch64 "-arm"}.iso" -o$sourceRoot
     ( cd $sourceRoot/kmods; tar -xaf prl_mod.tar.gz )
 
     runHook postUnpack
@@ -111,12 +111,12 @@ stdenv.mkDerivation (finalAttrs: {
       cp prl_fs/SharedFolders/Guest/Linux/prl_fs/prl_fs.ko $out/lib/modules/${kernelVersion}/extra
       cp prl_fs_freeze/Snapshot/Guest/Linux/prl_freeze/prl_fs_freeze.ko $out/lib/modules/${kernelVersion}/extra
       cp prl_tg/Toolgate/Guest/Linux/prl_tg/prl_tg.ko $out/lib/modules/${kernelVersion}/extra
-      ${lib.optionalString stdenv.isAarch64
+      ${lib.optionalString stdenv.hostPlatform.isAarch64
       "cp prl_notifier/Installation/lnx/prl_notifier/prl_notifier.ko $out/lib/modules/${kernelVersion}/extra"}
     )
 
     ( # tools
-      cd tools/tools${if stdenv.isAarch64 then "-arm64" else if stdenv.isx86_64 then "64" else "32"}
+      cd tools/tools${if stdenv.hostPlatform.isAarch64 then "-arm64" else if stdenv.hostPlatform.isx86_64 then "64" else "32"}
       mkdir -p $out/lib
 
       # prltoolsd contains hardcoded /bin/bash path
diff --git a/pkgs/os-specific/linux/procps-ng/default.nix b/pkgs/os-specific/linux/procps-ng/default.nix
index da2c80934172..32a7f7865b12 100644
--- a/pkgs/os-specific/linux/procps-ng/default.nix
+++ b/pkgs/os-specific/linux/procps-ng/default.nix
@@ -14,7 +14,7 @@
   # system (or very similar like that found in Cygwin). The one
   # exception is ‘watch’ which is portable enough to run on pretty much
   # any UNIX-compatible system.
-, watchOnly ? !(stdenv.isLinux || stdenv.isCygwin)
+, watchOnly ? !(stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isCygwin)
 
 , binlore
 , procps
diff --git a/pkgs/os-specific/linux/rasdaemon/default.nix b/pkgs/os-specific/linux/rasdaemon/default.nix
index 35478732fb8c..5a1df895b4c0 100644
--- a/pkgs/os-specific/linux/rasdaemon/default.nix
+++ b/pkgs/os-specific/linux/rasdaemon/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     libtraceevent
     (perl.withPackages (ps: with ps; [ DBI DBDSQLite ]))
   ]
-  ++ lib.optionals (!stdenv.isAarch64) [ dmidecode ];
+  ++ lib.optionals (!stdenv.hostPlatform.isAarch64) [ dmidecode ];
 
   configureFlags = [
     "--sysconfdir=/etc"
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
     substituteInPlace $out/bin/ras-mc-ctl \
       --replace 'find_prog ("modprobe")  or exit (1)' '"${kmod}/bin/modprobe"'
   ''
-  + lib.optionalString (!stdenv.isAarch64) ''
+  + lib.optionalString (!stdenv.hostPlatform.isAarch64) ''
     substituteInPlace $out/bin/ras-mc-ctl \
       --replace 'find_prog ("dmidecode")' '"${dmidecode}/bin/dmidecode"'
   '';
diff --git a/pkgs/os-specific/linux/rtl8821ce/default.nix b/pkgs/os-specific/linux/rtl8821ce/default.nix
index 434397ebc7c1..532ed4998918 100644
--- a/pkgs/os-specific/linux/rtl8821ce/default.nix
+++ b/pkgs/os-specific/linux/rtl8821ce/default.nix
@@ -45,6 +45,6 @@ stdenv.mkDerivation (finalAttrs: {
       defelo
     ];
     broken =
-      stdenv.isAarch64 || ((lib.versions.majorMinor kernel.version) == "5.4" && kernel.isHardened);
+      stdenv.hostPlatform.isAarch64 || ((lib.versions.majorMinor kernel.version) == "5.4" && kernel.isHardened);
   };
 })
diff --git a/pkgs/os-specific/linux/shadow/default.nix b/pkgs/os-specific/linux/shadow/default.nix
index 98cb0c061ef5..682434fa0372 100644
--- a/pkgs/os-specific/linux/shadow/default.nix
+++ b/pkgs/os-specific/linux/shadow/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ libbsd libxcrypt ]
-    ++ lib.optional (pam != null && stdenv.isLinux) pam
+    ++ lib.optional (pam != null && stdenv.hostPlatform.isLinux) pam
     ++ lib.optional withTcb tcb;
 
   patches = [
diff --git a/pkgs/os-specific/linux/tuxedo-keyboard/default.nix b/pkgs/os-specific/linux/tuxedo-keyboard/default.nix
index 2e0a13846f32..23285d5e26d2 100644
--- a/pkgs/os-specific/linux/tuxedo-keyboard/default.nix
+++ b/pkgs/os-specific/linux/tuxedo-keyboard/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   meta = {
-    broken = stdenv.isAarch64 || (lib.versionOlder kernel.version "5.5");
+    broken = stdenv.hostPlatform.isAarch64 || (lib.versionOlder kernel.version "5.5");
     description = "Keyboard and hardware I/O driver for TUXEDO Computers laptops";
     homepage = "https://github.com/tuxedocomputers/tuxedo-keyboard/";
     license = lib.licenses.gpl3Plus;
diff --git a/pkgs/os-specific/linux/util-linux/default.nix b/pkgs/os-specific/linux/util-linux/default.nix
index e393bf1ac08e..61b52ede774e 100644
--- a/pkgs/os-specific/linux/util-linux/default.nix
+++ b/pkgs/os-specific/linux/util-linux/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, pkg-config, zlib, shadow
-, capabilitiesSupport ? stdenv.isLinux
+, capabilitiesSupport ? stdenv.hostPlatform.isLinux
 , libcap_ng
 , libxcrypt
 , ncursesSupport ? true
@@ -12,8 +12,8 @@
 , translateManpages ? true
 , po4a
 , installShellFiles
-, writeSupport ? stdenv.isLinux
-, shadowSupport ? stdenv.isLinux
+, writeSupport ? stdenv.hostPlatform.isLinux
+, shadowSupport ? stdenv.hostPlatform.isLinux
 , memstreamHook
 , gitUpdater
 }:
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   # the greater util-linux toolset.
   # Compatibility is maintained by symlinking the binaries from the
   # smaller outputs in the bin output.
-  outputs = [ "bin" "dev" "out" "lib" "man" ] ++ lib.optionals stdenv.isLinux [ "mount" ] ++ [ "login" ] ++ lib.optionals stdenv.isLinux [ "swap" ];
+  outputs = [ "bin" "dev" "out" "lib" "man" ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "mount" ] ++ [ "login" ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "swap" ];
   separateDebugInfo = true;
 
   postPatch = ''
@@ -91,7 +91,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     moveToOutput bin/mount "$mount"
     moveToOutput bin/umount "$mount"
     ln -svf "$mount/bin/"* $bin/bin/
@@ -101,7 +101,7 @@ stdenv.mkDerivation rec {
     moveToOutput sbin/sulogin "$login"
     prefix=$login _moveSbin
     ln -svf "$login/bin/"* $bin/bin/
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
 
     moveToOutput sbin/swapon "$swap"
     moveToOutput sbin/swapoff "$swap"
diff --git a/pkgs/servers/amqp/rabbitmq-server/default.nix b/pkgs/servers/amqp/rabbitmq-server/default.nix
index 68cad9be1a69..f741858b011a 100644
--- a/pkgs/servers/amqp/rabbitmq-server/default.nix
+++ b/pkgs/servers/amqp/rabbitmq-server/default.nix
@@ -33,7 +33,7 @@ let
     procps
     gnused
     coreutils # used by helper scripts
-  ] ++ lib.optionals stdenv.isLinux [ systemd ]); # for systemd unit activation check
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ systemd ]); # for systemd unit activation check
 in
 
 stdenv.mkDerivation rec {
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ unzip xmlto docbook_xml_dtd_45 docbook_xsl zip rsync python3 ];
 
   buildInputs = [ erlang elixir libxml2 libxslt glibcLocales ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit Carbon Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit Carbon Cocoa ];
 
   outputs = [ "out" "man" "doc" ];
 
diff --git a/pkgs/servers/apache-airflow/python-package.nix b/pkgs/servers/apache-airflow/python-package.nix
index 14c39ede5a85..d178a3d15064 100644
--- a/pkgs/servers/apache-airflow/python-package.nix
+++ b/pkgs/servers/apache-airflow/python-package.nix
@@ -244,7 +244,7 @@ buildPythonPackage rec {
     # https://github.com/apache/airflow/issues/33854
     substituteInPlace pyproject.toml \
       --replace '[project]' $'[project]\nname = "apache-airflow"\nversion = "${version}"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix failing test on Hydra
     substituteInPlace airflow/utils/db.py \
       --replace "/tmp/sqlite_default.db" "$TMPDIR/sqlite_default.db"
@@ -287,7 +287,7 @@ buildPythonPackage rec {
     "tests/core/test_core.py"
   ];
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "bash_operator_kill" # psutil.AccessDenied
   ];
 
diff --git a/pkgs/servers/bindle/default.nix b/pkgs/servers/bindle/default.nix
index b9ff3937e973..bfd9b2872bc3 100644
--- a/pkgs/servers/bindle/default.nix
+++ b/pkgs/servers/bindle/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
   doCheck = false; # Tests require a network
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   cargoHash = "sha256-RECEeo0uoGO5bBe+r++zpTjYYX3BIkT58uht2MLYkN0=";
 
diff --git a/pkgs/servers/binserve/default.nix b/pkgs/servers/binserve/default.nix
index 62cddd3e0dbf..3864c7929945 100644
--- a/pkgs/servers/binserve/default.nix
+++ b/pkgs/servers/binserve/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-Chm2xPB0BrLXSZslg9wnbDyHSJRQAvOtpH0Rw6w1q1s=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/servers/blockbook/default.nix b/pkgs/servers/blockbook/default.nix
index f4ffeeb33471..47eb65bf70d2 100644
--- a/pkgs/servers/blockbook/default.nix
+++ b/pkgs/servers/blockbook/default.nix
@@ -54,7 +54,7 @@ buildGoModule rec {
     "-lstdc++"
   ];
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ulimit -n 8192
   '';
 
diff --git a/pkgs/servers/clickhouse/default.nix b/pkgs/servers/clickhouse/default.nix
index 4b5071be7bd2..7589ae36304a 100644
--- a/pkgs/servers/clickhouse/default.nix
+++ b/pkgs/servers/clickhouse/default.nix
@@ -24,7 +24,7 @@
 let
   inherit (llvmPackages) stdenv;
   mkDerivation = (
-    if stdenv.isDarwin
+    if stdenv.hostPlatform.isDarwin
     then darwin.apple_sdk_11_0.llvmPackages_16.stdenv
     else llvmPackages.stdenv).mkDerivation;
 in mkDerivation rec {
@@ -83,10 +83,10 @@ in mkDerivation rec {
     python3
     perl
     llvmPackages.lld
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     nasm
     yasm
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     llvmPackages.bintools
     findutils
     darwin.bootstrap_cmds
@@ -96,7 +96,7 @@ in mkDerivation rec {
     rustPlatform.cargoSetupHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # their vendored version is too old and missing this patch: https://github.com/corrosion-rs/corrosion/pull/205
   corrosionSrc = if rustSupport then fetchFromGitHub {
@@ -154,7 +154,7 @@ in mkDerivation rec {
       --replace 'git rev-parse --show-toplevel' '$src'
     substituteInPlace utils/check-style/check-style \
       --replace 'git rev-parse --show-toplevel' '$src'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 's|gfind|find|' cmake/tools.cmake
     sed -i 's|ggrep|grep|' cmake/tools.cmake
   '' + lib.optionalString rustSupport ''
@@ -168,7 +168,7 @@ in mkDerivation rec {
     popd
 
     cargoSetupPostPatchHook() { true; }
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Make sure Darwin invokes lld.ld64 not lld.
     substituteInPlace cmake/tools.cmake \
       --replace '--ld-path=''${LLD_PATH}' '-fuse-ld=lld'
@@ -183,10 +183,10 @@ in mkDerivation rec {
   env = {
     NIX_CFLAGS_COMPILE =
       # undefined reference to '__sync_val_compare_and_swap_16'
-      lib.optionalString stdenv.isx86_64 " -mcx16" +
+      lib.optionalString stdenv.hostPlatform.isx86_64 " -mcx16" +
       # Silence ``-Wimplicit-const-int-float-conversion` error in MemoryTracker.cpp and
       # ``-Wno-unneeded-internal-declaration` TreeOptimizer.cpp.
-      lib.optionalString stdenv.isDarwin " -Wno-implicit-const-int-float-conversion -Wno-unneeded-internal-declaration";
+      lib.optionalString stdenv.hostPlatform.isDarwin " -Wno-implicit-const-int-float-conversion -Wno-unneeded-internal-declaration";
   };
 
   # https://github.com/ClickHouse/ClickHouse/issues/49988
diff --git a/pkgs/servers/code-server/default.nix b/pkgs/servers/code-server/default.nix
index 5fd0f7867dcd..5662dc5d333b 100644
--- a/pkgs/servers/code-server/default.nix
+++ b/pkgs/servers/code-server/default.nix
@@ -133,9 +133,9 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     xorg.libX11
     xorg.libxkbfile
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libsecret
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     CoreServices
@@ -246,7 +246,7 @@ stdenv.mkDerivation (finalAttrs: {
         xargs -I {} sh -c 'jq -e ".scripts.postinstall" {}/package.json >/dev/null && yarn --cwd {} postinstall --frozen-lockfile --offline || true'
     patchShebangs .
 
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Use prebuilt binary for @parcel/watcher, which requires macOS SDK 10.13+
     # (see issue #101229).
     pushd ./lib/vscode/remote/node_modules/@parcel/watcher
diff --git a/pkgs/servers/confluencepot/default.nix b/pkgs/servers/confluencepot/default.nix
index d1aa0031f20f..89233d2063d5 100644
--- a/pkgs/servers/confluencepot/default.nix
+++ b/pkgs/servers/confluencepot/default.nix
@@ -22,7 +22,7 @@ buildGoModule rec {
       --replace "confluence.html" "$out/share/confluence.html"
   '';
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mv $out/bin/confluencePot $out/bin/${pname}
   '';
 
diff --git a/pkgs/servers/coturn/default.nix b/pkgs/servers/coturn/default.nix
index 8578940b660c..061ea520731b 100644
--- a/pkgs/servers/coturn/default.nix
+++ b/pkgs/servers/coturn/default.nix
@@ -55,6 +55,6 @@ stdenv.mkDerivation rec {
     license = with licenses; [ bsd3 ];
     platforms = platforms.all;
     maintainers = with maintainers; [ _0x4A6F ];
-    broken = stdenv.isDarwin; # 2018-10-21
+    broken = stdenv.hostPlatform.isDarwin; # 2018-10-21
   };
 }
diff --git a/pkgs/servers/dante/default.nix b/pkgs/servers/dante/default.nix
index 278c518a8106..9b99f51aef59 100644
--- a/pkgs/servers/dante/default.nix
+++ b/pkgs/servers/dante/default.nix
@@ -16,11 +16,11 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ pam libkrb5 cyrus_sasl miniupnpc libxcrypt ];
 
-  configureFlags = if !stdenv.isDarwin
+  configureFlags = if !stdenv.hostPlatform.isDarwin
     then [ "--with-libc=libc.so.6" ]
     else [ "--with-libc=libc${stdenv.hostPlatform.extensions.sharedLibrary}" ];
 
-  dontAddDisableDepTrack = stdenv.isDarwin;
+  dontAddDisableDepTrack = stdenv.hostPlatform.isDarwin;
 
   patches = [
     # Fixes several issues with `osint.m4` that causes incorrect check failures when using newer
diff --git a/pkgs/servers/dendrite/default.nix b/pkgs/servers/dendrite/default.nix
index a590036ea5a2..bb72aeb170db 100644
--- a/pkgs/servers/dendrite/default.nix
+++ b/pkgs/servers/dendrite/default.nix
@@ -52,7 +52,7 @@ buildGoModule rec {
   '';
 
   # PostgreSQL's request for a shared memory segment exceeded your kernel's SHMALL parameter
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru.tests = {
     inherit (nixosTests) dendrite;
diff --git a/pkgs/servers/dico/default.nix b/pkgs/servers/dico/default.nix
index 658d477a483d..de43d3389b0b 100644
--- a/pkgs/servers/dico/default.nix
+++ b/pkgs/servers/dico/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   strictDeps = true;
 
   # ERROR: All 188 tests were run, 90 failed unexpectedly.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Flexible dictionary server and client implementing RFC 2229";
diff --git a/pkgs/servers/dns/bind/default.nix b/pkgs/servers/dns/bind/default.nix
index fde2c94306f2..545474200bf8 100644
--- a/pkgs/servers/dns/bind/default.nix
+++ b/pkgs/servers/dns/bind/default.nix
@@ -40,10 +40,10 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ perl pkg-config ];
   buildInputs = [ libidn2 libtool libxml2 openssl libuv nghttp2 jemalloc ]
-    ++ lib.optional stdenv.isLinux libcap
+    ++ lib.optional stdenv.hostPlatform.isLinux libcap
     ++ lib.optional enableGSSAPI libkrb5
     ++ lib.optional enablePython (python3.withPackages (ps: with ps; [ ply ]))
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
diff --git a/pkgs/servers/dns/coredns/default.nix b/pkgs/servers/dns/coredns/default.nix
index bb85bdb320e5..3cda1b6cf1dc 100644
--- a/pkgs/servers/dns/coredns/default.nix
+++ b/pkgs/servers/dns/coredns/default.nix
@@ -62,7 +62,7 @@ in buildGoModule rec {
     # it's a lint rather than a test of functionality, so it's safe to disable.
     substituteInPlace test/presubmit_test.go \
       --replace "TestImportOrdering" "SkipImportOrdering"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # loopback interface is lo0 on macos
     sed -E -i 's/\blo\b/lo0/' plugin/bind/setup_test.go
 
diff --git a/pkgs/servers/dns/doh-proxy-rust/default.nix b/pkgs/servers/dns/doh-proxy-rust/default.nix
index 244ec35a6768..5de2732b186a 100644
--- a/pkgs/servers/dns/doh-proxy-rust/default.nix
+++ b/pkgs/servers/dns/doh-proxy-rust/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-eXPAn2ziSdciZa6YrOIa7y7Lms681X+yVAD9HrvsZHg=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security libiconv ];
 
   passthru.tests = { inherit (nixosTests) doh-proxy-rust; };
 
diff --git a/pkgs/servers/dns/knot-dns/default.nix b/pkgs/servers/dns/knot-dns/default.nix
index fb71f0e3442f..5c3c5df26210 100644
--- a/pkgs/servers/dns/knot-dns/default.nix
+++ b/pkgs/servers/dns/knot-dns/default.nix
@@ -43,10 +43,10 @@ stdenv.mkDerivation rec {
     libmaxminddb # optional for geoip module (it's tiny)
     # without sphinx &al. for developer documentation
     fstrm protobufc # dnstap support
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap_ng systemd
     xdp-tools libbpf libmnl # XDP support (it's Linux kernel API)
-  ] ++ lib.optional stdenv.isDarwin zlib; # perhaps due to gnutls
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin zlib; # perhaps due to gnutls
 
   enableParallelBuilding = true;
 
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
 
   passthru.tests = {
     inherit knot-resolver;
-  } // lib.optionalAttrs stdenv.isLinux {
+  } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
     inherit (nixosTests) knot kea;
     prometheus-exporter = nixosTests.prometheus-exporters.knot;
     # Some dependencies are very version-sensitive, so the might get dropped
diff --git a/pkgs/servers/dns/knot-resolver/default.nix b/pkgs/servers/dns/knot-resolver/default.nix
index 198c7835fd8b..315a1e3aaf0d 100644
--- a/pkgs/servers/dns/knot-resolver/default.nix
+++ b/pkgs/servers/dns/knot-resolver/default.nix
@@ -64,7 +64,7 @@ unwrapped = stdenv.mkDerivation rec {
   # http://knot-resolver.readthedocs.io/en/latest/build.html#requirements
   buildInputs = [ knot-dns lua.lua libuv gnutls lmdb ]
     ## the rest are optional dependencies
-    ++ optionals stdenv.isLinux [ /*lib*/systemd libcap_ng ]
+    ++ optionals stdenv.hostPlatform.isLinux [ /*lib*/systemd libcap_ng ]
     ++ [ jemalloc nghttp2 ]
     ++ [ fstrm protobufc ] # dnstap support
     ;
@@ -78,7 +78,7 @@ unwrapped = stdenv.mkDerivation rec {
   ]
   ++ optional doInstallCheck "-Dunit_tests=enabled"
   ++ optional doInstallCheck "-Dconfig_tests=enabled"
-  ++ optional stdenv.isLinux "-Dsystemd_files=enabled" # used by NixOS service
+  ++ optional stdenv.hostPlatform.isLinux "-Dsystemd_files=enabled" # used by NixOS service
     #"-Dextra_tests=enabled" # not suitable as in-distro tests; many deps, too.
   ;
 
diff --git a/pkgs/servers/dns/pdns/default.nix b/pkgs/servers/dns/pdns/default.nix
index 1037c88229aa..e7633761a5d7 100644
--- a/pkgs/servers/dns/pdns/default.nix
+++ b/pkgs/servers/dns/pdns/default.nix
@@ -96,7 +96,7 @@ stdenv.mkDerivation (finalAttrs: {
     description = "Authoritative DNS server";
     homepage = "https://www.powerdns.com";
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     license = licenses.gpl2Only;
     maintainers = with maintainers; [ mic92 disassembler nickcao ];
   };
diff --git a/pkgs/servers/domoticz/default.nix b/pkgs/servers/domoticz/default.nix
index 72b4d71a62af..7f89645b3f97 100644
--- a/pkgs/servers/domoticz/default.nix
+++ b/pkgs/servers/domoticz/default.nix
@@ -85,7 +85,7 @@ stdenv.mkDerivation rec {
     changelog = "https://github.com/domoticz/domoticz/blob/${version}/History.txt";
     license = licenses.gpl3Plus;
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/domoticz.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/domoticz.x86_64-darwin
     mainProgram = "domoticz";
   };
 }
diff --git a/pkgs/servers/fedigroups/default.nix b/pkgs/servers/fedigroups/default.nix
index e823a5017ef0..764dee9ff4b1 100644
--- a/pkgs/servers/fedigroups/default.nix
+++ b/pkgs/servers/fedigroups/default.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optional stdenv.isDarwin Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     homepage = "https://git.ondrovo.com/MightyPork/group-actor#fedi-groups";
diff --git a/pkgs/servers/foundationdb/cmake.nix b/pkgs/servers/foundationdb/cmake.nix
index bc0a17166631..287809a451d7 100644
--- a/pkgs/servers/foundationdb/cmake.nix
+++ b/pkgs/servers/foundationdb/cmake.nix
@@ -81,7 +81,7 @@ let
           # Needed with GCC 12
           "-Wno-error=missing-template-keyword"
           # Needed to compile on aarch64
-          (lib.optionalString stdenv.isAarch64 "-march=armv8-a+crc")
+          (lib.optionalString stdenv.hostPlatform.isAarch64 "-march=armv8-a+crc")
         ];
 
         inherit patches;
diff --git a/pkgs/servers/frr/default.nix b/pkgs/servers/frr/default.nix
index 76d0dc8b2a8f..bcb829d716bf 100644
--- a/pkgs/servers/frr/default.nix
+++ b/pkgs/servers/frr/default.nix
@@ -127,7 +127,7 @@ stdenv.mkDerivation (finalAttrs: {
     readline
     rtrlib
     zeromq
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libcap
   ] ++ lib.optionals snmpSupport [
     net-snmp
diff --git a/pkgs/servers/ftp/bftpd/default.nix b/pkgs/servers/ftp/bftpd/default.nix
index 0aba1e90a164..895e3cd063fc 100644
--- a/pkgs/servers/ftp/bftpd/default.nix
+++ b/pkgs/servers/ftp/bftpd/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   # utmp.h is deprecated on aarch64-darwin
-  postPatch = lib.optionals (stdenv.isDarwin && stdenv.isAarch64) ''
+  postPatch = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     for file in login.*; do
       substituteInPlace $file --replace "#ifdef HAVE_UTMP_H" "#if 0"
     done
diff --git a/pkgs/servers/gemini/stargazer/default.nix b/pkgs/servers/gemini/stargazer/default.nix
index 8aae6fa7b7fe..4c6b178ae37b 100644
--- a/pkgs/servers/gemini/stargazer/default.nix
+++ b/pkgs/servers/gemini/stargazer/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles scdoc ];
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     scdoc < doc/stargazer.scd  > stargazer.1
diff --git a/pkgs/servers/geospatial/martin/default.nix b/pkgs/servers/geospatial/martin/default.nix
index d871c79d6c20..dbd1c527ef6a 100644
--- a/pkgs/servers/geospatial/martin/default.nix
+++ b/pkgs/servers/geospatial/martin/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   checkFlags = [
     "--skip function_source_schemas"
diff --git a/pkgs/servers/gotosocial/default.nix b/pkgs/servers/gotosocial/default.nix
index 3f57180795ee..c313b5f8d5cb 100644
--- a/pkgs/servers/gotosocial/default.nix
+++ b/pkgs/servers/gotosocial/default.nix
@@ -40,7 +40,7 @@ buildGoModule rec {
   '';
 
   # tests are working only on x86_64-linux
-  # doCheck = stdenv.isLinux && stdenv.isx86_64;
+  # doCheck = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86_64;
   # checks are currently very unstable in our setup, so we should test manually for now
   doCheck = false;
 
diff --git a/pkgs/servers/gpsd/default.nix b/pkgs/servers/gpsd/default.nix
index ab1668ccfb92..4b9269ab6692 100644
--- a/pkgs/servers/gpsd/default.nix
+++ b/pkgs/servers/gpsd/default.nix
@@ -11,7 +11,7 @@
 , dbus
 , libusb1
 , ncurses
-, kppsSupport ? stdenv.isLinux, pps-tools
+, kppsSupport ? stdenv.hostPlatform.isLinux, pps-tools
 , python3Packages
 
 # optional deps for GUI packages
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index a664cf0fa9d7..4a4a6b8eed80 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -537,7 +537,7 @@ in python.pkgs.buildPythonApplication rec {
   makeWrapperArgs = lib.optional skipPip "--add-flags --skip-pip";
 
   # upstream only tests on Linux, so do we.
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   nativeCheckInputs = with python.pkgs; [
     # test infrastructure (selectively from requirement_test.txt)
diff --git a/pkgs/servers/home-automation/evcc/default.nix b/pkgs/servers/home-automation/evcc/default.nix
index d7377a5d3e6f..5f93c5586719 100644
--- a/pkgs/servers/home-automation/evcc/default.nix
+++ b/pkgs/servers/home-automation/evcc/default.nix
@@ -67,7 +67,7 @@ buildGo123Module rec {
     make ui
   '';
 
-  doCheck = !stdenv.isDarwin; # darwin sandbox limitations around network access, access to /etc/protocols and likely more
+  doCheck = !stdenv.hostPlatform.isDarwin; # darwin sandbox limitations around network access, access to /etc/protocols and likely more
 
   checkFlags = let
     skippedTests = [
diff --git a/pkgs/servers/homepage-dashboard/default.nix b/pkgs/servers/homepage-dashboard/default.nix
index 0b957e6337b9..dde6162438cb 100644
--- a/pkgs/servers/homepage-dashboard/default.nix
+++ b/pkgs/servers/homepage-dashboard/default.nix
@@ -50,9 +50,9 @@ buildNpmPackage rec {
     patchShebangs .next/standalone/server.js
   '';
 
-  nativeBuildInputs = [ git ] ++ lib.optionals stdenv.isDarwin [ cctools ];
+  nativeBuildInputs = [ git ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ cctools ];
 
-  buildInputs = [ nodePackages.node-gyp-build ] ++ lib.optionals stdenv.isDarwin [ IOKit ];
+  buildInputs = [ nodePackages.node-gyp-build ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   env.PYTHON = "${python3}/bin/python";
 
@@ -107,6 +107,6 @@ buildNpmPackage rec {
     license = lib.licenses.gpl3;
     maintainers = with lib.maintainers; [ jnsgruk ];
     platforms = lib.platforms.all;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/servers/http/apache-httpd/2.4.nix b/pkgs/servers/http/apache-httpd/2.4.nix
index c0ebb2e8bfcc..2d9ac45b8e82 100644
--- a/pkgs/servers/http/apache-httpd/2.4.nix
+++ b/pkgs/servers/http/apache-httpd/2.4.nix
@@ -41,11 +41,11 @@ stdenv.mkDerivation rec {
     lib.optional brotliSupport brotli ++
     lib.optional sslSupport openssl ++
     lib.optional modTlsSupport rustls-ffi ++
-    lib.optional (modTlsSupport && stdenv.isDarwin) Foundation ++
+    lib.optional (modTlsSupport && stdenv.hostPlatform.isDarwin) Foundation ++
     lib.optional ldapSupport openldap ++    # there is no --with-ldap flag
     lib.optional libxml2Support libxml2 ++
     lib.optional http2Support nghttp2 ++
-    lib.optional stdenv.isDarwin libiconv;
+    lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   postPatch = ''
     sed -i config.layout -e "s|installbuilddir:.*|installbuilddir: $dev/share/build|"
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   '';
 
   # Required for ‘pthread_cancel’.
-  NIX_LDFLAGS = lib.optionalString (!stdenv.isDarwin) "-lgcc_s";
+  NIX_LDFLAGS = lib.optionalString (!stdenv.hostPlatform.isDarwin) "-lgcc_s";
 
   configureFlags = [
     "--with-apr=${apr.dev}"
diff --git a/pkgs/servers/http/apache-modules/mod_python/default.nix b/pkgs/servers/http/apache-modules/mod_python/default.nix
index ddd33184e046..bebd1278acc2 100644
--- a/pkgs/servers/http/apache-modules/mod_python/default.nix
+++ b/pkgs/servers/http/apache-modules/mod_python/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     apacheHttpd
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libintl
   ];
 
diff --git a/pkgs/servers/http/couchdb/3.nix b/pkgs/servers/http/couchdb/3.nix
index 87e80976b8c5..092c13f070a1 100644
--- a/pkgs/servers/http/couchdb/3.nix
+++ b/pkgs/servers/http/couchdb/3.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     substituteInPlace src/couch/rebar.config.script --replace '/usr/include/mozjs-91' "${spidermonkey_91.dev}/include/mozjs-91"
     substituteInPlace configure --replace '/usr/include/''${SM_HEADERS}' "${spidermonkey_91.dev}/include/mozjs-91"
     patchShebangs bin/rebar
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # LTO with Clang produces LLVM bitcode, which causes linking to fail quietly.
     # (There are warnings, but no hard errors, and it produces an empty dylib.)
     substituteInPlace src/jiffy/rebar.config.script --replace '"-flto"' '""'
diff --git a/pkgs/servers/http/dufs/default.nix b/pkgs/servers/http/dufs/default.nix
index be7ed60083ed..b7dfb2d3b643 100644
--- a/pkgs/servers/http/dufs/default.nix
+++ b/pkgs/servers/http/dufs/default.nix
@@ -21,13 +21,13 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
   # FIXME: checkPhase on darwin will leave some zombie spawn processes
   # see https://github.com/NixOS/nixpkgs/issues/205620
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   checkFlags = [
     # tests depend on network interface, may fail with virtual IPs.
     "--skip=validate_printed_urls"
diff --git a/pkgs/servers/http/merecat/default.nix b/pkgs/servers/http/merecat/default.nix
index 6231fb9e2ad2..344f81da2ff7 100644
--- a/pkgs/servers/http/merecat/default.nix
+++ b/pkgs/servers/http/merecat/default.nix
@@ -47,6 +47,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ fgaz ];
     platforms = platforms.all;
     # Strange header and/or linker errors
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/servers/http/nginx/generic.nix b/pkgs/servers/http/nginx/generic.nix
index 9369259ff65e..266c09755ab0 100644
--- a/pkgs/servers/http/nginx/generic.nix
+++ b/pkgs/servers/http/nginx/generic.nix
@@ -129,7 +129,7 @@ stdenv.mkDerivation {
   ] ++ lib.optionals (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "11") [
     # fix build vts module on gcc11
     "-Wno-error=stringop-overread"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=deprecated-declarations"
     "-Wno-error=gnu-folding-constant"
     "-Wno-error=unused-but-set-variable"
@@ -173,7 +173,7 @@ stdenv.mkDerivation {
 
   inherit postPatch;
 
-  hardeningEnable = lib.optional (!stdenv.isDarwin) "pie";
+  hardeningEnable = lib.optional (!stdenv.hostPlatform.isDarwin) "pie";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/servers/http/tengine/default.nix b/pkgs/servers/http/tengine/default.nix
index 6f7ff9ceb765..bddb334e8c5d 100644
--- a/pkgs/servers/http/tengine/default.nix
+++ b/pkgs/servers/http/tengine/default.nix
@@ -100,11 +100,11 @@ stdenv.mkDerivation rec {
     ++ map (mod: "--add-module=${mod.src}") modules;
 
   env.NIX_CFLAGS_COMPILE = "-I${libxml2.dev}/include/libxml2 -Wno-error=implicit-fallthrough"
-    + optionalString stdenv.isDarwin " -Wno-error=deprecated-declarations";
+    + optionalString stdenv.hostPlatform.isDarwin " -Wno-error=deprecated-declarations";
 
   preConfigure = (lib.concatMapStringsSep "\n" (mod: mod.preConfigure or "") modules);
 
-  hardeningEnable = optional (!stdenv.isDarwin) "pie";
+  hardeningEnable = optional (!stdenv.hostPlatform.isDarwin) "pie";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/servers/http/trafficserver/default.nix b/pkgs/servers/http/trafficserver/default.nix
index 59b199bd9a2a..e0b20f68bf06 100644
--- a/pkgs/servers/http/trafficserver/default.nix
+++ b/pkgs/servers/http/trafficserver/default.nix
@@ -18,9 +18,9 @@
 , curl
 , withCurses ? true
 , ncurses
-, withCap ? stdenv.isLinux
+, withCap ? stdenv.hostPlatform.isLinux
 , libcap
-, withUnwind ? stdenv.isLinux
+, withUnwind ? stdenv.hostPlatform.isLinux
 , libunwind
 # optional dependencies
 , withBrotli ? false
@@ -64,7 +64,7 @@ stdenv.mkDerivation rec {
   # [2]: https://github.com/apache/trafficserver/blob/3fd2c60/configure.ac#L742-L788
   nativeBuildInputs = [ makeWrapper pkg-config file python3 ]
     ++ (with perlPackages; [ perl ExtUtilsMakeMaker ])
-    ++ lib.optionals stdenv.isLinux [ linuxHeaders ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ linuxHeaders ];
 
   buildInputs = [
     openssl
@@ -95,10 +95,10 @@ stdenv.mkDerivation rec {
       tools/check-unused-dependencies
 
     substituteInPlace configure --replace '/usr/bin/file' '${file}/bin/file'
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace configure \
       --replace '/usr/include/linux' '${linuxHeaders}/include/linux'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # 'xcrun leaks' probably requires non-free XCode
     substituteInPlace iocore/net/test_certlookup.cc \
       --replace 'xcrun leaks' 'true'
diff --git a/pkgs/servers/imgproxy/default.nix b/pkgs/servers/imgproxy/default.nix
index 5388376720c9..52a871092270 100644
--- a/pkgs/servers/imgproxy/default.nix
+++ b/pkgs/servers/imgproxy/default.nix
@@ -17,7 +17,7 @@ buildGoModule rec {
   nativeBuildInputs = [ pkg-config gobject-introspection ];
 
   buildInputs = [ vips ]
-    ++ lib.optionals stdenv.isDarwin [ libunwind ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libunwind ];
 
   preBuild = ''
     export CGO_LDFLAGS_ALLOW='-(s|w)'
diff --git a/pkgs/servers/irc/solanum/default.nix b/pkgs/servers/irc/solanum/default.nix
index e70d6cc0a8e6..b31a7e16cd1f 100644
--- a/pkgs/servers/irc/solanum/default.nix
+++ b/pkgs/servers/irc/solanum/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     "--localstatedir=/var/lib"
     "--with-rundir=/run"
     "--with-logdir=/var/log"
-  ] ++ lib.optionals (stdenv.isLinux) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [
     "--enable-sctp=${lksctp-tools.out}/lib"
   ];
 
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     sqlite
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   enableParallelBuilding = true;
   # Missing install depends:
diff --git a/pkgs/servers/jackett/default.nix b/pkgs/servers/jackett/default.nix
index 64ce9873f45f..b0d5ffaa17cf 100644
--- a/pkgs/servers/jackett/default.nix
+++ b/pkgs/servers/jackett/default.nix
@@ -28,7 +28,7 @@ buildDotnetModule rec {
 
   runtimeDeps = [ openssl ];
 
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64); # mono is not available on aarch64-darwin
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64); # mono is not available on aarch64-darwin
   nativeCheckInputs = [ mono ];
   testProjectFile = "src/Jackett.Test/Jackett.Test.csproj";
 
diff --git a/pkgs/servers/krill/default.nix b/pkgs/servers/krill/default.nix
index a8847215d65c..f310b4d020ef 100644
--- a/pkgs/servers/krill/default.nix
+++ b/pkgs/servers/krill/default.nix
@@ -20,14 +20,14 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Z12fUK4TUgk38/vNAt8RWLFGLc8WnZAgHWz0xl1QKLI=";
 
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
   nativeBuildInputs = [ pkg-config ];
 
   # Needed to get openssl-sys to use pkgconfig.
   OPENSSL_NO_VENDOR = 1;
 
   # disable failing tests on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "RPKI Certificate Authority and Publication Server written in Rust";
diff --git a/pkgs/servers/lidarr/default.nix b/pkgs/servers/lidarr/default.nix
index 279a099c9c3c..6c5e88633e96 100644
--- a/pkgs/servers/lidarr/default.nix
+++ b/pkgs/servers/lidarr/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, mono, libmediainfo, sqlite, curl, chromaprint, makeWrapper, icu, dotnet-runtime, openssl, nixosTests, zlib }:
 
 let
-  os = if stdenv.isDarwin then "osx" else "linux";
+  os = if stdenv.hostPlatform.isDarwin then "osx" else "linux";
   arch = {
     x86_64-linux = "x64";
     aarch64-linux = "arm64";
diff --git a/pkgs/servers/mail/dovecot/default.nix b/pkgs/servers/mail/dovecot/default.nix
index e7be597d7e4f..7a2c42fad1f9 100644
--- a/pkgs/servers/mail/dovecot/default.nix
+++ b/pkgs/servers/mail/dovecot/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ perl pkg-config ];
   buildInputs =
     [ openssl bzip2 zlib lz4 clucene_core_2 icu openldap libsodium libstemmer cyrus_sasl.dev ]
-    ++ lib.optionals (stdenv.isLinux) [ systemd pam libcap inotify-tools ]
+    ++ lib.optionals (stdenv.hostPlatform.isLinux) [ systemd pam libcap inotify-tools ]
     ++ lib.optional withMySQL libmysqlclient
     ++ lib.optional withPgSQL postgresql
     ++ lib.optional withSQLite sqlite
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
     # DES-encrypted passwords are not supported by NixPkgs anymore
     sed '/test_password_scheme("CRYPT"/d' -i src/auth/test-libpassword.c
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     export systemdsystemunitdir=$out/etc/systemd/system
   '';
 
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
       url = "https://salsa.debian.org/debian/dovecot/-/raw/debian/1%252.3.19.1+dfsg1-2/debian/patches/Support-openssl-3.0.patch";
       hash = "sha256-PbBB1jIY3jIC8Js1NY93zkV0gISGUq7Nc67Ul5tN7sw=";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # fix timespec calls
     ./timespec.patch
   ];
@@ -86,9 +86,9 @@ stdenv.mkDerivation rec {
     "--with-lucene"
     "--with-icu"
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "i_cv_epoll_works=${if stdenv.isLinux then "yes" else "no"}"
-    "i_cv_posix_fallocate_works=${if stdenv.isDarwin then "no" else "yes"}"
-    "i_cv_inotify_works=${if stdenv.isLinux then "yes" else "no"}"
+    "i_cv_epoll_works=${if stdenv.hostPlatform.isLinux then "yes" else "no"}"
+    "i_cv_posix_fallocate_works=${if stdenv.hostPlatform.isDarwin then "no" else "yes"}"
+    "i_cv_inotify_works=${if stdenv.hostPlatform.isLinux then "yes" else "no"}"
     "i_cv_signed_size_t=no"
     "i_cv_signed_time_t=yes"
     "i_cv_c99_vsnprintf=yes"
@@ -100,14 +100,14 @@ stdenv.mkDerivation rec {
     "lib_cv_va_copy=yes"
     "lib_cv___va_copy=yes"
     "lib_cv_va_val_copy=yes"
-  ] ++ lib.optional stdenv.isLinux "--with-systemd"
-    ++ lib.optional stdenv.isDarwin "--enable-static"
+  ] ++ lib.optional stdenv.hostPlatform.isLinux "--with-systemd"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--enable-static"
     ++ lib.optional withMySQL "--with-mysql"
     ++ lib.optional withPgSQL "--with-pgsql"
     ++ lib.optional withSQLite "--with-sqlite"
     ++ lib.optional withLua "--with-lua";
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://dovecot.org/";
diff --git a/pkgs/servers/mail/dovecot/plugins/fts_xapian/default.nix b/pkgs/servers/mail/dovecot/plugins/fts_xapian/default.nix
index 283e47965110..78bb5b1e1cc4 100644
--- a/pkgs/servers/mail/dovecot/plugins/fts_xapian/default.nix
+++ b/pkgs/servers/mail/dovecot/plugins/fts_xapian/default.nix
@@ -31,6 +31,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl21Only;
     maintainers = with maintainers; [ julm symphorien ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/dovecot_fts_xapian.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/dovecot_fts_xapian.x86_64-darwin
   };
 }
diff --git a/pkgs/servers/mail/mailpit/default.nix b/pkgs/servers/mail/mailpit/default.nix
index fd8f01674d80..c29baacd447c 100644
--- a/pkgs/servers/mail/mailpit/default.nix
+++ b/pkgs/servers/mail/mailpit/default.nix
@@ -39,7 +39,7 @@ let
       hash = source.npmDepsHash;
     };
 
-    env = lib.optionalAttrs (stdenv.isDarwin && stdenv.isx86_64) {
+    env = lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) {
       # Make sure libc++ uses `posix_memalign` instead of `aligned_alloc` on x86_64-darwin.
       # Otherwise, nodejs would require the 11.0 SDK and macOS 10.15+.
       NIX_CFLAGS_COMPILE = "-D__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__=101300";
diff --git a/pkgs/servers/mail/public-inbox/default.nix b/pkgs/servers/mail/public-inbox/default.nix
index 05dc98b466d4..72caae6a5b05 100644
--- a/pkgs/servers/mail/public-inbox/default.nix
+++ b/pkgs/servers/mail/public-inbox/default.nix
@@ -126,7 +126,7 @@ buildPerlPackage rec {
     man
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [
     curl
     git
@@ -138,7 +138,7 @@ buildPerlPackage rec {
     PlackTestExternalServer
     TestSimple13
     XMLTreePP
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     LinuxInotify2
   ];
   preCheck = ''
diff --git a/pkgs/servers/mail/rspamd/default.nix b/pkgs/servers/mail/rspamd/default.nix
index aff57ef0e137..65fec7bad3f5 100644
--- a/pkgs/servers/mail/rspamd/default.nix
+++ b/pkgs/servers/mail/rspamd/default.nix
@@ -24,12 +24,12 @@
   zstd,
   libarchive,
   withBlas ? true,
-  withHyperscan ? stdenv.isx86_64,
-  withLuaJIT ? stdenv.isx86_64,
+  withHyperscan ? stdenv.hostPlatform.isx86_64,
+  withLuaJIT ? stdenv.hostPlatform.isx86_64,
   nixosTests,
 }:
 
-assert withHyperscan -> stdenv.isx86_64;
+assert withHyperscan -> stdenv.hostPlatform.isx86_64;
 
 stdenv.mkDerivation rec {
   pname = "rspamd";
diff --git a/pkgs/servers/matrix-conduit/default.nix b/pkgs/servers/matrix-conduit/default.nix
index 91cdded5a2fe..4e3ddb37db4d 100644
--- a/pkgs/servers/matrix-conduit/default.nix
+++ b/pkgs/servers/matrix-conduit/default.nix
@@ -44,7 +44,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     sqlite
     rust-jemalloc-sys
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
@@ -55,7 +55,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   # tests failed on x86_64-darwin with SIGILL: illegal instruction
-  doCheck = !(stdenv.isx86_64 && stdenv.isDarwin);
+  doCheck = !(stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin);
 
   passthru.tests = {
     inherit (nixosTests) matrix-conduit;
diff --git a/pkgs/servers/matrix-hebbot/default.nix b/pkgs/servers/matrix-hebbot/default.nix
index ca90304ed32f..a2f222e6d489 100644
--- a/pkgs/servers/matrix-hebbot/default.nix
+++ b/pkgs/servers/matrix-hebbot/default.nix
@@ -29,9 +29,9 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ pkg-config cmake ] ++
-    lib.optionals stdenv.isDarwin [ autoconf automake ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ autoconf automake ];
 
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Matrix bot which can generate \"This Week in X\" like blog posts ";
diff --git a/pkgs/servers/matrix-synapse/default.nix b/pkgs/servers/matrix-synapse/default.nix
index 1ce8a8a2f9dc..0e80af5a21ef 100644
--- a/pkgs/servers/matrix-synapse/default.nix
+++ b/pkgs/servers/matrix-synapse/default.nix
@@ -58,7 +58,7 @@ python3.pkgs.buildPythonApplication rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
@@ -140,7 +140,7 @@ python3.pkgs.buildPythonApplication rec {
   ])
   ++ lib.flatten (lib.attrValues passthru.optional-dependencies);
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/servers/matrix-synapse/plugins/mjolnir-antispam.nix b/pkgs/servers/matrix-synapse/plugins/mjolnir-antispam.nix
index e728e1cb013a..364abdb95196 100644
--- a/pkgs/servers/matrix-synapse/plugins/mjolnir-antispam.nix
+++ b/pkgs/servers/matrix-synapse/plugins/mjolnir-antispam.nix
@@ -28,6 +28,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/matrix-org/mjolnir/blob/main/docs/synapse_module.md";
     license = licenses.asl20;
     maintainers = with maintainers; [ jojosch ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/servers/matrix-synapse/tools/rust-synapse-compress-state/default.nix b/pkgs/servers/matrix-synapse/tools/rust-synapse-compress-state/default.nix
index a66a1bdb89fe..de1cc21cf47d 100644
--- a/pkgs/servers/matrix-synapse/tools/rust-synapse-compress-state/default.nix
+++ b/pkgs/servers/matrix-synapse/tools/rust-synapse-compress-state/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [ openssl ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Tool to compress some state in a Synapse instance's database";
     homepage = "https://github.com/matrix-org/rust-synapse-compress-state";
     license = licenses.asl20;
diff --git a/pkgs/servers/memcached/default.nix b/pkgs/servers/memcached/default.nix
index ccc9fff51ace..71e77f4940ad 100644
--- a/pkgs/servers/memcached/default.nix
+++ b/pkgs/servers/memcached/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   hardeningEnable = [ "pie" ];
 
   env.NIX_CFLAGS_COMPILE = toString ([ "-Wno-error=deprecated-declarations" ]
-    ++ lib.optional stdenv.isDarwin "-Wno-error");
+    ++ lib.optional stdenv.hostPlatform.isDarwin "-Wno-error");
 
   meta = with lib; {
     description = "Distributed memory object caching system";
diff --git a/pkgs/servers/meteor/default.nix b/pkgs/servers/meteor/default.nix
index 2036d31e5b20..1454f4994c15 100644
--- a/pkgs/servers/meteor/default.nix
+++ b/pkgs/servers/meteor/default.nix
@@ -58,7 +58,7 @@ stdenv.mkDerivation {
     chmod +x $out/bin/meteor
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     # Patch Meteor to dynamically fixup shebangs and ELF metadata where
     # necessary.
     pushd $out
diff --git a/pkgs/servers/microbin/default.nix b/pkgs/servers/microbin/default.nix
index 55ebc572b686..62cb97ce1b2f 100644
--- a/pkgs/servers/microbin/default.nix
+++ b/pkgs/servers/microbin/default.nix
@@ -67,7 +67,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     oniguruma
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/servers/microserver/default.nix b/pkgs/servers/microserver/default.nix
index acc223627fce..810128a5d6ea 100644
--- a/pkgs/servers/microserver/default.nix
+++ b/pkgs/servers/microserver/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-JGsMtlWuww1rYE4w6i2VlyD6gGHqnLehLDZmW57R+Fo=";
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security ]);
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security ]);
 
   meta = with lib; {
     homepage = "https://github.com/robertohuertasm/microserver";
diff --git a/pkgs/servers/misc/qremotecontrol-server/default.nix b/pkgs/servers/misc/qremotecontrol-server/default.nix
index 5fba2c0a382f..104a2b876c9b 100644
--- a/pkgs/servers/misc/qremotecontrol-server/default.nix
+++ b/pkgs/servers/misc/qremotecontrol-server/default.nix
@@ -56,6 +56,6 @@ stdenv.mkDerivation {
       powering on the computer via Wake On Lan is supported.
     '';
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/servers/monitoring/bosun/default.nix b/pkgs/servers/monitoring/bosun/default.nix
index d001d245d4c0..3158f9b2424b 100644
--- a/pkgs/servers/monitoring/bosun/default.nix
+++ b/pkgs/servers/monitoring/bosun/default.nix
@@ -22,6 +22,6 @@ buildGoModule {
     license = licenses.mit;
     homepage = "https://bosun.org";
     maintainers = with maintainers; [ offline ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/servers/monitoring/grafana-agent/default.nix b/pkgs/servers/monitoring/grafana-agent/default.nix
index fd1307c10f61..c45ea47bac92 100644
--- a/pkgs/servers/monitoring/grafana-agent/default.nix
+++ b/pkgs/servers/monitoring/grafana-agent/default.nix
@@ -79,12 +79,12 @@ buildGoModule rec {
 
   # uses go-systemd, which uses libsystemd headers
   # https://github.com/coreos/go-systemd/issues/351
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isLinux [ "-I${lib.getDev systemd}/include" ]);
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isLinux [ "-I${lib.getDev systemd}/include" ]);
 
   # go-systemd uses libsystemd under the hood, which does dlopen(libsystemd) at
   # runtime.
   # Add to RUNPATH so it can be found.
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf \
       --set-rpath "${lib.makeLibraryPath [ (lib.getLib systemd) ]}:$(patchelf --print-rpath $out/bin/grafana-agent)" \
       $out/bin/grafana-agent
diff --git a/pkgs/servers/monitoring/grafana/default.nix b/pkgs/servers/monitoring/grafana/default.nix
index 4eca91169012..cb5f14fa28c4 100644
--- a/pkgs/servers/monitoring/grafana/default.nix
+++ b/pkgs/servers/monitoring/grafana/default.nix
@@ -22,7 +22,7 @@ buildGoModule rec {
   # borrowed from: https://github.com/NixOS/nixpkgs/blob/d70d9425f49f9aba3c49e2c389fe6d42bac8c5b0/pkgs/development/tools/analysis/snyk/default.nix#L20-L22
   env = {
     CYPRESS_INSTALL_BINARY = 0;
-  } // lib.optionalAttrs (stdenv.isDarwin && stdenv.isx86_64) {
+  } // lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) {
     # Fix error: no member named 'aligned_alloc' in the global namespace.
     # Occurs while building @esfx/equatable@npm:1.0.2 on x86_64-darwin
     NIX_CFLAGS_COMPILE = "-D_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION=1";
@@ -35,7 +35,7 @@ buildGoModule rec {
       yarn nodejs cacert
       jq moreutils python3
     # @esfx/equatable@npm:1.0.2 fails to build on darwin as it requires `xcbuild`
-    ] ++ lib.optionals stdenv.isDarwin [ xcbuild.xcbuild ];
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild.xcbuild ];
     buildPhase = ''
       runHook preBuild
       export HOME="$(mktemp -d)"
@@ -65,7 +65,7 @@ buildGoModule rec {
   proxyVendor = true;
 
   nativeBuildInputs = [ wire yarn jq moreutils removeReferencesTo python3 faketty ]
-    ++ lib.optionals stdenv.isDarwin [ xcbuild.xcbuild ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ xcbuild.xcbuild ];
 
   postConfigure = ''
     # Generate DI code that's required to compile the package.
diff --git a/pkgs/servers/monitoring/kapacitor/default.nix b/pkgs/servers/monitoring/kapacitor/default.nix
index 20525bfbf965..76048222edb7 100644
--- a/pkgs/servers/monitoring/kapacitor/default.nix
+++ b/pkgs/servers/monitoring/kapacitor/default.nix
@@ -42,7 +42,7 @@ let
     sourceRoot = "${src.name}/libflux";
     cargoHash = "sha256-oAMoGGdR0QEjSzZ0/J5J9s/ekSlryCcRBSo5N2r70Ko=";
     nativeBuildInputs = [ rustPlatform.bindgenHook ];
-    buildInputs = lib.optional stdenv.isDarwin libiconv;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
     pkgcfg = ''
       Name: flux
       Version: ${libflux_version}
@@ -56,7 +56,7 @@ let
       cp -r $NIX_BUILD_TOP/source/libflux/include/influxdata $out/include
       substitute $pkgcfgPath $out/pkgconfig/flux.pc \
         --replace /out $out
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -id $out/lib/libflux.dylib $out/lib/libflux.dylib
     '';
   };
diff --git a/pkgs/servers/monitoring/lcdproc/default.nix b/pkgs/servers/monitoring/lcdproc/default.nix
index d70ba0ea1991..7570428d7f3e 100644
--- a/pkgs/servers/monitoring/lcdproc/default.nix
+++ b/pkgs/servers/monitoring/lcdproc/default.nix
@@ -75,6 +75,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ peterhoeg ];
     platforms = platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/servers/monitoring/loki/default.nix b/pkgs/servers/monitoring/loki/default.nix
index aa70eda0de81..987ec3f5419b 100644
--- a/pkgs/servers/monitoring/loki/default.nix
+++ b/pkgs/servers/monitoring/loki/default.nix
@@ -34,9 +34,9 @@ buildGoModule rec {
   tags = ["promtail_journal_enabled"];
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optionals stdenv.isLinux [ systemd.dev ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ systemd.dev ];
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/promtail \
       --prefix LD_LIBRARY_PATH : "${lib.getLib systemd}/lib"
   '';
diff --git a/pkgs/servers/monitoring/mackerel-agent/default.nix b/pkgs/servers/monitoring/mackerel-agent/default.nix
index 9507b5d1dcf4..69538107ad4f 100644
--- a/pkgs/servers/monitoring/mackerel-agent/default.nix
+++ b/pkgs/servers/monitoring/mackerel-agent/default.nix
@@ -12,8 +12,8 @@ buildGoModule rec {
   };
 
   nativeBuildInputs = [ makeWrapper ];
-  nativeCheckInputs = lib.optionals (!stdenv.isDarwin) [ nettools ];
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ iproute2 ];
+  nativeCheckInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ nettools ];
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ iproute2 ];
 
   vendorHash = "sha256-JIqQXS2iw3opeotpfqC16w7hdu+7XjxhIyVj2M+98ec=";
 
diff --git a/pkgs/servers/monitoring/mtail/default.nix b/pkgs/servers/monitoring/mtail/default.nix
index e64ac1375414..4c05a7513eca 100644
--- a/pkgs/servers/monitoring/mtail/default.nix
+++ b/pkgs/servers/monitoring/mtail/default.nix
@@ -24,7 +24,7 @@ buildGoModule rec {
   ];
 
   # fails on darwin with: write unixgram -> <tmpdir>/rsyncd.log: write: message too long
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Tool for extracting metrics from application logs";
diff --git a/pkgs/servers/monitoring/nagios/plugins/check_ssl_cert.nix b/pkgs/servers/monitoring/nagios/plugins/check_ssl_cert.nix
index f0bcd2bde80a..e6e4f6f3559b 100644
--- a/pkgs/servers/monitoring/nagios/plugins/check_ssl_cert.nix
+++ b/pkgs/servers/monitoring/nagios/plugins/check_ssl_cert.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     wrapProgram $out/bin/check_ssl_cert \
-      --prefix PATH : "${lib.makeBinPath ([ openssl file which curl bc coreutils bind nmap netcat-gnu python3 ] ++ lib.optional stdenv.isLinux iproute2) }"
+      --prefix PATH : "${lib.makeBinPath ([ openssl file which curl bc coreutils bind nmap netcat-gnu python3 ] ++ lib.optional stdenv.hostPlatform.isLinux iproute2) }"
   '';
 
   meta = with lib; {
diff --git a/pkgs/servers/monitoring/net-snmp/default.nix b/pkgs/servers/monitoring/net-snmp/default.nix
index b7db5e56fd77..5aa0e8697c58 100644
--- a/pkgs/servers/monitoring/net-snmp/default.nix
+++ b/pkgs/servers/monitoring/net-snmp/default.nix
@@ -45,7 +45,7 @@ in stdenv.mkDerivation rec {
       "--with-openssl=${openssl.dev}"
       "--disable-embedded-perl"
       "--without-perl-modules"
-    ] ++ lib.optional stdenv.isLinux "--with-mnttab=/proc/mounts";
+    ] ++ lib.optional stdenv.hostPlatform.isLinux "--with-mnttab=/proc/mounts";
 
   postPatch = ''
     substituteInPlace testing/fulltests/support/simple_TESTCONF.sh --replace "/bin/netstat" "${nettools}/bin/netstat"
@@ -61,7 +61,7 @@ in stdenv.mkDerivation rec {
   nativeBuildInputs = [ nettools file autoreconfHook ];
   buildInputs = [ openssl ]
     ++ lib.optional withPerlTools perlWithPkgs
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.ApplicationServices
       darwin.apple_sdk.frameworks.CoreServices
       darwin.apple_sdk.frameworks.IOKit
diff --git a/pkgs/servers/monitoring/openobserve/default.nix b/pkgs/servers/monitoring/openobserve/default.nix
index 5ff8616225c6..0948f72fcb09 100644
--- a/pkgs/servers/monitoring/openobserve/default.nix
+++ b/pkgs/servers/monitoring/openobserve/default.nix
@@ -82,7 +82,7 @@ rustPlatform.buildRustPackage {
     xz
     zlib
     zstd
-  ] ++ lib.optionals stdenv.isDarwin (with apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with apple_sdk.frameworks; [
     CoreFoundation
     CoreServices
     IOKit
diff --git a/pkgs/servers/monitoring/prometheus/default.nix b/pkgs/servers/monitoring/prometheus/default.nix
index 5e33eefa9544..6d3e32640fe1 100644
--- a/pkgs/servers/monitoring/prometheus/default.nix
+++ b/pkgs/servers/monitoring/prometheus/default.nix
@@ -121,7 +121,7 @@ buildGoModule rec {
 
   # https://hydra.nixos.org/build/130673870/nixlog/1
   # Test mock data uses 64 bit data without an explicit (u)int64
-  doCheck = !(stdenv.isDarwin || stdenv.hostPlatform.parsed.cpu.bits < 64);
+  doCheck = !(stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.parsed.cpu.bits < 64);
 
   passthru.tests = { inherit (nixosTests) prometheus; };
 
diff --git a/pkgs/servers/monitoring/prometheus/exportarr/default.nix b/pkgs/servers/monitoring/prometheus/exportarr/default.nix
index caef8c57605d..d23cc62c80ff 100644
--- a/pkgs/servers/monitoring/prometheus/exportarr/default.nix
+++ b/pkgs/servers/monitoring/prometheus/exportarr/default.nix
@@ -23,7 +23,7 @@ buildGoModule rec {
 
   ldflags = [ "-s" "-w" ];
 
-  tags = lib.optionals stdenv.isLinux [ "netgo" ];
+  tags = lib.optionals stdenv.hostPlatform.isLinux [ "netgo" ];
 
   preCheck = ''
     # Run all tests.
diff --git a/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix b/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix
index 50fe085d4a0d..51a13f1efcd0 100644
--- a/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/wireguard-exporter.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     rm .cargo/config.toml
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   passthru.tests = { inherit (nixosTests.prometheus-exporters) wireguard; };
 
diff --git a/pkgs/servers/monitoring/uptime-kuma/default.nix b/pkgs/servers/monitoring/uptime-kuma/default.nix
index f787588aa90e..e53e641e5d88 100644
--- a/pkgs/servers/monitoring/uptime-kuma/default.nix
+++ b/pkgs/servers/monitoring/uptime-kuma/default.nix
@@ -46,6 +46,6 @@ buildNpmPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [ julienmalka ];
     # FileNotFoundError: [Errno 2] No such file or directory: 'xcrun'
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/servers/mpd/default.nix b/pkgs/servers/mpd/default.nix
index 57178da7297f..ee70b1b1e0c4 100644
--- a/pkgs/servers/mpd/default.nix
+++ b/pkgs/servers/mpd/default.nix
@@ -97,8 +97,8 @@ let
       # Disable platform specific features if needed
       # using libmad to decode mp3 files on darwin is causing a segfault -- there
       # is probably a solution, but I'm disabling it for now
-      platformMask = lib.optionals stdenv.isDarwin [ "mad" "pulse" "jack" "smbclient" ]
-                  ++ lib.optionals (!stdenv.isLinux) [ "alsa" "pipewire" "io_uring" "systemd" "syslog" ];
+      platformMask = lib.optionals stdenv.hostPlatform.isDarwin [ "mad" "pulse" "jack" "smbclient" ]
+                  ++ lib.optionals (!stdenv.hostPlatform.isLinux) [ "alsa" "pipewire" "io_uring" "systemd" "syslog" ];
 
       knownFeatures = builtins.attrNames featureDependencies ++ builtins.attrNames nativeFeatureDependencies;
       platformFeatures = lib.subtractLists platformMask knownFeatures;
@@ -137,7 +137,7 @@ let
         gtest
       ]
         ++ concatAttrVals features_ featureDependencies
-        ++ lib.optionals stdenv.isDarwin [ AudioToolbox AudioUnit ];
+        ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioToolbox AudioUnit ];
 
       nativeBuildInputs = [
         meson
@@ -148,7 +148,7 @@ let
 
       depsBuildBuild = [ buildPackages.stdenv.cc ];
 
-      postPatch = lib.optionalString (stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "12.0") ''
+      postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "12.0") ''
         substituteInPlace src/output/plugins/OSXOutputPlugin.cxx \
           --replace kAudioObjectPropertyElement{Main,Master} \
           --replace kAudioHardwareServiceDeviceProperty_Virtual{Main,Master}Volume
@@ -166,7 +166,7 @@ let
       outputs = [ "out" "doc" ]
         ++ lib.optional (builtins.elem "documentation" features_) "man";
 
-      CXXFLAGS = lib.optionals stdenv.isDarwin [
+      CXXFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [
         "-D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0"
       ];
 
@@ -210,9 +210,9 @@ in
     "libmpdclient" "id3tag" "expat" "pcre"
     "yajl" "sqlite"
     "soundcloud" "qobuz"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "alsa" "systemd" "syslog" "io_uring"
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "mad" "jack"
   ]; };
   mpdWithFeatures = run;
diff --git a/pkgs/servers/mqtt/mosquitto/default.nix b/pkgs/servers/mqtt/mosquitto/default.nix
index 7f32957fdbf4..3c3a6199f7b5 100644
--- a/pkgs/servers/mqtt/mosquitto/default.nix
+++ b/pkgs/servers/mqtt/mosquitto/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-Vs0blV2IhnlEAm0WtOartz+0vLesJfp78FNJCivRxHk=";
   };
 
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       name = "revert-cmake-shared-to-module.patch"; # See https://github.com/eclipse/mosquitto/issues/2277
       url = "https://github.com/eclipse/mosquitto/commit/e21eaeca37196439b3e89bb8fd2eb1903ef94845.patch";
diff --git a/pkgs/servers/mx-puppet-discord/default.nix b/pkgs/servers/mx-puppet-discord/default.nix
index 27fde8301a22..254434a8ba3d 100644
--- a/pkgs/servers/mx-puppet-discord/default.nix
+++ b/pkgs/servers/mx-puppet-discord/default.nix
@@ -47,7 +47,7 @@ in myNodePackages.package.override {
     maintainers = with maintainers; [ expipiplus1 ];
     platforms = platforms.unix;
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     mainProgram = "mx-puppet-discord";
   };
 }
diff --git a/pkgs/servers/mx-puppet-discord/node-composition.nix b/pkgs/servers/mx-puppet-discord/node-composition.nix
index c5d958bef2c4..f47a724999ed 100644
--- a/pkgs/servers/mx-puppet-discord/node-composition.nix
+++ b/pkgs/servers/mx-puppet-discord/node-composition.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../development/node-packages/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/pkgs/servers/networking/rustus/default.nix b/pkgs/servers/networking/rustus/default.nix
index 77bf8ce7d776..3819a23781ef 100644
--- a/pkgs/servers/networking/rustus/default.nix
+++ b/pkgs/servers/networking/rustus/default.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/servers/nosql/eventstore/default.nix b/pkgs/servers/nosql/eventstore/default.nix
index d068f28ccf21..9269993a845e 100644
--- a/pkgs/servers/nosql/eventstore/default.nix
+++ b/pkgs/servers/nosql/eventstore/default.nix
@@ -37,7 +37,7 @@ buildDotnetModule rec {
   executables = [ mainProgram ];
 
   # This test has a problem running on macOS
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "EventStore.Projections.Core.Tests.Services.grpc_service.ServerFeaturesTests<LogFormat+V2,String>.should_receive_expected_endpoints"
     "EventStore.Projections.Core.Tests.Services.grpc_service.ServerFeaturesTests<LogFormat+V3,UInt32>.should_receive_expected_endpoints"
   ];
diff --git a/pkgs/servers/nosql/influxdb/default.nix b/pkgs/servers/nosql/influxdb/default.nix
index 739fab6f8119..384958624611 100644
--- a/pkgs/servers/nosql/influxdb/default.nix
+++ b/pkgs/servers/nosql/influxdb/default.nix
@@ -28,7 +28,7 @@ let
     sourceRoot = "${src.name}/libflux";
     cargoHash = "sha256-O+t4f4P5291BuyARH6Xf3LejMFEQEBv+qKtyjHRhclA=";
     nativeBuildInputs = [ rustPlatform.bindgenHook ];
-    buildInputs = lib.optional stdenv.isDarwin libiconv;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
     pkgcfg = ''
       Name: flux
       Version: ${libflux_version}
@@ -42,7 +42,7 @@ let
       cp -r $NIX_BUILD_TOP/source/libflux/include/influxdata $out/include
       substitute $pkgcfgPath $out/pkgconfig/flux.pc \
         --replace /out $out
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -id $out/lib/libflux.dylib $out/lib/libflux.dylib
     '';
   };
diff --git a/pkgs/servers/nosql/influxdb2/default.nix b/pkgs/servers/nosql/influxdb2/default.nix
index 81333a9f1ec3..99ae9bc38c2b 100644
--- a/pkgs/servers/nosql/influxdb2/default.nix
+++ b/pkgs/servers/nosql/influxdb2/default.nix
@@ -53,7 +53,7 @@ let
     sourceRoot = "${src.name}/libflux";
     cargoHash = "sha256-O+t4f4P5291BuyARH6Xf3LejMFEQEBv+qKtyjHRhclA=";
     nativeBuildInputs = [ rustPlatform.bindgenHook ];
-    buildInputs = lib.optional stdenv.isDarwin libiconv;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
     pkgcfg = ''
       Name: flux
       Version: ${libflux_version}
@@ -67,7 +67,7 @@ let
       cp -r $NIX_BUILD_TOP/source/libflux/include/influxdata $out/include
       substitute $pkgcfgPath $out/pkgconfig/flux.pc \
         --replace /out $out
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -id $out/lib/libflux.dylib $out/lib/libflux.dylib
     '';
   };
diff --git a/pkgs/servers/nosql/mongodb/5.0.nix b/pkgs/servers/nosql/mongodb/5.0.nix
index f69ad97f8ac6..84c0991515b0 100644
--- a/pkgs/servers/nosql/mongodb/5.0.nix
+++ b/pkgs/servers/nosql/mongodb/5.0.nix
@@ -8,13 +8,13 @@ let
   buildMongoDB = callPackage ./mongodb.nix {
     inherit sasl boost Security CoreFoundation cctools;
   };
-  variants = if stdenv.isLinux then
+  variants = if stdenv.hostPlatform.isLinux then
     {
       version = "5.0.29";
       sha256 = "sha256-27+SXo0fjFwJFFm/NhpDhq95dMwiN8RCJO7j5ic49Ls=";
       patches = [ ./fix-build-with-boost-1.79-5_0-linux.patch ];
     }
-  else lib.optionalAttrs stdenv.isDarwin
+  else lib.optionalAttrs stdenv.hostPlatform.isDarwin
     {
       version = "5.0.3"; # at least darwin has to stay on 5.0.3 until the SDK used by nixpkgs is bumped to 10.13
       sha256 = "1p9pq0dfd6lynvnz5p1c8dqp4filzrz86j840xwxwx82dm1zl6p0";
diff --git a/pkgs/servers/nosql/mongodb/mongodb.nix b/pkgs/servers/nosql/mongodb/mongodb.nix
index 9c26f5fa701d..f90695934121 100644
--- a/pkgs/servers/nosql/mongodb/mongodb.nix
+++ b/pkgs/servers/nosql/mongodb/mongodb.nix
@@ -56,7 +56,7 @@ let
     #"stemmer"  -- not nice to package yet (no versioning, no makefile, no shared libs).
     #"valgrind" -- mongodb only requires valgrind.h, which is vendored in the source.
     #"wiredtiger"
-  ] ++ lib.optionals stdenv.isLinux [ "tcmalloc" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ "tcmalloc" ];
   inherit (lib) systems subtractLists;
 
 in stdenv.mkDerivation rec {
@@ -73,7 +73,7 @@ in stdenv.mkDerivation rec {
   nativeBuildInputs = [
     scons
     python
-  ] ++ lib.optional stdenv.isLinux net-snmp;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux net-snmp;
 
   buildInputs = [
     boost
@@ -87,8 +87,8 @@ in stdenv.mkDerivation rec {
     sasl
     snappy
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [ Security CoreFoundation cctools ]
-  ++ lib.optional stdenv.isLinux net-snmp
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security CoreFoundation cctools ]
+  ++ lib.optional stdenv.hostPlatform.isLinux net-snmp
   ++ [ xz ];
 
   # MongoDB keeps track of its build parameters, which tricks nix into
@@ -107,9 +107,9 @@ in stdenv.mkDerivation rec {
     #include <string>'
     substituteInPlace src/mongo/db/exec/plan_stats.h --replace '#include <string>' '#include <optional>
     #include <string>'
-  '' + lib.optionalString (stdenv.isDarwin && lib.versionOlder version "6.0") ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionOlder version "6.0") ''
     substituteInPlace src/third_party/mozjs-${mozjsVersion}/extract/js/src/jsmath.cpp --replace '${mozjsReplace}' 0
-  '' + lib.optionalString stdenv.isi686 ''
+  '' + lib.optionalString stdenv.hostPlatform.isi686 ''
 
     # don't fail by default on i686
     substituteInPlace src/mongo/db/storage/storage_options.h \
@@ -142,9 +142,9 @@ in stdenv.mkDerivation rec {
   preBuild = ''
     sconsFlags+=" CC=$CC"
     sconsFlags+=" CXX=$CXX"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     sconsFlags+=" AR=$AR"
-  '' + lib.optionalString stdenv.isAarch64 ''
+  '' + lib.optionalString stdenv.hostPlatform.isAarch64 ''
     sconsFlags+=" CCFLAGS='-march=armv8-a+crc'"
   '';
 
diff --git a/pkgs/servers/nosql/redis/default.nix b/pkgs/servers/nosql/redis/default.nix
index d15b05699d63..42bafb37c819 100644
--- a/pkgs/servers/nosql/redis/default.nix
+++ b/pkgs/servers/nosql/redis/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optional withSystemd systemd
     ++ lib.optionals tlsSupport [ openssl ];
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/Makefile --replace "-flto" ""
   '';
 
@@ -53,12 +53,12 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
-  hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
+  hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
 
   env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.cc.isClang [ "-std=c11" ]);
 
   # darwin currently lacks a pure `pgrep` which is extensively used here
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [ which tcl ps ] ++ lib.optionals stdenv.hostPlatform.isStatic [ getconf ];
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/servers/nosql/rethinkdb/default.nix b/pkgs/servers/nosql/rethinkdb/default.nix
index 2ba228dd699b..03aed49f564b 100644
--- a/pkgs/servers/nosql/rethinkdb/default.nix
+++ b/pkgs/servers/nosql/rethinkdb/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
     patchShebangs .
   '';
 
-  configureFlags = lib.optionals (!stdenv.isDarwin) [
+  configureFlags = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     "--with-jemalloc"
     "--lib-path=${jemalloc}/lib"
   ];
@@ -31,8 +31,8 @@ stdenv.mkDerivation rec {
   makeFlags = [ "rethinkdb" ];
 
   buildInputs = [ protobuf boost zlib curl openssl icu ]
-    ++ lib.optional (!stdenv.isDarwin) jemalloc
-    ++ lib.optional stdenv.isDarwin libtool;
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) jemalloc
+    ++ lib.optional stdenv.hostPlatform.isDarwin libtool;
 
   nativeBuildInputs = [ which m4 python3Packages.python makeWrapper ];
 
diff --git a/pkgs/servers/nostr-rs-relay/default.nix b/pkgs/servers/nostr-rs-relay/default.nix
index db7dd125567c..c63f4d2a057f 100644
--- a/pkgs/servers/nostr-rs-relay/default.nix
+++ b/pkgs/servers/nostr-rs-relay/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-+agmlg6tAnEJ5o586fUY7V4fdNScDPKCbaZqt7R3gqg=";
 
   buildInputs = [ openssl.dev ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/servers/ombi/default.nix b/pkgs/servers/ombi/default.nix
index 6e6ece8ea7cb..a9fb9aa33586 100644
--- a/pkgs/servers/ombi/default.nix
+++ b/pkgs/servers/ombi/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, makeWrapper, autoPatchelfHook, fixDarwinDylibNames, zlib, krb5, openssl, icu, nixosTests }:
 
 let
-  os = if stdenv.isDarwin then "osx" else "linux";
+  os = if stdenv.hostPlatform.isDarwin then "osx" else "linux";
   arch = {
     x86_64-linux = "x64";
     aarch64-linux = "arm64";
diff --git a/pkgs/servers/openvscode-server/default.nix b/pkgs/servers/openvscode-server/default.nix
index bc1e7a3f5e18..f21693591672 100644
--- a/pkgs/servers/openvscode-server/default.nix
+++ b/pkgs/servers/openvscode-server/default.nix
@@ -103,9 +103,9 @@ stdenv.mkDerivation (finalAttrs: {
     moreutils
   ];
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [ libsecret ]
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ libsecret ]
     ++ (with xorg; [ libX11 libxkbfile libkrb5 ])
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Security
@@ -181,7 +181,7 @@ stdenv.mkDerivation (finalAttrs: {
     find -path "*@vscode/ripgrep" -type d \
       -execdir mkdir -p {}/bin \; \
       -execdir ln -s ${ripgrep}/bin/rg {}/bin/rg \;
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # use prebuilt binary for @parcel/watcher, which requires macOS SDK 10.13+
     # (see issue #101229)
     pushd ./remote/node_modules/@parcel/watcher
diff --git a/pkgs/servers/osmocom/osmo-bsc/default.nix b/pkgs/servers/osmocom/osmo-bsc/default.nix
index 647a54bf5328..ced3be6b350f 100644
--- a/pkgs/servers/osmocom/osmo-bsc/default.nix
+++ b/pkgs/servers/osmocom/osmo-bsc/default.nix
@@ -11,7 +11,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-ggsn/default.nix b/pkgs/servers/osmocom/osmo-ggsn/default.nix
index 87c1ee1d9573..f2c77d33ddb1 100644
--- a/pkgs/servers/osmocom/osmo-ggsn/default.nix
+++ b/pkgs/servers/osmocom/osmo-ggsn/default.nix
@@ -7,7 +7,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-hlr/default.nix b/pkgs/servers/osmocom/osmo-hlr/default.nix
index ec8d4622a848..a287619155ed 100644
--- a/pkgs/servers/osmocom/osmo-hlr/default.nix
+++ b/pkgs/servers/osmocom/osmo-hlr/default.nix
@@ -9,7 +9,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-hnbgw/default.nix b/pkgs/servers/osmocom/osmo-hnbgw/default.nix
index fc3798fde18d..e074e0100d28 100644
--- a/pkgs/servers/osmocom/osmo-hnbgw/default.nix
+++ b/pkgs/servers/osmocom/osmo-hnbgw/default.nix
@@ -13,7 +13,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-hnodeb/default.nix b/pkgs/servers/osmocom/osmo-hnodeb/default.nix
index 9455b14aad2a..27cf6c04f41a 100644
--- a/pkgs/servers/osmocom/osmo-hnodeb/default.nix
+++ b/pkgs/servers/osmocom/osmo-hnodeb/default.nix
@@ -13,7 +13,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-iuh/default.nix b/pkgs/servers/osmocom/osmo-iuh/default.nix
index 98629719ee8d..55add5a09b73 100644
--- a/pkgs/servers/osmocom/osmo-iuh/default.nix
+++ b/pkgs/servers/osmocom/osmo-iuh/default.nix
@@ -12,7 +12,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-mgw/default.nix b/pkgs/servers/osmocom/osmo-mgw/default.nix
index 23959b3be9ec..08774c723651 100644
--- a/pkgs/servers/osmocom/osmo-mgw/default.nix
+++ b/pkgs/servers/osmocom/osmo-mgw/default.nix
@@ -9,7 +9,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-msc/default.nix b/pkgs/servers/osmocom/osmo-msc/default.nix
index 679c88e5cff9..352489af8b68 100644
--- a/pkgs/servers/osmocom/osmo-msc/default.nix
+++ b/pkgs/servers/osmocom/osmo-msc/default.nix
@@ -14,7 +14,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-pcu/default.nix b/pkgs/servers/osmocom/osmo-pcu/default.nix
index 74f56957059b..a8b2000ec852 100644
--- a/pkgs/servers/osmocom/osmo-pcu/default.nix
+++ b/pkgs/servers/osmocom/osmo-pcu/default.nix
@@ -8,7 +8,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-sgsn/default.nix b/pkgs/servers/osmocom/osmo-sgsn/default.nix
index d9ca0d72084c..a182986ee27c 100644
--- a/pkgs/servers/osmocom/osmo-sgsn/default.nix
+++ b/pkgs/servers/osmocom/osmo-sgsn/default.nix
@@ -12,7 +12,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/osmocom/osmo-sip-connector/default.nix b/pkgs/servers/osmocom/osmo-sip-connector/default.nix
index c10361f119b3..b1f810d0f5f7 100644
--- a/pkgs/servers/osmocom/osmo-sip-connector/default.nix
+++ b/pkgs/servers/osmocom/osmo-sip-connector/default.nix
@@ -9,7 +9,7 @@
 }:
 
 let
-  inherit (stdenv) isLinux;
+  inherit (stdenv.hostPlatform) isLinux;
 in
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/servers/oxigraph/default.nix b/pkgs/servers/oxigraph/default.nix
index 868ec8f8bd39..091b2037d235 100644
--- a/pkgs/servers/oxigraph/default.nix
+++ b/pkgs/servers/oxigraph/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [
     rustPlatform.bindgenHook
   ];
-  buildInputs = lib.optionals stdenv.isDarwin [ IOKit Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ IOKit Security ];
 
   cargoBuildFlags = [ "--package" "oxigraph_server" ];
 
diff --git a/pkgs/servers/pim6sd/default.nix b/pkgs/servers/pim6sd/default.nix
index e1bc6ce48ff4..81b60d46e28b 100644
--- a/pkgs/servers/pim6sd/default.nix
+++ b/pkgs/servers/pim6sd/default.nix
@@ -19,6 +19,6 @@ stdenv.mkDerivation rec {
     license = licenses.bsd3;
     maintainers = with maintainers; [ hexa ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/pim6sd.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/pim6sd.x86_64-darwin
   };
 }
diff --git a/pkgs/servers/piping-server-rust/default.nix b/pkgs/servers/piping-server-rust/default.nix
index f3cc1c5543c4..0e081884e4cf 100644
--- a/pkgs/servers/piping-server-rust/default.nix
+++ b/pkgs/servers/piping-server-rust/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-YSiClSnjgqFqT2IGJoatcy7j3NUKcff826AvJ/+RNNU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security ];
 
   meta = with lib; {
     description = "Infinitely transfer between every device over pure HTTP with pipes or browsers";
diff --git a/pkgs/servers/polaris/default.nix b/pkgs/servers/polaris/default.nix
index b19eb1c47e7d..002a04f4f62e 100644
--- a/pkgs/servers/polaris/default.nix
+++ b/pkgs/servers/polaris/default.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-PnNLSL6YIpM6b3+oCh2eNRNPpCKyvnWEW7uNaYTKzAU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.Security
   ];
 
diff --git a/pkgs/servers/prowlarr/default.nix b/pkgs/servers/prowlarr/default.nix
index 6421688976c2..5e24932517da 100644
--- a/pkgs/servers/prowlarr/default.nix
+++ b/pkgs/servers/prowlarr/default.nix
@@ -6,9 +6,9 @@ let
   unsupported = throw "Unsupported system ${stdenv.hostPlatform.system} for ${pname}";
 
   os =
-    if stdenv.isDarwin then
+    if stdenv.hostPlatform.isDarwin then
       "osx"
-    else if stdenv.isLinux then
+    else if stdenv.hostPlatform.isLinux then
       "linux"
     else
       unsupported;
diff --git a/pkgs/servers/ps3netsrv/default.nix b/pkgs/servers/ps3netsrv/default.nix
index 30ca1318b9cf..4d9e221a30b9 100644
--- a/pkgs/servers/ps3netsrv/default.nix
+++ b/pkgs/servers/ps3netsrv/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     mbedtls
   ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Doff64_t=off_t";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Doff64_t=off_t";
 
   postInstall = ''
     install -Dm644 ../LICENSE.TXT $out/usr/share/licenses/${pname}/LICENSE.TXT
diff --git a/pkgs/servers/pulseaudio/default.nix b/pkgs/servers/pulseaudio/default.nix
index 0186de73fddf..44f89234ec6d 100644
--- a/pkgs/servers/pulseaudio/default.nix
+++ b/pkgs/servers/pulseaudio/default.nix
@@ -21,15 +21,15 @@
 
 , airtunesSupport ? false
 
-, bluetoothSupport ? stdenv.isLinux
+, bluetoothSupport ? stdenv.hostPlatform.isLinux
 , advancedBluetoothCodecs ? false
 
 , remoteControlSupport ? false
 
 , zeroconfSupport ? false
 
-, alsaSupport ? stdenv.isLinux
-, udevSupport ? stdenv.isLinux
+, alsaSupport ? stdenv.hostPlatform.isLinux
+, udevSupport ? stdenv.hostPlatform.isLinux
 
 , # Whether to build only the library.
   libOnly ? false
@@ -68,23 +68,23 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [ pkg-config meson ninja makeWrapper perlPackages.perl perlPackages.XMLParser m4 ]
-    ++ lib.optionals stdenv.isLinux [ glib ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ glib ]
     # gstreamer plugin discovery requires wrapping
     ++ lib.optional (bluetoothSupport && advancedBluetoothCodecs) wrapGAppsHook3;
 
   propagatedBuildInputs =
-    lib.optionals stdenv.isLinux [ libcap ];
+    lib.optionals stdenv.hostPlatform.isLinux [ libcap ];
 
   buildInputs =
     [ libtool libsndfile soxr speexdsp fftwFloat check ]
-    ++ lib.optionals stdenv.isLinux [ glib dbus ]
-    ++ lib.optionals stdenv.isDarwin [ AudioUnit Cocoa CoreServices CoreAudio libintl ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ glib dbus ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AudioUnit Cocoa CoreServices CoreAudio libintl ]
     ++ lib.optionals (!libOnly) (
       [ libasyncns webrtc-audio-processing_1 ]
       ++ lib.optional jackaudioSupport libjack2
       ++ lib.optionals x11Support [ xorg.libICE xorg.libSM xorg.libX11 xorg.libXi xorg.libXtst ]
       ++ lib.optional useSystemd systemd
-      ++ lib.optionals stdenv.isLinux [ alsa-lib udev ]
+      ++ lib.optionals stdenv.hostPlatform.isLinux [ alsa-lib udev ]
       ++ lib.optional airtunesSupport openssl
       ++ lib.optionals bluetoothSupport [ bluez5 sbc ]
       # aptX and LDAC codecs are in gst-plugins-bad so far, rtpldacpay is in -good
@@ -104,7 +104,7 @@ stdenv.mkDerivation rec {
     (lib.mesonBool "doxygen" false)
     (lib.mesonEnable "elogind" false)
     # gsettings does not support cross-compilation
-    (lib.mesonEnable "gsettings" (stdenv.isLinux && (stdenv.buildPlatform == stdenv.hostPlatform)))
+    (lib.mesonEnable "gsettings" (stdenv.hostPlatform.isLinux && (stdenv.buildPlatform == stdenv.hostPlatform)))
     (lib.mesonEnable "gstreamer" false)
     (lib.mesonEnable "gtk" false)
     (lib.mesonEnable "jack" (jackaudioSupport && !libOnly))
@@ -128,10 +128,10 @@ stdenv.mkDerivation rec {
     # renaming the unwrapped binaries (see below)
     "--bindir=${placeholder "out"}/.bin-unwrapped"
   ]
-  ++ lib.optionals (stdenv.isLinux && useSystemd) [
+  ++ lib.optionals (stdenv.hostPlatform.isLinux && useSystemd) [
     (lib.mesonOption "systemduserunitdir" "${placeholder "out"}/lib/systemd/user")
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     (lib.mesonEnable "consolekit" false)
     (lib.mesonEnable "dbus" false)
     (lib.mesonEnable "glib" false)
@@ -139,7 +139,7 @@ stdenv.mkDerivation rec {
   ];
 
   # tests fail on Darwin because of timeouts
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   preCheck = ''
     export HOME=$(mktemp -d)
   '';
@@ -156,13 +156,13 @@ stdenv.mkDerivation rec {
     cp config.h $dev/include/pulse
   '';
 
