diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/CLTools_Executables.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/CLTools_Executables.nix
deleted file mode 100644
index f3ff413d0cae..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/CLTools_Executables.nix
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-  stdenvNoCC,
-  fetchurl,
-  cpio,
-  pbzx,
-  version,
-}:
-
-let
-  releases = builtins.fromJSON (builtins.readFile ./apple-sdk-releases.json);
-in
-stdenvNoCC.mkDerivation (finalAttrs: {
-  pname = "CLTools_Executables";
-  inherit version;
-
-  src = fetchurl releases.${version}.${finalAttrs.pname};
-
-  nativeBuildInputs = [
-    cpio
-    pbzx
-  ];
-
-  buildCommand = ''
-    pbzx $src | cpio -idm
-    mv Library/Developer/CommandLineTools $out
-  '';
-})
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/CLTools_macOSNMOS_SDK.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/CLTools_macOSNMOS_SDK.nix
deleted file mode 100644
index 7af2c48cc081..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/CLTools_macOSNMOS_SDK.nix
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-  lib,
-  stdenvNoCC,
-  fetchurl,
-  cpio,
-  pbzx,
-  version,
-}:
-
-let
-  releases = builtins.fromJSON (builtins.readFile ./apple-sdk-releases.json);
-in
-stdenvNoCC.mkDerivation (finalAttrs: {
-  pname = "CLTools_macOSNMOS_SDK";
-  inherit version;
-
-  src = fetchurl releases.${version}.${finalAttrs.pname};
-
-  nativeBuildInputs = [
-    cpio
-    pbzx
-  ];
-
-  buildCommand = ''
-    pbzx $src | cpio -idm
-    mv Library/Developer/CommandLineTools/SDKs/MacOSX${lib.versions.majorMinor version}.sdk $out
-  '';
-})
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/apple-sdk-releases.json b/pkgs/os-specific/darwin/apple-sdk-12.3/apple-sdk-releases.json
deleted file mode 100644
index 87e01f0039ce..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/apple-sdk-releases.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-  "12.3": {
-    "CLTools_Executables": {
-      "hash": "sha256-XlxHwCq+rtBF3Yyfdob3UEHN7YKzb7JF84lRmZbB/50=",
-      "url": "https://swcdn.apple.com/content/downloads/24/42/002-83793-A_74JRE8GVAT/rlnkct919wgc5c0pjq986z5bb9h62uvni2/CLTools_Executables.pkg"
-    },
-    "CLTools_macOSLMOS_SDK": {
-      "hash": "sha256-mY9YTlyTujV6R89WaNmkJrfOQatXnoSW8gKxnawQz5Q=",
-      "url": "https://swcdn.apple.com/content/downloads/24/42/002-83793-A_74JRE8GVAT/rlnkct919wgc5c0pjq986z5bb9h62uvni2/CLTools_macOSLMOS_SDK.pkg"
-    },
-    "CLTools_macOSNMOS_SDK": {
-      "hash": "sha256-Tr9VCeCP5udmh09U/zPQG2c4ky1LXscBwPfgpRy8uds=",
-      "url": "https://swcdn.apple.com/content/downloads/24/42/002-83793-A_74JRE8GVAT/rlnkct919wgc5c0pjq986z5bb9h62uvni2/CLTools_macOSNMOS_SDK.pkg"
-    },
-    "CLTools_macOS_SDK": {
-      "hash": "sha256-2xwYLfiYuEdck7/8NY3iqiPKvoG9HAjXt8Ewyp9c0Es=",
-      "url": "https://swcdn.apple.com/content/downloads/24/42/002-83793-A_74JRE8GVAT/rlnkct919wgc5c0pjq986z5bb9h62uvni2/CLTools_macOS_SDK.pkg"
-    }
-  }
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/default.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/default.nix
index 85444ec95e61..468465b19277 100644
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/default.nix
+++ b/pkgs/os-specific/darwin/apple-sdk-12.3/default.nix
@@ -1,49 +1,266 @@
+# Compatibility stubs for packages that used the old SDK frameworks.
+# TODO(@reckenrode) Make these stubs warn after framework usage has been cleaned up in nixpkgs.
 {
   lib,
+  callPackage,
   newScope,
-  overrideCC,
+  overrideSDK,
   pkgs,
   stdenv,
   stdenvNoCC,
 }:
 
 let
-  version = "12.3";
-
-  MacOSX-SDK = callPackage ./CLTools_macOSNMOS_SDK.nix { inherit version; };
-  callPackage = newScope (pkgs.darwin // packages);
-
-  packages = {
-    # Make sure we pass our special `callPackage` instead of using packages.callPackage which
-    # does not have necessary attributes in scope.
-    frameworks = callPackage ./frameworks { inherit callPackage; };
-    libs = callPackage ./libs { inherit callPackage; };
-
-    CLTools_Executables = callPackage ./CLTools_Executables.nix { inherit version; };
-    Libsystem = callPackage ./libSystem.nix { };
-    LibsystemCross = callPackage ./libSystem.nix { };
-    libunwind = callPackage ./libunwind.nix { };
-    libnetwork = callPackage ./libnetwork.nix { };
-    libpm = callPackage ./libpm.nix { };
-    # Avoid introducing a new objc4 if stdenv already has one, to prevent
-    # conflicting LLVM modules.
