diff --git a/pkgs/development/libraries/qt-4.x/4.8/qmake-hook.sh b/pkgs/development/libraries/qt-4.x/4.8/qmake-hook.sh
index f288e99dd12..b024f52f204 100644
--- a/pkgs/development/libraries/qt-4.x/4.8/qmake-hook.sh
+++ b/pkgs/development/libraries/qt-4.x/4.8/qmake-hook.sh
@@ -8,6 +8,11 @@ qmakeConfigurePhase() {
         echo "qmake4Hook: enabled parallel building"
     fi
 
+    if ! [[ -v enableParallelInstalling ]]; then
+        enableParallelInstalling=1
+        echo "qmake: enabled parallel installing"
+    fi
+
     runHook postConfigure
 }
 
diff --git a/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh b/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh
index 741225a5aa8..0d30f0e2665 100644
--- a/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh
+++ b/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh
@@ -38,6 +38,11 @@ qmakeConfigurePhase() {
         echo "qmake: enabled parallel building"
     fi
 
+    if ! [[ -v enableParallelInstalling ]]; then
+        enableParallelInstalling=1
+        echo "qmake: enabled parallel installing"
+    fi
+
     runHook postConfigure
 }
 
diff --git a/pkgs/development/libraries/qt-6/hooks/qmake-hook.sh b/pkgs/development/libraries/qt-6/hooks/qmake-hook.sh
index ec1d2ea6124..8c4ce096443 100644
--- a/pkgs/development/libraries/qt-6/hooks/qmake-hook.sh
+++ b/pkgs/development/libraries/qt-6/hooks/qmake-hook.sh
@@ -40,6 +40,11 @@ qmakeConfigurePhase() {
         echo "qmake: enabled parallel building"
     fi
 
+    if ! [[ -v enableParallelInstalling ]]; then
+        enableParallelInstalling=1
+        echo "qmake: enabled parallel installing"
+    fi
+
     runHook postConfigure
 }
 
diff --git a/pkgs/development/tools/build-managers/bmake/setup-hook.sh b/pkgs/development/tools/build-managers/bmake/setup-hook.sh
index c5ca27dd910..f477a96d57a 100644
--- a/pkgs/development/tools/build-managers/bmake/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/bmake/setup-hook.sh
@@ -76,6 +76,7 @@ bmakeInstallPhase() {
 
     # shellcheck disable=SC2086
     local flagsArray=(
+        ${enableParallelInstalling:+-j${NIX_BUILD_CORES}}
         SHELL=$SHELL
         # Old bash empty array hack
         $makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"}
diff --git a/pkgs/development/tools/build-managers/cmake/setup-hook.sh b/pkgs/development/tools/build-managers/cmake/setup-hook.sh
index 1d25887754a..b28ed42b689 100755
--- a/pkgs/development/tools/build-managers/cmake/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/cmake/setup-hook.sh
@@ -130,6 +130,11 @@ cmakeConfigurePhase() {
         echo "cmake: enabled parallel building"
     fi
 
+    if ! [[ -v enableParallelInstalling ]]; then
+        enableParallelInstalling=1
+        echo "cmake: enabled parallel installing"
+    fi
+
     runHook postConfigure
 }
 
diff --git a/pkgs/development/tools/build-managers/meson/setup-hook.sh b/pkgs/development/tools/build-managers/meson/setup-hook.sh
index ded9c3c63b8..6305a405af2 100644
--- a/pkgs/development/tools/build-managers/meson/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/meson/setup-hook.sh
@@ -28,6 +28,11 @@ mesonConfigurePhase() {
         echo "meson: enabled parallel building"
     fi
 
+    if ! [[ -v enableParallelInstalling ]]; then
+        enableParallelInstalling=1
+        echo "meson: enabled parallel installing"
+    fi
+
     runHook postConfigure
 }
 
diff --git a/pkgs/development/tools/build-managers/ninja/setup-hook.sh b/pkgs/development/tools/build-managers/ninja/setup-hook.sh
index ecaa8b88c1a..7fa5e4675f3 100644
--- a/pkgs/development/tools/build-managers/ninja/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/ninja/setup-hook.sh
@@ -53,8 +53,16 @@ ninjaCheckPhase() {
 ninjaInstallPhase() {
     runHook preInstall
 