-  preFixup = lib.optionalString (stdenv.isLinux  && (stdenv.hostPlatform == stdenv.buildPlatform)) ''
+  preFixup = lib.optionalString (stdenv.hostPlatform.isLinux  && (stdenv.hostPlatform == stdenv.buildPlatform)) ''
     wrapProgram $out/libexec/pulse/gsettings-helper \
      --prefix XDG_DATA_DIRS : "$out/share/gsettings-schemas/${pname}-${version}" \
      --prefix GIO_EXTRA_MODULES : "${lib.getLib dconf}/lib/gio/modules"
   ''
   # add .so symlinks for modules to be found under macOS
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     for file in $out/lib/pulseaudio/modules/*.dylib; do
       ln -s "''$file" "''${file%.dylib}.so"
       ln -s "''$file" "$out/lib/pulseaudio/''$(basename ''$file .dylib).so"
diff --git a/pkgs/servers/radarr/default.nix b/pkgs/servers/radarr/default.nix
index 896e8b3d1f1a..d0ef6198f41a 100644
--- a/pkgs/servers/radarr/default.nix
+++ b/pkgs/servers/radarr/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, mono, libmediainfo, sqlite, curl, makeWrapper, icu, dotnet-runtime, openssl, nixosTests, zlib }:
 
 let
-  os = if stdenv.isDarwin then "osx" else "linux";
+  os = if stdenv.hostPlatform.isDarwin then "osx" else "linux";
   arch = {
     x86_64-linux = "x64";
     aarch64-linux = "arm64";
diff --git a/pkgs/servers/readarr/default.nix b/pkgs/servers/readarr/default.nix
index a0c1cea2c586..3a67b592fcc3 100644
--- a/pkgs/servers/readarr/default.nix
+++ b/pkgs/servers/readarr/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, libmediainfo, sqlite, curl, makeWrapper, icu, dotnet-runtime, openssl, nixosTests, zlib }:
 
 let
-  os = if stdenv.isDarwin then "osx" else "linux";
+  os = if stdenv.hostPlatform.isDarwin then "osx" else "linux";
   arch = {
     x86_64-linux = "x64";
     aarch64-linux = "arm64";
diff --git a/pkgs/servers/redpanda/default.nix b/pkgs/servers/redpanda/default.nix
index 5202cce75b9e..231f6ee216a5 100644
--- a/pkgs/servers/redpanda/default.nix
+++ b/pkgs/servers/redpanda/default.nix
@@ -1,5 +1,5 @@
 { buildGoModule
-, doCheck ? !stdenv.isDarwin # Can't start localhost test server in MacOS sandbox.
+, doCheck ? !stdenv.hostPlatform.isDarwin # Can't start localhost test server in MacOS sandbox.
 , fetchFromGitHub
 , installShellFiles
 , lib
diff --git a/pkgs/servers/roapi/http.nix b/pkgs/servers/roapi/http.nix
index 019c979b47a2..8c0dc4ee59f2 100644
--- a/pkgs/servers/roapi/http.nix
+++ b/pkgs/servers/roapi/http.nix
@@ -5,7 +5,7 @@
 let
   pname = "roapi-http";
   version = "0.6.0";
-  target = lib.optionalString stdenv.isDarwin "apple-darwin";
+  target = lib.optionalString stdenv.hostPlatform.isDarwin "apple-darwin";
 in
 # TODO build from source, currently compilation fails on darwin on snmalloc with
 #  ./mem/../ds/../pal/pal_apple.h:277:64: error: use of undeclared identifier 'kCCSuccess'
diff --git a/pkgs/servers/rpiplay/default.nix b/pkgs/servers/rpiplay/default.nix
index 90f773c73db1..8ca4cb534197 100644
--- a/pkgs/servers/rpiplay/default.nix
+++ b/pkgs/servers/rpiplay/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/FD-/RPiPlay";
     description = "Open-source implementation of an AirPlay mirroring server";
     license = licenses.gpl3Plus;
diff --git a/pkgs/servers/rtrtr/default.nix b/pkgs/servers/rtrtr/default.nix
index fa5b4a30c63a..3697043c246e 100644
--- a/pkgs/servers/rtrtr/default.nix
+++ b/pkgs/servers/rtrtr/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-ToJLE4nqgTqg5D4Qh2zi+wjmcdwDo0aupoDwKJCTwnM=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
   nativeBuildInputs = [ pkg-config ];
 
   buildNoDefaultFeatures = true;
diff --git a/pkgs/servers/rustdesk-server/default.nix b/pkgs/servers/rustdesk-server/default.nix
index 14cc9afcf484..3b6ddf3bb1ec 100644
--- a/pkgs/servers/rustdesk-server/default.nix
+++ b/pkgs/servers/rustdesk-server/default.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libsodium
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/servers/rustypaste/default.nix b/pkgs/servers/rustypaste/default.nix
index 97fdacecb9db..f0a1fc8c3b9c 100644
--- a/pkgs/servers/rustypaste/default.nix
+++ b/pkgs/servers/rustypaste/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-b9KZzevaTl52pduN4gkF8k6yqgDcE8x5sOwmPxzYfWA=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/servers/samba/4.x.nix b/pkgs/servers/samba/4.x.nix
index e2a9345d4c07..1e0f60224b5f 100644
--- a/pkgs/servers/samba/4.x.nix
+++ b/pkgs/servers/samba/4.x.nix
@@ -45,9 +45,9 @@
 , enableRegedit ? true, ncurses
 , enableCephFS ? false, ceph
 , enableGlusterFS ? false, glusterfs, libuuid
-, enableAcl ? (!stdenv.isDarwin), acl
-, enableLibunwind ? (!stdenv.isDarwin), libunwind
-, enablePam ? (!stdenv.isDarwin), pam
+, enableAcl ? (!stdenv.hostPlatform.isDarwin), acl
+, enableLibunwind ? (!stdenv.hostPlatform.isDarwin), libunwind
+, enablePam ? (!stdenv.hostPlatform.isDarwin), pam
 }:
 
 let
@@ -100,10 +100,10 @@ stdenv.mkDerivation (finalAttrs: {
     docbook_xml_dtd_45
     cmocka
     rpcsvc-proto
-  ] ++ optionals stdenv.isLinux [
+  ] ++ optionals stdenv.hostPlatform.isLinux [
     buildPackages.stdenv.cc
   ] ++ optional (stdenv.buildPlatform != stdenv.hostPlatform) samba # asn1_compile/compile_et
-    ++ optionals stdenv.isDarwin [
+    ++ optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ];
 
@@ -124,16 +124,16 @@ stdenv.mkDerivation (finalAttrs: {
     libtasn1
     tdb
     libxcrypt
-  ] ++ optionals stdenv.isLinux [ liburing systemd ]
-    ++ optionals stdenv.isDarwin [ libiconv ]
+  ] ++ optionals stdenv.hostPlatform.isLinux [ liburing systemd ]
+    ++ optionals stdenv.hostPlatform.isDarwin [ libiconv ]
     ++ optionals enableLDAP [ openldap.dev python3Packages.markdown ]
-    ++ optionals (!enableLDAP && stdenv.isLinux) [ ldb talloc tevent ]
-    ++ optional (enablePrinting && stdenv.isLinux) cups
+    ++ optionals (!enableLDAP && stdenv.hostPlatform.isLinux) [ ldb talloc tevent ]
+    ++ optional (enablePrinting && stdenv.hostPlatform.isLinux) cups
     ++ optional enableMDNS avahi
     ++ optionals enableDomainController [ gpgme lmdb python3Packages.dnspython ]
     ++ optional enableRegedit ncurses
-    ++ optional (enableCephFS && stdenv.isLinux) (lib.getDev ceph)
-    ++ optionals (enableGlusterFS && stdenv.isLinux) [ glusterfs libuuid ]
+    ++ optional (enableCephFS && stdenv.hostPlatform.isLinux) (lib.getDev ceph)
+    ++ optionals (enableGlusterFS && stdenv.hostPlatform.isLinux) [ glusterfs libuuid ]
     ++ optional enableAcl acl
     ++ optional enableLibunwind libunwind
     ++ optional enablePam pam;
@@ -165,7 +165,7 @@ stdenv.mkDerivation (finalAttrs: {
   ++ optionals (!enableLDAP) [
     "--without-ldap"
     "--without-ads"
-  ] ++ optionals (!enableLDAP && stdenv.isLinux) [
+  ] ++ optionals (!enableLDAP && stdenv.hostPlatform.isLinux) [
     "--bundled-libraries=!ldb,!pyldb-util!talloc,!pytalloc-util,!tevent,!tdb,!pytdb"
   ] ++ optional enableLibunwind "--with-libunwind"
     ++ optional enableProfiling "--with-profiling-data"
@@ -212,12 +212,12 @@ stdenv.mkDerivation (finalAttrs: {
     read -r -d "" SCRIPT << EOF || true
     [ -z "\$SAMBA_LIBS" ] && exit 1;
     BIN='{}';
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     OLD_LIBS="\$(patchelf --print-rpath "\$BIN" 2>/dev/null | tr ':' '\n')";
     ALL_LIBS="\$(echo -e "\$SAMBA_LIBS\n\$OLD_LIBS" | sort | uniq | tr '\n' ':')";
     patchelf --set-rpath "\$ALL_LIBS" "\$BIN" 2>/dev/null || exit $?;
     patchelf --shrink-rpath "\$BIN";
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id \$BIN \$BIN
     for old_rpath in \$(otool -L \$BIN | grep /private/tmp/ | awk '{print \$1}'); do
       new_rpath=\$(find \$SAMBA_LIBS -name \$(basename \$old_rpath) | head -n 1)
diff --git a/pkgs/servers/search/lnx/default.nix b/pkgs/servers/search/lnx/default.nix
index 447602b0463f..7cda5d44c442 100644
--- a/pkgs/servers/search/lnx/default.nix
+++ b/pkgs/servers/search/lnx/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage {
       "compose-0.1.0" = "sha256-zcniGI3wa+gI3jFTDqHcesX+6hAtNEbW81ABPUcFTXk=";
     };
   };
-  buildInputs = lib.optionals stdenv.isDarwin [ DiskArbitration Foundation ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ DiskArbitration Foundation ];
   meta = with lib; {
     description = "Insanely fast, Feature-rich searching. lnx is the adaptable, typo tollerant deployment of the tantivy search engine. Standing on the shoulders of giants.";
     mainProgram = "lnx";
diff --git a/pkgs/servers/search/meilisearch/default.nix b/pkgs/servers/search/meilisearch/default.nix
index cbb440086976..a58af212b20a 100644
--- a/pkgs/servers/search/meilisearch/default.nix
+++ b/pkgs/servers/search/meilisearch/default.nix
@@ -43,7 +43,7 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ rustPlatform.bindgenHook ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/servers/search/qdrant/default.nix b/pkgs/servers/search/qdrant/default.nix
index f9669759171a..587c4aa1d170 100644
--- a/pkgs/servers/search/qdrant/default.nix
+++ b/pkgs/servers/search/qdrant/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     rust-jemalloc-sys
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/servers/search/quickwit/default.nix b/pkgs/servers/search/quickwit/default.nix
index ccc32cb90056..8f89e1893c3b 100644
--- a/pkgs/servers/search/quickwit/default.nix
+++ b/pkgs/servers/search/quickwit/default.nix
@@ -82,7 +82,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     rust-jemalloc-sys
-  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoLock = {
     lockFile = ./Cargo.lock;
diff --git a/pkgs/servers/search/typesense/default.nix b/pkgs/servers/search/typesense/default.nix
index 762cc190f242..2a641cd752fc 100644
--- a/pkgs/servers/search/typesense/default.nix
+++ b/pkgs/servers/search/typesense/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
     inherit hash;
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
   ];
 
diff --git a/pkgs/servers/shairplay/default.nix b/pkgs/servers/shairplay/default.nix
index 2a7e643b60fd..63de8df58fd8 100644
--- a/pkgs/servers/shairplay/default.nix
+++ b/pkgs/servers/shairplay/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   # the build will fail without complaining about a reference to /tmp
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf \
       --set-rpath "${lib.makeLibraryPath buildInputs}:$out/lib" \
       $out/bin/shairplay
diff --git a/pkgs/servers/shairport-sync/default.nix b/pkgs/servers/shairport-sync/default.nix
index a9043f65331d..f74813cd4608 100644
--- a/pkgs/servers/shairport-sync/default.nix
+++ b/pkgs/servers/shairport-sync/default.nix
@@ -28,8 +28,8 @@
 , enablePipewire ? true
 , enableJack ? true
 , enableMetadata ? false
-, enableMpris ? stdenv.isLinux
-, enableDbus ? stdenv.isLinux
+, enableMpris ? stdenv.hostPlatform.isLinux
+, enableDbus ? stdenv.hostPlatform.isLinux
 , enableSoxr ? true
 , enableLibdaemon ? false
 }:
@@ -81,7 +81,7 @@ stdenv.mkDerivation rec {
     libuuid
     ffmpeg
   ]
-  ++ optional stdenv.isLinux glib;
+  ++ optional stdenv.hostPlatform.isLinux glib;
 
   postPatch = ''
     sed -i -e 's/G_BUS_TYPE_SYSTEM/G_BUS_TYPE_SESSION/g' dbus-service.c
diff --git a/pkgs/servers/shishi/default.nix b/pkgs/servers/shishi/default.nix
index 4b3060d90b04..926486c73c97 100644
--- a/pkgs/servers/shishi/default.nix
+++ b/pkgs/servers/shishi/default.nix
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
   ];
 
   env.NIX_CFLAGS_COMPILE
-    = optionalString stdenv.isDarwin "-DBIND_8_COMPAT";
+    = optionalString stdenv.hostPlatform.isDarwin "-DBIND_8_COMPAT";
 
   doCheck = true;
 
diff --git a/pkgs/servers/simple-http-server/default.nix b/pkgs/servers/simple-http-server/default.nix
index ff83e3f62d08..cb4fe1300062 100644
--- a/pkgs/servers/simple-http-server/default.nix
+++ b/pkgs/servers/simple-http-server/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/servers/sip/freeswitch/default.nix b/pkgs/servers/sip/freeswitch/default.nix
index 1e7021c7a7e5..9d11ad68a405 100644
--- a/pkgs/servers/sip/freeswitch/default.nix
+++ b/pkgs/servers/sip/freeswitch/default.nix
@@ -90,7 +90,7 @@ defaultModules = mods: with mods; [
   xml_int.cdr
   xml_int.rpc
   xml_int.scgi
-] ++ lib.optionals stdenv.isLinux [ endpoints.gsmopen ];
+] ++ lib.optionals stdenv.hostPlatform.isLinux [ endpoints.gsmopen ];
 
 enabledModules = (if modules != null then modules else defaultModules) availableModules;
 
@@ -134,7 +134,7 @@ stdenv.mkDerivation rec {
     libuuid libxcrypt
   ]
   ++ lib.unique (lib.concatMap (mod: mod.inputs) enabledModules)
-  ++ lib.optionals stdenv.isDarwin [ SystemConfiguration ];
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [ SystemConfiguration ];
 
   enableParallelBuilding = true;
 
@@ -168,6 +168,6 @@ stdenv.mkDerivation rec {
     license = lib.licenses.mpl11;
     maintainers = with lib.maintainers; [ mikaelfangel ];
     platforms = with lib.platforms; unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/servers/snac2/default.nix b/pkgs/servers/snac2/default.nix
index c4e30fa74f66..0b8f718d0c96 100644
--- a/pkgs/servers/snac2/default.nix
+++ b/pkgs/servers/snac2/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "PREFIX=$(out)" ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Dst_mtim=st_mtimespec"
     "-Dst_ctim=st_ctimespec"
   ]);
diff --git a/pkgs/servers/sozu/default.nix b/pkgs/servers/sozu/default.nix
index f0467f7f9c27..10427438e27d 100644
--- a/pkgs/servers/sozu/default.nix
+++ b/pkgs/servers/sozu/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ protobuf ];
 
   buildInputs =
-    lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+    lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
   doCheck = false;
 
@@ -47,6 +47,6 @@ rustPlatform.buildRustPackage rec {
     maintainers = with maintainers; [ Br1ght0ne gaelreyrol ];
     mainProgram = "sozu";
     # error[E0432]: unresolved import `std::arch::x86_64`
-    broken = !stdenv.isx86_64;
+    broken = !stdenv.hostPlatform.isx86_64;
   };
 }
diff --git a/pkgs/servers/sql/mariadb/connector-c/default.nix b/pkgs/servers/sql/mariadb/connector-c/default.nix
index a2da81a0094f..e27179e8ab2f 100644
--- a/pkgs/servers/sql/mariadb/connector-c/default.nix
+++ b/pkgs/servers/sql/mariadb/connector-c/default.nix
@@ -44,7 +44,7 @@ in stdenv.mkDerivation {
   '';
 
   # The cmake setup-hook uses $out/lib by default, this is not the case here.
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     cmakeFlagsArray+=("-DCMAKE_INSTALL_NAME_DIR=$out/lib/mariadb")
   '';
 
diff --git a/pkgs/servers/sql/materialize/default.nix b/pkgs/servers/sql/materialize/default.nix
index 346e83f12206..1738b4fb92d6 100644
--- a/pkgs/servers/sql/materialize/default.nix
+++ b/pkgs/servers/sql/materialize/default.nix
@@ -101,13 +101,13 @@ rustPlatform.buildRustPackage rec {
     rustPlatform.bindgenHook
   ]
     # Provides the mig command used by the krb5-src build script
-    ++ lib.optional stdenv.isDarwin bootstrap_cmds;
+    ++ lib.optional stdenv.hostPlatform.isDarwin bootstrap_cmds;
 
   # Needed to get openssl-sys to use pkg-config.
   OPENSSL_NO_VENDOR = 1;
 
   buildInputs = [ openssl rdkafka libclang ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv DiskArbitration Foundation ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv DiskArbitration Foundation ];
 
   # the check phase requires linking with rocksdb which can be a problem since
   # the rust rocksdb crate is not updated very often.
diff --git a/pkgs/servers/sql/mysql/8.0.x.nix b/pkgs/servers/sql/mysql/8.0.x.nix
index 4a072ae3f46b..dbd09f9516a4 100644
--- a/pkgs/servers/sql/mysql/8.0.x.nix
+++ b/pkgs/servers/sql/mysql/8.0.x.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ bison cmake pkg-config ]
-    ++ lib.optionals (!stdenv.isDarwin) [ rpcsvc-proto ];
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ rpcsvc-proto ];
 
   patches = [
     ./no-force-outline-atomics.patch # Do not force compilers to turn on -moutline-atomics switch
@@ -28,9 +28,9 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     boost (curl.override { inherit openssl; }) icu libedit libevent lz4 ncurses openssl protobuf re2 readline zlib
     zstd libfido2
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     numactl libtirpc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools CoreServices developer_cmds DarwinTools
   ];
 
diff --git a/pkgs/servers/sql/percona-server/innovation.nix b/pkgs/servers/sql/percona-server/innovation.nix
index 27272410033f..61b2ff7bb4a1 100644
--- a/pkgs/servers/sql/percona-server/innovation.nix
+++ b/pkgs/servers/sql/percona-server/innovation.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation (finalAttrs: {
     bison cmake pkg-config makeWrapper
     # required for scripts/CMakeLists.txt
     coreutils gnugrep procps
-  ] ++ lib.optionals (!stdenv.isDarwin) [ rpcsvc-proto ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ rpcsvc-proto ];
 
   patches = [
     ./no-force-outline-atomics.patch # Do not force compilers to turn on -moutline-atomics switch
@@ -45,13 +45,13 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     boost (curl.override { inherit openssl; }) icu libedit libevent lz4 ncurses openssl protobuf re2 readline zlib
     zstd libfido2 openldap perl cyrus_sasl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     numactl libtirpc systemd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools CoreServices developer_cmds DarwinTools
   ]
-  ++ lib.optional (stdenv.isLinux && withJemalloc) jemalloc
-  ++ lib.optional (stdenv.isLinux && withTcmalloc) gperftools;
+  ++ lib.optional (stdenv.hostPlatform.isLinux && withJemalloc) jemalloc
+  ++ lib.optional (stdenv.hostPlatform.isLinux && withTcmalloc) gperftools;
 
   outputs = [ "out" "static" ];
 
@@ -81,12 +81,12 @@ stdenv.mkDerivation (finalAttrs: {
     "-DINSTALL_SHAREDIR=share/mysql"
 
 
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DWITH_SYSTEMD=1"
     "-DWITH_SYSTEMD_DEBUG=1"
   ]
-  ++ lib.optional (stdenv.isLinux && withJemalloc) "-DWITH_JEMALLOC=1"
-  ++ lib.optional (stdenv.isLinux && withTcmalloc) "-DWITH_TCMALLOC=1";
+  ++ lib.optional (stdenv.hostPlatform.isLinux && withJemalloc) "-DWITH_JEMALLOC=1"
+  ++ lib.optional (stdenv.hostPlatform.isLinux && withTcmalloc) "-DWITH_TCMALLOC=1";
 
   postInstall = ''
     moveToOutput "lib/*.a" $static
@@ -97,7 +97,7 @@ stdenv.mkDerivation (finalAttrs: {
     wrapProgram $out/bin/mysql_config --prefix PATH : ${lib.makeBinPath [ coreutils gnused ]}
     wrapProgram $out/bin/ps_mysqld_helper --prefix PATH : ${lib.makeBinPath [ coreutils gnugrep ]}
     wrapProgram $out/bin/ps-admin --prefix PATH : ${lib.makeBinPath [ coreutils gnugrep ]}
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     wrapProgram $out/bin/mysqld_multi --prefix PATH : ${lib.makeBinPath [ coreutils gnugrep ]}
   '';
 
diff --git a/pkgs/servers/sql/percona-server/lts.nix b/pkgs/servers/sql/percona-server/lts.nix
index 19e81654dd7b..352b0239c429 100644
--- a/pkgs/servers/sql/percona-server/lts.nix
+++ b/pkgs/servers/sql/percona-server/lts.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
     bison cmake pkg-config makeWrapper
     # required for scripts/CMakeLists.txt
     coreutils gnugrep procps
-  ] ++ lib.optionals (!stdenv.isDarwin) [ rpcsvc-proto ];
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ rpcsvc-proto ];
 
   patches = [
     ./no-force-outline-atomics.patch # Do not force compilers to turn on -moutline-atomics switch
@@ -39,9 +39,9 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     boost (curl.override { inherit openssl; }) icu libedit libevent lz4 ncurses openssl protobuf re2 readline zlib
     zstd libfido2 openldap perl cyrus_sasl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     numactl libtirpc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools CoreServices developer_cmds DarwinTools
   ];
 
diff --git a/pkgs/servers/sql/pgbouncer/default.nix b/pkgs/servers/sql/pgbouncer/default.nix
index 17bb24562d7e..dfffa518a5fd 100644
--- a/pkgs/servers/sql/pgbouncer/default.nix
+++ b/pkgs/servers/sql/pgbouncer/default.nix
@@ -11,9 +11,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ libevent openssl c-ares ]
-    ++ lib.optional stdenv.isLinux systemd;
+    ++ lib.optional stdenv.hostPlatform.isLinux systemd;
   enableParallelBuilding = true;
-  configureFlags = lib.optional stdenv.isLinux "--with-systemd";
+  configureFlags = lib.optional stdenv.hostPlatform.isLinux "--with-systemd";
 
   passthru.tests = {
     pgbouncer = nixosTests.pgbouncer;
diff --git a/pkgs/servers/sql/pgcat/default.nix b/pkgs/servers/sql/pgcat/default.nix
index 49de401a75dd..525380e46f24 100644
--- a/pkgs/servers/sql/pgcat/default.nix
+++ b/pkgs/servers/sql/pgcat/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-QqwUEbWKSUuxzYjWpVpQuKZDiNib1gM2eZJ4y7XIzXY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/servers/sql/pgpool/default.nix b/pkgs/servers/sql/pgpool/default.nix
index f1762be17f2c..b4f5724bcf77 100644
--- a/pkgs/servers/sql/pgpool/default.nix
+++ b/pkgs/servers/sql/pgpool/default.nix
@@ -4,7 +4,7 @@
 , postgresql
 , openssl
 , libxcrypt
-, withPam ? stdenv.isLinux
+, withPam ? stdenv.hostPlatform.isLinux
 , pam
 }:
 
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     "sysconfdir=\${out}/etc"
   ];
 
-  patches = lib.optionals (stdenv.isDarwin) [
+  patches = lib.optionals (stdenv.hostPlatform.isDarwin) [
     # Build checks for strlcpy being available in the system, but doesn't
     # actually exclude its own copy from being built
     ./darwin-strlcpy.patch
diff --git a/pkgs/servers/sql/postgresql/ext/h3-pg.nix b/pkgs/servers/sql/postgresql/ext/h3-pg.nix
index 2b8edb366ffa..ae5252092530 100644
--- a/pkgs/servers/sql/postgresql/ext/h3-pg.nix
+++ b/pkgs/servers/sql/postgresql/ext/h3-pg.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation (finalAttrs: {
   postPatch = ''
     substituteInPlace CMakeLists.txt \
       --replace "add_subdirectory(cmake/h3)" "include_directories(${lib.getDev h3_4}/include/h3)"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace cmake/AddPostgreSQLExtension.cmake \
       --replace "INTERPROCEDURAL_OPTIMIZATION TRUE" ""
   '';
diff --git a/pkgs/servers/sql/postgresql/ext/lantern.nix b/pkgs/servers/sql/postgresql/ext/lantern.nix
index 1e632228663b..9a3e01d53537 100644
--- a/pkgs/servers/sql/postgresql/ext/lantern.nix
+++ b/pkgs/servers/sql/postgresql/ext/lantern.nix
@@ -74,6 +74,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = [ ];
     platforms = postgresql.meta.platforms;
     # error: use of undeclared identifier 'aligned_alloc'
-    broken = stdenv.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13";
+    broken = stdenv.hostPlatform.isDarwin && lib.versionOlder stdenv.hostPlatform.darwinMinVersion "10.13";
   };
 })
diff --git a/pkgs/servers/sql/postgresql/ext/pgvecto-rs/default.nix b/pkgs/servers/sql/postgresql/ext/pgvecto-rs/default.nix
index aca5c543cb24..e8b3af416ca7 100644
--- a/pkgs/servers/sql/postgresql/ext/pgvecto-rs/default.nix
+++ b/pkgs/servers/sql/postgresql/ext/pgvecto-rs/default.nix
@@ -93,7 +93,7 @@ in
 
   meta = with lib; {
     # Upstream removed support for PostgreSQL 12 and 13 on 0.3.0: https://github.com/tensorchord/pgvecto.rs/issues/343
-    broken = stdenv.isDarwin || (versionOlder postgresql.version "14");
+    broken = stdenv.hostPlatform.isDarwin || (versionOlder postgresql.version "14");
     description = "Scalable, Low-latency and Hybrid-enabled Vector Search in Postgres";
     homepage = "https://github.com/tensorchord/pgvecto.rs";
     license = licenses.asl20;
diff --git a/pkgs/servers/sql/postgresql/ext/postgis.nix b/pkgs/servers/sql/postgresql/ext/postgis.nix
index 240137846b24..109876b6e9d2 100644
--- a/pkgs/servers/sql/postgresql/ext/postgis.nix
+++ b/pkgs/servers/sql/postgresql/ext/postgis.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     json_c
     protobufc
     pcre2.dev
-  ] ++ lib.optional stdenv.isDarwin libiconv;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
   nativeBuildInputs = [
     perl
     pkg-config
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
     ln -s ${postgresql}/bin/postgres $out/bin/postgres
   '';
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
 
   preCheck = ''
     substituteInPlace regress/run_test.pl --replace-fail "/share/contrib/postgis" "$out/share/postgresql/contrib/postgis"
diff --git a/pkgs/servers/sql/postgresql/ext/timescaledb.nix b/pkgs/servers/sql/postgresql/ext/timescaledb.nix
index 0e5651085ea1..92b6ad4fea88 100644
--- a/pkgs/servers/sql/postgresql/ext/timescaledb.nix
+++ b/pkgs/servers/sql/postgresql/ext/timescaledb.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [ "-DSEND_TELEMETRY_DEFAULT=OFF" "-DREGRESS_CHECKS=OFF" "-DTAP_CHECKS=OFF" ]
     ++ lib.optionals (!enableUnfree) [ "-DAPACHE_ONLY=ON" ]
-    ++ lib.optionals stdenv.isDarwin [ "-DLINTER=OFF" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "-DLINTER=OFF" ];
 
   # Fix the install phase which tries to install into the pgsql extension dir,
   # and cannot be manually overridden. This is rather fragile but works OK.
diff --git a/pkgs/servers/sql/postgresql/generic.nix b/pkgs/servers/sql/postgresql/generic.nix
index 474ca2563ba1..69aa8a377443 100644
--- a/pkgs/servers/sql/postgresql/generic.nix
+++ b/pkgs/servers/sql/postgresql/generic.nix
@@ -103,8 +103,8 @@ let
       ++ lib.optionals systemdSupport' [ systemdLibs ]
       ++ lib.optionals pythonSupport [ python3 ]
       ++ lib.optionals gssSupport [ libkrb5 ]
-      ++ lib.optionals stdenv'.isLinux [ linux-pam ]
-      ++ lib.optionals (!stdenv'.isDarwin) [ libossp_uuid ];
+      ++ lib.optionals stdenv'.hostPlatform.isLinux [ linux-pam ]
+      ++ lib.optionals (!stdenv'.hostPlatform.isDarwin) [ libossp_uuid ];
 
     nativeBuildInputs = [
       makeWrapper
@@ -138,16 +138,16 @@ let
       "--with-system-tzdata=${tzdata}/share/zoneinfo"
       "--enable-debug"
       (lib.optionalString systemdSupport' "--with-systemd")
-      (if stdenv'.isDarwin then "--with-uuid=e2fs" else "--with-ossp-uuid")
+      (if stdenv'.hostPlatform.isDarwin then "--with-uuid=e2fs" else "--with-ossp-uuid")
     ] ++ lib.optionals lz4Enabled [ "--with-lz4" ]
       ++ lib.optionals zstdEnabled [ "--with-zstd" ]
       ++ lib.optionals gssSupport [ "--with-gssapi" ]
       ++ lib.optionals pythonSupport [ "--with-python" ]
       ++ lib.optionals jitSupport [ "--with-llvm" ]
-      ++ lib.optionals stdenv'.isLinux [ "--with-pam" ]
+      ++ lib.optionals stdenv'.hostPlatform.isLinux [ "--with-pam" ]
       # This could be removed once the upstream issue is resolved:
       # https://postgr.es/m/flat/427c7c25-e8e1-4fc5-a1fb-01ceff185e5b%40technowledgy.de
-      ++ lib.optionals (stdenv'.isDarwin && atLeast "16") [ "LDFLAGS_EX_BE=-Wl,-export_dynamic" ];
+      ++ lib.optionals (stdenv'.hostPlatform.isDarwin && atLeast "16") [ "LDFLAGS_EX_BE=-Wl,-export_dynamic" ];
 
     patches = [
       (if atLeast "16" then ./patches/relative-to-symlinks-16+.patch else ./patches/relative-to-symlinks.patch)
@@ -158,14 +158,14 @@ let
 
       (substituteAll {
         src = ./patches/locale-binary-path.patch;
-        locale = "${if stdenv.isDarwin then darwin.adv_cmds else lib.getBin stdenv.cc.libc}/bin/locale";
+        locale = "${if stdenv.hostPlatform.isDarwin then darwin.adv_cmds else lib.getBin stdenv.cc.libc}/bin/locale";
       })
     ] ++ lib.optionals stdenv'.hostPlatform.isMusl (
       # Using fetchurl instead of fetchpatch on purpose: https://github.com/NixOS/nixpkgs/issues/240141
       map fetchurl (lib.attrValues muslPatches)
-    ) ++ lib.optionals stdenv'.isLinux  [
+    ) ++ lib.optionals stdenv'.hostPlatform.isLinux  [
       (if atLeast "13" then ./patches/socketdir-in-run-13+.patch else ./patches/socketdir-in-run.patch)
-    ] ++ lib.optionals (stdenv'.isDarwin && olderThan "16") [
+    ] ++ lib.optionals (stdenv'.hostPlatform.isDarwin && olderThan "16") [
       ./patches/export-dynamic-darwin-15-.patch
     ];
 
@@ -229,7 +229,7 @@ let
         wrapProgram $out/bin/initdb --prefix PATH ":" ${glibc.bin}/bin
       '';
 
-    doCheck = !stdenv'.isDarwin;
+    doCheck = !stdenv'.hostPlatform.isDarwin;
     # autodetection doesn't seem to able to find this, but it's there.
     checkTarget = "check";
 
diff --git a/pkgs/servers/sql/proxysql/default.nix b/pkgs/servers/sql/proxysql/default.nix
index e0a6f23a4631..ed04908180ee 100644
--- a/pkgs/servers/sql/proxysql/default.nix
+++ b/pkgs/servers/sql/proxysql/default.nix
@@ -164,7 +164,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "High-performance MySQL proxy";
     mainProgram = "proxysql";
     homepage = "https://proxysql.com/";
diff --git a/pkgs/servers/sql/sqld/default.nix b/pkgs/servers/sql/sqld/default.nix
index db78ebafc812..79c52798c6b8 100644
--- a/pkgs/servers/sql/sqld/default.nix
+++ b/pkgs/servers/sql/sqld/default.nix
@@ -51,7 +51,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     sqlite
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   env.ZSTD_SYS_USE_PKG_CONFIG = true;
 
diff --git a/pkgs/servers/sqlpage/default.nix b/pkgs/servers/sqlpage/default.nix
index c7c06a6d50c4..c6055d601535 100644
--- a/pkgs/servers/sqlpage/default.nix
+++ b/pkgs/servers/sqlpage/default.nix
@@ -86,7 +86,7 @@ rustPlatform.buildRustPackage rec {
       sqlite
       zstd
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreFoundation
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/servers/squid/default.nix b/pkgs/servers/squid/default.nix
index 9229359d9159..998b2d9ada44 100644
--- a/pkgs/servers/squid/default.nix
+++ b/pkgs/servers/squid/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [
     perl openldap db cyrus_sasl expat libxml2 openssl
-  ] ++ lib.optionals stdenv.isLinux [ libcap pam systemd ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap pam systemd ];
 
   enableParallelBuilding = true;
 
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
     "--enable-delay-pools"
     "--enable-x-accelerator-vary"
     "--enable-htcp"
-  ] ++ lib.optional (stdenv.isLinux && !stdenv.hostPlatform.isMusl)
+  ] ++ lib.optional (stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isMusl)
     "--enable-linux-netfilter";
 
   doCheck = true;
diff --git a/pkgs/servers/sslh/default.nix b/pkgs/servers/sslh/default.nix
index a9ca0c8f2585..cfb15d6d54f8 100644
--- a/pkgs/servers/sslh/default.nix
+++ b/pkgs/servers/sslh/default.nix
@@ -13,9 +13,9 @@ stdenv.mkDerivation rec {
 
   postPatch = "patchShebangs *.sh";
 
-  buildInputs = [ libev libconfig perl pcre2 ] ++ lib.optionals stdenv.isLinux [ libcap tcp_wrappers ];
+  buildInputs = [ libev libconfig perl pcre2 ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap tcp_wrappers ];
 
-  makeFlags = lib.optionals stdenv.isLinux [ "USELIBCAP=1" "USELIBWRAP=1" ];
+  makeFlags = lib.optionals stdenv.hostPlatform.isLinux [ "USELIBCAP=1" "USELIBWRAP=1" ];
 
   postInstall = ''
     # install all flavours
diff --git a/pkgs/servers/static-web-server/default.nix b/pkgs/servers/static-web-server/default.nix
index 3e29f5aa42d7..b57dafed1d48 100644
--- a/pkgs/servers/static-web-server/default.nix
+++ b/pkgs/servers/static-web-server/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     })
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   # Some tests rely on timestamps newer than 18 Nov 1974 00:00:00
   preCheck = ''
diff --git a/pkgs/servers/sunshine/default.nix b/pkgs/servers/sunshine/default.nix
index 9b56cccf1528..6ced9624b741 100644
--- a/pkgs/servers/sunshine/default.nix
+++ b/pkgs/servers/sunshine/default.nix
@@ -139,7 +139,7 @@ stdenv'.mkDerivation rec {
     miniupnpc
   ] ++ lib.optionals cudaSupport [
     cudaPackages.cudatoolkit
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     intel-media-sdk
   ];
 
diff --git a/pkgs/servers/swego/default.nix b/pkgs/servers/swego/default.nix
index a44664809944..f26b33856d11 100644
--- a/pkgs/servers/swego/default.nix
+++ b/pkgs/servers/swego/default.nix
@@ -38,7 +38,7 @@ buildGoModule rec {
     maintainers = with maintainers; [ fab ];
     # darwin crashes with:
     # src/controllers/parsingArgs.go:130:4: undefined: PrintEmbeddedFiles
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "swego";
   };
 }
diff --git a/pkgs/servers/tailscale/default.nix b/pkgs/servers/tailscale/default.nix
index 10b88a04c707..b24131411987 100644
--- a/pkgs/servers/tailscale/default.nix
+++ b/pkgs/servers/tailscale/default.nix
@@ -39,7 +39,7 @@ buildGoModule {
 
   vendorHash = "sha256-HJEgBs2GOzXvRa95LdwySQmG4/+QwupFDBGrQT6Y2vE=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ makeWrapper ] ++ [ installShellFiles ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ makeWrapper ] ++ [ installShellFiles ];
 
   CGO_ENABLED = 0;
 
@@ -60,7 +60,7 @@ buildGoModule {
 
   postInstall = ''
     ln -s $out/bin/tailscaled $out/bin/tailscale
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/tailscaled \
       --prefix PATH : ${lib.makeBinPath [ iproute2 iptables getent shadow ]} \
       --suffix PATH : ${lib.makeBinPath [ procps ]}
diff --git a/pkgs/servers/teleport/generic.nix b/pkgs/servers/teleport/generic.nix
index 87719f03eb72..2fcdc7f4a655 100644
--- a/pkgs/servers/teleport/generic.nix
+++ b/pkgs/servers/teleport/generic.nix
@@ -54,7 +54,7 @@ let
     buildAndTestSubdir = "lib/srv/desktop/rdp/rdpclient";
 
     buildInputs = [ openssl ]
-      ++ lib.optionals stdenv.isDarwin [ CoreFoundation Security ];
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation Security ];
     nativeBuildInputs = [ pkg-config ];
 
     # https://github.com/NixOS/nixpkgs/issues/161570 ,
@@ -144,7 +144,7 @@ buildGoModule rec {
     ++ lib.optional withRdpClient "desktop_access_rdp";
 
   buildInputs = [ openssl libfido2 ]
-    ++ lib.optionals (stdenv.isDarwin && withRdpClient) [ CoreFoundation Security AppKit ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && withRdpClient) [ CoreFoundation Security AppKit ];
   nativeBuildInputs = [ makeWrapper pkg-config ];
 
   patches = extPatches ++ [
diff --git a/pkgs/servers/trezord/default.nix b/pkgs/servers/trezord/default.nix
index 247ac6832db3..3852f139935c 100644
--- a/pkgs/servers/trezord/default.nix
+++ b/pkgs/servers/trezord/default.nix
@@ -30,8 +30,8 @@ buildGoModule rec {
     })
   ];
 
-  propagatedBuildInputs = lib.optionals stdenv.isLinux [ trezor-udev-rules ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit ];
+  propagatedBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ trezor-udev-rules ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   ldflags = [
     "-s" "-w"
diff --git a/pkgs/servers/unpackerr/default.nix b/pkgs/servers/unpackerr/default.nix
index d3cb4c7d47b2..30091834a856 100644
--- a/pkgs/servers/unpackerr/default.nix
+++ b/pkgs/servers/unpackerr/default.nix
@@ -13,7 +13,7 @@ buildGoModule rec {
 
   vendorHash = "sha256-wWIw0gNn5tqRq0udzPy/n2OkiIVESpSotOSn2YlBNS4=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Cocoa WebKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa WebKit ];
 
   ldflags = [ "-s" "-w" "-X golift.io/version.Version=${version}" ];
 
diff --git a/pkgs/servers/ursadb/default.nix b/pkgs/servers/ursadb/default.nix
index c79156a8f3c2..c8111fc648b9 100644
--- a/pkgs/servers/ursadb/default.nix
+++ b/pkgs/servers/ursadb/default.nix
@@ -32,6 +32,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.bsd3;
     maintainers = with maintainers; [ msm ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 })
diff --git a/pkgs/servers/uwsgi/default.nix b/pkgs/servers/uwsgi/default.nix
index 1f874236fbd6..7d0729ee4621 100644
--- a/pkgs/servers/uwsgi/default.nix
+++ b/pkgs/servers/uwsgi/default.nix
@@ -9,9 +9,9 @@
 , zlib
 # plugins: list of strings, eg. [ "python2" "python3" ]
 , plugins ? []
-, pam, withPAM ? stdenv.isLinux
+, pam, withPAM ? stdenv.hostPlatform.isLinux
 , systemd, withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd
-, libcap, withCap ? stdenv.isLinux
+, libcap, withCap ? stdenv.hostPlatform.isLinux
 , python2, python3, ncurses
 , ruby, php
 , makeWrapper, fetchFromGitHub
@@ -92,7 +92,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   buildInputs =  [ jansson pcre libxcrypt ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [ expat zlib ]
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [ expat zlib ]
     ++ lib.optional withPAM pam
     ++ lib.optional withSystemd systemd
     ++ lib.optional withCap libcap
diff --git a/pkgs/servers/varnish/default.nix b/pkgs/servers/varnish/default.nix
index ddc190a2887a..8814bd41e04b 100644
--- a/pkgs/servers/varnish/default.nix
+++ b/pkgs/servers/varnish/default.nix
@@ -32,7 +32,7 @@ let
       '';
 
       # https://github.com/varnishcache/varnish-cache/issues/1875
-      env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-fexcess-precision=standard";
+      env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isi686 "-fexcess-precision=standard";
 
       outputs = [ "out" "dev" "man" ];
 
diff --git a/pkgs/servers/web-apps/ethercalc/node-packages.nix b/pkgs/servers/web-apps/ethercalc/node-packages.nix
index e9c5ff0e4fee..0a4e2b7c9aba 100644
--- a/pkgs/servers/web-apps/ethercalc/node-packages.nix
+++ b/pkgs/servers/web-apps/ethercalc/node-packages.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../../development/node-packages/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages-generated.nix {
diff --git a/pkgs/servers/web-apps/lemmy/server.nix b/pkgs/servers/web-apps/lemmy/server.nix
index 8cb65bfef2bf..416de2b21db7 100644
--- a/pkgs/servers/web-apps/lemmy/server.nix
+++ b/pkgs/servers/web-apps/lemmy/server.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = pinData.serverCargoHash;
 
   buildInputs = [ postgresql ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv Security SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security SystemConfiguration ];
 
   # Using OPENSSL_NO_VENDOR is not an option on darwin
   # As of version 0.10.35 rust-openssl looks for openssl on darwin
diff --git a/pkgs/servers/web-apps/pict-rs/0.3.nix b/pkgs/servers/web-apps/pict-rs/0.3.nix
index 11f2479efdbe..9e7ad6e3d204 100644
--- a/pkgs/servers/web-apps/pict-rs/0.3.nix
+++ b/pkgs/servers/web-apps/pict-rs/0.3.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
   PROTOC_INCLUDE = "${protobuf}/include";
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     wrapProgram "$out/bin/pict-rs" \
diff --git a/pkgs/servers/web-apps/pict-rs/default.nix b/pkgs/servers/web-apps/pict-rs/default.nix
index 6033db65bf30..fddfd6fffebd 100644
--- a/pkgs/servers/web-apps/pict-rs/default.nix
+++ b/pkgs/servers/web-apps/pict-rs/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
   PROTOC_INCLUDE = "${protobuf}/include";
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
   postInstall = ''
     wrapProgram "$out/bin/pict-rs" \
@@ -40,7 +40,7 @@ rustPlatform.buildRustPackage rec {
   passthru.tests = { inherit (nixosTests) pict-rs; };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Simple image hosting service";
     mainProgram = "pict-rs";
     homepage = "https://git.asonix.dog/asonix/pict-rs";
diff --git a/pkgs/servers/webdav-server-rs/default.nix b/pkgs/servers/webdav-server-rs/default.nix
index ad1084597604..e7e5b6a0edb8 100644
--- a/pkgs/servers/webdav-server-rs/default.nix
+++ b/pkgs/servers/webdav-server-rs/default.nix
@@ -5,7 +5,7 @@
 , libtirpc
 , pam
 , rpcsvc-proto
-, enablePAM ? stdenv.isLinux
+, enablePAM ? stdenv.hostPlatform.isLinux
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index b3eb0e74dc68..ad631e419aae 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -11,7 +11,7 @@
 }:
 
 let
-  inherit (stdenv) isDarwin;
+  inherit (stdenv.hostPlatform) isDarwin;
 
   malloc0ReturnsNullCrossFlag = lib.optional
     (stdenv.hostPlatform != stdenv.buildPlatform)
@@ -87,7 +87,7 @@ self: super:
     x11BuildHook = ./imake.sh;
     patches = [./imake.patch ./imake-cc-wrapper-uberhack.patch];
     setupHook = ./imake-setup-hook.sh;
-    CFLAGS = "-DIMAKE_COMPILETIME_CPP='\"${if stdenv.isDarwin
+    CFLAGS = "-DIMAKE_COMPILETIME_CPP='\"${if stdenv.hostPlatform.isDarwin
       then "${tradcpp}/bin/cpp"
       else "gcc"}\"'";
 
@@ -164,7 +164,7 @@ self: super:
       # Remove useless DocBook XML files.
       rm -rf $out/share/doc
     '';
-    CPP = lib.optionalString stdenv.isDarwin "clang -E -";
+    CPP = lib.optionalString stdenv.hostPlatform.isDarwin "clang -E -";
     propagatedBuildInputs = attrs.propagatedBuildInputs or [] ++ [ xorg.xorgproto ];
   });
 
@@ -263,7 +263,7 @@ self: super:
       ++ lib.optional (stdenv.targetPlatform.useLLVM or false) "ac_cv_path_RAWCPP=cpp";
     propagatedBuildInputs = attrs.propagatedBuildInputs or [] ++ [ xorg.libSM ];
     depsBuildBuild = [ buildPackages.stdenv.cc ];
-    CPP = if stdenv.isDarwin then "clang -E -" else "${stdenv.cc.targetPrefix}cc -E -";
+    CPP = if stdenv.hostPlatform.isDarwin then "clang -E -" else "${stdenv.cc.targetPrefix}cc -E -";
     outputDoc = "devdoc";
     outputs = [ "out" "dev" "devdoc" ];
   });
@@ -794,7 +794,7 @@ self: super:
           ./dont-create-logdir-during-build.patch
         ];
         buildInputs = commonBuildInputs ++ [ libdrm mesa ];
-        propagatedBuildInputs = attrs.propagatedBuildInputs or [] ++ [ xorg.libpciaccess ] ++ commonPropagatedBuildInputs ++ lib.optionals stdenv.isLinux [
+        propagatedBuildInputs = attrs.propagatedBuildInputs or [] ++ [ xorg.libpciaccess ] ++ commonPropagatedBuildInputs ++ lib.optionals stdenv.hostPlatform.isLinux [
           udev
         ];
         depsBuildBuild = [ buildPackages.stdenv.cc ];
@@ -926,7 +926,7 @@ self: super:
       "--with-xkb-bin-directory=${xorg.xkbcomp}/bin"
       "--with-xkb-path=${xorg.xkeyboardconfig}/share/X11/xkb"
       "--with-xkb-output=$out/share/X11/xkb/compiled"
-    ] ++ lib.optional stdenv.isDarwin [
+    ] ++ lib.optional stdenv.hostPlatform.isDarwin [
       "--without-dtrace"
     ];
 
@@ -935,7 +935,7 @@ self: super:
       xorg.libXfont2
       xorg.xtrans
       xorg.libxcvt
-    ] ++ lib.optional stdenv.isDarwin [ Xplugin ];
+    ] ++ lib.optional stdenv.hostPlatform.isDarwin [ Xplugin ];
   });
 
   lndir = super.lndir.overrideAttrs (attrs: {
@@ -1083,7 +1083,7 @@ self: super:
   xmore = addMainProgram super.xmore { };
 
   xorgcffiles = super.xorgcffiles.overrideAttrs (attrs: {
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace $out/lib/X11/config/darwin.cf --replace "/usr/bin/" ""
     '';
   });
diff --git a/pkgs/shells/bash/5.nix b/pkgs/shells/bash/5.nix
index 614b3c377ea2..91da1f05a528 100644
--- a/pkgs/shells/bash/5.nix
+++ b/pkgs/shells/bash/5.nix
@@ -7,7 +7,7 @@
 , util-linux
 
   # patch for cygwin requires readline support
-, interactive ? stdenv.isCygwin
+, interactive ? stdenv.hostPlatform.isCygwin
 , readline
 , withDocs ? false
 , texinfo
diff --git a/pkgs/shells/bash/bash-completion/default.nix b/pkgs/shells/bash/bash-completion/default.nix
index 9e65dcd7c289..6408f0610ff6 100644
--- a/pkgs/shells/bash/bash-completion/default.nix
+++ b/pkgs/shells/bash/bash-completion/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
       --ignore=test/t/test_screen.py
   '';
 
-  prePatch = lib.optionalString stdenv.isDarwin ''
+  prePatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i -e 's/readlink -f/readlink/g' bash_completion completions/*
   '';
 
diff --git a/pkgs/shells/fish/default.nix b/pkgs/shells/fish/default.nix
index 73065cb380fd..82ba76c005b8 100644
--- a/pkgs/shells/fish/default.nix
+++ b/pkgs/shells/fish/default.nix
@@ -177,7 +177,7 @@ let
 
       # tests/checks/complete.fish
       sed -i 's|/bin/ls|${coreutils}/bin/ls|' tests/checks/complete.fish
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Tests use pkill/pgrep which are currently not built on Darwin
       # See https://github.com/NixOS/nixpkgs/pull/103180
       rm tests/pexpects/exit.py
@@ -187,7 +187,7 @@ let
       # pexpect tests are flaky in general
       # See https://github.com/fish-shell/fish-shell/issues/8789
       rm tests/pexpects/bind.py
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       # pexpect tests are flaky on aarch64-linux (also x86_64-linux)
       # See https://github.com/fish-shell/fish-shell/issues/8789
       rm tests/pexpects/exit_handlers.py
@@ -208,12 +208,12 @@ let
 
     cmakeFlags = [
       "-DCMAKE_INSTALL_DOCDIR=${placeholder "doc"}/share/doc/fish"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-DMAC_CODESIGN_ID=OFF"
     ];
 
     # Fish’s test suite needs to be able to look up process information and send signals.
-    sandboxProfile = lib.optionalString stdenv.isDarwin ''
+    sandboxProfile = lib.optionalString stdenv.hostPlatform.isDarwin ''
       (allow mach-lookup mach-task-name)
       (allow signal (target children))
     '';
@@ -235,7 +235,7 @@ let
       gnused
       groff
       gettext
-    ] ++ lib.optional (!stdenv.isDarwin) man-db;
+    ] ++ lib.optional (!stdenv.hostPlatform.isDarwin) man-db;
 
     doCheck = true;
 
@@ -278,13 +278,13 @@ let
       end
       EOF
 
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       for cur in $out/share/fish/functions/*.fish; do
         sed -e "s|/usr/bin/getent|${getent}/bin/getent|" \
             -i "$cur"
       done
 
-    '' + lib.optionalString (!stdenv.isDarwin) ''
+    '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       sed -i "s|Popen(\['manpath'|Popen(\['${man-db}/bin/manpath'|" \
               "$out/share/fish/tools/create_manpage_completions.py"
       sed -i "s|command manpath|command ${man-db}/bin/manpath|"     \
@@ -308,7 +308,7 @@ let
     passthru = {
       shellPath = "/bin/fish";
       tests = {
-        nixos = lib.optionalAttrs stdenv.isLinux nixosTests.fish;
+        nixos = lib.optionalAttrs stdenv.hostPlatform.isLinux nixosTests.fish;
 
         # Test the fish_config tool by checking the generated splash page.
         # Since the webserver requires a port to run, it is not started.
diff --git a/pkgs/shells/fish/plugins/fzf-fish.nix b/pkgs/shells/fish/plugins/fzf-fish.nix
index 3a70c888c352..1ad4764c46c5 100644
--- a/pkgs/shells/fish/plugins/fzf-fish.nix
+++ b/pkgs/shells/fish/plugins/fzf-fish.nix
@@ -31,7 +31,7 @@ buildFishPlugin rec {
     # Disable tests that are failing, because there is not 'rev' command
     rm tests/preview_file/custom_file_preview.fish
   '' + (
-    if stdenv.isDarwin then ''script /dev/null fish -c "fishtape tests/*/*.fish"''
+    if stdenv.hostPlatform.isDarwin then ''script /dev/null fish -c "fishtape tests/*/*.fish"''
     else ''script -c 'fish -c "fishtape tests/*/*.fish"' ''
   );
 
diff --git a/pkgs/shells/ion/default.nix b/pkgs/shells/ion/default.nix
index 0440a79e760f..a5e7f9edeb9a 100644
--- a/pkgs/shells/ion/default.nix
+++ b/pkgs/shells/ion/default.nix
@@ -34,11 +34,11 @@ rustPlatform.buildRustPackage rec {
     ./build-script.patch
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     # test assumes linux
     "--skip=binary::completer::tests::filename_completion"
   ];
diff --git a/pkgs/shells/nushell/default.nix b/pkgs/shells/nushell/default.nix
index b763526dda60..ef0edeb6a24c 100644
--- a/pkgs/shells/nushell/default.nix
+++ b/pkgs/shells/nushell/default.nix
@@ -38,18 +38,18 @@ rustPlatform.buildRustPackage {
   cargoHash = "sha256-43V0TnYGG2tyWRIGaohIaoN7dxnY1fle2Bp5lDiFlWg=";
 
   nativeBuildInputs = [ pkg-config ]
-    ++ lib.optionals (withDefaultFeatures && stdenv.isLinux) [ python3 ]
-    ++ lib.optionals stdenv.isDarwin [ rustPlatform.bindgenHook ];
+    ++ lib.optionals (withDefaultFeatures && stdenv.hostPlatform.isLinux) [ python3 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ rustPlatform.bindgenHook ];
 
   buildInputs = [ openssl zstd ]
-    ++ lib.optionals stdenv.isDarwin [ zlib Libsystem Security ]
-    ++ lib.optionals (withDefaultFeatures && stdenv.isLinux) [ xorg.libX11 ]
-    ++ lib.optionals (withDefaultFeatures && stdenv.isDarwin) [ AppKit nghttp2 libgit2 ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ zlib Libsystem Security ]
+    ++ lib.optionals (withDefaultFeatures && stdenv.hostPlatform.isLinux) [ xorg.libX11 ]
+    ++ lib.optionals (withDefaultFeatures && stdenv.hostPlatform.isDarwin) [ AppKit nghttp2 libgit2 ];
 
   buildNoDefaultFeatures = !withDefaultFeatures;
   buildFeatures = additionalFeatures [ ];
 
-  doCheck = ! stdenv.isDarwin; # Skip checks on darwin. Failing tests since 0.96.0
+  doCheck = ! stdenv.hostPlatform.isDarwin; # Skip checks on darwin. Failing tests since 0.96.0
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/shells/nushell/plugins/formats.nix b/pkgs/shells/nushell/plugins/formats.nix
index a74721ad9031..7d693118ac01 100644
--- a/pkgs/shells/nushell/plugins/formats.nix
+++ b/pkgs/shells/nushell/plugins/formats.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-Lcgf6+Li1STl4Sko81oBHAnX09A6F7dwYmHJiF2CZ3s=";
 
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     IOKit
     Foundation
   ];
diff --git a/pkgs/shells/nushell/plugins/gstat.nix b/pkgs/shells/nushell/plugins/gstat.nix
index e430820247dc..06a2fb38d926 100644
--- a/pkgs/shells/nushell/plugins/gstat.nix
+++ b/pkgs/shells/nushell/plugins/gstat.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-NLGEaIGUqgyGegzVyZloLckVGYmfMjwhzVXh327kxRA=";
 
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
   cargoBuildFlags = [ "--package nu_plugin_gstat" ];
 
   checkPhase = ''
diff --git a/pkgs/shells/nushell/plugins/net.nix b/pkgs/shells/nushell/plugins/net.nix
index 95d1c36b467f..981f1d208e11 100644
--- a/pkgs/shells/nushell/plugins/net.nix
+++ b/pkgs/shells/nushell/plugins/net.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ rustPlatform.bindgenHook ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
     IOKit
   ];
diff --git a/pkgs/shells/nushell/plugins/polars.nix b/pkgs/shells/nushell/plugins/polars.nix
index 7e9e1623bea6..5865af7139fd 100644
--- a/pkgs/shells/nushell/plugins/polars.nix
+++ b/pkgs/shells/nushell/plugins/polars.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       IOKit
       Foundation
     ];
diff --git a/pkgs/shells/nushell/plugins/query.nix b/pkgs/shells/nushell/plugins/query.nix
index 85520b32e0e3..55bd221c8b54 100644
--- a/pkgs/shells/nushell/plugins/query.nix
+++ b/pkgs/shells/nushell/plugins/query.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage {
       openssl
       curl
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       IOKit
       CoreFoundation
     ];
diff --git a/pkgs/shells/powershell/default.nix b/pkgs/shells/powershell/default.nix
index c6d123701589..a29bb9c99010 100644
--- a/pkgs/shells/powershell/default.nix
+++ b/pkgs/shells/powershell/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     less
     makeWrapper
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     autoPatchelfHook
   ];
 
@@ -51,9 +51,9 @@ stdenv.mkDerivation rec {
     libuuid
     libunwind
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.Libsystem
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     lttng-ust
     pam
   ];
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
       --set POWERSHELL_TELEMETRY_OPTOUT 1 \
       --set DOTNET_CLI_TELEMETRY_OPTOUT 1
 
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --replace-needed liblttng-ust${ext}.0 liblttng-ust${ext}.1 $out/share/powershell/libcoreclrtraceptprovider.so
 
   '' + ''
diff --git a/pkgs/shells/rush/default.nix b/pkgs/shells/rush/default.nix
index 6e7e256561b6..7b606178973e 100644
--- a/pkgs/shells/rush/default.nix
+++ b/pkgs/shells/rush/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Restricted User Shell";
 
     longDescription =
diff --git a/pkgs/shells/yash/default.nix b/pkgs/shells/yash/default.nix
index a88049ca0147..3e57b7b9a0fb 100644
--- a/pkgs/shells/yash/default.nix
+++ b/pkgs/shells/yash/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   strictDeps = true;
   nativeBuildInputs = [ asciidoc gettext ];
-  buildInputs = [ ncurses ] ++ lib.optionals stdenv.isDarwin [ gettext ];
+  buildInputs = [ ncurses ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ gettext ];
 
   meta = with lib; {
     homepage = "https://yash.osdn.jp/index.html.en";
diff --git a/pkgs/shells/zsh/antibody/default.nix b/pkgs/shells/zsh/antibody/default.nix
index fe32821dd611..7c1f0eb56cbd 100644
--- a/pkgs/shells/zsh/antibody/default.nix
+++ b/pkgs/shells/zsh/antibody/default.nix
@@ -30,6 +30,6 @@ buildGoModule rec {
     #
     # but this package is no longer maintained.
     #
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/shells/zsh/default.nix b/pkgs/shells/zsh/default.nix
index ac8d3aa9a736..0955c9c47fa0 100644
--- a/pkgs/shells/zsh/default.nix
+++ b/pkgs/shells/zsh/default.nix
@@ -49,7 +49,7 @@ stdenv.mkDerivation {
 
   strictDeps = true;
   nativeBuildInputs = [ autoreconfHook perl groff texinfo pkg-config ]
-                      ++ lib.optionals stdenv.isLinux [ util-linux yodl ];
+                      ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linux yodl ];
 
   buildInputs = [ ncurses pcre ];
 
diff --git a/pkgs/shells/zsh/grml-zsh-config/default.nix b/pkgs/shells/zsh/grml-zsh-config/default.nix
index 00349696bd3f..d7b745c63c5f 100644
--- a/pkgs/shells/zsh/grml-zsh-config/default.nix
+++ b/pkgs/shells/zsh/grml-zsh-config/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   strictDeps = true;
   nativeBuildInputs = [ txt2tags ];
   buildInputs = [ zsh coreutils procps ]
-    ++ lib.optional stdenv.isLinux inetutils;
+    ++ lib.optional stdenv.hostPlatform.isLinux inetutils;
 
   buildPhase = ''
     cd doc
diff --git a/pkgs/test/cc-wrapper/default.nix b/pkgs/test/cc-wrapper/default.nix
index 6a0b11a6cc97..3de359d15b4a 100644
--- a/pkgs/test/cc-wrapper/default.nix
+++ b/pkgs/test/cc-wrapper/default.nix
@@ -3,9 +3,9 @@
 let
   # Sanitizers are not supported on Darwin.
   # Sanitizer headers aren't available in older libc++ stdenvs due to a bug
-  sanitizersWorking = (stdenv.buildPlatform == stdenv.hostPlatform) && !stdenv.isDarwin && !stdenv.hostPlatform.isMusl && (
+  sanitizersWorking = (stdenv.buildPlatform == stdenv.hostPlatform) && !stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isMusl && (
     (stdenv.cc.isClang && lib.versionAtLeast (lib.getVersion stdenv.cc.name) "5.0.0")
-    || (stdenv.cc.isGNU && stdenv.isLinux)
+    || (stdenv.cc.isGNU && stdenv.hostPlatform.isLinux)
   );
   staticLibc = lib.optionalString (stdenv.hostPlatform.libc == "glibc") "-L ${glibc.static}/lib";
   emulator = stdenv.hostPlatform.emulator buildPackages;
@@ -57,7 +57,7 @@ in stdenv.mkDerivation {
       rm cxx-main{,-static,.o}
     ''}
 
-    ${lib.optionalString (stdenv.isDarwin && stdenv.cc.isClang) ''
+    ${lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.cc.isClang) ''
       echo "checking whether compiler can build with CoreFoundation.framework... " >&2
       mkdir -p foo/lib
       $CC -framework CoreFoundation -o core-foundation-check ${./core-foundation-main.c}
@@ -65,7 +65,7 @@ in stdenv.mkDerivation {
     ''}
 
 
-    ${lib.optionalString (!stdenv.isDarwin) ''
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       echo "checking whether compiler builds valid static C binaries... " >&2
       $CC ${staticLibc} -static -o cc-static ${./cc-main.c}
       ${emulator} ./cc-static
@@ -106,7 +106,7 @@ in stdenv.mkDerivation {
     echo "checking whether compiler uses NIX_LDFLAGS... " >&2
     mkdir -p foo/lib
     $CC -shared \
-      ${lib.optionalString stdenv.isDarwin "-Wl,-install_name,@rpath/libfoo.dylib"} \
+      ${lib.optionalString stdenv.hostPlatform.isDarwin "-Wl,-install_name,@rpath/libfoo.dylib"} \
       -DVALUE=42 \
       -o foo/lib/libfoo${stdenv.hostPlatform.extensions.sharedLibrary} \
       ${./foo.c}
diff --git a/pkgs/test/default.nix b/pkgs/test/default.nix
index 0a9df68ecc95..adb112fd3668 100644
--- a/pkgs/test/default.nix
+++ b/pkgs/test/default.nix
@@ -167,7 +167,7 @@ with pkgs;
     makeBinaryWrapper = pkgs.makeBinaryWrapper.override {
       # Enable sanitizers in the tests only, to avoid the performance cost in regular usage.
       # The sanitizers cause errors on aarch64-darwin, see https://github.com/NixOS/nixpkgs/pull/150079#issuecomment-994132734
-      sanitizers = pkgs.lib.optionals (! (pkgs.stdenv.isDarwin && pkgs.stdenv.isAarch64))
+      sanitizers = pkgs.lib.optionals (! (pkgs.stdenv.hostPlatform.isDarwin && pkgs.stdenv.hostPlatform.isAarch64))
         [ "undefined" "address" ];
     };
   };
diff --git a/pkgs/test/make-binary-wrapper/default.nix b/pkgs/test/make-binary-wrapper/default.nix
index 0d699900cf6d..29e4272fd672 100644
--- a/pkgs/test/make-binary-wrapper/default.nix
+++ b/pkgs/test/make-binary-wrapper/default.nix
@@ -60,7 +60,7 @@ let
     "overlength-strings"
     "prefix"
     "suffix"
-  ] makeGoldenTest // lib.optionalAttrs (! stdenv.isDarwin) {
+  ] makeGoldenTest // lib.optionalAttrs (! stdenv.hostPlatform.isDarwin) {
     cross = pkgsCross.${if stdenv.buildPlatform.isAarch64 then "gnu64" else "aarch64-multiplatform"}.callPackage ./cross.nix { };
   };
 in
diff --git a/pkgs/test/release/default.nix b/pkgs/test/release/default.nix
index 19ff08b6f9a1..2fdc6d0dc38c 100644
--- a/pkgs/test/release/default.nix
+++ b/pkgs/test/release/default.nix
@@ -13,7 +13,7 @@ pkgs.runCommand "all-attrs-eval-under-tryEval" {
   nativeBuildInputs = [
     nix
     pkgs.gitMinimal
-  ] ++ lib.optional pkgs.stdenv.isLinux pkgs.inotify-tools;
+  ] ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.inotify-tools;
   strictDeps = true;
 
   src = with lib.fileset; toSource {
diff --git a/pkgs/test/stdenv-inputs/default.nix b/pkgs/test/stdenv-inputs/default.nix
index 6a2e441d0191..deb97b822423 100644
--- a/pkgs/test/stdenv-inputs/default.nix
+++ b/pkgs/test/stdenv-inputs/default.nix
@@ -12,7 +12,7 @@ let
       chmod +x $out/bin/foo
       cp ${./foo.c} $out/include/foo.h
       $CC -shared \
-        ${lib.optionalString stdenv.isDarwin "-Wl,-install_name,$out/lib/libfoo.dylib"} \
+        ${lib.optionalString stdenv.hostPlatform.isDarwin "-Wl,-install_name,$out/lib/libfoo.dylib"} \
         -o $out/lib/libfoo${stdenv.hostPlatform.extensions.sharedLibrary} \
         ${./foo.c}
     '';
@@ -30,7 +30,7 @@ let
       chmod +x $out/bin/bar
       cp ${./bar.c} $dev/include/bar.h
       $CC -shared \
-        ${lib.optionalString stdenv.isDarwin "-Wl,-install_name,$dev/lib/libbar.dylib"} \
+        ${lib.optionalString stdenv.hostPlatform.isDarwin "-Wl,-install_name,$dev/lib/libbar.dylib"} \
         -o $dev/lib/libbar${stdenv.hostPlatform.extensions.sharedLibrary} \
         ${./bar.c}
     '';
diff --git a/pkgs/test/stdenv/default.nix b/pkgs/test/stdenv/default.nix
index 6ed430f5da3f..a916e9b65a34 100644
--- a/pkgs/test/stdenv/default.nix
+++ b/pkgs/test/stdenv/default.nix
@@ -168,7 +168,7 @@ in
 
 {
   # Disable on Darwin due to assumptions with __bootPackages
-  __attrsFailEvaluation = stdenv.isDarwin;
+  __attrsFailEvaluation = stdenv.hostPlatform.isDarwin;
 
   # tests for hooks in `stdenv.defaultNativeBuildInputs`
   hooks = lib.recurseIntoAttrs (import ./hooks.nix { stdenv = bootStdenv; pkgs = earlyPkgs; inherit lib; });
diff --git a/pkgs/test/texlive/default.nix b/pkgs/test/texlive/default.nix
index c142623233ac..f9e0bc51e3d4 100644
--- a/pkgs/test/texlive/default.nix
+++ b/pkgs/test/texlive/default.nix
@@ -375,7 +375,7 @@ rec {
 
         # 'Error initialising QuantumRenderer: no suitable pipeline found'
         "tlcockpit"
-      ] ++ lib.optional stdenv.isDarwin "epspdftk";  # wish shebang is a script, not a binary!
+      ] ++ lib.optional stdenv.hostPlatform.isDarwin "epspdftk";  # wish shebang is a script, not a binary!
 
       # (1) binaries requiring -v
       shortVersion = [ "devnag" "diadia" "pmxchords" "ptex2pdf" "simpdftex" "ttf2afm" ];
diff --git a/pkgs/tools/X11/inputplug/default.nix b/pkgs/tools/X11/inputplug/default.nix
index 5d756844e375..c14ff710d4a7 100644
--- a/pkgs/tools/X11/inputplug/default.nix
+++ b/pkgs/tools/X11/inputplug/default.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mit;
     platforms = platforms.unix;
     # `daemon(3)` is deprecated on macOS and `pidfile-rs` needs updating
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ jecaro ];
     mainProgram = "inputplug";
   };
diff --git a/pkgs/tools/X11/xidlehook/default.nix b/pkgs/tools/X11/xidlehook/default.nix
index 80407564a2aa..6c7aa89e01d3 100644
--- a/pkgs/tools/X11/xidlehook/default.nix
+++ b/pkgs/tools/X11/xidlehook/default.nix
@@ -26,13 +26,13 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-uroO0PgnCkFRNYAZgdTZWgDDbBqq1ZM+dni/A2Qw9fg=";
 
-  buildInputs = [ xorg.libX11 xorg.libXScrnSaver libpulseaudio ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ xorg.libX11 xorg.libXScrnSaver libpulseaudio ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
   nativeBuildInputs = [ pkg-config patchelf python3 ];
 
-  buildNoDefaultFeatures = !stdenv.isLinux;
-  buildFeatures = lib.optional (!stdenv.isLinux) "pulse";
+  buildNoDefaultFeatures = !stdenv.hostPlatform.isLinux;
+  buildFeatures = lib.optional (!stdenv.hostPlatform.isLinux) "pulse";
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     RPATH="$(patchelf --print-rpath $out/bin/xidlehook)"
     patchelf --set-rpath "$RPATH:${libpulseaudio}/lib" $out/bin/xidlehook
   '';
diff --git a/pkgs/tools/X11/xpra/default.nix b/pkgs/tools/X11/xpra/default.nix
index 625dde8f825c..fe3f4ba0f4fb 100644
--- a/pkgs/tools/X11/xpra/default.nix
+++ b/pkgs/tools/X11/xpra/default.nix
@@ -88,7 +88,7 @@ in buildPythonApplication rec {
     ./fix-122159.patch # https://github.com/NixOS/nixpkgs/issues/122159
   ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace xpra/platform/posix/features.py \
       --replace-fail "/usr/bin/xdg-open" "${xdg-utils}/bin/xdg-open"
   '';
diff --git a/pkgs/tools/admin/acme-sh/default.nix b/pkgs/tools/admin/acme-sh/default.nix
index e7fbb962c831..b0e0d79d27b7 100644
--- a/pkgs/tools/admin/acme-sh/default.nix
+++ b/pkgs/tools/admin/acme-sh/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
       gnused
       openssl
       socat
-      (if stdenv.isLinux then iproute2 else unixtools.netstat)
+      (if stdenv.hostPlatform.isLinux then iproute2 else unixtools.netstat)
     ];
   in
     ''
diff --git a/pkgs/tools/admin/balena-cli/default.nix b/pkgs/tools/admin/balena-cli/default.nix
index 936cfaec1e98..ed945be9fc7f 100644
--- a/pkgs/tools/admin/balena-cli/default.nix
+++ b/pkgs/tools/admin/balena-cli/default.nix
@@ -15,7 +15,7 @@
 let
   # Fix for: https://github.com/NixOS/nixpkgs/issues/272156
   buildNpmPackage' = buildNpmPackage.override {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 in buildNpmPackage' rec {
   pname = "balena-cli";
@@ -38,13 +38,13 @@ in buildNpmPackage' rec {
   nativeBuildInputs = [
     node-gyp
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     udev
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
     darwin.apple_sdk.frameworks.Cocoa
   ];
diff --git a/pkgs/tools/admin/coldsnap/default.nix b/pkgs/tools/admin/coldsnap/default.nix
index b2825ce7d5a8..23360dc7f726 100644
--- a/pkgs/tools/admin/coldsnap/default.nix
+++ b/pkgs/tools/admin/coldsnap/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   };
   cargoHash = "sha256-ngkoxybl52zTH4wo+sIUtU8vtzOAp+jU1RyTO2KbCgU=";
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
   nativeBuildInputs = [ pkg-config ];
 
   meta = with lib; {
diff --git a/pkgs/tools/admin/docker-credential-helpers/default.nix b/pkgs/tools/admin/docker-credential-helpers/default.nix
index f9e90afb272a..54de6d17e36e 100644
--- a/pkgs/tools/admin/docker-credential-helpers/default.nix
+++ b/pkgs/tools/admin/docker-credential-helpers/default.nix
@@ -13,9 +13,9 @@ buildGoModule rec {
 
   vendorHash = null;
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ libsecret ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libsecret ];
 
   ldflags = [
     "-s"
@@ -25,7 +25,7 @@ buildGoModule rec {
 
   buildPhase =
     let
-      cmds = if stdenv.isDarwin then [ "osxkeychain" "pass" ] else [ "secretservice" "pass" ];
+      cmds = if stdenv.hostPlatform.isDarwin then [ "osxkeychain" "pass" ] else [ "secretservice" "pass" ];
     in
     ''
       for cmd in ${builtins.toString cmds}; do
@@ -47,7 +47,7 @@ buildGoModule rec {
     homepage = "https://github.com/docker/docker-credential-helpers";
     license = licenses.mit;
     maintainers = [ ];
-  } // lib.optionalAttrs stdenv.isDarwin {
+  } // lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     mainProgram = "docker-credential-osxkeychain";
   };
 }
diff --git a/pkgs/tools/admin/google-cloud-sdk/components.nix b/pkgs/tools/admin/google-cloud-sdk/components.nix
index f63b5049e201..c337112762b6 100644
--- a/pkgs/tools/admin/google-cloud-sdk/components.nix
+++ b/pkgs/tools/admin/google-cloud-sdk/components.nix
@@ -164,7 +164,7 @@ let
       nativeBuildInputs = [
         python3
         stdenv.cc.cc
-      ] ++ lib.optionals stdenv.isLinux [
+      ] ++ lib.optionals stdenv.hostPlatform.isLinux [
         autoPatchelfHook
       ];
       buildInputs = [
diff --git a/pkgs/tools/admin/gtk-vnc/default.nix b/pkgs/tools/admin/gtk-vnc/default.nix
index 704bdf84e07c..6ffed3604c64 100644
--- a/pkgs/tools/admin/gtk-vnc/default.nix
+++ b/pkgs/tools/admin/gtk-vnc/default.nix
@@ -9,7 +9,7 @@
 , glib
 , pkg-config
 , cyrus_sasl
-, pulseaudioSupport ? stdenv.isLinux
+, pulseaudioSupport ? stdenv.hostPlatform.isLinux
 , libpulseaudio
 , libgcrypt
 , gtk3
diff --git a/pkgs/tools/admin/netbox2netshot/default.nix b/pkgs/tools/admin/netbox2netshot/default.nix
index 82f2825bcdea..0b5e1ed73793 100644
--- a/pkgs/tools/admin/netbox2netshot/default.nix
+++ b/pkgs/tools/admin/netbox2netshot/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/tools/admin/pgadmin/default.nix b/pkgs/tools/admin/pgadmin/default.nix
index 4325040dd683..37725ad4b9d0 100644
--- a/pkgs/tools/admin/pgadmin/default.nix
+++ b/pkgs/tools/admin/pgadmin/default.nix
@@ -39,7 +39,7 @@ let
   # skip tests on macOS which fail due to an error in keyring, see https://github.com/NixOS/nixpkgs/issues/281214
   skippedTests = builtins.concatStringsSep "," (
     [ "browser.tests.test_kerberos_with_mocking" ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "browser.server_groups.servers.tests.test_all_server_get"
       "browser.server_groups.servers.tests.test_check_connect"
       "browser.server_groups.servers.tests.test_check_ssh_mock_connect"
diff --git a/pkgs/tools/admin/procs/default.nix b/pkgs/tools/admin/procs/default.nix
index d4071186f988..4e574e407e2e 100644
--- a/pkgs/tools/admin/procs/default.nix
+++ b/pkgs/tools/admin/procs/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-EifER0wt2Nw7WrlVwc49tZHH/av4OkzTPYSzl9mVJI8=";
 
   nativeBuildInputs = [ installShellFiles ]
-    ++ lib.optionals stdenv.isDarwin [ rustPlatform.bindgenHook ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ rustPlatform.bindgenHook ];
 
   postInstall = ''
     for shell in bash fish zsh; do
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     installShellCompletion procs.{bash,fish} --zsh _procs
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security libiconv Libsystem ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security libiconv Libsystem ];
 
   meta = with lib; {
     description = "Modern replacement for ps written in Rust";
diff --git a/pkgs/tools/admin/pulumi-bin/default.nix b/pkgs/tools/admin/pulumi-bin/default.nix
index 25351db6fd3f..ec61e5aef2d0 100644
--- a/pkgs/tools/admin/pulumi-bin/default.nix
+++ b/pkgs/tools/admin/pulumi-bin/default.nix
@@ -14,7 +14,7 @@ in stdenv.mkDerivation {
 
   installPhase = ''
     install -D -t $out/bin/ *
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/pulumi --set LD_LIBRARY_PATH "${stdenv.cc.cc.lib}/lib"
   '' + ''
     installShellCompletion --cmd pulumi \
@@ -23,7 +23,7 @@ in stdenv.mkDerivation {
       --zsh  <($out/bin/pulumi completion zsh)
   '';
 
-  nativeBuildInputs = [ installShellFiles ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook makeWrapper ];
+  nativeBuildInputs = [ installShellFiles ] ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook makeWrapper ];
   buildInputs = [ stdenv.cc.cc.libgcc or null ];
 
   meta = with lib; {
diff --git a/pkgs/tools/admin/pulumi/default.nix b/pkgs/tools/admin/pulumi/default.nix
index 9d715ea7edf9..e79000e70217 100644
--- a/pkgs/tools/admin/pulumi/default.nix
+++ b/pkgs/tools/admin/pulumi/default.nix
@@ -74,7 +74,7 @@ buildGoModule rec {
     rm codegen/{docs,dotnet,go,nodejs,python,schema}/*_test.go
     rm -R codegen/{dotnet,go,nodejs,python}/gen_program_test
 
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export PULUMI_HOME=$(mktemp -d)
   '';
 
diff --git a/pkgs/tools/admin/tigervnc/default.nix b/pkgs/tools/admin/tigervnc/default.nix
index e1a10334f45b..c54ce8bfe142 100644
--- a/pkgs/tools/admin/tigervnc/default.nix
+++ b/pkgs/tools/admin/tigervnc/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-TgVV/4MRsQHYKpDf9L5eHMLVpdwvNy1KPDIe7xMlQ9o=";
   };
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     sed -i -e '/^\$cmd \.= " -pn";/a$cmd .= " -xkbdir ${xkeyboard_config}/etc/X11/xkb";' unix/vncserver/vncserver.in
     fontPath=
     substituteInPlace vncviewer/vncviewer.cxx \
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     "-Wno-error=array-bounds"
   ];
 
-  postBuild = lib.optionalString stdenv.isLinux ''
+  postBuild = lib.optionalString stdenv.hostPlatform.isLinux ''
     export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -Wno-error=int-to-pointer-cast -Wno-error=pointer-to-int-cast"
     export CXXFLAGS="$CXXFLAGS -fpermissive"
     # Build Xvnc
@@ -84,11 +84,11 @@ stdenv.mkDerivation rec {
         --with-xkb-output=$out/share/X11/xkb/compiled
     make TIGERVNC_SRC=$src TIGERVNC_BUILDDIR=`pwd`/../.. -j$NIX_BUILD_CORES
     popd
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     make dmg
   '';
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     pushd unix/xserver/hw/vnc
     make TIGERVNC_SRC=$src TIGERVNC_BUILDDIR=`pwd`/../../../.. install
     popd
@@ -96,7 +96,7 @@ stdenv.mkDerivation rec {
 
     wrapProgram $out/bin/vncserver \
       --prefix PATH : ${lib.makeBinPath (with xorg; [ xterm twm xsetroot xauth ]) }
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv 'TigerVNC Viewer ${version}.app' $out/Applications/
     rm $out/bin/vncviewer
@@ -111,7 +111,7 @@ stdenv.mkDerivation rec {
     libjpeg_turbo
     pixman
     gawk
-  ] ++ lib.optionals stdenv.isLinux (with xorg; [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux (with xorg; [
     nettle
     pam
     perl
@@ -137,7 +137,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     cmake
     gettext
-  ] ++ lib.optionals stdenv.isLinux (with xorg; [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux (with xorg; [
     fontutil
     libtool
     makeWrapper
@@ -145,7 +145,7 @@ stdenv.mkDerivation rec {
     zlib
   ] ++ xorg.xorgserver.nativeBuildInputs);
 
-  propagatedBuildInputs = lib.optional stdenv.isLinux xorg.xorgserver.propagatedBuildInputs;
+  propagatedBuildInputs = lib.optional stdenv.hostPlatform.isLinux xorg.xorgserver.propagatedBuildInputs;
 
   passthru.tests.tigervnc = nixosTests.tigervnc;
 
diff --git a/pkgs/tools/admin/trinsic-cli/default.nix b/pkgs/tools/admin/trinsic-cli/default.nix
index 547d3020620a..afa431ecd76f 100644
--- a/pkgs/tools/admin/trinsic-cli/default.nix
+++ b/pkgs/tools/admin/trinsic-cli/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
   cargoVendorDir = "vendor";
   doCheck = false;
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Trinsic CLI";
diff --git a/pkgs/tools/admin/uacme/default.nix b/pkgs/tools/admin/uacme/default.nix
index 6bf1d55e4375..659ca720856b 100644
--- a/pkgs/tools/admin/uacme/default.nix
+++ b/pkgs/tools/admin/uacme/default.nix
@@ -39,6 +39,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ malte-v ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/archivers/7zz/default.nix b/pkgs/tools/archivers/7zz/default.nix
index 74746fa5f1f3..8a0b1365ee2d 100644
--- a/pkgs/tools/archivers/7zz/default.nix
+++ b/pkgs/tools/archivers/7zz/default.nix
@@ -4,7 +4,7 @@
 
   # Only used for Linux's x86/x86_64
 , uasm
-, useUasm ? (stdenv.isLinux && stdenv.hostPlatform.isx86)
+, useUasm ? (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86)
 
   # RAR code is under non-free unRAR license
   # see the meta.license section below for more details
@@ -52,7 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
       --replace windres.exe ${stdenv.cc.targetPrefix}windres
   '';
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-deprecated-copy-dtor"
   ] ++ lib.optionals stdenv.hostPlatform.isMinGW [
     "-Wno-conversion"
@@ -80,7 +80,7 @@ stdenv.mkDerivation (finalAttrs: {
     # We need at minimum 10.13 here because of utimensat, however since
     # we need a bump anyway, let's set the same minimum version as the one in
     # aarch64-darwin so we don't need additional changes for it
-    ++ lib.optionals stdenv.isDarwin [ "MACOSX_DEPLOYMENT_TARGET=10.16" ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "MACOSX_DEPLOYMENT_TARGET=10.16" ]
     # it's the compression code with the restriction, see DOC/License.txt
     ++ lib.optionals (!enableUnfree) [ "DISABLE_RAR_COMPRESS=true" ]
     ++ lib.optionals (stdenv.hostPlatform.isMinGW) [ "IS_MINGW=1" "MSYSTEM=1" ];
diff --git a/pkgs/tools/archivers/arc_unpacker/default.nix b/pkgs/tools/archivers/arc_unpacker/default.nix
index 057efacdbe76..24a1d01b64da 100644
--- a/pkgs/tools/archivers/arc_unpacker/default.nix
+++ b/pkgs/tools/archivers/arc_unpacker/default.nix
@@ -82,7 +82,7 @@ stdenv.mkDerivation {
   '';
 
   # A few tests fail on aarch64-linux
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   meta = with lib; {
     description = "Tool to extract files from visual novel archives";
@@ -93,6 +93,6 @@ stdenv.mkDerivation {
     mainProgram = "arc_unpacker";
 
     # unit test failures
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/tools/archivers/arj/default.nix b/pkgs/tools/archivers/arj/default.nix
index 6f365e226e20..5ec946788d92 100644
--- a/pkgs/tools/archivers/arj/default.nix
+++ b/pkgs/tools/archivers/arj/default.nix
@@ -128,7 +128,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace environ.c \
         --replace "  #include <sys/statfs.h>" "  #include <sys/mount.h>"
   '';
diff --git a/pkgs/tools/archivers/cpio/default.nix b/pkgs/tools/archivers/cpio/default.nix
index 04c0300944eb..ba178fb3eb7e 100644
--- a/pkgs/tools/archivers/cpio/default.nix
+++ b/pkgs/tools/archivers/cpio/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   separateDebugInfo = true;
 
-  preConfigure = lib.optionalString stdenv.isCygwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isCygwin ''
     sed -i gnu/fpending.h -e 's,include <stdio_ext.h>,,'
   '';
 
diff --git a/pkgs/tools/archivers/gbl/default.nix b/pkgs/tools/archivers/gbl/default.nix
index f025a0c578c1..6bbc31a6b1c6 100644
--- a/pkgs/tools/archivers/gbl/default.nix
+++ b/pkgs/tools/archivers/gbl/default.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-CeGLSseKUe2XudRqZm5Y7o7ZLDtDBg/MFunOGqxFZGM=";
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   passthru.tests.version =
     testers.testVersion { package = gbl; };
diff --git a/pkgs/tools/archivers/gnutar/default.nix b/pkgs/tools/archivers/gnutar/default.nix
index 723c6b75ca9f..f9b5415b4f8e 100644
--- a/pkgs/tools/archivers/gnutar/default.nix
+++ b/pkgs/tools/archivers/gnutar/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   };
 
   # avoid retaining reference to CF during stdenv bootstrap
-  configureFlags = lib.optionals stdenv.isDarwin [
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "gt_cv_func_CFPreferencesCopyAppValue=no"
     "gt_cv_func_CFLocaleCopyCurrent=no"
     "gt_cv_func_CFLocaleCopyPreferredLanguages=no"
@@ -27,26 +27,26 @@ stdenv.mkDerivation rec {
   # gnutar tries to call into gettext between `fork` and `exec`,
   # which is not safe on darwin.
   # see http://article.gmane.org/gmane.os.macosx.fink.devel/21882
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/system.c --replace '_(' 'N_('
   '';
 
   outputs = [ "out" "info" ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin autoreconfHook
-    ++ lib.optional (!stdenv.isDarwin) updateAutotoolsGnuConfigScriptsHook;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin autoreconfHook
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) updateAutotoolsGnuConfigScriptsHook;
   # Add libintl on Darwin specifically as it fails to link (or skip)
   # NLS on it's own:
   #  "_libintl_textdomain", referenced from:
   #    _main in tar.o
   #  ld: symbol(s) not found for architecture x86_64
-  buildInputs = lib.optional aclSupport acl ++ lib.optional stdenv.isDarwin libintl;
+  buildInputs = lib.optional aclSupport acl ++ lib.optional stdenv.hostPlatform.isDarwin libintl;
 