-    objc4 = stdenv.objc4 or (callPackage ./libobjc.nix { });
-
-    darwin-stubs = stdenvNoCC.mkDerivation {
-      pname = "darwin-stubs";
-      inherit (MacOSX-SDK) version;
-
-      preferLocalBuild = true;
-      allowSubstitutes = false;
-
-      buildCommand = ''
-        mkdir -p "$out"
-        ln -s ${MacOSX-SDK}/System "$out/System"
-        ln -s ${MacOSX-SDK}/usr "$out/usr"
-      '';
-    };
-
-    sdkRoot = pkgs.callPackage ../apple-sdk/sdkRoot.nix { sdkVersion = version; };
-  };
+  mkStub = callPackage ../apple-sdk/mk-stub.nix { } "12.3";
 in
-packages
+lib.genAttrs [
+  "CLTools_Executables"
+  "Libsystem"
+  "LibsystemCross"
+  "darwin-stubs"
+  "libnetwork"
+  "libpm"
+  "libunwind"
+  "objc4"
+  "sdkRoot"
+] mkStub
+// {
+  frameworks = lib.genAttrs [
+    "AGL"
+    "AVFAudio"
+    "AVFCapture"
+    "AVFCore"
+    "AVFoundation"
+    "AVKit"
+    "Accelerate"
+    "Accessibility"
+    "Accounts"
+    "AdServices"
+    "AdSupport"
+    "AddressBook"
+    "AddressBookCore"
+    "AppKit"
+    "AppTrackingTransparency"
+    "AppleScriptKit"
+    "AppleScriptObjC"
+    "ApplicationServices"
+    "AudioToolbox"
+    "AudioToolboxCore"
+    "AudioUnit"
+    "AudioVideoBridging"
+    "AuthenticationServices"
+    "AutomaticAssessmentConfiguration"
+    "Automator"
+    "BackgroundTasks"
+    "BusinessChat"
+    "CFNetwork"
+    "CHIP"
+    "CalendarStore"
+    "CallKit"
+    "Carbon"
+    "ClassKit"
+    "CloudKit"
+    "Cocoa"
+    "Collaboration"
+    "ColorSync"
+    "Combine"
+    "Contacts"
+    "ContactsPersistence"
+    "ContactsUI"
+    "CoreAudio"
+    "CoreAudioKit"
+    "CoreAudioTypes"
+    "CoreBluetooth"
+    "CoreData"
+    "CoreDisplay"
+    "CoreFoundation"
+    "CoreGraphics"
+    "CoreHaptics"
+    "CoreImage"
+    "CoreLocation"
+    "CoreMIDI"
+    "CoreMIDIServer"
+    "CoreML"
+    "CoreMedia"
+    "CoreMediaIO"
+    "CoreMotion"
+    "CoreServices"
+    "CoreSpotlight"
+    "CoreSymbolication"
+    "CoreTelephony"
+    "CoreText"
+    "CoreVideo"
+    "CoreWLAN"
+    "CreateML"
+    "CryptoKit"
+    "CryptoTokenKit"
+    "DVDPlayback"
+    "DataDetection"
+    "DebugSymbols"
+    "DeveloperToolsSupport"
+    "DeviceActivity"
+    "DeviceCheck"
+    "DirectoryService"
+    "DiscRecording"
+    "DiscRecordingUI"
+    "DiskArbitration"
+    "DisplayServices"
+    "DriverKit"
+    "EventKit"
+    "ExceptionHandling"
+    "ExecutionPolicy"
+    "ExposureNotification"
+    "ExternalAccessory"
+    "FWAUserLib"
+    "FileProvider"
+    "FileProviderUI"
+    "FinderSync"
+    "ForceFeedback"
+    "Foundation"
+    "GLKit"
+    "GLUT"
+    "GSS"
+    "GameCenterFoundation"
+    "GameCenterUI"
+    "GameCenterUICore"
+    "GameController"
+    "GameKit"
+    "GameplayKit"
+    "GroupActivities"
+    "Hypervisor"
+    "ICADevices"
+    "IMServicePlugIn"
+    "IOBluetooth"
+    "IOBluetoothUI"
+    "IOKit"
+    "IOSurface"
+    "IOUSBHost"
+    "IdentityLookup"
+    "ImageCaptureCore"
+    "ImageIO"
+    "InputMethodKit"
+    "InstallerPlugins"
+    "InstantMessage"
+    "Intents"
+    "IntentsUI"
+    "JavaNativeFoundation"
+    "JavaRuntimeSupport"
+    "JavaScriptCore"
+    "JavaVM"
+    "Kerberos"
+    "Kernel"
+    "KernelManagement"
+    "LDAP"
+    "LatentSemanticMapping"
+    "LinkPresentation"
+    "LocalAuthentication"
+    "LocalAuthenticationEmbeddedUI"
+    "MLCompute"
+    "MailKit"
+    "ManagedSettings"
+    "MapKit"
+    "MediaAccessibility"
+    "MediaLibrary"
+    "MediaPlayer"
+    "MediaToolbox"
+    "Message"
+    "Metal"
+    "MetalKit"
+    "MetalPerformanceShaders"
+    "MetalPerformanceShadersGraph"
+    "MetricKit"
+    "ModelIO"
+    "MultipeerConnectivity"
+    "MultitouchSupport"
+    "MusicKit"
+    "NaturalLanguage"
+    "NearbyInteraction"
+    "NetFS"
+    "Network"
+    "NetworkExtension"
+    "NotificationCenter"
+    "OSAKit"
+    "OSLog"
+    "OpenAL"
+    "OpenCL"
+    "OpenDirectory"
+    "OpenGL"
+    "PCSC"
+    "PDFKit"
+    "PHASE"
+    "ParavirtualizedGraphics"
+    "PassKit"
+    "PassKitCore"
+    "PencilKit"
+    "Photos"
+    "PhotosUI"
+    "PreferencePanes"
+    "PushKit"
+    "QTKit"
+    "Quartz"
+    "QuartzCore"
+    "QuickLook"
+    "QuickLookThumbnailing"
+    "QuickLookUI"
+    "QuickTime"
+    "RealityFoundation"
+    "RealityKit"
+    "ReplayKit"
+    "Ruby"
+    "SafariServices"
+    "SceneKit"
+    "ScreenCaptureKit"
+    "ScreenSaver"
+    "ScreenTime"
+    "ScriptingBridge"
+    "Security"
+    "SecurityFoundation"
+    "SecurityInterface"
+    "SensorKit"
+    "ServiceManagement"
+    "ShazamKit"
+    "SignpostMetrics"
+    "SkyLight"
+    "Social"
+    "SoundAnalysis"
+    "Speech"
+    "SpriteKit"
+    "StoreKit"
+    "SwiftUI"
+    "SyncServices"
+    "System"
+    "SystemConfiguration"
+    "SystemExtensions"
+    "TWAIN"
+    "TabularData"
+    "Tcl"
+    "Tk"
+    "UIFoundation"
+    "URLFormatting"
+    "UniformTypeIdentifiers"
+    "UserNotifications"
+    "UserNotificationsUI"
+    "VideoDecodeAcceleration"
+    "VideoSubscriberAccount"
+    "VideoToolbox"
+    "Virtualization"
+    "Vision"
+    "WebKit"
+    "WidgetKit"
+    "iTunesLibrary"
+    "vmnet"
+  ] mkStub;
+
+  libs = lib.genAttrs [
+    "Xplugin"
+    "utmp"
+    "libDER"
+    "xpc"
+    "sandbox"
+    "simd"
+    "utmp"
+    "xpc"
+  ] mkStub;
+
+  version = "12.3";
+}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/default.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/default.nix
deleted file mode 100644
