"fix" gnome-control-center to run on sway again

pkgs/default.nix

@@ -55,6 +55,12 @@ let
     # mozilla keeps nerfing itself and removing configuration options
     firefox-unwrapped = callPackage ./patched/firefox-unwrapped { inherit (unpatched) firefox-unwrapped; };
 
+    gnome = unpatched.gnome.overrideScope' (gself: gsuper: {
+      gnome-control-center = gself.callPackage ./patched/gnome-control-center {
+        inherit (gsuper) gnome-control-center;
+      };
+    });
+
     gocryptfs = callPackage ./patched/gocryptfs { inherit (unpatched) gocryptfs; };
 
     # jackett doesn't allow customization of the bind address: this will probably always be here.

pkgs/patched/gnome-control-center/default.nix

@@ -0,0 +1,15 @@
+{ gnome-control-center }:
+
+(gnome-control-center.overrideAttrs (upstream: {
+  # gnome-control-center does not start without XDG_CURRENT_DESKTOP=gnome
+  # see: <https://github.com/NixOS/nixpkgs/issues/230493>
+  # see: <https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/736>
+  #
+  # non-gnome DEs (e.g. sway) already set XDG_CURRENT_DESKTOP to something different,
+  # so changing this system-wide probably isn't a good idea.
+  preFixup = ''
+    gappsWrapperArgs+=(
+      --set XDG_CURRENT_DESKTOP "gnome"
+    );
+  '' + upstream.preFixup;
+}))