diff --git a/pkgs/development/libraries/polkit-qt-1/qt-5.nix b/pkgs/development/libraries/polkit-qt-1/qt-5.nix
index c6e26385d446..bdeb175b89f5 100644
--- a/pkgs/development/libraries/polkit-qt-1/qt-5.nix
+++ b/pkgs/development/libraries/polkit-qt-1/qt-5.nix
@@ -16,11 +16,6 @@ stdenv.mkDerivation {
 
   propagatedBuildInputs = [ polkit glib qtbase ];
 
-  preConfigure = ''
-    cmakeFlags+=" -DCMAKE_INSTALL_LIBDIR=''${!outputLib}/lib"
-    cmakeFlags+=" -DCMAKE_INSTALL_INCLUDEDIR=''${!outputDev}/include"
-  '';
-
   postFixup = ''
     # Fix library location in CMake module
     sed -i "$dev/lib/cmake/PolkitQt5-1/PolkitQt5-1Config.cmake" \
diff --git a/pkgs/development/tools/build-managers/cmake/setup-hook.sh b/pkgs/development/tools/build-managers/cmake/setup-hook.sh
index b14e9984bc3c..eaabb37f4987 100755
--- a/pkgs/development/tools/build-managers/cmake/setup-hook.sh
+++ b/pkgs/development/tools/build-managers/cmake/setup-hook.sh
@@ -44,6 +44,8 @@ cmakeConfigurePhase() {
     # executable. This flag makes the shared library accessible from its
     # nix/store directory.
     cmakeFlags="-DCMAKE_INSTALL_NAME_DIR=$prefix/lib $cmakeFlags"
+    cmakeFlags="-DCMAKE_INSTALL_LIBDIR=${!outputLib}/lib $cmakeFlags"
+    cmakeFlags="-DCMAKE_INSTALL_INCLUDEDIR=${!outputDev}/include $cmakeFlags"
 
     # Avoid cmake resetting the rpath of binaries, on make install
     # And build always Release, to ensure optimisation flags