   # May have some issues with root compilation because the bootstrap tool
   # cannot be used as a login shell for now.
-  FORCE_UNSAFE_CONFIGURE = lib.optionalString (stdenv.hostPlatform.system == "armv7l-linux" || stdenv.isSunOS) "1";
+  FORCE_UNSAFE_CONFIGURE = lib.optionalString (stdenv.hostPlatform.system == "armv7l-linux" || stdenv.hostPlatform.isSunOS) "1";
 
-  preConfigure = if stdenv.isCygwin then ''
+  preConfigure = if stdenv.hostPlatform.isCygwin then ''
     sed -i gnu/fpending.h -e 's,include <stdio_ext.h>,,'
   '' else null;
 
diff --git a/pkgs/tools/archivers/innoextract/default.nix b/pkgs/tools/archivers/innoextract/default.nix
index 1219c48ab7d2..e2e3ddcdc3e7 100644
--- a/pkgs/tools/archivers/innoextract/default.nix
+++ b/pkgs/tools/archivers/innoextract/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ xz boost ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   # Python is reported as missing during the build, however
   # including Python does not change the output.
diff --git a/pkgs/tools/archivers/p7zip/default.nix b/pkgs/tools/archivers/p7zip/default.nix
index 3ced84bed025..e77904e120d6 100644
--- a/pkgs/tools/archivers/p7zip/default.nix
+++ b/pkgs/tools/archivers/p7zip/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   preConfigure = ''
     buildFlags=all3
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp makefile.macosx_llvm_64bits makefile.machine
   '';
 
diff --git a/pkgs/tools/archivers/pax/default.nix b/pkgs/tools/archivers/pax/default.nix
index feacf73fe87b..42668a4d1d68 100644
--- a/pkgs/tools/archivers/pax/default.nix
+++ b/pkgs/tools/archivers/pax/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "1p18nxijh323f4i1s2pg7pcr0557xljl5avv8ll5s9nfr34r5j0w";
   };
 
-  buildInputs = lib.optional stdenv.isDarwin utmp
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin utmp
     ++ lib.optional stdenv.hostPlatform.isMusl musl-fts;
 
   NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isMusl "-lfts";
diff --git a/pkgs/tools/archivers/rar/default.nix b/pkgs/tools/archivers/rar/default.nix
index cd78e11e80bb..fe378514adea 100644
--- a/pkgs/tools/archivers/rar/default.nix
+++ b/pkgs/tools/archivers/rar/default.nix
@@ -41,10 +41,10 @@ stdenv.mkDerivation {
 
   dontBuild = true;
 
-  buildInputs = lib.optionals stdenv.isLinux [ stdenv.cc.cc.lib ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ stdenv.cc.cc.lib ];
 
   nativeBuildInputs = [ installShellFiles ]
-    ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/tools/archivers/unar/default.nix b/pkgs/tools/archivers/unar/default.nix
index 44a5d4d1192d..96090b88f6b2 100644
--- a/pkgs/tools/archivers/unar/default.nix
+++ b/pkgs/tools/archivers/unar/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   };
 
   postPatch =
-    if stdenv.isDarwin then ''
+    if stdenv.hostPlatform.isDarwin then ''
       substituteInPlace "./XADMaster.xcodeproj/project.pbxproj" \
         --replace "libstdc++.6.dylib" "libc++.1.dylib"
     '' else ''
@@ -43,21 +43,21 @@ stdenv.mkDerivation rec {
     '';
 
   buildInputs = [ bzip2 icu openssl wavpack zlib ] ++
-    lib.optionals stdenv.isLinux [ gnustep.base ] ++
-    lib.optionals stdenv.isDarwin [ Foundation AppKit ];
+    lib.optionals stdenv.hostPlatform.isLinux [ gnustep.base ] ++
+    lib.optionals stdenv.hostPlatform.isDarwin [ Foundation AppKit ];
 
   nativeBuildInputs = [ installShellFiles ] ++
-    lib.optionals stdenv.isLinux [ gnustep.make ] ++
-    lib.optionals stdenv.isDarwin [ xcbuildHook ];
+    lib.optionals stdenv.hostPlatform.isLinux [ gnustep.make ] ++
+    lib.optionals stdenv.hostPlatform.isDarwin [ xcbuildHook ];
 
-  xcbuildFlags = lib.optionals stdenv.isDarwin [
+  xcbuildFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-target unar"
     "-target lsar"
     "-configuration Release"
     "MACOSX_DEPLOYMENT_TARGET=${stdenv.hostPlatform.darwinMinVersion}"
   ];
 
-  makefile = lib.optionalString (!stdenv.isDarwin) "Makefile.linux";
+  makefile = lib.optionalString (!stdenv.hostPlatform.isDarwin) "Makefile.linux";
 
   enableParallelBuilding = true;
 
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
   installPhase = ''
     runHook preInstall
 
-    install -Dm555 -t $out/bin ${lib.optionalString stdenv.isDarwin "Products/Release/"}{lsar,unar}
+    install -Dm555 -t $out/bin ${lib.optionalString stdenv.hostPlatform.isDarwin "Products/Release/"}{lsar,unar}
     for f in lsar unar; do
       installManPage ./Extra/$f.?
       installShellCompletion --bash --name $f ./Extra/$f.bash_completion
diff --git a/pkgs/tools/archivers/unzip/default.nix b/pkgs/tools/archivers/unzip/default.nix
index ae9a129c766f..2b353598a328 100644
--- a/pkgs/tools/archivers/unzip/default.nix
+++ b/pkgs/tools/archivers/unzip/default.nix
@@ -85,7 +85,7 @@ stdenv.mkDerivation rec {
   ]
   # `lchmod` is not available on Linux, so we remove it to fix "not supported" errors (when the zip file contains symlinks).
   # Alpine (musl) and Debian (glibc) also add this flag.
-  ++ lib.optionals stdenv.isLinux [ "LOCAL_UNZIP=-DNO_LCHMOD" ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ "LOCAL_UNZIP=-DNO_LCHMOD" ];
 
   preConfigure = ''
     sed -i -e 's@CF="-O3 -Wall -I. -DASM_CRC $(LOC)"@CF="-O3 -Wall -I. -DASM_CRC -DLARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 $(LOC)"@' unix/Makefile
diff --git a/pkgs/tools/archivers/wimlib/default.nix b/pkgs/tools/archivers/wimlib/default.nix
index 6aa2c95fa140..18013b39015e 100644
--- a/pkgs/tools/archivers/wimlib/default.nix
+++ b/pkgs/tools/archivers/wimlib/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   pname = "wimlib";
 
   nativeBuildInputs = [ pkg-config makeWrapper ];
-  buildInputs = [ ntfs3g ] ++ lib.optionals (!stdenv.isDarwin) [ fuse3 ];
+  buildInputs = [ ntfs3g ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ fuse3 ];
 
   src = fetchurl {
     url = "https://wimlib.net/downloads/${pname}-${version}.tar.gz";
@@ -22,20 +22,20 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  preBuild = lib.optionalString (!stdenv.isDarwin) ''
+  preBuild = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace programs/mkwinpeimg.in \
       --replace '/usr/lib/syslinux' "${syslinux}/share/syslinux"
   '';
 
   postInstall = let
-    path = lib.makeBinPath  ([ cabextract mtools ntfs3g ] ++ lib.optionals (!stdenv.isDarwin) [ cdrkit syslinux fuse3 ]);
+    path = lib.makeBinPath  ([ cabextract mtools ntfs3g ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ cdrkit syslinux fuse3 ]);
   in ''
     for prog in $out/bin/*; do
       wrapProgram $prog --prefix PATH : $out/bin:${path}
     done
   '';
 
-  doCheck = (!stdenv.isDarwin);
+  doCheck = (!stdenv.hostPlatform.isDarwin);
 
   preCheck = ''
     patchShebangs tests
diff --git a/pkgs/tools/archivers/xarchiver/default.nix b/pkgs/tools/archivers/xarchiver/default.nix
index c41a6010ef6f..a1604f707846 100644
--- a/pkgs/tools/archivers/xarchiver/default.nix
+++ b/pkgs/tools/archivers/xarchiver/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "GTK frontend to 7z,zip,rar,tar,bzip2, gzip,arj, lha, rpm and deb (open and extract only)";
     homepage = "https://github.com/ib/xarchiver";
     maintainers = [ lib.maintainers.domenkozar ];
diff --git a/pkgs/tools/archivers/zip/default.nix b/pkgs/tools/archivers/zip/default.nix
index a192b3878504..2c225489a346 100644
--- a/pkgs/tools/archivers/zip/default.nix
+++ b/pkgs/tools/archivers/zip/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   makefile = "unix/Makefile";
-  buildFlags = if stdenv.isCygwin then [ "cygwin" ] else [ "generic" ];
+  buildFlags = if stdenv.hostPlatform.isCygwin then [ "cygwin" ] else [ "generic" ];
   installFlags = [
     "prefix=${placeholder "out"}"
     "INSTALL=cp"
@@ -38,10 +38,10 @@ stdenv.mkDerivation rec {
     ./buffer-overflow-on-utf8-rh-bug-2165653.patch
     # Fixes forward declaration errors with timezone.c
     ./fix-time.h-not-included.patch
-  ] ++ lib.optionals (enableNLS && !stdenv.isCygwin) [ ./natspec-gentoo.patch.bz2 ];
+  ] ++ lib.optionals (enableNLS && !stdenv.hostPlatform.isCygwin) [ ./natspec-gentoo.patch.bz2 ];
 
   buildInputs = lib.optional enableNLS libnatspec
-    ++ lib.optional stdenv.isCygwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isCygwin libiconv;
 
   meta = with lib; {
     description = "Compressor/archiver for creating and modifying zipfiles";
diff --git a/pkgs/tools/archivers/zpaq/default.nix b/pkgs/tools/archivers/zpaq/default.nix
index 6a03b825e902..791c4fd14f3a 100644
--- a/pkgs/tools/archivers/zpaq/default.nix
+++ b/pkgs/tools/archivers/zpaq/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ perl /* for pod2man */ ];
 
   CPPFLAGS = [ "-Dunix" ] ++
-    lib.optional (!stdenv.isi686 && !stdenv.isx86_64) "-DNOJIT";
+    lib.optional (!stdenv.hostPlatform.isi686 && !stdenv.hostPlatform.isx86_64) "-DNOJIT";
   CXXFLAGS = [ "-O3" "-DNDEBUG" ];
 
   enableParallelBuilding = true;
diff --git a/pkgs/tools/audio/dl-librescore/default.nix b/pkgs/tools/audio/dl-librescore/default.nix
index 78a2b80a0cc7..147ef1094ef2 100644
--- a/pkgs/tools/audio/dl-librescore/default.nix
+++ b/pkgs/tools/audio/dl-librescore/default.nix
@@ -30,7 +30,7 @@ buildNpmPackage rec {
 
   nativeBuildInputs = [
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
diff --git a/pkgs/tools/audio/kaldi/default.nix b/pkgs/tools/audio/kaldi/default.nix
index 5b7242364834..b1daf3aa13e6 100644
--- a/pkgs/tools/audio/kaldi/default.nix
+++ b/pkgs/tools/audio/kaldi/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [
     openblas
     icu
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Accelerate
   ];
 
diff --git a/pkgs/tools/audio/mpd-discord-rpc/default.nix b/pkgs/tools/audio/mpd-discord-rpc/default.nix
index 1da562085158..1dada2fcfc3f 100644
--- a/pkgs/tools/audio/mpd-discord-rpc/default.nix
+++ b/pkgs/tools/audio/mpd-discord-rpc/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/tools/audio/mpdcron/default.nix b/pkgs/tools/audio/mpdcron/default.nix
index c2e93d592f4c..3ced3d5d1382 100644
--- a/pkgs/tools/audio/mpdcron/default.nix
+++ b/pkgs/tools/audio/mpdcron/default.nix
@@ -56,7 +56,7 @@ in stdenv.mkDerivation {
     license     = licenses.gpl2Plus;
     platforms   = platforms.unix;
     maintainers = with maintainers; [ lovek323 manveru ];
-    broken      = stdenv.isDarwin; # fails due to old nokogiri https://github.com/sparklemotion/nokogiri/discussions/3152#discussioncomment-8806607
+    broken      = stdenv.hostPlatform.isDarwin; # fails due to old nokogiri https://github.com/sparklemotion/nokogiri/discussions/3152#discussioncomment-8806607
   };
 }
 # TODO: autoreconfHook this
diff --git a/pkgs/tools/audio/mpris-scrobbler/default.nix b/pkgs/tools/audio/mpris-scrobbler/default.nix
index 859cc9dd6df9..4628ad4910d1 100644
--- a/pkgs/tools/audio/mpris-scrobbler/default.nix
+++ b/pkgs/tools/audio/mpris-scrobbler/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   postPatch = ''
     substituteInPlace src/signon.c \
       --replace "/usr/bin/xdg-open" "${xdg-utils}/bin/xdg-open"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace meson.build \
       --replace "-Werror=format-truncation=0" "" \
       --replace "-Wno-stringop-overflow" ""
@@ -56,10 +56,10 @@ stdenv.mkDerivation rec {
   env.NIX_CFLAGS_COMPILE = toString ([
     # Needed with GCC 12
     "-Wno-error=address"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-sometimes-uninitialized"
     "-Wno-tautological-pointer-compare"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-Wno-array-bounds"
     "-Wno-free-nonheap-object"
     "-Wno-stringop-truncation"
diff --git a/pkgs/tools/audio/openai-whisper-cpp/default.nix b/pkgs/tools/audio/openai-whisper-cpp/default.nix
index c74919dbcb0e..931bcb32743b 100644
--- a/pkgs/tools/audio/openai-whisper-cpp/default.nix
+++ b/pkgs/tools/audio/openai-whisper-cpp/default.nix
@@ -50,7 +50,7 @@ effectiveStdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [
       SDL2
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Accelerate
       CoreGraphics
       CoreML
@@ -70,7 +70,7 @@ effectiveStdenv.mkDerivation (finalAttrs: {
       --replace '${cudaOldStr}' '${cudaNewStr}'
   '';
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     WHISPER_COREML = "1";
     WHISPER_COREML_ALLOW_FALLBACK = "1";
     WHISPER_METAL_EMBED_LIBRARY = "1";
diff --git a/pkgs/tools/backup/awsbck/default.nix b/pkgs/tools/backup/awsbck/default.nix
index 8e00b8787c4a..756d7aa1261f 100644
--- a/pkgs/tools/backup/awsbck/default.nix
+++ b/pkgs/tools/backup/awsbck/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-dMXaIFc0e6PMYiQrokQoUc1xAVCccE92WzM2fl7tOBQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   # tests run in CI on the source repo
   doCheck = false;
diff --git a/pkgs/tools/backup/bacula/default.nix b/pkgs/tools/backup/bacula/default.nix
index 386775960a73..d21336813008 100644
--- a/pkgs/tools/backup/bacula/default.nix
+++ b/pkgs/tools/backup/bacula/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   # libtool.m4 only matches macOS 10.*
-  postPatch = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  postPatch = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     substituteInPlace configure \
       --replace "10.*)" "*)"
   '';
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
       IOKit
     ]
     # acl relies on attr, which I can't get to build on darwin
-    ++ lib.optional (!stdenv.isDarwin) acl;
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) acl;
 
   configureFlags = [
     "--with-sqlite3=${sqlite.dev}"
diff --git a/pkgs/tools/backup/borgbackup/default.nix b/pkgs/tools/backup/borgbackup/default.nix
index ab43dfbef0ce..e0c148108362 100644
--- a/pkgs/tools/backup/borgbackup/default.nix
+++ b/pkgs/tools/backup/borgbackup/default.nix
@@ -58,14 +58,14 @@ python.pkgs.buildPythonApplication rec {
     xxHash
     zstd
     openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     acl
   ];
 
   dependencies = with python.pkgs; [
     msgpack
     packaging
-    (if stdenv.isLinux then pyfuse3 else llfuse)
+    (if stdenv.hostPlatform.isLinux then pyfuse3 else llfuse)
   ];
 
   makeWrapperArgs = [
diff --git a/pkgs/tools/backup/burp/default.nix b/pkgs/tools/backup/burp/default.nix
index 4684631efe9a..dad8fefced89 100644
--- a/pkgs/tools/backup/burp/default.nix
+++ b/pkgs/tools/backup/burp/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   # use openssl_legacy due to burp-2.4.0 not supporting file encryption with openssl 3.0
   # replace with 'openssl' once burp-3.x has been declared stable and this package upgraded
   buildInputs = [ librsync ncurses openssl_legacy zlib uthash ]
-    ++ lib.optional (!stdenv.isDarwin) acl;
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) acl;
 
   configureFlags = [ "--localstatedir=/var" ];
 
diff --git a/pkgs/tools/backup/dar/default.nix b/pkgs/tools/backup/dar/default.nix
index 56a5a9313911..d3424c4ac0c8 100644
--- a/pkgs/tools/backup/dar/default.nix
+++ b/pkgs/tools/backup/dar/default.nix
@@ -48,10 +48,10 @@ stdenv.mkDerivation rec {
     xz
     zlib
     zstd
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     attr
     e2fsprogs
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreFoundation
   ];
 
diff --git a/pkgs/tools/backup/duplicity/default.nix b/pkgs/tools/backup/duplicity/default.nix
index da32f2323343..9411c2e13ea7 100644
--- a/pkgs/tools/backup/duplicity/default.nix
+++ b/pkgs/tools/backup/duplicity/default.nix
@@ -39,7 +39,7 @@ let self = python3.pkgs.buildPythonApplication rec {
     # don't try to use gtar on darwin/bsd
     substituteInPlace testing/functional/test_restart.py \
       --replace-fail 'tarcmd = "gtar"' 'tarcmd = "tar"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # tests try to access these files in the sandbox, but can't deal with EPERM
     substituteInPlace testing/unit/test_globmatch.py \
       --replace-fail /var/log /test/log
@@ -50,7 +50,7 @@ let self = python3.pkgs.buildPythonApplication rec {
       --replace-fail '"/tmp/' 'os.environ.get("TMPDIR")+"/'
   '';
 
-  disabledTests = lib.optionals stdenv.isDarwin [
+  disabledTests = lib.optionals stdenv.hostPlatform.isDarwin [
     # uses /tmp/
     "testing/unit/test_cli_main.py::CommandlineTest::test_intermixed_args"
   ];
@@ -91,9 +91,9 @@ let self = python3.pkgs.buildPythonApplication rec {
     gnutar # Add 'tar' to PATH.
     librsync # Add 'rdiff' to PATH.
     par2cmdline # Add 'par2' to PATH.
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     util-linux # Add 'setsid' to PATH.
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     getconf
   ] ++ (with python3.pkgs; [
     lockfile
@@ -111,7 +111,7 @@ let self = python3.pkgs.buildPythonApplication rec {
       gnupg
       ncftp
       rsync
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       getconf
     ]); in ''
     makeWrapperArgsBak=("''${makeWrapperArgs[@]}")
diff --git a/pkgs/tools/backup/httrack/qt.nix b/pkgs/tools/backup/httrack/qt.nix
index 061c8b2ad6de..d178185229fd 100644
--- a/pkgs/tools/backup/httrack/qt.nix
+++ b/pkgs/tools/backup/httrack/qt.nix
@@ -29,7 +29,7 @@ mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Easy-to-use offline browser / website mirroring utility - QT frontend";
     mainProgram = "httraqt";
     homepage    = "http://www.httrack.com";
diff --git a/pkgs/tools/backup/monolith/default.nix b/pkgs/tools/backup/monolith/default.nix
index b95ada9574ed..307ca6251ca4 100644
--- a/pkgs/tools/backup/monolith/default.nix
+++ b/pkgs/tools/backup/monolith/default.nix
@@ -21,9 +21,9 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-FeD0+s79orFDUVsb205W0pdXgDI+p1UrH3GIfKwUqDQ=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv Security SystemConfiguration ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security SystemConfiguration ];
 
   checkFlags = [ "--skip=tests::cli" ];
 
diff --git a/pkgs/tools/backup/rdedup/default.nix b/pkgs/tools/backup/rdedup/default.nix
index af62fede4071..fdda197f18c5 100644
--- a/pkgs/tools/backup/rdedup/default.nix
+++ b/pkgs/tools/backup/rdedup/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
   buildInputs = [ openssl libsodium xz ]
-    ++ (lib.optional stdenv.isDarwin Security);
+    ++ (lib.optional stdenv.hostPlatform.isDarwin Security);
 
   meta = with lib; {
     description = "Data deduplication with compression and public key encryption";
diff --git a/pkgs/tools/backup/tarsnap/default.nix b/pkgs/tools/backup/tarsnap/default.nix
index ad7fc761d843..83d205bb9b50 100644
--- a/pkgs/tools/backup/tarsnap/default.nix
+++ b/pkgs/tools/backup/tarsnap/default.nix
@@ -31,8 +31,8 @@ stdenv.mkDerivation rec {
     install -m 444 -D ${zshCompletion} $out/share/zsh/site-functions/_tarsnap
   '';
 
-  buildInputs = [ openssl zlib ] ++ lib.optional stdenv.isLinux e2fsprogs
-                ++ lib.optional stdenv.isDarwin bzip2;
+  buildInputs = [ openssl zlib ] ++ lib.optional stdenv.hostPlatform.isLinux e2fsprogs
+                ++ lib.optional stdenv.hostPlatform.isDarwin bzip2;
 
   meta = {
     description = "Online backups for the truly paranoid";
diff --git a/pkgs/tools/bluetooth/blueman/default.nix b/pkgs/tools/bluetooth/blueman/default.nix
index 572a73be3c88..effde184d1f8 100644
--- a/pkgs/tools/bluetooth/blueman/default.nix
+++ b/pkgs/tools/bluetooth/blueman/default.nix
@@ -1,7 +1,7 @@
 { config, stdenv, lib, fetchurl, intltool, pkg-config, python3Packages, bluez, gtk3
 , obex_data_server, xdg-utils, dnsmasq, dhcpcd, iproute2
 , adwaita-icon-theme, librsvg, wrapGAppsHook3, gobject-introspection
-, networkmanager, withPulseAudio ? config.pulseaudio or stdenv.isLinux, libpulseaudio }:
+, networkmanager, withPulseAudio ? config.pulseaudio or stdenv.hostPlatform.isLinux, libpulseaudio }:
 
 let
   pythonPackages = python3Packages;
diff --git a/pkgs/tools/cd-dvd/cdrdao/default.nix b/pkgs/tools/cd-dvd/cdrdao/default.nix
index 84cad2a5d96d..b4e93adce864 100644
--- a/pkgs/tools/cd-dvd/cdrdao/default.nix
+++ b/pkgs/tools/cd-dvd/cdrdao/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation (finalAttrs: {
     libvorbis
     libmad
     libao
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     IOKit
   ];
diff --git a/pkgs/tools/cd-dvd/cdrkit/default.nix b/pkgs/tools/cd-dvd/cdrkit/default.nix
index ae4a06bb57f2..7fd51d5d254f 100644
--- a/pkgs/tools/cd-dvd/cdrkit/default.nix
+++ b/pkgs/tools/cd-dvd/cdrkit/default.nix
@@ -11,8 +11,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ zlib bzip2 perl ] ++
-    lib.optionals stdenv.isLinux [ libcap ] ++
-    lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Carbon IOKit iconv ]);
+    lib.optionals stdenv.hostPlatform.isLinux [ libcap ] ++
+    lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Carbon IOKit iconv ]);
 
   hardeningDisable = [ "format" ];
   env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isMusl [
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   # efi-boot-patch extracted from http://arm.koji.fedoraproject.org/koji/rpminfo?rpmID=174244
   patches = [ ./include-path.patch ./cdrkit-1.1.9-efi-boot.patch ./cdrkit-1.1.11-fno-common.patch ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace libusal/scsi-mac-iokit.c \
       --replace "IOKit/scsi-commands/SCSITaskLib.h" "IOKit/scsi/SCSITaskLib.h"
     substituteInPlace genisoimage/sha256.c \
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
         --replace "#define HAVE_RCMD 1" "#undef HAVE_RCMD"
   '';
 
-  postConfigure = lib.optionalString stdenv.isDarwin ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in */CMakeFiles/*.dir/link.txt ; do
       substituteInPlace "$f" \
         --replace "-lrt" "-framework IOKit"
diff --git a/pkgs/tools/cd-dvd/cdrtools/default.nix b/pkgs/tools/cd-dvd/cdrtools/default.nix
index 053aebecaf41..d264a0f8bdb3 100644
--- a/pkgs/tools/cd-dvd/cdrtools/default.nix
+++ b/pkgs/tools/cd-dvd/cdrtools/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ m4 ];
-  buildInputs = if stdenv.isDarwin then [ Carbon IOKit ] else [ acl libcap ];
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ Carbon IOKit ] else [ acl libcap ];
 
   postPatch = ''
     sed "/\.mk3/d" -i libschily/Targets.man
diff --git a/pkgs/tools/cd-dvd/dvd+rw-tools/default.nix b/pkgs/tools/cd-dvd/dvd+rw-tools/default.nix
index a6b75e14bef7..5b0287efed81 100644
--- a/pkgs/tools/cd-dvd/dvd+rw-tools/default.nix
+++ b/pkgs/tools/cd-dvd/dvd+rw-tools/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ m4 ];
   buildInputs = [ cdrtools ]
-    ++ lib.optionals stdenv.isDarwin [ IOKit ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   makeFlags = [
     "prefix=${placeholder "out"}"
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     "CXX=${stdenv.cc.targetPrefix}c++"
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     # error: invalid suffix on literal; C++11 requires a space between literal and identifier
     "-Wno-reserved-user-defined-literal"
     # error: non-constant-expression cannot be narrowed from type 'size_t' (aka 'unsigned long') to 'IOByteCount' (aka 'unsigned int') in initializer list
diff --git a/pkgs/tools/compression/bzip3/default.nix b/pkgs/tools/compression/bzip3/default.nix
index 92ddefdb8662..889f64b52d8b 100644
--- a/pkgs/tools/compression/bzip3/default.nix
+++ b/pkgs/tools/compression/bzip3/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   configureFlags = [
     "--disable-arch-native"
-  ] ++ lib.optionals stdenv.isDarwin [ "--disable-link-time-optimization" ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--disable-link-time-optimization" ];
 
   passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
 
diff --git a/pkgs/tools/compression/imagelol/default.nix b/pkgs/tools/compression/imagelol/default.nix
index 89515e31b4d2..9d5cc34b3827 100644
--- a/pkgs/tools/compression/imagelol/default.nix
+++ b/pkgs/tools/compression/imagelol/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     cp ./ImageLOL $out/bin
   '';
 
-  cmakeFlags = [ (lib.cmakeFeature "CMAKE_C_FLAGS" "-std=gnu90") ] ++ lib.optional (stdenv.isDarwin && stdenv.isAarch64) "-DPNG_ARM_NEON=off";
+  cmakeFlags = [ (lib.cmakeFeature "CMAKE_C_FLAGS" "-std=gnu90") ] ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) "-DPNG_ARM_NEON=off";
 
   meta = with lib; {
     homepage = "https://github.com/MCredstoner2004/ImageLOL";
diff --git a/pkgs/tools/compression/lrzip/default.nix b/pkgs/tools/compression/lrzip/default.nix
index f485bab4a749..eab035f06204 100644
--- a/pkgs/tools/compression/lrzip/default.nix
+++ b/pkgs/tools/compression/lrzip/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-Mb324ojtLV0S10KhL7Vjf3DhSOtCy1pFMTzvLkTnpXM=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Building the ASM/x86 directory creates an empty archive,
     # which fails on darwin, so remove it
     # https://github.com/ckolivas/lrzip/issues/193
diff --git a/pkgs/tools/compression/pigz/default.nix b/pkgs/tools/compression/pigz/default.nix
index 106b14b81b64..a6eaab1a6ef2 100644
--- a/pkgs/tools/compression/pigz/default.nix
+++ b/pkgs/tools/compression/pigz/default.nix
@@ -13,11 +13,11 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ zlib ] ++ lib.optional stdenv.isLinux util-linux;
+  buildInputs = [ zlib ] ++ lib.optional stdenv.hostPlatform.isLinux util-linux;
 
   makeFlags = [ "CC=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc" ];
 
-  doCheck = stdenv.isLinux;
+  doCheck = stdenv.hostPlatform.isLinux;
   checkTarget = "tests";
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/tools/compression/zstd/default.nix b/pkgs/tools/compression/zstd/default.nix
index ba5fb90c1360..f9d3a3d074c9 100644
--- a/pkgs/tools/compression/zstd/default.nix
+++ b/pkgs/tools/compression/zstd/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ]
-   ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
+   ++ lib.optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
   buildInputs = lib.optional stdenv.hostPlatform.isUnix bash;
 
   patches = [
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     substituteInPlace build/cmake/tests/CMakeLists.txt \
       --replace 'libzstd_static' 'libzstd_shared'
     sed -i \
-      "1aexport ${lib.optionalString stdenv.isDarwin "DY"}LD_LIBRARY_PATH=$PWD/build_/lib" \
+      "1aexport ${lib.optionalString stdenv.hostPlatform.isDarwin "DY"}LD_LIBRARY_PATH=$PWD/build_/lib" \
       tests/playTests.sh
   '';
 
@@ -87,7 +87,7 @@ stdenv.mkDerivation rec {
   '' + lib.optionalString buildContrib (
     ''
       cp contrib/pzstd/pzstd $bin/bin/pzstd
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -change @rpath/libzstd.1.dylib $out/lib/libzstd.1.dylib $bin/bin/pzstd
     ''
   );
diff --git a/pkgs/tools/filesystems/aefs/default.nix b/pkgs/tools/filesystems/aefs/default.nix
index af4e20ac55ee..c56a4b189e15 100644
--- a/pkgs/tools/filesystems/aefs/default.nix
+++ b/pkgs/tools/filesystems/aefs/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
   #
   #     $ tar xf "$(nix-build -A aefs.src)"
   #     $ grep -R FUSE_USE_VERSION
-  configureFlags = lib.optional stdenv.isDarwin "CPPFLAGS=-DFUSE_USE_VERSION=26";
+  configureFlags = lib.optional stdenv.hostPlatform.isDarwin "CPPFLAGS=-DFUSE_USE_VERSION=26";
 
   nativeBuildInputs = [ autoreconfHook git ];
 
@@ -37,6 +37,6 @@ stdenv.mkDerivation {
     maintainers = [ ];
     license = licenses.gpl2Plus;
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/filesystems/android-file-transfer/default.nix b/pkgs/tools/filesystems/android-file-transfer/default.nix
index b5fe1a4e85ea..78d60b90b395 100644
--- a/pkgs/tools/filesystems/android-file-transfer/default.nix
+++ b/pkgs/tools/filesystems/android-file-transfer/default.nix
@@ -26,7 +26,7 @@ mkDerivation rec {
   nativeBuildInputs = [ cmake readline pkg-config wrapQtAppsHook ];
   buildInputs = [ fuse qtbase qttools ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/Applications
     mv $out/*.app $out/Applications
   '';
diff --git a/pkgs/tools/filesystems/apfs-fuse/default.nix b/pkgs/tools/filesystems/apfs-fuse/default.nix
index 5881d361c549..88b2c5d3e624 100644
--- a/pkgs/tools/filesystems/apfs-fuse/default.nix
+++ b/pkgs/tools/filesystems/apfs-fuse/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation {
     fetchSubmodules = true;
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace "/usr/local/lib/libosxfuse.dylib" "fuse"
   '';
@@ -20,14 +20,14 @@ stdenv.mkDerivation {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [
-    (if stdenv.isDarwin then fuse else fuse3)
+    (if stdenv.hostPlatform.isDarwin then fuse else fuse3)
     bzip2
     zlib
-  ] ++ lib.optional stdenv.isLinux attr;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux attr;
 
-  cmakeFlags = lib.optional stdenv.isDarwin "-DUSE_FUSE3=OFF";
+  cmakeFlags = lib.optional stdenv.hostPlatform.isDarwin "-DUSE_FUSE3=OFF";
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DUSE_FUSE2";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DUSE_FUSE2";
 
   postFixup = ''
     ln -s $out/bin/apfs-fuse $out/bin/mount.fuse.apfs-fuse
diff --git a/pkgs/tools/filesystems/bindfs/default.nix b/pkgs/tools/filesystems/bindfs/default.nix
index a8013bd8600b..f086e9416ad6 100644
--- a/pkgs/tools/filesystems/bindfs/default.nix
+++ b/pkgs/tools/filesystems/bindfs/default.nix
@@ -19,9 +19,9 @@ stdenv.mkDerivation (finalAttrs: {
     pkg-config
   ];
 
-  buildInputs = if stdenv.isDarwin then [ fuse ] else [ fuse3 ];
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ fuse ] else [ fuse3 ];
 
-  configureFlags = lib.optional stdenv.isDarwin "--disable-macos-fs-link";
+  configureFlags = lib.optional stdenv.hostPlatform.isDarwin "--disable-macos-fs-link";
 
   postFixup = ''
     ln -s $out/bin/bindfs $out/bin/mount.fuse.bindfs
diff --git a/pkgs/tools/filesystems/boxfs/default.nix b/pkgs/tools/filesystems/boxfs/default.nix
index 04106ee68b31..b12966541c99 100644
--- a/pkgs/tools/filesystems/boxfs/default.nix
+++ b/pkgs/tools/filesystems/boxfs/default.nix
@@ -43,7 +43,7 @@ in stdenv.mkDerivation {
   buildFlags = [
     "static"
     "CC=${stdenv.cc.targetPrefix}cc"
-  ] ++ lib.optional stdenv.isDarwin "CFLAGS=-D_BSD_SOURCE";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "CFLAGS=-D_BSD_SOURCE";
 
   installPhase = ''
     mkdir -p $out/bin
diff --git a/pkgs/tools/filesystems/ceph/default.nix b/pkgs/tools/filesystems/ceph/default.nix
index e4f0bae9b27b..e5beaf3841df 100644
--- a/pkgs/tools/filesystems/ceph/default.nix
+++ b/pkgs/tools/filesystems/ceph/default.nix
@@ -382,7 +382,7 @@ in rec {
       utf8proc
       zlib
       zstd
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       keyutils
       libcap_ng
       liburing
@@ -457,7 +457,7 @@ in rec {
       "-DWITH_MGR_DASHBOARD_FRONTEND:BOOL=OFF"
       # WITH_XFS has been set default ON from Ceph 16, keeping it optional in nixpkgs for now
       ''-DWITH_XFS=${if optLibxfs != null then "ON" else "OFF"}''
-    ] ++ lib.optional stdenv.isLinux "-DWITH_SYSTEM_LIBURING=ON";
+    ] ++ lib.optional stdenv.hostPlatform.isLinux "-DWITH_SYSTEM_LIBURING=ON";
 
     preBuild =
       # The legacy-option-headers target is not correctly empbedded in the build graph.
diff --git a/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix b/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix
index 8583cce73dae..4da68dfb751b 100644
--- a/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix
+++ b/pkgs/tools/filesystems/ceph/old-python-packages/cryptography.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
 
   buildInputs =
     [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       Security
       libiconv
     ]
@@ -107,7 +107,7 @@ buildPythonPackage rec {
       # save compute time by not running benchmarks
       "tests/bench"
     ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
       # aarch64-darwin forbids W+X memory, but this tests depends on it:
       # * https://cffi.readthedocs.io/en/latest/using.html#callbacks
       "tests/hazmat/backends/test_openssl_memleak.py"
diff --git a/pkgs/tools/filesystems/cryfs/default.nix b/pkgs/tools/filesystems/cryfs/default.nix
index 588dcb320aa5..52444e56cb05 100644
--- a/pkgs/tools/filesystems/cryfs/default.nix
+++ b/pkgs/tools/filesystems/cryfs/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
   ]; # ++ lib.optional doCheck "-DCMAKE_PREFIX_PATH=${gtest.dev}/lib/cmake";
 
   # macFUSE needs to be installed for the test to succeed on Darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/tools/filesystems/curlftpfs/default.nix b/pkgs/tools/filesystems/curlftpfs/default.nix
index 7b3760ba5aa2..06a86a74b523 100644
--- a/pkgs/tools/filesystems/curlftpfs/default.nix
+++ b/pkgs/tools/filesystems/curlftpfs/default.nix
@@ -21,9 +21,9 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ fuse curl glib zlib ];
 
-  CFLAGS = lib.optionalString stdenv.isDarwin "-D__off_t=off_t";
+  CFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-D__off_t=off_t";
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix the build on macOS with macFUSE installed. Needs autoreconfHook for
     # this change to effect
     substituteInPlace configure.ac --replace \
diff --git a/pkgs/tools/filesystems/dosfstools/default.nix b/pkgs/tools/filesystems/dosfstools/default.nix
index eda54d341f9a..0305e6514640 100644
--- a/pkgs/tools/filesystems/dosfstools/default.nix
+++ b/pkgs/tools/filesystems/dosfstools/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ autoreconfHook pkg-config ]
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   # configure.ac:75: error: required file './config.rpath' not found
   # https://github.com/dosfstools/dosfstools/blob/master/autogen.sh
diff --git a/pkgs/tools/filesystems/e2fsprogs/default.nix b/pkgs/tools/filesystems/e2fsprogs/default.nix
index b8443e8ac880..4d0849b896d0 100644
--- a/pkgs/tools/filesystems/e2fsprogs/default.nix
+++ b/pkgs/tools/filesystems/e2fsprogs/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, buildPackages, fetchurl, fetchpatch, pkg-config, libuuid, gettext, texinfo
-, withFuse ? stdenv.isLinux, fuse3
+, withFuse ? stdenv.hostPlatform.isLinux, fuse3
 , shared ? !stdenv.hostPlatform.isStatic
 , e2fsprogs, runCommand
 }:
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
   ];
 
   configureFlags =
-    if stdenv.isLinux then [
+    if stdenv.hostPlatform.isLinux then [
       # It seems that the e2fsprogs is one of the few packages that cannot be
       # build with shared and static libs.
       (if shared then "--enable-elf-shlibs" else "--disable-elf-shlibs")
diff --git a/pkgs/tools/filesystems/erofs-utils/default.nix b/pkgs/tools/filesystems/erofs-utils/default.nix
index 3946523ccb10..93e6fd18f984 100644
--- a/pkgs/tools/filesystems/erofs-utils/default.nix
+++ b/pkgs/tools/filesystems/erofs-utils/default.nix
@@ -10,7 +10,7 @@
   xz,
   zlib,
   libselinux,
-  fuseSupport ? stdenv.isLinux,
+  fuseSupport ? stdenv.hostPlatform.isLinux,
   selinuxSupport ? false,
   lzmaSupport ? false,
 }:
diff --git a/pkgs/tools/filesystems/f3/default.nix b/pkgs/tools/filesystems/f3/default.nix
index ebdedd5b4aa3..04430fc23ee4 100644
--- a/pkgs/tools/filesystems/f3/default.nix
+++ b/pkgs/tools/filesystems/f3/default.nix
@@ -26,13 +26,13 @@ stdenv.mkDerivation rec {
     done
   '';
 
-  buildInputs = lib.optionals stdenv.isLinux [ systemd parted ]
-    ++ lib.optionals stdenv.isDarwin [ argp-standalone ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ systemd parted ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ argp-standalone ];
 
   buildFlags = [
     "all" # f3read, f3write
   ]
-  ++ lib.optional stdenv.isLinux "extra"; # f3brew, f3fix, f3probe
+  ++ lib.optional stdenv.hostPlatform.isLinux "extra"; # f3brew, f3fix, f3probe
 
   installFlags = [
     "PREFIX=${placeholder "out"}"
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
   installTargets = [
     "install"
   ]
-  ++ lib.optional stdenv.isLinux "install-extra";
+  ++ lib.optional stdenv.hostPlatform.isLinux "install-extra";
 
   postInstall = ''
     install -Dm555 -t $out/bin f3write.h2w log-f3wr
diff --git a/pkgs/tools/filesystems/file-rename/default.nix b/pkgs/tools/filesystems/file-rename/default.nix
index 8bc7a899cd3b..e2e1eccae216 100644
--- a/pkgs/tools/filesystems/file-rename/default.nix
+++ b/pkgs/tools/filesystems/file-rename/default.nix
@@ -20,7 +20,7 @@ perlPackages.buildPerlPackage {
       --replace "#!${perl}/bin/perl" "#!${perl}/bin/perl -I $out/${perl.libPrefix}"
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Perl extension for renaming multiple files";
diff --git a/pkgs/tools/filesystems/garage/default.nix b/pkgs/tools/filesystems/garage/default.nix
index 2430536656dc..34f9da67ae64 100644
--- a/pkgs/tools/filesystems/garage/default.nix
+++ b/pkgs/tools/filesystems/garage/default.nix
@@ -35,7 +35,7 @@ let
 
     buildInputs = [
       openssl
-    ] ++ lib.optional stdenv.isDarwin Security;
+    ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
     checkInputs = [
       cacert
@@ -99,7 +99,7 @@ rec {
     hash = "sha256-2QGbR6YvMQeMxN3n1MMJ5qfBcEJ5hjXARUOfEn+m4Jc=";
     cargoHash = "sha256-1cGlJP/RRgxt3GGMN1c+7Y5lLHJyvHEnpLsR35R5FfI=";
     cargoPatches = [ ./update-time-0.8.patch ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
   garage_0_9_4 = generic {
@@ -107,14 +107,14 @@ rec {
     hash = "sha256-2ZaxenwaVGYYUjUJaGgnGpZNQprQV9+Jns2sXM6cowk=";
     cargoHash = "sha256-1Hrip4R5dr31czOcFMGW4ZvVfVwvdd7LkwukwNpS3o4=";
     cargoPatches = [ ./update-time.patch ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
   garage_1_0_1 = generic {
     version = "1.0.1";
     hash = "sha256-f6N2asycN04I6U5XQ5LEAqYu/v5jYZiFCxZ8YQ32XyM=";
     cargoHash = "sha256-jpc/vaygC5WNSkVA3P01mCRk9Nx/CUumE893tHWoe34=";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 
   garage_0_8 = garage_0_8_7;
diff --git a/pkgs/tools/filesystems/genimage/default.nix b/pkgs/tools/filesystems/genimage/default.nix
index 8de22d3efcdf..3e6ae58049bd 100644
--- a/pkgs/tools/filesystems/genimage/default.nix
+++ b/pkgs/tools/filesystems/genimage/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://git.pengutronix.de/cgit/genimage";
     description = "Generate filesystem images from directory trees";
     license = licenses.gpl2Plus;
diff --git a/pkgs/tools/filesystems/go-mtpfs/default.nix b/pkgs/tools/filesystems/go-mtpfs/default.nix
index 4a1341dce7b0..26655053574e 100644
--- a/pkgs/tools/filesystems/go-mtpfs/default.nix
+++ b/pkgs/tools/filesystems/go-mtpfs/default.nix
@@ -29,7 +29,7 @@ buildGoModule rec {
     homepage = "https://github.com/hanwen/go-mtpfs";
     license = licenses.bsd3;
     maintainers = [ ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "go-mtpfs";
   };
 }
diff --git a/pkgs/tools/filesystems/goofys/default.nix b/pkgs/tools/filesystems/goofys/default.nix
index c8840e0fd3bc..06039d529d56 100644
--- a/pkgs/tools/filesystems/goofys/default.nix
+++ b/pkgs/tools/filesystems/goofys/default.nix
@@ -30,7 +30,7 @@ buildGoModule {
     description = "High-performance, POSIX-ish Amazon S3 file system written in Go";
     license = [ lib.licenses.mit ];
     maintainers = [ lib.maintainers.adisbladis ];
-    broken = stdenv.isDarwin; # needs to update gopsutil to at least v3.21.3 to include https://github.com/shirou/gopsutil/pull/1042
+    broken = stdenv.hostPlatform.isDarwin; # needs to update gopsutil to at least v3.21.3 to include https://github.com/shirou/gopsutil/pull/1042
     mainProgram = "goofys";
   };
 
diff --git a/pkgs/tools/filesystems/moosefs/default.nix b/pkgs/tools/filesystems/moosefs/default.nix
index 4f5524d6734c..51066544749b 100644
--- a/pkgs/tools/filesystems/moosefs/default.nix
+++ b/pkgs/tools/filesystems/moosefs/default.nix
@@ -28,15 +28,15 @@ stdenv.mkDerivation rec {
 
   strictDeps = true;
 
-  buildFlags = lib.optionals stdenv.isDarwin [ "CPPFLAGS=-UHAVE_STRUCT_STAT_ST_BIRTHTIME" ];
+  buildFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "CPPFLAGS=-UHAVE_STRUCT_STAT_ST_BIRTHTIME" ];
 
   # Fix the build on macOS with macFUSE installed
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace \
       "/usr/local/lib/pkgconfig" "/nonexistent"
   '';
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace config.h --replace \
       "#define HAVE_STRUCT_STAT_ST_BIRTHTIME 1" \
       "#undef HAVE_STRUCT_STAT_ST_BIRTHTIME"
diff --git a/pkgs/tools/filesystems/mtools/default.nix b/pkgs/tools/filesystems/mtools/default.nix
index ef5eafc40508..3e2c75aeb092 100644
--- a/pkgs/tools/filesystems/mtools/default.nix
+++ b/pkgs/tools/filesystems/mtools/default.nix
@@ -9,12 +9,12 @@ stdenv.mkDerivation rec {
     hash = "sha256-N9xN8CJTPD1LLsHHiXPCfH6LWFN0wtRqtkxqPbMe3bg=";
   };
 
-  patches = lib.optional stdenv.isDarwin ./UNUSED-darwin.patch;
+  patches = lib.optional stdenv.hostPlatform.isDarwin ./UNUSED-darwin.patch;
 
   # fails to find X on darwin
-  configureFlags = lib.optional stdenv.isDarwin "--without-x";
+  configureFlags = lib.optional stdenv.hostPlatform.isDarwin "--without-x";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   doCheck = true;
 
diff --git a/pkgs/tools/filesystems/mtpfs/default.nix b/pkgs/tools/filesystems/mtpfs/default.nix
index d84f9cc9b9b1..a0ca5e5a82aa 100644
--- a/pkgs/tools/filesystems/mtpfs/default.nix
+++ b/pkgs/tools/filesystems/mtpfs/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     platforms = platforms.all;
     license = licenses.gpl3;
     maintainers = [ maintainers.qknight ];
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/mtpfs.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/mtpfs.x86_64-darwin
     mainProgram = "mtpfs";
   };
 }
diff --git a/pkgs/tools/filesystems/ntfs-3g/default.nix b/pkgs/tools/filesystems/ntfs-3g/default.nix
index 56d6bdc7fba2..5a9426cee486 100644
--- a/pkgs/tools/filesystems/ntfs-3g/default.nix
+++ b/pkgs/tools/filesystems/ntfs-3g/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ gettext libuuid ]
     ++ lib.optionals crypto [ gnutls libgcrypt ]
-    ++ lib.optionals stdenv.isDarwin [ macfuse-stubs DiskArbitration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ macfuse-stubs DiskArbitration ];
 
   # Note: libgcrypt is listed here non-optionally because its m4 macros are
   # being used in ntfs-3g's configure.ac.
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     "--enable-extras"
     "--with-mount-helper=${mount}/bin/mount"
     "--with-umount-helper=${mount}/bin/umount"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--with-modprobe-helper=${kmod}/bin/modprobe"
   ];
 
diff --git a/pkgs/tools/filesystems/snapraid/default.nix b/pkgs/tools/filesystems/snapraid/default.nix
index 83353394e009..e964f944d3a8 100644
--- a/pkgs/tools/filesystems/snapraid/default.nix
+++ b/pkgs/tools/filesystems/snapraid/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   VERSION = version;
 
-  doCheck = !(stdenv.isDarwin && stdenv.isx86_64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64);
 
   nativeBuildInputs = [
     autoreconfHook
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ ];
 
   # SMART is only supported on Linux and requires the smartmontools package
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/snapraid \
      --prefix PATH : ${lib.makeBinPath [ smartmontools ]}
   '';
diff --git a/pkgs/tools/filesystems/sshfs-fuse/common.nix b/pkgs/tools/filesystems/sshfs-fuse/common.nix
index 932c7693dc88..3654c77cc4b8 100644
--- a/pkgs/tools/filesystems/sshfs-fuse/common.nix
+++ b/pkgs/tools/filesystems/sshfs-fuse/common.nix
@@ -8,7 +8,7 @@
 }:
 
 let
-  fuse = if stdenv.isDarwin then macfuse-stubs else fuse3;
+  fuse = if stdenv.hostPlatform.isDarwin then macfuse-stubs else fuse3;
 in stdenv.mkDerivation rec {
   pname = "sshfs-fuse";
   inherit version;
@@ -33,12 +33,12 @@ in stdenv.mkDerivation rec {
   postInstall = ''
     mkdir -p $out/sbin
     ln -sf $out/bin/sshfs $out/sbin/mount.sshfs
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     wrapProgram $out/bin/sshfs --prefix PATH : "${openssh}/bin"
   '';
 
   # doCheck = true;
-  checkPhase = lib.optionalString (!stdenv.isDarwin) ''
+  checkPhase = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # The tests need fusermount:
     mkdir bin
     cp ${fuse}/bin/fusermount3 bin/fusermount
diff --git a/pkgs/tools/filesystems/sshfs-fuse/default.nix b/pkgs/tools/filesystems/sshfs-fuse/default.nix
index 2f11bb0047ad..bc836ac3abad 100644
--- a/pkgs/tools/filesystems/sshfs-fuse/default.nix
+++ b/pkgs/tools/filesystems/sshfs-fuse/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, callPackage, fetchpatch }:
 
 let mkSSHFS = args: callPackage (import ./common.nix args) { };
-in if stdenv.isDarwin then
+in if stdenv.hostPlatform.isDarwin then
   mkSSHFS {
     version = "2.10"; # macFUSE isn't yet compatible with libfuse 3.x
     sha256 = "1dmw4kx6vyawcywiv8drrajnam0m29mxfswcp4209qafzx3mjlp1";
diff --git a/pkgs/tools/filesystems/svnfs/default.nix b/pkgs/tools/filesystems/svnfs/default.nix
index 8aa66de8da3f..2f0e32799d80 100644
--- a/pkgs/tools/filesystems/svnfs/default.nix
+++ b/pkgs/tools/filesystems/svnfs/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   #
   #     $ tar xf "$(nix-build -A svnfs.src)"
   #     $ grep -R FUSE_USE_VERSION
-  configureFlags = lib.optionals stdenv.isDarwin [ "CFLAGS=-DFUSE_USE_VERSION=25" ];
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "CFLAGS=-DFUSE_USE_VERSION=25" ];
 
   # why is this required?
   preConfigure=''
diff --git a/pkgs/tools/filesystems/unionfs-fuse/default.nix b/pkgs/tools/filesystems/unionfs-fuse/default.nix
index 4dc9ca9de6e6..2518cfb24ba3 100644
--- a/pkgs/tools/filesystems/unionfs-fuse/default.nix
+++ b/pkgs/tools/filesystems/unionfs-fuse/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     ./prevent-kill-on-shutdown.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace CMakeLists.txt \
       --replace '/usr/local/include/osxfuse/fuse' '${fuse}/include/fuse'
   '';
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   #
   # This must be done in preConfigure because the build process removes
   # helper from the source directory during the build.
-  preConfigure = lib.optionalString (!stdenv.isDarwin) ''
+  preConfigure = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mkdir -p $out/sbin
     cp -a mount.unionfs $out/sbin/mount.unionfs-fuse
     substituteInPlace $out/sbin/mount.unionfs-fuse --replace mount.fuse ${fuse}/sbin/mount.fuse
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "FUSE UnionFS implementation";
     homepage = "https://github.com/rpodgorny/unionfs-fuse";
     license = licenses.bsd3;
diff --git a/pkgs/tools/filesystems/wdfs/default.nix b/pkgs/tools/filesystems/wdfs/default.nix
index 3f8897c091bc..9c1b68cc6307 100644
--- a/pkgs/tools/filesystems/wdfs/default.nix
+++ b/pkgs/tools/filesystems/wdfs/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [fuse glib neon];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix the build on macOS with macFUSE installed. Needs autoreconfHook to
     # take effect.
     substituteInPlace configure.ac --replace \
diff --git a/pkgs/tools/filesystems/yandex-disk/default.nix b/pkgs/tools/filesystems/yandex-disk/default.nix
index ad3c44faf616..6e7a19ad8ee8 100644
--- a/pkgs/tools/filesystems/yandex-disk/default.nix
+++ b/pkgs/tools/filesystems/yandex-disk/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, writeText, zlib, rpmextract, patchelf, which }:
 
 let
-  p = if stdenv.is64bit then {
+  p = if stdenv.hostPlatform.is64bit then {
       arch = "x86_64";
       gcclib = "${stdenv.cc.cc.lib}/lib64";
       sha256 = "sha256-HH/pLZmDr6m/B3e6MHafDGnNWR83oR2y1ijVMR/LOF0=";
diff --git a/pkgs/tools/games/ajour/default.nix b/pkgs/tools/games/ajour/default.nix
index 7416d4f717ab..5ed670a77de6 100644
--- a/pkgs/tools/games/ajour/default.nix
+++ b/pkgs/tools/games/ajour/default.nix
@@ -92,7 +92,7 @@ in rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/casperstorm/ajour";
     changelog = "https://github.com/casperstorm/ajour/blob/master/CHANGELOG.md";
     license = licenses.mit;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ hexa ];
   };
 }
diff --git a/pkgs/tools/games/pokefinder/default.nix b/pkgs/tools/games/pokefinder/default.nix
index e4d773684343..6ea5f168a8f4 100644
--- a/pkgs/tools/games/pokefinder/default.nix
+++ b/pkgs/tools/games/pokefinder/default.nix
@@ -42,10 +42,10 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
-  '' + lib.optionalString (stdenv.isDarwin) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
     mkdir -p $out/Applications
     cp -R Source/PokeFinder.app $out/Applications
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     install -D Source/PokeFinder $out/bin/PokeFinder
     mkdir -p $out/share/pixmaps
     convert "$src/Source/Form/Images/pokefinder.ico[-1]" $out/share/pixmaps/pokefinder.png
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
-  nativeBuildInputs = [ cmake wrapQtAppsHook python3 ] ++ lib.optionals (!stdenv.isDarwin) [ copyDesktopItems imagemagick ];
+  nativeBuildInputs = [ cmake wrapQtAppsHook python3 ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ copyDesktopItems imagemagick ];
 
   desktopItems = [
     (makeDesktopItem {
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildInputs = [ qtbase qttools ]
-    ++ lib.optionals stdenv.isLinux [ qtwayland ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ qtwayland ];
 
   passthru.updateScript = gitUpdater {
     rev-prefix = "v";
diff --git a/pkgs/tools/games/ukmm/default.nix b/pkgs/tools/games/ukmm/default.nix
index 98709602dcde..9a640b004bf8 100644
--- a/pkgs/tools/games/ukmm/default.nix
+++ b/pkgs/tools/games/ukmm/default.nix
@@ -82,7 +82,7 @@ rustPlatform.buildRustPackage rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ kira-bruneau ];
     platforms = platforms.linux;
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
     mainProgram = "ukmm";
   };
 }
diff --git a/pkgs/tools/graphics/amber/default.nix b/pkgs/tools/graphics/amber/default.nix
index 0d86e5c75bfb..12ff88d1340e 100644
--- a/pkgs/tools/graphics/amber/default.nix
+++ b/pkgs/tools/graphics/amber/default.nix
@@ -70,7 +70,7 @@ stdenv.mkDerivation (finalAttrs: {
     makeWrapper
     pkg-config
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
diff --git a/pkgs/tools/graphics/astc-encoder/default.nix b/pkgs/tools/graphics/astc-encoder/default.nix
index a67fdc1d3978..31758877c469 100644
--- a/pkgs/tools/graphics/astc-encoder/default.nix
+++ b/pkgs/tools/graphics/astc-encoder/default.nix
@@ -81,6 +81,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     license = licenses.asl20;
     maintainers = with maintainers; [ dasisdormax ];
-    broken = !stdenv.is64bit;
+    broken = !stdenv.hostPlatform.is64bit;
   };
 }
diff --git a/pkgs/tools/graphics/asymptote/default.nix b/pkgs/tools/graphics/asymptote/default.nix
index 55fce30cd990..ba0dd70254b3 100644
--- a/pkgs/tools/graphics/asymptote/default.nix
+++ b/pkgs/tools/graphics/asymptote/default.nix
@@ -41,13 +41,13 @@ stdenv.mkDerivation (finalAttrs: {
     boehmgc ncurses readline gsl libsigsegv
     zlib perl curl qtbase qtsvg boost
     (python3.withPackages (ps: with ps; [ cson numpy pyqt5 ]))
-  ] ++ lib.optionals stdenv.isLinux [ libtirpc ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libtirpc ];
 
   propagatedBuildInputs = [
     glm
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libglut libGLU libGL
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     OpenGL GLUT Cocoa
   ]);
 
@@ -77,7 +77,7 @@ stdenv.mkDerivation (finalAttrs: {
   # do not use bundled libgc.so
   configureFlags = [ "--enable-gc=system" ]
     # TODO add open_memstream to enable XDR/V3D on Darwin (requires memstream or >=10.13 Apple SDK)
-    ++ lib.optional stdenv.isDarwin "--enable-xdr=no";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--enable-xdr=no";
 
   env.NIX_CFLAGS_COMPILE = "-I${boehmgc.dev}/include/gc";
 
diff --git a/pkgs/tools/graphics/barcode/default.nix b/pkgs/tools/graphics/barcode/default.nix
index 9eb368b83af6..6199a87925d3 100644
--- a/pkgs/tools/graphics/barcode/default.nix
+++ b/pkgs/tools/graphics/barcode/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  configureFlags = lib.optional stdenv.isDarwin "ac_cv_func_calloc_0_nonnull=yes";
+  configureFlags = lib.optional stdenv.hostPlatform.isDarwin "ac_cv_func_calloc_0_nonnull=yes";
 
   hardeningDisable = [ "format" ];
 
diff --git a/pkgs/tools/graphics/dcraw/default.nix b/pkgs/tools/graphics/dcraw/default.nix
index 35657cf8fc53..9e35c1bfdc86 100644
--- a/pkgs/tools/graphics/dcraw/default.nix
+++ b/pkgs/tools/graphics/dcraw/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "1fdl3xa1fbm71xzc3760rsjkvf0x5jdjrvdzyg2l9ka24vdc7418";
   };
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin libiconv;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
   buildInputs = [ libjpeg lcms2 gettext ];
 
   # Jasper is disabled because the library is abandoned and has many
diff --git a/pkgs/tools/graphics/dmtx-utils/default.nix b/pkgs/tools/graphics/dmtx-utils/default.nix
index f03f38742e19..4c5883d56804 100644
--- a/pkgs/tools/graphics/dmtx-utils/default.nix
+++ b/pkgs/tools/graphics/dmtx-utils/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
   buildInputs = [ libdmtx imagemagick ]
-    ++ lib.optional stdenv.isDarwin Foundation;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Foundation;
 
   meta = {
     description = "Data matrix command-line utilities";
diff --git a/pkgs/tools/graphics/esshader/default.nix b/pkgs/tools/graphics/esshader/default.nix
index 38bd4d1b7f0a..b425ce5721ce 100644
--- a/pkgs/tools/graphics/esshader/default.nix
+++ b/pkgs/tools/graphics/esshader/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ astro ];
     platforms = lib.platforms.unix;
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "esshader";
   };
 }
diff --git a/pkgs/tools/graphics/feedgnuplot/default.nix b/pkgs/tools/graphics/feedgnuplot/default.nix
index 6503a2887ab2..423d8d8d92f3 100644
--- a/pkgs/tools/graphics/feedgnuplot/default.nix
+++ b/pkgs/tools/graphics/feedgnuplot/default.nix
@@ -30,7 +30,7 @@ perlPackages.buildPerlPackage rec {
 
   outputs = [ "out" ];
 
-  nativeBuildInputs = [ makeWrapper installShellFiles ] ++ lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = [ makeWrapper installShellFiles ] ++ lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
   buildInputs = [ gnuplot perl ]
     ++ (with perlPackages; [ ListMoreUtils IPCRun StringShellQuote ]);
@@ -45,7 +45,7 @@ perlPackages.buildPerlPackage rec {
   # Tests require gnuplot 4.6.4 and are completely skipped with gnuplot 5.
   doCheck = false;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/feedgnuplot
   '' + ''
     wrapProgram $out/bin/feedgnuplot \
diff --git a/pkgs/tools/graphics/gnuplot/default.nix b/pkgs/tools/graphics/gnuplot/default.nix
index 97e566b561d2..c43059c03af5 100644
--- a/pkgs/tools/graphics/gnuplot/default.nix
+++ b/pkgs/tools/graphics/gnuplot/default.nix
@@ -17,7 +17,7 @@
 
 assert libX11 != null -> (fontconfig != null && gnused != null && coreutils != null);
 let
-  withX = libX11 != null && !aquaterm && !stdenv.isDarwin;
+  withX = libX11 != null && !aquaterm && !stdenv.hostPlatform.isDarwin;
 in
 (if withQt then mkDerivation else stdenv.mkDerivation) rec {
   pname = "gnuplot";
@@ -38,7 +38,7 @@ in
     ++ lib.optionals withX [ libX11 libXpm libXt libXaw ]
     ++ lib.optionals withQt [ qtbase qtsvg ]
     ++ lib.optional withWxGTK wxGTK32
-    ++ lib.optional (withWxGTK && stdenv.isDarwin) Cocoa;
+    ++ lib.optional (withWxGTK && stdenv.hostPlatform.isDarwin) Cocoa;
 
   postPatch = ''
     # lrelease is in qttools, not in qtbase.
@@ -51,7 +51,7 @@ in
     (if aquaterm then "--with-aquaterm" else "--without-aquaterm")
   ] ++ lib.optional withCaca "--with-caca";
 
-  CXXFLAGS = lib.optionalString (stdenv.isDarwin && withQt) "-std=c++11";
+  CXXFLAGS = lib.optionalString (stdenv.hostPlatform.isDarwin && withQt) "-std=c++11";
 
   # we'll wrap things ourselves
   dontWrapGApps = true;
diff --git a/pkgs/tools/graphics/graphviz/default.nix b/pkgs/tools/graphics/graphviz/default.nix
index 5cb3c24bc150..e27c35fd72c7 100644
--- a/pkgs/tools/graphics/graphviz/default.nix
+++ b/pkgs/tools/graphics/graphviz/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
     pango
     bash
   ] ++ optionals withXorg (with xorg; [ libXrender libXaw libXpm ])
-  ++ optionals stdenv.isDarwin [ ApplicationServices Foundation ];
+  ++ optionals stdenv.hostPlatform.isDarwin [ ApplicationServices Foundation ];
 
   hardeningDisable = [ "fortify" ];
 
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  CPPFLAGS = optionalString (withXorg && stdenv.isDarwin)
+  CPPFLAGS = optionalString (withXorg && stdenv.hostPlatform.isDarwin)
     "-I${cairo.dev}/include/cairo";
 
   doCheck = false; # fails with "Graphviz test suite requires ksh93" which is not in nixpkgs
diff --git a/pkgs/tools/graphics/icoutils/default.nix b/pkgs/tools/graphics/icoutils/default.nix
index 0e22fe72c594..8c50ffdce62e 100644
--- a/pkgs/tools/graphics/icoutils/default.nix
+++ b/pkgs/tools/graphics/icoutils/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
 
   # Fixes a build failure on aarch64-darwin. Define for all Darwin targets for when x86_64-darwin
   # upgrades to a newer SDK.
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-DTARGET_OS_IPHONE=0";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-DTARGET_OS_IPHONE=0";
 
   postPatch = ''
     patchShebangs extresso/extresso
diff --git a/pkgs/tools/graphics/lepton/default.nix b/pkgs/tools/graphics/lepton/default.nix
index 27fcca3cacbf..980f729e9725 100644
--- a/pkgs/tools/graphics/lepton/default.nix
+++ b/pkgs/tools/graphics/lepton/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake git ];
-  buildInputs = lib.optionals stdenv.isLinux [ glibc.static ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ glibc.static ];
 
   meta = with lib; {
     homepage = "https://github.com/dropbox/lepton";
diff --git a/pkgs/tools/graphics/mesa-demos/default.nix b/pkgs/tools/graphics/mesa-demos/default.nix
index 02cb25d251da..3ac1ede77eac 100644
--- a/pkgs/tools/graphics/mesa-demos/default.nix
+++ b/pkgs/tools/graphics/mesa-demos/default.nix
@@ -55,8 +55,8 @@ stdenv.mkDerivation rec {
   ];
 
   mesonFlags = [
-    "-Degl=${if stdenv.isDarwin then "disabled" else "auto"}"
-    (lib.mesonEnable "libdrm" (stdenv.isLinux))
+    "-Degl=${if stdenv.hostPlatform.isDarwin then "disabled" else "auto"}"
+    (lib.mesonEnable "libdrm" (stdenv.hostPlatform.isLinux))
     (lib.mesonEnable "osmesa" false)
     (lib.mesonEnable "wayland" (lib.meta.availableOn stdenv.hostPlatform wayland))
   ];
diff --git a/pkgs/tools/graphics/netpbm/default.nix b/pkgs/tools/graphics/netpbm/default.nix
index bbd24d056bdb..8426fbcc2032 100644
--- a/pkgs/tools/graphics/netpbm/default.nix
+++ b/pkgs/tools/graphics/netpbm/default.nix
@@ -87,7 +87,7 @@ stdenv.mkDerivation {
 
     # Fix path to rgb.txt
     echo "RGB_DB_PATH = $out/share/netpbm/misc/rgb.txt" >> config.mk
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     echo "LDSHLIB=-dynamiclib -install_name $out/lib/libnetpbm.\$(MAJ).dylib" >> config.mk
     echo "NETPBMLIBTYPE = dylib" >> config.mk
     echo "NETPBMLIBSUFFIX = dylib" >> config.mk
diff --git a/pkgs/tools/graphics/nifskope/default.nix b/pkgs/tools/graphics/nifskope/default.nix
index 3d9d89af0c96..4022c363ef64 100644
--- a/pkgs/tools/graphics/nifskope/default.nix
+++ b/pkgs/tools/graphics/nifskope/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
       url = "https://github.com/niftools/nifskope/commit/30954e7f01f3d779a2a1fd37d363e8a6ad560bd3.patch";
       sha256 = "0d6xjj2mjjhdd7w1aig5f75jksjni16jyj0lxsz51pys6xqb6fpj";
     })
-  ] ++ (lib.optional stdenv.isAarch64 ./no-sse-on-arm.patch);
+  ] ++ (lib.optional stdenv.hostPlatform.isAarch64 ./no-sse-on-arm.patch);
 
   buildInputs = [ qtbase qttools libGLU ];
   nativeBuildInputs = [ qmake wrapQtAppsHook ];
diff --git a/pkgs/tools/graphics/oxipng/default.nix b/pkgs/tools/graphics/oxipng/default.nix
index e127e2a3aa3c..d0715d8f1aa3 100644
--- a/pkgs/tools/graphics/oxipng/default.nix
+++ b/pkgs/tools/graphics/oxipng/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-LZ3YIosDpjDYVACWQsr/0XhgX4fyo8CyZG58WfLSzCs=";
 
-  doCheck = !stdenv.isAarch64 && !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isAarch64 && !stdenv.hostPlatform.isDarwin;
 
   meta = {
     homepage = "https://github.com/shssoichiro/oxipng";
diff --git a/pkgs/tools/graphics/pfstools/default.nix b/pkgs/tools/graphics/pfstools/default.nix
index 7d595c5e4ce1..b164799e9cc2 100644
--- a/pkgs/tools/graphics/pfstools/default.nix
+++ b/pkgs/tools/graphics/pfstools/default.nix
@@ -32,7 +32,7 @@ mkDerivation rec {
   buildInputs = [
     openexr zlib imagemagick6 fftwFloat
     fftw gsl libexif perl qtbase netpbm
-  ] ++ (if stdenv.isDarwin then (with darwin.apple_sdk.frameworks; [
+  ] ++ (if stdenv.hostPlatform.isDarwin then (with darwin.apple_sdk.frameworks; [
     OpenGL GLUT
   ]) else [
     libGLU libGL libglut
diff --git a/pkgs/tools/graphics/pngout/default.nix b/pkgs/tools/graphics/pngout/default.nix
index 41724043930c..03d25acd2986 100644
--- a/pkgs/tools/graphics/pngout/default.nix
+++ b/pkgs/tools/graphics/pngout/default.nix
@@ -14,7 +14,7 @@ let
   };
   platform = platforms."${stdenv.hostPlatform.system}"
     or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
-  download = if stdenv.isDarwin
+  download = if stdenv.hostPlatform.isDarwin
     then { extension = "macos.zip"; hash = "sha256-MnL6lH7q/BrACG4fFJNfnvoh0JClVeaJIlX+XIj2aG4="; }
     else { extension = "linux.tar.gz"; hash = "sha256-rDi7pvDeKQM96GZTjDr6ZDQTGbaVu+OI77xf2egw6Sg="; };
 in
@@ -27,15 +27,15 @@ stdenv.mkDerivation rec {
     url = "http://static.jonof.id.au/dl/kenutils/pngout-${version}-${download.extension}";
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ unzip ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ unzip ];
 
   # pngout is code-signed on Darwin, so don’t alter the binary to avoid breaking the signature.
-  dontFixup = stdenv.isDarwin;
+  dontFixup = stdenv.hostPlatform.isDarwin;
 
   installPhase = ''
     mkdir -p $out/bin
     cp ${platform.folder}/pngout $out/bin
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --set-interpreter ${stdenv.cc.libc}/lib/${platform.ld-linux} $out/bin/pngout
   '';
 
diff --git a/pkgs/tools/graphics/pstoedit/default.nix b/pkgs/tools/graphics/pstoedit/default.nix
index 810c2365b2c3..c9e8512b7755 100644
--- a/pkgs/tools/graphics/pstoedit/default.nix
+++ b/pkgs/tools/graphics/pstoedit/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ];
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ zlib ghostscript imagemagick plotutils gd libjpeg libwebp ]
-  ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     libiconv ApplicationServices
   ]);
 
diff --git a/pkgs/tools/graphics/quirc/default.nix b/pkgs/tools/graphics/quirc/default.nix
index b2d1e795155a..43144ce037b0 100644
--- a/pkgs/tools/graphics/quirc/default.nix
+++ b/pkgs/tools/graphics/quirc/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation (finalAttrs: {
       url = "https://github.com/dlbeer/quirc/commit/257c6c94d99960819ecabf72199e5822f60a3bc5.patch?full_index=1";
       hash = "sha256-WLQK7vy34VmgJzppTnRjAcZoSGWVaXQSaGq9An8W0rw=";
     })
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # Disable building of linux-only demos on darwin systems
     ./0001-Don-t-build-demos.patch
   ];
@@ -50,7 +50,7 @@ stdenv.mkDerivation (finalAttrs: {
   postInstall = ''
     # don't install static library
     rm $out/lib/libquirc.a
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Set absolute install name to avoid the need for DYLD_LIBRARY_PATH
     dylib=$out/lib/libquirc.${finalAttrs.version}.dylib
     ${stdenv.cc.targetPrefix}install_name_tool -id "$dylib" "$dylib"
diff --git a/pkgs/tools/graphics/realesrgan-ncnn-vulkan/default.nix b/pkgs/tools/graphics/realesrgan-ncnn-vulkan/default.nix
index 59c2753011d3..450e36e6d3ee 100644
--- a/pkgs/tools/graphics/realesrgan-ncnn-vulkan/default.nix
+++ b/pkgs/tools/graphics/realesrgan-ncnn-vulkan/default.nix
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     cp -r ${models}/models $out/share
   '';
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/realesrgan-ncnn-vulkan --add-needed libvulkan.so
   '';
 
diff --git a/pkgs/tools/graphics/texture-synthesis/default.nix b/pkgs/tools/graphics/texture-synthesis/default.nix
index 7122450587a7..cd7d437c4d41 100644
--- a/pkgs/tools/graphics/texture-synthesis/default.nix
+++ b/pkgs/tools/graphics/texture-synthesis/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   # tests fail for unknown reasons on aarch64-darwin
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64);
 
   meta = with lib; {
     description = "Example-based texture synthesis written in Rust";
diff --git a/pkgs/tools/graphics/vips/default.nix b/pkgs/tools/graphics/vips/default.nix
index 129b33427bc3..c8f41167f865 100644
--- a/pkgs/tools/graphics/vips/default.nix
+++ b/pkgs/tools/graphics/vips/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation (finalAttrs: {
   pname = "vips";
   version = "8.15.3";
 
-  outputs = [ "bin" "out" "man" "dev" ] ++ lib.optionals (!stdenv.isDarwin) [ "devdoc" ];
+  outputs = [ "bin" "out" "man" "dev" ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ "devdoc" ];
 
   src = fetchFromGitHub {
     owner = "libvips";
@@ -64,7 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
     ninja
     docbook-xsl-nons
     gobject-introspection
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     gtk-doc
   ];
 
@@ -96,7 +96,7 @@ stdenv.mkDerivation (finalAttrs: {
     cgif
     libarchive
     libhwy
-  ] ++ lib.optionals stdenv.isDarwin [ ApplicationServices Foundation ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ ApplicationServices Foundation ];
 
   # Required by .pc file
   propagatedBuildInputs = [
@@ -107,7 +107,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-Dpdfium=disabled"
     "-Dnifti=disabled"
   ]
-  ++ lib.optional (!stdenv.isDarwin) "-Dgtk_doc=true"
+  ++ lib.optional (!stdenv.hostPlatform.isDarwin) "-Dgtk_doc=true"
   ++ lib.optional (imagemagick == null) "-Dmagick=disabled"
   ;
 
diff --git a/pkgs/tools/graphics/vulkan-caps-viewer/default.nix b/pkgs/tools/graphics/vulkan-caps-viewer/default.nix
index 0c60a11db88b..da52cb1b6ea9 100644
--- a/pkgs/tools/graphics/vulkan-caps-viewer/default.nix
+++ b/pkgs/tools/graphics/vulkan-caps-viewer/default.nix
@@ -58,6 +58,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ pedrohlc ];
     changelog = "https://github.com/SaschaWillems/VulkanCapsViewer/releases/tag/${version}";
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/graphics/vulkan-tools/default.nix b/pkgs/tools/graphics/vulkan-tools/default.nix
index 759841d02e66..c21ece529459 100644
--- a/pkgs/tools/graphics/vulkan-tools/default.nix
+++ b/pkgs/tools/graphics/vulkan-tools/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     vulkan-headers
     vulkan-loader
     vulkan-volk
-  ] ++ lib.optionals (!stdenv.isDarwin) [
+  ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     libffi
     libX11
     libXau
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     wayland
     wayland-protocols
     wayland-scanner
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     moltenvk
     moltenvk.dev
     AppKit
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
     "-DGLSLANG_INSTALL_DIR=${glslang}"
     # Hide dev warnings that are useless for packaging
     "-Wno-dev"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DMOLTENVK_REPO_ROOT=${moltenvk}/share/vulkan/icd.d"
     # Don’t build the cube demo because it requires `ibtool`, which is not available in nixpkgs.
     "-DBUILD_CUBE=OFF"
diff --git a/pkgs/tools/graphics/waifu2x-converter-cpp/default.nix b/pkgs/tools/graphics/waifu2x-converter-cpp/default.nix
index dd2c15c8fda4..cf150a59c8db 100644
--- a/pkgs/tools/graphics/waifu2x-converter-cpp/default.nix
+++ b/pkgs/tools/graphics/waifu2x-converter-cpp/default.nix
@@ -22,12 +22,12 @@ stdenv.mkDerivation rec {
   buildInputs = [
     opencv4
   ] ++ lib.optional cudaSupport cudatoolkit
-    ++ lib.optional stdenv.isDarwin OpenCL
-    ++ lib.optionals stdenv.isLinux [ ocl-icd opencl-headers ];
+    ++ lib.optional stdenv.hostPlatform.isDarwin OpenCL
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ ocl-icd opencl-headers ];
 
   nativeBuildInputs = [ cmake makeWrapper ];
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/waifu2x-converter-cpp --prefix LD_LIBRARY_PATH : "${ocl-icd}/lib"
   '';
 
diff --git a/pkgs/tools/graphics/wgpu-utils/default.nix b/pkgs/tools/graphics/wgpu-utils/default.nix
index 236cf3f7a7fa..51d4c018e459 100644
--- a/pkgs/tools/graphics/wgpu-utils/default.nix
+++ b/pkgs/tools/graphics/wgpu-utils/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
     makeWrapper
   ];
 
-  buildInputs = lib.optional stdenv.isDarwin QuartzCore;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin QuartzCore;
 
   # Tests fail, as the Nix sandbox doesn't provide an appropriate adapter (e.g. Vulkan).
   doCheck = false;
diff --git a/pkgs/tools/graphics/zbar/default.nix b/pkgs/tools/graphics/zbar/default.nix
index c3429069d203..951e6b26bf11 100644
--- a/pkgs/tools/graphics/zbar/default.nix
+++ b/pkgs/tools/graphics/zbar/default.nix
@@ -16,7 +16,7 @@
 , docbook_xsl
 , autoreconfHook
 , dbus
-, enableVideo ? stdenv.isLinux
+, enableVideo ? stdenv.hostPlatform.isLinux
   # The implementation is buggy and produces an error like
   # Name Error (Connection ":1.4380" is not allowed to own the service "org.linuxtv.Zbar" due to security policies in the configuration file)
   # for every scanned code.
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     imagemagickBig
     libintl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     Foundation
   ] ++ lib.optionals enableDbus [
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
     python3
   ];
 
-  checkInputs = lib.optionals stdenv.isDarwin [
+  checkInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     argp-standalone
   ];
 
@@ -119,7 +119,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export NIX_LDFLAGS="$NIX_LDFLAGS -largp"
   '';
 
diff --git a/pkgs/tools/misc/abduco/default.nix b/pkgs/tools/misc/abduco/default.nix
index 011f186bbbe2..eef5fe0df344 100644
--- a/pkgs/tools/misc/abduco/default.nix
+++ b/pkgs/tools/misc/abduco/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
     "cp ${writeText "config.def.h" conf} config.def.h";
 
   installFlags = [ "install-completion" ];
-  CFLAGS = lib.optionalString stdenv.isDarwin "-D_DARWIN_C_SOURCE";
+  CFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-D_DARWIN_C_SOURCE";
 
   patches = [
     # https://github.com/martanne/abduco/pull/22
diff --git a/pkgs/tools/misc/aescrypt/default.nix b/pkgs/tools/misc/aescrypt/default.nix
index 67739f575169..2517724c8c39 100644
--- a/pkgs/tools/misc/aescrypt/default.nix
+++ b/pkgs/tools/misc/aescrypt/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-4uGS0LReq5dI7+Wel7ZWzFXx+utZWi93q4TUSw7AhNI=";
   };
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-liconv";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-liconv";
 
   preBuild = ''
     substituteInPlace src/Makefile --replace "CC=gcc" "CC?=gcc"
diff --git a/pkgs/tools/misc/aichat/default.nix b/pkgs/tools/misc/aichat/default.nix
index 6aed08780987..bea3026ea606 100644
--- a/pkgs/tools/misc/aichat/default.nix
+++ b/pkgs/tools/misc/aichat/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
diff --git a/pkgs/tools/misc/aoc-cli/default.nix b/pkgs/tools/misc/aoc-cli/default.nix
index 4fec5647e04d..693f87389e1b 100644
--- a/pkgs/tools/misc/aoc-cli/default.nix
+++ b/pkgs/tools/misc/aoc-cli/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   cargoHash = "sha256-EluP4N3UBQeEKVdHTs4O0THXji+nAyE52nGKsxA3AA4=";
 
diff --git a/pkgs/tools/misc/apkeep/default.nix b/pkgs/tools/misc/apkeep/default.nix
index 084997765868..8e31710ff324 100644
--- a/pkgs/tools/misc/apkeep/default.nix
+++ b/pkgs/tools/misc/apkeep/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/tools/misc/archi/default.nix b/pkgs/tools/misc/archi/default.nix
index e933edf3642b..7afbce58c106 100644
--- a/pkgs/tools/misc/archi/default.nix
+++ b/pkgs/tools/misc/archi/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     autoPatchelfHook
   ];
 
-  sourceRoot = if stdenv.isDarwin then "." else null;
+  sourceRoot = if stdenv.hostPlatform.isDarwin then "." else null;
 
   installPhase =
     if stdenv.hostPlatform.system == "x86_64-linux" then
diff --git a/pkgs/tools/misc/asciinema-agg/default.nix b/pkgs/tools/misc/asciinema-agg/default.nix
index 238a5c8af073..e7f7334de3e0 100644
--- a/pkgs/tools/misc/asciinema-agg/default.nix
+++ b/pkgs/tools/misc/asciinema-agg/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/misc/barman/default.nix b/pkgs/tools/misc/barman/default.nix
index 20bdb11d0179..7e1eea61d0a9 100644
--- a/pkgs/tools/misc/barman/default.nix
+++ b/pkgs/tools/misc/barman/default.nix
@@ -48,7 +48,7 @@ python3Packages.buildPythonApplication rec {
       # Assertion error
       "test_help_output"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # FsOperationFailed
       "test_get_file_mode"
     ];
diff --git a/pkgs/tools/misc/bat-extras/default.nix b/pkgs/tools/misc/bat-extras/default.nix
index 1c3a805367f2..0891499b2261 100644
--- a/pkgs/tools/misc/bat-extras/default.nix
+++ b/pkgs/tools/misc/bat-extras/default.nix
@@ -55,7 +55,7 @@ let
 
     # Run the library tests as they don't have external dependencies
     doCheck = true;
-    nativeCheckInputs = [ bash fish zsh ] ++ (lib.optionals stdenv.isDarwin [ getconf ]);
+    nativeCheckInputs = [ bash fish zsh ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [ getconf ]);
     checkPhase = ''
       runHook preCheck
       # test list repeats suites. Unique them
@@ -112,7 +112,7 @@ let
       dontBuild = true; # we've already built
 
       doCheck = true;
-      nativeCheckInputs = [ bat bash fish zsh ] ++ (lib.optionals stdenv.isDarwin [ getconf ]);
+      nativeCheckInputs = [ bat bash fish zsh ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [ getconf ]);
       checkPhase = ''
         runHook preCheck
         bash ./test.sh --compiled --suite ${name}
@@ -144,7 +144,7 @@ in
 {
   batdiff = script "batdiff" ([ less coreutils gitMinimal ] ++ optionalDep withDelta delta);
   batgrep = script "batgrep" [ less coreutils ripgrep ];
-  batman = script "batman" (lib.optionals stdenv.isLinux [ util-linux ]);
+  batman = script "batman" (lib.optionals stdenv.hostPlatform.isLinux [ util-linux ]);
   batpipe = script "batpipe" [ less ];
   batwatch = script "batwatch" ([ less coreutils ] ++ optionalDep withEntr entr);
   prettybat = script "prettybat" ([]
diff --git a/pkgs/tools/misc/bibutils/default.nix b/pkgs/tools/misc/bibutils/default.nix
index ea5360549b20..c6dd28777b4d 100644
--- a/pkgs/tools/misc/bibutils/default.nix
+++ b/pkgs/tools/misc/bibutils/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-bgKK7x6Kaz5azvCYWEp7tocI81z+dAEbNBwR/qXktcM=";
   };
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace lib/Makefile.dynamic \
       --replace '-Wl,-soname,$(SONAME)' ""
   '';
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
   checkTarget = "test";
-  preCheck = lib.optionalString stdenv.isDarwin ''
+  preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export DYLD_LIBRARY_PATH=`pwd`/lib
   '';
 
diff --git a/pkgs/tools/misc/bmon/default.nix b/pkgs/tools/misc/bmon/default.nix
index 237eb7476da5..a123a3380f1b 100644
--- a/pkgs/tools/misc/bmon/default.nix
+++ b/pkgs/tools/misc/bmon/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
 
-  buildInputs = [ ncurses libconfuse ] ++ lib.optional stdenv.isLinux libnl;
+  buildInputs = [ ncurses libconfuse ] ++ lib.optional stdenv.hostPlatform.isLinux libnl;
 
   preConfigure = ''
     # Must be an absolute path
diff --git a/pkgs/tools/misc/boxxy/default.nix b/pkgs/tools/misc/boxxy/default.nix
index b2596746f7df..845ccf532b8e 100644
--- a/pkgs/tools/misc/boxxy/default.nix
+++ b/pkgs/tools/misc/boxxy/default.nix
@@ -37,7 +37,7 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [ dit7ya figsoda ];
     platforms = platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
     mainProgram = "boxxy";
   };
 }
diff --git a/pkgs/tools/misc/brltty/default.nix b/pkgs/tools/misc/brltty/default.nix
index f2de104c5825..745f39b4363a 100644
--- a/pkgs/tools/misc/brltty/default.nix
+++ b/pkgs/tools/misc/brltty/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl, pkg-config, python3, bluez
 , tcl, acl, kmod, coreutils, shadow, util-linux
-, alsaSupport ? stdenv.isLinux, alsa-lib
+, alsaSupport ? stdenv.hostPlatform.isLinux, alsa-lib
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
 }:
 
diff --git a/pkgs/tools/misc/broot/default.nix b/pkgs/tools/misc/broot/default.nix
index 9097f4e335ec..17c28c8f3bdd 100644
--- a/pkgs/tools/misc/broot/default.nix
+++ b/pkgs/tools/misc/broot/default.nix
@@ -13,8 +13,8 @@
 , xorg
 , zlib
 , buildPackages
-, withClipboard ? !stdenv.isDarwin
-, withTrash ? !stdenv.isDarwin
+, withClipboard ? !stdenv.hostPlatform.isDarwin
+, withTrash ? !stdenv.hostPlatform.isDarwin
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ];
 