+    local buildCores=1
+
+    # Parallel building is enabled by default.
+    if [ "${enableParallelInstalling-1}" ]; then
+        buildCores="$NIX_BUILD_CORES"
+    fi
+
     # shellcheck disable=SC2086
     local flagsArray=(
+        -j$buildCores
         $ninjaFlags "${ninjaFlagsArray[@]}"
         ${installTargets:-install}
     )
diff --git a/pkgs/development/tools/build-managers/scons/setup-hook.sh b/pkgs/development/tools/build-managers/scons/setup-hook.sh
index 0b908f68286..67358ee843d 100644
--- a/pkgs/development/tools/build-managers/scons/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/scons/setup-hook.sh
@@ -33,6 +33,7 @@ sconsInstallPhase() {
     fi
 
     local flagsArray=(
+        ${enableParallelInstalling:+-j${NIX_BUILD_CORES}}
         $sconsFlags ${sconsFlagsArray[@]}
         $installFlags ${installFlagsArray[@]}
         ${installTargets:-install}
diff --git a/pkgs/development/tools/build-managers/wafHook/setup-hook.sh b/pkgs/development/tools/build-managers/wafHook/setup-hook.sh
index e2f6714a32d..4d95c28de1f 100644
--- a/pkgs/development/tools/build-managers/wafHook/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/wafHook/setup-hook.sh
@@ -30,6 +30,11 @@ wafConfigurePhase() {
         echo "waf: enabled parallel building"
     fi
 
+    if ! [[ -v enableParallelInstalling ]]; then
+        enableParallelInstalling=1
+        echo "waf: enabled parallel installing"
+    fi
+
     runHook postConfigure
 }
 
@@ -68,6 +73,7 @@ wafInstallPhase() {
     fi
 
     local flagsArray=(
+        ${enableParallelInstalling:+-j ${NIX_BUILD_CORES}}
         $wafFlags ${wafFlagsArray[@]}
         $installFlags ${installFlagsArray[@]}
         ${installTargets:-install}
diff --git a/pkgs/servers/x11/xorg/builder.sh b/pkgs/servers/x11/xorg/builder.sh
index 9ee81091584..a9c607ae35e 100644
--- a/pkgs/servers/x11/xorg/builder.sh
+++ b/pkgs/servers/x11/xorg/builder.sh
@@ -37,5 +37,6 @@ fi
 
 
 enableParallelBuilding=1
+enableParallelInstalling=1
 
 genericBuild
diff --git a/pkgs/stdenv/generic/make-derivation.nix b/pkgs/stdenv/generic/make-derivation.nix
index 6bf319d0730..50487b9f2e2 100644
--- a/pkgs/stdenv/generic/make-derivation.nix
+++ b/pkgs/stdenv/generic/make-derivation.nix
@@ -433,6 +433,7 @@ else let
     } // lib.optionalAttrs (enableParallelBuilding) {
       inherit enableParallelBuilding;
       enableParallelChecking = attrs.enableParallelChecking or true;
+      enableParallelInstalling = attrs.enableParallelInstalling or true;
     } // lib.optionalAttrs (hardeningDisable != [] || hardeningEnable != [] || stdenv.hostPlatform.isMusl) {
       NIX_HARDENING_ENABLE = enabledHardeningOptions;
     } // lib.optionalAttrs (stdenv.hostPlatform.isx86_64 && stdenv.hostPlatform ? gcc.arch) {
diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh
index 1a637bf13fd..734abb890c2 100644
--- a/pkgs/stdenv/generic/setup.sh
+++ b/pkgs/stdenv/generic/setup.sh
@@ -1376,6 +1376,7 @@ installPhase() {
 
     # shellcheck disable=SC2086
     local flagsArray=(
+        ${enableParallelInstalling:+-j${NIX_BUILD_CORES}}
         SHELL=$SHELL
     )
     _accumFlagsArray makeFlags makeFlagsArray installFlags installFlagsArray