qt55.polkit-qt: use multiple outputs

pkgs/development/libraries/polkit-qt-1/default.nix

@@ -9,6 +9,8 @@ assert (withQt5 -> qtbase != null); assert (!withQt5 -> qt4 != null);
 stdenv.mkDerivation {
   name = "polkit-qt-1-0.112.0";
 
+  outputs = [ "dev" "out" ];
+
   src = fetchurl {
     url = "mirror://kde/stable/apps/KDE4.x/admin/polkit-qt-1-0.112.0.tar.bz2";
     sha256 = "1ip78x20hjqvm08kxhp6gb8hf6k5n6sxyx6kk2yvvq53djzh7yv7";
@@ -18,6 +20,16 @@ stdenv.mkDerivation {
 
   propagatedBuildInputs = [ polkit glib ] ++ [(if withQt5 then qtbase else qt4)];
 
+  preConfigure = ''
+    cmakeFlags+=" -DCMAKE_INSTALL_LIBDIR=''${!outputLib}/lib"
+  '';
+
+  postFixup = ''
+    # Fix library location in CMake module
+    sed -i "$dev/lib/cmake/PolkitQt5-1/PolkitQt5-1Config.cmake" \
+        -e "s,set_and_check.POLKITQT-1_LIB_DIR.*$,set_and_check(POLKITQT-1_LIB_DIR \"''${!outputLib}/lib\"),"
+  '';
+
   meta = {
     description = "A Qt wrapper around PolKit";
     maintainers = with stdenv.lib.maintainers; [ ttuegel ];