-  buildInputs = [ libgit2 oniguruma xorg.libxcb ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ libgit2 oniguruma xorg.libxcb ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Foundation
     libiconv
     Security
diff --git a/pkgs/tools/misc/chafa/default.nix b/pkgs/tools/misc/chafa/default.nix
index 6272fdc8914d..a6a376abd930 100644
--- a/pkgs/tools/misc/chafa/default.nix
+++ b/pkgs/tools/misc/chafa/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
                       ];
 
   buildInputs = [ glib imagemagick ]
-    ++ lib.optional stdenv.isDarwin Foundation;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Foundation;
 
   patches = [ ./xmlcatalog_patch.patch ];
 
diff --git a/pkgs/tools/misc/checkpwn/default.nix b/pkgs/tools/misc/checkpwn/default.nix
index 994fecc6c4db..e89e6b880097 100644
--- a/pkgs/tools/misc/checkpwn/default.nix
+++ b/pkgs/tools/misc/checkpwn/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-G+QWnGf+Zp94EHVnYM3Q/iEhEQMU2O/c4i5ya/dY7K4=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/misc/ckb-next/default.nix b/pkgs/tools/misc/ckb-next/default.nix
index ca0f6705b9fe..6c077b227274 100644
--- a/pkgs/tools/misc/ckb-next/default.nix
+++ b/pkgs/tools/misc/ckb-next/default.nix
@@ -1,6 +1,6 @@
 { lib, wrapQtAppsHook, fetchFromGitHub, substituteAll, udev, stdenv
 , pkg-config, qtbase, cmake, zlib, kmod, libXdmcp, qttools, qtx11extras, libdbusmenu, gnused
-, withPulseaudio ? stdenv.isLinux, libpulseaudio, quazip
+, withPulseaudio ? stdenv.hostPlatform.isLinux, libpulseaudio, quazip
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/misc/clipboard-jh/default.nix b/pkgs/tools/misc/clipboard-jh/default.nix
index 78ba8e6c3ba7..9b0369e8fad2 100644
--- a/pkgs/tools/misc/clipboard-jh/default.nix
+++ b/pkgs/tools/misc/clipboard-jh/default.nix
@@ -34,13 +34,13 @@ stdenv.mkDerivation rec {
     wayland-scanner
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libffi
     wayland-protocols
     wayland
     xorg.libX11
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
   ];
 
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     "-DINSTALL_PREFIX=${placeholder "out"}"
   ];
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf $out/bin/cb --add-rpath $out/lib
   '';
 
diff --git a/pkgs/tools/misc/cod/default.nix b/pkgs/tools/misc/cod/default.nix
index eba78d6c2263..08ea681eedb8 100644
--- a/pkgs/tools/misc/cod/default.nix
+++ b/pkgs/tools/misc/cod/default.nix
@@ -33,7 +33,7 @@ buildGoModule rec {
     homepage = "https://github.com/dim-an/cod/";
     license = licenses.asl20;
     maintainers = with maintainers; [ SuperSandro2000 ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "cod";
   };
 }
diff --git a/pkgs/tools/misc/code-minimap/default.nix b/pkgs/tools/misc/code-minimap/default.nix
index db58ede25abf..2bc64b425e5f 100644
--- a/pkgs/tools/misc/code-minimap/default.nix
+++ b/pkgs/tools/misc/code-minimap/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-5/UgEzkJw9XDgtS1jKyWh5ijTp3L+UQLuE5CXcyIgTs=";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   meta = with lib; {
     description = "High performance code minimap render";
diff --git a/pkgs/tools/misc/coinlive/default.nix b/pkgs/tools/misc/coinlive/default.nix
index 2db008551c8b..564f19f85b97 100644
--- a/pkgs/tools/misc/coinlive/default.nix
+++ b/pkgs/tools/misc/coinlive/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/misc/convbin/default.nix b/pkgs/tools/misc/convbin/default.nix
index 96164902dc2c..7d61c684f9cb 100644
--- a/pkgs/tools/misc/convbin/default.nix
+++ b/pkgs/tools/misc/convbin/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-zCRM62xwaPaN8+cg+CeaqK/9hKpZmSBBeUOQqAvQGYw=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace "-flto" ""
   '';
 
diff --git a/pkgs/tools/misc/coreutils/default.nix b/pkgs/tools/misc/coreutils/default.nix
index d9fbd4459f04..5bbc3b9581ee 100644
--- a/pkgs/tools/misc/coreutils/default.nix
+++ b/pkgs/tools/misc/coreutils/default.nix
@@ -98,7 +98,7 @@ stdenv.mkDerivation rec {
       echo "int main() { return 77; }" > gnulib-tests/test-parse-datetime.c
       echo "int main() { return 77; }" > gnulib-tests/test-getlogin.c
     ''
-  ])) + (optionalString stdenv.isAarch64 ''
+  ])) + (optionalString stdenv.hostPlatform.isAarch64 ''
     # Sometimes fails: https://github.com/NixOS/nixpkgs/pull/143097#issuecomment-954462584
     sed '2i echo Skipping cut huge range test && exit 77' -i ./tests/cut/cut-huge-range.sh
   '');
@@ -135,7 +135,7 @@ stdenv.mkDerivation rec {
     ++ optional withPrefix "--program-prefix=g"
     # the shipped configure script doesn't enable nls, but using autoreconfHook
     # does so which breaks the build
-    ++ optional stdenv.isDarwin "--disable-nls"
+    ++ optional stdenv.hostPlatform.isDarwin "--disable-nls"
     ++ optionals (isCross && stdenv.hostPlatform.libc == "glibc") [
       # TODO(19b98110126fde7cbb1127af7e3fe1568eacad3d): Needed for fstatfs() I
       # don't know why it is not properly detected cross building with glibc.
@@ -154,7 +154,7 @@ stdenv.mkDerivation rec {
   # With non-standard storeDir: https://github.com/NixOS/nix/issues/512
   doCheck = (!isCross)
     && (stdenv.hostPlatform.libc == "glibc" || stdenv.hostPlatform.libc == "musl")
-    && !stdenv.isAarch32;
+    && !stdenv.hostPlatform.isAarch32;
 
   # Prevents attempts of running 'help2man' on cross-built binaries.
   PERL = if isCross then "missing" else null;
diff --git a/pkgs/tools/misc/cutecom/default.nix b/pkgs/tools/misc/cutecom/default.nix
index e36bd288b2ae..9ed7ef6295e6 100644
--- a/pkgs/tools/misc/cutecom/default.nix
+++ b/pkgs/tools/misc/cutecom/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ qtserialport ];
   nativeBuildInputs = [ cmake wrapQtAppsHook ];
 
-  postInstall = if stdenv.isDarwin then ''
+  postInstall = if stdenv.hostPlatform.isDarwin then ''
     mkdir -p $out/Applications
   '' else ''
     cd ..
diff --git a/pkgs/tools/misc/daktilo/default.nix b/pkgs/tools/misc/daktilo/default.nix
index e557862b6713..3d9b4161e299 100644
--- a/pkgs/tools/misc/daktilo/default.nix
+++ b/pkgs/tools/misc/daktilo/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     xorg.libX11
     xorg.libXi
     xorg.libXtst
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/misc/dialogbox/default.nix b/pkgs/tools/misc/dialogbox/default.nix
index 7012f9d69ad5..e6849fa84310 100644
--- a/pkgs/tools/misc/dialogbox/default.nix
+++ b/pkgs/tools/misc/dialogbox/default.nix
@@ -37,7 +37,7 @@ mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/martynets/dialogbox/";
     description = "Qt-based scriptable engine providing GUI dialog boxes";
     license = licenses.gpl3Plus;
diff --git a/pkgs/tools/misc/didyoumean/default.nix b/pkgs/tools/misc/didyoumean/default.nix
index 362673a5ca82..94efc1af33db 100644
--- a/pkgs/tools/misc/didyoumean/default.nix
+++ b/pkgs/tools/misc/didyoumean/default.nix
@@ -25,14 +25,14 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     installShellFiles
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     libxcb
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
   ];
 
diff --git a/pkgs/tools/misc/diffoscope/default.nix b/pkgs/tools/misc/diffoscope/default.nix
index f76b7a766e77..96d8976922bd 100644
--- a/pkgs/tools/misc/diffoscope/default.nix
+++ b/pkgs/tools/misc/diffoscope/default.nix
@@ -245,7 +245,7 @@ python.pkgs.buildPythonApplication rec {
         # docx2txt, nixpkgs packages another project named the same, which does not work
       ])
       # oggvideotools is broken on Darwin, please put it back when it will be fixed?
-      ++ lib.optionals stdenv.isLinux [ oggvideotools ]
+      ++ lib.optionals stdenv.hostPlatform.isLinux [ oggvideotools ]
       # This doesn't work on aarch64-darwin
       ++ lib.optionals (stdenv.hostPlatform.system != "aarch64-darwin") [ gnumeric ]
     )
@@ -272,7 +272,7 @@ python.pkgs.buildPythonApplication rec {
       # Fails because it fails to determine llvm version
       "test_item3_deflate_llvm_bitcode"
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Disable flaky tests on Darwin
       "test_non_unicode_filename"
       "test_listing"
@@ -288,7 +288,7 @@ python.pkgs.buildPythonApplication rec {
       "test_libmix_differences"
     ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     "tests/comparators/test_git.py"
     "tests/comparators/test_java.py"
     "tests/comparators/test_uimage.py"
diff --git a/pkgs/tools/misc/dijo/default.nix b/pkgs/tools/misc/dijo/default.nix
index 1a73a4d84faf..344faf84f60b 100644
--- a/pkgs/tools/misc/dijo/default.nix
+++ b/pkgs/tools/misc/dijo/default.nix
@@ -3,7 +3,7 @@
 rustPlatform.buildRustPackage rec {
   pname = "dijo";
   version = "0.2.7";
-  buildInputs = [ ncurses ] ++ lib.optional stdenv.isDarwin CoreServices;
+  buildInputs = [ ncurses ] ++ lib.optional stdenv.hostPlatform.isDarwin CoreServices;
   src = fetchFromGitHub {
     owner = "NerdyPepper";
     repo = "dijo";
diff --git a/pkgs/tools/misc/diskonaut/default.nix b/pkgs/tools/misc/diskonaut/default.nix
index d9738b398b04..fa9d7f00a83b 100644
--- a/pkgs/tools/misc/diskonaut/default.nix
+++ b/pkgs/tools/misc/diskonaut/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-S/ne3iTEnlA3AqcPg3geLzV4bYVuYPjMCITSVJFnWYI=";
 
   # 1 passed; 44 failed https://hydra.nixos.org/build/148943783/nixlog/1
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Terminal disk space navigator";
diff --git a/pkgs/tools/misc/diskus/default.nix b/pkgs/tools/misc/diskus/default.nix
index fd37b2b9c99b..683da47d6af6 100644
--- a/pkgs/tools/misc/diskus/default.nix
+++ b/pkgs/tools/misc/diskus/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-SKd2CU0F2iR4bSHntu2VKvZyjjf2XJeXJG6XS/fIBMU=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoHash = "sha256-qNXv6Z9sKl7rol78UTOSRFML/JCGfOJMGOdt49KHD50=";
 
diff --git a/pkgs/tools/misc/docui/default.nix b/pkgs/tools/misc/docui/default.nix
index d226c2fc8f00..a42e57ebc5ae 100644
--- a/pkgs/tools/misc/docui/default.nix
+++ b/pkgs/tools/misc/docui/default.nix
@@ -18,7 +18,7 @@ buildGoModule rec {
     homepage = "https://github.com/skanehira/docui";
     license = licenses.mit;
     maintainers = with maintainers; [ aethelz ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "docui";
   };
 }
diff --git a/pkgs/tools/misc/dtool/default.nix b/pkgs/tools/misc/dtool/default.nix
index 8b4349dbb59a..0e62d91cdbc9 100644
--- a/pkgs/tools/misc/dtool/default.nix
+++ b/pkgs/tools/misc/dtool/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-o5Xvc0tnoUgfp5k7EqVuEH9Zyo3C+A+mVqPhMtZCYKw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
   # FIXME: remove patch when upstream version of rustc-serialize is updated
diff --git a/pkgs/tools/misc/dua/default.nix b/pkgs/tools/misc/dua/default.nix
index 130a21d0709a..aed4b2d53c88 100644
--- a/pkgs/tools/misc/dua/default.nix
+++ b/pkgs/tools/misc/dua/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-bqWYXcry+mCUNgYS+7+MWfiV+u+3oZZg1o3Q6Mac+vE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Foundation
   ];
 
diff --git a/pkgs/tools/misc/duc/default.nix b/pkgs/tools/misc/duc/default.nix
index 56fe697528ab..8ef860f32e05 100644
--- a/pkgs/tools/misc/duc/default.nix
+++ b/pkgs/tools/misc/duc/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config
 , tokyocabinet, ncurses
 , cairo ? null, pango ? null
-, enableCairo ? stdenv.isLinux
+, enableCairo ? stdenv.hostPlatform.isLinux
 }:
 
 assert enableCairo -> cairo != null && pango != null;
diff --git a/pkgs/tools/misc/dvtm/dvtm.nix b/pkgs/tools/misc/dvtm/dvtm.nix
index aedac2d61f98..f4e36f271bab 100644
--- a/pkgs/tools/misc/dvtm/dvtm.nix
+++ b/pkgs/tools/misc/dvtm/dvtm.nix
@@ -3,7 +3,7 @@ stdenv.mkDerivation {
 
   inherit pname version src patches;
 
-  CFLAGS = lib.optionalString stdenv.isDarwin "-D_DARWIN_C_SOURCE";
+  CFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-D_DARWIN_C_SOURCE";
 
   postPatch = lib.optionalString (customConfig != null) ''
     cp ${builtins.toFile "config.h" customConfig} ./config.h
diff --git a/pkgs/tools/misc/ea/default.nix b/pkgs/tools/misc/ea/default.nix
index d45f3b431dcd..7ea3b5c11ca8 100644
--- a/pkgs/tools/misc/ea/default.nix
+++ b/pkgs/tools/misc/ea/default.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
diff --git a/pkgs/tools/misc/edid-generator/default.nix b/pkgs/tools/misc/edid-generator/default.nix
index fc7f01226972..e3855fc76f2f 100644
--- a/pkgs/tools/misc/edid-generator/default.nix
+++ b/pkgs/tools/misc/edid-generator/default.nix
@@ -74,6 +74,6 @@ stdenv.mkDerivation {
     license = lib.licenses.gpl3;
     maintainers = with lib.maintainers; [ flokli nazarewk ];
     platforms = lib.platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/edid-generator.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/edid-generator.x86_64-darwin
   };
 }
diff --git a/pkgs/tools/misc/edk2-uefi-shell/default.nix b/pkgs/tools/misc/edk2-uefi-shell/default.nix
index 0ec010472645..723833ab45cf 100644
--- a/pkgs/tools/misc/edk2-uefi-shell/default.nix
+++ b/pkgs/tools/misc/edk2-uefi-shell/default.nix
@@ -38,6 +38,6 @@ edk2.mkDerivation "ShellPkg/ShellPkg.dsc" (finalAttrs: {
     description = "UEFI Shell from Tianocore EFI development kit";
     homepage = "https://github.com/tianocore/tianocore.github.io/wiki/ShellPkg";
     maintainers = with lib.maintainers; [ LunNova mjoerg ];
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 })
diff --git a/pkgs/tools/misc/eludris/default.nix b/pkgs/tools/misc/eludris/default.nix
index e0762d179ec0..756324c1a8b2 100644
--- a/pkgs/tools/misc/eludris/default.nix
+++ b/pkgs/tools/misc/eludris/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoBuildFlags = [ "-p eludris" ];
   cargoTestFlags = [ "-p eludris" ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
   nativeBuildInputs = [ pkg-config ];
 
   meta = with lib; {
diff --git a/pkgs/tools/misc/envchain/default.nix b/pkgs/tools/misc/envchain/default.nix
index 984dd60082e3..22a007536399 100644
--- a/pkgs/tools/misc/envchain/default.nix
+++ b/pkgs/tools/misc/envchain/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ libsecret readline ]
-    ++ lib.optionals stdenv.isDarwin [ libedit ncurses Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libedit ncurses Security ];
 
   makeFlags = [ "DESTDIR=$(out)" ];
 
diff --git a/pkgs/tools/misc/expect/default.nix b/pkgs/tools/misc/expect/default.nix
index 102120a8604e..ffbfb3a64141 100644
--- a/pkgs/tools/misc/expect/default.nix
+++ b/pkgs/tools/misc/expect/default.nix
@@ -42,7 +42,7 @@ tcl.mkTclDerivation rec {
 
   postInstall = ''
     tclWrapperArgs+=(--prefix PATH : ${lib.makeBinPath [ tcl ]})
-    ${lib.optionalString stdenv.isDarwin "tclWrapperArgs+=(--prefix DYLD_LIBRARY_PATH : $out/lib/expect${version})"}
+    ${lib.optionalString stdenv.hostPlatform.isDarwin "tclWrapperArgs+=(--prefix DYLD_LIBRARY_PATH : $out/lib/expect${version})"}
   '';
 
   outputs = [ "out" "dev" ];
diff --git a/pkgs/tools/misc/fclones/default.nix b/pkgs/tools/misc/fclones/default.nix
index deb97aced8ef..f7a70b966acf 100644
--- a/pkgs/tools/misc/fclones/default.nix
+++ b/pkgs/tools/misc/fclones/default.nix
@@ -18,12 +18,12 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-mEgFfg8I+JJuUEvj+sia2aL3BVg3HteQorZ2EOiLo64=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.AppKit
   ];
 
   # device::test_physical_device_name test fails on Darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkFlags = [
     # ofborg sometimes fails with "Resource temporarily unavailable"
diff --git a/pkgs/tools/misc/fclones/gui.nix b/pkgs/tools/misc/fclones/gui.nix
index 8dff1eec4928..bf010cfa798e 100644
--- a/pkgs/tools/misc/fclones/gui.nix
+++ b/pkgs/tools/misc/fclones/gui.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
     gdk-pixbuf
     gtk4
     libadwaita
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.IOKit
   ];
 
diff --git a/pkgs/tools/misc/fcp/default.nix b/pkgs/tools/misc/fcp/default.nix
index 814d764a7999..9d3a7c4074fe 100644
--- a/pkgs/tools/misc/fcp/default.nix
+++ b/pkgs/tools/misc/fcp/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ expect ];
 
   # character_device fails with "File name too long" on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     patchShebangs tests/*.exp
diff --git a/pkgs/tools/misc/fend/default.nix b/pkgs/tools/misc/fend/default.nix
index 860906fdd555..aa1fda03a455 100644
--- a/pkgs/tools/misc/fend/default.nix
+++ b/pkgs/tools/misc/fend/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-R5p7f+eEMDs0rs+45XNJC4znrJ9BrPBv5+dvMgoHFdA=";
 
   nativeBuildInputs = [ pandoc installShellFiles pkg-config copyDesktopItems ];
-  buildInputs = [ pkg-config openssl ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = [ pkg-config openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   postBuild = ''
     patchShebangs --build ./documentation/build.sh
diff --git a/pkgs/tools/misc/ffsend/default.nix b/pkgs/tools/misc/ffsend/default.nix
index 91fcaf4ac449..c24650d4ffbc 100644
--- a/pkgs/tools/misc/ffsend/default.nix
+++ b/pkgs/tools/misc/ffsend/default.nix
@@ -2,13 +2,13 @@
 , installShellFiles
 , Security, AppKit
 
-, x11Support ? stdenv.isLinux || stdenv.hostPlatform.isBSD
+, x11Support ? stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isBSD
 , xclip ? null, xsel ? null
 , preferXsel ? false # if true and xsel is non-null, use it instead of xclip
 }:
 
 let
-  usesX11 = stdenv.isLinux || stdenv.isBSD;
+  usesX11 = stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isBSD;
 in
 
 assert (x11Support && usesX11) -> xclip != null || xsel != null;
@@ -58,9 +58,9 @@ rustPlatform.buildRustPackage rec {
   ];
 
   nativeBuildInputs = [ installShellFiles ]
-    ++ lib.optionals stdenv.isLinux [ pkg-config ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
   buildInputs =
-    if stdenv.isDarwin then [ Security AppKit ]
+    if stdenv.hostPlatform.isDarwin then [ Security AppKit ]
     else [ openssl ];
 
   preBuild = lib.optionalString (x11Support && usesX11) (
diff --git a/pkgs/tools/misc/findutils/default.nix b/pkgs/tools/misc/findutils/default.nix
index 41432415a2c6..239aa98b04e0 100644
--- a/pkgs/tools/misc/findutils/default.nix
+++ b/pkgs/tools/misc/findutils/default.nix
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
     "--localstatedir=/var/cache"
   ];
 
-  CFLAGS = lib.optionals stdenv.isDarwin [
+  CFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [
     # TODO: Revisit upstream issue https://savannah.gnu.org/bugs/?59972
     # https://github.com/Homebrew/homebrew-core/pull/69761#issuecomment-770268478
     "-D__nonnull\\(params\\)="
diff --git a/pkgs/tools/misc/flashrom/default.nix b/pkgs/tools/misc/flashrom/default.nix
index 190841582a4f..744876ffb62e 100644
--- a/pkgs/tools/misc/flashrom/default.nix
+++ b/pkgs/tools/misc/flashrom/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config installShellFiles ];
   buildInputs = [ libftdi1 libusb1 ]
-    ++ lib.optionals (!stdenv.isDarwin) [ pciutils ]
+    ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ pciutils ]
     ++ lib.optional jlinkSupport libjaylink;
 
   postPatch = ''
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "PREFIX=$(out)" "libinstall" ]
     ++ lib.optional jlinkSupport "CONFIG_JLINK_SPI=yes"
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ "CONFIG_INTERNAL_X86=no" "CONFIG_INTERNAL_DMI=no" "CONFIG_RAYER_SPI=no" ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ "CONFIG_INTERNAL_X86=no" "CONFIG_INTERNAL_DMI=no" "CONFIG_RAYER_SPI=no" ];
 
   postInstall = ''
     install -Dm644 util/flashrom_udev.rules $out/lib/udev/rules.d/flashrom.rules
diff --git a/pkgs/tools/misc/flitter/default.nix b/pkgs/tools/misc/flitter/default.nix
index b32329efd9eb..01f231db4475 100644
--- a/pkgs/tools/misc/flitter/default.nix
+++ b/pkgs/tools/misc/flitter/default.nix
@@ -34,6 +34,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/alexozer/flitter";
     platforms = platforms.unix;
     mainProgram = "flitter";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/misc/flowgger/default.nix b/pkgs/tools/misc/flowgger/default.nix
index 6783e9dc80cf..1cff8298ca9b 100644
--- a/pkgs/tools/misc/flowgger/default.nix
+++ b/pkgs/tools/misc/flowgger/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isDarwin CoreServices;
+    ++ lib.optional stdenv.hostPlatform.isDarwin CoreServices;
 
   checkFlags = [
     # test failed
diff --git a/pkgs/tools/misc/fondu/default.nix b/pkgs/tools/misc/fondu/default.nix
index 9435d0487b76..fe6ab396d139 100644
--- a/pkgs/tools/misc/fondu/default.nix
+++ b/pkgs/tools/misc/fondu/default.nix
@@ -9,11 +9,11 @@ stdenv.mkDerivation rec {
     sha256 = "152prqad9jszjmm4wwqrq83zk13ypsz09n02nrk1gg0fcxfm7fr2";
   };
 
-  postConfigure = lib.optionalString stdenv.isDarwin ''
+  postConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace /System/Library/Frameworks/CoreServices.framework/CoreServices "-framework CoreServices"
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   makeFlags = [ "DESTDIR=$(out)" ];
 
diff --git a/pkgs/tools/misc/fontforge/default.nix b/pkgs/tools/misc/fontforge/default.nix
index fe626a417ab3..495a3dad8330 100644
--- a/pkgs/tools/misc/fontforge/default.nix
+++ b/pkgs/tools/misc/fontforge/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
   '';
 
   # do not use x87's 80-bit arithmetic, rouding errors result in very different font binaries
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-msse2 -mfpmath=sse";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isi686 "-msse2 -mfpmath=sse";
 
   nativeBuildInputs = [ pkg-config cmake ];
   buildInputs = [
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   ]
     ++ lib.optionals withSpiro [ libspiro ]
     ++ lib.optionals withGUI [ gtk3 cairo pango ]
-    ++ lib.optionals stdenv.isDarwin [ Carbon Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Carbon Cocoa ];
 
   cmakeFlags = [ "-DCMAKE_BUILD_WITH_INSTALL_RPATH=ON" ]
     ++ lib.optional (!withSpiro) "-DENABLE_LIBSPIRO=OFF"
diff --git a/pkgs/tools/misc/freshfetch/default.nix b/pkgs/tools/misc/freshfetch/default.nix
index 40119d9f0b3d..ccbaa1f1bfa8 100644
--- a/pkgs/tools/misc/freshfetch/default.nix
+++ b/pkgs/tools/misc/freshfetch/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
   # freshfetch depends on rust nightly features
   RUSTC_BOOTSTRAP = 1;
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     CoreFoundation
     DiskArbitration
diff --git a/pkgs/tools/misc/fsearch/default.nix b/pkgs/tools/misc/fsearch/default.nix
index 43902b5d99ca..453e200ea609 100644
--- a/pkgs/tools/misc/fsearch/default.nix
+++ b/pkgs/tools/misc/fsearch/default.nix
@@ -52,6 +52,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ artturin ];
     platforms = platforms.unix;
     mainProgram = "fsearch";
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/fsearch.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/fsearch.x86_64-darwin
   };
 }
diff --git a/pkgs/tools/misc/fselect/default.nix b/pkgs/tools/misc/fselect/default.nix
index feeb9f3a3d21..95c5b4af0520 100644
--- a/pkgs/tools/misc/fselect/default.nix
+++ b/pkgs/tools/misc/fselect/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-eqzqIyQHHklxo3aojCvY06TUPSqChoz6yZ2zzpgRNqs=";
 
   nativeBuildInputs = [ installShellFiles ];
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   postInstall = ''
     installManPage docs/fselect.1
diff --git a/pkgs/tools/misc/fw/default.nix b/pkgs/tools/misc/fw/default.nix
index 5483bc872d4a..7855747c5999 100644
--- a/pkgs/tools/misc/fw/default.nix
+++ b/pkgs/tools/misc/fw/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     libgit2
     openssl
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/tools/misc/fwup/default.nix b/pkgs/tools/misc/fwup/default.nix
index 904aca205214..c7226904af62 100644
--- a/pkgs/tools/misc/fwup/default.nix
+++ b/pkgs/tools/misc/fwup/default.nix
@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
     libsodium
     xz
     zlib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     DiskArbitration
   ];
 
@@ -60,7 +60,7 @@ stdenv.mkDerivation rec {
     xdelta
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Configurable embedded Linux firmware update creator and runner";
diff --git a/pkgs/tools/misc/geekbench/6.nix b/pkgs/tools/misc/geekbench/6.nix
index 2aca571e2cf9..2f1d2d0b6be1 100644
--- a/pkgs/tools/misc/geekbench/6.nix
+++ b/pkgs/tools/misc/geekbench/6.nix
@@ -21,7 +21,7 @@ let
       hash = "sha256-fbf01qa9wx3k9j8AEqv38fAM3F9tZOcnpH/wa/9rawQ=";
     };
   };
-  geekbench_avx2 = lib.optionalString stdenv.isx86_64 "geekbench_avx2";
+  geekbench_avx2 = lib.optionalString stdenv.hostPlatform.isx86_64 "geekbench_avx2";
 in
 stdenv.mkDerivation {
   inherit version;
diff --git a/pkgs/tools/misc/getoptions/default.nix b/pkgs/tools/misc/getoptions/default.nix
index 2ff3d4c64403..d3dcde29dcd6 100644
--- a/pkgs/tools/misc/getoptions/default.nix
+++ b/pkgs/tools/misc/getoptions/default.nix
@@ -16,14 +16,14 @@ stdenvNoCC.mkDerivation rec {
   doCheck = true;
 
   nativeCheckInputs = [ shellspec ksh mksh yash zsh ]
-    ++ lib.lists.optional (!stdenvNoCC.isDarwin) busybox-sandbox-shell;
+    ++ lib.lists.optional (!stdenvNoCC.hostPlatform.isDarwin) busybox-sandbox-shell;
 
   # Disable checks against yash, since shellspec seems to be broken for yash>=2.54
   # (see: https://github.com/NixOS/nixpkgs/pull/218264#pullrequestreview-1434402054)
   preCheck = ''
     sed -i '/shellspec -s posh/d' Makefile
     sed -i '/shellspec -s yash/d' Makefile
-    '' + lib.strings.optionalString stdenvNoCC.isDarwin ''
+    '' + lib.strings.optionalString stdenvNoCC.hostPlatform.isDarwin ''
     sed -i "/shellspec -s 'busybox ash'/d" Makefile
   '';
 
diff --git a/pkgs/tools/misc/gh-cal/default.nix b/pkgs/tools/misc/gh-cal/default.nix
index e14acf372a79..2e4d05b1c274 100644
--- a/pkgs/tools/misc/gh-cal/default.nix
+++ b/pkgs/tools/misc/gh-cal/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-73gqk0DjhaLGIEP5VQQlubPomxHQyg4RnY5XTgE7msQ=";
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "GitHub contributions calender terminal viewer";
diff --git a/pkgs/tools/misc/ghostie/default.nix b/pkgs/tools/misc/ghostie/default.nix
index 0a4e1cb695e0..e6a47a557738 100644
--- a/pkgs/tools/misc/ghostie/default.nix
+++ b/pkgs/tools/misc/ghostie/default.nix
@@ -33,14 +33,14 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
   ];
 
   # 4 out of 5 tests are notification tests which do not work in nix builds
   doCheck = false;
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export HOME=$(mktemp -d)
   '';
 
@@ -50,7 +50,7 @@ rustPlatform.buildRustPackage rec {
     changelog = "https://github.com/attriaayush/ghostie/releases/tag/v${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ matthiasbeyer ];
-    broken = stdenv.isx86_64 && stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform.isDarwin;
     mainProgram = "ghostie";
   };
 }
diff --git a/pkgs/tools/misc/gigalixir/default.nix b/pkgs/tools/misc/gigalixir/default.nix
index 101b5f6a9346..8628fdfcffb3 100644
--- a/pkgs/tools/misc/gigalixir/default.nix
+++ b/pkgs/tools/misc/gigalixir/default.nix
@@ -55,7 +55,7 @@ python3.pkgs.buildPythonApplication rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Gigalixir Command-Line Interface";
     homepage = "https://github.com/gigalixir/gigalixir-cli";
     license = licenses.mit;
diff --git a/pkgs/tools/misc/gitrs/default.nix b/pkgs/tools/misc/gitrs/default.nix
index f6a49fe850ce..99139437b4a7 100644
--- a/pkgs/tools/misc/gitrs/default.nix
+++ b/pkgs/tools/misc/gitrs/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = [ openssl.dev ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
diff --git a/pkgs/tools/misc/goaccess/default.nix b/pkgs/tools/misc/goaccess/default.nix
index 9fd40e7fc334..81cf43feb659 100644
--- a/pkgs/tools/misc/goaccess/default.nix
+++ b/pkgs/tools/misc/goaccess/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     ncurses
     openssl
-  ] ++ lib.optionals withGeolocation [ libmaxminddb ] ++ lib.optionals stdenv.isDarwin [ gettext ];
+  ] ++ lib.optionals withGeolocation [ libmaxminddb ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ gettext ];
 
   configureFlags = [
     "--enable-utf8"
diff --git a/pkgs/tools/misc/goose/default.nix b/pkgs/tools/misc/goose/default.nix
index b329eeea9691..058408ca9f2c 100644
--- a/pkgs/tools/misc/goose/default.nix
+++ b/pkgs/tools/misc/goose/default.nix
@@ -40,7 +40,7 @@ buildGoModule rec {
     "-skip=TestClickUpDown|TestClickHouseFirstThree|TestLockModeAdvisorySession|TestDialectStore|TestGoMigrationStats|TestPostgresSessionLocker"
   ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Database migration tool which supports SQL migrations and Go functions";
diff --git a/pkgs/tools/misc/gotify-desktop/default.nix b/pkgs/tools/misc/gotify-desktop/default.nix
index d1b67d927cf7..e184c38d5eb7 100644
--- a/pkgs/tools/misc/gotify-desktop/default.nix
+++ b/pkgs/tools/misc/gotify-desktop/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/desbma/gotify-desktop";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ bryanasdev000 genofire ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "gotify-desktop";
   };
 }
diff --git a/pkgs/tools/misc/grex/default.nix b/pkgs/tools/misc/grex/default.nix
index 2697c6b3febe..f3263303f96d 100644
--- a/pkgs/tools/misc/grex/default.nix
+++ b/pkgs/tools/misc/grex/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-ZRE1vKgi0/UtSe2bdN0BLdtDfAauTfwcqOcl3y63fAA=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   doInstallCheck = true;
   installCheckPhase = ''
diff --git a/pkgs/tools/misc/grit/default.nix b/pkgs/tools/misc/grit/default.nix
index ca68506faab7..d9cffca07f0c 100644
--- a/pkgs/tools/misc/grit/default.nix
+++ b/pkgs/tools/misc/grit/default.nix
@@ -14,7 +14,7 @@ buildGoModule rec {
   vendorHash = "sha256-iMMkjJ5dnlr0oSCifBQPWkInQBCp1bh23s+BcKzDNCg=";
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Multitree-based personal task manager";
     homepage = "https://github.com/climech/grit";
     license = licenses.mit;
diff --git a/pkgs/tools/misc/grub4dos/default.nix b/pkgs/tools/misc/grub4dos/default.nix
index 8b78c29defe7..b18298e37b66 100644
--- a/pkgs/tools/misc/grub4dos/default.nix
+++ b/pkgs/tools/misc/grub4dos/default.nix
@@ -1,8 +1,8 @@
 { lib, stdenv, fetchFromGitHub, nasm }:
 
 let arch =
-  if stdenv.isi686 then "i386"
-  else if stdenv.isx86_64 then "x86_64"
+  if stdenv.hostPlatform.isi686 then "i386"
+  else if stdenv.hostPlatform.isx86_64 then "x86_64"
   else throw "Unknown architecture";
 in stdenv.mkDerivation {
   pname = "grub4dos";
diff --git a/pkgs/tools/misc/halp/default.nix b/pkgs/tools/misc/halp/default.nix
index e036336eb10c..2a8b869861cd 100644
--- a/pkgs/tools/misc/halp/default.nix
+++ b/pkgs/tools/misc/halp/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   # tests are failing on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkFlags = [
     # requires internet access
diff --git a/pkgs/tools/misc/handlr/default.nix b/pkgs/tools/misc/handlr/default.nix
index b2245eafe534..612331138572 100644
--- a/pkgs/tools/misc/handlr/default.nix
+++ b/pkgs/tools/misc/handlr/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-30fSOzWq1CoIabPWGWndi/SaCN/ckxjlbtzuwV8rk6M=";
 
   nativeBuildInputs = [ installShellFiles shared-mime-info ];
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   preCheck = ''
     export HOME=$TEMPDIR
diff --git a/pkgs/tools/misc/hdf4/default.nix b/pkgs/tools/misc/hdf4/default.nix
index 2636cb71717b..6553c1c70d65 100644
--- a/pkgs/tools/misc/hdf4/default.nix
+++ b/pkgs/tools/misc/hdf4/default.nix
@@ -5,7 +5,7 @@
 , fixDarwinDylibNames
 , cmake
 , libjpeg
-, uselibtirpc ? stdenv.isLinux
+, uselibtirpc ? stdenv.hostPlatform.isLinux
 , libtirpc
 , zlib
 , szipSupport ? false
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     fixDarwinDylibNames
   ] ++ lib.optional fortranSupport gfortran;
 
@@ -104,7 +104,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  excludedTests = lib.optionals stdenv.isDarwin [
+  excludedTests = lib.optionals stdenv.hostPlatform.isDarwin [
     "MFHDF_TEST-hdftest"
     "MFHDF_TEST-hdftest-shared"
     "HDP-dumpsds-18"
diff --git a/pkgs/tools/misc/hdf5/default.nix b/pkgs/tools/misc/hdf5/default.nix
index 226143c44be6..80f7c151bf95 100644
--- a/pkgs/tools/misc/hdf5/default.nix
+++ b/pkgs/tools/misc/hdf5/default.nix
@@ -71,7 +71,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DHDF5_INSTALL_CMAKE_DIR=${placeholder "dev"}/lib/cmake"
     "-DBUILD_STATIC_LIBS=${lib.boolToString enableStatic}"
-  ] ++ lib.optional stdenv.isDarwin "-DHDF5_BUILD_WITH_INSTALL_NAME=ON"
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "-DHDF5_BUILD_WITH_INSTALL_NAME=ON"
     ++ lib.optional cppSupport "-DHDF5_BUILD_CPP_LIB=ON"
     ++ lib.optional fortranSupport "-DHDF5_BUILD_FORTRAN=ON"
     ++ lib.optional szipSupport "-DHDF5_ENABLE_SZIP_SUPPORT=ON"
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
     ++ lib.optionals threadsafe [ "-DDHDF5_ENABLE_THREADSAFE:BOOL=ON" "-DHDF5_BUILD_HL_LIB=OFF" ]
     # broken in nixpkgs since around 1.14.3 -> 1.14.4.3
     # https://github.com/HDFGroup/hdf5/issues/4208#issuecomment-2098698567
-    ++ lib.optional (stdenv.isDarwin && stdenv.isx86_64) "-DHDF5_ENABLE_NONSTANDARD_FEATURE_FLOAT16=OFF"
+    ++ lib.optional (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) "-DHDF5_ENABLE_NONSTANDARD_FEATURE_FLOAT16=OFF"
   ;
 
   postInstall = ''
diff --git a/pkgs/tools/misc/hdfview/default.nix b/pkgs/tools/misc/hdfview/default.nix
index bbc6f512be7d..83597d45004e 100644
--- a/pkgs/tools/misc/hdfview/default.nix
+++ b/pkgs/tools/misc/hdfview/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   buildPhase =
     let
-      arch = if stdenv.isx86_64 then "x86_64" else "aarch64";
+      arch = if stdenv.hostPlatform.isx86_64 then "x86_64" else "aarch64";
     in
     ''
       runHook preBuild
@@ -52,7 +52,7 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/bin $out/lib
     cp -a build/dist/HDFView/bin/HDFView $out/bin/
     cp -a build/dist/HDFView/lib/app $out/lib/
@@ -61,7 +61,7 @@ stdenv.mkDerivation rec {
 
     mkdir -p $out/share/applications $out/share/icons/hicolor/32x32/apps
     cp src/HDFView.png $out/share/icons/hicolor/32x32/apps/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     cp -a build/dist/HDFView.app $out/Applications/
   '' + ''
diff --git a/pkgs/tools/misc/heimdall/default.nix b/pkgs/tools/misc/heimdall/default.nix
index ce56a4f4057b..d750bdb131c6 100644
--- a/pkgs/tools/misc/heimdall/default.nix
+++ b/pkgs/tools/misc/heimdall/default.nix
@@ -27,11 +27,11 @@ mkDerivation rec {
   preConfigure = ''
     # Give ownership of the Galaxy S USB device to the logged in user.
     substituteInPlace heimdall/60-heimdall.rules --replace 'MODE="0666"' 'TAG+="uaccess"'
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace libpit/CMakeLists.txt --replace "-std=gnu++11" ""
   '';
 
-  installPhase = lib.optionalString (stdenv.isDarwin && enableGUI) ''
+  installPhase = lib.optionalString (stdenv.hostPlatform.isDarwin && enableGUI) ''
     mkdir -p $out/Applications
     mv bin/heimdall-frontend.app $out/Applications/heimdall-frontend.app
     wrapQtApp $out/Applications/heimdall-frontend.app/Contents/MacOS/heimdall-frontend
@@ -44,7 +44,7 @@ mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "http://www.glassechidna.com.au/products/heimdall/";
     description = "Cross-platform tool suite to flash firmware onto Samsung Galaxy S devices";
     license = licenses.mit;
diff --git a/pkgs/tools/misc/hidrd/default.nix b/pkgs/tools/misc/hidrd/default.nix
index 5ce3e969f276..d3a8a4012433 100644
--- a/pkgs/tools/misc/hidrd/default.nix
+++ b/pkgs/tools/misc/hidrd/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ pacien ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/hidrd.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/hidrd.x86_64-darwin
     mainProgram = "hidrd-convert";
   };
 }
diff --git a/pkgs/tools/misc/hiksink/default.nix b/pkgs/tools/misc/hiksink/default.nix
index def3f4776949..77e74e8116f7 100644
--- a/pkgs/tools/misc/hiksink/default.nix
+++ b/pkgs/tools/misc/hiksink/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/misc/hoard/default.nix b/pkgs/tools/misc/hoard/default.nix
index 4bdf7b7127b8..1972c9c79386 100644
--- a/pkgs/tools/misc/hoard/default.nix
+++ b/pkgs/tools/misc/hoard/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/misc/hsd/default.nix b/pkgs/tools/misc/hsd/default.nix
index 44100e15283c..d1f41a72a1c2 100644
--- a/pkgs/tools/misc/hsd/default.nix
+++ b/pkgs/tools/misc/hsd/default.nix
@@ -22,7 +22,7 @@ buildNpmPackage rec {
 
   nativeBuildInputs = [
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
diff --git a/pkgs/tools/misc/hyperfine/default.nix b/pkgs/tools/misc/hyperfine/default.nix
index 16de5fa76f3d..e4922824d729 100644
--- a/pkgs/tools/misc/hyperfine/default.nix
+++ b/pkgs/tools/misc/hyperfine/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-E2y/hQNcpW6b/ZJBlsp+2RDH2OgpX4kbn36aBHA5X6U=";
 
   nativeBuildInputs = [ installShellFiles ];
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     installManPage doc/hyperfine.1
diff --git a/pkgs/tools/misc/iay/default.nix b/pkgs/tools/misc/iay/default.nix
index 1ef3d332e75d..5973ed258b59 100644
--- a/pkgs/tools/misc/iay/default.nix
+++ b/pkgs/tools/misc/iay/default.nix
@@ -28,14 +28,14 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
   ]
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
     Security
   ];
 
-  NIX_LDFLAGS = lib.optionals stdenv.isDarwin [ "-framework" "AppKit" ];
+  NIX_LDFLAGS = lib.optionals stdenv.hostPlatform.isDarwin [ "-framework" "AppKit" ];
 
   meta = with lib; {
     description = "Minimalistic, blazing-fast, and extendable prompt for bash and zsh";
diff --git a/pkgs/tools/misc/idutils/default.nix b/pkgs/tools/misc/idutils/default.nix
index cbdf1b761049..d065800b458f 100644
--- a/pkgs/tools/misc/idutils/default.nix
+++ b/pkgs/tools/misc/idutils/default.nix
@@ -16,15 +16,15 @@ stdenv.mkDerivation rec {
     ./bootstrap --force --gnulib-srcdir=${gnulib} --skip-po --bootstrap-sync --no-git
     '';
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     emacs
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
   nativeBuildInputs = [ gnulib autoconf bison automake gettext gperf texinfo perl rsync ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   patches = [ ./nix-mapping.patch ];
 
diff --git a/pkgs/tools/misc/inav-blackbox-tools/default.nix b/pkgs/tools/misc/inav-blackbox-tools/default.nix
index 43524f6a3fe2..228035108a81 100644
--- a/pkgs/tools/misc/inav-blackbox-tools/default.nix
+++ b/pkgs/tools/misc/inav-blackbox-tools/default.nix
@@ -30,6 +30,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Only;
     maintainers = with maintainers; [ expipiplus1 ];
     platforms = platforms.all;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/inav-blackbox-tools.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/inav-blackbox-tools.x86_64-darwin
   };
 }
diff --git a/pkgs/tools/misc/intermodal/default.nix b/pkgs/tools/misc/intermodal/default.nix
index 4d6868d5d364..b4b7d7807cb4 100644
--- a/pkgs/tools/misc/intermodal/default.nix
+++ b/pkgs/tools/misc/intermodal/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-k34psGOs6G+B/msmLSDHLNxnjO1yyE4OY6aQU8bt+is=";
 
   # include_hidden test tries to use `chflags` on darwin
-  checkFlags = lib.optionals stdenv.isDarwin [ "--skip=subcommand::torrent::create::tests::include_hidden" ];
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "--skip=subcommand::torrent::create::tests::include_hidden" ];
 
   nativeBuildInputs = [ installShellFiles ];
 
diff --git a/pkgs/tools/misc/jdupes/default.nix b/pkgs/tools/misc/jdupes/default.nix
index 9c6988846990..6a4b5c3c393c 100644
--- a/pkgs/tools/misc/jdupes/default.nix
+++ b/pkgs/tools/misc/jdupes/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   makeFlags =
     [ "PREFIX=${placeholder "out"}" ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       "ENABLE_DEDUPE=1"
       "STATIC_DEDUPE_H=1"
     ]
diff --git a/pkgs/tools/misc/jsonwatch/default.nix b/pkgs/tools/misc/jsonwatch/default.nix
index 451089dc185e..c40e91c87c32 100644
--- a/pkgs/tools/misc/jsonwatch/default.nix
+++ b/pkgs/tools/misc/jsonwatch/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Gjb7v3kz11iOml3Ykxhy43KNxzaprgMbb5DpPNChLTc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mit;
     maintainers = with maintainers; [ fab ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
     mainProgram = "jsonwatch";
   };
 }
diff --git a/pkgs/tools/misc/krapslog/default.nix b/pkgs/tools/misc/krapslog/default.nix
index 5448fa942763..f4f1410ec512 100644
--- a/pkgs/tools/misc/krapslog/default.nix
+++ b/pkgs/tools/misc/krapslog/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-5jhEcwOdzLqzxQsEBqo4d5ecsg/vhiKuVjGYIwFzihE=";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   meta = with lib; {
     description = "Visualize a log file with sparklines";
diff --git a/pkgs/tools/misc/lbdb/default.nix b/pkgs/tools/misc/lbdb/default.nix
index 20ea8beaaa83..cd1f8d0c4861 100644
--- a/pkgs/tools/misc/lbdb/default.nix
+++ b/pkgs/tools/misc/lbdb/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ perl' ]
-    ++ lib.optional (!stdenv.isDarwin) bsd-finger
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) bsd-finger
     ++ lib.optional withAbook abook
     ++ lib.optional withGnupg gnupg
     ++ lib.optional withGoobook goobook
diff --git a/pkgs/tools/misc/leanify/default.nix b/pkgs/tools/misc/leanify/default.nix
index f0006ff7f183..81f6205986df 100644
--- a/pkgs/tools/misc/leanify/default.nix
+++ b/pkgs/tools/misc/leanify/default.nix
@@ -15,14 +15,14 @@ stdenv.mkDerivation rec {
     hash = "sha256-fLazKCQnOT3bN3Kz25Q80RLk54EU5U6HCf6kPLcXn9c=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace-fail "-flto" "" \
       --replace-fail "lib/LZMA/Alloc.o" "lib/LZMA/CpuArch.o lib/LZMA/Alloc.o" \
       --replace-quiet "-Werror" ""
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   doCheck = true;
 
diff --git a/pkgs/tools/misc/lesspipe/default.nix b/pkgs/tools/misc/lesspipe/default.nix
index b2c310bc5f40..8fd4689aaeac 100644
--- a/pkgs/tools/misc/lesspipe/default.nix
+++ b/pkgs/tools/misc/lesspipe/default.nix
@@ -74,7 +74,7 @@ stdenv.mkDerivation rec {
           "mdcat" "pandoc" "docx2txt" "libreoffice" "pptx2md" "mdcat" "xlscat" "odt2txt" "wvText" "antiword" "catdoc"
           "broken_catppt" "sxw2txt" "groff" "mandoc" "unrtf" "dvi2tty" "pod2text" "perldoc" "h5dump" "ncdump" "matdump"
           "djvutxt" "openssl" "gpg" "plistutil" "plutil" "id3v2" "csvlook" "jq" "zlib-flate" "lessfilter"
-        ] ++ lib.optional (stdenv.isDarwin || stdenv.isFreeBSD) [
+        ] ++ lib.optional (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isFreeBSD) [
           # resholve only identifies this on darwin/bsd
           # call site is guarded by || so it's safe to leave dynamic
           "locale"
diff --git a/pkgs/tools/misc/lighthouse-steamvr/default.nix b/pkgs/tools/misc/lighthouse-steamvr/default.nix
index 4ddd33ff1872..1898bfc7b295 100644
--- a/pkgs/tools/misc/lighthouse-steamvr/default.nix
+++ b/pkgs/tools/misc/lighthouse-steamvr/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [ dbus ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "VR Lighthouse power state management";
     homepage = "https://github.com/ShayBox/Lighthouse";
     license = licenses.mit;
diff --git a/pkgs/tools/misc/livedl/default.nix b/pkgs/tools/misc/livedl/default.nix
index 6db500695933..9a3b4c3fd1f6 100644
--- a/pkgs/tools/misc/livedl/default.nix
+++ b/pkgs/tools/misc/livedl/default.nix
@@ -22,7 +22,7 @@ buildGoModule rec {
     license = licenses.mit;
     maintainers = with maintainers; [ wakira ];
     platforms = platforms.linux ++ platforms.darwin;
-    broken = stdenv.isDarwin; # build fails with go > 1.17
+    broken = stdenv.hostPlatform.isDarwin; # build fails with go > 1.17
     mainProgram = "livedl";
   };
 }
diff --git a/pkgs/tools/misc/lorri/default.nix b/pkgs/tools/misc/lorri/default.nix
index 001efe6563b8..6ba07b3d874e 100644
--- a/pkgs/tools/misc/lorri/default.nix
+++ b/pkgs/tools/misc/lorri/default.nix
@@ -38,7 +38,7 @@ in (rustPlatform.buildRustPackage rec {
   RUN_TIME_CLOSURE = pkgs.callPackage ./runtime.nix { };
 
   nativeBuildInputs = [ rustPackages.rustfmt ];
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices Security ];
 
   # copy the docs to the $man and $doc outputs
   postInstall = ''
diff --git a/pkgs/tools/misc/macchina/default.nix b/pkgs/tools/misc/macchina/default.nix
index 036d500f6b65..d5b4343362a6 100644
--- a/pkgs/tools/misc/macchina/default.nix
+++ b/pkgs/tools/misc/macchina/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.DisplayServices
   ];
diff --git a/pkgs/tools/misc/marlin-calc/default.nix b/pkgs/tools/misc/marlin-calc/default.nix
index dc8ff4221009..ec8e90631b54 100644
--- a/pkgs/tools/misc/marlin-calc/default.nix
+++ b/pkgs/tools/misc/marlin-calc/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
     license = licenses.gpl3;
     maintainers = with maintainers; [ gebner ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/marlin-calc.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/marlin-calc.x86_64-darwin
     mainProgram = "marlin-calc";
   };
 }
diff --git a/pkgs/tools/misc/memtest86+/default.nix b/pkgs/tools/misc/memtest86+/default.nix
index 72b74039f780..d7dc5606a647 100644
--- a/pkgs/tools/misc/memtest86+/default.nix
+++ b/pkgs/tools/misc/memtest86+/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
   passthru.efi = "${finalAttrs.finalPackage}/memtest.efi";
 
   preBuild = ''
-    cd ${if stdenv.isi686 then "build32" else "build64"}
+    cd ${if stdenv.hostPlatform.isi686 then "build32" else "build64"}
   '';
 
   installPhase = ''
diff --git a/pkgs/tools/misc/minicom/default.nix b/pkgs/tools/misc/minicom/default.nix
index 50043a132b14..89653c26d6a0 100644
--- a/pkgs/tools/misc/minicom/default.nix
+++ b/pkgs/tools/misc/minicom/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-+fKvHrApDXm94LItXv+xSDIE5zD7rTY5IeNSuzQglpg=";
   };
 
-  buildInputs = [ ncurses ] ++ lib.optionals stdenv.isDarwin [ libiconv IOKit ];
+  buildInputs = [ ncurses ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv IOKit ];
 
   nativeBuildInputs = [ autoreconfHook makeWrapper pkg-config ];
 
diff --git a/pkgs/tools/misc/miniserve/default.nix b/pkgs/tools/misc/miniserve/default.nix
index 745d18715ba3..7822fd6d8d20 100644
--- a/pkgs/tools/misc/miniserve/default.nix
+++ b/pkgs/tools/misc/miniserve/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/tools/misc/mise/default.nix b/pkgs/tools/misc/mise/default.nix
index 473d7a308f23..ace598e053b7 100644
--- a/pkgs/tools/misc/mise/default.nix
+++ b/pkgs/tools/misc/mise/default.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-jGqaGbue+AEK0YjhHMlm84XBgA20p8Um03TjctjXVz0=";
 
   nativeBuildInputs = [ installShellFiles pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   postPatch = ''
     patchShebangs --build \
diff --git a/pkgs/tools/misc/mktorrent/default.nix b/pkgs/tools/misc/mktorrent/default.nix
index 74f449969a66..3fb3f7390fe6 100644
--- a/pkgs/tools/misc/mktorrent/default.nix
+++ b/pkgs/tools/misc/mktorrent/default.nix
@@ -12,8 +12,8 @@ stdenv.mkDerivation rec {
   };
 
   makeFlags = [ "USE_PTHREADS=1" "USE_OPENSSL=1" "USE_LONG_OPTIONS=1" ]
-    ++ lib.optional stdenv.isi686 "USE_LARGE_FILES=1"
-    ++ lib.optional stdenv.isLinux "CFLAGS=-lgcc_s";
+    ++ lib.optional stdenv.hostPlatform.isi686 "USE_LARGE_FILES=1"
+    ++ lib.optional stdenv.hostPlatform.isLinux "CFLAGS=-lgcc_s";
 
   installFlags = [ "PREFIX=${placeholder "out"}" ];
 
diff --git a/pkgs/tools/misc/moreutils/default.nix b/pkgs/tools/misc/moreutils/default.nix
index 694e9ac93ee1..e557a05f3062 100644
--- a/pkgs/tools/misc/moreutils/default.nix
+++ b/pkgs/tools/misc/moreutils/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ makeWrapper perl libxml2 libxslt docbook-xsl docbook_xml_dtd_44 ];
   buildInputs = [
     (perl.withPackages (p: [ p.IPCRun p.TimeDate p.TimeDuration ]))
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     cctools
   ];
 
diff --git a/pkgs/tools/misc/mpdscribble/default.nix b/pkgs/tools/misc/mpdscribble/default.nix
index e7baa6641ccf..c4e7ad591eb6 100644
--- a/pkgs/tools/misc/mpdscribble/default.nix
+++ b/pkgs/tools/misc/mpdscribble/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     curl
     boost
     libgcrypt
-  ] ++ lib.optional stdenv.isLinux systemd;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux systemd;
 
   meta = with lib; {
     description = "MPD client which submits info about tracks being played to a scrobbler";
diff --git a/pkgs/tools/misc/mpy-utils/default.nix b/pkgs/tools/misc/mpy-utils/default.nix
index 0ee7701b730b..342b6875c204 100644
--- a/pkgs/tools/misc/mpy-utils/default.nix
+++ b/pkgs/tools/misc/mpy-utils/default.nix
@@ -16,6 +16,6 @@ buildPythonApplication rec {
     homepage = "https://github.com/nickzoic/mpy-utils";
     license = licenses.mit;
     maintainers = with maintainers; [ aciceri ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/misc/mynewt-newtmgr/default.nix b/pkgs/tools/misc/mynewt-newtmgr/default.nix
index 1ad1bb7ac1bb..d78c6304a1e3 100644
--- a/pkgs/tools/misc/mynewt-newtmgr/default.nix
+++ b/pkgs/tools/misc/mynewt-newtmgr/default.nix
@@ -34,6 +34,6 @@ buildGoModule rec {
     license = licenses.asl20;
     maintainers = with maintainers; [ bezmuth ];
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/misc/nbench/default.nix b/pkgs/tools/misc/nbench/default.nix
index 44beea57fbb3..b8fa6abfbada 100644
--- a/pkgs/tools/misc/nbench/default.nix
+++ b/pkgs/tools/misc/nbench/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   prePatch = ''
     substituteInPlace nbench1.h --replace '"NNET.DAT"' "\"$out/NNET.DAT\""
     substituteInPlace sysspec.h --replace "malloc.h" "stdlib.h"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile --replace "-static" ""
   '';
 
diff --git a/pkgs/tools/misc/ncdu/default.nix b/pkgs/tools/misc/ncdu/default.nix
index 5209522d2529..abde0b0d79e1 100644
--- a/pkgs/tools/misc/ncdu/default.nix
+++ b/pkgs/tools/misc/ncdu/default.nix
@@ -5,7 +5,7 @@
 , zig
 , installShellFiles
 , testers
-, pie ? stdenv.isDarwin
+, pie ? stdenv.hostPlatform.isDarwin
 }:
 
 stdenv.mkDerivation (finalAttrs: {
diff --git a/pkgs/tools/misc/noti/default.nix b/pkgs/tools/misc/noti/default.nix
index 3401f74de937..1c33f4ff73d3 100644
--- a/pkgs/tools/misc/noti/default.nix
+++ b/pkgs/tools/misc/noti/default.nix
@@ -21,7 +21,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optional stdenv.isDarwin Cocoa;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Cocoa;
 
   ldflags = [
     "-s"
diff --git a/pkgs/tools/misc/ntfy/default.nix b/pkgs/tools/misc/ntfy/default.nix
index 54e232eafd9c..d28688c63399 100644
--- a/pkgs/tools/misc/ntfy/default.nix
+++ b/pkgs/tools/misc/ntfy/default.nix
@@ -3,12 +3,12 @@
 , python39
 , fetchFromGitHub
 , fetchpatch
-, withXmpp ? !stdenv.isDarwin
+, withXmpp ? !stdenv.hostPlatform.isDarwin
 , withMatrix ? true
 , withSlack ? true
 , withEmoji ? true
 , withPid ? true
-, withDbus ? stdenv.isLinux
+, withDbus ? stdenv.hostPlatform.isLinux
 }:
 
 let
diff --git a/pkgs/tools/misc/nurl/default.nix b/pkgs/tools/misc/nurl/default.nix
index e0af2ff638dd..752427cdb0e9 100644
--- a/pkgs/tools/misc/nurl/default.nix
+++ b/pkgs/tools/misc/nurl/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     makeBinaryWrapper
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/misc/nvimpager/default.nix b/pkgs/tools/misc/nvimpager/default.nix
index 80900bf30ae8..364b825292f2 100644
--- a/pkgs/tools/misc/nvimpager/default.nix
+++ b/pkgs/tools/misc/nvimpager/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   # filter out one test that fails in the sandbox of nix or with neovim v0.10
   # or on macOS
   preCheck = ''
-    checkFlagsArray+=('BUSTED=busted --output TAP --exclude-tags=${"nix,v10" + lib.optionalString stdenv.isDarwin ",mac"}')
+    checkFlagsArray+=('BUSTED=busted --output TAP --exclude-tags=${"nix,v10" + lib.optionalString stdenv.hostPlatform.isDarwin ",mac"}')
   '';
 
   meta = with lib; {
diff --git a/pkgs/tools/misc/octofetch/default.nix b/pkgs/tools/misc/octofetch/default.nix
index f254e77ebdea..1218cb1f7b0f 100644
--- a/pkgs/tools/misc/octofetch/default.nix
+++ b/pkgs/tools/misc/octofetch/default.nix
@@ -22,8 +22,8 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     homepage = "https://github.com/azur1s/octofetch";
diff --git a/pkgs/tools/misc/oggvideotools/default.nix b/pkgs/tools/misc/oggvideotools/default.nix
index 13c13f086a29..004fb3579253 100644
--- a/pkgs/tools/misc/oggvideotools/default.nix
+++ b/pkgs/tools/misc/oggvideotools/default.nix
@@ -46,6 +46,6 @@ stdenv.mkDerivation rec {
     # Compilation error on Darwin:
     # error: invalid argument '--std=c++0x' not allowed with 'C'
     # make[2]: *** [src/libresample/CMakeFiles/resample.dir/build.make:76: src/libresample/CMakeFiles/resample.dir/filterkit.c.o] Error 1
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/misc/onefetch/default.nix b/pkgs/tools/misc/onefetch/default.nix
index 2436b68da434..2beca6a81501 100644
--- a/pkgs/tools/misc/onefetch/default.nix
+++ b/pkgs/tools/misc/onefetch/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ cmake installShellFiles pkg-config ];
 
   buildInputs = [ zstd ]
-    ++ lib.optionals stdenv.isDarwin [ CoreFoundation libresolv Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation libresolv Security ];
 
   nativeCheckInputs = [
     git
diff --git a/pkgs/tools/misc/opentelemetry-collector/contrib.nix b/pkgs/tools/misc/opentelemetry-collector/contrib.nix
index 017fd1a015d7..a2a0b255d008 100644
--- a/pkgs/tools/misc/opentelemetry-collector/contrib.nix
+++ b/pkgs/tools/misc/opentelemetry-collector/contrib.nix
@@ -30,7 +30,7 @@ buildGoModule rec {
   CGO_ENABLED = 0;
 
   # journalctl is required in-$PATH for the journald receiver tests.
-  nativeCheckInputs = lib.optionals stdenv.isLinux [ systemdMinimal ];
+  nativeCheckInputs = lib.optionals stdenv.hostPlatform.isLinux [ systemdMinimal ];
 
   # We don't inject the package into propagatedBuildInputs unless
   # asked to avoid hard-requiring a large package. For the journald
diff --git a/pkgs/tools/misc/ostree-rs-ext/default.nix b/pkgs/tools/misc/ostree-rs-ext/default.nix
index d7b09b65f7ae..ece63fe6768a 100644
--- a/pkgs/tools/misc/ostree-rs-ext/default.nix
+++ b/pkgs/tools/misc/ostree-rs-ext/default.nix
@@ -44,7 +44,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     zlib
     ostree
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/tools/misc/otel-cli/default.nix b/pkgs/tools/misc/otel-cli/default.nix
index 09c248178244..b0c4e38c4c52 100644
--- a/pkgs/tools/misc/otel-cli/default.nix
+++ b/pkgs/tools/misc/otel-cli/default.nix
@@ -15,7 +15,7 @@ buildGoModule rec {
 
   preCheck = ''
     ln -s $GOPATH/bin/otel-cli .
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace main_test.go \
       --replace-fail 'const minimumPath = `/bin:/usr/bin`' 'const minimumPath = `${lib.makeBinPath [ getent coreutils ]}`'
   '';
diff --git a/pkgs/tools/misc/otfcc/default.nix b/pkgs/tools/misc/otfcc/default.nix
index aa0d86253d77..d45c800464ab 100644
--- a/pkgs/tools/misc/otfcc/default.nix
+++ b/pkgs/tools/misc/otfcc/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     ./move-makefiles.patch
   ];
 
-  buildFlags = lib.optionals stdenv.isAarch64 [ "config=release_arm" ];
+  buildFlags = lib.optionals stdenv.hostPlatform.isAarch64 [ "config=release_arm" ];
 
   installPhase = ''
     mkdir -p $out/bin
diff --git a/pkgs/tools/misc/owofetch/default.nix b/pkgs/tools/misc/owofetch/default.nix
index 22bbc4ba72fb..20d9cc160d7a 100644
--- a/pkgs/tools/misc/owofetch/default.nix
+++ b/pkgs/tools/misc/owofetch/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-rfN4QERs1H1G7ZZim//78vlxbYfU4Cx7SYYUz/QLKeU=";
 
-  buildInputs = lib.optionals stdenvNoCC.isDarwin [
+  buildInputs = lib.optionals stdenvNoCC.hostPlatform.isDarwin [
     Foundation
     DiskArbitration
   ];
diff --git a/pkgs/tools/misc/pazi/default.nix b/pkgs/tools/misc/pazi/default.nix
index de771e9e86a5..2ccabe628098 100644
--- a/pkgs/tools/misc/pazi/default.nix
+++ b/pkgs/tools/misc/pazi/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Security ];
 
   cargoHash = "sha256-7ChHYcyzRPFkZ+zh9lBOHcOizDvJf2cp9ULoI7Ofmqk=";
 
diff --git a/pkgs/tools/misc/pfetch-rs/default.nix b/pkgs/tools/misc/pfetch-rs/default.nix
index 0a2e3c9ec38d..f86b71f72c7b 100644
--- a/pkgs/tools/misc/pfetch-rs/default.nix
+++ b/pkgs/tools/misc/pfetch-rs/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-/gYL32kUA4gKTGogMrOghQ3XYFjw3GsDhzynUC/OyXY=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.AppKit
     darwin.apple_sdk.frameworks.DisplayServices
   ];
diff --git a/pkgs/tools/misc/pgbadger/default.nix b/pkgs/tools/misc/pgbadger/default.nix
index 27c532e8144c..d25b4db9068f 100644
--- a/pkgs/tools/misc/pgbadger/default.nix
+++ b/pkgs/tools/misc/pgbadger/default.nix
@@ -32,7 +32,7 @@ buildPerlPackage rec {
   # pgbadger has too many `-Idir` flags on its shebang line on Darwin,
   # causing the build to fail when trying to generate the documentation.
   # Rewrite the -I flags in `use lib` form.
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang ./pgbadger
   '';
 
@@ -46,7 +46,7 @@ buildPerlPackage rec {
     TextCSV_XS
   ];
 
-  nativeBuildInputs = lib.optionals stdenv.isDarwin [ shortenPerlShebang ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ shortenPerlShebang ];
 
   nativeCheckInputs = [
     bzip2
diff --git a/pkgs/tools/misc/piston-cli/default.nix b/pkgs/tools/misc/piston-cli/default.nix
index 68519f2eb643..0309832787a4 100644
--- a/pkgs/tools/misc/piston-cli/default.nix
+++ b/pkgs/tools/misc/piston-cli/default.nix
@@ -27,7 +27,7 @@ python3Packages.buildPythonApplication rec {
   ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Piston api tool";
     homepage = "https://github.com/Shivansh-007/piston-cli";
     license = licenses.mit;
diff --git a/pkgs/tools/misc/powerline-rs/default.nix b/pkgs/tools/misc/powerline-rs/default.nix
index 53077c58848a..77506e95ba0a 100644
--- a/pkgs/tools/misc/powerline-rs/default.nix
+++ b/pkgs/tools/misc/powerline-rs/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-NAhLTrTshCm1QKGaOdD/YaqD6c3oYZwVBst8fvTlScQ=";
 
   nativeBuildInputs = [ pkg-config file perl cmake curl ];
-  buildInputs = [ openssl libssh2 libgit2 libzip ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl libssh2 libgit2 libzip ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   COMPLETION_OUT = "out";
   postInstall = ''
diff --git a/pkgs/tools/misc/pre-commit/default.nix b/pkgs/tools/misc/pre-commit/default.nix
index 0afa9180a47d..4901663d0d02 100644
--- a/pkgs/tools/misc/pre-commit/default.nix
+++ b/pkgs/tools/misc/pre-commit/default.nix
@@ -81,7 +81,7 @@ buildPythonApplication rec {
     "--forked"
   ];
 
-  preCheck = lib.optionalString (!(stdenv.isLinux && stdenv.isAarch64)) ''
+  preCheck = lib.optionalString (!(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64)) ''
     # Disable outline atomics for rust tests on aarch64-linux.
     export RUSTFLAGS="-Ctarget-feature=-outline-atomics"
   '' + ''
diff --git a/pkgs/tools/misc/qflipper/default.nix b/pkgs/tools/misc/qflipper/default.nix
index 7a344e9b0c43..5ad26ab739e7 100644
--- a/pkgs/tools/misc/qflipper/default.nix
+++ b/pkgs/tools/misc/qflipper/default.nix
@@ -62,7 +62,7 @@ mkDerivation {
     qtquickcontrols
     qtquickcontrols2
     qtgraphicaleffects
-  ] ++ lib.optionals (stdenv.isLinux) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [
     qtwayland
   ];
 
@@ -83,7 +83,7 @@ mkDerivation {
 
   postInstall = ''
     mkdir -p $out/bin
-    ${lib.optionalString stdenv.isDarwin ''
+    ${lib.optionalString stdenv.hostPlatform.isDarwin ''
     cp qFlipper.app/Contents/MacOS/qFlipper $out/bin
     ''}
     cp qFlipper-cli $out/bin
@@ -95,7 +95,7 @@ mkDerivation {
   passthru.updateScript = nix-update-script { };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Cross-platform desktop tool to manage your flipper device";
     homepage = "https://flipperzero.one/";
     license = licenses.gpl3Only;
diff --git a/pkgs/tools/misc/qrscan/default.nix b/pkgs/tools/misc/qrscan/default.nix
index 1ad4c526e752..479c6102818a 100644
--- a/pkgs/tools/misc/qrscan/default.nix
+++ b/pkgs/tools/misc/qrscan/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     mainProgram = "qrscan";
     homepage = "https://github.com/sayanarijit/qrscan";
     license = licenses.mit;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = [ maintainers.sayanarijit ];
   };
 }
diff --git a/pkgs/tools/misc/rates/default.nix b/pkgs/tools/misc/rates/default.nix
index d121453bd7d9..c774721eeecc 100644
--- a/pkgs/tools/misc/rates/default.nix
+++ b/pkgs/tools/misc/rates/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-5EcTeMfa1GNp1q60qSgEi/I3298hXUD1Vc1K55XGW4I=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "CLI tool that brings currency exchange rates right into your terminal";
diff --git a/pkgs/tools/misc/remote-exec/default.nix b/pkgs/tools/misc/remote-exec/default.nix
index edf581b183ce..e9edaacd6a27 100644
--- a/pkgs/tools/misc/remote-exec/default.nix
+++ b/pkgs/tools/misc/remote-exec/default.nix
@@ -56,7 +56,7 @@ buildPythonApplication rec {
     pytest-cov-stub
   ];
 
-  disabledTestPaths = lib.optionals stdenv.isDarwin [
+  disabledTestPaths = lib.optionals stdenv.hostPlatform.isDarwin [
     # `watchdog` dependency does not correctly detect fsevents on darwin.
     # this only affects `remote --stream-changes`
     "test/test_file_changes.py"
diff --git a/pkgs/tools/misc/renameutils/default.nix b/pkgs/tools/misc/renameutils/default.nix
index e3ce23eca0a3..e09b7c60f971 100644
--- a/pkgs/tools/misc/renameutils/default.nix
+++ b/pkgs/tools/misc/renameutils/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   patches = [ ./install-exec.patch ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace src/apply.c \
       --replace "command = \"mv\"" "command = \"${coreutils}/bin/mv\"" \
       --replace "command = \"cp\"" "command = \"${coreutils}/bin/cp\""
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ readline ];
 
-  preConfigure = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  preConfigure = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     export ac_cv_func_lstat64=no
   '';
 
diff --git a/pkgs/tools/misc/rlwrap/default.nix b/pkgs/tools/misc/rlwrap/default.nix
index f1c2d6a58971..68baa3318871 100644
--- a/pkgs/tools/misc/rlwrap/default.nix
+++ b/pkgs/tools/misc/rlwrap/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ readline ];
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-error=implicit-function-declaration";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-error=implicit-function-declaration";
 
   meta = with lib; {
     description = "Readline wrapper for console programs";
diff --git a/pkgs/tools/misc/rmlint/default.nix b/pkgs/tools/misc/rmlint/default.nix
index 08a0a0c5e146..829987d6094e 100644
--- a/pkgs/tools/misc/rmlint/default.nix
+++ b/pkgs/tools/misc/rmlint/default.nix
@@ -17,7 +17,7 @@
 , wrapGAppsHook3
 , withGui ? false }:
 
-assert withGui -> !stdenv.isDarwin;
+assert withGui -> !stdenv.hostPlatform.isDarwin;
 
 stdenv.mkDerivation rec {
   pname = "rmlint";
diff --git a/pkgs/tools/misc/routino/default.nix b/pkgs/tools/misc/routino/default.nix
index 75ea2c24ecb8..e430a3063e2c 100644
--- a/pkgs/tools/misc/routino/default.nix
+++ b/pkgs/tools/misc/routino/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   patchFlags = [ "-p0" ];
-  patches = lib.optionals stdenv.isDarwin [
+  patches = lib.optionals stdenv.hostPlatform.isDarwin [
     (fetchpatch {
       url = "https://raw.githubusercontent.com/macports/macports-ports/18fd229516a46e7272003acbe555735b2a902db7/gis/routino/files/patch-Makefile_conf.diff";
       sha256 = "1b7hpa4sizansnwwxq1c031nxwdwh71pg08jl9z9apiab8pjsn53";
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile.conf \
       --subst-var-by PREFIX $out
   '';
diff --git a/pkgs/tools/misc/rtz/default.nix b/pkgs/tools/misc/rtz/default.nix
index 61bf79379ee5..a5f55342a13a 100644
--- a/pkgs/tools/misc/rtz/default.nix
+++ b/pkgs/tools/misc/rtz/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
     bzip2
     openssl
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/tools/misc/rust-motd/default.nix b/pkgs/tools/misc/rust-motd/default.nix
index 26b582e5e944..df79acf5f1c5 100644
--- a/pkgs/tools/misc/rust-motd/default.nix
+++ b/pkgs/tools/misc/rust-motd/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/misc/rustypaste-cli/default.nix b/pkgs/tools/misc/rustypaste-cli/default.nix
index 8f87e508a7be..a59668353739 100644
--- a/pkgs/tools/misc/rustypaste-cli/default.nix
+++ b/pkgs/tools/misc/rustypaste-cli/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-UaOUEuh7NNIhXOKqHEfVRv1hXld7qmdPdazATalXvQU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/misc/sagoin/default.nix b/pkgs/tools/misc/sagoin/default.nix
index 1469bb6e3454..7764781dc01b 100644
--- a/pkgs/tools/misc/sagoin/default.nix
+++ b/pkgs/tools/misc/sagoin/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/tools/misc/screen/default.nix b/pkgs/tools/misc/screen/default.nix
index 29f7fe5ea846..e952fa6f253c 100644
--- a/pkgs/tools/misc/screen/default.nix
+++ b/pkgs/tools/misc/screen/default.nix
@@ -31,8 +31,8 @@ stdenv.mkDerivation rec {
   buildInputs = [
     ncurses
     libxcrypt
-  ] ++ lib.optional stdenv.isLinux pam
-    ++ lib.optional stdenv.isDarwin utmp;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux pam
+    ++ lib.optional stdenv.hostPlatform.isDarwin utmp;
 
   doCheck = true;
 
diff --git a/pkgs/tools/misc/screenfetch/default.nix b/pkgs/tools/misc/screenfetch/default.nix
index e3ad0e5c51c8..c4eb669875d6 100644
--- a/pkgs/tools/misc/screenfetch/default.nix
+++ b/pkgs/tools/misc/screenfetch/default.nix
@@ -7,11 +7,11 @@ let
   path = lib.makeBinPath ([
     coreutils gawk gnused findutils
     gnugrep ncurses bc pciutils
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     procps
     xdpyinfo
     xprop
-  ] ++ lib.optionals stdenv.isDarwin (with darwin; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin; [
     adv_cmds
     DarwinTools
     system_cmds
diff --git a/pkgs/tools/misc/sfeed/default.nix b/pkgs/tools/misc/sfeed/default.nix
index 3217b8f20d52..818f84ed37df 100644
--- a/pkgs/tools/misc/sfeed/default.nix
+++ b/pkgs/tools/misc/sfeed/default.nix
@@ -14,12 +14,12 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "RANLIB:=$(RANLIB)" "SFEED_CURSES_LDFLAGS:=-lncurses" ]
     # use macOS's strlcat() and strlcpy() instead of vendored ones
-    ++ lib.optional stdenv.isDarwin "COMPATOBJ:=";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "COMPATOBJ:=";
 
   installFlags = [ "PREFIX=$(out)" ];
 
   # otherwise does not find SIGWINCH
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-D_DARWIN_C_SOURCE";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-D_DARWIN_C_SOURCE";
 
   meta = with lib; {
     homepage = "https://codemadness.org/sfeed-simple-feed-parser.html";
diff --git a/pkgs/tools/misc/shadowenv/default.nix b/pkgs/tools/misc/shadowenv/default.nix
index 34597142522c..3c18662db5e7 100644
--- a/pkgs/tools/misc/shadowenv/default.nix
+++ b/pkgs/tools/misc/shadowenv/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     installManPage man/man1/shadowenv.1
diff --git a/pkgs/tools/misc/sheldon/default.nix b/pkgs/tools/misc/sheldon/default.nix
index cf48868097b5..3d5e2e84a566 100644
--- a/pkgs/tools/misc/sheldon/default.nix
+++ b/pkgs/tools/misc/sheldon/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-+yTX1wUfVVjsM42X0QliL+0xbzTPheADZibPh/5Czh8=";
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security curl ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security curl ];
   nativeBuildInputs = [ installShellFiles pkg-config ];
 
   # Needs network connection
diff --git a/pkgs/tools/misc/shelldap/default.nix b/pkgs/tools/misc/shelldap/default.nix
index dcc95b24ef48..1b3fd5c5806d 100644
--- a/pkgs/tools/misc/shelldap/default.nix
+++ b/pkgs/tools/misc/shelldap/default.nix
@@ -28,7 +28,7 @@ perlPackages.buildPerlPackage rec {
     YAMLSyck
   ];
 
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
   prePatch = ''
     touch Makefile.PL
@@ -40,7 +40,7 @@ perlPackages.buildPerlPackage rec {
     runHook postInstall
   '';
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/shelldap
   '';
 
diff --git a/pkgs/tools/misc/skim/default.nix b/pkgs/tools/misc/skim/default.nix
index bb51fd8899bd..4e09f021cc5f 100644
--- a/pkgs/tools/misc/skim/default.nix
+++ b/pkgs/tools/misc/skim/default.nix
@@ -43,7 +43,7 @@ rustPlatform.buildRustPackage rec {
   '';
 
   # https://github.com/lotabout/skim/issues/440
-  doCheck = !stdenv.isAarch64;
+  doCheck = !stdenv.hostPlatform.isAarch64;
 
   meta = with lib; {
     description = "Command-line fuzzy finder written in Rust";
diff --git a/pkgs/tools/misc/sshx/default.nix b/pkgs/tools/misc/sshx/default.nix
index 1daddeb8182a..0929703288e0 100644
--- a/pkgs/tools/misc/sshx/default.nix
+++ b/pkgs/tools/misc/sshx/default.nix
@@ -27,7 +27,7 @@ let
 
       nativeBuildInputs = [ protobuf ];
 
-      buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+      buildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
       cargoBuildFlags = [ "--package" pname ];
 
diff --git a/pkgs/tools/misc/star-history/default.nix b/pkgs/tools/misc/star-history/default.nix
index bb84b843a9ea..e8d96eb4249b 100644
--- a/pkgs/tools/misc/star-history/default.nix
+++ b/pkgs/tools/misc/star-history/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/tools/misc/starry/default.nix b/pkgs/tools/misc/starry/default.nix
index a59fb3127f17..cb6535baf3ac 100644
--- a/pkgs/tools/misc/starry/default.nix
+++ b/pkgs/tools/misc/starry/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/misc/starship/default.nix b/pkgs/tools/misc/starship/default.nix
index 37d38016b882..587d07eaf5bd 100644
--- a/pkgs/tools/misc/starship/default.nix
+++ b/pkgs/tools/misc/starship/default.nix
@@ -24,12 +24,12 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles cmake ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security Foundation Cocoa ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security Foundation Cocoa ];
 
-  NIX_LDFLAGS = lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ "-framework" "AppKit" ];
+  NIX_LDFLAGS = lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ "-framework" "AppKit" ];
 
   # tries to access HOME only in aarch64-darwin environment when building mac-notification-sys
-  preBuild = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  preBuild = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     export HOME=$TMPDIR
   '';
 
diff --git a/pkgs/tools/misc/synth/default.nix b/pkgs/tools/misc/synth/default.nix
index 688454c8ded1..4977372ee4ee 100644
--- a/pkgs/tools/misc/synth/default.nix
+++ b/pkgs/tools/misc/synth/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-i2Pp9sfTBth3DtrQ99Vw+KLnGECrkqtlRNAKiwSWf48=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Security
   ];
diff --git a/pkgs/tools/misc/szyszka/default.nix b/pkgs/tools/misc/szyszka/default.nix
index 980b37a910df..8bd133e6dae0 100644
--- a/pkgs/tools/misc/szyszka/default.nix
+++ b/pkgs/tools/misc/szyszka/default.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
     atk
     gdk-pixbuf
     gtk4
-  ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Foundation
   ]);
 
diff --git a/pkgs/tools/misc/tab-rs/default.nix b/pkgs/tools/misc/tab-rs/default.nix
index 6298d84c41fd..7d3721acb3c4 100644
--- a/pkgs/tools/misc/tab-rs/default.nix
+++ b/pkgs/tools/misc/tab-rs/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-56gy9AH3i4OSvExMuR3n/2hF5pJgbn5JJpxZLXKfu2w=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ IOKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   # many tests are failing
   doCheck = false;
@@ -24,6 +24,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.mit;
     maintainers = [ ];
     mainProgram = "tab";
-    broken = (stdenv.isDarwin && stdenv.isAarch64); # Added 2023-11-13
+    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64); # Added 2023-11-13
   };
 }
diff --git a/pkgs/tools/misc/tealdeer/default.nix b/pkgs/tools/misc/tealdeer/default.nix
index 9ca82d8f1bec..c3fa408aabed 100644
--- a/pkgs/tools/misc/tealdeer/default.nix
+++ b/pkgs/tools/misc/tealdeer/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-VeJsCWU7sJy88uvGGjpuGRzsAgBRvzOYU1FwpImpiLk=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   nativeBuildInputs = [ installShellFiles ];
 
diff --git a/pkgs/tools/misc/tere/default.nix b/pkgs/tools/misc/tere/default.nix
index b362ff418375..905c197cc732 100644
--- a/pkgs/tools/misc/tere/default.nix
+++ b/pkgs/tools/misc/tere/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage {
     ncurses
   ];
 
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     # Unexplained fail
     # https://github.com/NixOS/nixpkgs/pull/298527#issuecomment-2053758845
     "--skip=first_run_prompt_accept"
diff --git a/pkgs/tools/misc/timidity/default.nix b/pkgs/tools/misc/timidity/default.nix
index 26f84e383c48..ce6e0c7ae8f0 100644
--- a/pkgs/tools/misc/timidity/default.nix
+++ b/pkgs/tools/misc/timidity/default.nix
@@ -28,13 +28,13 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ pkg-config ]
-    ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [ memstreamHook ];
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [ memstreamHook ];
   buildInputs = [
     libjack2
     ncurses
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     alsa-lib
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreAudio
     libobjc
   ];
@@ -43,12 +43,12 @@ stdenv.mkDerivation rec {
     "--enable-ncurses"
     "lib_cv_va_copy=yes"
     "lib_cv___va_copy=yes"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--enable-audio=oss,alsa,jack"
     "--enable-alsaseq"
     "--with-default-output=alsa"
     "lib_cv_va_val_copy=yes"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "--enable-audio=darwin,jack"
     "lib_cv_va_val_copy=no"
     "timidity_cv_ccoption_rdynamic=yes"
@@ -84,7 +84,7 @@ stdenv.mkDerivation rec {
     tar --strip-components=1 -xf $instruments -C $out/share/timidity/
   '';
   # This fixup step is unnecessary and fails on Darwin
-  dontRewriteSymlinks = stdenv.isDarwin;
+  dontRewriteSymlinks = stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     homepage = "https://sourceforge.net/projects/timidity/";
diff --git a/pkgs/tools/misc/tmux-sessionizer/default.nix b/pkgs/tools/misc/tmux-sessionizer/default.nix
index b6a3682ec757..d8749c4115c8 100644
--- a/pkgs/tools/misc/tmux-sessionizer/default.nix
+++ b/pkgs/tools/misc/tmux-sessionizer/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage {
   OPENSSL_NO_VENDOR = 1;
 
   nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Fastest way to manage projects as tmux sessions";
diff --git a/pkgs/tools/misc/tmux/default.nix b/pkgs/tools/misc/tmux/default.nix
index af381a062259..d8b40913c9c8 100644
--- a/pkgs/tools/misc/tmux/default.nix
+++ b/pkgs/tools/misc/tmux/default.nix
@@ -10,7 +10,7 @@
 , runCommand
 , withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
 , withUtf8proc ? true, utf8proc # gets Unicode updates faster than glibc
-, withUtempter ? stdenv.isLinux && !stdenv.hostPlatform.isMusl, libutempter
+, withUtempter ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isMusl, libutempter
 , withSixel ? true
 }:
 
@@ -88,13 +88,13 @@ stdenv.mkDerivation (finalAttrs: {
   postInstall = ''
     mkdir -p $out/share/bash-completion/completions
     cp -v ${bashCompletion}/completions/tmux $out/share/bash-completion/completions/tmux
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir $out/nix-support
     echo "${finalAttrs.passthru.terminfo}" >> $out/nix-support/propagated-user-env-packages
   '';
 
   passthru = {
-    terminfo = runCommand "tmux-terminfo" { nativeBuildInputs = [ ncurses ]; } (if stdenv.isDarwin then ''
+    terminfo = runCommand "tmux-terminfo" { nativeBuildInputs = [ ncurses ]; } (if stdenv.hostPlatform.isDarwin then ''
       mkdir -p $out/share/terminfo/74
       cp -v ${ncurses}/share/terminfo/74/tmux $out/share/terminfo/74
       # macOS ships an old version (5.7) of ncurses which does not include tmux-256color so we need to provide it from our ncurses.
diff --git a/pkgs/tools/misc/toastify/default.nix b/pkgs/tools/misc/toastify/default.nix
index b244aec493ac..6fde17977ebe 100644
--- a/pkgs/tools/misc/toastify/default.nix
+++ b/pkgs/tools/misc/toastify/default.nix
@@ -13,11 +13,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Ps2pRLpPxw+OS1ungQtVQ8beoKpc8pjzQEndMNni08k=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Cocoa
   ];
 
