rpcs3: add gapps hook for gtk file picker support

pkgs/by-name/rp/rpcs3/package.nix

@@ -28,6 +28,7 @@
 , SDL2
 , waylandSupport ? true
 , wayland
+, wrapGAppsHook3
 }:
 
 let
@@ -81,7 +82,9 @@ stdenv.mkDerivation {
     (lib.cmakeBool "USE_FAUDIO" faudioSupport)
   ];
 
-  nativeBuildInputs = [ cmake pkg-config git wrapQtAppsHook ];
+  dontWrapGApps = true;
+
+  nativeBuildInputs = [ cmake pkg-config git wrapQtAppsHook wrapGAppsHook3 ];
 
   buildInputs = [
     qtbase qtmultimedia openal glew vulkan-headers vulkan-loader libpng ffmpeg
@@ -90,6 +93,10 @@ stdenv.mkDerivation {
     ++ lib.optional faudioSupport faudio
     ++ lib.optionals waylandSupport [ wayland qtwayland ];
 
+  preFixup = ''
+    qtWrapperArgs+=("''${gappsWrapperArgs[@]}")
+  '';
+
   postInstall = ''
     # Taken from https://wiki.rpcs3.net/index.php?title=Help:Controller_Configuration
     install -D ${./99-ds3-controllers.rules} $out/etc/udev/rules.d/99-ds3-controllers.rules