index 8ae0cd649c93..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/default.nix
+++ /dev/null
@@ -1,146 +0,0 @@
-{
-  lib,
-  stdenvNoCC,
-  buildPackages,
-  # macOS things
-  callPackage,
-  darwin-stubs,
-}:
-
-let
-  inherit (darwin-stubs) version;
-  fixup-frameworks = callPackage ./fixups.nix { };
-  private-frameworks = callPackage ./private.nix { };
-  public-frameworks = callPackage ./public.nix { };
-
-  mkDepsRewrites =
-    deps:
-    let
-      mergeRewrites = x: y: {
-        prefix = lib.mergeAttrs (x.prefix or { }) (y.prefix or { });
-        const = lib.mergeAttrs (x.const or { }) (y.const or { });
-      };
-
-      rewriteArgs =
-        {
-          prefix ? { },
-          const ? { },
-        }:
-        lib.concatLists (
-          (lib.mapAttrsToList (from: to: [
-            "-p"
-            "${from}:${to}"
-          ]) prefix)
-          ++ (lib.mapAttrsToList (from: to: [
-            "-c"
-            "${from}:${to}"
-          ]) const)
-        );
-
-      rewrites =
-        depList:
-        lib.fold mergeRewrites { } (
-          map (dep: dep.tbdRewrites) (lib.filter (dep: dep ? tbdRewrites) depList)
-        );
-    in
-    lib.escapeShellArgs (rewriteArgs (rewrites (lib.attrValues deps)));
-
-  mkFramework =
-    {
-      name,
-      deps,
-      private ? false,
-    }:
-    let
-      standardFrameworkPath =
-        name: private:
-        "/System/Library/${lib.optionalString private "Private"}Frameworks/${name}.framework";
-
-      self = stdenvNoCC.mkDerivation {
-        pname = "apple-${lib.optionalString private "private-"}framework-${name}";
-        inherit (darwin-stubs) version;
-
-        # because we copy files from the system
-        preferLocalBuild = true;
-
-        dontUnpack = true;
-        dontBuild = true;
-
-        disallowedRequisites = [ darwin-stubs ];
-
-        nativeBuildInputs = [ buildPackages.darwin.rewrite-tbd ];
-
-        installPhase = ''
-          mkdir -p $out/Library/Frameworks
-
-          cp -r ${darwin-stubs}${standardFrameworkPath name private} $out/Library/Frameworks
-
-          if [[ -d ${darwin-stubs}/usr/lib/swift/${name}.swiftmodule ]]; then
-            mkdir -p $out/lib/swift
-            cp -r -t $out/lib/swift \
-              ${darwin-stubs}/usr/lib/swift/${name}.swiftmodule \
-              ${darwin-stubs}/usr/lib/swift/libswift${name}.tbd
-          fi
-
-          # Fix and check tbd re-export references
-          chmod u+w -R $out
-          find $out -name '*.tbd' -type f | while IFS=$'\n' read tbd; do
-            echo "Fixing re-exports in $tbd"
-            rewrite-tbd \
-              -p ${standardFrameworkPath name private}/:$out/Library/Frameworks/${name}.framework/ \
-              -p /usr/lib/swift/:$out/lib/swift/ \
-              ${mkDepsRewrites deps} \
-              -r ${builtins.storeDir} \
-              "$tbd"
-          done
-        '';
-
-        propagatedBuildInputs = lib.attrValues deps;
-
-        passthru.tbdRewrites.prefix."${standardFrameworkPath name private}/" = "${self}/Library/Frameworks/${name}.framework/";
-
-        meta = with lib; {
-          description = "Apple SDK framework ${name}";
-          maintainers = [ ];
-          platforms = platforms.darwin;
-        };
-      };
-    in
-    self;
-
-  # Helper functions for creating framework derivations.
-  framework =
-    name: deps:
-    mkFramework {
-      inherit name deps;
-      private = false;
-    };
-
-  # Helper functions for creating private framework derivations.
-  privateFramework =
-    name: deps:
-    mkFramework {
-      inherit name deps;
-      private = true;
-    };
-
-  # Merge addToFrameworks into public-frameworks and remove elements of removeFromFrameworks.
-  deps =
-    let
-      inherit (fixup-frameworks) addToFrameworks removeFromFrameworks;
-      fixupDeps =
-        name: deps:
-        lib.pipe deps [
-          # Add dependencies from addToFrameworks.
-          (deps: lib.recursiveUpdate deps (addToFrameworks.${name} or { }))
-          # Keep dependencies not in removeFromFrameworks.
-          (lib.filterAttrs (depName: _: !(removeFromFrameworks.${name}.${depName} or false)))
-        ];
-    in
-    lib.mapAttrs fixupDeps public-frameworks;
-
-  # Create derivations and add private frameworks.
-  bareFrameworks =
-    (lib.mapAttrs framework deps) // (lib.mapAttrs privateFramework private-frameworks);
-in
-bareFrameworks // fixup-frameworks.overrideFrameworks bareFrameworks
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/fixups.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/fixups.nix
deleted file mode 100644
index 6068395c4ae2..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/fixups.nix
+++ /dev/null
@@ -1,163 +0,0 @@
-{
-  lib,
-  # macOS things
-  frameworks,
-  libnetwork,
-  libs,
-  darwin-stubs,
-  objc4,
-}:
-
-{
-  # Used to add dependencies which are not picked up by gen-frameworks.py.
-  # Some of these are simply private frameworks the generator does not see.
-  # Trial and error, building things and adding dependencies when they fail.
-  addToFrameworks =
-    let
-      inherit (libs) libDER;
-      libobjc = objc4;
-    in
-    with frameworks;
-    {
-      # Below this comment are entries migrated from before the generator was
-      # added. If, for a given framework, you are able to reverify the extra
-      # deps are really necessary on top of the generator deps, move it above
-      # this comment (and maybe document your findings).