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export HOME=$(mktemp -d)
   '';
 
diff --git a/pkgs/tools/misc/topgrade/default.nix b/pkgs/tools/misc/topgrade/default.nix
index 38e1f0d95c1a..70402b22df7f 100644
--- a/pkgs/tools/misc/topgrade/default.nix
+++ b/pkgs/tools/misc/topgrade/default.nix
@@ -25,13 +25,13 @@ rustPlatform.buildRustPackage rec {
     installShellFiles
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
   ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-framework"
     "AppKit"
   ]);
diff --git a/pkgs/tools/misc/toybox/default.nix b/pkgs/tools/misc/toybox/default.nix
index 4ef5279ef476..99167c87fa84 100644
--- a/pkgs/tools/misc/toybox/default.nix
+++ b/pkgs/tools/misc/toybox/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   depsBuildBuild = optionals (stdenv.hostPlatform != stdenv.buildPlatform) [ buildPackages.stdenv.cc ];
   buildInputs = [
     libxcrypt
-  ] ++ optionals stdenv.isDarwin [
+  ] ++ optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ] ++ optionals (enableStatic && stdenv.cc.libc ? static) [
     stdenv.cc.libc
@@ -40,10 +40,10 @@ stdenv.mkDerivation rec {
     make ${if enableMinimal then
       "allnoconfig"
     else
-      if stdenv.isFreeBSD then
+      if stdenv.hostPlatform.isFreeBSD then
         "freebsd_defconfig"
       else
-        if stdenv.isDarwin then
+        if stdenv.hostPlatform.isDarwin then
           "macos_defconfig"
         else
           "defconfig"
diff --git a/pkgs/tools/misc/trackma/default.nix b/pkgs/tools/misc/trackma/default.nix
index 6ecf2723f00b..4ae9306f28fb 100644
--- a/pkgs/tools/misc/trackma/default.nix
+++ b/pkgs/tools/misc/trackma/default.nix
@@ -45,7 +45,7 @@ python3.pkgs.buildPythonApplication rec {
     ++ lib.optionals withQT [ pyqt5 ]
     ++ lib.optionals withGTK [ pycairo pygobject3 ]
     ++ lib.optionals withCurses [ urwid ]
-    ++ lib.optionals stdenv.isLinux [ pydbus pyinotify ]
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pydbus pyinotify ]
     ++ lib.optionals (withGTK || withQT) [ pillow ]);
 
   dontWrapQtApps = true;
diff --git a/pkgs/tools/misc/tty-clock/default.nix b/pkgs/tools/misc/tty-clock/default.nix
index 0abb0c668be0..f5d70cd2071f 100644
--- a/pkgs/tools/misc/tty-clock/default.nix
+++ b/pkgs/tools/misc/tty-clock/default.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   makeFlags = [ "PREFIX=$(out)" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://github.com/xorg62/tty-clock";
     license = licenses.bsd3;
     description = "Digital clock in ncurses";
diff --git a/pkgs/tools/misc/twm/default.nix b/pkgs/tools/misc/twm/default.nix
index bb963d5d1d0e..3625ceef80a9 100644
--- a/pkgs/tools/misc/twm/default.nix
+++ b/pkgs/tools/misc/twm/default.nix
@@ -23,7 +23,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-gJ5go9V8c97pQZICUD1ksLJhOyJXyVXAWssH3fhrRVQ=";
 
   nativeBuildInputs = [ pkg-config installShellFiles ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd twm \
diff --git a/pkgs/tools/misc/usbimager/default.nix b/pkgs/tools/misc/usbimager/default.nix
index 2d339fabc3f7..11a9162af2f2 100644
--- a/pkgs/tools/misc/usbimager/default.nix
+++ b/pkgs/tools/misc/usbimager/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitLab, pkg-config, wrapGAppsHook3
 , withLibui ? true, gtk3
-, withUdisks ? stdenv.isLinux, udisks, glib
+, withUdisks ? stdenv.hostPlatform.isLinux, udisks, glib
 , libX11 }:
 
 stdenv.mkDerivation rec {
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     # feel free add them if you have a machine to test
     platforms = with platforms; linux;
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
     mainProgram = "usbimager";
   };
 }
diff --git a/pkgs/tools/misc/uutils-coreutils/default.nix b/pkgs/tools/misc/uutils-coreutils/default.nix
index 033692364752..a71567b59038 100644
--- a/pkgs/tools/misc/uutils-coreutils/default.nix
+++ b/pkgs/tools/misc/uutils-coreutils/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ rustPlatform.cargoSetupHook sphinx ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security libiconv ];
 
   makeFlags = [
     "CARGO=${cargo}/bin/cargo"
diff --git a/pkgs/tools/misc/uwufetch/default.nix b/pkgs/tools/misc/uwufetch/default.nix
index 4dba7dac8038..ce5e378b9ac7 100644
--- a/pkgs/tools/misc/uwufetch/default.nix
+++ b/pkgs/tools/misc/uwufetch/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     # fix command_path for package manager (nix-store)
     substituteInPlace fetch.c \
       --replace "/usr/bin" "/run/current-system/sw/bin"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace "local/bin" "bin" \
       --replace "local/lib" "lib" \
diff --git a/pkgs/tools/misc/uwuify/default.nix b/pkgs/tools/misc/uwuify/default.nix
index 4a3411d05a38..a7380bc8b1f7 100644
--- a/pkgs/tools/misc/uwuify/default.nix
+++ b/pkgs/tools/misc/uwuify/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   cargoHash = "sha256-1BoB7K/dWy3AbogvHIDLrdPD7K54EISvn4RVU5RLTi4=";
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   meta = with lib; {
     description = "Fast text uwuifier";
diff --git a/pkgs/tools/misc/vector/default.nix b/pkgs/tools/misc/vector/default.nix
index 3b08a82308c6..e93603d044d1 100644
--- a/pkgs/tools/misc/vector/default.nix
+++ b/pkgs/tools/misc/vector/default.nix
@@ -88,8 +88,8 @@ rustPlatform.buildRustPackage {
       rdkafka
       zstd
     ]
-    ++ lib.optionals stdenv.isLinux [ rust-jemalloc-sys-unprefixed ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ rust-jemalloc-sys-unprefixed ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       rust-jemalloc-sys
       Security
       libiconv
diff --git a/pkgs/tools/misc/vimv-rs/default.nix b/pkgs/tools/misc/vimv-rs/default.nix
index 2b419e5403c0..780af1846ff1 100644
--- a/pkgs/tools/misc/vimv-rs/default.nix
+++ b/pkgs/tools/misc/vimv-rs/default.nix
@@ -12,7 +12,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-rYQxIttuGBGEkYkFtSBl8ce1I/Akm6FxeITJcaIeP6M=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Foundation ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Foundation ];
 
   meta = with lib; {
     description = "Command line utility for batch-renaming files";
diff --git a/pkgs/tools/misc/vrc-get/default.nix b/pkgs/tools/misc/vrc-get/default.nix
index dac2f34dbaca..a458e6c30953 100644
--- a/pkgs/tools/misc/vrc-get/default.nix
+++ b/pkgs/tools/misc/vrc-get/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   cargoHash = "sha256-WFGY5osZIEYeHQchvuE3ddeqh2wzfZNV+SGqW08zYDI=";
 
diff --git a/pkgs/tools/misc/wagyu/default.nix b/pkgs/tools/misc/wagyu/default.nix
index 0eb71743f064..6200ee77d613 100644
--- a/pkgs/tools/misc/wagyu/default.nix
+++ b/pkgs/tools/misc/wagyu/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-vseTtok0E0ddg9ALQ1ql3NPPxirfyMPHOSWsM2qu2jU=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Rust library for generating cryptocurrency wallets";
diff --git a/pkgs/tools/misc/watchexec/default.nix b/pkgs/tools/misc/watchexec/default.nix
index cd7381243cc4..0d04a21219bc 100644
--- a/pkgs/tools/misc/watchexec/default.nix
+++ b/pkgs/tools/misc/watchexec/default.nix
@@ -15,9 +15,9 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Cocoa AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa AppKit ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework AppKit";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework AppKit";
 
   checkFlags = [ "--skip=help" "--skip=help_short" ];
 
diff --git a/pkgs/tools/misc/websocat/default.nix b/pkgs/tools/misc/websocat/default.nix
index 786062cfffb9..fd8841b96bd0 100644
--- a/pkgs/tools/misc/websocat/default.nix
+++ b/pkgs/tools/misc/websocat/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config makeWrapper ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   buildFeatures = [ "ssl" ];
 
diff --git a/pkgs/tools/misc/wv2/default.nix b/pkgs/tools/misc/wv2/default.nix
index 3a7bd5d395a6..8a4ccaed896c 100644
--- a/pkgs/tools/misc/wv2/default.nix
+++ b/pkgs/tools/misc/wv2/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = lib.optionals stdenv.cc.isClang [ (lib.cmakeFeature "CMAKE_CXX_STANDARD" "14") ];
 
   # Linking gobject explicitly fixes missing symbols (such as missing `_g_object_unref`) on Darwin.
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export NIX_LDFLAGS+=" $(pkg-config gobject-2.0 --libs)"
   '';
 
diff --git a/pkgs/tools/misc/xburst-tools/default.nix b/pkgs/tools/misc/xburst-tools/default.nix
index 093e7152bbcf..a94f9681a05c 100644
--- a/pkgs/tools/misc/xburst-tools/default.nix
+++ b/pkgs/tools/misc/xburst-tools/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation {
     lib.optional (gccCross != null) gccCross;
 
   meta = {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Qi tools to access the Ben Nanonote USB_BOOT mode";
     license = lib.licenses.gpl3;
     homepage = "http://www.linux-mtd.infradead.org/";
diff --git a/pkgs/tools/misc/xxv/default.nix b/pkgs/tools/misc/xxv/default.nix
index 3973f8d096ac..eaa27e34d9d3 100644
--- a/pkgs/tools/misc/xxv/default.nix
+++ b/pkgs/tools/misc/xxv/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-S8IKBXREJ+0z4Qz9i3RH52btg1Mpk6GjKIJf4ivdt14=";
 
   buildInputs = lib.optionals useNcurses [ ncurses ]
-  ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security ])
+  ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security ])
   ;
 
   # I'm picking pancurses for Windows simply because that's the example given in Cursive's
diff --git a/pkgs/tools/misc/yubikey-manager/default.nix b/pkgs/tools/misc/yubikey-manager/default.nix
index 6243a2e4668c..5523b6468969 100644
--- a/pkgs/tools/misc/yubikey-manager/default.nix
+++ b/pkgs/tools/misc/yubikey-manager/default.nix
@@ -20,7 +20,7 @@ python3Packages.buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace "ykman/pcsc/__init__.py" \
-      --replace 'pkill' '${if stdenv.isLinux then procps else "/usr"}/bin/pkill'
+      --replace 'pkill' '${if stdenv.hostPlatform.isLinux then procps else "/usr"}/bin/pkill'
   '';
 
   nativeBuildInputs = with python3Packages; [
diff --git a/pkgs/tools/misc/yubikey-personalization-gui/default.nix b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
index 347221ceedf8..6493c7244c3b 100644
--- a/pkgs/tools/misc/yubikey-personalization-gui/default.nix
+++ b/pkgs/tools/misc/yubikey-personalization-gui/default.nix
@@ -34,7 +34,7 @@ mkDerivation rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://developers.yubico.com/yubikey-personalization-gui";
     description = "QT based cross-platform utility designed to facilitate reconfiguration of the Yubikey";
     license = licenses.bsd2;
diff --git a/pkgs/tools/misc/zellij/default.nix b/pkgs/tools/misc/zellij/default.nix
index 105d35349eb9..e069d0c8d87f 100644
--- a/pkgs/tools/misc/zellij/default.nix
+++ b/pkgs/tools/misc/zellij/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
     DiskArbitration
     Foundation
diff --git a/pkgs/tools/misc/zoxide/default.nix b/pkgs/tools/misc/zoxide/default.nix
index 5b2d00f7538e..5c1ba44d156d 100644
--- a/pkgs/tools/misc/zoxide/default.nix
+++ b/pkgs/tools/misc/zoxide/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   postPatch = lib.optionalString withFzf ''
     substituteInPlace src/util.rs \
diff --git a/pkgs/tools/networking/aircrack-ng/default.nix b/pkgs/tools/networking/aircrack-ng/default.nix
index 6bfd3136dc98..b1ee70125739 100644
--- a/pkgs/tools/networking/aircrack-ng/default.nix
+++ b/pkgs/tools/networking/aircrack-ng/default.nix
@@ -34,7 +34,7 @@
 , useGcrypt ? false
 , enableAirolib ? true
 , enableRegex ? true
-, useAirpcap ? stdenv.isCygwin
+, useAirpcap ? stdenv.hostPlatform.isCygwin
 }:
 let
   airpcap-sdk = fetchzip {
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-niQDwiqi5GtBW5HIn0endnqPb/MqllcjsjXw4pTyFKY=";
   };
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace lib/osdep/linux.c --replace-warn /usr/local/bin ${lib.escapeShellArg (lib.makeBinPath [
       wirelesstools
     ])}
@@ -72,15 +72,15 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config makeWrapper autoreconfHook ];
   buildInputs =
     lib.singleton (if useGcrypt then libgcrypt else openssl)
-    ++ lib.optionals stdenv.isLinux [ libpcap zlib libnl iw ethtool pciutils ]
-    ++ lib.optional (stdenv.isCygwin && stdenv.isClang) libiconv
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libpcap zlib libnl iw ethtool pciutils ]
+    ++ lib.optional (stdenv.hostPlatform.isCygwin && stdenv.hostPlatform.isClang) libiconv
     ++ lib.optional enableAirolib sqlite
     ++ lib.optional enableRegex pcre2
     ++ lib.optional useAirpcap airpcap-sdk;
 
   nativeCheckInputs = [ cmocka expect ];
 
-  postFixup = lib.optionalString stdenv.isLinux ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram "$out/bin/airmon-ng" --prefix PATH : ${lib.escapeShellArg (lib.makeBinPath [
       ethtool
       iw
@@ -90,7 +90,7 @@ stdenv.mkDerivation rec {
   '';
 
   installCheckTarget = "integration";
-  nativeInstallCheckInputs = [ cmocka expect ] ++ lib.optionals stdenv.isLinux [ tcpdump hostapd wpa_supplicant screen ];
+  nativeInstallCheckInputs = [ cmocka expect ] ++ lib.optionals stdenv.hostPlatform.isLinux [ tcpdump hostapd wpa_supplicant screen ];
 
   meta = {
     description = "WiFi security auditing tools suite";
diff --git a/pkgs/tools/networking/anevicon/default.nix b/pkgs/tools/networking/anevicon/default.nix
index 961127580500..c84f0e75d3d6 100644
--- a/pkgs/tools/networking/anevicon/default.nix
+++ b/pkgs/tools/networking/anevicon/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Id/vjne73w+bDVA8wT7fV1DMXeGtYbSAdwl07UfYJbw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   cargoPatches = [
     # Add Cargo.lock file, https://github.com/rozgo/anevicon/pull/1
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   # Tries to send large UDP packets that Darwin rejects.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "UDP-based load generator";
diff --git a/pkgs/tools/networking/aria2/default.nix b/pkgs/tools/networking/aria2/default.nix
index 97eb911baef1..f1864ed72dd2 100644
--- a/pkgs/tools/networking/aria2/default.nix
+++ b/pkgs/tools/networking/aria2/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config autoreconfHook sphinx ];
 
   buildInputs = [ gnutls c-ares libxml2 sqlite zlib libssh2 ] ++
-    lib.optional stdenv.isDarwin Security;
+    lib.optional stdenv.hostPlatform.isDarwin Security;
 
   outputs = [ "bin" "dev" "out" "doc" "man" ];
 
diff --git a/pkgs/tools/networking/assh/default.nix b/pkgs/tools/networking/assh/default.nix
index 9d13a323357b..43ed2dc16c8a 100644
--- a/pkgs/tools/networking/assh/default.nix
+++ b/pkgs/tools/networking/assh/default.nix
@@ -26,7 +26,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ makeWrapper ];
 
-  nativeCheckInputs = lib.optionals stdenv.isDarwin [ ps ];
+  nativeCheckInputs = lib.optionals stdenv.hostPlatform.isDarwin [ ps ];
 
   postInstall = ''
     wrapProgram "$out/bin/assh" \
diff --git a/pkgs/tools/networking/atinout/default.nix b/pkgs/tools/networking/atinout/default.nix
index 64d13a7b14ea..1155b2b876bb 100644
--- a/pkgs/tools/networking/atinout/default.nix
+++ b/pkgs/tools/networking/atinout/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "0.9.2-alpha";
 
   env.NIX_CFLAGS_COMPILE = lib.optionalString (!stdenv.cc.isClang) "-Werror=implicit-fallthrough=0";
-  LANG = if stdenv.isDarwin then "en_US.UTF-8" else "C.UTF-8";
+  LANG = if stdenv.hostPlatform.isDarwin then "en_US.UTF-8" else "C.UTF-8";
   nativeBuildInputs = [ ronn mount ];
 
   src = fetchgit {
diff --git a/pkgs/tools/networking/bandwhich/default.nix b/pkgs/tools/networking/bandwhich/default.nix
index 550266b9da99..0c5a6d20a694 100644
--- a/pkgs/tools/networking/bandwhich/default.nix
+++ b/pkgs/tools/networking/bandwhich/default.nix
@@ -25,10 +25,10 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # 10 passed; 47 failed https://hydra.nixos.org/build/148943783/nixlog/1
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   postPatch = ''
     ln --force -s ${./Cargo.lock} Cargo.lock
diff --git a/pkgs/tools/networking/bitmask-vpn/default.nix b/pkgs/tools/networking/bitmask-vpn/default.nix
index 60988da176a2..264bddf5b0f9 100644
--- a/pkgs/tools/networking/bitmask-vpn/default.nix
+++ b/pkgs/tools/networking/bitmask-vpn/default.nix
@@ -84,7 +84,7 @@ buildGoModule rec {
 
     patchShebangs gui/build.sh
     wrapPythonProgramsIn branding/scripts
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace pkg/helper/linux.go \
       --replace /usr/sbin/openvpn ${openvpn}/bin/openvpn
     substituteInPlace pkg/vpn/launcher_linux.go \
@@ -103,7 +103,7 @@ buildGoModule rec {
     qttools
     which
     wrapQtAppsHook
-  ] ++ lib.optional (!stdenv.isLinux) qtinstaller;
+  ] ++ lib.optional (!stdenv.hostPlatform.isLinux) qtinstaller;
 
   buildInputs = [
     qtbase
@@ -112,7 +112,7 @@ buildGoModule rec {
     qtgraphicaleffects
     qtquickcontrols
     qtquickcontrols2
-  ] ++ lib.optionals stdenv.isDarwin [ CoreFoundation Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation Security ];
   # FIXME: building on Darwin currently fails
   # due to missing debug symbols for Qt,
   # this should be fixable once darwin.apple_sdk >= 10.13
@@ -142,7 +142,7 @@ buildGoModule rec {
     (cd branding/templates/debian && ${python3Packages.python}/bin/python3 generate.py)
     install -m 444 -D branding/templates/debian/app.desktop $out/share/applications/${pname}.desktop
     install -m 444 -D providers/${provider}/assets/icon.svg $out/share/icons/hicolor/scalable/apps/${pname}.svg
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     install -m 444 -D -t $out/share/polkit-1/actions ${bitmask-root}/share/polkit-1/actions/se.leap.bitmask.policy
   '';
 
diff --git a/pkgs/tools/networking/bore-cli/default.nix b/pkgs/tools/networking/bore-cli/default.nix
index 30a0463ace08..d182fd22b5e1 100644
--- a/pkgs/tools/networking/bore-cli/default.nix
+++ b/pkgs/tools/networking/bore-cli/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-PZDie/lBextHu8EV/butg2pJZFfizeOEdD21I3XFoHk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/networking/bore/default.nix b/pkgs/tools/networking/bore/default.nix
index 9af98878b854..4d67cb4c94d7 100644
--- a/pkgs/tools/networking/bore/default.nix
+++ b/pkgs/tools/networking/bore/default.nix
@@ -15,16 +15,16 @@ rustPlatform.buildRustPackage rec {
   cargoBuildFlags = [ "-p" pname ];
 
   # error[E0793]: reference to packed field is unaligned
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   # FIXME can’t test --all-targets and --doc in a single invocation
   cargoTestFlags = [ "--all-targets" "--workspace" ];
   checkFeatures = [ "std" ];
 
   nativeBuildInputs = [ installShellFiles ]
-    ++ lib.optional stdenv.isDarwin rustPlatform.bindgenHook;
+    ++ lib.optional stdenv.hostPlatform.isDarwin rustPlatform.bindgenHook;
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Libsystem
     SystemConfiguration
   ];
@@ -46,6 +46,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.isc;
     maintainers = [ ];
     mainProgram = "bore";
-    broken = stdenv.isDarwin; # bindgen fails on: "in6_addr_union_(...)" is not a valid Ident
+    broken = stdenv.hostPlatform.isDarwin; # bindgen fails on: "in6_addr_union_(...)" is not a valid Ident
   };
 }
diff --git a/pkgs/tools/networking/boringtun/default.nix b/pkgs/tools/networking/boringtun/default.nix
index e2a6a7a3b6e0..30bb243454f8 100644
--- a/pkgs/tools/networking/boringtun/default.nix
+++ b/pkgs/tools/networking/boringtun/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-WFKlfuZGVU5KA57ZYjsIrIwE4B5TeaU5IKt9BNEnWyY=";
 
-  buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.Security;
 
   # Testing this project requires sudo, Docker and network access, etc.
   doCheck = false;
diff --git a/pkgs/tools/networking/cfspeedtest/default.nix b/pkgs/tools/networking/cfspeedtest/default.nix
index 61bdad229863..f89e8e677c53 100644
--- a/pkgs/tools/networking/cfspeedtest/default.nix
+++ b/pkgs/tools/networking/cfspeedtest/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
     description = "Unofficial CLI for speed.cloudflare.com";
     homepage = "https://github.com/code-inflation/cfspeedtest";
     license = with licenses; [ mit ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ colemickens ];
     mainProgram = "cfspeedtest";
   };
diff --git a/pkgs/tools/networking/chrony/default.nix b/pkgs/tools/networking/chrony/default.nix
index 4b8b8e8b9708..b18cc5642285 100644
--- a/pkgs/tools/networking/chrony/default.nix
+++ b/pkgs/tools/networking/chrony/default.nix
@@ -18,13 +18,13 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ gnutls libedit nspr nss readline texinfo ]
-    ++ lib.optionals stdenv.isLinux [ libcap libseccomp pps-tools ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap libseccomp pps-tools ];
 
   configureFlags = [
     "--enable-ntp-signd"
     "--sbindir=$(out)/bin"
     "--chronyrundir=/run/chrony"
-  ] ++ lib.optional stdenv.isLinux "--enable-scfilter";
+  ] ++ lib.optional stdenv.hostPlatform.isLinux "--enable-scfilter";
 
   patches = [
     # Cleanup the installation script
diff --git a/pkgs/tools/networking/cjdns/default.nix b/pkgs/tools/networking/cjdns/default.nix
index 85705a27231f..c60e853a7d21 100644
--- a/pkgs/tools/networking/cjdns/default.nix
+++ b/pkgs/tools/networking/cjdns/default.nix
@@ -45,7 +45,7 @@ rustPlatform.buildRustPackage rec {
     pkg-config
   ] ++
     # for flock
-    lib.optional stdenv.isLinux util-linux;
+    lib.optional stdenv.hostPlatform.isLinux util-linux;
 
   buildInputs = [
     libuv
@@ -70,6 +70,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ ehmry ];
     platforms = platforms.linux;
-    broken = stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/tools/networking/cntlm/default.nix b/pkgs/tools/networking/cntlm/default.nix
index b2a4193ff049..8750967107ef 100644
--- a/pkgs/tools/networking/cntlm/default.nix
+++ b/pkgs/tools/networking/cntlm/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ which ];
 
-  preConfigure = lib.optionalString stdenv.isDarwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace configure --replace "xlc_r gcc" "xlc_r gcc $CC"
     substitute Makefile Makefile.$CC --replace "CC=gcc" "CC=$CC"
   '';
diff --git a/pkgs/tools/networking/cocom/default.nix b/pkgs/tools/networking/cocom/default.nix
index 7281583b17c1..ad6ab959e6e2 100644
--- a/pkgs/tools/networking/cocom/default.nix
+++ b/pkgs/tools/networking/cocom/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-y5/xOP5YzqsqBxG9c4r9ORyaEf5Ed6D10NFCaKQPchI=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # Tests require network access
   doCheck = false;
diff --git a/pkgs/tools/networking/croc/test-local-relay.nix b/pkgs/tools/networking/croc/test-local-relay.nix
index 90d335885e7f..f0a66fcaba82 100644
--- a/pkgs/tools/networking/croc/test-local-relay.nix
+++ b/pkgs/tools/networking/croc/test-local-relay.nix
@@ -28,6 +28,6 @@ stdenv.mkDerivation {
 
   meta = {
     timeout = 300;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/networking/curl-impersonate/chrome/default.nix b/pkgs/tools/networking/curl-impersonate/chrome/default.nix
index fd97c69b31c5..0ab3085749f3 100644
--- a/pkgs/tools/networking/curl-impersonate/chrome/default.nix
+++ b/pkgs/tools/networking/curl-impersonate/chrome/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs =
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       # Must come first so that it shadows the 'libtool' command but leaves 'libtoolize'
       cctools
     ]
@@ -77,7 +77,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--with-ca-bundle=${
-      if stdenv.isDarwin then "/etc/ssl/cert.pem" else "/etc/ssl/certs/ca-certificates.crt"
+      if stdenv.hostPlatform.isDarwin then "/etc/ssl/cert.pem" else "/etc/ssl/certs/ca-certificates.crt"
     }"
     "--with-ca-path=${cacert}/etc/ssl/certs"
   ];
diff --git a/pkgs/tools/networking/curl-impersonate/firefox/default.nix b/pkgs/tools/networking/curl-impersonate/firefox/default.nix
index 157aedab489a..73b4458ec8db 100644
--- a/pkgs/tools/networking/curl-impersonate/firefox/default.nix
+++ b/pkgs/tools/networking/curl-impersonate/firefox/default.nix
@@ -62,7 +62,7 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs =
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       # Must come first so that it shadows the 'libtool' command but leaves 'libtoolize'
       cctools
     ]
@@ -87,7 +87,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
     "--with-ca-bundle=${
-      if stdenv.isDarwin then "/etc/ssl/cert.pem" else "/etc/ssl/certs/ca-certificates.crt"
+      if stdenv.hostPlatform.isDarwin then "/etc/ssl/cert.pem" else "/etc/ssl/certs/ca-certificates.crt"
     }"
     "--with-ca-path=${cacert}/etc/ssl/certs"
   ];
diff --git a/pkgs/tools/networking/curl/default.nix b/pkgs/tools/networking/curl/default.nix
index 033657371747..567ddcbf7d02 100644
--- a/pkgs/tools/networking/curl/default.nix
+++ b/pkgs/tools/networking/curl/default.nix
@@ -21,7 +21,7 @@
 , opensslSupport ? zlibSupport, openssl
 , pslSupport ? false, libpsl
 , rtmpSupport ? false, rtmpdump
-, scpSupport ? zlibSupport && !stdenv.isSunOS && !stdenv.isCygwin, libssh2
+, scpSupport ? zlibSupport && !stdenv.hostPlatform.isSunOS && !stdenv.hostPlatform.isCygwin, libssh2
 , wolfsslSupport ? false, wolfssl
 , rustlsSupport ? false, rustls-ffi
 , zlibSupport ? true, zlib
@@ -76,7 +76,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   outputs = [ "bin" "dev" "out" "man" "devdoc" ];
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   enableParallelBuilding = true;
 
@@ -105,7 +105,7 @@ stdenv.mkDerivation (finalAttrs: {
     lib.optional rustlsSupport rustls-ffi ++
     lib.optional zlibSupport zlib ++
     lib.optional zstdSupport zstd ++
-    lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       CoreFoundation
       CoreServices
       SystemConfiguration
@@ -152,16 +152,16 @@ stdenv.mkDerivation (finalAttrs: {
     ++ lib.optionals stdenv.hostPlatform.isWindows [
       "--disable-shared"
       "--enable-static"
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       # Disable default CA bundle, use NIX_SSL_CERT_FILE or fallback to nss-cacert from the default profile.
       # Without this curl might detect /etc/ssl/cert.pem at build time on macOS, causing curl to ignore NIX_SSL_CERT_FILE.
       "--without-ca-bundle"
       "--without-ca-path"
     ] ++ lib.optionals (!gnutlsSupport && !opensslSupport && !wolfsslSupport && !rustlsSupport) [
       "--without-ssl"
-    ] ++ lib.optionals (rustlsSupport && !stdenv.isDarwin) [
+    ] ++ lib.optionals (rustlsSupport && !stdenv.hostPlatform.isDarwin) [
       "--with-ca-bundle=/etc/ssl/certs/ca-certificates.crt"
-    ] ++ lib.optionals (gnutlsSupport && !stdenv.isDarwin) [
+    ] ++ lib.optionals (gnutlsSupport && !stdenv.hostPlatform.isDarwin) [
       "--with-ca-path=/etc/ssl/certs"
     ];
 
@@ -174,7 +174,7 @@ stdenv.mkDerivation (finalAttrs: {
   doCheck = false;
   preCheck = ''
     patchShebangs tests/
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # bad interaction with sandbox if enabled?
     rm tests/data/test1453
     rm tests/data/test1086
@@ -215,7 +215,7 @@ stdenv.mkDerivation (finalAttrs: {
       pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
     } // lib.optionalAttrs (stdenv.hostPlatform.system != "x86_64-darwin") {
       static = pkgsStatic.curl;
-    } // lib.optionalAttrs (!stdenv.isDarwin) {
+    } // lib.optionalAttrs (!stdenv.hostPlatform.isDarwin) {
       fetchpatch = tests.fetchpatch.simple.override { fetchpatch = (fetchpatch.override { fetchurl = useThisCurl fetchurl; }) // { version = 1; }; };
     };
   };
diff --git a/pkgs/tools/networking/davix/default.nix b/pkgs/tools/networking/davix/default.nix
index d3ae2cd02c27..209b4e9d7a15 100644
--- a/pkgs/tools/networking/davix/default.nix
+++ b/pkgs/tools/networking/davix/default.nix
@@ -35,8 +35,8 @@ stdenv.mkDerivation rec {
     boost
     curl
   ]
-  ++ lib.optional stdenv.isDarwin Security
-  ++ lib.optional (!stdenv.isDarwin) libuuid
+  ++ lib.optional stdenv.hostPlatform.isDarwin Security
+  ++ lib.optional (!stdenv.hostPlatform.isDarwin) libuuid
   ++ lib.optional (enableThirdPartyCopy) gsoap;
 
   # using the url below since the github release page states
diff --git a/pkgs/tools/networking/dcap/default.nix b/pkgs/tools/networking/dcap/default.nix
index 4045748fc447..de3a484f5dee 100644
--- a/pkgs/tools/networking/dcap/default.nix
+++ b/pkgs/tools/networking/dcap/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "dev" "out" "man" "doc" ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "dCache access protocol client library";
     homepage = "https://github.com/dCache/dcap";
     changelog = "https://github.com/dCache/dcap/blob/master/ChangeLog";
diff --git a/pkgs/tools/networking/dd-agent/datadog-agent.nix b/pkgs/tools/networking/dd-agent/datadog-agent.nix
index 0b1d157af5d3..1fc91bf1f05a 100644
--- a/pkgs/tools/networking/dd-agent/datadog-agent.nix
+++ b/pkgs/tools/networking/dd-agent/datadog-agent.nix
@@ -120,6 +120,6 @@ in buildGo121Module rec {
     license     = licenses.bsd3;
     maintainers = with maintainers; [ thoughtpolice domenkozar ];
     # never built on aarch64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/tools/networking/dhcpcd/default.nix b/pkgs/tools/networking/dhcpcd/default.nix
index 6221034dc285..d07cc72bed7e 100644
--- a/pkgs/tools/networking/dhcpcd/default.nix
+++ b/pkgs/tools/networking/dhcpcd/default.nix
@@ -24,9 +24,9 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [
     runtimeShellPackage # So patchShebangs finds a bash suitable for the installed scripts
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     udev
-  ] ++ lib.optionals stdenv.isFreeBSD [
+  ] ++ lib.optionals stdenv.hostPlatform.isFreeBSD [
     freebsd.libcapsicum
     freebsd.libcasper
   ];
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
   installFlags = [ "DBDIR=$(TMPDIR)/db" "SYSCONFDIR=${placeholder "out"}/etc" ];
 
   # Check that the udev plugin got built.
-  postInstall = lib.optionalString (udev != null && stdenv.isLinux) "[ -e ${placeholder "out"}/lib/dhcpcd/dev/udev.so ]";
+  postInstall = lib.optionalString (udev != null && stdenv.hostPlatform.isLinux) "[ -e ${placeholder "out"}/lib/dhcpcd/dev/udev.so ]";
 
   passthru = {
     inherit enablePrivSep;
diff --git a/pkgs/tools/networking/dnsmasq/default.nix b/pkgs/tools/networking/dnsmasq/default.nix
index 5c6d90b00a98..99744769fff6 100644
--- a/pkgs/tools/networking/dnsmasq/default.nix
+++ b/pkgs/tools/networking/dnsmasq/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl, pkg-config, nettle
 , libidn, libnetfilter_conntrack, nftables, buildPackages
-, dbusSupport ? stdenv.isLinux
+, dbusSupport ? stdenv.hostPlatform.isLinux
 , dbus
 , nixosTests
 }:
@@ -11,7 +11,7 @@ let
     "-DHAVE_DNSSEC"
   ] ++ lib.optionals dbusSupport [
     "-DHAVE_DBUS"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "-DHAVE_CONNTRACK"
     "-DHAVE_NFTSET"
   ]);
@@ -43,7 +43,7 @@ stdenv.mkDerivation rec {
 
   hardeningEnable = [ "pie" ];
 
-  postBuild = lib.optionalString stdenv.isLinux ''
+  postBuild = lib.optionalString stdenv.hostPlatform.isLinux ''
     make -C contrib/lease-tools
   '';
 
@@ -51,12 +51,12 @@ stdenv.mkDerivation rec {
   # module can create it in Nix-land?
   postInstall = ''
     install -Dm644 trust-anchors.conf $out/share/dnsmasq/trust-anchors.conf
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     install -Dm644 contrib/MacOSX-launchd/uk.org.thekelleys.dnsmasq.plist \
       $out/Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
     substituteInPlace $out/Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist \
       --replace "/usr/local/sbin" "$out/bin"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     install -Dm755 contrib/lease-tools/dhcp_lease_time $out/bin/dhcp_lease_time
     install -Dm755 contrib/lease-tools/dhcp_release $out/bin/dhcp_release
     install -Dm755 contrib/lease-tools/dhcp_release6 $out/bin/dhcp_release6
@@ -76,7 +76,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ nettle libidn ]
     ++ lib.optionals dbusSupport [ dbus ]
-    ++ lib.optionals stdenv.isLinux [ libnetfilter_conntrack nftables ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libnetfilter_conntrack nftables ];
 
   passthru.tests = {
     prometheus-exporter = nixosTests.prometheus-exporters.dnsmasq;
diff --git a/pkgs/tools/networking/dnsmonster/default.nix b/pkgs/tools/networking/dnsmonster/default.nix
index e4a5d097f04a..0b32a8c90869 100644
--- a/pkgs/tools/networking/dnsmonster/default.nix
+++ b/pkgs/tools/networking/dnsmonster/default.nix
@@ -34,7 +34,7 @@ buildGoModule rec {
     changelog = "https://github.com/mosajjal/dnsmonster/releases/tag/v${version}";
     license = licenses.gpl2Only;
     maintainers = with maintainers; [ fab ];
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     mainProgram = "dnsmonster";
   };
 }
diff --git a/pkgs/tools/networking/dnstracer/default.nix b/pkgs/tools/networking/dnstracer/default.nix
index 30017b2b7620..8d1134cff46f 100644
--- a/pkgs/tools/networking/dnstracer/default.nix
+++ b/pkgs/tools/networking/dnstracer/default.nix
@@ -20,9 +20,9 @@ stdenv.mkDerivation rec {
     install -Dm755 -t $man/share/man/man8 dnstracer.8
   '';
 
-  buildInputs = [] ++ lib.optionals stdenv.isDarwin [ libresolv ];
+  buildInputs = [] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libresolv ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-lresolv";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-lresolv";
 
   meta = with lib; {
     description = "Determines where a given Domain Name Server (DNS) gets its information from, and follows the chain of DNS servers back to the servers which know the data";
diff --git a/pkgs/tools/networking/dogdns/default.nix b/pkgs/tools/networking/dogdns/default.nix
index e368e10715e6..397e87f23a10 100644
--- a/pkgs/tools/networking/dogdns/default.nix
+++ b/pkgs/tools/networking/dogdns/default.nix
@@ -28,9 +28,9 @@ rustPlatform.buildRustPackage rec {
   ];
 
   nativeBuildInputs = [ installShellFiles just pandoc ]
-    ++ lib.optionals stdenv.isLinux [ pkg-config ];
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   outputs = [ "out" "man" ];
 
diff --git a/pkgs/tools/networking/drill/default.nix b/pkgs/tools/networking/drill/default.nix
index 005d24ac323f..3afaff496ad9 100644
--- a/pkgs/tools/networking/drill/default.nix
+++ b/pkgs/tools/networking/drill/default.nix
@@ -20,16 +20,16 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-96eUCg0mzgUFLOKxpwRfzj1jH2Z+aDohBTztvRVWln0=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
   OPENSSL_LIB_DIR = "${lib.getLib openssl}/lib";
   OPENSSL_DIR="${lib.getDev openssl}";
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/networking/edgedb/default.nix b/pkgs/tools/networking/edgedb/default.nix
index 58763cc39319..c5f360cd2505 100644
--- a/pkgs/tools/networking/edgedb/default.nix
+++ b/pkgs/tools/networking/edgedb/default.nix
@@ -52,7 +52,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs =
     [ curl ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       CoreServices
       Security
       libiconv
diff --git a/pkgs/tools/networking/fast-ssh/default.nix b/pkgs/tools/networking/fast-ssh/default.nix
index 59f61d9af710..e0b8d8775c10 100644
--- a/pkgs/tools/networking/fast-ssh/default.nix
+++ b/pkgs/tools/networking/fast-ssh/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-CJ3Xx5jaTD01Ai7YAY4vB7RB5lU1BIXq7530B6+KeX4=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "TUI tool to use the SSH config for connections";
diff --git a/pkgs/tools/networking/fastd/default.nix b/pkgs/tools/networking/fastd/default.nix
index 20f8adf71cf8..cafcf4bdaf50 100644
--- a/pkgs/tools/networking/fastd/default.nix
+++ b/pkgs/tools/networking/fastd/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     libsodium
     libuecc
     openssl
-  ] ++ lib.optionals (stdenv.isLinux) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isLinux) [
     libmnl
   ];
 
diff --git a/pkgs/tools/networking/findomain/default.nix b/pkgs/tools/networking/findomain/default.nix
index e04699ff7458..7fed4c99daae 100644
--- a/pkgs/tools/networking/findomain/default.nix
+++ b/pkgs/tools/networking/findomain/default.nix
@@ -36,7 +36,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
 
diff --git a/pkgs/tools/networking/ghostunnel/default.nix b/pkgs/tools/networking/ghostunnel/default.nix
index 2d23839a3b71..ade3fe16e45a 100644
--- a/pkgs/tools/networking/ghostunnel/default.nix
+++ b/pkgs/tools/networking/ghostunnel/default.nix
@@ -33,7 +33,7 @@ buildGoModule rec {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "TLS proxy with mutual authentication support for securing non-TLS backend applications";
     homepage = "https://github.com/ghostunnel/ghostunnel#readme";
     changelog = "https://github.com/ghostunnel/ghostunnel/releases/tag/v${version}";
diff --git a/pkgs/tools/networking/godspeed/default.nix b/pkgs/tools/networking/godspeed/default.nix
index 64441c1674dd..2d0e4e32dea2 100644
--- a/pkgs/tools/networking/godspeed/default.nix
+++ b/pkgs/tools/networking/godspeed/default.nix
@@ -27,7 +27,7 @@ buildGoModule rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Manager for reverse shells";
     homepage = "https://github.com/redcode-labs/GodSpeed";
     license = with licenses; [ mit ];
diff --git a/pkgs/tools/networking/gp-saml-gui/default.nix b/pkgs/tools/networking/gp-saml-gui/default.nix
index 105d5f6c68ba..f28306880f62 100644
--- a/pkgs/tools/networking/gp-saml-gui/default.nix
+++ b/pkgs/tools/networking/gp-saml-gui/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     sha256 = "sha256-4MFHad1cuCWawy2hrqdXOgud0pXpYiV9J3Jwqyg4Udk=";
   };
 
-  buildInputs = lib.optional stdenv.isLinux glib-networking;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux glib-networking;
 
   nativeBuildInputs = [ wrapGAppsHook3 gobject-introspection glib-networking ];
 
@@ -29,7 +29,7 @@ buildPythonPackage rec {
     requests
     pygobject3
     openconnect
-  ] ++ lib.optional stdenv.isLinux webkitgtk;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux webkitgtk;
 
   preFixup = ''
     gappsWrapperArgs+=(
diff --git a/pkgs/tools/networking/gping/default.nix b/pkgs/tools/networking/gping/default.nix
index fb8857afff72..5079ce509bb9 100644
--- a/pkgs/tools/networking/gping/default.nix
+++ b/pkgs/tools/networking/gping/default.nix
@@ -21,11 +21,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-pQ95sS2dGVzZUOyuUpJPamW7RLiUTGu9KgpWLg4wn/w=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   nativeBuildInputs = [ installShellFiles ];
 
-  nativeCheckInputs = lib.optionals stdenv.isLinux [ iputils ];
+  nativeCheckInputs = lib.optionals stdenv.hostPlatform.isLinux [ iputils ];
 
   postInstall = ''
     installManPage gping.1
diff --git a/pkgs/tools/networking/grpc_cli/default.nix b/pkgs/tools/networking/grpc_cli/default.nix
index 24e22436b20d..d7a01b92dc45 100644
--- a/pkgs/tools/networking/grpc_cli/default.nix
+++ b/pkgs/tools/networking/grpc_cli/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ curl numactl ];
   cmakeFlags = [ "-DgRPC_BUILD_TESTS=ON" ];
   makeFlags = [ "grpc_cli" ];
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isAarch64 "-Wno-error=format-security";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isAarch64 "-Wno-error=format-security";
   installPhase = ''
     runHook preInstall
 
diff --git a/pkgs/tools/networking/haproxy/default.nix b/pkgs/tools/networking/haproxy/default.nix
index f2dc5dfd6e02..90d5bc12cadb 100644
--- a/pkgs/tools/networking/haproxy/default.nix
+++ b/pkgs/tools/networking/haproxy/default.nix
@@ -42,9 +42,9 @@ in stdenv.mkDerivation (finalAttrs: {
   # TODO: make it work on bsd as well
   makeFlags = [
     "PREFIX=${placeholder "out"}"
-    ("TARGET=" + (if stdenv.isSunOS then "solaris"
-    else if stdenv.isLinux then "linux-glibc"
-    else if stdenv.isDarwin then "osx"
+    ("TARGET=" + (if stdenv.hostPlatform.isSunOS then "solaris"
+    else if stdenv.hostPlatform.isLinux then "linux-glibc"
+    else if stdenv.hostPlatform.isDarwin then "osx"
     else "generic"))
   ];
 
@@ -66,7 +66,7 @@ in stdenv.mkDerivation (finalAttrs: {
     "LUA_LIB_NAME=lua"
     "LUA_LIB=${lua5_4}/lib"
     "LUA_INC=${lua5_4}/include"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "USE_SYSTEMD=yes"
     "USE_GETADDRINFO=1"
   ] ++ lib.optionals withPrometheusExporter [
diff --git a/pkgs/tools/networking/hping/default.nix b/pkgs/tools/networking/hping/default.nix
index 528bf11e7d94..10bd63d48927 100644
--- a/pkgs/tools/networking/hping/default.nix
+++ b/pkgs/tools/networking/hping/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
   postPatch = ''
     substituteInPlace Makefile.in --replace "gcc" "$CC"
     substituteInPlace version.c --replace "RELEASE_DATE" "\"$version\""
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     sed -i -e 's|#include <net/bpf.h>|#include <pcap/bpf.h>|' \
       libpcap_stuff.c script.c
   '' + lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
diff --git a/pkgs/tools/networking/httplz/default.nix b/pkgs/tools/networking/httplz/default.nix
index e83570f62f04..cb0e51632784 100644
--- a/pkgs/tools/networking/httplz/default.nix
+++ b/pkgs/tools/networking/httplz/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
     ronn
   ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/networking/ifstat-legacy/default.nix b/pkgs/tools/networking/ifstat-legacy/default.nix
index 25c7dbb60ec4..f37f33a23f4b 100644
--- a/pkgs/tools/networking/ifstat-legacy/default.nix
+++ b/pkgs/tools/networking/ifstat-legacy/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "01zmv6vk5kh5xmd563xws8a1qnxjb6b6kv59yzz9r3rrghxhd6c5";
   };
 
-  buildInputs = lib.optional stdenv.isLinux net-snmp;
+  buildInputs = lib.optional stdenv.hostPlatform.isLinux net-snmp;
 
   nativeBuildInputs = [ autoreconfHook ];
 
diff --git a/pkgs/tools/networking/iftop/default.nix b/pkgs/tools/networking/iftop/default.nix
index c40a8ee51238..fdda3245b8b1 100644
--- a/pkgs/tools/networking/iftop/default.nix
+++ b/pkgs/tools/networking/iftop/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   # Explicitly link against libgcc_s, to work around the infamous
   # "libgcc_s.so.1 must be installed for pthread_cancel to work".
-  LDFLAGS = lib.optionalString stdenv.isLinux "-lgcc_s";
+  LDFLAGS = lib.optionalString stdenv.hostPlatform.isLinux "-lgcc_s";
 
   preConfigure = ''
     cp ${automake}/share/automake*/config.{sub,guess} config
diff --git a/pkgs/tools/networking/ifwifi/default.nix b/pkgs/tools/networking/ifwifi/default.nix
index e62266c2dc6b..645000dffc73 100644
--- a/pkgs/tools/networking/ifwifi/default.nix
+++ b/pkgs/tools/networking/ifwifi/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-TL7ZsRbpRdYymJHuoCUCqe/U3Vacb9mtKFh85IOl+PA=";
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     wrapProgram "$out/bin/ifwifi" \
@@ -22,8 +22,8 @@ rustPlatform.buildRustPackage rec {
         # `ifwifi` runtime dep
         [ networkmanager ]
         # `wifiscanner` crate's runtime deps
-        ++ (lib.optional stdenv.isLinux iw)
-        # ++ (lib.optional stdenv.isDarwin airport) # airport isn't packaged
+        ++ (lib.optional stdenv.hostPlatform.isLinux iw)
+        # ++ (lib.optional stdenv.hostPlatform.isDarwin airport) # airport isn't packaged
       )}"
   '';
 
diff --git a/pkgs/tools/networking/inetutils/default.nix b/pkgs/tools/networking/inetutils/default.nix
index 5bbe7e4f8d40..6aedb474c612 100644
--- a/pkgs/tools/networking/inetutils/default.nix
+++ b/pkgs/tools/networking/inetutils/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ help2man perl /* for `whois' */ ];
   buildInputs = [ ncurses /* for `talk' */ libxcrypt ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # This is a temporary workaround for missing headers in the 10.12 SDK to avoid a mass rebuild.
     # A commit to revert this change will be included in the fix PR targeting staging.
     NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     "--disable-rsh"
     "--disable-rlogin"
     "--disable-rexec"
-  ] ++ lib.optional stdenv.isDarwin  "--disable-servers";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin  "--disable-servers";
 
   doCheck = true;
 
diff --git a/pkgs/tools/networking/innernet/default.nix b/pkgs/tools/networking/innernet/default.nix
index 0e6480f58dbe..4627ef34367c 100644
--- a/pkgs/tools/networking/innernet/default.nix
+++ b/pkgs/tools/networking/innernet/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     libiconv
   ];
@@ -40,7 +40,7 @@ rustPlatform.buildRustPackage rec {
     installManPage doc/innernet.8.gz
     installShellCompletion doc/innernet.completions.{bash,fish,zsh}
     installShellCompletion doc/innernet-server.completions.{bash,fish,zsh}
-  '' + (lib.optionalString stdenv.isLinux ''
+  '' + (lib.optionalString stdenv.hostPlatform.isLinux ''
     find . -regex '.*\.\(target\|service\)' | xargs install -Dt $out/lib/systemd/system
     find $out/lib/systemd/system -type f | xargs sed -i "s|/usr/bin/innernet|$out/bin/innernet|"
   '');
diff --git a/pkgs/tools/networking/iperf/3.nix b/pkgs/tools/networking/iperf/3.nix
index 8952c4004fd3..a73184265f56 100644
--- a/pkgs/tools/networking/iperf/3.nix
+++ b/pkgs/tools/networking/iperf/3.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-hEBMqEMbWV6GxHPY8j2LsQKBAAHxX+r2EO/9OzGHiKo=";
   };
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isLinux [ lksctp-tools ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isLinux [ lksctp-tools ];
   configureFlags = [ "--with-openssl=${openssl.dev}" ];
 
   outputs = [
diff --git a/pkgs/tools/networking/isync/default.nix b/pkgs/tools/networking/isync/default.nix
index a3e035c30030..280be724a8aa 100644
--- a/pkgs/tools/networking/isync/default.nix
+++ b/pkgs/tools/networking/isync/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ pkg-config perl ]
     ++ lib.optionals withCyrusSaslXoauth2 [ makeWrapper ];
   buildInputs = [ openssl db cyrus_sasl zlib ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = lib.optionalString withCyrusSaslXoauth2 ''
     wrapProgram "$out/bin/mbsync" \
diff --git a/pkgs/tools/networking/jwhois/default.nix b/pkgs/tools/networking/jwhois/default.nix
index b384043cc23e..50959152d710 100644
--- a/pkgs/tools/networking/jwhois/default.nix
+++ b/pkgs/tools/networking/jwhois/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
   # Work around error from <stdio.h> on aarch64-darwin:
   #     error: 'TARGET_OS_IPHONE' is not defined, evaluates to 0 [-Werror,-Wundef-prefix=TARGET_OS_]
   # TODO: this should probably be fixed at a lower level than this?
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-undef-prefix";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-undef-prefix";
 
   meta = {
     description = "Client for the WHOIS protocol allowing you to query the owner of a domain name";
diff --git a/pkgs/tools/networking/lftp/default.nix b/pkgs/tools/networking/lftp/default.nix
index a3bf468f21e7..482347a5ab98 100644
--- a/pkgs/tools/networking/lftp/default.nix
+++ b/pkgs/tools/networking/lftp/default.nix
@@ -16,9 +16,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ openssl readline zlib libidn2 gmp libiconv libunistring gettext ];
 
-  hardeningDisable = lib.optional stdenv.isDarwin "format";
+  hardeningDisable = lib.optional stdenv.hostPlatform.isDarwin "format";
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     # Required to build with clang 16 or `configure` will fail to detect several standard functions.
     NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
   };
diff --git a/pkgs/tools/networking/libreswan/default.nix b/pkgs/tools/networking/libreswan/default.nix
index 7dac682407bd..c56cea33abf5 100644
--- a/pkgs/tools/networking/libreswan/default.nix
+++ b/pkgs/tools/networking/libreswan/default.nix
@@ -70,7 +70,7 @@ stdenv.mkDerivation rec {
     libcap_ng libxcrypt curl nspr nss ldns
     # needed to patch shebangs
     python3 bash
-  ] ++ lib.optional stdenv.isLinux libselinux;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux libselinux;
 
   prePatch = ''
     # Replace wget with curl to save a dependency
diff --git a/pkgs/tools/networking/lychee/default.nix b/pkgs/tools/networking/lychee/default.nix
index bc6f1d3a1f39..0ecd2a0033c9 100644
--- a/pkgs/tools/networking/lychee/default.nix
+++ b/pkgs/tools/networking/lychee/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   checkFlags = [
     #  Network errors for all of these tests
diff --git a/pkgs/tools/networking/magic-wormhole-rs/default.nix b/pkgs/tools/networking/magic-wormhole-rs/default.nix
index fc0ceebc714e..6cc7af7e1775 100644
--- a/pkgs/tools/networking/magic-wormhole-rs/default.nix
+++ b/pkgs/tools/networking/magic-wormhole-rs/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-x6aEas3vmdI24nOys+Y+vuwY7k5cYRAj9oOH73zyV+A=";
 
   buildInputs = [ libxcb ]
-    ++ lib.optionals stdenv.isDarwin [ Security AppKit ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security AppKit ];
 
   nativeBuildInputs = [ installShellFiles ];
 
diff --git a/pkgs/tools/networking/mailutils/default.nix b/pkgs/tools/networking/mailutils/default.nix
index 919b4dda863a..c9979a0fee5f 100644
--- a/pkgs/tools/networking/mailutils/default.nix
+++ b/pkgs/tools/networking/mailutils/default.nix
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
     readline
     sasl
     libxcrypt
-  ] ++ lib.optionals stdenv.isLinux [ nettools ]
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ nettools ]
   ++ lib.optionals pythonSupport [ python3 ]
   ++ lib.optionals guileSupport [ guile_2_2 ];
 
@@ -100,7 +100,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional (!guileSupport) "--without-guile";
 
   nativeCheckInputs = [ dejagnu mkpasswd ];
-  doCheck = !stdenv.isDarwin; # ERROR: All 46 tests were run, 46 failed unexpectedly.
+  doCheck = !stdenv.hostPlatform.isDarwin; # ERROR: All 46 tests were run, 46 failed unexpectedly.
   doInstallCheck = false; # fails
 
   preCheck = ''
diff --git a/pkgs/tools/networking/miniupnpc/default.nix b/pkgs/tools/networking/miniupnpc/default.nix
index 6942e682a813..378bab745166 100644
--- a/pkgs/tools/networking/miniupnpc/default.nix
+++ b/pkgs/tools/networking/miniupnpc/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
     (lib.cmakeBool "UPNPC_BUILD_STATIC" stdenv.hostPlatform.isStatic)
   ];
 
-  doCheck = !stdenv.isFreeBSD;
+  doCheck = !stdenv.hostPlatform.isFreeBSD;
 
   postInstall = ''
     mv $out/bin/upnpc-* $out/bin/upnpc
diff --git a/pkgs/tools/networking/mole/default.nix b/pkgs/tools/networking/mole/default.nix
index e5585be469fc..dca72a66b1f8 100644
--- a/pkgs/tools/networking/mole/default.nix
+++ b/pkgs/tools/networking/mole/default.nix
@@ -28,7 +28,7 @@ buildGoModule rec {
     homepage = "https://github.com/davrodpin/mole";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
-    broken = stdenv.isDarwin; # build fails with go > 1.17
+    broken = stdenv.hostPlatform.isDarwin; # build fails with go > 1.17
     mainProgram = "mole";
   };
 }
diff --git a/pkgs/tools/networking/mosh/default.nix b/pkgs/tools/networking/mosh/default.nix
index 908307a3b6a8..230122a2574b 100644
--- a/pkgs/tools/networking/mosh/default.nix
+++ b/pkgs/tools/networking/mosh/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, zlib, protobuf, ncurses, pkg-config
 , makeWrapper, perl, openssl, autoreconfHook, openssh, bash-completion, fetchpatch
-, withUtempter ? stdenv.isLinux && !stdenv.hostPlatform.isMusl, libutempter }:
+, withUtempter ? stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isMusl, libutempter }:
 
 stdenv.mkDerivation rec {
   pname = "mosh";
diff --git a/pkgs/tools/networking/mozwire/default.nix b/pkgs/tools/networking/mozwire/default.nix
index 40c6d3ec7827..800ea3c48f14 100644
--- a/pkgs/tools/networking/mozwire/default.nix
+++ b/pkgs/tools/networking/mozwire/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-2i8C1XgfI3MXnwXZzY6n8tIcw45G9h3vZqRlFaVoLH0=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
     Security
   ];
diff --git a/pkgs/tools/networking/mtr/default.nix b/pkgs/tools/networking/mtr/default.nix
index d36dcef4f080..42b79f978fdf 100644
--- a/pkgs/tools/networking/mtr/default.nix
+++ b/pkgs/tools/networking/mtr/default.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ ncurses jansson ]
     ++ lib.optional withGtk gtk3
-    ++ lib.optional stdenv.isLinux libcap;
+    ++ lib.optional stdenv.hostPlatform.isLinux libcap;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/tools/networking/narrowlink/default.nix b/pkgs/tools/networking/narrowlink/default.nix
index 62d9bd369ee7..531b0e7f60c9 100644
--- a/pkgs/tools/networking/narrowlink/default.nix
+++ b/pkgs/tools/networking/narrowlink/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
     rustPlatform.bindgenHook
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.IOKit
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/tools/networking/nbd/default.nix b/pkgs/tools/networking/nbd/default.nix
index 68bcc6265558..e2924665bd31 100644
--- a/pkgs/tools/networking/nbd/default.nix
+++ b/pkgs/tools/networking/nbd/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     glib
     gnutls
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     libnl
     linuxHeaders
   ];
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
   # ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=implicit-function-declaration";
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   passthru.tests = {
     test = nixosTests.nbd;
diff --git a/pkgs/tools/networking/ncftp/default.nix b/pkgs/tools/networking/ncftp/default.nix
index c31e6333b684..883d2e48afe3 100644
--- a/pkgs/tools/networking/ncftp/default.nix
+++ b/pkgs/tools/networking/ncftp/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   #     gpshare.o:(.bss+0x0): first defined here
   env.NIX_CFLAGS_COMPILE = toString ([ "-fcommon" ]
     # these are required for the configure script to work with clang
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "-Wno-implicit-int"
       "-Wno-implicit-function-declaration"
     ]);
diff --git a/pkgs/tools/networking/ndjbdns/default.nix b/pkgs/tools/networking/ndjbdns/default.nix
index e5a3837657b1..5619c5b5c37b 100644
--- a/pkgs/tools/networking/ndjbdns/default.nix
+++ b/pkgs/tools/networking/ndjbdns/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ ]
-    ++ lib.optional stdenv.isLinux systemd;
+    ++ lib.optional stdenv.hostPlatform.isLinux systemd;
 
   meta = with lib; {
     description = "Brand new release of the Djbdns";
diff --git a/pkgs/tools/networking/netbird/default.nix b/pkgs/tools/networking/netbird/default.nix
index 18e16956724d..cffab15b4993 100644
--- a/pkgs/tools/networking/netbird/default.nix
+++ b/pkgs/tools/networking/netbird/default.nix
@@ -44,13 +44,13 @@ buildGoModule rec {
 
   nativeBuildInputs = [ installShellFiles ] ++ lib.optional ui pkg-config;
 
-  buildInputs = lib.optionals (stdenv.isLinux && ui) [
+  buildInputs = lib.optionals (stdenv.hostPlatform.isLinux && ui) [
     gtk3
     libayatana-appindicator
     libX11
     libXcursor
     libXxf86vm
-  ] ++ lib.optionals (stdenv.isDarwin && ui) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && ui) [
     Cocoa
     IOKit
     Kernel
@@ -88,7 +88,7 @@ buildGoModule rec {
           --fish <($out/bin/${binary} completion fish) \
           --zsh <($out/bin/${binary} completion zsh)
       '')
-      modules) + lib.optionalString (stdenv.isLinux && ui) ''
+      modules) + lib.optionalString (stdenv.hostPlatform.isLinux && ui) ''
     mkdir -p $out/share/pixmaps
     cp $src/client/ui/netbird-systemtray-connected.png $out/share/pixmaps/netbird.png
 
diff --git a/pkgs/tools/networking/netcat-openbsd/default.nix b/pkgs/tools/networking/netcat-openbsd/default.nix
index 3f561716ede6..ec82ec16915f 100644
--- a/pkgs/tools/networking/netcat-openbsd/default.nix
+++ b/pkgs/tools/networking/netcat-openbsd/default.nix
@@ -45,6 +45,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     mainProgram = "nc";
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/networking/notemap/default.nix b/pkgs/tools/networking/notemap/default.nix
index 726b24469ab5..0611665d6618 100644
--- a/pkgs/tools/networking/notemap/default.nix
+++ b/pkgs/tools/networking/notemap/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     libressl
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     memstreamHook
   ];
 
diff --git a/pkgs/tools/networking/ntp/default.nix b/pkgs/tools/networking/ntp/default.nix
index 1ba389e38c02..2321455b8bbb 100644
--- a/pkgs/tools/networking/ntp/default.nix
+++ b/pkgs/tools/networking/ntp/default.nix
@@ -16,10 +16,10 @@ stdenv.mkDerivation rec {
     "--with-openssl-incdir=${openssl.dev}/include"
     "--enable-ignore-dns-errors"
     "--with-yielding-select=yes"
-  ] ++ lib.optional stdenv.isLinux "--enable-linuxcaps";
+  ] ++ lib.optional stdenv.hostPlatform.isLinux "--enable-linuxcaps";
 
   buildInputs = [ openssl perl ]
-    ++ lib.optionals stdenv.isLinux [ pps-tools libcap ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pps-tools libcap ];
 
   hardeningEnable = [ "pie" ];
 
diff --git a/pkgs/tools/networking/ockam/default.nix b/pkgs/tools/networking/ockam/default.nix
index a6d8affd4dc5..aa983c12a411 100644
--- a/pkgs/tools/networking/ockam/default.nix
+++ b/pkgs/tools/networking/ockam/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage {
   cargoHash = "sha256-yOSCkOIprQoAGxPi1jsHPmQ9bVaudSNw13jL4jTNehY=";
   nativeBuildInputs = [ git pkg-config ];
   buildInputs = [ openssl dbus ]
-    ++ lib.optionals stdenv.isDarwin [ AppKit Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ AppKit Security ];
 
   passthru.updateScript = nix-update-script { };
 
diff --git a/pkgs/tools/networking/oha/default.nix b/pkgs/tools/networking/oha/default.nix
index 71bc43135455..efd8fe7534ac 100644
--- a/pkgs/tools/networking/oha/default.nix
+++ b/pkgs/tools/networking/oha/default.nix
@@ -20,13 +20,13 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-ks7n/x3RhjQbITL2hxiFkjxpZ5tcYMUyyfR/T7Kq/uU=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/networking/onetun/default.nix b/pkgs/tools/networking/onetun/default.nix
index 4bc18cee4662..61f2ce7f3f45 100644
--- a/pkgs/tools/networking/onetun/default.nix
+++ b/pkgs/tools/networking/onetun/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-TRfr4riMzR/MbsV2RiQNlPoPLhHK5EScNBCeyyamfgE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/networking/openconnect/common.nix b/pkgs/tools/networking/openconnect/common.nix
index 0dccb0e92fff..82040f64a897 100644
--- a/pkgs/tools/networking/openconnect/common.nix
+++ b/pkgs/tools/networking/openconnect/common.nix
@@ -16,7 +16,7 @@
 , pcsclite
 , vpnc-scripts
 , PCSC
-, useDefaultExternalBrowser ? stdenv.isLinux && stdenv.buildPlatform == stdenv.hostPlatform # xdg-utils doesn't cross-compile
+, useDefaultExternalBrowser ? stdenv.hostPlatform.isLinux && stdenv.buildPlatform == stdenv.hostPlatform # xdg-utils doesn't cross-compile
 , xdg-utils
 , autoreconfHook
 }:
@@ -34,8 +34,8 @@ stdenv.mkDerivation {
   ];
 
   buildInputs = [ gmp libxml2 stoken zlib (if useOpenSSL then openssl else gnutls) ]
-    ++ lib.optional stdenv.isDarwin PCSC
-    ++ lib.optionals stdenv.isLinux [ p11-kit pcsclite ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin PCSC
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ p11-kit pcsclite ]
     ++ lib.optional useDefaultExternalBrowser xdg-utils;
   nativeBuildInputs = [ pkg-config autoreconfHook ];
 
diff --git a/pkgs/tools/networking/openfortivpn/default.nix b/pkgs/tools/networking/openfortivpn/default.nix
index 91ec26c96a61..5d416e01601f 100644
--- a/pkgs/tools/networking/openfortivpn/default.nix
+++ b/pkgs/tools/networking/openfortivpn/default.nix
@@ -7,7 +7,7 @@
 , ppp
 , systemd
 , withSystemd ? lib.meta.availableOn stdenv.hostPlatform systemd
-, withPpp ? stdenv.isLinux
+, withPpp ? stdenv.hostPlatform.isLinux
 }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/networking/openssh/common.nix b/pkgs/tools/networking/openssh/common.nix
index 496ea270c81e..c1cf38dfa87e 100644
--- a/pkgs/tools/networking/openssh/common.nix
+++ b/pkgs/tools/networking/openssh/common.nix
@@ -98,7 +98,7 @@ stdenv.mkDerivation (finalAttrs: {
   ] ++ lib.optional (etcDir != null) "--sysconfdir=${etcDir}"
     ++ lib.optional withFIDO "--with-security-key-builtin=yes"
     ++ lib.optional withKerberos (assert krb5 != null; "--with-kerberos5=${lib.getDev krb5}")
-    ++ lib.optional stdenv.isDarwin "--disable-libutil"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-libutil"
     ++ lib.optional (!linkOpenssl) "--without-openssl"
     ++ lib.optional withLdns "--with-ldns"
     ++ extraConfigureFlags;
@@ -113,7 +113,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   doCheck = false;
   enableParallelChecking = false;
-  nativeCheckInputs = [ openssl ] ++ lib.optional (!stdenv.isDarwin) hostname;
+  nativeCheckInputs = [ openssl ] ++ lib.optional (!stdenv.hostPlatform.isDarwin) hostname;
   preCheck = lib.optionalString (stdenv.hostPlatform == stdenv.buildPlatform) ''
     # construct a dummy HOME
     export HOME=$(realpath ../dummy-home)
@@ -161,7 +161,7 @@ stdenv.mkDerivation (finalAttrs: {
   # integration tests hard to get working on darwin with its shaky
   # sandbox
   # t-exec tests fail on musl
-  checkTarget = lib.optional (!stdenv.isDarwin && !stdenv.hostPlatform.isMusl) "t-exec"
+  checkTarget = lib.optional (!stdenv.hostPlatform.isDarwin && !stdenv.hostPlatform.isMusl) "t-exec"
     # other tests are less demanding of the environment
     ++ [ "unit" "file-tests" "interop-tests" ];
 
diff --git a/pkgs/tools/networking/openvpn/default.nix b/pkgs/tools/networking/openvpn/default.nix
index d4035df7ce7a..c7fa7a222f83 100644
--- a/pkgs/tools/networking/openvpn/default.nix
+++ b/pkgs/tools/networking/openvpn/default.nix
@@ -31,13 +31,13 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ lz4 lzo openssl ]
-    ++ optionals stdenv.isLinux [ libcap_ng libnl pam ]
+    ++ optionals stdenv.hostPlatform.isLinux [ libcap_ng libnl pam ]
     ++ optional useSystemd systemd
     ++ optional pkcs11Support pkcs11helper;
 
   configureFlags = optional useSystemd "--enable-systemd"
     ++ optional pkcs11Support "--enable-pkcs11"
-    ++ optional stdenv.isDarwin "--disable-plugin-auth-pam";
+    ++ optional stdenv.hostPlatform.isDarwin "--disable-plugin-auth-pam";
 
   # We used to vendor the update-systemd-resolved script inside libexec,
   # but a separate package was made, that uses libexec/openvpn. Copy it
diff --git a/pkgs/tools/networking/p2p/amule/default.nix b/pkgs/tools/networking/p2p/amule/default.nix
index d5446fedb550..608ce21c9997 100644
--- a/pkgs/tools/networking/p2p/amule/default.nix
+++ b/pkgs/tools/networking/p2p/amule/default.nix
@@ -98,6 +98,6 @@ stdenv.mkDerivation rec {
     maintainers = [ ];
     platforms = platforms.unix;
     # Undefined symbols for architecture arm64: "_FSFindFolder"
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/networking/pdnsd/default.nix b/pkgs/tools/networking/pdnsd/default.nix
index 26001c37e982..4a09295b79bf 100644
--- a/pkgs/tools/networking/pdnsd/default.nix
+++ b/pkgs/tools/networking/pdnsd/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   patches =
     # fix build with linux headers >= 5.13
-    lib.optional stdenv.isLinux
+    lib.optional stdenv.hostPlatform.isLinux
       (fetchpatch {
         name = "fix-build-linux-headers-gte-5.13.patch";
         url = "https://gitweb.gentoo.org/repo/gentoo.git/plain/net-dns/pdnsd/files/pdnsd-1.2.9a-linux-5.13_build_fix.patch?id=7ce35657f269c3b7016e8940ad36e59cf06e12a4";
diff --git a/pkgs/tools/networking/phantomsocks/default.nix b/pkgs/tools/networking/phantomsocks/default.nix
index bb8aad8740df..1a720efb9381 100644
--- a/pkgs/tools/networking/phantomsocks/default.nix
+++ b/pkgs/tools/networking/phantomsocks/default.nix
@@ -4,8 +4,8 @@
 , stdenv
 , libpcap
   # Cann't be build with both pcap and rawsocket tags
-, withPcap ? (!stdenv.isLinux && !withRawsocket)
-, withRawsocket ? (stdenv.isLinux && !withPcap)
+, withPcap ? (!stdenv.hostPlatform.isLinux && !withRawsocket)
+, withRawsocket ? (stdenv.hostPlatform.isLinux && !withPcap)
 }:
 
 buildGoModule rec {
diff --git a/pkgs/tools/networking/phodav/default.nix b/pkgs/tools/networking/phodav/default.nix
index f4bb16493901..ac84016c4abc 100644
--- a/pkgs/tools/networking/phodav/default.nix
+++ b/pkgs/tools/networking/phodav/default.nix
@@ -38,7 +38,7 @@ stdenv.mkDerivation rec {
     "-Dudevrulesdir=${placeholder "out"}/lib/udev/rules.d"
   ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-lintl";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-lintl";
 
   passthru = {
     updateScript = gnome.updateScript {
diff --git a/pkgs/tools/networking/pritunl-client/default.nix b/pkgs/tools/networking/pritunl-client/default.nix
index 697cc08ec4f6..535919563158 100644
--- a/pkgs/tools/networking/pritunl-client/default.nix
+++ b/pkgs/tools/networking/pritunl-client/default.nix
@@ -48,7 +48,7 @@
     postPatch = ''
       sed -Ei service/profile/scripts.go \
         -e 's|#!\s*(/usr)?/bin/(env )?bash\b|#! ${runtimeShell}|g'
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       sed -Ei service/profile/scripts.go \
         -e 's|(/usr)?/s?bin/busctl\b|busctl|g' \
         -e 's|(/usr)?/s?bin/resolvectl\b|resolvectl|g' \
@@ -57,7 +57,7 @@
 
     postInstall = ''
       mv $out/bin/service $out/bin/pritunl-client-service
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       mkdir -p $out/lib/systemd/system/
       cp $src/resources_linux/pritunl-client.service $out/lib/systemd/system/
       substituteInPlace $out/lib/systemd/system/pritunl-client.service \
@@ -70,7 +70,7 @@
         which
         gnused
         gnugrep
-      ] ++ lib.optionals stdenv.isLinux [
+      ] ++ lib.optionals stdenv.hostPlatform.isLinux [
         openresolv
         systemd
         iproute2
@@ -83,7 +83,7 @@
           --prefix PATH : ${lib.makeBinPath hookScriptsDeps} \
           --add-flags "--setenv PATH \$PATH"
       '';
-    in lib.optionalString stdenv.isLinux ''
+    in lib.optionalString stdenv.hostPlatform.isLinux ''
       wrapProgram $out/bin/pritunl-client-service \
         --prefix PATH : "${lib.makeBinPath ([ openvpn-wrapped ])}"
     '';
@@ -113,7 +113,7 @@ in stdenv.mkDerivation {
     makeWrapper ${electron}/bin/electron $out/bin/pritunl-client-electron \
       --add-flags $out/lib/pritunl_client_electron
 
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/lib/systemd/system/
     ln -s ${service}/lib/systemd/system/pritunl-client.service $out/lib/systemd/system/
 
diff --git a/pkgs/tools/networking/quicktun/default.nix b/pkgs/tools/networking/quicktun/default.nix
index 2c28e3665698..2dcb9b21b623 100644
--- a/pkgs/tools/networking/quicktun/default.nix
+++ b/pkgs/tools/networking/quicktun/default.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation {
   passthru.tests.quicktun = nixosTests.quicktun;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Very simple, yet secure VPN software";
     homepage = "http://wiki.ucis.nl/QuickTun";
     maintainers = with maintainers; [ h7x4 ];
diff --git a/pkgs/tools/networking/restish/default.nix b/pkgs/tools/networking/restish/default.nix
index f8a1cfd466ea..a1fd639b72c1 100644
--- a/pkgs/tools/networking/restish/default.nix
+++ b/pkgs/tools/networking/restish/default.nix
@@ -21,10 +21,10 @@ buildGoModule rec {
 
   vendorHash = "sha256-qeArar0WnMACUnKBlC+PcFeJPzofwbK440A4M/rQ04U=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Cocoa
     darwin.apple_sdk.frameworks.Kernel
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     xorg.libX11
     xorg.libXcursor
     xorg.libXi
diff --git a/pkgs/tools/networking/rewrk/default.nix b/pkgs/tools/networking/rewrk/default.nix
index a76d66611773..c4f4755f4b5b 100644
--- a/pkgs/tools/networking/rewrk/default.nix
+++ b/pkgs/tools/networking/rewrk/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
     ln -s ${./Cargo.lock} Cargo.lock
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/networking/rustcat/default.nix b/pkgs/tools/networking/rustcat/default.nix
index 9848dbdd17b1..dba12bf58ac4 100644
--- a/pkgs/tools/networking/rustcat/default.nix
+++ b/pkgs/tools/networking/rustcat/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-wqoU9UfXDmf7KIHgFif5rZfZY8Zu0SsaMVfwTtXLzHg=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Port listener and reverse shell";
diff --git a/pkgs/tools/networking/s3rs/default.nix b/pkgs/tools/networking/s3rs/default.nix
index ec4725e9f2d0..ad343c00ca60 100644
--- a/pkgs/tools/networking/s3rs/default.nix
+++ b/pkgs/tools/networking/s3rs/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ python3 perl pkg-config ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "S3 cli client with multi configs with diffent provider";
diff --git a/pkgs/tools/networking/shadowsocks-rust/default.nix b/pkgs/tools/networking/shadowsocks-rust/default.nix
index 01b42fc57b97..18c7ca632d0b 100644
--- a/pkgs/tools/networking/shadowsocks-rust/default.nix
+++ b/pkgs/tools/networking/shadowsocks-rust/default.nix
@@ -13,10 +13,10 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-2uYLrYFuzvaOZxw2hN4DcrEbwW5rnXxqKoI2q6yZaGU=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
-  buildInputs = lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security CoreServices ];
 
   buildFeatures = [
     "trust-dns"
diff --git a/pkgs/tools/networking/siege/default.nix b/pkgs/tools/networking/siege/default.nix
index 6a1ce2f4a028..b26b21146175 100644
--- a/pkgs/tools/networking/siege/default.nix
+++ b/pkgs/tools/networking/siege/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-MJ1Ym/yBm28V0uXoWRs8DG9pNiT1Bg7qwGek2ad1fek=";
   };
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isLinux [
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isLinux [
     "-lgcc_s"
   ];
 
diff --git a/pkgs/tools/networking/slowlorust/default.nix b/pkgs/tools/networking/slowlorust/default.nix
index c48257130b2d..d5e924d10272 100644
--- a/pkgs/tools/networking/slowlorust/default.nix
+++ b/pkgs/tools/networking/slowlorust/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Wu1mm+yJw2SddddxC5NfnMWLr+dplnRxH3AJ1/mTAKM=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     Security
   ];
 
diff --git a/pkgs/tools/networking/sockperf/default.nix b/pkgs/tools/networking/sockperf/default.nix
index ed071322f2f8..6181138a7b6d 100644
--- a/pkgs/tools/networking/sockperf/default.nix
+++ b/pkgs/tools/networking/sockperf/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Network Benchmarking Utility";
     homepage = "https://github.com/Mellanox/sockperf";
     license = licenses.bsd3;
diff --git a/pkgs/tools/networking/speedtest-rs/default.nix b/pkgs/tools/networking/speedtest-rs/default.nix
index b70aaa95aa5b..322d735e645a 100644
--- a/pkgs/tools/networking/speedtest-rs/default.nix
+++ b/pkgs/tools/networking/speedtest-rs/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   buildInputs = [ openssl ] ++
-    lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.Security
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-0YPCBzidE1+LgIYk457eSoerLvQuuZs9cTd7uUt1Lr8=";
 
   # Fail for unclear reasons (only on darwin)
-  checkFlags = lib.optionals stdenv.isDarwin [
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "--skip=speedtest::tests::test_get_configuration"
     "--skip=speedtest::tests::test_get_server_list_with_config"
   ];
diff --git a/pkgs/tools/networking/srelay/default.nix b/pkgs/tools/networking/srelay/default.nix
index a8d6a33ac3d1..d54d4d79017a 100644
--- a/pkgs/tools/networking/srelay/default.nix
+++ b/pkgs/tools/networking/srelay/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     platforms = lib.platforms.unix;
     license = lib.licenses.bsd3;
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
     mainProgram = "srelay";
   };
 }
diff --git a/pkgs/tools/networking/strongswan/default.nix b/pkgs/tools/networking/strongswan/default.nix
index 8aaebd710e10..9972af91f1f9 100644
--- a/pkgs/tools/networking/strongswan/default.nix
+++ b/pkgs/tools/networking/strongswan/default.nix
@@ -31,8 +31,8 @@ stdenv.mkDerivation rec {
   buildInputs =
     [ curl gmp python3 ldns unbound openssl pcsclite ]
     ++ lib.optionals enableTNC [ trousers sqlite libxml2 ]
-    ++ lib.optionals stdenv.isLinux [ systemd.dev pam iptables ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ SystemConfiguration ])
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ systemd.dev pam iptables ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ SystemConfiguration ])
     ++ lib.optionals enableNetworkManager [ networkmanager glib ];
 
   patches = [
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
     ./updown-path.patch
   ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     # glibc-2.26 reorganized internal includes
     sed '1i#include <stdint.h>' -i src/libstrongswan/utils/utils/memory.h
 
@@ -60,14 +60,14 @@ stdenv.mkDerivation rec {
       "--enable-pkcs11" "--enable-eap-sim-pcsc" "--enable-dnscert" "--enable-unbound"
       "--enable-chapoly"
       "--enable-curl" ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       "--enable-farp" "--enable-dhcp"
       "--enable-systemd" "--with-systemdsystemunitdir=${placeholder "out"}/etc/systemd/system"
       "--enable-xauth-pam"
       "--enable-forecast"
       "--enable-connmark"
       "--enable-af-alg" ]
-    ++ lib.optionals stdenv.isx86_64 [ "--enable-aesni" "--enable-rdrand" ]
+    ++ lib.optionals stdenv.hostPlatform.isx86_64 [ "--enable-aesni" "--enable-rdrand" ]
     ++ lib.optional (stdenv.hostPlatform.system == "i686-linux") "--enable-padlock"
     ++ lib.optionals enableTNC [
          "--disable-gmp" "--disable-aes" "--disable-md5" "--disable-sha1" "--disable-sha2" "--disable-fips-prf"
@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
          "--enable-nm"
          "--with-nm-ca-dir=/etc/ssl/certs" ]
     # Taken from: https://wiki.strongswan.org/projects/strongswan/wiki/MacOSX
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       "--disable-systemd"
       "--disable-xauth-pam"
       "--disable-kernel-netlink"
diff --git a/pkgs/tools/networking/suckit/default.nix b/pkgs/tools/networking/suckit/default.nix
index c62ad29e0113..07c91a9081c2 100644
--- a/pkgs/tools/networking/suckit/default.nix
+++ b/pkgs/tools/networking/suckit/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optional stdenv.isDarwin Security;
+  buildInputs = [ openssl ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # requires internet access
   checkFlags = [
diff --git a/pkgs/tools/networking/termscp/default.nix b/pkgs/tools/networking/termscp/default.nix
index fdff493abd90..1d5fbf4c341c 100644
--- a/pkgs/tools/networking/termscp/default.nix
+++ b/pkgs/tools/networking/termscp/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
     dbus
     openssl
     samba
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Cocoa
     Foundation
@@ -43,7 +43,7 @@ rustPlatform.buildRustPackage rec {
   # Needed to get openssl-sys to use pkg-config.
   OPENSSL_NO_VENDOR = 1;
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-framework" "AppKit"
   ]);
 
diff --git a/pkgs/tools/networking/tgt/default.nix b/pkgs/tools/networking/tgt/default.nix
index a26daf42649d..647bc18e27b2 100644
--- a/pkgs/tools/networking/tgt/default.nix
+++ b/pkgs/tools/networking/tgt/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     "-Wno-error=maybe-uninitialized"
   ];
 
-  hardeningDisable = lib.optionals stdenv.isAarch64 [
+  hardeningDisable = lib.optionals stdenv.hostPlatform.isAarch64 [
     # error: 'read' writing 1 byte into a region of size 0 overflows the destination
     "fortify3"
   ];
diff --git a/pkgs/tools/networking/toxvpn/default.nix b/pkgs/tools/networking/toxvpn/default.nix
index 555960da3980..dc6ae0daa16e 100644
--- a/pkgs/tools/networking/toxvpn/default.nix
+++ b/pkgs/tools/networking/toxvpn/default.nix
@@ -22,11 +22,11 @@ stdenv.mkDerivation {
   };
 
   buildInputs = [ libtoxcore nlohmann_json libsodium zeromq ]
-    ++ lib.optionals stdenv.isLinux [ libcap systemd ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap systemd ];
 
   nativeBuildInputs = [ cmake ];
 
-  cmakeFlags = lib.optionals stdenv.isLinux [ "-DSYSTEMD=1" ];
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isLinux [ "-DSYSTEMD=1" ];
 
   postInstall = "$out/bin/toxvpn -h";
 
diff --git a/pkgs/tools/networking/transmission-rss/default.nix b/pkgs/tools/networking/transmission-rss/default.nix
index 3d6d80ef474e..859b8acb5b10 100644
--- a/pkgs/tools/networking/transmission-rss/default.nix
+++ b/pkgs/tools/networking/transmission-rss/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [pkg-config];
   buildInputs = [openssl]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
       Security
       SystemConfiguration
     ]);
diff --git a/pkgs/tools/networking/trurl/default.nix b/pkgs/tools/networking/trurl/default.nix
index a8dc34374a9e..1e4bd4404f9c 100644
--- a/pkgs/tools/networking/trurl/default.nix
+++ b/pkgs/tools/networking/trurl/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   outputs = [ "out" "dev" "man" ];
-  separateDebugInfo = stdenv.isLinux;
+  separateDebugInfo = stdenv.hostPlatform.isLinux;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/tools/networking/tuic/default.nix b/pkgs/tools/networking/tuic/default.nix
index fc1270e01ae8..a2a0bfc2f0ff 100644
--- a/pkgs/tools/networking/tuic/default.nix
+++ b/pkgs/tools/networking/tuic/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec{
     hash = "sha256-VoNr91vDqBlt9asT/dwCeYk13UNiDexNNiKwD5DSn8k=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [
     Security
   ]);
 
diff --git a/pkgs/tools/networking/tunnelto/default.nix b/pkgs/tools/networking/tunnelto/default.nix
index 450556808394..7f3129705950 100644
--- a/pkgs/tools/networking/tunnelto/default.nix
+++ b/pkgs/tools/networking/tunnelto/default.nix
@@ -25,10 +25,10 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Expose your local web server to the internet with a public URL";
diff --git a/pkgs/tools/networking/tuntox/default.nix b/pkgs/tools/networking/tuntox/default.nix
index e59a615e2627..07fa3e316092 100644
--- a/pkgs/tools/networking/tuntox/default.nix
+++ b/pkgs/tools/networking/tuntox/default.nix
@@ -45,10 +45,10 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
       substituteInPlace gitversion.h --replace '7d45afdf7d00a95a8c3687175e2b1669fa1f7745' '365d2e5cbc0e3655fb64c204db0515f5f4cdf5a4'
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       substituteInPlace Makefile --replace ' -static ' ' '
       substituteInPlace Makefile --replace 'CC=gcc' ' '
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       substituteInPlace Makefile.mac --replace '.git/HEAD .git/index' ' '
       substituteInPlace Makefile.mac --replace '/usr/local/lib/libtoxcore.a' '${libtoxcore}/lib/libtoxcore.a'
       substituteInPlace Makefile.mac --replace '/usr/local/lib/libsodium.a' '${libsodium}/lib/libsodium.dylib'
@@ -56,9 +56,9 @@ stdenv.mkDerivation rec {
     '';
 
   buildPhase = ''
-    '' + lib.optionalString stdenv.isLinux ''
+    '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       make
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       make -f Makefile.mac tuntox
     '';
 
diff --git a/pkgs/tools/networking/uwimap/default.nix b/pkgs/tools/networking/uwimap/default.nix
index a39f0d4660fb..a359e7677ac2 100644
--- a/pkgs/tools/networking/uwimap/default.nix
+++ b/pkgs/tools/networking/uwimap/default.nix
@@ -12,17 +12,17 @@ stdenv.mkDerivation rec {
   makeFlags = [
     "CC=${stdenv.cc.targetPrefix}cc"
     "RANLIB=${stdenv.cc.targetPrefix}ranlib"
-    (if stdenv.isDarwin
+    (if stdenv.hostPlatform.isDarwin
     then "osx"
     else "lnp") # Linux with PAM modules;
-  ] ++ lib.optional stdenv.isx86_64 "EXTRACFLAGS=-fPIC"; # -fPIC is required to compile php with imap on x86_64 systems
+  ] ++ lib.optional stdenv.hostPlatform.isx86_64 "EXTRACFLAGS=-fPIC"; # -fPIC is required to compile php with imap on x86_64 systems
 
 
   hardeningDisable = [ "format" ];
 
   buildInputs = [
     openssl
-    (if stdenv.isDarwin then libkrb5 else pam)  # Matches the make target.
+    (if stdenv.hostPlatform.isDarwin then libkrb5 else pam)  # Matches the make target.
   ];
 
   patches = [
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     makeFlagsArray+=("ARRC=${stdenv.cc.targetPrefix}ar rc")
   '';
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin
     "-I${openssl.dev}/include/openssl";
 
   installPhase = ''
diff --git a/pkgs/tools/networking/veilid/default.nix b/pkgs/tools/networking/veilid/default.nix
index c41f4b414af0..e06a03b8edce 100644
--- a/pkgs/tools/networking/veilid/default.nix
+++ b/pkgs/tools/networking/veilid/default.nix
@@ -39,7 +39,7 @@ rustPlatform.buildRustPackage rec {
     protobuf
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ AppKit Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ AppKit Security ];
 
   cargoBuildFlags = [
     "--workspace"
diff --git a/pkgs/tools/networking/vpn-slice/default.nix b/pkgs/tools/networking/vpn-slice/default.nix
index ce8b04c35fc7..6ca66d44e61d 100644
--- a/pkgs/tools/networking/vpn-slice/default.nix
+++ b/pkgs/tools/networking/vpn-slice/default.nix
@@ -20,10 +20,10 @@ buildPythonApplication rec {
     sha256 = "sha256-T6VULLNRLWO4OcAsuTmhty6H4EhinyxQSg0dfv2DUJs=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace vpn_slice/mac.py \
       --replace "'/sbin/route'" "'${unixtools.route}/bin/route'"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace vpn_slice/linux.py \
       --replace "'/sbin/ip'" "'${iproute2}/bin/ip'" \
       --replace "'/sbin/iptables'" "'${iptables}/bin/iptables'"
diff --git a/pkgs/tools/networking/vpnc-scripts/default.nix b/pkgs/tools/networking/vpnc-scripts/default.nix
index e0319ed4bf14..9a757c73cf55 100644
--- a/pkgs/tools/networking/vpnc-scripts/default.nix
+++ b/pkgs/tools/networking/vpnc-scripts/default.nix
@@ -31,13 +31,13 @@ stdenv.mkDerivation {
   preFixup = ''
     substituteInPlace $out/bin/vpnc-script \
       --replace "which" "type -P"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace $out/bin/vpnc-script \
       --replace "/sbin/resolvconf" "${openresolv}/bin/resolvconf" \
       --replace "/usr/bin/resolvectl" "${systemd}/bin/resolvectl"
   '' + ''
     wrapProgram $out/bin/vpnc-script \
-      --prefix PATH : "${lib.makeBinPath ([ nettools gawk coreutils gnugrep ] ++ lib.optionals stdenv.isLinux [ openresolv iproute2 ])}"
+      --prefix PATH : "${lib.makeBinPath ([ nettools gawk coreutils gnugrep ] ++ lib.optionals stdenv.hostPlatform.isLinux [ openresolv iproute2 ])}"
   '';
 
   meta = with lib; {
diff --git a/pkgs/tools/networking/wakeonlan/default.nix b/pkgs/tools/networking/wakeonlan/default.nix
index 4a9f0936f940..f3f222d5ad64 100644
--- a/pkgs/tools/networking/wakeonlan/default.nix
+++ b/pkgs/tools/networking/wakeonlan/default.nix
@@ -13,7 +13,7 @@ perlPackages.buildPerlPackage rec {
 
   outputs = [ "out" ];
 
