diff --git a/pkgs/build-support/bintools-wrapper/default.nix b/pkgs/build-support/bintools-wrapper/default.nix
index 4c2a13da015e..b5adae03df2d 100644
--- a/pkgs/build-support/bintools-wrapper/default.nix
+++ b/pkgs/build-support/bintools-wrapper/default.nix
@@ -128,6 +128,8 @@ stdenv.mkDerivation {
   dontBuild = true;
   dontConfigure = true;
 
+  enableParallelBuilding = true;
+
   unpackPhase = ''
     src=$PWD
   '';
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index ac6257220fd1..35d714f9b41e 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -162,6 +162,7 @@ stdenv.mkDerivation {
 
   dontBuild = true;
   dontConfigure = true;
+  enableParallelBuilding = true;
 
   unpackPhase = ''
     src=$PWD
diff --git a/pkgs/build-support/expand-response-params/default.nix b/pkgs/build-support/expand-response-params/default.nix
index bc161d790225..9371b7702362 100644
--- a/pkgs/build-support/expand-response-params/default.nix
+++ b/pkgs/build-support/expand-response-params/default.nix
@@ -4,6 +4,7 @@ stdenv.mkDerivation {
   name = "expand-response-params";
   src = ./expand-response-params.c;
   strictDeps = true;
+  enableParallelBuilding = true;
   # Work around "stdenv-darwin-boot-2 is not allowed to refer to path
   # /nix/store/...-expand-response-params.c"
   unpackPhase = ''
diff --git a/pkgs/build-support/nuke-references/default.nix b/pkgs/build-support/nuke-references/default.nix
index 639992c0b85a..8dd9704aa4b4 100644
--- a/pkgs/build-support/nuke-references/default.nix
+++ b/pkgs/build-support/nuke-references/default.nix
@@ -15,6 +15,7 @@ stdenvNoCC.mkDerivation {
   name = "nuke-references";
 
   strictDeps = true;
+  enableParallelBuilding = true;
   dontUnpack = true;
   dontConfigure = true;
   dontBuild = true;
diff --git a/pkgs/build-support/pkg-config-wrapper/default.nix b/pkgs/build-support/pkg-config-wrapper/default.nix
index 2184b87eb1ae..312d2fe02610 100644
--- a/pkgs/build-support/pkg-config-wrapper/default.nix
+++ b/pkgs/build-support/pkg-config-wrapper/default.nix
@@ -32,6 +32,8 @@ stdenv.mkDerivation {
   pname = targetPrefix + pkg-config.pname + "-wrapper";
   inherit (pkg-config) version;
 
+  enableParallelBuilding = true;
+
   preferLocalBuild = true;
 
   shell = getBin stdenvNoCC.shell + stdenvNoCC.shell.shellPath or "";
diff --git a/pkgs/build-support/trivial-builders.nix b/pkgs/build-support/trivial-builders.nix
index 8e853888719c..1e04c9b0e293 100644
--- a/pkgs/build-support/trivial-builders.nix
+++ b/pkgs/build-support/trivial-builders.nix
@@ -71,6 +71,7 @@ rec {
     # TODO(@Artturin): enable strictDeps always
     }: buildCommand:
     stdenv.mkDerivation ({
+      enableParallelBuilding = true;
       inherit buildCommand name;
       passAsFile = [ "buildCommand" ]
         ++ (derivationArgs.passAsFile or []);
diff --git a/pkgs/development/libraries/expat/default.nix b/pkgs/development/libraries/expat/default.nix
index 67f151c4f575..f20abe0bfc35 100644
--- a/pkgs/development/libraries/expat/default.nix
+++ b/pkgs/development/libraries/expat/default.nix
@@ -28,6 +28,8 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ]; # TODO: fix referrers
   outputBin = "dev";
 
+  enableParallelBuilding = true;
+
   configureFlags = lib.optional stdenv.isFreeBSD "--with-pic";
 
   outputMan = "dev"; # tiny page for a dev tool
diff --git a/pkgs/development/libraries/libelf/default.nix b/pkgs/development/libraries/libelf/default.nix
index 695670853b71..6d894da17d0e 100644
--- a/pkgs/development/libraries/libelf/default.nix
+++ b/pkgs/development/libraries/libelf/default.nix
@@ -23,6 +23,8 @@ stdenv.mkDerivation rec {
     ./preprocessor-warnings.patch
   ];
 
+  enableParallelBuilding = true;
+
   doCheck = true;
 
   configureFlags = []
diff --git a/pkgs/development/libraries/libffi/default.nix b/pkgs/development/libraries/libffi/default.nix
index 0e71e2409cf4..7387a4a1f062 100644
--- a/pkgs/development/libraries/libffi/default.nix
+++ b/pkgs/development/libraries/libffi/default.nix
@@ -26,6 +26,8 @@ stdenv.mkDerivation rec {
   strictDeps = true;
   outputs = [ "out" "dev" "man" "info" ];
 