-      AVFoundation = {
-        inherit ApplicationServices AVFCapture AVFCore;
-      };
-      Accelerate = {
-        inherit CoreWLAN IOBluetooth;
-      };
-      AddressBook = {
-        inherit AddressBookCore ContactsPersistence libobjc;
-      };
-      AppKit = {
-        inherit AudioToolbox AudioUnit UIFoundation;
-      };
-      AudioToolbox = {
-        inherit AudioToolboxCore;
-      };
-      AudioUnit = {
-        inherit Carbon CoreAudio;
-      };
-      Carbon = {
-        inherit IOKit QuartzCore libobjc;
-      };
-      CoreAudio = {
-        inherit IOKit;
-      };
-      CoreData = {
-        inherit CloudKit;
-      };
-      CoreFoundation = {
-        inherit libobjc;
-      };
-      CoreGraphics = {
-        inherit SystemConfiguration;
-      };
-      CoreMIDIServer = {
-        inherit CoreMIDI;
-      };
-      CoreMedia = {
-        inherit ApplicationServices AudioToolbox AudioUnit;
-      };
-      CoreServices = {
-        inherit CoreAudio NetFS ServiceManagement;
-      };
-      CoreWLAN = {
-        inherit SecurityFoundation;
-      };
-      DiscRecording = {
-        inherit IOKit libobjc;
-      };
-      Foundation = {
-        inherit SystemConfiguration libobjc;
-      };
-      GameKit = {
-        inherit
-          GameCenterFoundation
-          GameCenterUI
-          GameCenterUICore
-          ReplayKit
-          ;
-      };
-      ICADevices = {
-        inherit Carbon libobjc;
-      };
-      IOBluetooth = {
-        inherit CoreBluetooth;
-      };
-      JavaScriptCore = {
-        inherit libobjc;
-      };
-      Kernel = {
-        inherit IOKit;
-      };
-      LinkPresentation = {
-        inherit URLFormatting;
-      };
-      MediaToolbox = {
-        inherit AudioUnit;
-      };
-      MetricKit = {
-        inherit SignpostMetrics;
-      };
-      Network = {
-        inherit libnetwork;
-      };
-      PCSC = {
-        inherit CoreData;
-      };
-      PassKit = {
-        inherit PassKitCore;
-      };
-      QTKit = {
-        inherit
-          CoreMedia
-          CoreMediaIO
-          MediaToolbox
-          VideoToolbox
-          ;
-      };
-      Quartz = {
-        inherit QTKit;
-      };
-      QuartzCore = {
-        inherit
-          ApplicationServices
-          CoreImage
-          CoreVideo
-          Metal
-          OpenCL
-          libobjc
-          ;
-      };
-      Security = {
-        inherit IOKit libDER;
-      };
-      TWAIN = {
-        inherit Carbon;
-      };
-      VideoDecodeAcceleration = {
-        inherit CoreVideo;
-      };
-      WebKit = {
-        inherit ApplicationServices Carbon libobjc;
-      };
-    };
-
-  # Used to remove dependencies which are picked up by gen-frameworks.py -- used mainly to break
-  # cyclic dependencies.
-  removeFromFrameworks = { };
-
-  # Overrides for framework derivations.
-  overrideFrameworks = super: {
-    # This framework doesn't exist in newer SDKs (somewhere around 10.13), but
-    # there are references to it in nixpkgs.
-    QuickTime = throw "QuickTime framework not available";
-
-    # Seems to be appropriate given https://developer.apple.com/forums/thread/666686
-    JavaVM = super.JavaNativeFoundation;
-  };
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/private.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/private.nix
deleted file mode 100644
index d58b28fa0271..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/private.nix
+++ /dev/null
@@ -1,35 +0,0 @@
-{ objc4, frameworks }:
-
-# generated by hand to avoid exposing all private frameworks
-# frameworks here are only the necessary ones used by public frameworks.
-{
-  AVFCapture = { };
-  AVFCore = { };
-  AddressBookCore = {
-    inherit (frameworks) ContactsPersistence;
-  };
-  AudioToolboxCore = { };
-  ContactsPersistence = { };
-  UIFoundation = { };
-  GameCenterFoundation = { };
-  GameCenterUI = { };
-  GameCenterUICore = { };
-  URLFormatting = { };
-  SignpostMetrics = { };
-  PassKitCore = { };
-  SkyLight = { };
-
-  # Also expose CoreSymbolication; used by `root` package.
-  CoreSymbolication = { };
-
-  # Also expose DebugSymbols; used by `llvmPackages_8.lldb` package.
-  DebugSymbols = { };
-
-  # Also expose DisplayServices; used by `sketchybar` package.
-  DisplayServices = {
-    libobjc = objc4;
-  };
-
-  # Also expose MultitouchSupport; used by `chuck` package.
-  MultitouchSupport = { };
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/public.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/public.nix
deleted file mode 100644
index 4488c84bf124..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/frameworks/public.nix
+++ /dev/null
@@ -1,209 +0,0 @@
-# This file is generated by gen-frameworks.nix.
-# Do not edit, put overrides in apple_sdk.nix instead.
-{ libs, frameworks }: with libs; with frameworks;
-{
-  AGL                              = { inherit Carbon OpenGL; };
-  AVFAudio                         = { inherit AudioToolbox CoreAudioTypes CoreMIDI CoreMedia Foundation; };
-  AVFoundation                     = { inherit AVFAudio CoreAudio CoreFoundation CoreGraphics CoreImage CoreMIDI CoreMedia CoreVideo Foundation IOKit ImageIO MediaToolbox Metal QuartzCore UniformTypeIdentifiers simd; };
-  AVKit                            = { inherit AVFoundation AppKit Cocoa Foundation; };
-  Accelerate                       = { inherit CoreFoundation CoreGraphics CoreVideo Foundation IOKit Metal; };
-  Accessibility                    = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  Accounts                         = { inherit Foundation; };
-  AdServices                       = { inherit Foundation; };
-  AdSupport                        = { inherit Foundation; };
-  AddressBook                      = { inherit Carbon Cocoa CoreFoundation Foundation; };
-  AppKit                           = { inherit Accessibility ApplicationServices CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal OpenGL QuartzCore; };
-  AppTrackingTransparency          = { inherit Foundation; };
-  AppleScriptKit                   = {};
-  AppleScriptObjC                  = { inherit Foundation; };
-  ApplicationServices              = { inherit ColorSync CoreFoundation CoreGraphics CoreServices CoreText ImageIO; };
-  AudioToolbox                     = { inherit Carbon CoreAudio CoreAudioTypes CoreFoundation CoreMIDI Foundation; };
-  AudioUnit                        = { inherit AudioToolbox; };
-  AudioVideoBridging               = { inherit Foundation IOKit; };
-  AuthenticationServices           = { inherit AppKit Foundation; };
-  AutomaticAssessmentConfiguration = { inherit Foundation; };
-  Automator                        = { inherit AppKit Cocoa Foundation OSAKit; };
-  BackgroundTasks                  = { inherit Foundation; };