-  nativeBuildInputs = [ installShellFiles ] ++ lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = [ installShellFiles ] ++ lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
   nativeCheckInputs = [ perlPackages.TestPerlCritic perlPackages.TestPod perlPackages.TestPodCoverage ];
   # Linting and formatting checks are of no interest for us.
@@ -24,7 +24,7 @@ perlPackages.buildPerlPackage rec {
   installPhase = ''
     install -Dt $out/bin wakeonlan
     installManPage blib/man1/wakeonlan.1
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/wakeonlan
   '';
 
diff --git a/pkgs/tools/networking/wg-netmanager/default.nix b/pkgs/tools/networking/wg-netmanager/default.nix
index b4a34ba22a48..a2c16fae073b 100644
--- a/pkgs/tools/networking/wg-netmanager/default.nix
+++ b/pkgs/tools/networking/wg-netmanager/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-cOxkWMFPVmi+/BQWIvExzX5LDyC7C8kaTf5dGwfXj+s=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # Test 01 tries to create a wireguard interface, which requires sudo.
   doCheck = true;
diff --git a/pkgs/tools/networking/wget/default.nix b/pkgs/tools/networking/wget/default.nix
index f2681f2a39fa..0bfdf8affc7b 100644
--- a/pkgs/tools/networking/wget/default.nix
+++ b/pkgs/tools/networking/wget/default.nix
@@ -31,11 +31,11 @@ stdenv.mkDerivation rec {
   buildInputs = [ libidn2 zlib pcre libuuid ]
     ++ lib.optional withOpenssl openssl
     ++ lib.optional withLibpsl libpsl
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices perlPackages.perl ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices perlPackages.perl ];
 
   configureFlags = [
     (lib.withFeatureAs withOpenssl "ssl" "openssl")
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # https://lists.gnu.org/archive/html/bug-wget/2021-01/msg00076.html
     "--without-included-regex"
   ];
@@ -50,7 +50,7 @@ stdenv.mkDerivation rec {
     do
       sed -i "$i" -e's/localhost/127.0.0.1/g'
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # depending on the underlying filesystem, some tests
     # creating exotic file names fail
     for f in tests/Test-ftp-iri.px \
@@ -67,7 +67,7 @@ stdenv.mkDerivation rec {
   checkInputs = [
     perlPackages.HTTPDaemon
     python3
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     perlPackages.IOSocketSSL
   ];
 
diff --git a/pkgs/tools/networking/wget2/default.nix b/pkgs/tools/networking/wget2/default.nix
index 85512aec06b9..7445b425f034 100644
--- a/pkgs/tools/networking/wget2/default.nix
+++ b/pkgs/tools/networking/wget2/default.nix
@@ -68,7 +68,7 @@ stdenv.mkDerivation rec {
     zstd
   ] ++ lib.optionals sslSupport [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreServices
   ];
 
diff --git a/pkgs/tools/networking/wireguard-tools/default.nix b/pkgs/tools/networking/wireguard-tools/default.nix
index ebac01f063cd..855f620b4406 100644
--- a/pkgs/tools/networking/wireguard-tools/default.nix
+++ b/pkgs/tools/networking/wireguard-tools/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   postFixup = ''
     substituteInPlace $out/lib/systemd/system/wg-quick@.service \
       --replace /usr/bin $out/bin
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in $out/bin/*; do
       # Which firewall and resolvconf implementations to use should be determined by the
       # environment, we provide the "default" ones as fallback.
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
         --prefix PATH : ${lib.makeBinPath [ procps iproute2 ]} \
         --suffix PATH : ${lib.makeBinPath [ iptables openresolv ]}
     done
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     for f in $out/bin/*; do
       wrapProgram $f \
         --prefix PATH : ${lib.makeBinPath [ wireguard-go ]}
diff --git a/pkgs/tools/networking/wireguard-vanity-address/default.nix b/pkgs/tools/networking/wireguard-vanity-address/default.nix
index cc7ebc557faf..969e9187db5b 100644
--- a/pkgs/tools/networking/wireguard-vanity-address/default.nix
+++ b/pkgs/tools/networking/wireguard-vanity-address/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-SjzcVIQ9HwhP6Y/uCwXGSdZgrYcUQ9kE/Bow8pyOKNo=";
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   cargoHash = "sha256-0bkyopkssqH0vfaWkFC3dV2o7Q3EuDEOM8JvRB9ekLU=";
 
diff --git a/pkgs/tools/networking/wrk2/default.nix b/pkgs/tools/networking/wrk2/default.nix
index 6d2988705129..9bc8401efa66 100644
--- a/pkgs/tools/networking/wrk2/default.nix
+++ b/pkgs/tools/networking/wrk2/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     platforms   = lib.platforms.linux;
     maintainers = with lib.maintainers; [ thoughtpolice ];
     # never built on aarch64-linux since first introduction in nixpkgs
-    broken = stdenv.isLinux && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64;
     mainProgram = "wrk2";
   };
 }
diff --git a/pkgs/tools/networking/xh/default.nix b/pkgs/tools/networking/xh/default.nix
index 5df8e7903b2b..2ab8be19c44f 100644
--- a/pkgs/tools/networking/xh/default.nix
+++ b/pkgs/tools/networking/xh/default.nix
@@ -27,7 +27,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ installShellFiles pkg-config ];
 
   buildInputs = lib.optionals withNativeTls
-    (if stdenv.isDarwin then [ darwin.apple_sdk.frameworks.SystemConfiguration ] else [ openssl ]);
+    (if stdenv.hostPlatform.isDarwin then [ darwin.apple_sdk.frameworks.SystemConfiguration ] else [ openssl ]);
 
   # Get openssl-sys to use pkg-config
   OPENSSL_NO_VENDOR = 1;
diff --git a/pkgs/tools/networking/xrootd/default.nix b/pkgs/tools/networking/xrootd/default.nix
index 1ceb6380aaa1..60da8d7e6e21 100644
--- a/pkgs/tools/networking/xrootd/default.nix
+++ b/pkgs/tools/networking/xrootd/default.nix
@@ -78,11 +78,11 @@ stdenv.mkDerivation (finalAttrs: {
     scitokens-cpp
     zlib
   ]
-  ++ lib.optionals (!stdenv.isDarwin) [
+  ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [
     # https://github.com/xrootd/xrootd/blob/5b5a1f6957def2816b77ec773c7e1bfb3f1cfc5b/cmake/XRootDFindLibs.cmake#L58
     fuse
   ]
-  ++ lib.optionals stdenv.isLinux [
+  ++ lib.optionals stdenv.hostPlatform.isLinux [
     systemd
     voms
   ]
@@ -95,7 +95,7 @@ stdenv.mkDerivation (finalAttrs: {
     patchShebangs genversion.sh
     substituteInPlace cmake/XRootDConfig.cmake.in \
       --replace-fail "@PACKAGE_CMAKE_INSTALL_" "@CMAKE_INSTALL_FULL_"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i cmake/XRootDOSDefs.cmake -e '/set( MacOSX TRUE )/ainclude( GNUInstallDirs )'
   '';
 
@@ -117,7 +117,7 @@ stdenv.mkDerivation (finalAttrs: {
   + ''
     moveToOutput "bin/xrootd-config" "$dev"
     moveToOutput "bin/.xrootd-config-wrapped" "$dev"
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p "$out/lib/systemd/system"
     install -m 644 -t "$out/lib/systemd/system" ../packaging/common/*.service ../packaging/common/*.socket
   '';
@@ -127,12 +127,12 @@ stdenv.mkDerivation (finalAttrs: {
   ] ++ lib.optionals enableTestRunner [
     "-DFORCE_ENABLED=TRUE"
     "-DENABLE_DAVIX=TRUE"
-    "-DENABLE_FUSE=${if (!stdenv.isDarwin) then "TRUE" else "FALSE"}" # not supported
+    "-DENABLE_FUSE=${if (!stdenv.hostPlatform.isDarwin) then "TRUE" else "FALSE"}" # not supported
     "-DENABLE_MACAROONS=OFF"
     "-DENABLE_PYTHON=FALSE" # built separately
     "-DENABLE_SCITOKENS=TRUE"
     "-DENABLE_TESTS=TRUE"
-    "-DENABLE_VOMS=${if stdenv.isLinux then "TRUE" else "FALSE"}"
+    "-DENABLE_VOMS=${if stdenv.hostPlatform.isLinux then "TRUE" else "FALSE"}"
   ];
 
   postFixup = lib.optionalString (externalEtc != null) ''
diff --git a/pkgs/tools/nix/fh/default.nix b/pkgs/tools/nix/fh/default.nix
index 7e99d3aa068a..bc02bac41d58 100644
--- a/pkgs/tools/nix/fh/default.nix
+++ b/pkgs/tools/nix/fh/default.nix
@@ -29,13 +29,13 @@ rustPlatform.buildRustPackage rec {
 
   checkInputs = [ cacert ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
     gcc.cc.lib
   ];
 
-  env = lib.optionalAttrs stdenv.isDarwin {
+  env = lib.optionalAttrs stdenv.hostPlatform.isDarwin {
     NIX_CFLAGS_COMPILE = "-I${lib.getDev libcxx}/include/c++/v1";
   };
 
diff --git a/pkgs/tools/nix/gridlock/default.nix b/pkgs/tools/nix/gridlock/default.nix
index e49750eba5ca..ddfa9ee9831f 100644
--- a/pkgs/tools/nix/gridlock/default.nix
+++ b/pkgs/tools/nix/gridlock/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/nix/info/default.nix b/pkgs/tools/nix/info/default.nix
index 73c336afe045..7b29f9c43c9a 100644
--- a/pkgs/tools/nix/info/default.nix
+++ b/pkgs/tools/nix/info/default.nix
@@ -9,8 +9,8 @@ stdenv.mkDerivation {
 
   path = lib.makeBinPath ([
     coreutils findutils gnugrep
-  ] ++ (lib.optionals stdenv.isDarwin [ darwin.DarwinTools ]));
-  is_darwin = if stdenv.isDarwin then "yes" else "no";
+  ] ++ (lib.optionals stdenv.hostPlatform.isDarwin [ darwin.DarwinTools ]));
+  is_darwin = if stdenv.hostPlatform.isDarwin then "yes" else "no";
 
   sandboxtest = ./sandbox.nix;
   relaxedsandboxtest = ./relaxedsandbox.nix;
diff --git a/pkgs/tools/nix/nix-init/default.nix b/pkgs/tools/nix/nix-init/default.nix
index 2784ac2518f1..9be2431d5958 100644
--- a/pkgs/tools/nix/nix-init/default.nix
+++ b/pkgs/tools/nix/nix-init/default.nix
@@ -52,9 +52,9 @@ rustPlatform.buildRustPackage rec {
     openssl
     zlib
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
 
diff --git a/pkgs/tools/nix/nixci/default.nix b/pkgs/tools/nix/nixci/default.nix
index 30e23c4f63ec..5075705a2c88 100644
--- a/pkgs/tools/nix/nixci/default.nix
+++ b/pkgs/tools/nix/nixci/default.nix
@@ -25,9 +25,9 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config installShellFiles nix ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     IOKit
     Security
     SystemConfiguration
diff --git a/pkgs/tools/nix/nixdoc/default.nix b/pkgs/tools/nix/nixdoc/default.nix
index b0b7bc82e0d8..70b49237f161 100644
--- a/pkgs/tools/nix/nixdoc/default.nix
+++ b/pkgs/tools/nix/nixdoc/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-5KV2VDsPmSgrdZIqCuQ5gjgCVs/Ki6uG6GTwjmtKLlQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.Security ];
 
   meta = with lib; {
     description = "Generate documentation for Nix functions";
diff --git a/pkgs/tools/nix/npins/default.nix b/pkgs/tools/nix/npins/default.nix
index 7ea75baab100..37f48f547062 100644
--- a/pkgs/tools/nix/npins/default.nix
+++ b/pkgs/tools/nix/npins/default.nix
@@ -21,7 +21,7 @@ in rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-YwMypBl+P1ygf4zUbkZlq4zPrOzf+lPOz2FLg2/xI3k=";
 
-  buildInputs = lib.optional stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]);
   nativeBuildInputs = [ makeWrapper ];
 
   # (Almost) all tests require internet
diff --git a/pkgs/tools/nix/statix/default.nix b/pkgs/tools/nix/statix/default.nix
index 9cc48659d419..079459f2a2d0 100644
--- a/pkgs/tools/nix/statix/default.nix
+++ b/pkgs/tools/nix/statix/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
   buildFeatures = lib.optional withJson "json";
 
   # tests are failing on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Lints and suggestions for the nix programming language";
diff --git a/pkgs/tools/package-management/akku/overrides.nix b/pkgs/tools/package-management/akku/overrides.nix
index 8617a3bdb5fc..ecc11d945377 100644
--- a/pkgs/tools/package-management/akku/overrides.nix
+++ b/pkgs/tools/package-management/akku/overrides.nix
@@ -11,8 +11,8 @@ let
   # debugging
   showLibs = pkg: old: { preCheck = "echo $CHEZSCHEMELIBDIRS"; };
   runTests = pkg: old: { doCheck = true; };
-  brokenOnAarch64 = _: lib.addMetaAttrs { broken = stdenv.isAarch64; };
-  brokenOnx86_64Darwin = lib.addMetaAttrs { broken = stdenv.isDarwin && stdenv.isx86_64; };
+  brokenOnAarch64 = _: lib.addMetaAttrs { broken = stdenv.hostPlatform.isAarch64; };
+  brokenOnx86_64Darwin = lib.addMetaAttrs { broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64; };
 in
 {
   chez-srfi = joinOverrides [
diff --git a/pkgs/tools/package-management/disnix/dysnomia/default.nix b/pkgs/tools/package-management/disnix/dysnomia/default.nix
index 48d1b7965112..92b880d1428f 100644
--- a/pkgs/tools/package-management/disnix/dysnomia/default.nix
+++ b/pkgs/tools/package-management/disnix/dysnomia/default.nix
@@ -61,12 +61,12 @@ stdenv.mkDerivation rec {
      (if enableNginxWebApplication then "--with-nginx" else "--without-nginx")
      (if enableXinetdService then "--with-xinetd" else "--without-xinetd")
      (if enableS6RCService then "--with-s6-rc" else "--without-s6-rc")
-     (if stdenv.isDarwin then "--with-launchd" else "--without-launchd")
+     (if stdenv.hostPlatform.isDarwin then "--with-launchd" else "--without-launchd")
      "--with-job-template=${jobTemplate}"
    ] ++ lib.optional enableLegacy "--enable-legacy";
 
   buildInputs = [ getopt netcat ]
-    ++ lib.optional stdenv.isLinux systemd
+    ++ lib.optional stdenv.hostPlatform.isLinux systemd
     ++ lib.optional enableEjabberdDump ejabberd
     ++ lib.optional enableMySQLDatabase mariadb.out
     ++ lib.optional enablePostgreSQLDatabase postgresql
diff --git a/pkgs/tools/package-management/dpkg/default.nix b/pkgs/tools/package-management/dpkg/default.nix
index db095e59c489..6b9c1f3c2edb 100644
--- a/pkgs/tools/package-management/dpkg/default.nix
+++ b/pkgs/tools/package-management/dpkg/default.nix
@@ -13,7 +13,7 @@
 , autoreconfHook
 , pkg-config
 , diffutils
-, glibc ? !stdenv.isDarwin
+, glibc ? !stdenv.hostPlatform.isDarwin
 , darwin
 }:
 
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     "--with-admindir=/var/lib/dpkg"
     "PERL_LIBDIR=$(out)/${perl.libPrefix}"
     "TAR=${gnutar}/bin/tar"
-  ] ++ lib.optional stdenv.isDarwin "--disable-linker-optimisations";
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-linker-optimisations";
 
   enableParallelBuilding = true;
 
@@ -67,13 +67,13 @@ stdenv.mkDerivation rec {
        --replace '"rm"' \"${coreutils}/bin/rm\" \
        --replace '"cat"' \"${coreutils}/bin/cat\" \
        --replace '"diff"' \"${diffutils}/bin/diff\"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
+  '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     substituteInPlace src/main/help.c \
        --replace '"ldconfig"' \"${glibc.bin}/bin/ldconfig\"
   '';
 
   buildInputs = [ perl zlib bzip2 xz zstd libmd ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreServices ];
   nativeBuildInputs = [ makeWrapper perl autoreconfHook pkg-config ];
 
   postInstall =
diff --git a/pkgs/tools/package-management/lix/common.nix b/pkgs/tools/package-management/lix/common.nix
index fce59cff1173..dd1580bc4336 100644
--- a/pkgs/tools/package-management/lix/common.nix
+++ b/pkgs/tools/package-management/lix/common.nix
@@ -65,7 +65,7 @@ assert (hash == null) -> (src != null);
 
   enableDocumentation ? stdenv.hostPlatform == stdenv.buildPlatform,
   enableStatic ? stdenv.hostPlatform.isStatic,
-  withAWS ? !enableStatic && (stdenv.isLinux || stdenv.isDarwin),
+  withAWS ? !enableStatic && (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin),
   aws-sdk-cpp,
   # RISC-V support in progress https://github.com/seccomp/libseccomp/pull/50
   withLibseccomp ? lib.meta.availableOn stdenv.hostPlatform libseccomp,
@@ -124,7 +124,7 @@ stdenv.mkDerivation {
       mdbook-linkcheck
       doxygen
     ]
-    ++ lib.optionals stdenv.isLinux [ util-linuxMinimal ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ util-linuxMinimal ];
 
   buildInputs =
     [
@@ -145,8 +145,8 @@ stdenv.mkDerivation {
       lix-doc
     ]
     ++ lib.optionals (!isLegacyParser) [ pegtl ]
-    ++ lib.optionals stdenv.isDarwin [ Security ]
-    ++ lib.optionals (stdenv.isx86_64) [ libcpuid ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ]
+    ++ lib.optionals (stdenv.hostPlatform.isx86_64) [ libcpuid ]
     ++ lib.optionals withLibseccomp [ libseccomp ]
     ++ lib.optionals withAWS [ aws-sdk-cpp ];
 
@@ -166,7 +166,7 @@ stdenv.mkDerivation {
       mkdir -p $out/lib
       cp -pd ${boost}/lib/{libboost_context*,libboost_thread*,libboost_system*} $out/lib
       rm -f $out/lib/*.a
-      ${lib.optionalString stdenv.isLinux ''
+      ${lib.optionalString stdenv.hostPlatform.isLinux ''
         chmod u+w $out/lib/*.so.*
         patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib $out/lib/libboost_thread.so.*
       ''}
@@ -194,14 +194,14 @@ stdenv.mkDerivation {
       (lib.mesonBool "enable-tests" true)
       (lib.mesonBool "enable-docs" enableDocumentation)
       (lib.mesonEnable "internal-api-docs" enableDocumentation)
-      (lib.mesonBool "enable-embedded-sandbox-shell" (stdenv.isLinux && stdenv.hostPlatform.isStatic))
+      (lib.mesonBool "enable-embedded-sandbox-shell" (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isStatic))
       (lib.mesonEnable "seccomp-sandboxing" withLibseccomp)
 
       (lib.mesonOption "store-dir" storeDir)
       (lib.mesonOption "state-dir" stateDir)
       (lib.mesonOption "sysconfdir" confDir)
     ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       (lib.mesonOption "sandbox-shell" "${busybox-sandbox-shell}/bin/busybox")
     ];
 
@@ -219,7 +219,7 @@ stdenv.mkDerivation {
       mkdir -p $out/nix-support
       echo "file binary-dist $out/bin/nix" >> $out/nix-support/hydra-build-products
     ''
-    + lib.optionalString stdenv.isDarwin ''
+    + lib.optionalString stdenv.hostPlatform.isDarwin ''
       for lib in liblixutil.dylib liblixexpr.dylib; do
         install_name_tool \
           -change "${lib.getLib boost}/lib/libboost_context.dylib" \
@@ -272,8 +272,8 @@ stdenv.mkDerivation {
   # fortify breaks the build with lto and musl for some reason
   ++ lib.optional stdenv.hostPlatform.isMusl "fortify";
 
-  # hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
-  separateDebugInfo = stdenv.isLinux && !enableStatic;
+  # hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
+  separateDebugInfo = stdenv.hostPlatform.isLinux && !enableStatic;
   enableParallelBuilding = true;
 
   # Used by (1) test which has dynamic port assignment.
diff --git a/pkgs/tools/package-management/mynewt-newt/default.nix b/pkgs/tools/package-management/mynewt-newt/default.nix
index 789a48655436..7f5fda624695 100644
--- a/pkgs/tools/package-management/mynewt-newt/default.nix
+++ b/pkgs/tools/package-management/mynewt-newt/default.nix
@@ -21,7 +21,7 @@ buildGoModule rec {
 
   # CGO_ENABLED=0 required for mac - "error: 'TARGET_OS_MAC' is not defined, evaluates to 0"
   # https://github.com/shirou/gopsutil/issues/976
-  CGO_ENABLED = if stdenv.isLinux then 1 else 0;
+  CGO_ENABLED = if stdenv.hostPlatform.isLinux then 1 else 0;
 
   meta = with lib; {
     homepage = "https://mynewt.apache.org/";
diff --git a/pkgs/tools/package-management/nix-doc/default.nix b/pkgs/tools/package-management/nix-doc/default.nix
index f7b3777f7f23..f594b0648bfa 100644
--- a/pkgs/tools/package-management/nix-doc/default.nix
+++ b/pkgs/tools/package-management/nix-doc/default.nix
@@ -38,7 +38,7 @@ rustPlatform.buildRustPackage rec {
 
   # Due to a Rust bug, setting -C relro-level to anything including "off" on
   # macOS will cause link errors
-  env = lib.optionalAttrs (withPlugin && stdenv.isLinux) {
+  env = lib.optionalAttrs (withPlugin && stdenv.hostPlatform.isLinux) {
     RUSTFLAGS = "-C relro-level=partial";
   };
 
diff --git a/pkgs/tools/package-management/nix-du/default.nix b/pkgs/tools/package-management/nix-du/default.nix
index 8b2463ccce4c..69289b8955b7 100644
--- a/pkgs/tools/package-management/nix-du/default.nix
+++ b/pkgs/tools/package-management/nix-du/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     boost
     nix
     nlohmann_json
-  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
 
diff --git a/pkgs/tools/package-management/nix-index/default.nix b/pkgs/tools/package-management/nix-index/default.nix
index b4b8b0832094..433ad82d4d2f 100644
--- a/pkgs/tools/package-management/nix-index/default.nix
+++ b/pkgs/tools/package-management/nix-index/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl curl sqlite ]
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     substituteInPlace command-not-found.sh \
diff --git a/pkgs/tools/package-management/nix-template/default.nix b/pkgs/tools/package-management/nix-template/default.nix
index 91c1f9b26807..1d0c6f42f517 100644
--- a/pkgs/tools/package-management/nix-template/default.nix
+++ b/pkgs/tools/package-management/nix-template/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # needed for nix-prefetch-url
   postInstall = ''
diff --git a/pkgs/tools/package-management/nix/common.nix b/pkgs/tools/package-management/nix/common.nix
index a6f9f3c5b594..c26cb410399d 100644
--- a/pkgs/tools/package-management/nix/common.nix
+++ b/pkgs/tools/package-management/nix/common.nix
@@ -76,7 +76,7 @@ in
 , xz
 , enableDocumentation ? stdenv.buildPlatform.canExecute stdenv.hostPlatform
 , enableStatic ? stdenv.hostPlatform.isStatic
-, withAWS ? !enableStatic && (stdenv.isLinux || stdenv.isDarwin), aws-sdk-cpp
+, withAWS ? !enableStatic && (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin), aws-sdk-cpp
 , withLibseccomp ? lib.meta.availableOn stdenv.hostPlatform libseccomp, libseccomp
 
 , confDir
@@ -101,7 +101,7 @@ self = stdenv.mkDerivation {
     [ "out" "dev" ]
     ++ lib.optionals enableDocumentation [ "man" "doc" ];
 
-  hardeningEnable = lib.optionals (!stdenv.isDarwin) [ "pie" ];
+  hardeningEnable = lib.optionals (!stdenv.hostPlatform.isDarwin) [ "pie" ];
 
   hardeningDisable = [
     "shadowstack"
@@ -126,7 +126,7 @@ self = stdenv.mkDerivation {
     mdbook
   ] ++ lib.optionals (atLeast213 && enableDocumentation) [
     mdbook-linkcheck
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     util-linuxMinimal
   ];
 
@@ -147,9 +147,9 @@ self = stdenv.mkDerivation {
     libgit2
   ] ++ lib.optionals (atLeast224 || lib.versionAtLeast version "pre20240626") [
     toml11
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
-  ] ++ lib.optionals (stdenv.isx86_64) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isx86_64) [
     libcpuid
   ] ++ lib.optionals atLeast214 [
     rapidcheck
@@ -177,7 +177,7 @@ self = stdenv.mkDerivation {
       mkdir -p $out/lib
       cp -pd ${boost}/lib/{libboost_context*,libboost_thread*,libboost_system*} $out/lib
       rm -f $out/lib/*.a
-      ${lib.optionalString stdenv.isLinux ''
+      ${lib.optionalString stdenv.hostPlatform.isLinux ''
         chmod u+w $out/lib/*.so.*
         patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib $out/lib/libboost_thread.so.*
       ''}
@@ -206,9 +206,9 @@ self = stdenv.mkDerivation {
     "--enable-gc"
   ] ++ lib.optionals (!enableDocumentation) [
     "--disable-doc-gen"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--with-sandbox-shell=${busybox-sandbox-shell}/bin/busybox"
-  ] ++ lib.optionals (atLeast210 && stdenv.isLinux && stdenv.hostPlatform.isStatic) [
+  ] ++ lib.optionals (atLeast210 && stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isStatic) [
     "--enable-embedded-sandbox-shell"
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform && stdenv.hostPlatform ? nix && stdenv.hostPlatform.nix ? system) [
     "--with-system=${stdenv.hostPlatform.nix.system}"
@@ -234,16 +234,16 @@ self = stdenv.mkDerivation {
   installCheckTarget = if atLeast210 then "installcheck" else null;
 
   # socket path becomes too long otherwise
-  preInstallCheck = lib.optionalString stdenv.isDarwin ''
+  preInstallCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export TMPDIR=$NIX_BUILD_TOP
   ''
   # Prevent crashes in libcurl due to invoking Objective-C `+initialize` methods after `fork`.
   # See http://sealiesoftware.com/blog/archive/2017/6/5/Objective-C_and_fork_in_macOS_1013.html.
-  + lib.optionalString stdenv.isDarwin ''
+  + lib.optionalString stdenv.hostPlatform.isDarwin ''
     export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
   ''
   # See https://github.com/NixOS/nix/issues/5687
-  + lib.optionalString (atLeast25 && stdenv.isDarwin) ''
+  + lib.optionalString (atLeast25 && stdenv.hostPlatform.isDarwin) ''
     echo "exit 99" > tests/gc-non-blocking.sh
   '' # TODO: investigate why this broken
   + lib.optionalString (atLeast25 && stdenv.hostPlatform.system == "aarch64-linux") ''
@@ -253,7 +253,7 @@ self = stdenv.mkDerivation {
     export MANPATH=$man/share/man:$MANPATH
   '';
 
-  separateDebugInfo = stdenv.isLinux && (atLeast24 -> !enableStatic);
+  separateDebugInfo = stdenv.hostPlatform.isLinux && (atLeast24 -> !enableStatic);
 
   enableParallelBuilding = true;
 
@@ -283,7 +283,7 @@ self = stdenv.mkDerivation {
         inherit lib pkgs;
         nix = self;
       };
-    } // lib.optionalAttrs stdenv.isLinux {
+    } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
       nixStatic = pkgsStatic.nixVersions.${self_attribute_name};
 
       # Basic smoke tests that needs to pass when upgrading nix.
diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index ab059abf912f..2ea39c85eb85 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -68,7 +68,7 @@ let
       rm aws-cpp-sdk-core-tests/aws/auth/AWSAuthSignerTest.cpp
       # TestRandomURLMultiThreaded fails
       rm aws-cpp-sdk-core-tests/http/HttpClientTest.cpp
-    '' + lib.optionalString aws-sdk-cpp.stdenv.isi686 ''
+    '' + lib.optionalString aws-sdk-cpp.stdenv.hostPlatform.isi686 ''
       # EPSILON is exceeded
       rm aws-cpp-sdk-core-tests/aws/client/AdaptiveRetryStrategyTest.cpp
     '';
@@ -214,7 +214,7 @@ in lib.makeExtensible (self: ({
     version = "2.24.7";
     hash = "sha256-NAyc5MR/T70umcSeMv7y3AVt00ZkmDXGm7LfYKTONfE=";
     self_attribute_name = "nix_2_24";
-  }).override (lib.optionalAttrs (stdenv.isDarwin && stdenv.isx86_64) {
+  }).override (lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) {
     # Fix the following error with the default x86_64-darwin SDK:
     #
     #     error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
@@ -235,7 +235,7 @@ in lib.makeExtensible (self: ({
       hash = "sha256-Hp7dkx7zfB9a4l5QusXUob0b1T2qdZ23LFo5dcp3xrU=";
     };
     self_attribute_name = "git";
-  }).override (lib.optionalAttrs (stdenv.isDarwin && stdenv.isx86_64) {
+  }).override (lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) {
     # Fix the following error with the default x86_64-darwin SDK:
     #
     #     error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
diff --git a/pkgs/tools/package-management/nix/nix-perl.nix b/pkgs/tools/package-management/nix/nix-perl.nix
index 4c93fcef564a..50e342e96cad 100644
--- a/pkgs/tools/package-management/nix/nix-perl.nix
+++ b/pkgs/tools/package-management/nix/nix-perl.nix
@@ -47,7 +47,7 @@ in stdenv.mkDerivation (finalAttrs: {
     nix
     perl
     xz
-  ] ++ lib.optional (stdenv.isDarwin) Security;
+  ] ++ lib.optional (stdenv.hostPlatform.isDarwin) Security;
 
   # Not cross-safe since Nix checks for curl/perl via
   # NEED_PROG/find_program, but both seem to be needed at runtime
@@ -65,7 +65,7 @@ in stdenv.mkDerivation (finalAttrs: {
   ]);
 
   # `perlPackages.Test2Harness` is marked broken for Darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   nativeCheckInputs = [
     perl.pkgs.Test2Harness
diff --git a/pkgs/tools/package-management/pkg/default.nix b/pkgs/tools/package-management/pkg/default.nix
index 92a2270e2d75..76890f4bd515 100644
--- a/pkgs/tools/package-management/pkg/default.nix
+++ b/pkgs/tools/package-management/pkg/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ m4 pkg-config tcl ];
   buildInputs = [ bzip2 elfutils libarchive openssl xz zlib ]
-    ++ lib.optional stdenv.isLinux libbsd;
+    ++ lib.optional stdenv.hostPlatform.isLinux libbsd;
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/tools/package-management/poetry/unwrapped.nix b/pkgs/tools/package-management/poetry/unwrapped.nix
index 71f1653dbdee..4a520f201883 100644
--- a/pkgs/tools/package-management/poetry/unwrapped.nix
+++ b/pkgs/tools/package-management/poetry/unwrapped.nix
@@ -81,7 +81,7 @@ buildPythonPackage rec {
     tomlkit
     trove-classifiers
     virtualenv
-  ] ++ lib.optionals (stdenv.isDarwin) [
+  ] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
     xattr
   ] ++ lib.optionals (pythonOlder "3.11") [
     tomli
@@ -102,18 +102,18 @@ buildPythonPackage rec {
     httpretty
     pytest-mock
     pytest-xdist
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.ps
   ];
 
   preCheck = (''
     export HOME=$TMPDIR
-  '' + lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     # https://github.com/python/cpython/issues/74570#issuecomment-1093748531
     export no_proxy='*';
   '');
 
-  postCheck = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  postCheck = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     unset no_proxy
   '';
 
diff --git a/pkgs/tools/package-management/rpm/default.nix b/pkgs/tools/package-management/rpm/default.nix
index ac9c498a9c89..ae4352ca0109 100644
--- a/pkgs/tools/package-management/rpm/default.nix
+++ b/pkgs/tools/package-management/rpm/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook pkg-config pandoc ];
   buildInputs = [ cpio zlib zstd bzip2 file libarchive libgcrypt nspr nss db xz python lua sqlite ]
     ++ lib.optional stdenv.cc.isClang llvmPackages.openmp
-    ++ lib.optional stdenv.isLinux libcap;
+    ++ lib.optional stdenv.hostPlatform.isLinux libcap;
 
   # rpm/rpmlib.h includes popt.h, and then the pkg-config file mentions these as linkage requirements
   propagatedBuildInputs = [ popt nss db bzip2 libarchive libbfd ]
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     "--enable-zstd"
     "--localstatedir=/var"
     "--sharedstatedir=/com"
-  ] ++ lib.optional stdenv.isLinux "--with-cap";
+  ] ++ lib.optional stdenv.hostPlatform.isLinux "--with-cap";
 
   postPatch = ''
     substituteInPlace Makefile.am --replace '@$(MKDIR_P) $(DESTDIR)$(localstatedir)/tmp' ""
diff --git a/pkgs/tools/security/acsccid/default.nix b/pkgs/tools/security/acsccid/default.nix
index 74a0c39cb2d7..8bf7ae948000 100644
--- a/pkgs/tools/security/acsccid/default.nix
+++ b/pkgs/tools/security/acsccid/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     pcsclite
     libusb1
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libiconv
   ];
 
diff --git a/pkgs/tools/security/adreaper/default.nix b/pkgs/tools/security/adreaper/default.nix
index 873760250618..4e7c554e9164 100644
--- a/pkgs/tools/security/adreaper/default.nix
+++ b/pkgs/tools/security/adreaper/default.nix
@@ -17,7 +17,7 @@ buildGoModule rec {
 
   vendorHash = "sha256-lU39kj/uz0l7Rodsu6+UMv2o579eu1KUbutUNZni7bM=";
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mv $out/bin/ADReaper $out/bin/$pname
   '';
 
diff --git a/pkgs/tools/security/age-plugin-ledger/default.nix b/pkgs/tools/security/age-plugin-ledger/default.nix
index 516edc55db39..c20429968f4e 100644
--- a/pkgs/tools/security/age-plugin-ledger/default.nix
+++ b/pkgs/tools/security/age-plugin-ledger/default.nix
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     libusb1
     openssl
-  ] ++ lib.optional stdenv.isDarwin AppKit;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin AppKit;
 
   nativeCheckInputs = [
     rage
diff --git a/pkgs/tools/security/age-plugin-yubikey/default.nix b/pkgs/tools/security/age-plugin-yubikey/default.nix
index e69d4dc789fb..9022442f62a8 100644
--- a/pkgs/tools/security/age-plugin-yubikey/default.nix
+++ b/pkgs/tools/security/age-plugin-yubikey/default.nix
@@ -30,8 +30,8 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     openssl
   ]
-  ++ lib.optional stdenv.isLinux pcsclite
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optional stdenv.hostPlatform.isLinux pcsclite
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     IOKit
     Foundation
     PCSC
diff --git a/pkgs/tools/security/amber/default.nix b/pkgs/tools/security/amber/default.nix
index 5cb96596564c..a02c0a7236cf 100644
--- a/pkgs/tools/security/amber/default.nix
+++ b/pkgs/tools/security/amber/default.nix
@@ -14,7 +14,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Joy+SO1zR78Eh5eK2bxyT0l3hCuLX/J3u/UvN+++6vg=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Manage secret values in-repo via public key cryptography";
diff --git a/pkgs/tools/security/arti/default.nix b/pkgs/tools/security/arti/default.nix
index 21d8ee4ae154..1e93dae95961 100644
--- a/pkgs/tools/security/arti/default.nix
+++ b/pkgs/tools/security/arti/default.nix
@@ -23,11 +23,11 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-I45SaawWAK7iTZDFhJT4YVO439D/3NmWLp3FtFmhLC0=";
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
   buildInputs = [ sqlite ]
-    ++ lib.optionals stdenv.isLinux [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ openssl ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   cargoBuildFlags = [ "--package" "arti" ];
 
diff --git a/pkgs/tools/security/authoscope/default.nix b/pkgs/tools/security/authoscope/default.nix
index b44f8bec2f7f..e30a00ff5be1 100644
--- a/pkgs/tools/security/authoscope/default.nix
+++ b/pkgs/tools/security/authoscope/default.nix
@@ -32,7 +32,7 @@ rustPlatform.buildRustPackage rec {
     libcap
     zlib
     openssl
-  ] ++ lib.optional stdenv.isDarwin Security;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     installManPage docs/${pname}.1
diff --git a/pkgs/tools/security/bettercap/default.nix b/pkgs/tools/security/bettercap/default.nix
index db1104447951..5594bc106beb 100644
--- a/pkgs/tools/security/bettercap/default.nix
+++ b/pkgs/tools/security/bettercap/default.nix
@@ -25,7 +25,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ libpcap libusb1 ]
-    ++ lib.optionals stdenv.isLinux [ libnfnetlink libnetfilter_queue ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libnfnetlink libnetfilter_queue ];
 
   meta = with lib; {
     description = "Man in the middle tool";
diff --git a/pkgs/tools/security/boofuzz/default.nix b/pkgs/tools/security/boofuzz/default.nix
index 5c2418cad665..b254b9d3d191 100644
--- a/pkgs/tools/security/boofuzz/default.nix
+++ b/pkgs/tools/security/boofuzz/default.nix
@@ -46,7 +46,7 @@ python3.pkgs.buildPythonApplication rec {
     "TestNoResponseFailure"
     "TestProcessMonitor"
     "TestSocketConnection"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "test_time_repeater"
   ];
 
diff --git a/pkgs/tools/security/browserpass/default.nix b/pkgs/tools/security/browserpass/default.nix
index 463501a05eb0..4c58039e899a 100644
--- a/pkgs/tools/security/browserpass/default.nix
+++ b/pkgs/tools/security/browserpass/default.nix
@@ -20,7 +20,7 @@ buildGoModule rec {
     sha256 = "sha256-UZzOPRRiCUIG7uSSp9AEPMDN/+4cgyK47RhrI8oUx8U=";
   };
 
-  nativeBuildInputs = [ makeWrapper ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  nativeBuildInputs = [ makeWrapper ] ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   vendorHash = "sha256-CjuH4ANP2bJDeA+o+1j+obbtk5/NVLet/OFS3Rms4r0=";
 
diff --git a/pkgs/tools/security/bws/default.nix b/pkgs/tools/security/bws/default.nix
index 4621bb1da5d0..0482ee954583 100644
--- a/pkgs/tools/security/bws/default.nix
+++ b/pkgs/tools/security/bws/default.nix
@@ -32,17 +32,17 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [
     installShellFiles
     pkg-config
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     perl
   ];
 
   buildInputs =
     [
       oniguruma
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       openssl
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.SystemConfiguration
     ];
 
diff --git a/pkgs/tools/security/cdk-go/default.nix b/pkgs/tools/security/cdk-go/default.nix
index 93c0c1aa4964..0282bf20f79b 100644
--- a/pkgs/tools/security/cdk-go/default.nix
+++ b/pkgs/tools/security/cdk-go/default.nix
@@ -27,6 +27,6 @@ buildGoModule rec {
     license = with licenses; [ gpl2Only ];
     maintainers = with maintainers; [ fab ];
     mainProgram = "cdk";
-    broken = stdenv.isDarwin; # needs to update gopsutil to at least v3.21.3 to include https://github.com/shirou/gopsutil/pull/1042
+    broken = stdenv.hostPlatform.isDarwin; # needs to update gopsutil to at least v3.21.3 to include https://github.com/shirou/gopsutil/pull/1042
   };
 }
diff --git a/pkgs/tools/security/cdxgen/default.nix b/pkgs/tools/security/cdxgen/default.nix
index 3a6c14ea5f1c..6ea34ed4a834 100644
--- a/pkgs/tools/security/cdxgen/default.nix
+++ b/pkgs/tools/security/cdxgen/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
     node-gyp # required for sqlite3 bindings
     pnpm_9.configHook
     python3 # required for sqlite3 bindings
-  ] ++ lib.optional stdenv.isDarwin [ xcbuild ];
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin [ xcbuild ];
 
   pnpmDeps = pnpm_9.fetchDeps {
     inherit (finalAttrs) pname version src;
diff --git a/pkgs/tools/security/certdump/default.nix b/pkgs/tools/security/certdump/default.nix
index 8615fda62b49..409650ac938b 100644
--- a/pkgs/tools/security/certdump/default.nix
+++ b/pkgs/tools/security/certdump/default.nix
@@ -41,6 +41,6 @@ buildDotnetModule rec {
     license = licenses.asl20;
     maintainers = [ maintainers.baloo ];
     # net5 has no osx-arm64 target available
-    broken = stdenv.isDarwin && stdenv.isAarch64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64;
   };
 }
diff --git a/pkgs/tools/security/certinfo/default.nix b/pkgs/tools/security/certinfo/default.nix
index f40b2a1eff01..3d48985d78a5 100644
--- a/pkgs/tools/security/certinfo/default.nix
+++ b/pkgs/tools/security/certinfo/default.nix
@@ -12,11 +12,11 @@ buildGoModule rec {
   };
 
   # clipboard functionality not working on Darwin
-  doCheck = !(stdenv.isDarwin && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64);
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ libX11 ]
-    ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libX11 ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.Cocoa ];
 
   vendorHash = null;
 
diff --git a/pkgs/tools/security/chainsaw/default.nix b/pkgs/tools/security/chainsaw/default.nix
index b529956a9655..78eabff9d465 100644
--- a/pkgs/tools/security/chainsaw/default.nix
+++ b/pkgs/tools/security/chainsaw/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-1w3DYP69aOphoqbsZIF9aX56Lftg2niKClmImLTa5DE=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.CoreFoundation ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.CoreFoundation ];
 
   ldflags = [
     "-w"
diff --git a/pkgs/tools/security/cherrybomb/default.nix b/pkgs/tools/security/cherrybomb/default.nix
index 139ac5aea1ad..38783319e7c7 100644
--- a/pkgs/tools/security/cherrybomb/default.nix
+++ b/pkgs/tools/security/cherrybomb/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-pj4+rG8XbrxVuNgnTVUTPmgrPBRSnoBnqFhOO/JGGWI=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/security/chipsec/default.nix b/pkgs/tools/security/chipsec/default.nix
index 304b10ca8abb..73c1ade5bd63 100644
--- a/pkgs/tools/security/chipsec/default.nix
+++ b/pkgs/tools/security/chipsec/default.nix
@@ -12,7 +12,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "chipsec";
   version = "1.10.6";
 
-  disabled = !stdenv.isLinux;
+  disabled = !stdenv.hostPlatform.isLinux;
 
   src = fetchFromGitHub {
     owner = "chipsec";
diff --git a/pkgs/tools/security/clamav/default.nix b/pkgs/tools/security/clamav/default.nix
index b44ccd5394a6..87471065098a 100644
--- a/pkgs/tools/security/clamav/default.nix
+++ b/pkgs/tools/security/clamav/default.nix
@@ -23,8 +23,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake pkg-config rustc rust-bindgen rustfmt cargo python3 ];
   buildInputs = [
     zlib bzip2 libxml2 openssl ncurses curl libiconv libmilter pcre2 libmspack json_c check
-  ] ++ lib.optional stdenv.isLinux systemd
-    ++ lib.optional stdenv.isDarwin Foundation;
+  ] ++ lib.optional stdenv.hostPlatform.isLinux systemd
+    ++ lib.optional stdenv.hostPlatform.isDarwin Foundation;
 
   cmakeFlags = [
     "-DSYSTEMD_UNIT_DIR=${placeholder "out"}/lib/systemd"
diff --git a/pkgs/tools/security/cosign/default.nix b/pkgs/tools/security/cosign/default.nix
index 24092e58423e..7d416cbdb6f8 100644
--- a/pkgs/tools/security/cosign/default.nix
+++ b/pkgs/tools/security/cosign/default.nix
@@ -23,8 +23,8 @@ buildGoModule rec {
   };
 
   buildInputs =
-    lib.optional (stdenv.isLinux && pivKeySupport) (lib.getDev pcsclite)
-    ++ lib.optionals (stdenv.isDarwin && pivKeySupport) [ PCSC ];
+    lib.optional (stdenv.hostPlatform.isLinux && pivKeySupport) (lib.getDev pcsclite)
+    ++ lib.optionals (stdenv.hostPlatform.isDarwin && pivKeySupport) [ PCSC ];
 
   nativeBuildInputs = [ pkg-config installShellFiles ];
 
diff --git a/pkgs/tools/security/echidna/default.nix b/pkgs/tools/security/echidna/default.nix
index a8e812219ba5..f3bfb9fbffee 100644
--- a/pkgs/tools/security/echidna/default.nix
+++ b/pkgs/tools/security/echidna/default.nix
@@ -110,7 +110,7 @@ mkDerivation (
     mainProgram = "echidna-test";
 
   }
-  // lib.optionalAttrs (stdenv.isDarwin && stdenv.isAarch64) {
+  // lib.optionalAttrs (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) {
 
     # https://github.com/NixOS/nixpkgs/pull/304352
     postInstall = with haskellPackages; ''
diff --git a/pkgs/tools/security/feroxbuster/default.nix b/pkgs/tools/security/feroxbuster/default.nix
index f4e361332e96..64975a04c9f4 100644
--- a/pkgs/tools/security/feroxbuster/default.nix
+++ b/pkgs/tools/security/feroxbuster/default.nix
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     Security
     SystemConfiguration
   ];
diff --git a/pkgs/tools/security/firefox_decrypt/default.nix b/pkgs/tools/security/firefox_decrypt/default.nix
index 2799a990975a..52dc4a9bd71f 100644
--- a/pkgs/tools/security/firefox_decrypt/default.nix
+++ b/pkgs/tools/security/firefox_decrypt/default.nix
@@ -29,7 +29,7 @@ buildPythonApplication rec {
 
   makeWrapperArgs = [
     "--prefix"
-    (if stdenv.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH")
+    (if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH")
     ":"
     (lib.makeLibraryPath [ nss ])
   ];
diff --git a/pkgs/tools/security/freeze/default.nix b/pkgs/tools/security/freeze/default.nix
index 28ef21657009..e828ed79bf4c 100644
--- a/pkgs/tools/security/freeze/default.nix
+++ b/pkgs/tools/security/freeze/default.nix
@@ -22,7 +22,7 @@ buildGoModule rec {
     "-w"
   ];
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mv $out/bin/Freeze $out/bin/freeze
   '';
 
diff --git a/pkgs/tools/security/genpass/default.nix b/pkgs/tools/security/genpass/default.nix
index 0c326c2dac66..f1e9a197680b 100644
--- a/pkgs/tools/security/genpass/default.nix
+++ b/pkgs/tools/security/genpass/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-ls3tzZ+gtZQlObmbtwJDq6N/f5nY+Ps7RL5R/fR5Vgg=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreFoundation libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreFoundation libiconv Security ];
 
   meta = with lib; {
     description = "Simple yet robust commandline random password generator";
diff --git a/pkgs/tools/security/gfshare/default.nix b/pkgs/tools/security/gfshare/default.nix
index e0da2fdaf35b..caf04cee0d5c 100644
--- a/pkgs/tools/security/gfshare/default.nix
+++ b/pkgs/tools/security/gfshare/default.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     platforms = platforms.all;
     maintainers = [ maintainers.rraval ];
-    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gfshare.x86_64-darwin
+    broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/gfshare.x86_64-darwin
   };
 }
diff --git a/pkgs/tools/security/ghidra/build.nix b/pkgs/tools/security/ghidra/build.nix
index 994cee822a16..b898147d9a21 100644
--- a/pkgs/tools/security/ghidra/build.nix
+++ b/pkgs/tools/security/ghidra/build.nix
@@ -112,7 +112,7 @@ stdenv.mkDerivation (finalAttrs: {
       python3
       python3Packages.pip
     ]
-    ++ lib.optionals stdenv.isDarwin [
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       xcbuild
       desktopToDarwinBundle
     ];
@@ -196,6 +196,6 @@ stdenv.mkDerivation (finalAttrs: {
       roblabla
       vringar
     ];
-    broken = stdenv.isDarwin && stdenv.isx86_64;
+    broken = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64;
   };
 })
diff --git a/pkgs/tools/security/ghidra/default.nix b/pkgs/tools/security/ghidra/default.nix
index 55f224da511b..8f39076b4eec 100644
--- a/pkgs/tools/security/ghidra/default.nix
+++ b/pkgs/tools/security/ghidra/default.nix
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     makeWrapper
     icoutils
-  ] ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   buildInputs = [
     stdenv.cc.cc.lib
diff --git a/pkgs/tools/security/gitjacker/default.nix b/pkgs/tools/security/gitjacker/default.nix
index 5303e169e8dd..83e8b91f8b28 100644
--- a/pkgs/tools/security/gitjacker/default.nix
+++ b/pkgs/tools/security/gitjacker/default.nix
@@ -22,7 +22,7 @@ buildGoModule rec {
 
   nativeCheckInputs = [ git ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   preCheck = ''
     export PATH=$TMPDIR/usr/bin:$PATH
diff --git a/pkgs/tools/security/gnupg/22.nix b/pkgs/tools/security/gnupg/22.nix
index 5181f78e8a2e..e0fdf3361f9b 100644
--- a/pkgs/tools/security/gnupg/22.nix
+++ b/pkgs/tools/security/gnupg/22.nix
@@ -4,7 +4,7 @@
 , adns, bzip2, gnutls, libusb1, openldap, readline, sqlite, zlib
 , enableMinimal ? false
 , withPcsc ? !enableMinimal, pcsclite
-, guiSupport ? stdenv.isDarwin, pinentry
+, guiSupport ? stdenv.hostPlatform.isDarwin, pinentry
 , nixosTests
 }:
 
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     # Fix broken SOURCE_DATE_EPOCH usage - remove on the next upstream update
     sed -i 's/$SOURCE_DATE_EPOCH/''${SOURCE_DATE_EPOCH}/' doc/Makefile.am
     sed -i 's/$SOURCE_DATE_EPOCH/''${SOURCE_DATE_EPOCH}/' doc/Makefile.in
-    '' + lib.optionalString (stdenv.isLinux && withPcsc) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isLinux && withPcsc) ''
       sed -i 's,"libpcsclite\.so[^"]*","${lib.getLib pcsclite}/lib/libpcsclite.so",g' scd/scdaemon.c
     '';
 
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
     "GPGRT_CONFIG=${lib.getDev libgpg-error}/bin/gpgrt-config"
   ]
   ++ lib.optional guiSupport "--with-pinentry-pgm=${pinentry}/${pinentry.binaryPath or "bin/pinentry"}"
-  ++ lib.optional stdenv.isDarwin "--disable-ccid-driver";
+  ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-ccid-driver";
 
   postInstall = if enableMinimal
   then ''
diff --git a/pkgs/tools/security/gnupg/24.nix b/pkgs/tools/security/gnupg/24.nix
index ef1b2e1db518..8c709e9b739a 100644
--- a/pkgs/tools/security/gnupg/24.nix
+++ b/pkgs/tools/security/gnupg/24.nix
@@ -4,8 +4,8 @@
 , adns, bzip2, gnutls, libusb1, openldap, readline, sqlite, zlib
 , enableMinimal ? false
 , withPcsc ? !enableMinimal, pcsclite
-, guiSupport ? stdenv.isDarwin, pinentry
-, withTpm2Tss ? !stdenv.isDarwin && !enableMinimal, tpm2-tss
+, guiSupport ? stdenv.hostPlatform.isDarwin, pinentry
+, withTpm2Tss ? !stdenv.hostPlatform.isDarwin && !enableMinimal, tpm2-tss
 , nixosTests
 }:
 
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     sed -i 's,\(hkps\|https\)://keyserver.ubuntu.com,hkps://keys.openpgp.org,g' configure configure.ac doc/dirmngr.texi doc/gnupg.info-1
-    '' + lib.optionalString (stdenv.isLinux && withPcsc) ''
+    '' + lib.optionalString (stdenv.hostPlatform.isLinux && withPcsc) ''
       sed -i 's,"libpcsclite\.so[^"]*","${lib.getLib pcsclite}/lib/libpcsclite.so",g' scd/scdaemon.c
     '';
 
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
   ]
   ++ lib.optional guiSupport "--with-pinentry-pgm=${pinentry}/${pinentry.binaryPath or "bin/pinentry"}"
   ++ lib.optional withTpm2Tss "--with-tss=intel"
-  ++ lib.optional stdenv.isDarwin "--disable-ccid-driver";
+  ++ lib.optional stdenv.hostPlatform.isDarwin "--disable-ccid-driver";
 
   postInstall = if enableMinimal
   then ''
diff --git a/pkgs/tools/security/go365/default.nix b/pkgs/tools/security/go365/default.nix
index 381df6d74629..12fad051584d 100644
--- a/pkgs/tools/security/go365/default.nix
+++ b/pkgs/tools/security/go365/default.nix
@@ -17,7 +17,7 @@ buildGoModule rec {
 
   vendorHash = "sha256-Io+69kIW4DV2EkA73pjaTcTRbDSYBf61R7F+141Jojs=";
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mv $out/bin/Go365 $out/bin/$pname
   '';
 
diff --git a/pkgs/tools/security/gopass/default.nix b/pkgs/tools/security/gopass/default.nix
index fc16820d1c97..68b794214f6e 100644
--- a/pkgs/tools/security/gopass/default.nix
+++ b/pkgs/tools/security/gopass/default.nix
@@ -35,7 +35,7 @@ buildGoModule rec {
       git
       gnupg
       xclip
-    ] ++ lib.optional stdenv.isLinux wl-clipboard
+    ] ++ lib.optional stdenv.hostPlatform.isLinux wl-clipboard
   );
 
   postInstall = ''
diff --git a/pkgs/tools/security/gpg-tui/default.nix b/pkgs/tools/security/gpg-tui/default.nix
index ba07ffb9e67f..5c4dd4620eaf 100644
--- a/pkgs/tools/security/gpg-tui/default.nix
+++ b/pkgs/tools/security/gpg-tui/default.nix
@@ -40,7 +40,7 @@ rustPlatform.buildRustPackage rec {
   ] ++ lib.optionals x11Support [
     libxcb
     libxkbcommon
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Foundation
     libiconv
diff --git a/pkgs/tools/security/ibm-sw-tpm2/default.nix b/pkgs/tools/security/ibm-sw-tpm2/default.nix
index 76123a7c893f..7792165d2587 100644
--- a/pkgs/tools/security/ibm-sw-tpm2/default.nix
+++ b/pkgs/tools/security/ibm-sw-tpm2/default.nix
@@ -6,7 +6,7 @@
 }:
 let
   makefile =
-    if stdenv.isDarwin
+    if stdenv.hostPlatform.isDarwin
     then "makefile.mac"
     else "makefile";
 in
diff --git a/pkgs/tools/security/jwt-cli/default.nix b/pkgs/tools/security/jwt-cli/default.nix
index 2dc57e8c0713..988864cbf7dc 100644
--- a/pkgs/tools/security/jwt-cli/default.nix
+++ b/pkgs/tools/security/jwt-cli/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
     installShellCompletion --cmd jwt \
diff --git a/pkgs/tools/security/kbs2/default.nix b/pkgs/tools/security/kbs2/default.nix
index ae16b3f00c9a..04c6923af041 100644
--- a/pkgs/tools/security/kbs2/default.nix
+++ b/pkgs/tools/security/kbs2/default.nix
@@ -23,18 +23,18 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-LcnvCWGVdBxhDgQDoGHXRppGeEpfjOv/F0dZMN2bOF8=";
 
   nativeBuildInputs = [ installShellFiles ]
-    ++ lib.optionals stdenv.isLinux [ python3 ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ python3 ];
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ libxcb ]
-    ++ lib.optionals stdenv.isDarwin [ SystemConfiguration AppKit ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libxcb ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ SystemConfiguration AppKit ];
 
   preCheck = ''
     export HOME=$TMPDIR
   '';
 
   checkFlags = [ "--skip=kbs2::config::tests::test_find_config_dir" ]
-    ++ lib.optionals stdenv.isDarwin [ "--skip=test_ragelib_rewrap_keyfile" ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ "--skip=test_ragelib_rewrap_keyfile" ];
 
   postInstall = ''
     mkdir -p $out/share/kbs2
diff --git a/pkgs/tools/security/keepwn/default.nix b/pkgs/tools/security/keepwn/default.nix
index 9c878f37fd0c..8306cbe441ea 100644
--- a/pkgs/tools/security/keepwn/default.nix
+++ b/pkgs/tools/security/keepwn/default.nix
@@ -29,7 +29,7 @@ python3.pkgs.buildPythonApplication rec {
     termcolor
   ];
 
-  postInstall = lib.optionalString (!stdenv.isDarwin) ''
+  postInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     mv $out/bin/KeePwn $out/bin/$pname
   '';
 
diff --git a/pkgs/tools/security/kepler/default.nix b/pkgs/tools/security/kepler/default.nix
index e4d2fc914cf9..35e601dac163 100644
--- a/pkgs/tools/security/kepler/default.nix
+++ b/pkgs/tools/security/kepler/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
     openssl
     postgresql
     zstd
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/security/keybase/default.nix b/pkgs/tools/security/keybase/default.nix
index d8457c487253..103066261a19 100644
--- a/pkgs/tools/security/keybase/default.nix
+++ b/pkgs/tools/security/keybase/default.nix
@@ -28,7 +28,7 @@ buildGoModule rec {
     })
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ AppKit AVFoundation AudioToolbox ImageIO CoreMedia Foundation CoreGraphics MediaToolbox ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ AppKit AVFoundation AudioToolbox ImageIO CoreMedia Foundation CoreGraphics MediaToolbox ];
   tags = [ "production" ];
   ldflags = [ "-s" "-w" ];
 
diff --git a/pkgs/tools/security/keyscope/default.nix b/pkgs/tools/security/keyscope/default.nix
index ae5bd80e2964..b2bd09d1f44a 100644
--- a/pkgs/tools/security/keyscope/default.nix
+++ b/pkgs/tools/security/keyscope/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     DiskArbitration
     Foundation
     IOKit
diff --git a/pkgs/tools/security/kpcli/default.nix b/pkgs/tools/security/kpcli/default.nix
index 5a3b0a75862f..f7e636f8facc 100644
--- a/pkgs/tools/security/kpcli/default.nix
+++ b/pkgs/tools/security/kpcli/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
     makeWrapper $out/share/kpcli.pl $out/bin/kpcli --set PERL5LIB \
       "${with perlPackages; makePerlPath ([
          CaptureTiny Clipboard Clone CryptRijndael SortNaturally TermReadKey TermShellUI FileKeePass TermReadLineGnu XMLParser
-      ] ++ lib.optional stdenv.isDarwin MacPasteboard)}"
+      ] ++ lib.optional stdenv.hostPlatform.isDarwin MacPasteboard)}"
   '';
 
 
diff --git a/pkgs/tools/security/kubeclarity/default.nix b/pkgs/tools/security/kubeclarity/default.nix
index 585b4d35cd69..25a6582695e7 100644
--- a/pkgs/tools/security/kubeclarity/default.nix
+++ b/pkgs/tools/security/kubeclarity/default.nix
@@ -26,7 +26,7 @@ buildGoModule rec {
     pkg-config
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
+  buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
     btrfs-progs
     lvm2
   ];
diff --git a/pkgs/tools/security/lethe/default.nix b/pkgs/tools/security/lethe/default.nix
index ff9b297d5361..21875006f4fc 100644
--- a/pkgs/tools/security/lethe/default.nix
+++ b/pkgs/tools/security/lethe/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-SFNNpbHZdDJvH95f+VWyVKnQp3OJwQmCOqHtLAhhkOk=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Tool to wipe drives in a secure way";
diff --git a/pkgs/tools/security/libacr38u/default.nix b/pkgs/tools/security/libacr38u/default.nix
index 5211f42b96ef..45db3985d555 100644
--- a/pkgs/tools/security/libacr38u/default.nix
+++ b/pkgs/tools/security/libacr38u/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ pcsclite libusb-compat-0_1 ]
-    ++ lib.optional stdenv.isDarwin IOKit;
+    ++ lib.optional stdenv.hostPlatform.isDarwin IOKit;
 
   preBuild = ''
     makeFlagsArray=(usbdropdir="$out/pcsc/drivers");
diff --git a/pkgs/tools/security/maigret/default.nix b/pkgs/tools/security/maigret/default.nix
index cdbf6df4dd0f..0936e0d98062 100644
--- a/pkgs/tools/security/maigret/default.nix
+++ b/pkgs/tools/security/maigret/default.nix
@@ -92,7 +92,7 @@ python3.pkgs.buildPythonApplication rec {
     "test_pdf_report"
     "test_self_check_db_negative_enabled"
     "test_self_check_db_positive_enable"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     # AsyncioProgressbarExecutor is slower on darwin than it should be,
     # Upstream issue: https://github.com/soxoj/maigret/issues/679
     "test_asyncio_progressbar_executor"
diff --git a/pkgs/tools/security/masscan/default.nix b/pkgs/tools/security/masscan/default.nix
index a6aa990c1d82..9606fe0f1156 100644
--- a/pkgs/tools/security/masscan/default.nix
+++ b/pkgs/tools/security/masscan/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     # Fix broken install command
     substituteInPlace Makefile --replace "-pm755" "-pDm755"
   '';
diff --git a/pkgs/tools/security/mkp224o/default.nix b/pkgs/tools/security/mkp224o/default.nix
index 53b0e38a0dca..318284a4318f 100644
--- a/pkgs/tools/security/mkp224o/default.nix
+++ b/pkgs/tools/security/mkp224o/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
         { suffix = "donna";         configureFlags = ["--enable-donna"]; }
       ] ++ lib.optionals stdenv.hostPlatform.isx86 [
         { suffix = "donna-sse2";    configureFlags = ["--enable-donna-sse2"]; }
-      ] ++ lib.optionals (!stdenv.isDarwin && stdenv.isx86_64) [
+      ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) [
         { suffix = "amd64-51-30k";  configureFlags = ["--enable-amd64-51-30k"]; }
         { suffix = "amd64-64-24k";  configureFlags = ["--enable-amd64-64-24k"]; }
       ];
diff --git a/pkgs/tools/security/monsoon/default.nix b/pkgs/tools/security/monsoon/default.nix
index e17081487db2..78bf95ac6c8b 100644
--- a/pkgs/tools/security/monsoon/default.nix
+++ b/pkgs/tools/security/monsoon/default.nix
@@ -18,7 +18,7 @@ buildGoModule rec {
   vendorHash = "sha256-gdoOBW5MD94RiKINVtTDvBQRZaJ9tlgu0eh7MxuMezg=";
 
   # Tests fails on darwin
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = with lib; {
     description = "Fast HTTP enumerator";
diff --git a/pkgs/tools/security/mpw/default.nix b/pkgs/tools/security/mpw/default.nix
index 4ee765bdbdd1..5900c72bcff3 100644
--- a/pkgs/tools/security/mpw/default.nix
+++ b/pkgs/tools/security/mpw/default.nix
@@ -45,7 +45,7 @@ in stdenv.mkDerivation rec {
 
   # Some tests are expected to fail on ARM64
   # See: https://gitlab.com/spectre.app/cli/-/issues/27#note_962950844 (mpw is a predecessor to spectre-cli and this issue is relevant to mpw as well)
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   checkPhase = ''
     runHook preCheck
diff --git a/pkgs/tools/security/nbtscanner/default.nix b/pkgs/tools/security/nbtscanner/default.nix
index b70f554f33fd..ec6d9a1d661b 100644
--- a/pkgs/tools/security/nbtscanner/default.nix
+++ b/pkgs/tools/security/nbtscanner/default.nix
@@ -22,7 +22,7 @@ rustPlatform.buildRustPackage rec {
     ./Cargo.lock.patch
   ];
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "NetBIOS scanner written in Rust";
diff --git a/pkgs/tools/security/netexec/default.nix b/pkgs/tools/security/netexec/default.nix
index 33447f98516e..06163309b11b 100644
--- a/pkgs/tools/security/netexec/default.nix
+++ b/pkgs/tools/security/netexec/default.nix
@@ -101,6 +101,6 @@ python.pkgs.buildPythonApplication rec {
     # FIXME: failing fixupPhase:
     # $ Rewriting #!/nix/store/<hash>-python3-3.11.7/bin/python3.11 to #!/nix/store/<hash>-python3-3.11.7
     # $ /nix/store/<hash>-wrap-python-hook/nix-support/setup-hook: line 65: 47758 Killed: 9               sed -i "$f" -e "1 s^#!/nix/store/<hash>-python3-3.11.7^#!/nix/store/<hash>-python3-3.11.7^"
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/security/nitrokey-app2/default.nix b/pkgs/tools/security/nitrokey-app2/default.nix
index c675bcc9824f..28d9c74e5dc2 100644
--- a/pkgs/tools/security/nitrokey-app2/default.nix
+++ b/pkgs/tools/security/nitrokey-app2/default.nix
@@ -26,7 +26,7 @@ python3.pkgs.buildPythonApplication rec {
     wrapQtAppsHook
   ];
 
-  buildInputs = [ qtbase ] ++ lib.optionals stdenv.isLinux [
+  buildInputs = [ qtbase ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     qtwayland
   ];
 
diff --git a/pkgs/tools/security/oath-toolkit/default.nix b/pkgs/tools/security/oath-toolkit/default.nix
index 1e5b418c3f46..aa4255860469 100644
--- a/pkgs/tools/security/oath-toolkit/default.nix
+++ b/pkgs/tools/security/oath-toolkit/default.nix
@@ -3,7 +3,7 @@
 let
   # TODO: Switch to OpenPAM once https://gitlab.com/oath-toolkit/oath-toolkit/-/issues/26 is addressed upstream
   securityDependency =
-    if stdenv.isDarwin then xmlsec
+    if stdenv.hostPlatform.isDarwin then xmlsec
     else pam;
 
 in stdenv.mkDerivation rec {
@@ -17,7 +17,7 @@ in stdenv.mkDerivation rec {
 
   buildInputs = [ securityDependency ];
 
-  configureFlags = lib.optionals stdenv.isDarwin [ "--disable-pam" ];
+  configureFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "--disable-pam" ];
 
   passthru.updateScript = nix-update-script { };
 
diff --git a/pkgs/tools/security/onioncircuits/default.nix b/pkgs/tools/security/onioncircuits/default.nix
index 048631e2b774..8693d35dfa99 100644
--- a/pkgs/tools/security/onioncircuits/default.nix
+++ b/pkgs/tools/security/onioncircuits/default.nix
@@ -48,7 +48,7 @@ python3.pkgs.buildPythonApplication rec {
   '';
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "https://tails.boum.org";
     description = "GTK application to display Tor circuits and streams";
     mainProgram = "onioncircuits";
diff --git a/pkgs/tools/security/onlykey/onlykey.nix b/pkgs/tools/security/onlykey/onlykey.nix
index b154efb74712..b10d8718b7be 100644
--- a/pkgs/tools/security/onlykey/onlykey.nix
+++ b/pkgs/tools/security/onlykey/onlykey.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../../development/node-packages/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/pkgs/tools/security/opensc/default.nix b/pkgs/tools/security/opensc/default.nix
index b767261b4e0a..412053af2b4b 100644
--- a/pkgs/tools/security/opensc/default.nix
+++ b/pkgs/tools/security/opensc/default.nix
@@ -2,7 +2,7 @@
 , libiconv, pcsclite, libassuan, libXt
 , docbook_xsl, libxslt, docbook_xml_dtd_412
 , Carbon, PCSC, buildPackages
-, withApplePCSC ? stdenv.isDarwin
+, withApplePCSC ? stdenv.hostPlatform.isDarwin
 }:
 
 stdenv.mkDerivation rec {
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     zlib readline openssl libassuan
     libXt libxslt libiconv docbook_xml_dtd_412
   ]
-  ++ lib.optional stdenv.isDarwin Carbon
+  ++ lib.optional stdenv.hostPlatform.isDarwin Carbon
   ++ (if withApplePCSC then [ PCSC ] else [ pcsclite ]);
 
   env.NIX_CFLAGS_COMPILE = "-Wno-error";
diff --git a/pkgs/tools/security/pass/default.nix b/pkgs/tools/security/pass/default.nix
index 748ec2ccf3bf..fb8ef894bb18 100644
--- a/pkgs/tools/security/pass/default.nix
+++ b/pkgs/tools/security/pass/default.nix
@@ -3,7 +3,7 @@
 , which, openssh, procps, qrencode, makeWrapper, pass
 
 , xclip ? null, xdotool ? null, dmenu ? null
-, x11Support ? !stdenv.isDarwin , dmenuSupport ? (x11Support || waylandSupport)
+, x11Support ? !stdenv.hostPlatform.isDarwin , dmenuSupport ? (x11Support || waylandSupport)
 , waylandSupport ? false, wl-clipboard ? null
 , ydotool ? null, dmenu-wayland ? null
 
@@ -66,7 +66,7 @@ stdenv.mkDerivation rec {
   patches = [
     ./set-correct-program-name-for-sleep.patch
     ./extension-dir.patch
-  ] ++ lib.optional stdenv.isDarwin ./no-darwin-getopt.patch;
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin ./no-darwin-getopt.patch;
 
   nativeBuildInputs = [ makeWrapper ];
 
@@ -89,7 +89,7 @@ stdenv.mkDerivation rec {
     openssh
     procps
     qrencode
-  ] ++ lib.optional stdenv.isDarwin openssl
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin openssl
     ++ lib.optional x11Support xclip
     ++ lib.optional waylandSupport wl-clipboard
     ++ lib.optionals (waylandSupport && dmenuSupport) [ ydotool dmenu-wayland ]
@@ -124,7 +124,7 @@ stdenv.mkDerivation rec {
            -e 's@^GPGS=.*''$@GPG=${gnupg}/bin/gpg2@' \
            -e '/which gpg/ d' \
       tests/setup.sh
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     # 'pass edit' uses hdid, which is not available from the sandbox.
     rm -f tests/t0200-edit-tests.sh
     rm -f tests/t0010-generate-tests.sh
diff --git a/pkgs/tools/security/pass/extensions/audit/default.nix b/pkgs/tools/security/pass/extensions/audit/default.nix
index d3f196a20563..4aa96fe40909 100644
--- a/pkgs/tools/security/pass/extensions/audit/default.nix
+++ b/pkgs/tools/security/pass/extensions/audit/default.nix
@@ -44,7 +44,7 @@ python3.pkgs.buildPythonApplication rec {
   ];
 
   # Tests freeze on darwin with: pass-audit-1.1 (checkPhase): EOFError
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
   nativeCheckInputs = [
     python3.pkgs.green
     pass
diff --git a/pkgs/tools/security/pcsc-tools/default.nix b/pkgs/tools/security/pcsc-tools/default.nix
index c696fad309a3..39efa566553d 100644
--- a/pkgs/tools/security/pcsc-tools/default.nix
+++ b/pkgs/tools/security/pcsc-tools/default.nix
@@ -8,7 +8,7 @@
 , pkg-config
 , wrapGAppsHook3
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
-, dbusSupport ? stdenv.isLinux, dbus
+, dbusSupport ? stdenv.hostPlatform.isLinux, dbus
 , pcsclite
 , PCSC
 , wget
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
     dbus
   ] ++ [
     perlPackages.perl pcsclite
-  ] ++ lib.optional stdenv.isDarwin PCSC
+  ] ++ lib.optional stdenv.hostPlatform.isDarwin PCSC
     ++ lib.optional systemdSupport systemd;
 
   nativeBuildInputs = [
diff --git a/pkgs/tools/security/pcsclite/default.nix b/pkgs/tools/security/pcsclite/default.nix
index eedec6b239fd..955611a465c1 100644
--- a/pkgs/tools/security/pcsclite/default.nix
+++ b/pkgs/tools/security/pcsclite/default.nix
@@ -12,7 +12,7 @@
 , polkit
 , systemdLibs
 , udev
-, dbusSupport ? stdenv.isLinux
+, dbusSupport ? stdenv.hostPlatform.isLinux
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemdLibs
 , udevSupport ? dbusSupport
 , libusb1
@@ -96,7 +96,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs = [ python3 ]
     ++ lib.optionals systemdSupport [ systemdLibs ]
     ++ lib.optionals (!systemdSupport && udevSupport) [ udev ]
-    ++ lib.optionals stdenv.isDarwin [ Foundation IOKit ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation IOKit ]
     ++ lib.optionals dbusSupport [ dbus ]
     ++ lib.optionals polkitSupport [ polkit ]
     ++ lib.optionals (!udevSupport) [ libusb1 ];
diff --git a/pkgs/tools/security/quill/default.nix b/pkgs/tools/security/quill/default.nix
index 71ffc7af5c15..3aa2e6525b62 100644
--- a/pkgs/tools/security/quill/default.nix
+++ b/pkgs/tools/security/quill/default.nix
@@ -41,7 +41,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config protobuf ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security libiconv ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security libiconv ];
 
   meta = with lib; {
     homepage = "https://github.com/dfinity/quill";
diff --git a/pkgs/tools/security/rblake2sum/default.nix b/pkgs/tools/security/rblake2sum/default.nix
index 9052ffb68a96..92b4f574749a 100644
--- a/pkgs/tools/security/rblake2sum/default.nix
+++ b/pkgs/tools/security/rblake2sum/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-egwL3z7uB4AcRwPT0uPrenyh4FSxhbZKMdkPhRztMbs=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Recursive blake2 digest (hash) of a file-system path";
diff --git a/pkgs/tools/security/rblake3sum/default.nix b/pkgs/tools/security/rblake3sum/default.nix
index 62f290cdf320..af04b2014403 100644
--- a/pkgs/tools/security/rblake3sum/default.nix
+++ b/pkgs/tools/security/rblake3sum/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage {
 
   cargoHash = "sha256-SE/Zg/UEV/vhB/VDcn8Y70OUIoxbJBh6H2QgFMkWPc4=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Recursive blake3 digest (hash) of a file-system path";
diff --git a/pkgs/tools/security/rbw/default.nix b/pkgs/tools/security/rbw/default.nix
index c04ed415fb9e..597b4c0adad1 100644
--- a/pkgs/tools/security/rbw/default.nix
+++ b/pkgs/tools/security/rbw/default.nix
@@ -36,15 +36,15 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     installShellFiles
-  ] ++ lib.optionals stdenv.isLinux [ pkg-config ];
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
   buildInputs = [ bash ] # for git-credential-rbw
-  ++ lib.optionals stdenv.isDarwin [
+  ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.Security
     darwin.apple_sdk_11_0.frameworks.AppKit
   ];
 
-  preConfigure = lib.optionalString stdenv.isLinux ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isLinux ''
     export OPENSSL_INCLUDE_DIR="${openssl.dev}/include"
     export OPENSSL_LIB_DIR="${lib.getLib openssl}/lib"
   '';
diff --git a/pkgs/tools/security/ripasso/cursive.nix b/pkgs/tools/security/ripasso/cursive.nix
index b7cc5d969d08..fe216b91ff91 100644
--- a/pkgs/tools/security/ripasso/cursive.nix
+++ b/pkgs/tools/security/ripasso/cursive.nix
@@ -49,7 +49,7 @@ rustPlatform.buildRustPackage rec {
     gpgme
     xorg.libxcb
     nettle
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     AppKit
     Security
   ];
diff --git a/pkgs/tools/security/rucredstash/default.nix b/pkgs/tools/security/rucredstash/default.nix
index 972695ad565e..43166eb0bf8e 100644
--- a/pkgs/tools/security/rucredstash/default.nix
+++ b/pkgs/tools/security/rucredstash/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-TYobVjjzrK3gprZcYyY98EvdASkq4urB+WiLlbJbwmk=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   # Disable tests since it requires network access and relies on the
   # presence of certain AWS infrastructure
diff --git a/pkgs/tools/security/rustscan/default.nix b/pkgs/tools/security/rustscan/default.nix
index fc3ab5b2e013..6af9b974ac09 100644
--- a/pkgs/tools/security/rustscan/default.nix
+++ b/pkgs/tools/security/rustscan/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
     patchShebangs fixtures/.rustscan_scripts/*
   '';
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   nativeCheckInputs = [
     perl
diff --git a/pkgs/tools/security/saml2aws/default.nix b/pkgs/tools/security/saml2aws/default.nix
index 14e408275e34..1afba85be34e 100644
--- a/pkgs/tools/security/saml2aws/default.nix
+++ b/pkgs/tools/security/saml2aws/default.nix
@@ -21,7 +21,7 @@ buildGoModule rec {
   vendorHash = "sha256-gtl8T8wXnpLgDZc6qSgFKpA+XbcLNHf20ieBkyNdE+s=";
 
   nativeBuildInputs = [ installShellFiles ];
-  buildInputs = lib.optionals stdenv.isDarwin [ AppKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ AppKit ];
 
   subPackages = [
     "."
diff --git a/pkgs/tools/security/schleuder/default.nix b/pkgs/tools/security/schleuder/default.nix
index cce88366a372..8429cb0ea0d0 100644
--- a/pkgs/tools/security/schleuder/default.nix
+++ b/pkgs/tools/security/schleuder/default.nix
@@ -24,7 +24,7 @@ bundlerApp {
   };
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     description = "Schleuder is an encrypting mailing list manager with remailing-capabilities";
     longDescription = ''
       Schleuder is a group's email-gateway: subscribers can exchange
diff --git a/pkgs/tools/security/scrypt/default.nix b/pkgs/tools/security/scrypt/default.nix
index d1deaa0ec41d..d199ee37725e 100644
--- a/pkgs/tools/security/scrypt/default.nix
+++ b/pkgs/tools/security/scrypt/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
   checkTarget = "test";
-  nativeCheckInputs = lib.optionals stdenv.isLinux [ util-linux ];
+  nativeCheckInputs = lib.optionals stdenv.hostPlatform.isLinux [ util-linux ];
 
   meta = with lib; {
     description = "Encryption utility";
diff --git a/pkgs/tools/security/sequoia-chameleon-gnupg/default.nix b/pkgs/tools/security/sequoia-chameleon-gnupg/default.nix
index 96d15250e163..81091848a93c 100644
--- a/pkgs/tools/security/sequoia-chameleon-gnupg/default.nix
+++ b/pkgs/tools/security/sequoia-chameleon-gnupg/default.nix
@@ -31,7 +31,7 @@ rustPlatform.buildRustPackage rec {
     nettle
     openssl
     sqlite
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
     darwin.apple_sdk.frameworks.SystemConfiguration
   ];
diff --git a/pkgs/tools/security/sheesy-cli/default.nix b/pkgs/tools/security/sheesy-cli/default.nix
index 9df5da79e8a6..a2dda4493852 100644
--- a/pkgs/tools/security/sheesy-cli/default.nix
+++ b/pkgs/tools/security/sheesy-cli/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ libgpg-error gpgme gettext installShellFiles ];
 
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   buildFeatures = [ "vault" "extract" "completions" "substitute" "process" ];
 
diff --git a/pkgs/tools/security/snowcrash/default.nix b/pkgs/tools/security/snowcrash/default.nix
index 69d310afb9f9..b787b0da59b7 100644
--- a/pkgs/tools/security/snowcrash/default.nix
+++ b/pkgs/tools/security/snowcrash/default.nix
@@ -19,7 +19,7 @@ buildGoModule rec {
 
   subPackages = [ "." ];
 
-  postFixup = lib.optionals (!stdenv.isDarwin) ''
+  postFixup = lib.optionals (!stdenv.hostPlatform.isDarwin) ''
     mv $out/bin/SNOWCRASH $out/bin/${pname}
   '';
 
diff --git a/pkgs/tools/security/softhsm/default.nix b/pkgs/tools/security/softhsm/default.nix
index e4c428b90b9a..d755e131d8f0 100644
--- a/pkgs/tools/security/softhsm/default.nix
+++ b/pkgs/tools/security/softhsm/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   ];
 
   propagatedBuildInputs =
-    lib.optionals stdenv.isDarwin [ libobjc Security ];
+    lib.optionals stdenv.hostPlatform.isDarwin [ libobjc Security ];
 
   buildInputs = [ botan2 sqlite ];
 
diff --git a/pkgs/tools/security/solo2-cli/default.nix b/pkgs/tools/security/solo2-cli/default.nix
index a241e8780101..387bf00e37bf 100644
--- a/pkgs/tools/security/solo2-cli/default.nix
+++ b/pkgs/tools/security/solo2-cli/default.nix
@@ -28,8 +28,8 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ installShellFiles pkg-config ];
 
   buildInputs = [ ]
-    ++ lib.optionals stdenv.isLinux [ pcsclite udev ]
-    ++ lib.optionals stdenv.isDarwin [ PCSC IOKit CoreFoundation AppKit ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ pcsclite udev ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ PCSC IOKit CoreFoundation AppKit ];
 
   postInstall = ''
     install -D 70-solo2.rules $out/lib/udev/rules.d/70-solo2.rules
diff --git a/pkgs/tools/security/spectre-cli/default.nix b/pkgs/tools/security/spectre-cli/default.nix
index 923046cdad4a..ba63b823e739 100644
--- a/pkgs/tools/security/spectre-cli/default.nix
+++ b/pkgs/tools/security/spectre-cli/default.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
 
   # Some tests are expected to fail on ARM64
   # See: https://gitlab.com/spectre.app/cli/-/issues/27#note_962950844
-  doCheck = !(stdenv.isLinux && stdenv.isAarch64);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64);
 
   checkPhase = ''
     mv ../spectre-cli-tests ../spectre_tests.xml ./
diff --git a/pkgs/tools/security/ssdeep/default.nix b/pkgs/tools/security/ssdeep/default.nix
index 68b8afdf6712..b3ec01ebdbbf 100644
--- a/pkgs/tools/security/ssdeep/default.nix
+++ b/pkgs/tools/security/ssdeep/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$out"/bin/*
   '';
 
diff --git a/pkgs/tools/security/ssh-mitm/default.nix b/pkgs/tools/security/ssh-mitm/default.nix
index 6694a9edaae2..4c59595ec936 100644
--- a/pkgs/tools/security/ssh-mitm/default.nix
+++ b/pkgs/tools/security/ssh-mitm/default.nix
@@ -63,7 +63,7 @@ buildPythonApplication rec {
     setuptools
     sshpubkeys
     wrapt
-  ] ++ lib.optionals stdenv.isDarwin [ setuptools ];
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ setuptools ];
   # fix for darwin users
 
   nativeBuildInputs = [ installShellFiles ];
diff --git a/pkgs/tools/security/sshuttle/default.nix b/pkgs/tools/security/sshuttle/default.nix
index 2090c4d396bd..e52453e8006d 100644
--- a/pkgs/tools/security/sshuttle/default.nix
+++ b/pkgs/tools/security/sshuttle/default.nix
@@ -42,7 +42,7 @@ python3Packages.buildPythonApplication rec {
     installManPage docs/_build/man/*
 
     wrapProgram $out/bin/sshuttle \
-      --prefix PATH : "${lib.makeBinPath ([ coreutils openssh procps ] ++ lib.optionals stdenv.isLinux [ iptables nettools ])}" \
+      --prefix PATH : "${lib.makeBinPath ([ coreutils openssh procps ] ++ lib.optionals stdenv.hostPlatform.isLinux [ iptables nettools ])}" \
   '';
 
   meta = with lib; {
diff --git a/pkgs/tools/security/step-ca/default.nix b/pkgs/tools/security/step-ca/default.nix
index 549cfa6a5224..f37c05f93fbb 100644
--- a/pkgs/tools/security/step-ca/default.nix
+++ b/pkgs/tools/security/step-ca/default.nix
@@ -32,8 +32,8 @@ buildGoModule rec {
   nativeBuildInputs = lib.optionals hsmSupport [ pkg-config ];
 
   buildInputs =
-    lib.optionals (hsmSupport && stdenv.isLinux) [ pcsclite ]
-    ++ lib.optionals (hsmSupport && stdenv.isDarwin) [ PCSC ];
+    lib.optionals (hsmSupport && stdenv.hostPlatform.isLinux) [ pcsclite ]
+    ++ lib.optionals (hsmSupport && stdenv.hostPlatform.isDarwin) [ PCSC ];
 
   postPatch = ''
     substituteInPlace systemd/step-ca.service --replace "/bin/kill" "${coreutils}/bin/kill"
diff --git a/pkgs/tools/security/step-kms-plugin/default.nix b/pkgs/tools/security/step-kms-plugin/default.nix
index 3eaf3a9c9cb4..ba35b7c11087 100644
--- a/pkgs/tools/security/step-kms-plugin/default.nix
+++ b/pkgs/tools/security/step-kms-plugin/default.nix
@@ -48,6 +48,6 @@ buildGoModule rec {
     maintainers = with maintainers; [ qbit ];
     mainProgram = "step-kms-plugin";
     # can't find pcsclite header files
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/security/swtpm/default.nix b/pkgs/tools/security/swtpm/default.nix
index b39c43a8e1b6..6b1bdb4c03ab 100644
--- a/pkgs/tools/security/swtpm/default.nix
+++ b/pkgs/tools/security/swtpm/default.nix
@@ -41,14 +41,14 @@ stdenv.mkDerivation (finalAttrs: {
     openssl libtasn1
     glib json-glib
     gnutls
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     fuse
     libseccomp
   ];
 
   configureFlags = [
     "--localstatedir=/var"
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     "--with-cuse"
   ];
 
diff --git a/pkgs/tools/security/tcpcrypt/default.nix b/pkgs/tools/security/tcpcrypt/default.nix
index 8b00431b6cbe..1d34fdd4e710 100644
--- a/pkgs/tools/security/tcpcrypt/default.nix
+++ b/pkgs/tools/security/tcpcrypt/default.nix
@@ -19,12 +19,12 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "dev" "out" ];
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ openssl libpcap ]
-    ++ lib.optionals stdenv.isLinux [ libcap libnfnetlink libnetfilter_conntrack libnetfilter_queue ];
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap libnfnetlink libnetfilter_conntrack libnetfilter_queue ];
 
   enableParallelBuilding = true;
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
     homepage = "http://tcpcrypt.org/";
     description = "Fast TCP encryption";
     platforms = platforms.all;
diff --git a/pkgs/tools/security/thc-hydra/default.nix b/pkgs/tools/security/thc-hydra/default.nix
index aa0e9fd8fb43..412691d2b940 100644
--- a/pkgs/tools/security/thc-hydra/default.nix
+++ b/pkgs/tools/security/thc-hydra/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation rec {
       --replace-fail "-lcurses" "-lncurses"
   '';
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-Wno-undef-prefix";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-Wno-undef-prefix";
 
   nativeBuildInputs = lib.optionals withGUI [ pkg-config makeWrapper ];
 
diff --git a/pkgs/tools/security/tor/default.nix b/pkgs/tools/security/tor/default.nix
index 30eb8360fe39..164526a8e133 100644
--- a/pkgs/tools/security/tor/default.nix
+++ b/pkgs/tools/security/tor/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ libevent openssl zlib xz zstd scrypt ] ++
-    lib.optionals stdenv.isLinux [ libseccomp systemd libcap ];
+    lib.optionals stdenv.hostPlatform.isLinux [ libseccomp systemd libcap ];
 
   patches = [ ./disable-monotonic-timer-tests.patch ];
 