+  enableParallelBuilding = true;
+
   configureFlags = [
     "--with-gcc-arch=generic" # no detection of -march= or -mtune=
     "--enable-pax_emutramp"
diff --git a/pkgs/development/libraries/libiconv/default.nix b/pkgs/development/libraries/libiconv/default.nix
index 5be5ecfd82e4..a6481970ef27 100644
--- a/pkgs/development/libraries/libiconv/default.nix
+++ b/pkgs/development/libraries/libiconv/default.nix
@@ -14,6 +14,8 @@ stdenv.mkDerivation rec {
     sha256 = "016c57srqr0bza5fxjxfrx6aqxkqy0s3gkhcg7p7fhk5i6sv38g6";
   };
 
+  enableParallelBuilding = true;
+
   setupHooks = [
     ../../../build-support/setup-hooks/role.bash
     ./setup-hook.sh
diff --git a/pkgs/development/libraries/libidn2/default.nix b/pkgs/development/libraries/libidn2/default.nix
index d49f88a85f7c..02809486863f 100644
--- a/pkgs/development/libraries/libidn2/default.nix
+++ b/pkgs/development/libraries/libidn2/default.nix
@@ -21,6 +21,8 @@ stdenv.mkDerivation rec {
 
   patches = optional stdenv.isDarwin ./fix-error-darwin.patch;
 
+  enableParallelBuilding = true;
+
   # The above patch causes the documentation to be regenerated, so the
   # documentation tools are required.
   nativeBuildInputs = optionals stdenv.isDarwin [ help2man texinfo ];
diff --git a/pkgs/development/libraries/libmpc/default.nix b/pkgs/development/libraries/libmpc/default.nix
index 176bdbd85e9c..8421a2503070 100644
--- a/pkgs/development/libraries/libmpc/default.nix
+++ b/pkgs/development/libraries/libmpc/default.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
   };
 
   strictDeps = true;
+  enableParallelBuilding = true;
+
   buildInputs = [ gmp mpfr ];
 
   doCheck = true; # not cross;
diff --git a/pkgs/development/perl-modules/generic/default.nix b/pkgs/development/perl-modules/generic/default.nix
index 6de9685715d7..9ff63c14e518 100644
--- a/pkgs/development/perl-modules/generic/default.nix
+++ b/pkgs/development/perl-modules/generic/default.nix
@@ -5,6 +5,10 @@
 , outputs ? [ "out" "devdoc" ]
 , src ? null
 
+# enabling or disabling does nothing for perl packages so set it explicitly
+# to false to not change hashes when enableParallelBuildingByDefault is enabled
+, enableParallelBuilding ? false
+
 , doCheck ? true
 , checkTarget ? "test"
 
@@ -51,7 +55,7 @@ lib.warnIf (attrs ? name) "builtPerlPackage: `name' (\"${attrs.name}\") is depre
 
     fullperl = buildPerl;
 
-    inherit outputs src doCheck checkTarget;
+    inherit outputs src doCheck checkTarget enableParallelBuilding;
     inherit PERL_AUTOINSTALL AUTOMATED_TESTING PERL_USE_UNSAFE_INC;
 
     meta = defaultMeta // (attrs.meta or { });
diff --git a/pkgs/development/tools/misc/autoconf-archive/default.nix b/pkgs/development/tools/misc/autoconf-archive/default.nix
index aff3d1ae0813..bde9db89434c 100644
--- a/pkgs/development/tools/misc/autoconf-archive/default.nix
+++ b/pkgs/development/tools/misc/autoconf-archive/default.nix
@@ -10,6 +10,8 @@ stdenv.mkDerivation rec {
   };
 
   strictDeps = true;
+  enableParallelBuilding = true;
+
   buildInputs = [ xz ];
 
   meta = with lib; {
diff --git a/pkgs/development/tools/misc/gnum4/default.nix b/pkgs/development/tools/misc/gnum4/default.nix
index 00e71835ebb8..34df06ad0f4c 100644
--- a/pkgs/development/tools/misc/gnum4/default.nix
+++ b/pkgs/development/tools/misc/gnum4/default.nix
@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
   };
 
   strictDeps = true;
+  enableParallelBuilding = true;
+
   doCheck = false;
 
   configureFlags = [ "--with-syscmd-shell=${stdenv.shell}" ]
diff --git a/pkgs/development/tools/misc/help2man/default.nix b/pkgs/development/tools/misc/help2man/default.nix
index 05c658697176..c432aaa82e12 100644
--- a/pkgs/development/tools/misc/help2man/default.nix
+++ b/pkgs/development/tools/misc/help2man/default.nix
@@ -16,6 +16,8 @@ stdenv.mkDerivation rec {
 
   strictDeps = true;
 