-  BusinessChat                     = { inherit Cocoa Foundation; };
-  CFNetwork                        = { inherit CoreFoundation; };
-  CHIP                             = { inherit Foundation Security; };
-  CalendarStore                    = {};
-  CallKit                          = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  Carbon                           = { inherit ApplicationServices CoreServices Foundation Security; };
-  ClassKit                         = { inherit CoreGraphics Foundation; };
-  CloudKit                         = { inherit CoreFoundation CoreGraphics CoreLocation Foundation IOKit; };
-  Cocoa                            = { inherit AppKit CoreData Foundation; };
-  Collaboration                    = { inherit AppKit CoreServices Foundation; };
-  ColorSync                        = { inherit CoreFoundation; };
-  Combine                          = {};
-  Contacts                         = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  ContactsUI                       = { inherit AppKit; };
-  CoreAudio                        = { inherit CoreAudioTypes CoreFoundation; };
-  CoreAudioKit                     = { inherit AppKit AudioUnit Cocoa Foundation; };
-  CoreAudioTypes                   = { inherit CoreFoundation; };
-  CoreBluetooth                    = { inherit Foundation; };
-  CoreData                         = { inherit Combine CoreFoundation CoreGraphics Foundation IOKit; };
-  CoreDisplay                      = {};
-  CoreFoundation                   = {};
-  CoreGraphics                     = { inherit CoreFoundation IOKit; };
-  CoreHaptics                      = { inherit Foundation; };
-  CoreImage                        = { inherit ApplicationServices CoreFoundation CoreGraphics CoreVideo Foundation IOKit IOSurface ImageIO Metal OpenGL; };
-  CoreLocation                     = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  CoreMIDI                         = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  CoreMIDIServer                   = {};
-  CoreML                           = { inherit CoreFoundation CoreGraphics CoreVideo Foundation IOKit ImageIO Metal; };
-  CoreMedia                        = { inherit CoreAudio CoreAudioTypes CoreFoundation CoreGraphics CoreVideo Foundation IOKit Metal; };
-  CoreMediaIO                      = { inherit CoreAudio CoreFoundation CoreGraphics CoreMedia Foundation IOKit Metal; };
-  CoreMotion                       = { inherit Foundation; };
-  CoreServices                     = { inherit CFNetwork CoreFoundation DiskArbitration Security; };
-  CoreSpotlight                    = { inherit Foundation UniformTypeIdentifiers; };
-  CoreTelephony                    = {};
-  CoreText                         = { inherit CoreFoundation CoreGraphics; };
-  CoreVideo                        = { inherit ApplicationServices CoreFoundation CoreGraphics IOSurface Metal OpenGL; };
-  CoreWLAN                         = { inherit Foundation IOKit; };
-  CreateML                         = { inherit AVFoundation Combine CoreAudio CoreFoundation CoreGraphics CoreImage CoreML CoreMedia CoreServices CoreVideo Foundation IOKit ImageIO Metal MetalPerformanceShaders NaturalLanguage TabularData VideoToolbox Vision simd; };
-  CryptoKit                        = { inherit CoreFoundation CoreGraphics Foundation IOKit LocalAuthentication Security; };
-  CryptoTokenKit                   = { inherit CoreFoundation CoreGraphics Foundation IOKit Security; };
-  DVDPlayback                      = { inherit ApplicationServices CoreFoundation Security; };
-  DataDetection                    = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  DeveloperToolsSupport            = {};
-  DeviceActivity                   = { inherit Foundation ManagedSettings; };
-  DeviceCheck                      = { inherit Foundation; };
-  DirectoryService                 = { inherit CoreFoundation; };
-  DiscRecording                    = { inherit CoreServices Foundation; };
-  DiscRecordingUI                  = { inherit Carbon Cocoa DiscRecording; };
-  DiskArbitration                  = { inherit CoreFoundation IOKit; };
-  DriverKit                        = {};
-  EventKit                         = { inherit CoreGraphics CoreLocation Foundation; };
-  ExceptionHandling                = { inherit Foundation; };
-  ExecutionPolicy                  = { inherit Foundation; };
-  ExposureNotification             = { inherit Foundation; };
-  ExternalAccessory                = { inherit Foundation; };
-  FWAUserLib                       = { inherit IOKit; };
-  FileProvider                     = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  FileProviderUI                   = { inherit AppKit FileProvider Foundation; };
-  FinderSync                       = { inherit AppKit Foundation; };
-  ForceFeedback                    = { inherit CoreFoundation IOKit; };
-  Foundation                       = { inherit Combine CoreFoundation CoreGraphics CoreServices IOKit Security; };
-  GLKit                            = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal ModelIO OpenGL QuartzCore simd; };
-  GLUT                             = { inherit OpenGL; };
-  GSS                              = { inherit CoreFoundation; };
-  GameController                   = { inherit AppKit Foundation IOKit; };
-  GameKit                          = { inherit AppKit Cocoa Contacts CoreGraphics Foundation GameController GameplayKit Metal MetalKit ModelIO SceneKit SpriteKit simd; };
-  GameplayKit                      = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation GLKit IOKit Metal ModelIO QuartzCore SceneKit SpriteKit simd; };
-  GroupActivities                  = { inherit AVFoundation Combine CoreGraphics CryptoKit Foundation Network UniformTypeIdentifiers; };
-  Hypervisor                       = {};
-  ICADevices                       = { inherit CoreFoundation CoreGraphics CoreServices IOBluetooth; };
-  IMServicePlugIn                  = { inherit Foundation; };
-  IOBluetooth                      = { inherit CoreAudio CoreFoundation CoreServices Foundation IOKit; };
-  IOBluetoothUI                    = { inherit Cocoa IOBluetooth; };
-  IOKit                            = { inherit CoreFoundation; };
-  IOSurface                        = { inherit CoreFoundation Foundation IOKit; };
-  IOUSBHost                        = { inherit Foundation IOKit; };
-  IdentityLookup                   = { inherit Foundation; };
-  ImageCaptureCore                 = { inherit Cocoa CoreGraphics Foundation; };
-  ImageIO                          = { inherit CoreFoundation CoreGraphics; };
-  InputMethodKit                   = { inherit Carbon Cocoa Foundation; };
-  InstallerPlugins                 = {};
-  InstantMessage                   = {};
