fix(nix/package): account for GTK platform (#868)

nix/package/default.nix

@@ -28,6 +28,7 @@
   syrupy,
   ujson,
   vtf2img,
+  wrapGAppsHook,
 
   withJXLSupport ? false,
 }:
@@ -45,6 +46,11 @@ buildPythonApplication {
   nativeBuildInputs = [
     pythonRelaxDepsHook
     qt6.wrapQtAppsHook
+
+    # INFO: Should be unnecessary once PR is pulled.
+    # PR: https://github.com/NixOS/nixpkgs/pull/271037
+    # Issue: https://github.com/NixOS/nixpkgs/issues/149812
+    wrapGAppsHook
   ];
   buildInputs = [
     qt6.qtbase