Add adw-gtk3 transparency workaround

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/user/configs/gui/gtk/default.nix

@@ -12,6 +12,22 @@ let
   hmConfig = config.home-manager.users.${user};
 in
 {
+  # FIXME: https://github.com/lassekongo83/adw-gtk3/issues/267
+  nixpkgs.overlays = [
+    (final: prev: {
+      adw-gtk3 = prev.adw-gtk3.overrideAttrs (oldAttrs: rec {
+        pname = "adw-gtk3";
+        version = "5.3";
+        src = pkgs.fetchFromGitHub {
+          owner = "lassekongo83";
+          repo = pname;
+          rev = "v${version}";
+          sha256 = "sha256-DpJLX9PJX1Q8dDOx7YOXQzgNECsKp5uGiCVTX6iSlbI=";
+        };
+      });
+    })
+  ];
+
   home-manager.users.${user} = {
     gtk = {
       enable = true;