-  Intents                          = { inherit CoreFoundation CoreGraphics CoreLocation Foundation IOKit UserNotifications; };
-  IntentsUI                        = { inherit AppKit; };
-  JavaNativeFoundation             = { inherit Foundation; };
-  JavaRuntimeSupport               = { inherit ApplicationServices Cocoa Foundation QuartzCore; };
-  JavaScriptCore                   = { inherit CoreFoundation CoreGraphics Foundation; };
-  Kerberos                         = {};
-  Kernel                           = {};
-  KernelManagement                 = { inherit Foundation; };
-  LDAP                             = {};
-  LatentSemanticMapping            = { inherit Carbon CoreFoundation; };
-  LinkPresentation                 = { inherit AppKit Foundation; };
-  LocalAuthentication              = { inherit Foundation; };
-  LocalAuthenticationEmbeddedUI    = { inherit AppKit Foundation LocalAuthentication; };
-  MLCompute                        = { inherit CoreFoundation CoreGraphics Foundation IOKit Metal; };
-  MailKit                          = { inherit AppKit Foundation; };
-  ManagedSettings                  = { inherit Combine Foundation; };
-  MapKit                           = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage CoreLocation Foundation IOKit Metal QuartzCore; };
-  MediaAccessibility               = { inherit CoreFoundation CoreGraphics CoreText; };
-  MediaLibrary                     = { inherit Foundation; };
-  MediaPlayer                      = { inherit AVFoundation CoreGraphics Foundation; };
-  MediaToolbox                     = { inherit AudioToolbox CoreFoundation CoreMedia; };
-  Message                          = {};
-  Metal                            = { inherit CoreFoundation CoreGraphics Foundation IOKit IOSurface; };
-  MetalKit                         = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal ModelIO QuartzCore simd; };
-  MetalPerformanceShaders          = { inherit CoreGraphics Foundation Metal simd; };
-  MetalPerformanceShadersGraph     = { inherit Foundation MetalPerformanceShaders; };
-  MetricKit                        = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  ModelIO                          = { inherit CoreFoundation CoreGraphics Foundation IOKit simd; };
-  MultipeerConnectivity            = { inherit Cocoa Foundation; };
-  MusicKit                         = { inherit Combine CoreGraphics Foundation; };
-  NaturalLanguage                  = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  NearbyInteraction                = { inherit CoreFoundation CoreGraphics Foundation IOKit simd; };
-  NetFS                            = { inherit CoreFoundation; };
-  Network                          = { inherit CoreFoundation Foundation Security; };
-  NetworkExtension                 = { inherit Foundation Network Security; };
-  NotificationCenter               = { inherit AppKit Foundation; };
-  OSAKit                           = { inherit Carbon Cocoa; };
-  OSLog                            = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  OpenAL                           = {};
-  OpenCL                           = { inherit OpenGL; };
-  OpenDirectory                    = { inherit CoreFoundation Foundation; };
-  OpenGL                           = {};
-  PCSC                             = {};
-  PDFKit                           = { inherit AppKit Cocoa; };
-  PHASE                            = { inherit AVFAudio AVFoundation CoreAudioTypes Foundation ModelIO simd; };
-  ParavirtualizedGraphics          = { inherit AppKit CoreVideo Foundation IOSurface Metal; };
-  PassKit                          = { inherit AppKit Contacts CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal QuartzCore; };
-  PencilKit                        = { inherit AppKit Cocoa CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal QuartzCore; };
-  Photos                           = { inherit AVFoundation CoreAudio CoreFoundation CoreGraphics CoreImage CoreLocation CoreMIDI CoreMedia Foundation IOKit ImageIO Metal QuartzCore UniformTypeIdentifiers simd; };
-  PhotosUI                         = { inherit AppKit Foundation MapKit Photos; };
-  PreferencePanes                  = { inherit Cocoa; };
-  PushKit                          = { inherit Foundation; };
-  QTKit                            = {};
-  Quartz                           = { inherit AppKit ApplicationServices Cocoa Foundation ImageCaptureCore OpenGL PDFKit QuartzCore QuickLookUI; };
-  QuartzCore                       = { inherit CoreFoundation CoreGraphics CoreImage CoreVideo Foundation IOKit Metal OpenGL; };
-  QuickLook                        = { inherit ApplicationServices CoreFoundation; };
-  QuickLookThumbnailing            = { inherit CoreGraphics Foundation UniformTypeIdentifiers; };
-  QuickLookUI                      = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal PDFKit QuartzCore QuickLook UniformTypeIdentifiers; };
-  RealityFoundation                = { inherit AVFAudio AVFoundation AppKit AudioToolbox Combine CoreAudio CoreFoundation CoreGraphics CoreMIDI CoreMedia CoreMotion CoreText CoreVideo Foundation IOKit Metal QuartzCore simd; };
-  RealityKit                       = { inherit AppKit Combine CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal MultipeerConnectivity QuartzCore RealityFoundation simd; };
-  ReplayKit                        = { inherit AVFoundation AppKit Foundation; };
-  Ruby                             = {};
-  SafariServices                   = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal QuartzCore; };
-  SceneKit                         = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation GLKit IOKit Metal ModelIO QuartzCore simd; };
-  ScreenCaptureKit                 = { inherit AppKit CoreGraphics CoreMedia Foundation; };
-  ScreenSaver                      = { inherit AppKit Foundation; };
-  ScreenTime                       = { inherit AppKit Foundation; };
-  ScriptingBridge                  = { inherit ApplicationServices CoreServices Foundation; };
-  Security                         = { inherit CoreFoundation; };
-  SecurityFoundation               = { inherit Foundation Security; };
-  SecurityInterface                = { inherit AppKit Cocoa Security SecurityFoundation; };
-  SensorKit                        = { inherit CoreFoundation CoreLocation Foundation; };
-  ServiceManagement                = { inherit CoreFoundation Security; };
-  ShazamKit                        = { inherit AVFAudio CoreAudio CoreFoundation CoreGraphics CoreMIDI CoreMedia Foundation IOKit Metal MusicKit; };
-  Social                           = { inherit AppKit Foundation; };
-  SoundAnalysis                    = { inherit AVFoundation CoreAudio CoreFoundation CoreGraphics CoreImage CoreMIDI CoreML CoreMedia Foundation IOKit Metal QuartzCore UniformTypeIdentifiers simd; };
