appstream-qt: multiple outputs

pkgs/development/libraries/appstream/qt.nix

@@ -1,17 +1,24 @@
-{ stdenv, appstream, qtbase, qttools }:
+{ stdenv, mkDerivation, appstream, qtbase, qttools }:
 
 # TODO: look into using the libraries from the regular appstream derivation as we keep duplicates here
 
-stdenv.mkDerivation {
+mkDerivation {
   pname = "appstream-qt";
   inherit (appstream) version src prePatch;
 
+  outputs = [ "out" "dev" ];
+
   buildInputs = appstream.buildInputs ++ [ appstream qtbase ];
 
   nativeBuildInputs = appstream.nativeBuildInputs ++ [ qttools ];
 
   mesonFlags = appstream.mesonFlags ++ [ "-Dqt=true" ];
 
+  postFixup = ''
+    sed -i "$dev/lib/cmake/AppStreamQt/AppStreamQtConfig.cmake" \
+      -e "/INTERFACE_INCLUDE_DIRECTORIES/ s@\''${PACKAGE_PREFIX_DIR}@$dev@"
+  '';
+
   meta = appstream.meta // {
     description = "Software metadata handling library - Qt";
  };