refactor(flake): avoid imports

hosts/shared/support.nix

@@ -1,7 +1,6 @@
 {
   config,
   lib,
-  pkgs,
   ...
 }: let
   cfg = config.alqueva.support;
@@ -11,19 +10,14 @@ in {
     wayland = mkEnableOption "wayland support";
   };
   config = lib.mkIf cfg.wayland {
-    xdg.portal = lib.mkDefault {
+    xdg.portal = {
       enable = true;
-      config.common = {
-        default = ["gtk"];
-      };
-      extraPortals = [pkgs.xdg-desktop-portal-gtk];
+      xdgOpenUsePortal = true;
     };
 
     environment.sessionVariables = {
       "NIXOS_OZONE_WL" = "1";
       "QT_QPA_PLATFORM" = "wayland";
     };
-
-    services.gnome.gnome-keyring.enable = true;
   };
 }