-  Speech                           = { inherit AVFoundation CoreAudio CoreFoundation CoreGraphics CoreImage CoreMIDI CoreMedia Foundation IOKit Metal QuartzCore UniformTypeIdentifiers simd; };
-  SpriteKit                        = { inherit AppKit Cocoa CoreData CoreFoundation CoreGraphics CoreImage Foundation GLKit IOKit Metal ModelIO QuartzCore simd; };
-  StoreKit                         = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage CryptoKit Foundation IOKit Metal QuartzCore Security; };
-  SwiftUI                          = { inherit Accessibility AppKit Combine CoreData CoreFoundation CoreGraphics CoreImage DeveloperToolsSupport Foundation IOKit Metal QuartzCore UniformTypeIdentifiers; };
-  SyncServices                     = {};
-  System                           = {};
-  SystemConfiguration              = { inherit CoreFoundation Security; };
-  SystemExtensions                 = { inherit Foundation; };
-  TWAIN                            = {};
-  TabularData                      = { inherit Combine Foundation; };
-  Tcl                              = {};
-  Tk                               = {};
-  UniformTypeIdentifiers           = { inherit CoreFoundation CoreGraphics Foundation IOKit; };
-  UserNotifications                = { inherit Foundation; };
-  UserNotificationsUI              = { inherit AppKit; };
-  VideoDecodeAcceleration          = {};
-  VideoSubscriberAccount           = { inherit Foundation; };
-  VideoToolbox                     = { inherit CoreFoundation CoreGraphics CoreMedia CoreVideo; };
-  Virtualization                   = { inherit AppKit Cocoa CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit Metal QuartzCore; };
-  Vision                           = { inherit CoreAudio CoreFoundation CoreGraphics CoreML CoreMedia CoreVideo Foundation IOKit ImageIO Metal simd; };
-  WebKit                           = { inherit AppKit CoreData CoreFoundation CoreGraphics CoreImage Foundation IOKit JavaScriptCore Metal QuartzCore; };
-  WidgetKit                        = { inherit Combine CoreFoundation CoreGraphics Foundation IOKit Intents SwiftUI UniformTypeIdentifiers; };
-  iTunesLibrary                    = { inherit Foundation; };
-  vmnet                            = {};
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libSystem.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libSystem.nix
deleted file mode 100644
index 5d57038a4657..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libSystem.nix
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-  stdenvNoCC,
-  buildPackages,
-  darwin-stubs,
-}:
-
-stdenvNoCC.mkDerivation {
-  pname = "libSystem";
-  inherit (darwin-stubs) version;
-
-  nativeBuildInputs = [ buildPackages.darwin.rewrite-tbd ];
-
-  csu = [
-    "bundle1.o"
-    "crt0.o"
-    "crt1.10.5.o"
-    "crt1.10.6.o"
-    "crt1.o"
-    "dylib1.10.5.o"
-    "dylib1.o"
-    "gcrt1.o"
-    "lazydylib1.o"
-  ];
-
-  buildCommand =
-    ''
-      mkdir -p $out/{include,lib/swift}
-    ''
-    # Copy each directory in ${darwin-stubs}/usr/include into $out/include
-    + ''
-      for dir in $(ls -d ${darwin-stubs}/usr/include/*/); do
-        cp -dr $dir $out/include
-      done
-    ''
-    # Copy each header and modulemap file in ${darwin-stubs}/usr/include into $out/include
-    + ''
-      cp -d \
-        ${darwin-stubs}/usr/include/*.h \
-        ${darwin-stubs}/usr/include/*.modulemap \
-        $out/include
-    ''
-    # Remove curses.h, ncurses.h, ncurses_dll.h, and unctrl.h which conflict with ncurses.
-    # Then, remove the module map for ncurses.
-    # NOTE: The sed expression expects the module map to use consistent indentation across
-    #   releases. If this changes, the sed expression will need to be updated.
-    #
-    #   For example, right now we assume that there is one leading space before the
-    #   "explicit" keyword and that the closing brace is on its own line (also with one
-    #   leading space).
-    + ''
-      rm $out/include/{curses,ncurses,ncurses_dll,unctrl}.h
-      sed -i -e '/^ explicit module ncurses {/,/^ }$/d' $out/include/module.modulemap
-    ''
-    + ''
-      rm $out/include/tk*.h $out/include/tcl*.h
-
-      cp -dr \
-        ${darwin-stubs}/usr/lib/libSystem.* \
-        ${darwin-stubs}/usr/lib/system \
-        $out/lib
-
-      # Extra libraries
-      for name in c dbm dl info m mx poll proc pthread rpcsvc util gcc_s.1 resolv; do
-        cp -d \
-          ${darwin-stubs}/usr/lib/lib$name.tbd \
-          ${darwin-stubs}/usr/lib/lib$name.*.tbd \
-          $out/lib
-      done
-
-      for name in os Dispatch; do
-        cp -dr \
-          ${darwin-stubs}/usr/lib/swift/$name.swiftmodule \
-          ${darwin-stubs}/usr/lib/swift/libswift$name.tbd \
-          $out/lib/swift
-      done
-
-      for f in $csu; do
-        from=${darwin-stubs}/usr/lib/$f
-        if [ -e "$from" ]; then
-          cp -d $from $out/lib
-        else
-          echo "Csu file '$from' doesn't exist: skipping"
-        fi
-      done
-
-      chmod u+w -R $out/lib
-      find $out -name '*.tbd' -type f | while read tbd; do
-        rewrite-tbd \
-          -c /usr/lib/libsystem.dylib:$out/lib/libsystem.dylib \
-          -p /usr/lib/system/:$out/lib/system/ \
-          -p /usr/lib/swift/:$out/lib/swift/ \
-          -r ${builtins.storeDir} \
-          "$tbd"
-      done
-    '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libnetwork.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libnetwork.nix
deleted file mode 100644
index e7bae2fc77a0..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libnetwork.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{ stdenvNoCC, darwin-stubs }:
-
-let
-  self = stdenvNoCC.mkDerivation {
-    pname = "libnetwork";
-    inherit (darwin-stubs) version;
-
-    buildCommand = ''
-      mkdir -p $out/lib
-      cp ${darwin-stubs}/usr/lib/libnetwork* $out/lib
-    '';
-
-    passthru.tbdRewrites.const."/usr/lib/libnetwork.dylib" = "${self}/lib/libnetwork.dylib";
-  };
-in
-self
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libobjc.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libobjc.nix
deleted file mode 100644
index 14d7e92c8a54..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libobjc.nix
+++ /dev/null
@@ -1,22 +0,0 @@
-{ stdenvNoCC, darwin-stubs }:
-
-let
-  self = stdenvNoCC.mkDerivation {
-    pname = "libobjc";
-    inherit (darwin-stubs) version;
-
-    buildCommand = ''
-      mkdir -p $out/{include,lib/swift}
-      cp -r ${darwin-stubs}/usr/include/objc $out/include
-      cp ${darwin-stubs}/usr/lib/libobjc* $out/lib
-      cp -r ${darwin-stubs}/usr/lib/swift/ObjectiveC.swiftmodule $out/lib/swift
-      cp ${darwin-stubs}/usr/lib/swift/libswiftObjectiveC.tbd $out/lib/swift
-    '';
-
