gqrx: add wrapGAppsHook

Fixes saving settings on non-NixOS systems ("No GSettings schemas are
installed on the system").

Fix https://github.com/NixOS/nixpkgs/issues/173848.

pkgs/applications/radio/gqrx/default.nix

@@ -9,6 +9,7 @@
 , fftwFloat
 , alsa-lib
 , libjack2
+, wrapGAppsHook
 # drivers (optional):
 , rtl-sdr
 , hackrf
@@ -36,6 +37,7 @@ gnuradio3_8Minimal.pkgs.mkDerivation rec {
     cmake
     pkg-config
     qt5.wrapQtAppsHook
+    wrapGAppsHook
   ];
   buildInputs = [
     gnuradio3_8Minimal.unwrapped.log4cpp
@@ -67,6 +69,12 @@ gnuradio3_8Minimal.pkgs.mkDerivation rec {
       "-DLINUX_AUDIO_BACKEND=${audioBackend}"
     ];
 
+   # Prevent double-wrapping, inject wrapper args manually instead.
+  dontWrapGApps = true;
+  preFixup = ''
+    qtWrapperArgs+=("''${gappsWrapperArgs[@]}")
+  '';
+
   meta = with lib; {
     description = "Software defined radio (SDR) receiver";
     longDescription = ''