@@ -55,7 +55,7 @@ stdenv.mkDerivation rec {
     lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [ "--disable-tool-name-check" ]
     ++
     # sandbox is broken on aarch64-linux https://gitlab.torproject.org/tpo/core/tor/-/issues/40599
-    lib.optionals (stdenv.isLinux && stdenv.isAarch64) [ "--disable-seccomp" ]
+    lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [ "--disable-seccomp" ]
   ;
 
   NIX_CFLAGS_LINK = lib.optionalString stdenv.cc.isGNU "-lgcc_s";
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
 
   # disable tests on linux aarch32
   # https://gitlab.torproject.org/tpo/core/tor/-/issues/40912
-  doCheck = !(stdenv.isLinux && stdenv.isAarch32);
+  doCheck = !(stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch32);
 
   postInstall = ''
     mkdir -p $geoip/share/tor
diff --git a/pkgs/tools/security/tor/torsocks.nix b/pkgs/tools/security/tor/torsocks.nix
index 0ad36688bd6b..8b09bfc3bf9b 100644
--- a/pkgs/tools/security/tor/torsocks.nix
+++ b/pkgs/tools/security/tor/torsocks.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     sed -i \
       -e 's,\(local app_path\)=`which $1`,\1=`type -P $1`,' \
       src/bin/torsocks.in
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     sed -i \
       -e 's,\(local getcap\)=.*,\1=${libcap}/bin/getcap,' \
       src/bin/torsocks.in
diff --git a/pkgs/tools/security/vault/default.nix b/pkgs/tools/security/vault/default.nix
index 32ad1196edca..007edb9c6abe 100644
--- a/pkgs/tools/security/vault/default.nix
+++ b/pkgs/tools/security/vault/default.nix
@@ -35,7 +35,7 @@ buildGoModule rec {
   postInstall = ''
     echo "complete -C $out/bin/vault vault" > vault.bash
     installShellCompletion vault.bash
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     wrapProgram $out/bin/vault \
       --prefix PATH ${lib.makeBinPath [ gawk glibc ]}
   '';
diff --git a/pkgs/tools/security/vault/vault-bin.nix b/pkgs/tools/security/vault/vault-bin.nix
index 7a829e1ad271..9cfdc187eaee 100644
--- a/pkgs/tools/security/vault/vault-bin.nix
+++ b/pkgs/tools/security/vault/vault-bin.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
 
   dontConfigure = true;
   dontBuild = true;
-  dontStrip = stdenv.isDarwin;
+  dontStrip = stdenv.hostPlatform.isDarwin;
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/tools/security/vaultwarden/default.nix b/pkgs/tools/security/vaultwarden/default.nix
index 137f9e6c9564..f28bc52fdbc7 100644
--- a/pkgs/tools/security/vaultwarden/default.nix
+++ b/pkgs/tools/security/vaultwarden/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ libiconv Security CoreServices SystemConfiguration ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security CoreServices SystemConfiguration ]
     ++ lib.optional (dbBackend == "mysql") libmysqlclient
     ++ lib.optional (dbBackend == "postgresql") postgresql;
 
diff --git a/pkgs/tools/security/yubihsm-shell/default.nix b/pkgs/tools/security/yubihsm-shell/default.nix
index 8567798ea82c..90af2f22068a 100644
--- a/pkgs/tools/security/yubihsm-shell/default.nix
+++ b/pkgs/tools/security/yubihsm-shell/default.nix
@@ -47,18 +47,18 @@ stdenv.mkDerivation rec {
     libedit
     curl
     openssl
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     pcsclite.dev
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.PCSC
     libiconv
   ];
 
-  preBuild = lib.optionalString stdenv.isLinux ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isLinux ''
     NIX_CFLAGS_COMPILE="$(pkg-config --cflags libpcsclite) $NIX_CFLAGS_COMPILE"
   '';
 
-  cmakeFlags = lib.optionals stdenv.isDarwin [
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [
     "-DDISABLE_LTO=ON"
   ];
 
diff --git a/pkgs/tools/security/yubikey-agent/default.nix b/pkgs/tools/security/yubikey-agent/default.nix
index f43e83e575e7..f2e290ade6db 100644
--- a/pkgs/tools/security/yubikey-agent/default.nix
+++ b/pkgs/tools/security/yubikey-agent/default.nix
@@ -12,12 +12,12 @@ buildGoModule rec {
   };
 
   buildInputs =
-    lib.optional stdenv.isLinux (lib.getDev pcsclite)
-    ++ lib.optional stdenv.isDarwin (darwin.apple_sdk.frameworks.PCSC);
+    lib.optional stdenv.hostPlatform.isLinux (lib.getDev pcsclite)
+    ++ lib.optional stdenv.hostPlatform.isDarwin (darwin.apple_sdk.frameworks.PCSC);
 
-  nativeBuildInputs = lib.optionals stdenv.isLinux [ pkg-config ];
+  nativeBuildInputs = lib.optionals stdenv.hostPlatform.isLinux [ pkg-config ];
 
-  postPatch = lib.optionalString stdenv.isLinux ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace main.go --replace 'notify-send' ${libnotify}/bin/notify-send
   '';
 
@@ -29,7 +29,7 @@ buildGoModule rec {
 
   ldflags = [ "-s" "-w" "-X main.Version=${version}" ];
 
-  postInstall = lib.optionalString stdenv.isLinux ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isLinux ''
     mkdir -p $out/lib/systemd/user
     substitute contrib/systemd/user/yubikey-agent.service $out/lib/systemd/user/yubikey-agent.service \
       --replace 'ExecStart=yubikey-agent' "ExecStart=$out/bin/yubikey-agent"
diff --git a/pkgs/tools/security/zmap/default.nix b/pkgs/tools/security/zmap/default.nix
index 1749c9ef6d7f..b7a9986434eb 100644
--- a/pkgs/tools/security/zmap/default.nix
+++ b/pkgs/tools/security/zmap/default.nix
@@ -26,6 +26,6 @@ stdenv.mkDerivation rec {
     description = "Fast single packet network scanner designed for Internet-wide network surveys";
     maintainers = with maintainers; [ ma27 ];
     platforms = platforms.unix;
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/system/bfs/default.nix b/pkgs/tools/system/bfs/default.nix
index 464c5f67ed57..e950cd957ea1 100644
--- a/pkgs/tools/system/bfs/default.nix
+++ b/pkgs/tools/system/bfs/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     hash = "sha256-WIJyCpnlD6/c7PG+ZPmUT8qfPelRY9Od1Dk9Ro1y1yY=";
   };
 
-  buildInputs = [ oniguruma ] ++ lib.optionals stdenv.isLinux [ libcap acl liburing ];
+  buildInputs = [ oniguruma ] ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap acl liburing ];
 
   configureFlags = [ "--enable-release" ];
   makeFlags = [ "PREFIX=$(out)" ];
diff --git a/pkgs/tools/system/btop/default.nix b/pkgs/tools/system/btop/default.nix
index 66745ccf86a8..0f67b4111aa6 100644
--- a/pkgs/tools/system/btop/default.nix
+++ b/pkgs/tools/system/btop/default.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
     autoAddDriverRunpath
   ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk_11_0.frameworks.CoreFoundation
     darwin.apple_sdk_11_0.frameworks.IOKit
   ];
diff --git a/pkgs/tools/system/clinfo/default.nix b/pkgs/tools/system/clinfo/default.nix
index 50e72498bf64..465bba682b0e 100644
--- a/pkgs/tools/system/clinfo/default.nix
+++ b/pkgs/tools/system/clinfo/default.nix
@@ -11,10 +11,10 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-1jZP4SnLIHh3vQJLBp+j/eQ1c8XBGFR2hjYxflhpWAU=";
   };
 
-  buildInputs = lib.optionals (!stdenv.isDarwin) [
+  buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [
     ocl-icd
     opencl-headers
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     OpenCL
   ];
 
diff --git a/pkgs/tools/system/collectd/default.nix b/pkgs/tools/system/collectd/default.nix
index bbcc9f704bc4..b75cdb19de16 100644
--- a/pkgs/tools/system/collectd/default.nix
+++ b/pkgs/tools/system/collectd/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config autoreconfHook ];
   buildInputs = [
     libtool
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.ApplicationServices
   ] ++ plugins.buildInputs;
 
diff --git a/pkgs/tools/system/collectd/plugins.nix b/pkgs/tools/system/collectd/plugins.nix
index 9ca18b06203d..7202ec795e8b 100644
--- a/pkgs/tools/system/collectd/plugins.nix
+++ b/pkgs/tools/system/collectd/plugins.nix
@@ -51,10 +51,10 @@ let
   plugins = {
     amqp.buildInputs = [
       yajl
-    ] ++ lib.optionals stdenv.isLinux [ rabbitmq-c ];
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [ rabbitmq-c ];
     apache.buildInputs = [ curl ];
     ascent.buildInputs = [ curl libxml2 ];
-    battery.buildInputs = lib.optionals stdenv.isDarwin [
+    battery.buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
       IOKit
     ];
     bind.buildInputs = [ curl libxml2 ];
@@ -63,30 +63,30 @@ let
     curl_json.buildInputs = [ curl yajl ];
     curl_xml.buildInputs = [ curl libxml2 ];
     dbi.buildInputs = [ libdbi ];
-    disk.buildInputs = lib.optionals stdenv.isLinux [
+    disk.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [
       udev
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       IOKit
     ];
     dns.buildInputs = [ libpcap ];
     ipmi.buildInputs = [ openipmi ];
     iptables.buildInputs = [
       libpcap
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       iptables libmnl
     ];
     java.buildInputs = [ jdk libgcrypt libxml2 ];
     log_logstash.buildInputs = [ yajl ];
     lua.buildInputs = [ lua ];
     memcachec.buildInputs = [ libmemcached cyrus_sasl ];
-    modbus.buildInputs = lib.optionals stdenv.isLinux [ libmodbus ];
+    modbus.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libmodbus ];
     mqtt.buildInputs = [ mosquitto ];
     mysql.buildInputs = lib.optionals (libmysqlclient != null) [
       libmysqlclient
     ];
     netlink.buildInputs = [
       libpcap
-    ] ++ lib.optionals stdenv.isLinux [
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [
       libmnl
     ];
     network.buildInputs = [ libgcrypt ];
@@ -104,15 +104,15 @@ let
     redis.buildInputs = [ hiredis ];
     rrdcached.buildInputs = [ rrdtool libxml2 ];
     rrdtool.buildInputs = [ rrdtool libxml2 ];
-    sensors.buildInputs = lib.optionals stdenv.isLinux [ lm_sensors ];
-    sigrok.buildInputs = lib.optionals stdenv.isLinux [ libsigrok udev ];
-    smart.buildInputs = lib.optionals stdenv.isLinux [ libatasmart udev ];
-    snmp.buildInputs = lib.optionals stdenv.isLinux [ net-snmp ];
-    snmp_agent.buildInputs = lib.optionals stdenv.isLinux [ net-snmp ];
+    sensors.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ lm_sensors ];
+    sigrok.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libsigrok udev ];
+    smart.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ libatasmart udev ];
+    snmp.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ net-snmp ];
+    snmp_agent.buildInputs = lib.optionals stdenv.hostPlatform.isLinux [ net-snmp ];
     varnish.buildInputs = [ curl varnish ];
     virt.buildInputs = [
       libvirt libxml2 yajl
-    ] ++ lib.optionals stdenv.isLinux [ lvm2 udev ];
+    ] ++ lib.optionals stdenv.hostPlatform.isLinux [ lvm2 udev ];
     write_http.buildInputs = [ curl yajl ];
     write_kafka.buildInputs = [ yajl rdkafka ];
     write_log.buildInputs = [ yajl ];
diff --git a/pkgs/tools/system/fakeroot/default.nix b/pkgs/tools/system/fakeroot/default.nix
index c386536e1f17..518d54898d9b 100644
--- a/pkgs/tools/system/fakeroot/default.nix
+++ b/pkgs/tools/system/fakeroot/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-j1qSMPNCtAxClqYqWkRNQmtxkitYi7g/9KtQ5XqcX3w=";
   };
 
-  patches = lib.optionals stdenv.isLinux [
+  patches = lib.optionals stdenv.hostPlatform.isLinux [
     ./einval.patch
 
     # patches needed for musl libc, borrowed from alpine packaging.
@@ -48,7 +48,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   nativeBuildInputs = [ autoreconfHook po4a ];
-  buildInputs = lib.optional (!stdenv.isDarwin) libcap;
+  buildInputs = lib.optional (!stdenv.hostPlatform.isDarwin) libcap;
 
   postUnpack = ''
     sed -i \
diff --git a/pkgs/tools/system/fio/default.nix b/pkgs/tools/system/fio/default.nix
index d73d8dda7a77..11c1c1d945de 100644
--- a/pkgs/tools/system/fio/default.nix
+++ b/pkgs/tools/system/fio/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [ python3 zlib ]
-    ++ lib.optional (!stdenv.isDarwin) libaio;
+    ++ lib.optional (!stdenv.hostPlatform.isDarwin) libaio;
 
   # ./configure does not support autoconf-style --build=/--host=.
   # We use $CC instead.
diff --git a/pkgs/tools/system/foremost/default.nix b/pkgs/tools/system/foremost/default.nix
index a1a09826c537..bdf846e029d3 100644
--- a/pkgs/tools/system/foremost/default.nix
+++ b/pkgs/tools/system/foremost/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   #   ld: api.o:(.bss+0xbdba0): multiple definition of `wildcard'; main.o:(.bss+0xbd760): first defined here
   env.NIX_CFLAGS_COMPILE = "-fcommon";
 
-  makeFlags = [ "PREFIX=$(out)" ] ++ lib.optionals stdenv.isDarwin [ "mac" ];
+  makeFlags = [ "PREFIX=$(out)" ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ "mac" ];
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/tools/system/gdu/default.nix b/pkgs/tools/system/gdu/default.nix
index dfb1179a0897..4ba04921484f 100644
--- a/pkgs/tools/system/gdu/default.nix
+++ b/pkgs/tools/system/gdu/default.nix
@@ -38,7 +38,7 @@ buildGoModule rec {
     installManPage gdu.1
   '';
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkFlags = [
     # https://github.com/dundee/gdu/issues/371
diff --git a/pkgs/tools/system/gotop/default.nix b/pkgs/tools/system/gotop/default.nix
index 5305b127a1c5..b2279e0f13d2 100644
--- a/pkgs/tools/system/gotop/default.nix
+++ b/pkgs/tools/system/gotop/default.nix
@@ -32,7 +32,7 @@ buildGoModule rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ IOKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   preCheck = ''
     export HOME=$(mktemp -d)
diff --git a/pkgs/tools/system/gptfdisk/default.nix b/pkgs/tools/system/gptfdisk/default.nix
index 2718be70c71f..798d1b223e5c 100644
--- a/pkgs/tools/system/gptfdisk/default.nix
+++ b/pkgs/tools/system/gptfdisk/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     patchShebangs gdisk_test.sh
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile.mac --replace \
       "-mmacosx-version-min=10.4" "-mmacosx-version-min=10.6"
     substituteInPlace Makefile.mac --replace \
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
       "/usr/local/Cellar/ncurses/6.2/lib/libncurses.dylib" "${ncurses.out}/lib/libncurses.dylib"
   '';
 
-  buildPhase = lib.optionalString stdenv.isDarwin "make -f Makefile.mac";
+  buildPhase = lib.optionalString stdenv.hostPlatform.isDarwin "make -f Makefile.mac";
   buildInputs = [ libuuid popt icu ncurses ];
 
   installPhase = ''
diff --git a/pkgs/tools/system/gptman/default.nix b/pkgs/tools/system/gptman/default.nix
index cd9fd4361563..484ab05a85f2 100644
--- a/pkgs/tools/system/gptman/default.nix
+++ b/pkgs/tools/system/gptman/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-P+qez0oVsHBiaBYban2o8MRvF8ElLf5zb+p+tYunWWA=";
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   buildFeatures = [ "cli" ];
 
diff --git a/pkgs/tools/system/htop/default.nix b/pkgs/tools/system/htop/default.nix
index 55e9b5e9365c..c0a689c4c621 100644
--- a/pkgs/tools/system/htop/default.nix
+++ b/pkgs/tools/system/htop/default.nix
@@ -3,11 +3,11 @@
 , IOKit
 , libcap
 , libnl
-, sensorsSupport ? stdenv.isLinux, lm_sensors
+, sensorsSupport ? stdenv.hostPlatform.isLinux, lm_sensors
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd, systemd
 }:
 
-assert systemdSupport -> stdenv.isLinux;
+assert systemdSupport -> stdenv.hostPlatform.isLinux;
 
 stdenv.mkDerivation rec {
   pname = "htop";
@@ -21,18 +21,18 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ autoreconfHook ]
-    ++ lib.optional stdenv.isLinux pkg-config
+    ++ lib.optional stdenv.hostPlatform.isLinux pkg-config
   ;
 
   buildInputs = [ ncurses ]
-    ++ lib.optional stdenv.isDarwin IOKit
-    ++ lib.optionals stdenv.isLinux [ libcap libnl ]
+    ++ lib.optional stdenv.hostPlatform.isDarwin IOKit
+    ++ lib.optionals stdenv.hostPlatform.isLinux [ libcap libnl ]
     ++ lib.optional sensorsSupport lm_sensors
     ++ lib.optional systemdSupport systemd
   ;
 
   configureFlags = [ "--enable-unicode" "--sysconfdir=/etc" ]
-    ++ lib.optionals stdenv.isLinux [
+    ++ lib.optionals stdenv.hostPlatform.isLinux [
       "--enable-affinity"
       "--enable-capabilities"
       "--enable-delayacct"
diff --git a/pkgs/tools/system/java-service-wrapper/default.nix b/pkgs/tools/system/java-service-wrapper/default.nix
index 3bbcd917fb6b..bd0dba9a024f 100644
--- a/pkgs/tools/system/java-service-wrapper/default.nix
+++ b/pkgs/tools/system/java-service-wrapper/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     export JAVA_TOOL_OPTIONS=-Djava.home=$JAVA_HOME
     export CLASSPATH=${jdk}/lib/openjdk/lib/tools.jar
 
-    ant -f build.xml -Dbits=${if stdenv.isi686 then "32" else "64"}
+    ant -f build.xml -Dbits=${if stdenv.hostPlatform.isi686 then "32" else "64"}
 
     runHook postBuild
   '';
diff --git a/pkgs/tools/system/kanata/default.nix b/pkgs/tools/system/kanata/default.nix
index 682158af76ca..b55d5227b0d1 100644
--- a/pkgs/tools/system/kanata/default.nix
+++ b/pkgs/tools/system/kanata/default.nix
@@ -43,7 +43,7 @@ rustPlatform.buildRustPackage rec {
     '';
   };
 
-  buildInputs = lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ darwin.apple_sdk.frameworks.IOKit ];
 
   buildFeatures = lib.optional withCmd "cmd";
 
@@ -62,6 +62,6 @@ rustPlatform.buildRustPackage rec {
     maintainers = with maintainers; [ bmanuel linj ];
     platforms = platforms.unix;
     mainProgram = "kanata";
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/system/netdata/default.nix b/pkgs/tools/system/netdata/default.nix
index c7c7554914c7..b8746229d81e 100644
--- a/pkgs/tools/system/netdata/default.nix
+++ b/pkgs/tools/system/netdata/default.nix
@@ -42,15 +42,15 @@
   withDBengine ? true,
   withDebug ? false,
   withEbpf ? false,
-  withIpmi ? (stdenv.isLinux),
-  withNetfilter ? (stdenv.isLinux),
-  withNetworkViewer ? (stdenv.isLinux),
+  withIpmi ? (stdenv.hostPlatform.isLinux),
+  withNetfilter ? (stdenv.hostPlatform.isLinux),
+  withNetworkViewer ? (stdenv.hostPlatform.isLinux),
   withSsl ? true,
-  withSystemdJournal ? (stdenv.isLinux),
+  withSystemdJournal ? (stdenv.hostPlatform.isLinux),
   zlib,
 }:
 let
-  stdenv' = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+  stdenv' = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
 in
 stdenv'.mkDerivation (finalAttrs: {
   version = "1.47.1";
@@ -96,7 +96,7 @@ stdenv'.mkDerivation (finalAttrs: {
       zlib
       libyaml
     ]
-    ++ lib.optionals stdenv.isDarwin (
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (
       with darwin.apple_sdk.frameworks;
       [
         CoreFoundation
@@ -104,7 +104,7 @@ stdenv'.mkDerivation (finalAttrs: {
         libossp_uuid
       ]
     )
-    ++ lib.optionals (stdenv.isLinux) [
+    ++ lib.optionals (stdenv.hostPlatform.isLinux) [
       libcap
       libuuid
       lm_sensors
@@ -153,7 +153,7 @@ stdenv'.mkDerivation (finalAttrs: {
       # Relocate one folder above.
       mv $out/usr/* $out/
     ''
-    + lib.optionalString (stdenv.isLinux) ''
+    + lib.optionalString (stdenv.hostPlatform.isLinux) ''
       # rename this plugin so netdata will look for setuid wrapper
       mv $out/libexec/netdata/plugins.d/apps.plugin \
          $out/libexec/netdata/plugins.d/apps.plugin.org
diff --git a/pkgs/tools/system/nsc/default.nix b/pkgs/tools/system/nsc/default.nix
index f9aeba937a5f..88dafe7f4f3e 100644
--- a/pkgs/tools/system/nsc/default.nix
+++ b/pkgs/tools/system/nsc/default.nix
@@ -50,7 +50,7 @@ buildGoModule rec {
   # Then the `-` are removed from the path unintentionally and the test fails.
   # This should be fixed upstream to avoid mangling the path when
   # removing the table decorations from the command output.
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   meta = {
     description = "Tool for creating NATS account and user access configurations";
diff --git a/pkgs/tools/system/plan9port/default.nix b/pkgs/tools/system/plan9port/default.nix
index 56e191232452..6d1e778da376 100644
--- a/pkgs/tools/system/plan9port/default.nix
+++ b/pkgs/tools/system/plan9port/default.nix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ ed ];
-  buildInputs = [ perl which ] ++ (if !stdenv.isDarwin then [
+  buildInputs = [ perl which ] ++ (if !stdenv.hostPlatform.isDarwin then [
     fontconfig freetype # fontsrv uses these
     libX11 libXext libXt xorgproto
   ] else [
@@ -49,7 +49,7 @@ stdenv.mkDerivation rec {
     CC9='$(command -v $CC)'
     CFLAGS='$NIX_CFLAGS_COMPILE'
     LDFLAGS='$(for f in $NIX_LDFLAGS; do echo "-Wl,$f"; done | xargs echo)'
-    ${lib.optionalString (!stdenv.isDarwin) "X11='${libXt.dev}/include'"}
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "X11='${libXt.dev}/include'"}
     EOF
 
     # make '9' available in the path so there's some way to find out $PLAN9
diff --git a/pkgs/tools/system/rowhammer-test/default.nix b/pkgs/tools/system/rowhammer-test/default.nix
index c19f7a54f0dd..0287a3d3a5fb 100644
--- a/pkgs/tools/system/rowhammer-test/default.nix
+++ b/pkgs/tools/system/rowhammer-test/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
     sha256 = "1fbfcnm5gjish47wdvikcsgzlb5vnlfqlzzm6mwiw2j5qkq0914i";
   };
 
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-Wno-error=format";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isi686 "-Wno-error=format";
 
   buildPhase = "sh -e make.sh";
 
diff --git a/pkgs/tools/system/runit/default.nix b/pkgs/tools/system/runit/default.nix
index 2553c07cd6b5..10333d0f6035 100644
--- a/pkgs/tools/system/runit/default.nix
+++ b/pkgs/tools/system/runit/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   doCheck = true;
 
   buildInputs = lib.optionals static [ stdenv.cc.libc stdenv.cc.libc.static ] ++
-    lib.optional stdenv.isDarwin darwin.apple_sdk.libs.utmp;
+    lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.libs.utmp;
 
   postPatch = ''
     sed -i "s,\(#define RUNIT\) .*,\1 \"$out/bin/runit\"," src/runit.h
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
 
     # Both of these are originally hard-coded to gcc
     echo ${stdenv.cc.targetPrefix}cc > conf-cc
-    echo ${stdenv.cc.targetPrefix}cc ${lib.optionalString stdenv.isDarwin "-Xlinker -x "}> conf-ld
+    echo ${stdenv.cc.targetPrefix}cc ${lib.optionalString stdenv.hostPlatform.isDarwin "-Xlinker -x "}> conf-ld
   '';
 
   installPhase = ''
diff --git a/pkgs/tools/system/s-tui/default.nix b/pkgs/tools/system/s-tui/default.nix
index 15bedadccef0..c153b3033f86 100644
--- a/pkgs/tools/system/s-tui/default.nix
+++ b/pkgs/tools/system/s-tui/default.nix
@@ -31,7 +31,7 @@ python3Packages.buildPythonPackage rec {
     description = "Stress-Terminal UI monitoring tool";
     license = licenses.gpl2Plus;
     maintainers = [ ];
-    broken = stdenv.isDarwin; # https://github.com/amanusk/s-tui/issues/49
+    broken = stdenv.hostPlatform.isDarwin; # https://github.com/amanusk/s-tui/issues/49
     mainProgram = "s-tui";
   };
 }
diff --git a/pkgs/tools/system/smartmontools/default.nix b/pkgs/tools/system/smartmontools/default.nix
index 50765fa2e170..b8c594dde470 100644
--- a/pkgs/tools/system/smartmontools/default.nix
+++ b/pkgs/tools/system/smartmontools/default.nix
@@ -54,8 +54,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs =
-    lib.optionals stdenv.isLinux [ systemdLibs ]
-    ++ lib.optionals stdenv.isDarwin [
+    lib.optionals stdenv.hostPlatform.isLinux [ systemdLibs ]
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [
       IOKit
       ApplicationServices
     ];
diff --git a/pkgs/tools/system/stress-ng/default.nix b/pkgs/tools/system/stress-ng/default.nix
index ebd209d2c8fd..c189606cd007 100644
--- a/pkgs/tools/system/stress-ng/default.nix
+++ b/pkgs/tools/system/stress-ng/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   # install phase without checking the dependencies. This will prevent
   # triggering the rebuild. Why this only happens on i686 remains a
   # mystery, though. :-(
-  enableParallelBuilding = (!stdenv.isi686);
+  enableParallelBuilding = (!stdenv.hostPlatform.isi686);
 
   meta = with lib; {
     description = "Stress test a computer system";
diff --git a/pkgs/tools/system/testdisk/default.nix b/pkgs/tools/system/testdisk/default.nix
index e4d24802a54f..8761576d19b0 100644
--- a/pkgs/tools/system/testdisk/default.nix
+++ b/pkgs/tools/system/testdisk/default.nix
@@ -7,8 +7,8 @@
 , libjpeg
 , zlib
 , libewf
-, enableNtfs ? !stdenv.isDarwin, ntfs3g ? null
-, enableExtFs ? !stdenv.isDarwin, e2fsprogs ? null
+, enableNtfs ? !stdenv.hostPlatform.isDarwin, ntfs3g ? null
+, enableExtFs ? !stdenv.hostPlatform.isDarwin, e2fsprogs ? null
 , enableQt ? false, qtbase ? null, qttools ? null, qwt ? null
 }:
 
diff --git a/pkgs/tools/system/tree/default.nix b/pkgs/tools/system/tree/default.nix
index 069723b7bdb3..fbd0f08d110a 100644
--- a/pkgs/tools/system/tree/default.nix
+++ b/pkgs/tools/system/tree/default.nix
@@ -4,14 +4,14 @@ let
   # These settings are found in the Makefile, but there seems to be no
   # way to select one or the other setting other than editing the file
   # manually, so we have to duplicate the know how here.
-  systemFlags = lib.optionalString stdenv.isDarwin ''
+  systemFlags = lib.optionalString stdenv.hostPlatform.isDarwin ''
     CFLAGS="-O2 -Wall -fomit-frame-pointer -no-cpp-precomp"
     LDFLAGS=
-  '' + lib.optionalString stdenv.isCygwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isCygwin ''
     CFLAGS="-O2 -Wall -fomit-frame-pointer"
     LDFLAGS=-s
     TREE_DEST=tree.exe
-  '' + lib.optionalString (stdenv.isFreeBSD || stdenv.isOpenBSD) ''
+  '' + lib.optionalString (stdenv.hostPlatform.isFreeBSD || stdenv.hostPlatform.isOpenBSD) ''
     CFLAGS="-O2 -Wall -fomit-frame-pointer"
     LDFLAGS=-s
   ''; # use linux flags by default
diff --git a/pkgs/tools/system/zenith/default.nix b/pkgs/tools/system/zenith/default.nix
index 4af272ccb49d..ffb530600bd3 100644
--- a/pkgs/tools/system/zenith/default.nix
+++ b/pkgs/tools/system/zenith/default.nix
@@ -7,7 +7,7 @@
 , makeWrapper
 }:
 
-assert nvidiaSupport -> stdenv.isLinux;
+assert nvidiaSupport -> stdenv.hostPlatform.isLinux;
 
 rustPlatform.buildRustPackage rec {
   pname = "zenith";
@@ -34,7 +34,7 @@ rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ rustPlatform.bindgenHook ] ++ lib.optional nvidiaSupport makeWrapper;
-  buildInputs = lib.optionals stdenv.isDarwin [ IOKit ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];
 
   buildFeatures = lib.optional nvidiaSupport "nvidia";
 
diff --git a/pkgs/tools/text/amber/default.nix b/pkgs/tools/text/amber/default.nix
index 0b81281fad1a..ce8243770b04 100644
--- a/pkgs/tools/text/amber/default.nix
+++ b/pkgs/tools/text/amber/default.nix
@@ -15,7 +15,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-nBSgP30Izskq9RbhVIyqWzZgG5ZWHVdiukldw+Q0rco=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   meta = with lib; {
     description = "Code search-and-replace tool";
diff --git a/pkgs/tools/text/autocorrect/default.nix b/pkgs/tools/text/autocorrect/default.nix
index 3546b79e0a52..c752c9cf11c1 100644
--- a/pkgs/tools/text/autocorrect/default.nix
+++ b/pkgs/tools/text/autocorrect/default.nix
@@ -19,7 +19,7 @@ rustPlatform.buildRustPackage rec {
     cp ${./Cargo.lock} Cargo.lock
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   cargoBuildFlags = [ "-p" "autocorrect-cli" ];
   cargoTestFlags = [ "-p" "autocorrect-cli" ];
diff --git a/pkgs/tools/text/chars/default.nix b/pkgs/tools/text/chars/default.nix
index 509953e8059b..ca2ad027c2cf 100644
--- a/pkgs/tools/text/chars/default.nix
+++ b/pkgs/tools/text/chars/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-wqyExG4haco6jg1zpbouz3xMR7sjiVIAC16PnDU2tc8=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Commandline tool to display information about unicode characters";
diff --git a/pkgs/tools/text/clima/default.nix b/pkgs/tools/text/clima/default.nix
index 65483e115269..f7e6ee15d7f8 100644
--- a/pkgs/tools/text/clima/default.nix
+++ b/pkgs/tools/text/clima/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-jKY+Ta6lqMBUlqSViKk3W0CiO8oU+ucmleKDYRA54HQ=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/text/cmigemo/default.nix b/pkgs/tools/text/cmigemo/default.nix
index 20cee369e73f..b7b08a762736 100644
--- a/pkgs/tools/text/cmigemo/default.nix
+++ b/pkgs/tools/text/cmigemo/default.nix
@@ -24,9 +24,9 @@ stdenv.mkDerivation {
 
   makeFlags = [ "INSTALL=install" ];
 
-  buildFlags = [ (if stdenv.isDarwin then "osx-all" else "gcc-all") ];
+  buildFlags = [ (if stdenv.hostPlatform.isDarwin then "osx-all" else "gcc-all") ];
 
-  installTargets = [ (if stdenv.isDarwin then "osx-install" else "gcc-install") ];
+  installTargets = [ (if stdenv.hostPlatform.isDarwin then "osx-install" else "gcc-install") ];
 
   meta = with lib; {
     description = "Tool that supports Japanese incremental search with Romaji";
diff --git a/pkgs/tools/text/coloursum/default.nix b/pkgs/tools/text/coloursum/default.nix
index 78f583e3f73d..8e84a1de14bc 100644
--- a/pkgs/tools/text/coloursum/default.nix
+++ b/pkgs/tools/text/coloursum/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-dhcTpff4h37MHNbLoYUZiolSclSGcFrMJ3kKLCZAVAw=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Colourise your checksum output";
diff --git a/pkgs/tools/text/dcs/default.nix b/pkgs/tools/text/dcs/default.nix
index 0f438e4ff571..458a76cf5913 100644
--- a/pkgs/tools/text/dcs/default.nix
+++ b/pkgs/tools/text/dcs/default.nix
@@ -41,7 +41,7 @@ buildGoModule {
     homepage = "https://github.com/Debian/dcs";
     license = licenses.bsd3;
     maintainers = [ ];
-    broken = stdenv.isAarch64
-      || stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dcs.x86_64-darwin
+    broken = stdenv.hostPlatform.isAarch64
+      || stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/dcs.x86_64-darwin
   };
 }
diff --git a/pkgs/tools/text/diffr/default.nix b/pkgs/tools/text/diffr/default.nix
index 9abc2fac5150..fbdf221d1206 100644
--- a/pkgs/tools/text/diffr/default.nix
+++ b/pkgs/tools/text/diffr/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-RmQu55OnKfeuDGcJrfjhMKnxDatdowkvh3Kh4N8I8Sg=";
 
-  buildInputs = (lib.optional stdenv.isDarwin Security);
+  buildInputs = (lib.optional stdenv.hostPlatform.isDarwin Security);
 
   preCheck = ''
     export DIFFR_TESTS_BINARY_PATH=$releaseDir/diffr
diff --git a/pkgs/tools/text/discount/default.nix b/pkgs/tools/text/discount/default.nix
index e71b5941ea93..d2219955d3dc 100644
--- a/pkgs/tools/text/discount/default.nix
+++ b/pkgs/tools/text/discount/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  postFixup = lib.optionalString stdenv.isDarwin ''
+  postFixup = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -id "$out/lib/libmarkdown.dylib" "$out/lib/libmarkdown.dylib"
     for exe in $out/bin/*; do
       install_name_tool -change libmarkdown.dylib "$out/lib/libmarkdown.dylib" "$exe"
diff --git a/pkgs/tools/text/fastmod/default.nix b/pkgs/tools/text/fastmod/default.nix
index e7b2f3b107c9..f8cc3055e905 100644
--- a/pkgs/tools/text/fastmod/default.nix
+++ b/pkgs/tools/text/fastmod/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-sFrABp4oYhel+GONFsTbunq+4We2DicvF9A3FT/ZArc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv Security ];
 
   meta = with lib; {
     description = "Utility that makes sweeping changes to large, shared code bases";
diff --git a/pkgs/tools/text/fst/default.nix b/pkgs/tools/text/fst/default.nix
index 1f1b2950e160..c43a781cf6e1 100644
--- a/pkgs/tools/text/fst/default.nix
+++ b/pkgs/tools/text/fst/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-yTbEaw+BbjVks3j7/b75kGoUjVftLaVYvYIdI/bbfdk=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   doInstallCheck = true;
   installCheckPhase = ''
diff --git a/pkgs/tools/text/gawk/default.nix b/pkgs/tools/text/gawk/default.nix
index 941e102cb3b0..103f9e16eb66 100644
--- a/pkgs/tools/text/gawk/default.nix
+++ b/pkgs/tools/text/gawk/default.nix
@@ -7,16 +7,16 @@
 , autoreconfHook # no-pma fix
 
 /* Test suite broke on:
-       stdenv.isCygwin # XXX: `test-dup2' segfaults on Cygwin 6.1
-    || stdenv.isDarwin # XXX: `locale' segfaults
-    || stdenv.isSunOS  # XXX: `_backsmalls1' fails, locale stuff?
-    || stdenv.isFreeBSD
+       stdenv.hostPlatform.isCygwin # XXX: `test-dup2' segfaults on Cygwin 6.1
+    || stdenv.hostPlatform.isDarwin # XXX: `locale' segfaults
+    || stdenv.hostPlatform.isSunOS  # XXX: `_backsmalls1' fails, locale stuff?
+    || stdenv.hostPlatform.isFreeBSD
 */
-, doCheck ? (interactive && stdenv.isLinux), glibcLocales ? null
+, doCheck ? (interactive && stdenv.hostPlatform.isLinux), glibcLocales ? null
 , locale ? null
 }:
 
-assert (doCheck && stdenv.isLinux) -> glibcLocales != null;
+assert (doCheck && stdenv.hostPlatform.isLinux) -> glibcLocales != null;
 
 stdenv.mkDerivation rec {
   pname = "gawk" + lib.optionalString interactive "-interactive";
@@ -44,7 +44,7 @@ stdenv.mkDerivation rec {
     autoreconfHook
   ] ++ lib.optionals interactive [
     removeReferencesTo
-  ] ++ lib.optionals (doCheck && stdenv.isLinux) [
+  ] ++ lib.optionals (doCheck && stdenv.hostPlatform.isLinux) [
     glibcLocales
   ];
 
@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
     readline
   ] ++ lib.optionals withSigsegv [
     libsigsegv
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     locale
   ];
 
diff --git a/pkgs/tools/text/gawk/gawkextlib.nix b/pkgs/tools/text/gawk/gawkextlib.nix
index 86bf2beaa91d..eaf7799a4860 100644
--- a/pkgs/tools/text/gawk/gawkextlib.nix
+++ b/pkgs/tools/text/gawk/gawkextlib.nix
@@ -109,14 +109,14 @@ let
       #! No such device
       #  mdb_env_open(env, /dev/null)
       #! Operation not supported by device
-      doCheck = !stdenv.isDarwin;
+      doCheck = !stdenv.hostPlatform.isDarwin;
     };
     mbs = buildExtension {
       inherit gawkextlib;
       name = "mbs";
       extraBuildInputs = [ glibcLocales ];
       #! "spät": length: 5, mbs_length: 6, wcswidth: 4
-      doCheck = !stdenv.isDarwin;
+      doCheck = !stdenv.hostPlatform.isDarwin;
     };
     mpfr = buildExtension {
       inherit gawkextlib;
diff --git a/pkgs/tools/text/glogg/default.nix b/pkgs/tools/text/glogg/default.nix
index 7a6562aab143..04aac6b0b871 100644
--- a/pkgs/tools/text/glogg/default.nix
+++ b/pkgs/tools/text/glogg/default.nix
@@ -11,7 +11,7 @@ mkDerivation rec {
     sha256 = "0hf1c2m8n88frmxmyn0ndr8129p7iky49nq565sw1asaydm5z6pb";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace glogg.pro \
       --replace "boost_program_options-mt" "boost_program_options"
   '';
@@ -21,7 +21,7 @@ mkDerivation rec {
 
   qmakeFlags = [ "VERSION=${version}" ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
     mv $out/bin/glogg.app $out/Applications/glogg.app
     rm -fr $out/{bin,share}
diff --git a/pkgs/tools/text/gnugrep/default.nix b/pkgs/tools/text/gnugrep/default.nix
index 40bd33758b54..bbb876703f2b 100644
--- a/pkgs/tools/text/gnugrep/default.nix
+++ b/pkgs/tools/text/gnugrep/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
   # cygwin: FAIL: multibyte-white-space
   # freebsd: FAIL mb-non-UTF8-performance
   # x86_64-darwin: fails 'stack-overflow' tests on Rosetta 2 emulator
-  doCheck = !stdenv.isCygwin && !stdenv.isFreeBSD && !(stdenv.isDarwin && stdenv.hostPlatform.isx86_64) && !stdenv.buildPlatform.isRiscV64;
+  doCheck = !stdenv.hostPlatform.isCygwin && !stdenv.hostPlatform.isFreeBSD && !(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64) && !stdenv.buildPlatform.isRiscV64;
 
   # On macOS, force use of mkdir -p, since Grep's fallback
   # (./install-sh) is broken.
diff --git a/pkgs/tools/text/highlight/default.nix b/pkgs/tools/text/highlight/default.nix
index a2f91efc9494..868de0fb679e 100644
--- a/pkgs/tools/text/highlight/default.nix
+++ b/pkgs/tools/text/highlight/default.nix
@@ -15,7 +15,7 @@ let
     enableParallelBuilding = true;
 
     nativeBuildInputs = [ pkg-config swig perl ]
-      ++ lib.optional stdenv.isDarwin gcc;
+      ++ lib.optional stdenv.hostPlatform.isDarwin gcc;
 
     buildInputs = [ getopt lua boost libxcrypt ];
 
@@ -35,15 +35,15 @@ let
 
     # This has to happen _before_ the main build because it does a
     # `make clean' for some reason.
-    preBuild = lib.optionalString (!stdenv.isDarwin) ''
+    preBuild = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       make -C extras/swig $makeFlags perl
     '';
 
-    postCheck = lib.optionalString (!stdenv.isDarwin) ''
+    postCheck = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       perl -Iextras/swig extras/swig/testmod.pl
     '';
 
-    preInstall = lib.optionalString (!stdenv.isDarwin) ''
+    preInstall = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
       mkdir -p $out/${perl.libPrefix}
       install -m644 extras/swig/highlight.{so,pm} $out/${perl.libPrefix}
       make -C extras/swig clean # Clean up intermediate files.
@@ -59,5 +59,5 @@ let
   };
 
 in
-  if stdenv.isDarwin then self
+  if stdenv.hostPlatform.isDarwin then self
   else perl.pkgs.toPerlModule self
diff --git a/pkgs/tools/text/html2text/default.nix b/pkgs/tools/text/html2text/default.nix
index 247ee8e814df..afa4bb114037 100644
--- a/pkgs/tools/text/html2text/default.nix
+++ b/pkgs/tools/text/html2text/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ autoreconfHook ];
 
-  buildInputs = lib.optional stdenv.isDarwin libiconv;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   meta = {
     description = "Convert HTML to plain text";
diff --git a/pkgs/tools/text/hyx/default.nix b/pkgs/tools/text/hyx/default.nix
index 3cbcac20966a..e41f9bbfceb2 100644
--- a/pkgs/tools/text/hyx/default.nix
+++ b/pkgs/tools/text/hyx/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-dufx3zsabeet7Rp0d60MIuNqisIQd6UgE7WDZYNHl3E=";
   };
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace Makefile \
       --replace "-Wl,-z,relro,-z,now -fpic -pie" ""
   '';
diff --git a/pkgs/tools/text/igrep/default.nix b/pkgs/tools/text/igrep/default.nix
index e2751197c717..a4c4a134c4b6 100644
--- a/pkgs/tools/text/igrep/default.nix
+++ b/pkgs/tools/text/igrep/default.nix
@@ -20,7 +20,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-raSz/+u7P04qHmvdfYoWKOKtNtaFlgmT8Nw0ImhCMkU=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   passthru.tests = {
     version = testers.testVersion { package = igrep; command = "ig --version"; };
diff --git a/pkgs/tools/text/ispell/default.nix b/pkgs/tools/text/ispell/default.nix
index 3dea94d0912b..844f35612ff4 100644
--- a/pkgs/tools/text/ispell/default.nix
+++ b/pkgs/tools/text/ispell/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     cat >> local.h <<EOF
-    ${lib.optionalString (!stdenv.isDarwin) "#define USG"}
+    ${lib.optionalString (!stdenv.hostPlatform.isDarwin) "#define USG"}
     #define TERMLIB "-lncurses"
     #define LANGUAGES "{american,MASTERDICTS=american.med,HASHFILES=americanmed.hash}"
     #define MASTERHASH "americanmed.hash"
diff --git a/pkgs/tools/text/jen/default.nix b/pkgs/tools/text/jen/default.nix
index cfd8298c3725..a29b2e905803 100644
--- a/pkgs/tools/text/jen/default.nix
+++ b/pkgs/tools/text/jen/default.nix
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-LKiPG7k5UgaESP1ShsIWNMnm9resbRje746txOBo+Qs=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/text/jumanpp/default.nix b/pkgs/tools/text/jumanpp/default.nix
index 382b2f319c14..5dff6f6f48af 100644
--- a/pkgs/tools/text/jumanpp/default.nix
+++ b/pkgs/tools/text/jumanpp/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ protobuf ]
-    ++ lib.optional stdenv.isDarwin libiconv;
+    ++ lib.optional stdenv.hostPlatform.isDarwin libiconv;
 
   meta = with lib; {
     description = "Japanese morphological analyser using a recurrent neural network language model (RNNLM)";
diff --git a/pkgs/tools/text/kakasi/default.nix b/pkgs/tools/text/kakasi/default.nix
index fa509f1b4a72..9e0cc95bff4f 100644
--- a/pkgs/tools/text/kakasi/default.nix
+++ b/pkgs/tools/text/kakasi/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   pname = "kakasi";
   version = "2.3.6";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   meta = with lib; {
     description = "Kanji Kana Simple Inverter";
diff --git a/pkgs/tools/text/kdiff3/default.nix b/pkgs/tools/text/kdiff3/default.nix
index f322a6f7d7c3..0b1e13a424e8 100644
--- a/pkgs/tools/text/kdiff3/default.nix
+++ b/pkgs/tools/text/kdiff3/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   cmakeFlags = [ "-Wno-dev" ];
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     ln -s "$out/Applications/KDE/kdiff3.app/Contents/MacOS" "$out/bin"
   '';
 
diff --git a/pkgs/tools/text/languagetool-rust/default.nix b/pkgs/tools/text/languagetool-rust/default.nix
index 1772f9d1e305..15b0ccb46611 100644
--- a/pkgs/tools/text/languagetool-rust/default.nix
+++ b/pkgs/tools/text/languagetool-rust/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
   buildFeatures = [ "full" ];
 
   nativeBuildInputs = [ installShellFiles pkg-config ];
-  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   checkFlags = [
     # requires network access
diff --git a/pkgs/tools/text/mdbook-admonish/default.nix b/pkgs/tools/text/mdbook-admonish/default.nix
index 1a781053811f..da29d25dcb33 100644
--- a/pkgs/tools/text/mdbook-admonish/default.nix
+++ b/pkgs/tools/text/mdbook-admonish/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-CG4WvAFDqtRUjF4kJ29363F6jWRChIXgT5i6ozwV4pw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Preprocessor for mdbook to add Material Design admonishments";
diff --git a/pkgs/tools/text/mdbook-emojicodes/default.nix b/pkgs/tools/text/mdbook-emojicodes/default.nix
index d57ba39b803c..fbdd19fb72b0 100644
--- a/pkgs/tools/text/mdbook-emojicodes/default.nix
+++ b/pkgs/tools/text/mdbook-emojicodes/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-SkvAtV613+ARk79dB2zRKoLjPgdzoEKQa3JrRw9qBkA=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
   ];
 
diff --git a/pkgs/tools/text/mdbook-epub/default.nix b/pkgs/tools/text/mdbook-epub/default.nix
index 48dbe92ca6ce..d9418f67b145 100644
--- a/pkgs/tools/text/mdbook-epub/default.nix
+++ b/pkgs/tools/text/mdbook-epub/default.nix
@@ -28,7 +28,7 @@ in rustPlatform.buildRustPackage {
 
   buildInputs = [
     bzip2
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/tools/text/mdbook-footnote/default.nix b/pkgs/tools/text/mdbook-footnote/default.nix
index 1b3ad02e5c7f..791cb07d02be 100644
--- a/pkgs/tools/text/mdbook-footnote/default.nix
+++ b/pkgs/tools/text/mdbook-footnote/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-Ig+uVCO5oHIkkvFsKiBiUFzjUgH/Pydn4MVJHb2wKGc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Preprocessor for mdbook to support the inclusion of automatically numbered footnotes";
diff --git a/pkgs/tools/text/mdbook-graphviz/default.nix b/pkgs/tools/text/mdbook-graphviz/default.nix
index 19719ac504d7..9328cba50f6c 100644
--- a/pkgs/tools/text/mdbook-graphviz/default.nix
+++ b/pkgs/tools/text/mdbook-graphviz/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-cMCNZ8Ezp7bFx4EnuZCXhqoaE0yN3iK9KnCYBYGPHKc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   nativeCheckInputs = [ graphviz ];
 
diff --git a/pkgs/tools/text/mdbook-katex/default.nix b/pkgs/tools/text/mdbook-katex/default.nix
index b6c2a1ec1d30..0c2c53825b7e 100644
--- a/pkgs/tools/text/mdbook-katex/default.nix
+++ b/pkgs/tools/text/mdbook-katex/default.nix
@@ -11,7 +11,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-U8uDcNkEyz7zAqCTthY5SVGshsJRKRaoBLOpBpQ9sho=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Preprocessor for mdbook, rendering LaTeX equations to HTML at build time";
diff --git a/pkgs/tools/text/mdbook-kroki-preprocessor/default.nix b/pkgs/tools/text/mdbook-kroki-preprocessor/default.nix
index e69c8185e3c3..8404f414a4aa 100644
--- a/pkgs/tools/text/mdbook-kroki-preprocessor/default.nix
+++ b/pkgs/tools/text/mdbook-kroki-preprocessor/default.nix
@@ -26,7 +26,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.CoreFoundation
     darwin.apple_sdk.frameworks.Security
   ];
diff --git a/pkgs/tools/text/mdbook-linkcheck/default.nix b/pkgs/tools/text/mdbook-linkcheck/default.nix
index 7129cdd0442c..7ff872a9d0de 100644
--- a/pkgs/tools/text/mdbook-linkcheck/default.nix
+++ b/pkgs/tools/text/mdbook-linkcheck/default.nix
@@ -14,9 +14,9 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-AwixlCL5ZcLgj9wYeBvkSy2U6J8alXf488l8DMn73w4=";
 
-  buildInputs = if stdenv.isDarwin then [ Security ] else [ openssl ];
+  buildInputs = if stdenv.hostPlatform.isDarwin then [ Security ] else [ openssl ];
 
-  nativeBuildInputs = lib.optionals (!stdenv.isDarwin) [ pkg-config ];
+  nativeBuildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ pkg-config ];
 
   OPENSSL_NO_VENDOR = 1;
 
diff --git a/pkgs/tools/text/mdbook-mermaid/default.nix b/pkgs/tools/text/mdbook-mermaid/default.nix
index 0f2137a3976a..b4e837a2082a 100644
--- a/pkgs/tools/text/mdbook-mermaid/default.nix
+++ b/pkgs/tools/text/mdbook-mermaid/default.nix
@@ -18,7 +18,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-BnbllOsidqDEfKs0pd6AzFjzo51PKm9uFSwmOGTW3ug=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/tools/text/mdbook-pdf/default.nix b/pkgs/tools/text/mdbook-pdf/default.nix
index 8bed07bd33b8..ab889398ceff 100644
--- a/pkgs/tools/text/mdbook-pdf/default.nix
+++ b/pkgs/tools/text/mdbook-pdf/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     openssl
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     CoreServices
   ];
 
diff --git a/pkgs/tools/text/mdbook-plantuml/default.nix b/pkgs/tools/text/mdbook-plantuml/default.nix
index e5ee827d816e..e3665aa2f43f 100644
--- a/pkgs/tools/text/mdbook-plantuml/default.nix
+++ b/pkgs/tools/text/mdbook-plantuml/default.nix
@@ -33,7 +33,7 @@ rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ CoreServices ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "mdBook preprocessor to render PlantUML diagrams to png images in the book output directory";
diff --git a/pkgs/tools/text/mdbook-toc/default.nix b/pkgs/tools/text/mdbook-toc/default.nix
index a9c3855964b5..2555e03c124c 100644
--- a/pkgs/tools/text/mdbook-toc/default.nix
+++ b/pkgs/tools/text/mdbook-toc/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-95W0gERjwL9r0+DOgxQu+sjSFSThWeShLAqlDQiGxFw=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ CoreServices ];
 
   meta = with lib; {
     description = "Preprocessor for mdbook to add inline Table of Contents support";
diff --git a/pkgs/tools/text/mdcat/default.nix b/pkgs/tools/text/mdcat/default.nix
index d4d295e0057a..d21a9db65683 100644
--- a/pkgs/tools/text/mdcat/default.nix
+++ b/pkgs/tools/text/mdcat/default.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ pkg-config asciidoctor installShellFiles ];
   buildInputs = [ openssl ]
-    ++ lib.optionals stdenv.isDarwin [ Security SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security SystemConfiguration ];
 
   cargoHash = "sha256-KEJOpQ9Y832M0IUrm6u7SYWTH8/blDfu0kubS2GMuRE=";
 
diff --git a/pkgs/tools/text/pinyin-tool/default.nix b/pkgs/tools/text/pinyin-tool/default.nix
index b2427e4f5f4b..e287c2a5cc79 100644
--- a/pkgs/tools/text/pinyin-tool/default.nix
+++ b/pkgs/tools/text/pinyin-tool/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-jeRKtKv8Lg/ritl42dMbEQpXaNlCIaHTrw0xtPQitMc=";
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   meta = with lib; {
     description = "Simple command line tool for converting Chinese characters to space-separate pinyin words";
diff --git a/pkgs/tools/text/poedit/default.nix b/pkgs/tools/text/poedit/default.nix
index 6133bc409ddc..101a08422c18 100644
--- a/pkgs/tools/text/poedit/default.nix
+++ b/pkgs/tools/text/poedit/default.nix
@@ -47,6 +47,6 @@ stdenv.mkDerivation rec {
     platforms = platforms.unix;
     maintainers = with maintainers; [ dasj19 ];
     # configure: error: GTK+ build of wxWidgets is required
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/text/rare-regex/default.nix b/pkgs/tools/text/rare-regex/default.nix
index b565ed8aded2..1c9bece2ffee 100644
--- a/pkgs/tools/text/rare-regex/default.nix
+++ b/pkgs/tools/text/rare-regex/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , buildGoModule
 , fetchFromGitHub
-, withPcre2 ? stdenv.isLinux
+, withPcre2 ? stdenv.hostPlatform.isLinux
 , pcre2
 , testers
 , rare-regex
diff --git a/pkgs/tools/text/ripgrep-all/default.nix b/pkgs/tools/text/ripgrep-all/default.nix
index daed3da28e74..d65c399d5ce8 100644
--- a/pkgs/tools/text/ripgrep-all/default.nix
+++ b/pkgs/tools/text/ripgrep-all/default.nix
@@ -40,7 +40,7 @@ in rustPlatform.buildRustPackage rec {
   };
 
   nativeBuildInputs = [ makeWrapper poppler_utils ];
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   nativeCheckInputs = path;
 
diff --git a/pkgs/tools/text/ripgrep/default.nix b/pkgs/tools/text/ripgrep/default.nix
index a89cd2ae3904..e3270f359f1b 100644
--- a/pkgs/tools/text/ripgrep/default.nix
+++ b/pkgs/tools/text/ripgrep/default.nix
@@ -28,7 +28,7 @@ in rustPlatform.buildRustPackage rec {
   nativeBuildInputs = [ installShellFiles ]
     ++ lib.optional withPCRE2 pkg-config;
   buildInputs = lib.optional withPCRE2 pcre2
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   buildFeatures = lib.optional withPCRE2 "pcre2";
 
diff --git a/pkgs/tools/text/rosie/default.nix b/pkgs/tools/text/rosie/default.nix
index 0a87425a16a7..5cad6650d2ce 100644
--- a/pkgs/tools/text/rosie/default.nix
+++ b/pkgs/tools/text/rosie/default.nix
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     sed -iE '/ld.so.conf.d/d' Makefile
   '';
 
-  preInstall = lib.optionalString stdenv.isDarwin ''
+  preInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     install_name_tool -add_rpath $out/lib build/bin/rosie
     install_name_tool -id $out/lib/librosie.dylib build/lib/librosie.dylib
   '';
diff --git a/pkgs/tools/text/runiq/default.nix b/pkgs/tools/text/runiq/default.nix
index 439dcb0715d6..bcc7952d74b0 100644
--- a/pkgs/tools/text/runiq/default.nix
+++ b/pkgs/tools/text/runiq/default.nix
@@ -17,7 +17,7 @@ rustPlatform.buildRustPackage rec {
     ln -s ${./Cargo.lock} Cargo.lock
   '';
 
-  buildInputs = lib.optionals stdenv.isDarwin [
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/text/ruplacer/default.nix b/pkgs/tools/text/ruplacer/default.nix
index 4453f7317db6..be4d46facc23 100644
--- a/pkgs/tools/text/ruplacer/default.nix
+++ b/pkgs/tools/text/ruplacer/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-EyLompGEin12q6SC1M1D0QsE42HVEq5O/E99qi54cGo=";
 
-  buildInputs = (lib.optional stdenv.isDarwin Security);
+  buildInputs = (lib.optional stdenv.hostPlatform.isDarwin Security);
 
   meta = with lib; {
     description = "Find and replace text in source files";
diff --git a/pkgs/tools/text/sd/default.nix b/pkgs/tools/text/sd/default.nix
index e5bde420000d..d1c7e36a6593 100644
--- a/pkgs/tools/text/sd/default.nix
+++ b/pkgs/tools/text/sd/default.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 
   postInstall = ''
     installManPage gen/sd.1
diff --git a/pkgs/tools/text/sgml/opensp/default.nix b/pkgs/tools/text/sgml/opensp/default.nix
index a3915a2d664f..2dc71926f210 100644
--- a/pkgs/tools/text/sgml/opensp/default.nix
+++ b/pkgs/tools/text/sgml/opensp/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
     sed -i -e 's/name="idm.*"//g' $out/share/doc/OpenSP/releasenotes.html
     '';
 
-  preConfigure = lib.optionalString stdenv.isCygwin ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isCygwin ''
     autoreconf -fi
   '';
 
@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
   # Clang 16 fails to build due to inappropriate definitions in the `config.h` generated by the
   # existing configure scripts. Regenerate them to make sure they detect its features correctly.
   ++ lib.optional stdenv.cc.isClang autoreconfHook
-  ++ lib.optionals stdenv.isCygwin [ autoconf automake libtool ];
+  ++ lib.optionals stdenv.hostPlatform.isCygwin [ autoconf automake libtool ];
 
   doCheck = false; # fails
 
diff --git a/pkgs/tools/text/silver-searcher/default.nix b/pkgs/tools/text/silver-searcher/default.nix
index 568b49371f69..c5e5986d6b98 100644
--- a/pkgs/tools/text/silver-searcher/default.nix
+++ b/pkgs/tools/text/silver-searcher/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   #     `print_mtx'; src/ignore.o:/build/source/src/log.h:12: first defined here
   # TODO: remove once next release has https://github.com/ggreer/the_silver_searcher/pull/1377
   env.NIX_CFLAGS_COMPILE = "-fcommon";
-  NIX_LDFLAGS = lib.optionalString stdenv.isLinux "-lgcc_s";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isLinux "-lgcc_s";
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];
   buildInputs = [ pcre zlib xz ];
diff --git a/pkgs/tools/text/tab/default.nix b/pkgs/tools/text/tab/default.nix
index 431b046471a4..f812bc9c6be4 100644
--- a/pkgs/tools/text/tab/default.nix
+++ b/pkgs/tools/text/tab/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   nativeCheckInputs = [ python3 ];
 
-  doCheck = !stdenv.isDarwin;
+  doCheck = !stdenv.hostPlatform.isDarwin;
 
   checkTarget = "test";
 
diff --git a/pkgs/tools/text/teip/default.nix b/pkgs/tools/text/teip/default.nix
index 90a41a8cf38d..ab140f2a578c 100644
--- a/pkgs/tools/text/teip/default.nix
+++ b/pkgs/tools/text/teip/default.nix
@@ -25,7 +25,7 @@ rustPlatform.buildRustPackage rec {
 
   # tests are locale sensitive
   preCheck = ''
-    export LANG=${if stdenv.isDarwin then "en_US.UTF-8" else "C.UTF-8"}
+    export LANG=${if stdenv.hostPlatform.isDarwin then "en_US.UTF-8" else "C.UTF-8"}
   '';
 
   postInstall = ''
diff --git a/pkgs/tools/text/termbook/default.nix b/pkgs/tools/text/termbook/default.nix
index 437016e25ec2..7172de5e41d7 100644
--- a/pkgs/tools/text/termbook/default.nix
+++ b/pkgs/tools/text/termbook/default.nix
@@ -30,7 +30,7 @@ rustPlatform.buildRustPackage rec {
 
   buildInputs = [
     oniguruma
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.apple_sdk.frameworks.Security
   ];
 
diff --git a/pkgs/tools/text/xml/basex/default.nix b/pkgs/tools/text/xml/basex/default.nix
index e355e58d2ecc..a367c61d5bc8 100644
--- a/pkgs/tools/text/xml/basex/default.nix
+++ b/pkgs/tools/text/xml/basex/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ unzip copyDesktopItems ];
   buildInputs = [ jre ];
 
-  desktopItems = lib.optional (!stdenv.isDarwin) (makeDesktopItem {
+  desktopItems = lib.optional (!stdenv.hostPlatform.isDarwin) (makeDesktopItem {
     name = "basex";
     exec = "basexgui %f";
     icon = "${./basex.svg}"; # icon copied from Ubuntu basex package
diff --git a/pkgs/tools/text/xsv/default.nix b/pkgs/tools/text/xsv/default.nix
index b779a6c962ca..62b6a83d3f32 100644
--- a/pkgs/tools/text/xsv/default.nix
+++ b/pkgs/tools/text/xsv/default.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-y9f9eBMhSBx6L3cZyZ4VkNSB7yJ55khCskUp6t4HBq4=";
 
-  buildInputs = lib.optional stdenv.isDarwin Security;
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin Security;
 
   meta = with lib; {
     description = "Fast CSV toolkit written in Rust";
diff --git a/pkgs/tools/typesetting/biber-ms/default.nix b/pkgs/tools/typesetting/biber-ms/default.nix
index 27821bbd8ada..38452d7f9638 100644
--- a/pkgs/tools/typesetting/biber-ms/default.nix
+++ b/pkgs/tools/typesetting/biber-ms/default.nix
@@ -33,7 +33,7 @@ perlPackages.buildPerlModule {
     TextCSV_XS TextRoman URI UnicodeLineBreak XMLLibXML XMLLibXMLSimple
     XMLLibXSLT XMLWriter autovivification
   ];
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
   preConfigure = ''
     cp '${multiscriptBltxml}' t/tdata/multiscript.bltxml
@@ -41,7 +41,7 @@ perlPackages.buildPerlModule {
 
   postInstall = ''
     mv "$out"/bin/biber{,-ms}
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang "$out"/bin/biber-ms
   '';
 
diff --git a/pkgs/tools/typesetting/biber/default.nix b/pkgs/tools/typesetting/biber/default.nix
index f14096900ed9..1e5a4ec21666 100644
--- a/pkgs/tools/typesetting/biber/default.nix
+++ b/pkgs/tools/typesetting/biber/default.nix
@@ -20,9 +20,9 @@ perlPackages.buildPerlModule {
     TestDifferences
     PerlIOutf8_strict
   ];
-  nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+  nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     shortenPerlShebang $out/bin/biber
   '';
 
diff --git a/pkgs/tools/typesetting/htmldoc/default.nix b/pkgs/tools/typesetting/htmldoc/default.nix
index f47c9dac0f10..4dfb307689b4 100644
--- a/pkgs/tools/typesetting/htmldoc/default.nix
+++ b/pkgs/tools/typesetting/htmldoc/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ zlib cups libpng libjpeg ]
-    ++ lib.optionals stdenv.isDarwin [ Foundation SystemConfiguration ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ Foundation SystemConfiguration ];
 
   # do not generate universal binary on Darwin
   # because it is not supported by Nix's clang
diff --git a/pkgs/tools/typesetting/lowdown/default.nix b/pkgs/tools/typesetting/lowdown/default.nix
index bf9e06deca34..e898d7326964 100644
--- a/pkgs/tools/typesetting/lowdown/default.nix
+++ b/pkgs/tools/typesetting/lowdown/default.nix
@@ -52,9 +52,9 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ which dieHook ]
-    ++ lib.optionals stdenv.isDarwin [ fixDarwinDylibNames ];
+    ++ lib.optionals stdenv.hostPlatform.isDarwin [ fixDarwinDylibNames ];
 
-  preConfigure = lib.optionalString (stdenv.isDarwin && stdenv.isAarch64) ''
+  preConfigure = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     echo 'HAVE_SANDBOX_INIT=0' > configure.local
   '';
 
@@ -85,13 +85,13 @@ stdenv.mkDerivation rec {
     in
 
     # Check that soVersion is up to date even if we are not on darwin
-    lib.optionalString (enableShared && !stdenv.isDarwin) ''
+    lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
       test -f $lib/lib/liblowdown.so.${soVersion} || \
         die "postInstall: expected $lib/lib/liblowdown.so.${soVersion} is missing"
     ''
     # Fix lib extension so that fixDarwinDylibNames detects it, see
     # <https://github.com/kristapsdz/lowdown/issues/87#issuecomment-1532243650>.
-    + lib.optionalString (enableShared && stdenv.isDarwin) ''
+    + lib.optionalString (enableShared && stdenv.hostPlatform.isDarwin) ''
       darwinDylib="$lib/lib/liblowdown.${soVersion}.dylib"
       mv "$lib/lib/liblowdown.so.${soVersion}" "$darwinDylib"
 
diff --git a/pkgs/tools/typesetting/sile/default.nix b/pkgs/tools/typesetting/sile/default.nix
index b6a77b55f685..49dbc74422e7 100644
--- a/pkgs/tools/typesetting/sile/default.nix
+++ b/pkgs/tools/typesetting/sile/default.nix
@@ -70,13 +70,13 @@ stdenv.mkDerivation (finalAttrs: {
     fontconfig
     libiconv
   ]
-  ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.AppKit
+  ++ lib.optional stdenv.hostPlatform.isDarwin darwin.apple_sdk.frameworks.AppKit
   ;
   passthru = {
     # So it will be easier to inspect this environment, in comparison to others
     inherit luaEnv;
     # Copied from Makefile.am
-    tests.test = lib.optionalAttrs (!(stdenv.isDarwin && stdenv.isAarch64)) (
+    tests.test = lib.optionalAttrs (!(stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64)) (
       runCommand "sile-test"
         {
           nativeBuildInputs = [ poppler_utils sile ];
@@ -90,11 +90,11 @@ stdenv.mkDerivation (finalAttrs: {
 
   postPatch = ''
     patchShebangs build-aux/*.sh
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i -e 's|@import AppKit;|#import <AppKit/AppKit.h>|' src/macfonts.m
   '';
 
-  NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework AppKit";
+  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-framework AppKit";
 
   FONTCONFIG_FILE = makeFontsConf {
     fontDirectories = [
@@ -110,7 +110,7 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   # remove forbidden references to $TMPDIR
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     for f in "$out"/bin/*; do
       if isELF "$f"; then
         patchelf --shrink-rpath --allowed-rpath-prefixes "$NIX_STORE" "$f"
diff --git a/pkgs/tools/typesetting/tectonic/default.nix b/pkgs/tools/typesetting/tectonic/default.nix
index 0cc8b18de92a..815cc01f8be6 100644
--- a/pkgs/tools/typesetting/tectonic/default.nix
+++ b/pkgs/tools/typesetting/tectonic/default.nix
@@ -45,12 +45,12 @@ rustPlatform.buildRustPackage rec {
   buildFeatures = [ "external-harfbuzz" ];
 
   buildInputs = [ icu fontconfig harfbuzz openssl ]
-    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ ApplicationServices Cocoa Foundation ]);
+    ++ lib.optionals stdenv.hostPlatform.isDarwin (with darwin.apple_sdk.frameworks; [ ApplicationServices Cocoa Foundation ]);
 
   postInstall = ''
     # Makes it possible to automatically use the V2 CLI API
     ln -s $out/bin/tectonic $out/bin/nextonic
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
     substituteInPlace dist/appimage/tectonic.desktop \
       --replace Exec=tectonic Exec=$out/bin/tectonic
     install -D dist/appimage/tectonic.desktop -t $out/share/applications/
diff --git a/pkgs/tools/typesetting/ted/default.nix b/pkgs/tools/typesetting/ted/default.nix
index 4cff637d7706..a6c46c6c7df5 100644
--- a/pkgs/tools/typesetting/ted/default.nix
+++ b/pkgs/tools/typesetting/ted/default.nix
@@ -78,7 +78,7 @@ stdenv.mkDerivation rec {
     homepage    = "https://nllgg.nl/Ted/";
     license     = licenses.gpl2Only;
     platforms   = platforms.all;
-    broken      = stdenv.isDarwin;
+    broken      = stdenv.hostPlatform.isDarwin;
     maintainers = with maintainers; [ obadz ];
   };
 }
diff --git a/pkgs/tools/typesetting/tex/blahtexml/default.nix b/pkgs/tools/typesetting/tex/blahtexml/default.nix
index 9d88ac3b0be6..8f4b1980d313 100644
--- a/pkgs/tools/typesetting/tex/blahtexml/default.nix
+++ b/pkgs/tools/typesetting/tex/blahtexml/default.nix
@@ -24,11 +24,11 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "doc" ];
 
   nativeBuildInputs = [ texliveFull ]; # scheme-full needed for ucs package
-  buildInputs = [ xercesc ] ++ lib.optionals stdenv.isDarwin [ libiconv ];
+  buildInputs = [ xercesc ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ libiconv ];
 
   buildFlags =
     [ "doc" ] ++
-    (if stdenv.isDarwin
+    (if stdenv.hostPlatform.isDarwin
      then [ "blahtex-mac" "blahtexml-mac" ]
      else [ "blahtex-linux" "blahtexml-linux" ]);
 
diff --git a/pkgs/tools/typesetting/tex/tetex/default.nix b/pkgs/tools/typesetting/tex/tetex/default.nix
index 6000a13ec621..02471c863184 100644
--- a/pkgs/tools/typesetting/tex/tetex/default.nix
+++ b/pkgs/tools/typesetting/tex/tetex/default.nix
@@ -19,11 +19,11 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   # fixes "error: conflicting types for 'calloc'", etc.
-  preBuild = lib.optionalString stdenv.isDarwin ''
+  preBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
     sed -i 57d texk/kpathsea/c-std.h
   '';
 
-  preConfigure = if stdenv.isCygwin then ''
+  preConfigure = if stdenv.hostPlatform.isCygwin then ''
     find ./ -name "config.guess" -exec rm {} \; -exec ln -s ${automake}/share/automake-*/config.guess {} \;
   '' else null;
 
@@ -41,7 +41,7 @@ stdenv.mkDerivation rec {
       "--without-oxdvik" "--without-texinfo" "--without-texi2html"
       "--with-system-zlib" "--with-system-pnglib" "--with-system-ncurses" ]
     # couldn't get gsftopk working on darwin
-    ++ lib.optional stdenv.isDarwin "--without-gsftopk";
+    ++ lib.optional stdenv.hostPlatform.isDarwin "--without-gsftopk";
 
   postUnpack = ''
     mkdir -p $out/share/texmf
diff --git a/pkgs/tools/typesetting/tex/texpresso/default.nix b/pkgs/tools/typesetting/tex/texpresso/default.nix
index 8653782da71c..73c111bd22b0 100644
--- a/pkgs/tools/typesetting/tex/texpresso/default.nix
+++ b/pkgs/tools/typesetting/tex/texpresso/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
 
   buildFlags = [ "texpresso" ];
 
-  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.isDarwin [
+  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.hostPlatform.isDarwin [
     "-Wno-error=implicit-function-declaration"
   ]);
 
diff --git a/pkgs/tools/video/atomicparsley/default.nix b/pkgs/tools/video/atomicparsley/default.nix
index 3433bde6e11a..24c11d8695d6 100644
--- a/pkgs/tools/video/atomicparsley/default.nix
+++ b/pkgs/tools/video/atomicparsley/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
 
   buildInputs = [ zlib ]
-                ++ lib.optionals stdenv.isDarwin [ Cocoa ];
+                ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ];
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/tools/video/bento4/default.nix b/pkgs/tools/video/bento4/default.nix
index 12764ad92778..5059cfa0c838 100644
--- a/pkgs/tools/video/bento4/default.nix
+++ b/pkgs/tools/video/bento4/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     "-DCMAKE_OSX_ARCHITECTURES="
   ];
 
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   '';
 
   # Patch binaries to use our dylib
-  postInstall = lib.optionalString stdenv.isDarwin ''
+  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     find $out/bin -maxdepth 1 -executable -type f -exec install_name_tool -change @rpath/libap4.dylib $out/lib/libap4.dylib {} \;
   '';
 
diff --git a/pkgs/tools/video/rtmpdump/default.nix b/pkgs/tools/video/rtmpdump/default.nix
index acb59fd21bdb..8c5942d85210 100644
--- a/pkgs/tools/video/rtmpdump/default.nix
+++ b/pkgs/tools/video/rtmpdump/default.nix
@@ -37,7 +37,7 @@ stdenv.mkDerivation {
   ]
     ++ lib.optional gnutlsSupport "CRYPTO=GNUTLS"
     ++ lib.optional opensslSupport "CRYPTO=OPENSSL"
-    ++ lib.optional stdenv.isDarwin "SYS=darwin"
+    ++ lib.optional stdenv.hostPlatform.isDarwin "SYS=darwin"
     ++ lib.optional stdenv.cc.isClang "CC=clang";
 
   propagatedBuildInputs = [ zlib ]
diff --git a/pkgs/tools/video/swfmill/default.nix b/pkgs/tools/video/swfmill/default.nix
index 9e8fea8b53a6..e7e28c09a2d8 100644
--- a/pkgs/tools/video/swfmill/default.nix
+++ b/pkgs/tools/video/swfmill/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ libxslt freetype libpng libxml2 ];
 
   # fatal error: 'libxml/xpath.h' file not found
-  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${libxml2.dev}/include/libxml2";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-I${libxml2.dev}/include/libxml2";
 
   meta = {
     description = "Xml2swf and swf2xml processor with import functionalities";
diff --git a/pkgs/tools/video/tsduck/default.nix b/pkgs/tools/video/tsduck/default.nix
index 2e91b2dc8575..0da53e2e96ea 100644
--- a/pkgs/tools/video/tsduck/default.nix
+++ b/pkgs/tools/video/tsduck/default.nix
@@ -88,6 +88,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ siriobalmelli ];
     platforms   = platforms.all;
     # never built on aarch64-darwin, x86_64-darwin since first introduction in nixpkgs
-    broken = stdenv.isDarwin;
+    broken = stdenv.hostPlatform.isDarwin;
   };
 }
diff --git a/pkgs/tools/video/yaydl/default.nix b/pkgs/tools/video/yaydl/default.nix
index e54d37b15707..83463e22c481 100644
--- a/pkgs/tools/video/yaydl/default.nix
+++ b/pkgs/tools/video/yaydl/default.nix
@@ -28,7 +28,7 @@ rustPlatform.buildRustPackage rec {
   ];
 
   buildInputs = [ openssl ]
-    ++ lib.optional stdenv.isDarwin Security;
+    ++ lib.optional stdenv.hostPlatform.isDarwin Security;
 
   postInstall = ''
     wrapProgram $out/bin/yaydl \
diff --git a/pkgs/tools/virtualization/distrobuilder/default.nix b/pkgs/tools/virtualization/distrobuilder/default.nix
index 455e6f108c88..b2927b7c5000 100644
--- a/pkgs/tools/virtualization/distrobuilder/default.nix
+++ b/pkgs/tools/virtualization/distrobuilder/default.nix
@@ -23,7 +23,7 @@ let
     gnupg
     gnutar
     squashfsTools
-  ] ++ lib.optionals stdenv.isx86_64 [
+  ] ++ lib.optionals stdenv.hostPlatform.isx86_64 [
     # repack-windows deps
     cdrkit
     hivex
diff --git a/pkgs/tools/virtualization/ovftool/default.nix b/pkgs/tools/virtualization/ovftool/default.nix
index 46e1614385bf..6df3491c085d 100644
--- a/pkgs/tools/virtualization/ovftool/default.nix
+++ b/pkgs/tools/virtualization/ovftool/default.nix
@@ -65,15 +65,15 @@ stdenv.mkDerivation {
     libxcrypt-legacy
     xercesc
     zlib
-  ] ++ lib.optionals stdenv.isLinux [
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
     glibc
-  ] ++ lib.optionals stdenv.isDarwin [
+  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     darwin.Libsystem
     libxml2
   ];
 
   nativeBuildInputs = [ unzip makeWrapper ]
-  ++ lib.optionals stdenv.isLinux [ autoPatchelfHook ];
+  ++ lib.optionals stdenv.hostPlatform.isLinux [ autoPatchelfHook ];
 
   postUnpack = ''
     # The linux package wraps ovftool.bin with ovftool. Wrapping
@@ -103,7 +103,7 @@ stdenv.mkDerivation {
     # Darwin dylibs are under `lib` in the zip.
     install -m 755 -d "$out/lib"
     install -m 644 -t "$out/lib" \
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       libcrypto.so.1.0.2 \
       libcurl.so.4 \
       libgoogleurl.so.59 \
@@ -112,7 +112,7 @@ stdenv.mkDerivation {
       libvim-types.so \
       libvmacore.so \
       libvmomi.so
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       lib/libcrypto.1.0.2.dylib \
       lib/libcurl.4.dylib \
       lib/libgoogleurl.59.0.30.45.2.dylib \
@@ -151,17 +151,17 @@ stdenv.mkDerivation {
     # Install final executable
     install -m 755 -d "$out/bin"
     makeWrapper "$out/libexec/ovftool" "$out/bin/ovftool" \
-  '' + lib.optionalString stdenv.isLinux ''
+  '' + lib.optionalString stdenv.hostPlatform.isLinux ''
       --prefix LD_LIBRARY_PATH : "$out/lib"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       --prefix DYLD_LIBRARY_PATH : "$out/lib"
   '' + ''
     runHook postInstall
   '';
 
-  preFixup = lib.optionalString stdenv.isLinux ''
+  preFixup = lib.optionalString stdenv.hostPlatform.isLinux ''
     addAutoPatchelfSearchPath "$out/lib"
-  '' + lib.optionalString stdenv.isDarwin ''
+  '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
     change_args=()
 
     # Change relative @loader_path dylibs to absolute paths.
@@ -208,7 +208,7 @@ stdenv.mkDerivation {
   '';
 
   # These paths are need for install check tests
-  propagatedSandboxProfile = lib.optionalString stdenv.isDarwin ''
+  propagatedSandboxProfile = lib.optionalString stdenv.hostPlatform.isDarwin ''
     (allow file-read* (subpath "/usr/share/locale"))
     (allow file-read* (subpath "/var/db/timezone"))
     (allow file-read* (subpath "/System/Library/TextEncodings"))
@@ -216,7 +216,7 @@ stdenv.mkDerivation {
 
   doInstallCheck = true;
 
-  postInstallCheck = lib.optionalString stdenv.isDarwin ''
+  postInstallCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
     export HOME=$TMPDIR
     # Construct a dummy /etc/passwd file - ovftool attempts to determine the
     # user's "real" home using this
diff --git a/pkgs/tools/wayland/wob/default.nix b/pkgs/tools/wayland/wob/default.nix
index d57755244a10..e670c5fce4de 100644
--- a/pkgs/tools/wayland/wob/default.nix
+++ b/pkgs/tools/wayland/wob/default.nix
@@ -30,9 +30,9 @@ stdenv.mkDerivation rec {
   ];
   nativeBuildInputs = [ meson ninja pkg-config scdoc wayland-scanner ];
   buildInputs = [ cmocka inih wayland wayland-protocols ]
-    ++ lib.optional stdenv.isLinux libseccomp;
+    ++ lib.optional stdenv.hostPlatform.isLinux libseccomp;
 
-  mesonFlags = lib.optional stdenv.isLinux "-Dseccomp=enabled";
+  mesonFlags = lib.optional stdenv.hostPlatform.isLinux "-Dseccomp=enabled";
 
   meta = with lib; {
     inherit (src.meta) homepage;
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index e50af1a6a24a..3df3d70f44c7 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -494,7 +494,7 @@ mapAliases {
   francis = kdePackages.francis; # added 2024-07-13
   fritzprofiles = throw "fritzprofiles was removed from nixpkgs, because it was removed as dependency of home-assistant for which it was pacakged."; # added 2024-01-05
   frostwire = throw "frostwire was removed, as it was broken due to reproducibility issues, use `frostwire-bin` package instead."; # added 2024-05-17
-  fuse2fs = if stdenv.isLinux then e2fsprogs.fuse2fs else null; # Added 2022-03-27 preserve, reason: convenience, arch has a package named fuse2fs too.
+  fuse2fs = if stdenv.hostPlatform.isLinux then e2fsprogs.fuse2fs else null; # Added 2022-03-27 preserve, reason: convenience, arch has a package named fuse2fs too.
   futuresql = libsForQt5.futuresql; # added 2023-11-11
   fx_cast_bridge = fx-cast-bridge; # added 2023-07-26
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 09d644f76c64..7afe4acb5f0c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -737,7 +737,7 @@ with pkgs;
   sea-orm-cli = callPackage ../development/tools/sea-orm-cli { };
 
   vcpkg-tool = callPackage ../by-name/vc/vcpkg-tool/package.nix {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     fmt = fmt_10;
   };
 
@@ -1118,7 +1118,7 @@ with pkgs;
         # So turn gssSupport off there, and on Windows.
         # On other platforms, keep the previous value.
         gssSupport =
-          if stdenv.isDarwin || stdenv.hostPlatform.isWindows
+          if stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isWindows
             then false
             else old.gssSupport or true; # `? true` is the default
         libkrb5 = buildPackages.krb5.override {
@@ -2094,7 +2094,7 @@ with pkgs;
     guiSupport = true;
     sendEmailSupport = true;
     withSsh = true;
-    withLibsecret = !stdenv.isDarwin;
+    withLibsecret = !stdenv.hostPlatform.isDarwin;
   };
 
   # Git with SVN support, but without GUI.
@@ -2144,7 +2144,7 @@ with pkgs;
   delta = darwin.apple_sdk_11_0.callPackage ../applications/version-management/delta { };
 
   debase = callPackage ../by-name/de/debase/package.nix {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   diff-so-fancy = callPackage ../applications/version-management/diff-so-fancy { };
@@ -2313,7 +2313,7 @@ with pkgs;
   git-radar = callPackage ../applications/version-management/git-radar { };
 
   git-recent = callPackage ../applications/version-management/git-recent {
-    util-linux = if stdenv.isLinux then util-linuxMinimal else util-linux;
+    util-linux = if stdenv.hostPlatform.isLinux then util-linuxMinimal else util-linux;
   };
 
   git-relevant-history = callPackage ../applications/version-management/git-relevant-history { };
@@ -2547,7 +2547,7 @@ with pkgs;
 
   dosbox = callPackage ../applications/emulators/dosbox {
     inherit (darwin.apple_sdk.frameworks ) OpenGL;
-    SDL = if stdenv.isDarwin then SDL else SDL_compat;
+    SDL = if stdenv.hostPlatform.isDarwin then SDL else SDL_compat;
   };
 
   dosbox-x = darwin.apple_sdk_11_0.callPackage ../applications/emulators/dosbox-x {
@@ -2705,7 +2705,7 @@ with pkgs;
   ### APPLICATIONS/EMULATORS/DOLPHIN-EMU
 
   dolphin-emu = qt6Packages.callPackage ../applications/emulators/dolphin-emu {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) CoreBluetooth ForceFeedback IOBluetooth IOKit OpenGL VideoToolbox;
     inherit (darwin) moltenvk;
   };
@@ -2843,7 +2843,7 @@ with pkgs;
   contour = qt6.callPackage ../applications/terminal-emulators/contour {
     inherit (darwin.apple_sdk_11_0.libs) utmp;
     inherit (darwin) sigtool;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
     catch2 = catch2_3;
     fmt = fmt_9;
   };
@@ -2863,7 +2863,7 @@ with pkgs;
   iterm2 = callPackage ../applications/terminal-emulators/iterm2 { };
 
   kitty = darwin.apple_sdk_11_0.callPackage ../applications/terminal-emulators/kitty {
-    harfbuzz = harfbuzz.override { withCoreText = stdenv.isDarwin; };
+    harfbuzz = harfbuzz.override { withCoreText = stdenv.hostPlatform.isDarwin; };
     inherit (darwin.apple_sdk_11_0) Libsystem;
     inherit (darwin.apple_sdk_11_0.frameworks)
       Cocoa
@@ -5348,7 +5348,7 @@ with pkgs;
   joystickwake = callPackage ../tools/games/joystickwake { };
 
   juce = callPackage ../development/misc/juce {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   jumppad = callPackage ../tools/virtualization/jumppad { };
@@ -6279,7 +6279,7 @@ with pkgs;
   cdrkit = callPackage ../tools/cd-dvd/cdrkit { };
 
   cdrtools = callPackage ../tools/cd-dvd/cdrtools {
-    stdenv = if stdenv.isDarwin then llvmPackages_14.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then llvmPackages_14.stdenv else stdenv;
     inherit (darwin.apple_sdk.frameworks) Carbon IOKit;
   };
 
@@ -6681,7 +6681,7 @@ with pkgs;
   ckb-next = libsForQt5.callPackage ../tools/misc/ckb-next { };
 
   clamav = callPackage ../tools/security/clamav {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) Foundation;
   };
 