-    passthru.tbdRewrites = {
-      const."/usr/lib/libobjc.A.dylib" = "${self}/lib/libobjc.A.dylib";
-      const."/usr/lib/swift/libswiftObjectiveC.dylib" = "${self}/lib/swift/libswiftObjectiveC.dylib";
-    };
-  };
-in
-self
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libpm.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libpm.nix
deleted file mode 100644
index 110b9a1ab478..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libpm.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  stdenvNoCC,
-  buildPackages,
-  darwin-stubs,
-}:
-
-stdenvNoCC.mkDerivation {
-  pname = "libpm";
-  inherit (darwin-stubs) version;
-
-  dontUnpack = true;
-  dontBuild = true;
-
-  nativeBuildInputs = [ buildPackages.darwin.checkReexportsHook ];
-
-  installPhase = ''
-    mkdir -p $out/lib
-    cp ${darwin-stubs}/usr/lib/libpm* $out/lib
-  '';
-
-  passthru.tbdRewrites = {
-    const."/usr/lib/libpmenergy.dylib" = "${placeholder "out"}/lib/libpmenergy.dylib";
-    const."/usr/lib/libpmsample.dylib" = "${placeholder "out"}/lib/libpmsample.dylib";
-  };
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/Xplugin.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/Xplugin.nix
deleted file mode 100644
index 6e125c001183..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/Xplugin.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  frameworks,
-  darwin-stubs,
-  stdenvNoCC,
-}:
-
-stdenvNoCC.mkDerivation {
-  pname = "apple-lib-Xplugin";
-  inherit (darwin-stubs) version;
-
-  dontUnpack = true;
-  dontBuild = true;
-
-  propagatedBuildInputs = with frameworks; [
-    OpenGL
-    ApplicationServices
-    Carbon
-    IOKit
-    CoreGraphics
-    CoreServices
-    CoreText
-  ];
-
-  installPhase = ''
-    mkdir -p $out/include $out/lib
-    cp "${darwin-stubs}/include/Xplugin.h" $out/include/Xplugin.h
-    cp ${darwin-stubs}/usr/lib/libXplugin.1.tbd $out/lib
-    ln -s libXplugin.1.tbd $out/lib/libXplugin.tbd
-  '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/default.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/default.nix
deleted file mode 100644
index 87a36ba32b62..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/default.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{ callPackage }:
-
-{
-  libDER = callPackage ./libDER.nix { };
-  sandbox = callPackage ./sandbox.nix { };
-  simd = callPackage ./simd.nix { };
-  utmp = callPackage ./utmp.nix { };
-  xpc = callPackage ./xpc.nix { };
-  Xplugin = callPackage ./Xplugin.nix { };
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/libDER.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/libDER.nix
deleted file mode 100644
index 4aa8e2bd9550..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/libDER.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-{ darwin-stubs, stdenvNoCC }:
-
-stdenvNoCC.mkDerivation {
-  pname = "apple-lib-libDER";
-  inherit (darwin-stubs) version;
-
-  buildCommand = ''
-    mkdir -p $out/include
-    cp -r ${darwin-stubs}/usr/include/libDER $out/include
-  '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/sandbox.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/sandbox.nix
deleted file mode 100644
index f4e9955a0b9b..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/sandbox.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{ darwin-stubs, stdenvNoCC }:
-
-stdenvNoCC.mkDerivation {
-  pname = "apple-lib-sandbox";
-  inherit (darwin-stubs) version;
-
-  buildCommand = ''
-    mkdir -p $out/include $out/lib
-    cp "${darwin-stubs}/usr/include/sandbox.h" $out/include/sandbox.h
-    cp "${darwin-stubs}/usr/lib/libsandbox.1.tbd" $out/lib
-    ln -s libsandbox.1.tbd $out/lib/libsandbox.tbd
-  '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/simd.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/simd.nix
deleted file mode 100644
index 45226a5bec59..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/simd.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-{ darwin-stubs, stdenvNoCC }:
-
-stdenvNoCC.mkDerivation {
-  pname = "apple-lib-simd";
-  inherit (darwin-stubs) version;
-
-  buildCommand = ''
-    mkdir -p $out/include
-    cp -r ${darwin-stubs}/usr/include/simd $out/include
-  '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/utmp.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/utmp.nix
deleted file mode 100644
index bc85b9be35b5..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/utmp.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{ darwin-stubs, stdenvNoCC }:
-
-stdenvNoCC.mkDerivation {
-  pname = "apple-lib-utmp";
-  inherit (darwin-stubs) version;
-
-  buildCommand = ''
-    mkdir -p $out/include
-    cp "${darwin-stubs}/include/utmp.h" $out/include
-    cp "${darwin-stubs}/include/utmpx.h" $out/include
-  '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/xpc.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libs/xpc.nix
deleted file mode 100644
index 8c9848daf9ca..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libs/xpc.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{ darwin-stubs, stdenvNoCC }:
-
-stdenvNoCC.mkDerivation {
-  pname = "apple-lib-xpc";
-  inherit (darwin-stubs) version;
-
-  buildCommand = ''
-    mkdir -p $out/include
-    cp -r "${darwin-stubs}/usr/include/xpc" $out/include/xpc
-    cp "${darwin-stubs}/usr/include/launch.h" $out/include/launch.h
-  '';
-}
diff --git a/pkgs/os-specific/darwin/apple-sdk-12.3/libunwind.nix b/pkgs/os-specific/darwin/apple-sdk-12.3/libunwind.nix
deleted file mode 100644
index c1846a9bf92f..000000000000
--- a/pkgs/os-specific/darwin/apple-sdk-12.3/libunwind.nix
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-  stdenvNoCC,
-  buildPackages,
-  darwin-stubs,
-}:
-
-stdenvNoCC.mkDerivation {
-  pname = "libunwind";
-  inherit (darwin-stubs) version;
-
-  dontUnpack = true;
-  dontBuild = true;
-
-  nativeBuildInputs = [ buildPackages.darwin.checkReexportsHook ];
-
-  installPhase = ''
-    mkdir -p $out/include/mach-o
-
-    cp \
-      ${darwin-stubs}/usr/include/libunwind.h \
-      ${darwin-stubs}/usr/include/unwind.h \
-      $out/include
-
-    cp \
-      ${darwin-stubs}/usr/include/mach-o/compact_unwind_encoding.h \
-      $out/include/mach-o
-  '';
-}
diff --git a/pkgs/top-level/darwin-packages.nix b/pkgs/top-level/darwin-packages.nix
index b09461150576..823825e10c7d 100644
--- a/pkgs/top-level/darwin-packages.nix
+++ b/pkgs/top-level/darwin-packages.nix
@@ -93,14 +93,14 @@ makeScopeWithSplicing' {
   };
 
   stubs = {
-    inherit apple_sdk_11_0;
+    inherit apple_sdk_11_0 apple_sdk_12_3;
   } // lib.genAttrs [
   ] (mkStub apple_sdk.version);
 in
 
 impure-cmds // appleSourcePackages // chooseLibs // stubs // {
 
-  inherit apple_sdk apple_sdk_10_12 apple_sdk_12_3;
+  inherit apple_sdk apple_sdk_10_12;
 
   stdenvNoCF = stdenv.override {
     extraBuildInputs = [];