+  enableParallelBuilding = true;
+
   nativeBuildInputs = [ gettext perlPackages.perl perlPackages.LocaleGettext ];
   buildInputs = [ perlPackages.LocaleGettext libintl ];
 
diff --git a/pkgs/development/tools/misc/patchelf/default.nix b/pkgs/development/tools/misc/patchelf/default.nix
index a3cac523bcb3..d51af9ca3327 100644
--- a/pkgs/development/tools/misc/patchelf/default.nix
+++ b/pkgs/development/tools/misc/patchelf/default.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
   strictDeps = true;
   setupHook = [ ./setup-hook.sh ];
 
+  enableParallelBuilding = true;
+
   # fails 8 out of 24 tests, problems when loading libc.so.6
   doCheck = stdenv.name == "stdenv-linux";
 
diff --git a/pkgs/development/tools/misc/texinfo/common.nix b/pkgs/development/tools/misc/texinfo/common.nix
index 3940843b8b0d..e5814e9bda4c 100644
--- a/pkgs/development/tools/misc/texinfo/common.nix
+++ b/pkgs/development/tools/misc/texinfo/common.nix
@@ -34,6 +34,8 @@ stdenv.mkDerivation {
   NATIVE_TOOLS_LDFLAGS = if crossBuildTools then "-L${getLib buildPackages.ncurses}/lib" else null;
 
   strictDeps = true;
+  enableParallelBuilding = true;
+
   # We need a native compiler to build perl XS extensions
   # when cross-compiling.
   depsBuildBuild = [ buildPackages.stdenv.cc perl ];
diff --git a/pkgs/os-specific/linux/kernel-headers/default.nix b/pkgs/os-specific/linux/kernel-headers/default.nix
index 580bb49d8cfc..f84416d98d6a 100644
--- a/pkgs/os-specific/linux/kernel-headers/default.nix
+++ b/pkgs/os-specific/linux/kernel-headers/default.nix
@@ -15,6 +15,8 @@ let
     ARCH = stdenvNoCC.hostPlatform.linuxArch;
 
     strictDeps = true;
+    enableParallelBuilding = true;
+
     # It may look odd that we use `stdenvNoCC`, and yet explicit depend on a cc.
     # We do this so we have a build->build, not build->host, C compiler.
     depsBuildBuild = [ buildPackages.stdenv.cc ];
diff --git a/pkgs/stdenv/linux/default.nix b/pkgs/stdenv/linux/default.nix
index 33fdce6b2069..956aeff49462 100644
--- a/pkgs/stdenv/linux/default.nix
+++ b/pkgs/stdenv/linux/default.nix
@@ -164,6 +164,7 @@ in
         pname = "bootstrap-stage0-${localSystem.libc}";
         strictDeps = true;
         version = "bootstrap";
+        enableParallelBuilding = true;
         buildCommand = ''
           mkdir -p $out
           ln -s ${bootstrapTools}/lib $out/lib
@@ -268,6 +269,7 @@ in
         # apparently the interpreter needs to match libc, too.
         bintools = self.stdenvNoCC.mkDerivation {
           inherit (prevStage.bintools.bintools) name;
+          enableParallelBuilding = true;
           dontUnpack = true;
           dontBuild = true;
           strictDeps = true;
diff --git a/pkgs/tools/compression/xz/default.nix b/pkgs/tools/compression/xz/default.nix
index ddc3dc574fca..75a58d011cef 100644
--- a/pkgs/tools/compression/xz/default.nix
+++ b/pkgs/tools/compression/xz/default.nix
@@ -21,6 +21,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = lib.optional enableStatic "--disable-shared";
 
+  enableParallelBuilding = true;
   doCheck = true;
 
   preCheck = ''
diff --git a/pkgs/tools/misc/file/default.nix b/pkgs/tools/misc/file/default.nix
index 26c8bf810f9c..6454bb4eac28 100644
--- a/pkgs/tools/misc/file/default.nix
+++ b/pkgs/tools/misc/file/default.nix
@@ -13,6 +13,8 @@ stdenv.mkDerivation rec {
   };
 
   strictDeps = true;
+  enableParallelBuilding = true;
+
   nativeBuildInputs = lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) file;
   buildInputs = [ zlib ]
     ++ lib.optional stdenv.hostPlatform.isWindows libgnurx;
diff --git a/pkgs/tools/system/which/default.nix b/pkgs/tools/system/which/default.nix
index 3eed6538f33c..aecf68e8c7fa 100644
--- a/pkgs/tools/system/which/default.nix
+++ b/pkgs/tools/system/which/default.nix
@@ -10,6 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   strictDeps = true;
+  enableParallelBuilding = true;
 
   meta = with lib; {
     homepage = "https://www.gnu.org/software/which/";