@@ -7039,7 +7039,7 @@ with pkgs;
 
   dmd = callPackage ../by-name/dm/dmd/package.nix ({
     inherit (darwin.apple_sdk.frameworks) Foundation;
-  } // lib.optionalAttrs stdenv.isLinux {
+  } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
     # https://github.com/NixOS/nixpkgs/pull/206907#issuecomment-1527034123
     stdenv = gcc11Stdenv;
   });
@@ -8062,12 +8062,12 @@ with pkgs;
   gnupg1 = gnupg1compat;    # use config.packageOverrides if you prefer original gnupg1
 
   gnupg22 = callPackage ../tools/security/gnupg/22.nix {
-    pinentry = if stdenv.isDarwin then pinentry_mac else pinentry-gtk2;
+    pinentry = if stdenv.hostPlatform.isDarwin then pinentry_mac else pinentry-gtk2;
     libgcrypt = libgcrypt_1_8;
   };
 
   gnupg24 = callPackage ../tools/security/gnupg/24.nix {
-    pinentry = if stdenv.isDarwin then pinentry_mac else pinentry-gtk2;
+    pinentry = if stdenv.hostPlatform.isDarwin then pinentry_mac else pinentry-gtk2;
   };
   gnupg = gnupg24;
 
@@ -8460,7 +8460,7 @@ with pkgs;
   haste-server = callPackage ../servers/haste-server { };
 
   hal-hardware-analyzer = libsForQt5.callPackage ../applications/science/electronics/hal-hardware-analyzer {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   half = callPackage ../development/libraries/half { };
@@ -8952,7 +8952,7 @@ with pkgs;
   go-jira = callPackage ../applications/misc/go-jira { };
 
   jogl = callPackage ../by-name/jo/jogl/package.nix {
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64 then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then overrideSDK stdenv "11.0" else stdenv;
   };
 
   john = callPackage ../tools/security/john { };
@@ -9240,7 +9240,7 @@ with pkgs;
 
   libcryptui = callPackage ../development/libraries/libcryptui {
     autoreconfHook = buildPackages.autoreconfHook269;
-    gtk3 = if stdenv.isDarwin then gtk3-x11 else gtk3;
+    gtk3 = if stdenv.hostPlatform.isDarwin then gtk3-x11 else gtk3;
   };
 
   libshumate = callPackage ../development/libraries/libshumate { };
@@ -9552,7 +9552,7 @@ with pkgs;
     protobuf = protobuf_21;
   };
   netdataCloud = netdata.override {
-    withCloud = !stdenv.isDarwin;
+    withCloud = !stdenv.hostPlatform.isDarwin;
     withCloudUi = true;
   };
 
@@ -10013,7 +10013,7 @@ with pkgs;
   bubblemail = callPackage ../applications/networking/mailreaders/bubblemail { };
 
   mailpit = callPackage ../servers/mail/mailpit {
-    libtool = if stdenv.isDarwin then cctools else libtool;
+    libtool = if stdenv.hostPlatform.isDarwin then cctools else libtool;
   };
 
   mailsend = callPackage ../tools/networking/mailsend { };
@@ -11049,7 +11049,7 @@ with pkgs;
   page = callPackage ../tools/misc/page { };
 
   pageedit = libsForQt5.callPackage ../applications/office/PageEdit {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   pagefind = libsForQt5.callPackage ../applications/misc/pagefind { };
@@ -11328,7 +11328,7 @@ with pkgs;
   };
 
   platformioPackages = dontRecurseIntoAttrs (callPackage ../development/embedded/platformio { });
-  platformio = if stdenv.isLinux then platformioPackages.platformio-chrootenv else platformioPackages.platformio-core;
+  platformio = if stdenv.hostPlatform.isLinux then platformioPackages.platformio-chrootenv else platformioPackages.platformio-core;
   platformio-core = platformioPackages.platformio-core;
 
   platinum-searcher = callPackage ../tools/text/platinum-searcher { };
@@ -11505,7 +11505,7 @@ with pkgs;
 
   proxmark3 = libsForQt5.callPackage ../tools/security/proxmark3/default.nix {
     inherit (darwin.apple_sdk_11_0.frameworks) Foundation AppKit;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   proxychains = callPackage ../tools/networking/proxychains { };
@@ -11710,7 +11710,7 @@ with pkgs;
   qovery-cli = callPackage ../tools/admin/qovery-cli { };
 
   qownnotes = qt6Packages.callPackage ../applications/office/qownnotes {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   qpdf = callPackage ../development/libraries/qpdf { };
@@ -11741,7 +11741,7 @@ with pkgs;
 
   raider = callPackage ../applications/misc/raider { };
 
-  quota = if stdenv.isLinux then linuxquota else unixtools.quota;
+  quota = if stdenv.hostPlatform.isLinux then linuxquota else unixtools.quota;
 
   qvge = libsForQt5.callPackage ../applications/graphics/qvge { };
 
@@ -12455,7 +12455,7 @@ with pkgs;
 
   snapcast = darwin.apple_sdk_11_0.callPackage ../applications/audio/snapcast {
     inherit (darwin.apple_sdk_11_0.frameworks) IOKit AudioToolbox;
-    pulseaudioSupport = config.pulseaudio or stdenv.isLinux;
+    pulseaudioSupport = config.pulseaudio or stdenv.hostPlatform.isLinux;
   };
 
   snapdragon-profiler = callPackage ../tools/graphics/snapdragon-profiler { };
@@ -12469,7 +12469,7 @@ with pkgs;
   snort = callPackage ../applications/networking/ids/snort { };
 
   soapui = callPackage ../applications/networking/soapui {
-    jdk = if stdenv.isDarwin
+    jdk = if stdenv.hostPlatform.isDarwin
       then (jdk11.override { enableJavaFX = true; })
       else jdk11;
   };
@@ -12911,7 +12911,7 @@ with pkgs;
   tewisay = callPackage ../tools/misc/tewisay { };
 
   texmacs = libsForQt5.callPackage ../applications/editors/texmacs {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
     extraFonts = true;
   };
 
@@ -13602,7 +13602,7 @@ with pkgs;
   wasm-tools = callPackage ../tools/misc/wasm-tools { };
 
   wasmedge = callPackage ../development/tools/wasmedge {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else llvmPackages.stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else llvmPackages.stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) Foundation;
   };
 
@@ -14569,7 +14569,7 @@ with pkgs;
   #Use this instead of stdenv to build with clang
   clangStdenv = if stdenv.cc.isClang then stdenv else lowPrio llvmPackages.stdenv;
   clang-sierraHack-stdenv = overrideCC stdenv buildPackages.clang-sierraHack;
-  libcxxStdenv = if stdenv.isDarwin then stdenv else lowPrio llvmPackages.libcxxStdenv;
+  libcxxStdenv = if stdenv.hostPlatform.isDarwin then stdenv else lowPrio llvmPackages.libcxxStdenv;
 
   clean = callPackage ../development/compilers/clean { };
 
@@ -14658,7 +14658,7 @@ with pkgs;
   apache-flex-sdk = callPackage ../development/compilers/apache-flex-sdk { };
 
   fasm = pkgsi686Linux.callPackage ../development/compilers/fasm {
-    inherit (stdenv) isx86_64;
+    inherit (stdenv.hostPlatform) isx86_64;
   };
   fasm-bin = callPackage ../development/compilers/fasm/bin.nix { };
 
@@ -14811,7 +14811,7 @@ with pkgs;
         reproducibleBuild = true;
         profiledCompiler = false;
 
-        isl = if !stdenv.isDarwin then isl_0_20 else null;
+        isl = if !stdenv.hostPlatform.isDarwin then isl_0_20 else null;
 
         withoutTargetLibc = true;
         langCC = false;
@@ -15725,7 +15725,7 @@ with pkgs;
   };
   cargo-codspeed = callPackage ../development/tools/rust/cargo-codspeed {
     rustPlatform = makeRustPlatform {
-      stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+      stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
       inherit rustc cargo;
     };
   };
@@ -17202,7 +17202,7 @@ with pkgs;
     inherit (darwin.apple_sdk_11_0.frameworks) CoreFoundation CoreServices Foundation;
     buildJdk = jdk11_headless;
     runJdk = jdk11_headless;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv
       else if stdenv.cc.isClang then llvmPackages.stdenv
       else if stdenv.cc.isGNU then gcc12Stdenv
       else stdenv;
@@ -17214,7 +17214,7 @@ with pkgs;
     inherit (darwin.apple_sdk_11_0.frameworks) CoreFoundation CoreServices Foundation IOKit;
     buildJdk = jdk17_headless;
     runJdk = jdk17_headless;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv
       else if stdenv.cc.isClang then llvmPackages.stdenv
       else stdenv;
     bazel_self = bazel_7;
@@ -17663,7 +17663,7 @@ with pkgs;
     wrapCC (distcc.links extraConfig)) { };
   distccStdenv = lowPrio (overrideCC stdenv buildPackages.distccWrapper);
 
-  distccMasquerade = if stdenv.isDarwin
+  distccMasquerade = if stdenv.hostPlatform.isDarwin
     then null
     else callPackage ../development/tools/misc/distcc/masq.nix {
       gccRaw = gcc.cc;
@@ -18221,7 +18221,7 @@ with pkgs;
   modd = callPackage ../development/tools/modd { };
 
   mold = callPackage ../by-name/mo/mold/package.nix {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     tbb = tbb_2021_11;
   };
 
@@ -18722,7 +18722,7 @@ with pkgs;
   c2ffi = callPackage ../development/tools/misc/c2ffi { };
 
   c0 = callPackage ../development/compilers/c0 {
-    stdenv = if stdenv.isDarwin then gccStdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then gccStdenv else stdenv;
   };
 
   c3c = callPackage ../development/compilers/c3c { };
@@ -18981,25 +18981,25 @@ with pkgs;
 
   abseil-cpp_202103 = callPackage ../development/libraries/abseil-cpp/202103.nix {
     # If abseil-cpp doesn’t have a deployment target of 10.13+, arrow-cpp crashes in libgrpc.dylib.
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
       then overrideSDK stdenv { darwinMinVersion = "10.13"; }
       else stdenv;
   };
   abseil-cpp_202301 = callPackage ../development/libraries/abseil-cpp/202301.nix {
     # If abseil-cpp doesn’t have a deployment target of 10.13+, arrow-cpp crashes in libgrpc.dylib.
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
       then overrideSDK stdenv { darwinMinVersion = "10.13"; }
       else stdenv;
   };
   abseil-cpp_202401 = callPackage ../development/libraries/abseil-cpp/202401.nix {
     # If abseil-cpp doesn’t have a deployment target of 10.13+, arrow-cpp crashes in libgrpc.dylib.
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
       then overrideSDK stdenv { darwinMinVersion = "10.13"; }
       else stdenv;
   };
   abseil-cpp_202407 = callPackage ../development/libraries/abseil-cpp/202407.nix {
      # If abseil-cpp doesn’t have a deployment target of 10.13+, arrow-cpp crashes in libgrpc.dylib.
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
       then overrideSDK stdenv { darwinMinVersion = "10.13"; }
       else stdenv;
   };
@@ -19448,7 +19448,7 @@ with pkgs;
 
   ustream-ssl-mbedtls = callPackage ../development/libraries/ustream-ssl {
     ssl_implementation = mbedtls_2;
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   uri = callPackage ../development/libraries/uri { };
@@ -19581,7 +19581,7 @@ with pkgs;
 
   eccodes = callPackage ../development/libraries/eccodes {
     pythonPackages = python3Packages;
-    stdenv = if stdenv.isDarwin then gccStdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then gccStdenv else stdenv;
   };
 
   eclib = callPackage ../development/libraries/eclib { };
@@ -19930,7 +19930,7 @@ with pkgs;
   ghcid = haskellPackages.ghcid.bin;
 
   gr-framework = callPackage ../by-name/gr/gr-framework/package.nix {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   graphia = qt6Packages.callPackage ../applications/science/misc/graphia { };
@@ -20143,7 +20143,7 @@ with pkgs;
   grilo-plugins = callPackage ../development/libraries/grilo-plugins { };
 
   grpc = darwin.apple_sdk_11_0.callPackage ../development/libraries/grpc {
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64
       then overrideSDK darwin.apple_sdk_11_0.stdenv { darwinMinVersion = "10.13"; }
       else stdenv;
   };
@@ -20251,7 +20251,7 @@ with pkgs;
   };
 
   pango = callPackage ../development/libraries/pango {
-    harfbuzz = harfbuzz.override { withCoreText = stdenv.isDarwin; };
+    harfbuzz = harfbuzz.override { withCoreText = stdenv.hostPlatform.isDarwin; };
   };
 
   pangolin = callPackage ../development/libraries/pangolin {
@@ -20380,7 +20380,7 @@ with pkgs;
   };
 
   harfbuzzFull = harfbuzz.override {
-    withCoreText = stdenv.isDarwin;
+    withCoreText = stdenv.hostPlatform.isDarwin;
     withGraphite2 = true;
     withIcu = true;
   };
@@ -20489,7 +20489,7 @@ with pkgs;
   ilmbase = callPackage ../development/libraries/ilmbase { };
 
   imgui = callPackage ../development/libraries/imgui {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   imtui = callPackage ../development/libraries/imtui { };
@@ -20504,8 +20504,8 @@ with pkgs;
   imlib2Full = imlib2.override {
     # Compilation error on Darwin with librsvg. For more information see:
     # https://github.com/NixOS/nixpkgs/pull/166452#issuecomment-1090725613
-    svgSupport = !stdenv.isDarwin;
-    heifSupport = !stdenv.isDarwin;
+    svgSupport = !stdenv.hostPlatform.isDarwin;
+    heifSupport = !stdenv.hostPlatform.isDarwin;
     webpSupport = true;
     jxlSupport = true;
     psSupport = true;
@@ -20549,7 +20549,7 @@ with pkgs;
 
   ip2location-c = callPackage ../development/libraries/ip2location-c { };
 
-  irrlicht = if !stdenv.isDarwin then
+  irrlicht = if !stdenv.hostPlatform.isDarwin then
     callPackage ../development/libraries/irrlicht { }
   else callPackage ../development/libraries/irrlicht/mac.nix {
     inherit (darwin.apple_sdk.frameworks) Cocoa OpenGL IOKit;
@@ -20644,7 +20644,7 @@ with pkgs;
 
   libjodycode = callPackage ../development/libraries/libjodycode {
     # missing aligned_alloc()
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   libb64 = callPackage ../development/libraries/libb64 { };
@@ -20661,7 +20661,7 @@ with pkgs;
   };
 
   keybinder3 = callPackage ../development/libraries/keybinder3 {
-    gtk3 = if stdenv.isDarwin then gtk3-x11 else gtk3;
+    gtk3 = if stdenv.hostPlatform.isDarwin then gtk3-x11 else gtk3;
     automake = automake111x;
   };
 
@@ -21205,7 +21205,7 @@ with pkgs;
   libfabric = callPackage ../development/libraries/libfabric { };
 
   libfive = libsForQt5.callPackage ../development/libraries/libfive {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     python = python3;
   };
 
@@ -21926,7 +21926,7 @@ with pkgs;
   };
 
   libunwind =
-    if stdenv.isDarwin then darwin.libunwind
+    if stdenv.hostPlatform.isDarwin then darwin.libunwind
     else if stdenv.hostPlatform.system == "riscv32-linux" then llvmPackages.libunwind
     else callPackage ../development/libraries/libunwind { };
 
@@ -22275,7 +22275,7 @@ with pkgs;
     else
       freeglut;
 
-  mesa = if stdenv.isDarwin
+  mesa = if stdenv.hostPlatform.isDarwin
     then darwin.apple_sdk_11_0.callPackage ../development/libraries/mesa/darwin.nix {
       inherit (darwin.apple_sdk_11_0.libs) Xplugin;
     }
@@ -22322,7 +22322,7 @@ with pkgs;
   minizip-ng = callPackage ../development/libraries/minizip-ng { };
 
   mkvtoolnix = qt6Packages.callPackage ../applications/video/mkvtoolnix {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   mkvtoolnix-cli = mkvtoolnix.override {
@@ -22724,7 +22724,7 @@ with pkgs;
   pcg_c = callPackage ../development/libraries/pcg-c { };
 
   pcl = libsForQt5.callPackage ../development/libraries/pcl {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) Cocoa AGL OpenGL;
   };
 
@@ -22911,7 +22911,7 @@ with pkgs;
         darwin;
       inherit (__splicedPackages.gst_all_1) gstreamer gst-plugins-base;
       inherit config;
-      stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+      stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     });
 
   libsForQt5 = (recurseIntoAttrs (import ./qt5-packages.nix {
@@ -22928,7 +22928,7 @@ with pkgs;
 
   qt6Packages = recurseIntoAttrs (import ./qt6-packages.nix {
     inherit lib __splicedPackages makeScopeWithSplicing' generateSplicesForMkScope pkgsHostTarget kdePackages;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   });
 
   quark-engine = callPackage ../tools/security/quark-engine { };
@@ -23633,7 +23633,7 @@ with pkgs;
   ucommon = callPackage ../development/libraries/ucommon { };
 
   v8 = callPackage ../development/libraries/v8 {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   intel-vaapi-driver = callPackage ../development/libraries/intel-vaapi-driver { };
@@ -24458,7 +24458,7 @@ with pkgs;
 
   directx-shader-compiler = callPackage ../tools/graphics/directx-shader-compiler {
     # https://github.com/NixOS/nixpkgs/issues/216294
-    stdenv = if stdenv.cc.isGNU && stdenv.isi686 then gcc11Stdenv else stdenv;
+    stdenv = if stdenv.cc.isGNU && stdenv.hostPlatform.isi686 then gcc11Stdenv else stdenv;
   };
 
   dkimproxy = callPackage ../servers/mail/dkimproxy { };
@@ -25051,7 +25051,7 @@ with pkgs;
     sasl = cyrus_sasl;
     boost = boost178.override { enableShared = false; };
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
-    stdenv = if stdenv.isDarwin then
+    stdenv = if stdenv.hostPlatform.isDarwin then
       darwin.apple_sdk_11_0.stdenv.override (old: {
         hostPlatform = old.hostPlatform // { darwinMinVersion = "10.14"; };
         buildPlatform = old.buildPlatform // { darwinMinVersion = "10.14"; };
@@ -25159,7 +25159,7 @@ with pkgs;
     httpSupport = true;
     tpmSupport = true;
     tlsSupport = true;
-    msVarsTemplate = stdenv.isx86_64 || stdenv.isAarch64;
+    msVarsTemplate = stdenv.hostPlatform.isx86_64 || stdenv.hostPlatform.isAarch64;
   };
 
   ops = callPackage ../applications/virtualization/ops { };
@@ -25426,7 +25426,7 @@ with pkgs;
   check-wmiplus = callPackage ../servers/monitoring/plugins/wmiplus { };
 
   shishi = callPackage ../servers/shishi {
-      pam = if stdenv.isLinux then pam else null;
+      pam = if stdenv.hostPlatform.isLinux then pam else null;
       # see also openssl, which has/had this same trick
   };
 
@@ -25580,8 +25580,8 @@ with pkgs;
       inherit (darwin.apple_sdk.frameworks) ApplicationServices Carbon Cocoa;
       inherit (darwin.apple_sdk.libs) Xplugin;
       inherit (buildPackages.darwin) bootstrap_cmds;
-      udev = if stdenv.isLinux then udev else null;
-      libdrm = if stdenv.isLinux then libdrm else null;
+      udev = if stdenv.hostPlatform.isLinux then udev else null;
+      libdrm = if stdenv.hostPlatform.isLinux then libdrm else null;
     };
 
     generatedPackages = lib.callPackageWith __splicedPackages ../servers/x11/xorg/default.nix { };
@@ -25853,7 +25853,7 @@ with pkgs;
 
   libossp_uuid = callPackage ../development/libraries/libossp-uuid { };
 
-  libuuid = if stdenv.isLinux
+  libuuid = if stdenv.hostPlatform.isLinux
     then util-linuxMinimal
     else null;
 
@@ -25899,7 +25899,7 @@ with pkgs;
     util-linux = util-linuxMinimal;
   });
   fuse = fuse2;
-  fuse2 = lowPrio (if stdenv.isDarwin then macfuse-stubs else fusePackages.fuse_2);
+  fuse2 = lowPrio (if stdenv.hostPlatform.isDarwin then macfuse-stubs else fusePackages.fuse_2);
   fuse3 = fusePackages.fuse_3;
   fuse-common = hiPrio fusePackages.fuse_3.common;
 
@@ -26341,7 +26341,7 @@ with pkgs;
     inherit (darwin.apple_sdk_11_0.frameworks) IOKit CoreFoundation Foundation;
   });
 
-  nettools = if stdenv.isLinux
+  nettools = if stdenv.hostPlatform.isLinux
     then callPackage ../os-specific/linux/net-tools { }
     else unixtools.nettools;
 
@@ -26505,7 +26505,7 @@ with pkgs;
 
   pagemon = callPackage ../os-specific/linux/pagemon { };
 
-  pam = if stdenv.isLinux then linux-pam else openpam;
+  pam = if stdenv.hostPlatform.isLinux then linux-pam else openpam;
 
   # pam_bioapi ( see http://www.thinkwiki.org/wiki/How_to_enable_the_fingerprint_reader )
 
@@ -26579,7 +26579,7 @@ with pkgs;
 
   pps-tools = callPackage ../os-specific/linux/pps-tools { };
 
-  procps = if stdenv.isLinux
+  procps = if stdenv.hostPlatform.isLinux
     then callPackage ../os-specific/linux/procps-ng { }
     else unixtools.procps;
 
@@ -26669,7 +26669,7 @@ with pkgs;
   sdparm = callPackage ../os-specific/linux/sdparm { };
 
   sdrangel = libsForQt5.callPackage ../applications/radio/sdrangel {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   setools = callPackage ../os-specific/linux/setools { };
@@ -28228,7 +28228,7 @@ with pkgs;
   dcw-gmt = callPackage ../applications/gis/gmt/dcw.nix { };
 
   grass = callPackage ../applications/gis/grass {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   qgis-ltr = callPackage ../applications/gis/qgis/ltr.nix { };
@@ -28966,7 +28966,7 @@ with pkgs;
   darktable = callPackage ../by-name/da/darktable/package.nix {
     lua = lua5_4;
     pugixml = pugixml.override { shared = true; };
-    stdenv = if stdenv.isDarwin && stdenv.isx86_64 then overrideSDK llvmPackages_18.stdenv { darwinMinVersion = "10.14"; darwinSdkVersion = "11.0"; } else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64 then overrideSDK llvmPackages_18.stdenv { darwinMinVersion = "10.14"; darwinSdkVersion = "11.0"; } else stdenv;
   };
 
   das_watchdog = callPackage ../tools/system/das_watchdog { };
@@ -29327,7 +29327,7 @@ with pkgs;
 
   keepassxc = libsForQt5.callPackage ../applications/misc/keepassxc {
     inherit (darwin.apple_sdk_11_0.frameworks) LocalAuthentication;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   keepass-diff = callPackage ../applications/misc/keepass-diff { };
@@ -29540,7 +29540,7 @@ with pkgs;
       inherit (darwin.apple_sdk.frameworks) CoreAudio;
       python = python311;
       volk = volk_2;
-    } // lib.optionalAttrs stdenv.isLinux {
+    } // lib.optionalAttrs stdenv.hostPlatform.isLinux {
       stdenv = pkgs.stdenvAdapters.useLibsFrom stdenv pkgs.gcc12Stdenv;
     });
   };
@@ -29658,7 +29658,7 @@ with pkgs;
 
   wireshark = qt6Packages.callPackage ../applications/networking/sniffers/wireshark {
     inherit (darwin.apple_sdk_11_0.frameworks) ApplicationServices SystemConfiguration;
-    libpcap = libpcap.override { withBluez = stdenv.isLinux; };
+    libpcap = libpcap.override { withBluez = stdenv.hostPlatform.isLinux; };
   };
   wireshark-qt = wireshark;
 
@@ -29667,7 +29667,7 @@ with pkgs;
   tshark = wireshark-cli;
   wireshark-cli = wireshark.override {
     withQt = false;
-    libpcap = libpcap.override { withBluez = stdenv.isLinux; };
+    libpcap = libpcap.override { withBluez = stdenv.hostPlatform.isLinux; };
   };
 
   sngrep = callPackage ../applications/networking/sniffers/sngrep { };
@@ -29837,7 +29837,7 @@ with pkgs;
         inherit (gst_all_1) gstreamer gst-plugins-base gst-plugins-good;
       };
       freerdp3 = callPackage ../applications/networking/remote/freerdp/3.nix {
-        stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+        stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
         inherit (darwin.apple_sdk.frameworks) AudioToolbox AVFoundation Carbon Cocoa CoreMedia;
       };
     })
@@ -29925,9 +29925,9 @@ with pkgs;
   lemonade = callPackage ../applications/misc/lemonade { };
 
   librespot = callPackage ../applications/audio/librespot {
-    withALSA = stdenv.isLinux;
-    withPulseAudio = config.pulseaudio or stdenv.isLinux;
-    withPortAudio = stdenv.isDarwin;
+    withALSA = stdenv.hostPlatform.isLinux;
+    withPulseAudio = config.pulseaudio or stdenv.hostPlatform.isLinux;
+    withPortAudio = stdenv.hostPlatform.isDarwin;
   };
 
   limesctl = callPackage ../applications/misc/limesctl { };
@@ -30359,7 +30359,7 @@ with pkgs;
   waylevel = callPackage ../tools/misc/waylevel { };
 
   i3 = callPackage ../applications/window-managers/i3 {
-    xcb-util-cursor = if stdenv.isDarwin then xcb-util-cursor-HEAD else xcb-util-cursor;
+    xcb-util-cursor = if stdenv.hostPlatform.isDarwin then xcb-util-cursor-HEAD else xcb-util-cursor;
   };
 
   i3-auto-layout = callPackage ../applications/window-managers/i3/auto-layout.nix { };
@@ -30763,7 +30763,7 @@ with pkgs;
   kondo = callPackage ../applications/misc/kondo { };
 
   kotatogram-desktop = kdePackages.callPackage ../applications/networking/instant-messengers/telegram/kotatogram-desktop {
-    stdenv = if stdenv.isDarwin
+    stdenv = if stdenv.hostPlatform.isDarwin
       then overrideSDK stdenv "11.0"
       else stdenv;
   };
@@ -30949,7 +30949,7 @@ with pkgs;
   ladspa-sdk = callPackage ../applications/audio/ladspa-sdk { };
 
   ladybird = callPackage ../applications/networking/browsers/ladybird {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) AppKit Cocoa Foundation OpenGL;
   };
 
@@ -31535,7 +31535,7 @@ with pkgs;
   } // (config.mplayer or {}));
 
   mpv-unwrapped = darwin.apple_sdk_11_0.callPackage ../applications/video/mpv {
-    stdenv = if stdenv.isDarwin then swiftPackages.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then swiftPackages.stdenv else stdenv;
     inherit lua;
   };
 
@@ -31879,10 +31879,10 @@ with pkgs;
   ncspot = callPackage ../applications/audio/ncspot {
     inherit (darwin.apple_sdk.frameworks) Cocoa;
 
-    withALSA = stdenv.isLinux;
-    withPulseAudio = config.pulseaudio or stdenv.isLinux;
-    withPortAudio = stdenv.isDarwin;
-    withMPRIS = stdenv.isLinux;
+    withALSA = stdenv.hostPlatform.isLinux;
+    withPulseAudio = config.pulseaudio or stdenv.hostPlatform.isLinux;
+    withPortAudio = stdenv.hostPlatform.isDarwin;
+    withMPRIS = stdenv.hostPlatform.isLinux;
   };
 
   ncview = callPackage ../tools/X11/ncview { } ;
@@ -32189,7 +32189,7 @@ with pkgs;
   phantomsocks = callPackage ../tools/networking/phantomsocks { };
 
   photoqt = callPackage ../by-name/ph/photoqt/package.nix {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   photoflare = libsForQt5.callPackage ../applications/graphics/photoflare { };
@@ -32453,7 +32453,7 @@ with pkgs;
   quantomatic = callPackage ../applications/science/physics/quantomatic { };
 
   quassel = libsForQt5.callPackage ../applications/networking/irc/quassel {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   quasselClient = quassel.override {
@@ -32603,7 +32603,7 @@ with pkgs;
 
   ries = callPackage ../applications/science/math/ries { };
 
-  ripcord = if stdenv.isLinux then
+  ripcord = if stdenv.hostPlatform.isLinux then
     qt5.callPackage ../applications/networking/instant-messengers/ripcord { }
   else
     callPackage ../applications/networking/instant-messengers/ripcord/darwin.nix { };
@@ -32910,7 +32910,7 @@ with pkgs;
     # Build with clang even on Linux, because GCC uses absolutely obscene amounts of memory
     # on this particular code base (OOM with 32GB memory and --cores 16 on GCC, succeeds
     # with --cores 32 on clang).
-    stdenv = if stdenv.isDarwin then overrideSDK llvmPackages.stdenv "11.0" else llvmPackages.stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK llvmPackages.stdenv "11.0" else llvmPackages.stdenv;
   };
 
   super-slicer = darwin.apple_sdk_11_0.callPackage ../applications/misc/prusa-slicer/super-slicer.nix { };
@@ -33095,7 +33095,7 @@ with pkgs;
   };
 
   synergy = libsForQt5.callPackage ../applications/misc/synergy {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) ApplicationServices Carbon Cocoa CoreServices ScreenSaver UserNotifications;
   };
 
@@ -33160,7 +33160,7 @@ with pkgs;
   taskopen = callPackage ../applications/misc/taskopen { };
 
   telegram-desktop = qt6Packages.callPackage ../applications/networking/instant-messengers/telegram/telegram-desktop {
-    stdenv = if stdenv.isDarwin
+    stdenv = if stdenv.hostPlatform.isDarwin
       then overrideSDK stdenv "11.0"
       else stdenv;
   };
@@ -33477,7 +33477,7 @@ with pkgs;
   ueberzug = with python3Packages; toPythonApplication ueberzug;
 
   ueberzugpp = callPackage ../by-name/ue/ueberzugpp/package.nix {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   uefi-run = callPackage ../tools/virtualization/uefi-run { };
@@ -33887,7 +33887,7 @@ with pkgs;
   };
 
   chatterino2 = callPackage ../applications/networking/instant-messengers/chatterino2 {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   weston = callPackage ../applications/window-managers/weston { };
@@ -34109,7 +34109,7 @@ with pkgs;
   };
 
   xpdf = libsForQt5.callPackage ../applications/misc/xpdf {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
   };
 
   xplugd = callPackage ../tools/X11/xplugd { };
@@ -34361,7 +34361,7 @@ with pkgs;
   balanceofsatoshis = callPackage ../tools/misc/balanceofsatoshis { };
 
   bitcoin  = libsForQt5.callPackage ../applications/blockchains/bitcoin {
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
     withGui = true;
     inherit (darwin) autoSignDarwinBinariesHook;
   };
@@ -34672,7 +34672,7 @@ with pkgs;
   keeperrl = callPackage ../games/keeperrl { };
 
   shipwright = callPackage ../games/shipwright {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
   };
 
   wipeout-rewrite = callPackage ../games/wipeout-rewrite {
@@ -34874,7 +34874,7 @@ with pkgs;
   bsdgames = callPackage ../games/bsdgames { };
 
   bugdom = callPackage ../games/bugdom {
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) IOKit Foundation OpenGL;
   };
 
@@ -35326,7 +35326,7 @@ with pkgs;
 
   mudlet = libsForQt5.callPackage ../games/mudlet {
     lua = lua5_1;
-    stdenv = if stdenv.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then darwin.apple_sdk_11_0.stdenv else stdenv;
     inherit (darwin.apple_sdk_11_0.frameworks) AppKit;
   };
 
@@ -36539,7 +36539,7 @@ with pkgs;
 
   or-tools = callPackage ../development/libraries/science/math/or-tools {
     inherit (darwin) DarwinTools;
-    stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
     python = python3;
     protobuf = protobuf_23;
     # or-tools builds with -std=c++20, so abseil-cpp must
@@ -38121,7 +38121,7 @@ with pkgs;
   pwntools = with python3Packages; toPythonApplication pwntools;
 
   putty = callPackage ../applications/networking/remote/putty {
-    gtk3 = if stdenv.isDarwin then gtk3-x11 else gtk3;
+    gtk3 = if stdenv.hostPlatform.isDarwin then gtk3-x11 else gtk3;
   };
 
   qMasterPassword = qt6Packages.callPackage ../applications/misc/qMasterPassword { };
@@ -38572,7 +38572,7 @@ with pkgs;
   winePackagesFor = wineBuild: lib.makeExtensible (self: with self; {
     callPackage = newScope self;
     stdenv =
-      if pkgs.stdenv.isDarwin then
+      if pkgs.stdenv.hostPlatform.isDarwin then
         # Match upstream, which builds with the latest SDK and a 10.7 deployment target.
         overrideSDK pkgs.stdenv {
           darwinMinVersion = "10.7";
diff --git a/pkgs/top-level/emscripten-packages.nix b/pkgs/top-level/emscripten-packages.nix
index f4d2fd06a90c..af4f2fa7f1cd 100644
--- a/pkgs/top-level/emscripten-packages.nix
+++ b/pkgs/top-level/emscripten-packages.nix
@@ -67,8 +67,8 @@ rec {
         set -x
         emcc -O2 -s EMULATE_FUNCTION_POINTER_CASTS=1 xmllint.o \
         ./.libs/''
-      + pkgs.lib.optionalString pkgs.stdenv.isDarwin "libxml2.dylib "
-      + pkgs.lib.optionalString (!pkgs.stdenv.isDarwin) "libxml2.a "
+      + pkgs.lib.optionalString pkgs.stdenv.hostPlatform.isDarwin "libxml2.dylib "
+      + pkgs.lib.optionalString (!pkgs.stdenv.hostPlatform.isDarwin) "libxml2.a "
       + '' `pkg-config zlib --cflags` `pkg-config zlib --libs` -o ./xmllint.test.js \
         --embed-file ./test/xmlid/id_err1.xml
 
@@ -175,7 +175,7 @@ rec {
         echo "================= /testing zlib using node ================="
       '';
 
-      postPatch = pkgs.lib.optionalString pkgs.stdenv.isDarwin ''
+      postPatch = pkgs.lib.optionalString pkgs.stdenv.hostPlatform.isDarwin ''
         substituteInPlace configure \
           --replace '/usr/bin/libtool' 'ar' \
           --replace 'AR="libtool"' 'AR="ar"' \
diff --git a/pkgs/top-level/java-packages.nix b/pkgs/top-level/java-packages.nix
index 82022f25613b..5b72824f1d7f 100644
--- a/pkgs/top-level/java-packages.nix
+++ b/pkgs/top-level/java-packages.nix
@@ -13,7 +13,7 @@ in {
 
   compiler = let
     mkOpenjdk = path-linux: path-darwin: args:
-      if stdenv.isLinux
+      if stdenv.hostPlatform.isLinux
       then mkOpenjdkLinuxOnly path-linux args
       else let
         openjdk = callPackage path-darwin {};
@@ -21,7 +21,7 @@ in {
 
     mkOpenjdkLinuxOnly = path-linux: args: let
       openjdk = callPackage path-linux (args);
-    in assert stdenv.isLinux; openjdk // {
+    in assert stdenv.hostPlatform.isLinux; openjdk // {
       headless = openjdk.override { headless = true; };
     };
 
@@ -71,13 +71,13 @@ in {
       };
 
     temurin-bin = recurseIntoAttrs (callPackage (
-      if stdenv.isLinux
+      if stdenv.hostPlatform.isLinux
       then ../development/compilers/temurin-bin/jdk-linux.nix
       else ../development/compilers/temurin-bin/jdk-darwin.nix
     ) {});
 
     semeru-bin = recurseIntoAttrs (callPackage (
-      if stdenv.isLinux
+      if stdenv.hostPlatform.isLinux
       then ../development/compilers/semeru-bin/jdk-linux.nix
       else ../development/compilers/semeru-bin/jdk-darwin.nix
     ) {});
diff --git a/pkgs/top-level/lua-packages.nix b/pkgs/top-level/lua-packages.nix
index 3eafa2fa782f..6f62f2dee8ec 100644
--- a/pkgs/top-level/lua-packages.nix
+++ b/pkgs/top-level/lua-packages.nix
@@ -76,8 +76,8 @@ rec {
     # The makefile tries to link to `-llua<luaversion>`
     LUA_LIBS = "-llua";
 
-    buildInputs = lib.optionals stdenv.isLinux [linux-pam]
-      ++ lib.optionals stdenv.isDarwin [openpam];
+    buildInputs = lib.optionals stdenv.hostPlatform.isLinux [linux-pam]
+      ++ lib.optionals stdenv.hostPlatform.isDarwin [openpam];
 
     installPhase = ''
       runHook preInstall
@@ -163,7 +163,7 @@ rec {
     '';
 
     meta = with lib; {
-      broken = stdenv.isDarwin;
+      broken = stdenv.hostPlatform.isDarwin;
       description = "Lightweight UNIX I/O and POSIX binding for Lua";
       homepage = "https://www.gitano.org.uk/luxio/";
       license = licenses.mit;
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 3baab5aeb196..56bfd093fdd4 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -100,9 +100,9 @@ with self; {
 
     outputs = [ "out" "man" ];
 
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [ FileNext ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/ack
     '';
 
@@ -341,7 +341,7 @@ with self; {
     meta = {
       description = "Gumbo parser library";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.AlienLibGumbo.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.AlienLibGumbo.x86_64-darwin
     };
   };
 
@@ -680,7 +680,7 @@ with self; {
 
     # Fails because /etc/protocols is not available in sandbox and make
     # getprotobyname('tcp') in ApacheTest fail.
-    doCheck = !stdenv.isLinux;
+    doCheck = !stdenv.hostPlatform.isLinux;
 
     meta = {
       description = "Perl Authentication and Authorization via cookies";
@@ -868,8 +868,8 @@ with self; {
     };
     buildInputs = [ ModuleBuildTiny ];
     propagatedBuildInputs = [ CPAN02PackagesSearch CPANCommonIndex CPANDistnameInfo ClassTiny CommandRunner ExtUtilsInstall ExtUtilsInstallPaths FileCopyRecursive Filepushd HTTPTinyish MenloLegacy Modulecpmfile ModuleCPANfile ParsePMFile ParallelPipes locallib ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/cpm
     '';
     meta = {
@@ -905,8 +905,8 @@ with self; {
     };
     buildInputs = [ ObjectPad ];
     propagatedBuildInputs = [ AppPackager FileLoadLines FileHomeDir IOString ImageInfo PDFAPI2 StringInterpolateNamed TextLayout ]
-      ++ lib.optionals (!stdenv.isDarwin) [ Wx ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+      ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ Wx ];
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
 
     # Delete tests that fail when version env var is set, see
     # https://github.com/ChordPro/chordpro/issues/293
@@ -914,7 +914,7 @@ with self; {
       rm t/320_subst.t t/321_subst.t t/322_subst.t
     '';
 
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/chordpro
       rm $out/bin/wxchordpro # Wx not supported on darwin
     '';
@@ -1334,7 +1334,7 @@ with self; {
       url = "mirror://cpan/authors/id/Z/ZE/ZEFRAM/Authen-DecHpwd-2.007.tar.gz";
       hash = "sha256-9DqTuwK0H3Mn2S+eljtpUF9nNQpS6PUHlvmK/E+z8Xc=";
     };
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     propagatedBuildInputs = [ DataInteger DigestCRC ScalarString ];
     meta = {
       description = "DEC VMS password hashing";
@@ -1647,7 +1647,7 @@ with self; {
     '';
     buildInputs =[ ExtUtilsMakeMaker ];
     propagatedBuildInputs = [ pkgs.zbar PerlMagick ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Perl interface to the ZBar Barcode Reader";
       homepage = "https://metacpan.org/pod/Barcode::ZBar";
@@ -2490,7 +2490,7 @@ with self; {
     };
     propagatedBuildInputs = [ perlldap CatalystPluginAuthentication ClassAccessor ];
     buildInputs = [ TestMockObject TestException NetLDAPServerTest ];
-    doCheck = !stdenv.isDarwin; # t/02-realms_api.t and t/50.auth.case.sensitivity.t
+    doCheck = !stdenv.hostPlatform.isDarwin; # t/02-realms_api.t and t/50.auth.case.sensitivity.t
     meta = {
       description = "Authenticate Users against LDAP Directories";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -3968,7 +3968,7 @@ with self; {
     # Mac OS error -4960 (coreFoundationUnknownErr): The unknown error at lib/Clipboard/MacPasteboard.pm line 3.
     # Mac-Pasteboard-0.009.readme: 'NOTE that Mac OS X appears to restrict pasteboard access to processes that are logged in interactively.
     #     Ssh sessions and cron jobs can not create the requisite pasteboard handles, giving coreFoundationUnknownErr (-4960)'
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Copy and paste with any OS";
       homepage = "https://metacpan.org/release/Clipboard";
@@ -4197,7 +4197,7 @@ with self; {
       EOF
     '';
 
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
 
     meta = {
       description = "Low-Level Interface to zlib or zlib-ng compression library";
@@ -4762,9 +4762,9 @@ with self; {
       url = "mirror://cpan/authors/id/R/RJ/RJBS/CPAN-Mini-1.111017.tar.gz";
       hash = "sha256-8gQpO+JqyEGsyHBEoYjbD1kegIgTFseiiK7A7s4wYVU=";
     };
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [ FileHomeDir LWPProtocolHttps ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/minicpan
     '';
 
@@ -5100,7 +5100,7 @@ with self; {
       hash = "sha256-PMcSbVhBEHI3qb4txcf7wWfPPEtM40Z4qESLhQdXAUw=";
     };
     propagatedBuildInputs = [ ClassMix ];
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC";
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC";
     meta = {
       description = "Eksblowfish block cipher";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -5129,9 +5129,9 @@ with self; {
       url = "mirror://cpan/authors/id/B/BA/BARTB/Crypt-HSXKPasswd-v3.6.tar.gz";
       hash = "sha256-lZ3MX58BG/ALha0i31ZrerK/XqHTYrDeD7WuKfvEWLM=";
     };
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [ Clone DateTime FileHomeDir FileShare FileShareDir GetoptLong JSON ListMoreUtils MathRound Readonly TextUnidecode TypeTiny ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/hsxkpasswd
     '';
 
@@ -5356,7 +5356,7 @@ with self; {
       hash = "sha256-k+vfqu/P6atoPwEhyF8kR12Bl/C87EYBghnkERQ03eM=";
     };
     propagatedBuildInputs = [ DigestSHA1 ];
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC";
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC";
     meta = {
       description = "Emulate MySQL PASSWORD() function";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -5478,8 +5478,8 @@ with self; {
     buildInputs = [ TestException ];
     propagatedBuildInputs = [ AltCryptRSABigInt CryptCAST5_PP CryptDES_EDE3 CryptDSA CryptIDEA CryptRIPEMD160 CryptRijndael CryptTwofish FileHomeDir LWP ];
 
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/pgplet
     '';
     doCheck = false; /* test fails with 'No random source available!' */
@@ -5703,7 +5703,7 @@ with self; {
       url = "mirror://cpan/authors/id/G/GT/GTERMARS/CSS-Minifier-XS-0.13.tar.gz";
       hash = "sha256-xBnjCM3IKvHCXWuNB7L/JjR6Yit6Y+wghWq+jbQFH4I=";
     };
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC";
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC";
     buildInputs = [ TestDiagINC ];
     meta = {
       description = "XS based CSS minifier";
@@ -6058,7 +6058,7 @@ with self; {
       homepage = "https://github.com/msgpack/msgpack-perl";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
       maintainers = [ maintainers.sgo ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.DataMessagePack.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.DataMessagePack.x86_64-darwin
     };
   };
 
@@ -6332,12 +6332,12 @@ with self; {
       hash = "sha256-tVypHHafgTN8xrCrIMMmg4eOWyZj8cwljFEamZpd/dM=";
     };
     buildInputs = [ HashUtilFieldHashCompat ModuleBuildXSUtil ScopeGuard TestException ];
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Selection of utilities for data and data types";
       homepage = "https://github.com/gfx/Perl-Data-Util";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.DataUtil.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.DataUtil.x86_64-darwin
     };
   };
 
@@ -6488,7 +6488,7 @@ with self; {
     patchPhase = ''
       sed -i "s#/bin/date#${pkgs.coreutils}/bin/date#" lib/Date/Manip/TZ.pm
     '';
-    doCheck = !stdenv.isi686; # build freezes during tests on i686
+    doCheck = !stdenv.hostPlatform.isi686; # build freezes during tests on i686
     buildInputs = [ TestInter ];
     meta = {
       description = "Date manipulation routines";
@@ -7222,7 +7222,7 @@ with self; {
     buildInputs = [ pkgs.oracle-instantclient TestNoWarnings ];
     propagatedBuildInputs = [ DBI ];
 
-    postBuild = lib.optionalString stdenv.isDarwin ''
+    postBuild = lib.optionalString stdenv.hostPlatform.isDarwin ''
       install_name_tool -add_rpath "${pkgs.oracle-instantclient.lib}/lib" blib/arch/auto/DBD/Oracle/Oracle.bundle
     '';
     meta = {
@@ -7275,7 +7275,7 @@ with self; {
     meta = {
       description = "DBI driver for Sybase datasources";
       license = with lib.licenses; [ artistic1 gpl1Only ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.DBDsybase.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.DBDsybase.x86_64-darwin
     };
   };
 
@@ -7637,7 +7637,7 @@ with self; {
       hash = "sha256-z/jSTllF45RN6/ITmVprFVuR5YE0aRVrE9Ws819qXZ8=";
     };
     propagatedBuildInputs = [ HashStoredIterator JSONXS PadWalker ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Perl side of the Perl debugger for IntelliJ IDEA and other JetBrains IDEs";
       license = with lib.licenses; [ mit ];
@@ -7735,8 +7735,8 @@ with self; {
     };
     propagatedBuildInputs = [ FileWhich JSONMaybeXS ];
     buildInputs = [ CaptureTiny TestDifferences ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/*
     '';
     meta = {
@@ -8050,8 +8050,8 @@ with self; {
     };
     buildInputs = [ CPANMetaCheck TestDeep TestFailWarnings TestFatal TestFileShareDir ];
     propagatedBuildInputs = [ AppCmd CPANUploader ConfigMVPReaderINI DateTime FileCopyRecursive FileFindRule FileShareDirInstall Filepushd LogDispatchouli MooseXLazyRequire MooseXSetOnce MooseXTypesPerl PathTiny PerlPrereqScanner SoftwareLicense TermEncoding TermUI YAMLTiny ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/dzil
     '';
     doCheck = false;
@@ -8630,11 +8630,11 @@ with self; {
     };
     buildInputs = [ CaptureTiny ];
     propagatedBuildInputs = [ EmailAbstract EmailAddressXS EmailSimple ModuleRuntime Moo MooXTypesMooseLike SubExporter Throwable TryTiny ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     postPatch = ''
       patchShebangs --build util
     '';
-    preCheck = lib.optionalString stdenv.isDarwin ''
+    preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang util/sendmail
     '';
     meta = {
@@ -8813,7 +8813,7 @@ with self; {
       url = "mirror://cpan/authors/id/G/GA/GAAS/Encode-Locale-1.05.tar.gz";
       hash = "sha256-F2+gJ3H1QqTvsdvCpMko6PQ5G/QHhHO9YEDY8RrbDsE=";
     };
-    preCheck = if stdenv.isCygwin then ''
+    preCheck = if stdenv.hostPlatform.isCygwin then ''
       sed -i"" -e "s@plan tests => 13@plan tests => 10@" t/env.t
       sed -i"" -e "s@ok(env(\"\\\x@#ok(env(\"\\\x@" t/env.t
       sed -i"" -e "s@ok(\$ENV{\"\\\x@#ok(\$ENV{\"\\\x@" t/env.t
@@ -9180,7 +9180,7 @@ with self; {
       url = "mirror://cpan/authors/id/E/ET/ETJ/ExtUtils-CppGuess-0.26.tar.gz";
       hash = "sha256-yLNiuGAXKkB2rO4AQ49SuGRk8sUAcCz891J4Ef+aaD4=";
     };
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     nativeBuildInputs = [ pkgs.ld-is-cc-hook ];
     propagatedBuildInputs = [ CaptureTiny ];
     buildInputs = [ ModuleBuild ];
@@ -9915,7 +9915,7 @@ with self; {
     };
     propagatedBuildInputs = [ FileWhich ];
     preCheck = "export HOME=$TMPDIR";
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Find your home and other directories on any platform";
       homepage = "https://metacpan.org/release/File-HomeDir";
@@ -9945,7 +9945,7 @@ with self; {
       hash = "sha256-oC+/KFQGqKTZOZKE8DLy1VxWl1FUwuFnS9EJg3uAluw=";
     };
     buildInputs = [ ExtUtilsCChecker ];
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Modify attributes of symlinks without dereferencing them";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -9969,7 +9969,7 @@ with self; {
       description = "Determine MIME types of data or files using libmagic";
       homepage = "https://metacpan.org/release/File::LibMagic";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.FileLibMagic.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.FileLibMagic.x86_64-darwin
     };
   };
 
@@ -10584,7 +10584,7 @@ with self; {
     };
     buildInputs = [ Test2Suite ];
     propagatedBuildInputs = [ Future XSParseKeyword XSParseSublike ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Deferred subroutine syntax for futures";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -10816,8 +10816,8 @@ with self; {
       url = "mirror://cpan/authors/id/T/TO/TORBIAK/App-Git-Autofixup-0.004001.tar.gz";
       hash = "sha256-WroBPI3hOZD1iRoOKjnJcHTQcnvjZTIMLGrxnTbF3aw=";
     };
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/git-autofixup
     '';
     meta = {
@@ -10909,7 +10909,7 @@ with self; {
     postCheck = ''
       rm -r $out/lib
     '';
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Dynamically create Perl language bindings";
       homepage = "https://gtk2-perl.sourceforge.net";
@@ -11201,7 +11201,7 @@ with self; {
     ];
     buildInputs = [ pkgs.gtk2 ];
     # https://rt.cpan.org/Public/Bug/Display.html?id=130742
-    # doCheck = !stdenv.isDarwin;
+    # doCheck = !stdenv.hostPlatform.isDarwin;
     doCheck = false;
     propagatedBuildInputs = [ Pango ];
     meta = {
@@ -11222,7 +11222,7 @@ with self; {
     meta = {
       description = "(DEPRECATED) Perl interface to the EggTrayIcon library";
       license = with lib.licenses; [ gpl2Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.Gtk2TrayIcon.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.Gtk2TrayIcon.x86_64-darwin
     };
   };
 
@@ -11273,7 +11273,7 @@ with self; {
     meta = {
       description = "(DEPRECATED) Use single instance applications";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.Gtk2Unique.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.Gtk2Unique.x86_64-darwin
     };
   };
 
@@ -11285,7 +11285,7 @@ with self; {
       hash = "sha256-cNxL8qp0mBx54V/SmNmY4FqS66SBHxrVyfH03jdzesw=";
     };
     propagatedBuildInputs = [ pkgs.gtk3 CairoGObject GlibObjectIntrospection ];
-    preCheck = lib.optionalString stdenv.isDarwin ''
+    preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
       # Currently failing on macOS
       rm t/overrides.t
       rm t/signals.t
@@ -11372,14 +11372,14 @@ with self; {
     };
     buildInputs = [ BotTrainingMegaHAL BotTrainingStarCraft DataSection FileSlurp PodSection TestException TestExpect TestOutput TestScript TestScriptRun ];
     propagatedBuildInputs = [ ClassLoad DBDSQLite DataDump DirSelf FileCountLines GetoptLongDescriptive IOInteractive IPCSystemSimple ListMoreUtils Moose MooseXGetopt MooseXStrictConstructor MooseXTypes RegexpCommon TermSk namespaceclean ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     patches = [
       ../development/perl-modules/Hailo-fix-test-gld.patch
     ];
     postPatch = ''
       patchShebangs bin
     '';
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/hailo
     '';
     meta = {
@@ -11518,12 +11518,12 @@ with self; {
       url = "mirror://cpan/authors/id/Z/ZE/ZEFRAM/Hash-SharedMem-0.005.tar.gz";
       hash = "sha256-Mkd2gIYC973EStqpN4lTZUVAKakm+mEfMhyb9rlAu14=";
     };
-    env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isAarch64 "-mno-outline-atomics";
+    env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isAarch64 "-mno-outline-atomics";
     buildInputs = [ ScalarString ];
     meta = {
       description = "Efficient shared mutable hash";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.HashSharedMem.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.HashSharedMem.x86_64-darwin
     };
   };
 
@@ -11535,7 +11535,7 @@ with self; {
       hash = "sha256-ucvE3NgjPo0dfxSB3beaSl+dtxgMs+8CtLy+4F5l6gw=";
     };
     buildInputs = [ Test2Suite ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Functions for accessing a hashes internal iterator";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -11619,12 +11619,12 @@ with self; {
       hash = "sha256-Wl7viWUA0epsJKkIXs++mkOr7mjPxmwD+InSostoml0=";
     };
     buildInputs = [ ModuleBuildPluggablePPPort TestRequires ];
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Extremely fast HTML escaping";
       homepage = "https://github.com/tokuhirom/HTML-Escape";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.HTMLEscape.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.HTMLEscape.x86_64-darwin
     };
   };
 
@@ -12216,8 +12216,8 @@ with self; {
       description = "XS extension for processing HTTP headers";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
       broken =
-        stdenv.isi686 # loadable library and perl binaries are mismatched (got handshake key 0x7d40080, needed 0x7dc0080)
-        || stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.HTTPHeaderParserXS.x86_64-darwin
+        stdenv.hostPlatform.isi686 # loadable library and perl binaries are mismatched (got handshake key 0x7d40080, needed 0x7dc0080)
+        || stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.HTTPHeaderParserXS.x86_64-darwin
     };
   };
 
@@ -12468,7 +12468,7 @@ with self; {
       description = "Perl interface to libpng";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
       mainProgram = "pnginspect";
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.ImagePNGLibpng.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.ImagePNGLibpng.x86_64-darwin
     };
   };
 
@@ -12652,8 +12652,8 @@ with self; {
     };
     buildInputs = [ CanaryStability ];
     propagatedBuildInputs = [ commonsense ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/treescan
     '';
     meta = {
@@ -12745,7 +12745,7 @@ with self; {
     };
     propagatedBuildInputs = [ CompressRawBzip2 CompressRawZlib ];
     # Same as CompressRawZlib
-    doCheck = false && !stdenv.isDarwin;
+    doCheck = false && !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "IO Interface to compressed data files/buffers";
       homepage = "https://github.com/pmqs/IO-Compress";
@@ -12804,7 +12804,7 @@ with self; {
       url = "mirror://cpan/authors/id/L/LD/LDS/IO-Interface-1.09.tar.gz";
       hash = "sha256-5j6BxS6x4OYOwtmD9VUtJJPhFxeZJclnV/I8S9n6cTo=";
     };
-    nativeBuildInputs = lib.optionals stdenv.isDarwin [ pkgs.ld-is-cc-hook ];
+    nativeBuildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ pkgs.ld-is-cc-hook ];
     meta = {
       description = "Access and modify network interface card configuration";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -13067,7 +13067,7 @@ with self; {
       hash = "sha256-pfGoMCC8W13WwbVw9Ix1RuCo9/rBCgaHQLA5Ja2eFOg=";
     };
     patches = [ ../development/perl-modules/IO-Tty-fix-makefile.patch ];
-    doCheck = !stdenv.isDarwin;  # openpty fails in the sandbox
+    doCheck = !stdenv.hostPlatform.isDarwin;  # openpty fails in the sandbox
     meta = {
       description = "Low-level allocate a pseudo-Tty, import constants";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -13274,7 +13274,7 @@ with self; {
         available to the Perl program as if they had been written in Perl.
       '';
       license = with lib.licenses; [ artistic2 ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.InlineJava.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.InlineJava.x86_64-darwin
     };
   };
 
@@ -13299,7 +13299,7 @@ with self; {
       hash = "sha256-XZsDT1jwtv9bZGR708WpzgWypw7e4zn7wxc67nR8wFA=";
     };
     buildInputs = [ TestDiagINC ];
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC";
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC";
     meta = {
       description = "XS based JavaScript minifier";
       homepage = "https://metacpan.org/release/JavaScript-Minifier-XS";
@@ -13534,12 +13534,12 @@ with self; {
     };
     outputs = [ "out" "tex" ];
     propagatedBuildInputs = [ ArchiveZip DBFile FileWhich IOString ImageMagick ImageSize JSONXS LWP ParseRecDescent PodParser TextUnidecode XMLLibXSLT ];
-    nativeBuildInputs = [ pkgs.makeWrapper ] ++ lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = [ pkgs.makeWrapper ] ++ lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     makeMakerFlags = [ "TEXMF=\${tex}" "NOMKTEXLSR" ];
     # shebangs need to be patched before executables are copied to $out
     preBuild = ''
       patchShebangs bin/
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       for file in bin/*; do
         shortenPerlShebang "$file"
       done
@@ -14002,7 +14002,7 @@ with self; {
     };
     buildInputs = [ TestException ];
     propagatedBuildInputs = [ SubExporter ];
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Linux specific special filehandles";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -14662,7 +14662,7 @@ with self; {
     postPatch = lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
       substituteInPlace Makefile.PL --replace 'if has_module' 'if 0; #'
     '';
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     nativeCheckInputs = [ HTTPDaemon TestFatal TestNeeds TestRequiresInternet ];
     meta = {
       description = "World-Wide Web library for Perl";
@@ -15333,7 +15333,7 @@ with self; {
       description = "Manipulate 128 bits integers in Perl";
       homepage = "https://metacpan.org/release/Math-Int128";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.is32bit; # compiler doesn't support a 128-bit integer type
+      broken = stdenv.hostPlatform.is32bit; # compiler doesn't support a 128-bit integer type
     };
   };
 
@@ -15570,7 +15570,7 @@ with self; {
       description = "Fast XS implementation of MaxMind DB reader";
       homepage = "https://metacpan.org/release/MaxMind-DB-Reader-XS";
       license = with lib.licenses; [ artistic2 ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.MaxMindDBReaderXS.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.MaxMindDBReaderXS.x86_64-darwin
     };
   };
 
@@ -15588,7 +15588,7 @@ with self; {
       description = "Create MaxMind DB database files";
       homepage = "https://metacpan.org/release/MaxMind-DB-Writer";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.MaxMindDBWriter.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.MaxMindDBWriter.x86_64-darwin
     };
   };
 
@@ -16954,7 +16954,7 @@ with self; {
     };
     buildInputs = [ ModuleInstall ];
     propagatedBuildInputs = [ AlgorithmLCSS CHI DataSerializer DevelStackTrace Mojolicious Readonly StringTruncate ];
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Caching, Non-blocking I/O HTTP, Local file and WebSocket user agent";
       homepage = "https://github.com/nicomen/mojo-useragent-cached";
@@ -18114,8 +18114,8 @@ with self; {
     };
     buildInputs = [ ModuleBuildXSUtil TestException TestFatal TestLeakTrace TestOutput TestRequires TryTiny ];
     perlPreHook = "export LD=$CC";
-    env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isi686 "-fno-stack-protector";
-    hardeningDisable = lib.optional stdenv.isi686 "stackprotector";
+    env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isi686 "-fno-stack-protector";
+    hardeningDisable = lib.optional stdenv.hostPlatform.isi686 "stackprotector";
     meta = {
       description = "Moose minus the antlers";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -18458,7 +18458,7 @@ with self; {
     };
     buildInputs = [ HTTPCookies Test2Suite TestMetricsAny ];
     propagatedBuildInputs = [ Future HTTPMessage IOAsync MetricsAny StructDumb URI ];
-    preCheck = lib.optionalString stdenv.isDarwin ''
+    preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
       # network tests fail on Darwin/sandbox, so disable these
       rm -f t/20local-connect.t t/22local-connect-pipeline.t t/23local-connect-redir.t
       rm -f t/90rt75615.t t/90rt75616.t t/90rt93232.t
@@ -18511,7 +18511,7 @@ with self; {
       hash = "sha256-DayDQtPHii/syr1GZxRd1a3U+4zRjRVtKXoead/hFgA=";
     };
     propagatedBuildInputs = [ IOAsync ProtocolWebSocket URI ];
-    preCheck = lib.optionalString stdenv.isDarwin ''
+    preCheck = lib.optionalString stdenv.hostPlatform.isDarwin ''
       # network tests fail on Darwin/sandbox, so disable these
       rm -f t/02server.t t/03cross.t
     '';
@@ -18724,7 +18724,7 @@ with self; {
     meta = {
       description = "OOP Interface to FreeDB Server(s)";
       license = with lib.licenses; [ artistic1 ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.NetFreeDB.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.NetFreeDB.x86_64-darwin
     };
   };
 
@@ -19503,7 +19503,7 @@ with self; {
       hash = "sha256-z4jSquGKKHHX1/MPi6bU7lv5U+IP3KileME8dB0W0a0=";
     };
     buildInputs = [ Test2Suite TestFatal TestRefcount ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     propagatedBuildInputs = [ XSParseKeyword XSParseSublike ];
     meta = {
       description = "Simple syntax for lexical field-based objects";
@@ -19690,7 +19690,7 @@ with self; {
     # https://github.com/NixOS/nixpkgs/pull/104889#issuecomment-737144513
     preCheck = ''
       rm t/35_log.t
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       rm t/30_connect.t
       rm t/45_class.t
     '';
@@ -19862,7 +19862,7 @@ with self; {
       url = "mirror://cpan/authors/id/Z/ZE/ZEFRAM/Params-Classify-0.015.tar.gz";
       hash = "sha256-OY7BXNiZ/Ni+89ueoXSL9jHxX2wyviA+R1tn31EKWRQ=";
     };
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Argument type classification";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -20379,9 +20379,9 @@ with self; {
       hash = "sha256-5c2V3j5DvOcHdRdidLqkBfMm/IdA3wBUu4FpdcyNNJs=";
     };
     buildInputs = [ TestDeep ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [ BKeywords ConfigTiny ExceptionClass FileWhich ListSomeUtils ModulePluggable PPI PPIxQuoteLike PPIxRegexp PPIxUtilities PPIxUtils PerlTidy PodSpell Readonly StringFormat ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/perlcritic
     '';
     meta = {
@@ -20885,8 +20885,8 @@ with self; {
       hash = "sha256-RVW1J5nBZBXDy/5eMB6gLKDrvDQhTH/lLx19ykUwLik=";
     };
     propagatedBuildInputs = [ Future FutureQueue IOAsync PPI PPR PathTiny PerlCritic PerlTidy PodMarkdown URI ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/pls
     '';
     meta = {
@@ -21815,8 +21815,8 @@ with self; {
       url = "mirror://cpan/authors/id/S/SY/SYP/App-rainbarf-1.4.tar.gz";
       hash = "sha256-TxOa01+q8t4GI9wLsd2J+lpDHlSL/sh97hlM8OJcyX0=";
     };
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/rainbarf
     '';
     meta = {
@@ -22890,8 +22890,8 @@ with self; {
       patchShebangs script
     '';
 
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       for file in $out/bin/*; do
         shortenPerlShebang $file
       done
@@ -22941,7 +22941,7 @@ with self; {
     };
     buildInputs = [ LWP TestSharedFork TestTCP ];
     propagatedBuildInputs = [ ParallelPrefork Plack ServerStarter ];
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Simple, high-performance PSGI/Plack HTTP server";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -22956,9 +22956,9 @@ with self; {
       hash = "sha256-b/q5FfMj9gCJ4+v4Urm5cH1pFyZt+K/XNw+sBL/f7k4=";
     };
     buildInputs = [ LWP ModuleBuildTiny TestRequires TestTCP ];
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [ DataDump HTTPParserXS NetServer Plack NetServerSSPrefork IOSocketINET6 ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/starman
     '';
 
@@ -23318,7 +23318,7 @@ with self; {
       url = "mirror://cpan/authors/id/R/RO/ROSCH/String-ShellQuote-1.04.tar.gz";
       hash = "sha256-5gY2UDjOINZG0lXIBe/90y+GR18Y1DynVFWwDk2G3TU=";
     };
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Quote strings for passing through the shell";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -23626,7 +23626,7 @@ with self; {
       hash = "sha256-oSfa52RcGpVwzZopcMbcST1SL/BzGKNKOeQJCY9pESU=";
     };
     propagatedBuildInputs = [ LexicalSealRequireHints ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Detect undeclared subroutines in compilation";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -23668,7 +23668,7 @@ with self; {
       url = "mirror://cpan/authors/id/T/TO/TODDR/Safe-Hole-0.14.tar.gz";
       hash = "sha256-9PVui70GxP5K4G2xIYbeyt+6wep3XqGMbAKJSB0V7AU=";
     };
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Lib/Safe/Hole.pm";
       homepage = "https://github.com/toddr/Safe-Hole";
@@ -23788,7 +23788,7 @@ with self; {
     };
     buildInputs = [ Test2Suite ];
     propagatedBuildInputs = [ XSParseKeyword ];
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC";
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC";
     meta = {
       description = "Try/catch/finally syntax for perl";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -23843,8 +23843,8 @@ with self; {
         hash = "sha256-nCypGyi6bZDEXqdb7wlGGzk9cFzmYkWGP1slBpXDfHw=";
       })
     ];
-    buildInputs = lib.optional stdenv.isDarwin pkgs.darwin.apple_sdk.frameworks.Carbon;
-    doCheck = !stdenv.isAarch64;
+    buildInputs = lib.optional stdenv.hostPlatform.isDarwin pkgs.darwin.apple_sdk.frameworks.Carbon;
+    doCheck = !stdenv.hostPlatform.isAarch64;
     meta = {
       description = "Perl extension for getting CPU information. Currently only number of CPU's supported";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -23887,7 +23887,7 @@ with self; {
       url = "mirror://cpan/authors/id/L/LB/LBAXTER/Sys-SigAction-0.23.tar.gz";
       hash = "sha256-xO9sk0VTQDH8u+Ktw0f8cZTUevyUXnpE+sfpVjCV01M=";
     };
-    doCheck = !stdenv.isAarch64; # it hangs on Aarch64
+    doCheck = !stdenv.hostPlatform.isAarch64; # it hangs on Aarch64
     meta = {
       description = "Perl extension for Consistent Signal Handling";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -23933,12 +23933,12 @@ with self; {
     };
     nativeBuildInputs = [ pkgs.pkg-config ];
     buildInputs = [ pkgs.libvirt CPANChanges TestPod TestPodCoverage XMLXPath ];
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Libvirt Perl API";
       homepage = "https://libvirt.org";
       license = with lib.licenses; [ gpl2Plus artistic1 ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.SysVirt.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.SysVirt.x86_64-darwin
     };
   };
 
@@ -23949,7 +23949,7 @@ with self; {
       url = "mirror://cpan/authors/id/D/DW/DWHEELER/TAP-Parser-SourceHandler-pgTAP-3.36.tar.gz";
       hash = "sha256-B75RUy4GPqxu2OWBUFRw7ryB1VBkQa8tzzK8Dr7pjGc=";
     };
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Stream TAP from pgTAP test scripts";
       homepage = "https://search.cpan.org/dist/Tap-Parser-Sourcehandler-pgTAP";
@@ -24044,9 +24044,9 @@ with self; {
       pkgs.tcl
       pkgs.tix
       pkgs.tk
-    ] ++ lib.optionals stdenv.isDarwin [
+    ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
       darwin.apple_sdk.frameworks.CoreServices ];
-    makeMakerFlags = lib.optionals stdenv.isLinux
+    makeMakerFlags = lib.optionals stdenv.hostPlatform.isLinux
       [ "--tclsh=${pkgs.tcl}/bin/tclsh" "--nousestubs" ];
     meta = {
       description = "Tcl extension module for Perl";
@@ -24074,7 +24074,7 @@ with self; {
       mkdir -p $out/lib/perl5/site_perl
       mv $out/lib/perl5/Tcl $out/lib/perl5/site_perl/
       mv $out/lib/perl5/auto $out/lib/perl5/site_perl/
-    '' + lib.optionalString stdenv.isDarwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
       mv $out/lib/perl5/darwin-thread-multi-2level $out/lib/perl5/site_perl/
     '';
     meta = {
@@ -24190,7 +24190,7 @@ with self; {
       url = "mirror://cpan/authors/id/A/AB/ABW/Template-Toolkit-3.101.tar.gz";
       hash = "sha256-0qMt1sIeSzfGqT34CHyp6IDPrmE6Pl766jB7C9yu21g=";
     };
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     propagatedBuildInputs = [ AppConfig ];
     buildInputs = [ CGI TestLeakTrace ];
     meta = {
@@ -24524,7 +24524,7 @@ with self; {
       description = "New and improved test harness with better Test2 integration";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
       mainProgram = "yath";
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.Test2Harness.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.Test2Harness.x86_64-darwin
     };
   };
 
@@ -25330,7 +25330,7 @@ with self; {
     meta = {
       description = "Assert that code does not cause growth in memory usage";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.TestMemoryGrowth.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.TestMemoryGrowth.x86_64-darwin
     };
   };
 
@@ -25824,7 +25824,7 @@ with self; {
     };
     buildInputs = [ TestRun TestTrap ];
     propagatedBuildInputs = [ MooseXGetopt UNIVERSALrequire YAMLLibYAML ];
-    doCheck = !stdenv.isDarwin;
+    doCheck = !stdenv.hostPlatform.isDarwin;
     meta = {
       description = "Analyze tests from the command line using Test::Run";
       homepage = "http://web-cpan.berlios.de/modules/Test-Run";
@@ -26381,7 +26381,7 @@ with self; {
     # libbtparse.so: cannot open shared object file
     patches = [ ../development/perl-modules/TextBibTeX-use-lib.patch ];
     perlPreHook = "export LD=$CC";
-    perlPostHook = lib.optionalString stdenv.isDarwin ''
+    perlPostHook = lib.optionalString stdenv.hostPlatform.isDarwin ''
       oldPath="$(pwd)/btparse/src/libbtparse.dylib"
       newPath="$out/lib/libbtparse.dylib"
 
@@ -26573,7 +26573,7 @@ with self; {
     meta = {
       description = "Perl interface to iconv() codeset conversion function";
       license = with lib.licenses; [ artistic1 gpl1Plus ]; # taken from el6
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.TextIconv.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.TextIconv.x86_64-darwin
     };
   };
 
@@ -26689,7 +26689,7 @@ with self; {
       hash = "sha256-U6cw/29IgrmavYVW8mqRH1gvZ1tZ8OFnJe0ey8CE7lA=";
     };
     buildInputs = [ Filepushd ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Hoedown for Perl5";
       homepage = "https://github.com/tokuhirom/Text-Markdown-Hoedown";
@@ -27037,7 +27037,7 @@ with self; {
     meta = {
       description = "Remove accents from a string";
       license = with lib.licenses; [ gpl2Only ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.TextUnaccent.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.TextUnaccent.x86_64-darwin
     };
   };
 
@@ -27132,7 +27132,7 @@ with self; {
       url = "mirror://cpan/authors/id/K/KU/KUBOTA/Text-WrapI18N-0.06.tar.gz";
       hash = "sha256-S9KaF/DCx5LRLBAFs8J28qsPrjnACFmuF0HXlBhGpIg=";
     };
-    buildInputs = lib.optionals (!stdenv.isDarwin) [ pkgs.glibcLocales ];
+    buildInputs = lib.optionals (!stdenv.hostPlatform.isDarwin) [ pkgs.glibcLocales ];
     propagatedBuildInputs = [ TextCharWidth ];
     preConfigure = ''
       substituteInPlace WrapI18N.pm --replace '/usr/bin/locale' '${pkgs.unixtools.locale}/bin/locale'
@@ -27710,7 +27710,7 @@ with self; {
       url = "mirror://cpan/authors/id/A/AR/ARODLAND/Unicode-CaseFold-1.01.tar.gz";
       hash = "sha256-QYohKAj50Li7MwrJBQltLdNkl2dT1McVNNq5g2pjGU0=";
     };
-    perlPreHook = lib.optionalString stdenv.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isi686 "export LD=$CC"; # fix undefined reference to `__stack_chk_fail_local'
     meta = {
       description = "Unicode case-folding for case-insensitive lookups";
       homepage = "https://metacpan.org/release/Unicode-CaseFold";
@@ -27988,7 +27988,7 @@ with self; {
       url = "mirror://cpan/authors/id/C/CV/CVLIBRARY/UUID4-Tiny-0.003.tar.gz";
       hash = "sha256-4S9sgrg1dcORd3O0HA+1HPeDx8bPcuDJkWks4u8Hg2I=";
     };
-    postPatch = lib.optionalString (stdenv.isAarch64) ''
+    postPatch = lib.optionalString (stdenv.hostPlatform.isAarch64) ''
       # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h
       # printf SYS_getrandom | gcc -include sys/syscall.h -E -
       substituteInPlace lib/UUID4/Tiny.pm \
@@ -28188,7 +28188,7 @@ with self; {
     meta = {
       description = "Use WWW::Mechanize with CGI applications";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
-      broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.WWWMechanizeCGI.x86_64-darwin
+      broken = stdenv.hostPlatform.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/staging-next/perl534Packages.WWWMechanizeCGI.x86_64-darwin
     };
   };
 
@@ -28449,9 +28449,9 @@ with self; {
       url = "mirror://cpan/authors/id/S/SI/SIXTEASE/XML-Entities-1.0002.tar.gz";
       hash = "sha256-wyqk8wlXPXZIqy5Bb2K2sgZS8q2c/T7sgv1REB/nMQ0=";
     };
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [ LWP ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/download-entities.pl
     '';
     meta = {
@@ -28524,12 +28524,12 @@ with self; {
       url = "mirror://cpan/authors/id/G/GR/GRANTM/XML-Filter-Sort-1.01.tar.gz";
       hash = "sha256-UQWF85pJFszV+o1UXpYXnJHq9vx8l6QBp1aOhBFi+l8=";
     };
-    nativeBuildInputs = lib.optional stdenv.isDarwin shortenPerlShebang;
+    nativeBuildInputs = lib.optional stdenv.hostPlatform.isDarwin shortenPerlShebang;
     propagatedBuildInputs = [
       XMLSAX
       XMLSAXWriter
     ];
-    postInstall = lib.optionalString stdenv.isDarwin ''
+    postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
       shortenPerlShebang $out/bin/xmlsort
     '';
     meta = {
@@ -28581,7 +28581,7 @@ with self; {
     };
     SKIP_SAX_INSTALL = 1;
     buildInputs = [ AlienBuild AlienLibxml2 ]
-      ++ lib.optionals stdenv.isDarwin (with pkgs; [ libiconv zlib ]);
+      ++ lib.optionals stdenv.hostPlatform.isDarwin (with pkgs; [ libiconv zlib ]);
     patches = [
       # https://github.com/shlomif/perl-XML-LibXML/pull/87
       ../development/perl-modules/XML-LibXML-fix-tests-libxml-2.13.0.patch
@@ -28659,7 +28659,7 @@ with self; {
     patches = [ ../development/perl-modules/xml-parser-0001-HACK-Assumes-Expat-paths-are-good.patch ];
     postPatch = lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
       substituteInPlace Expat/Makefile.PL --replace 'use English;' '#'
-    '' + lib.optionalString stdenv.isCygwin ''
+    '' + lib.optionalString stdenv.hostPlatform.isCygwin ''
       sed -i"" -e "s@my \$compiler = File::Spec->catfile(\$path, \$cc\[0\]) \. \$Config{_exe};@my \$compiler = File::Spec->catfile(\$path, \$cc\[0\]) \. (\$^O eq 'cygwin' ? \"\" : \$Config{_exe});@" inc/Devel/CheckLib.pm
     '';
     makeMakerFlags = [ "EXPATLIBPATH=${pkgs.expat.out}/lib" "EXPATINCPATH=${pkgs.expat.dev}/include" ];
@@ -28959,7 +28959,7 @@ with self; {
       hash = "sha256-JQDEeGnPXKjGHdI8Z7rav2a48e+14nkgdlfBzmk+IR4=";
     };
     buildInputs = [ ExtUtilsCChecker Test2Suite ];
-    perlPreHook = lib.optionalString (stdenv.isi686 || stdenv.isDarwin) "export LD=$CC";
+    perlPreHook = lib.optionalString (stdenv.hostPlatform.isi686 || stdenv.hostPlatform.isDarwin) "export LD=$CC";
     meta = {
       description = "XS functions to assist in parsing keyword syntax";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -28975,7 +28975,7 @@ with self; {
       hash = "sha256-Wn0myqMroqQQUZwMJLHYCznvMgdRN224vbef2u/pms0=";
     };
     buildInputs = [ Test2Suite ];
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "XS functions to assist in parsing sub-like syntax";
       license = with lib.licenses; [ artistic1 gpl1Plus ];
@@ -29037,7 +29037,7 @@ with self; {
       url = "mirror://cpan/authors/id/T/TO/TODDR/YAML-Syck-1.34.tar.gz";
       hash = "sha256-zJFWzK69p5jr/i8xthnoBld/hg7RcEJi8X/608bjQVk=";
     };
-    perlPreHook = lib.optionalString stdenv.isDarwin "export LD=$CC";
+    perlPreHook = lib.optionalString stdenv.hostPlatform.isDarwin "export LD=$CC";
     meta = {
       description = "Fast, lightweight YAML loader and dumper";
       homepage = "https://github.com/toddr/YAML-Syck";
diff --git a/pkgs/top-level/php-packages.nix b/pkgs/top-level/php-packages.nix
index 7cef004a8745..8710dd6d977d 100644
--- a/pkgs/top-level/php-packages.nix
+++ b/pkgs/top-level/php-packages.nix
@@ -253,7 +253,7 @@ in {
 
     datadog_trace = callPackage ../development/php-packages/datadog_trace {
       buildPecl = buildPecl.override {
-        stdenv = if stdenv.isDarwin then overrideSDK stdenv "11.0" else stdenv;
+        stdenv = if stdenv.hostPlatform.isDarwin then overrideSDK stdenv "11.0" else stdenv;
       };
       inherit (pkgs) darwin;
     };
@@ -463,7 +463,7 @@ in {
           name = "iconv";
           buildInputs = [ libiconv ];
           configureFlags = [ "--with-iconv" ];
-          doCheck = stdenv.isLinux;
+          doCheck = stdenv.hostPlatform.isLinux;
         }
         {
           name = "imap";
@@ -484,7 +484,7 @@ in {
             "LDAP_DIR=${openldap.dev}"
             "LDAP_INCDIR=${openldap.dev}/include"
             "LDAP_LIBDIR=${openldap.out}/lib"
-          ] ++ lib.optionals stdenv.isLinux [
+          ] ++ lib.optionals stdenv.hostPlatform.isLinux [
             "--with-ldap-sasl=${cyrus_sasl.dev}"
           ];
           doCheck = false;
@@ -528,11 +528,11 @@ in {
           name = "opcache";
           buildInputs = [ pcre2 ] ++
             lib.optional
-              (!stdenv.isDarwin && lib.meta.availableOn stdenv.hostPlatform valgrind)
+              (!stdenv.hostPlatform.isDarwin && lib.meta.availableOn stdenv.hostPlatform valgrind)
               valgrind.dev;
           configureFlags = lib.optional php.ztsSupport "--disable-opcache-jit";
           zendExtension = true;
-          postPatch = lib.optionalString stdenv.isDarwin ''
+          postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
             # Tests are flaky on darwin
             rm ext/opcache/tests/blacklist.phpt
             rm ext/opcache/tests/bug66338.phpt
@@ -567,7 +567,7 @@ in {
           internalDeps = [ php.extensions.pdo ];
           configureFlags = [ "--with-pdo-dblib=${freetds}" ];
           # Doesn't seem to work on darwin.
-          enable = (!stdenv.isDarwin);
+          enable = (!stdenv.hostPlatform.isDarwin);
           doCheck = false;
         }
         {
@@ -671,7 +671,7 @@ in {
           buildInputs = [ net-snmp openssl ];
           configureFlags = [ "--with-snmp" ];
           # net-snmp doesn't build on darwin.
-          enable = (!stdenv.isDarwin);
+          enable = (!stdenv.hostPlatform.isDarwin);
           doCheck = false;
         }
         {
@@ -680,7 +680,7 @@ in {
           configureFlags = [
             "--enable-soap"
           ];
-          doCheck = stdenv.isDarwin;  # TODO: a couple tests still fail on *-linux
+          doCheck = stdenv.hostPlatform.isDarwin;  # TODO: a couple tests still fail on *-linux
           internalDeps = [ php.extensions.session ];
           patches = lib.optionals (lib.versions.majorMinor php.version == "8.1") [
             # Fix tests with libxml2 2.12
@@ -731,7 +731,7 @@ in {
           # The `sqlite3_bind_bug68849.phpt` test is currently broken for i686 Linux systems since sqlite 3.43, cf.:
           # - https://github.com/php/php-src/issues/12076
           # - https://www.sqlite.org/forum/forumpost/abbb95376ec6cd5f
-          patches = lib.optionals (stdenv.isi686 && stdenv.isLinux) [
+          patches = lib.optionals (stdenv.hostPlatform.isi686 && stdenv.hostPlatform.isLinux) [
             ../development/interpreters/php/skip-sqlite3_bind_bug68849.phpt.patch
           ];
         }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 386d2d8be17f..696a16f844ee 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7644,7 +7644,7 @@ self: super: with self; {
   matlink-gpapi = callPackage ../development/python-modules/matlink-gpapi { };
 
   matplotlib = callPackage ../development/python-modules/matplotlib {
-    stdenv = if stdenv.isDarwin then pkgs.clangStdenv else pkgs.stdenv;
+    stdenv = if stdenv.hostPlatform.isDarwin then pkgs.clangStdenv else pkgs.stdenv;
     inherit (pkgs.darwin.apple_sdk.frameworks) Cocoa;
     ghostscript = pkgs.ghostscript_headless;
   };
@@ -10687,7 +10687,7 @@ self: super: with self; {
   psd-tools = callPackage ../development/python-modules/psd-tools { };
 
   psutil = callPackage ../development/python-modules/psutil {
-    stdenv = if pkgs.stdenv.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
+    stdenv = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
     inherit (pkgs.darwin.apple_sdk.frameworks) CoreFoundation IOKit;
   };
 
diff --git a/pkgs/top-level/qt5-packages.nix b/pkgs/top-level/qt5-packages.nix
index b0091a16f3da..e491c443657f 100644
--- a/pkgs/top-level/qt5-packages.nix
+++ b/pkgs/top-level/qt5-packages.nix
@@ -154,7 +154,7 @@ in (noExtraAttrs (kdeFrameworks // plasmaMobileGear // plasma5 // plasma5.thirdP
   liblastfm = callPackage ../development/libraries/liblastfm { };
 
   libopenshot = callPackage ../development/libraries/libopenshot {
-    stdenv = if pkgs.stdenv.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
+    stdenv = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
     python3 = pkgs.python311;
   };
 
@@ -205,7 +205,7 @@ in (noExtraAttrs (kdeFrameworks // plasmaMobileGear // plasma5 // plasma5.thirdP
   pulseaudio-qt = callPackage ../development/libraries/pulseaudio-qt { };
 
   qca = callPackage ../development/libraries/qca {
-    stdenv = if pkgs.stdenv.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
+    stdenv = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
     inherit (libsForQt5) qtbase;
   };
   qca-qt5 = self.qca;
@@ -237,7 +237,7 @@ in (noExtraAttrs (kdeFrameworks // plasmaMobileGear // plasma5 // plasma5.thirdP
   qtinstaller = callPackage ../development/libraries/qtinstaller { };
 
   qtkeychain = callPackage ../development/libraries/qtkeychain {
-    stdenv = if pkgs.stdenv.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
+    stdenv = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.overrideSDK pkgs.stdenv "11.0" else pkgs.stdenv;
     inherit (pkgs.darwin.apple_sdk.frameworks) CoreFoundation Security;
   };
 
diff --git a/pkgs/top-level/stage.nix b/pkgs/top-level/stage.nix
index 6ad193c8926d..265ab242d86d 100644
--- a/pkgs/top-level/stage.nix
+++ b/pkgs/top-level/stage.nix
@@ -312,7 +312,7 @@ let
       crossSystem = {
         isStatic = true;
         parsed =
-          if stdenv.isLinux
+          if stdenv.hostPlatform.isLinux
           then makeMuslParsedPlatform stdenv.hostPlatform.parsed
           else stdenv.hostPlatform.parsed;
         gcc = lib.optionalAttrs (stdenv.hostPlatform.system == "powerpc64-linux") { abi = "elfv2"; } //
diff --git a/pkgs/top-level/wine-packages.nix b/pkgs/top-level/wine-packages.nix
index 18596f21014e..c31ae27c6fcf 100644
--- a/pkgs/top-level/wine-packages.nix
+++ b/pkgs/top-level/wine-packages.nix
@@ -9,35 +9,35 @@ rec {
 
   base = minimal.override {
     gettextSupport = true;
-    fontconfigSupport = stdenv.isLinux;
-    alsaSupport = stdenv.isLinux;
+    fontconfigSupport = stdenv.hostPlatform.isLinux;
+    alsaSupport = stdenv.hostPlatform.isLinux;
     openglSupport = true;
     vulkanSupport = true;
     tlsSupport = true;
     cupsSupport = true;
-    dbusSupport = stdenv.isLinux;
-    cairoSupport = stdenv.isLinux;
+    dbusSupport = stdenv.hostPlatform.isLinux;
+    cairoSupport = stdenv.hostPlatform.isLinux;
     cursesSupport = true;
-    saneSupport = stdenv.isLinux;
-    pulseaudioSupport = config.pulseaudio or stdenv.isLinux;
-    udevSupport = stdenv.isLinux;
-    xineramaSupport = stdenv.isLinux;
+    saneSupport = stdenv.hostPlatform.isLinux;
+    pulseaudioSupport = config.pulseaudio or stdenv.hostPlatform.isLinux;
+    udevSupport = stdenv.hostPlatform.isLinux;
+    xineramaSupport = stdenv.hostPlatform.isLinux;
     sdlSupport = true;
     mingwSupport = true;
     usbSupport = true;
-    waylandSupport = stdenv.isLinux;
-    x11Support = stdenv.isLinux;
+    waylandSupport = stdenv.hostPlatform.isLinux;
+    x11Support = stdenv.hostPlatform.isLinux;
   };
 
   full = base.override {
-    gtkSupport = stdenv.isLinux;
+    gtkSupport = stdenv.hostPlatform.isLinux;
     gstreamerSupport = true;
     openclSupport = true;
     odbcSupport = true;
-    netapiSupport = stdenv.isLinux;
-    vaSupport = stdenv.isLinux;
+    netapiSupport = stdenv.hostPlatform.isLinux;
+    vaSupport = stdenv.hostPlatform.isLinux;
     pcapSupport = true;
-    v4lSupport = stdenv.isLinux;
+    v4lSupport = stdenv.hostPlatform.isLinux;
     gphoto2Support = true;
     krb5Support = true;
     embedInstallers = true;