Update on file and add pantheon

modules/system/nixos/shells/gnome.nix

@@ -33,12 +33,9 @@ in
       systemPackages =
         with pkgs;
         [
-          nautilus
-          loupe
           papers
-          simple-scan
-        ]
-        ++ (lib.optional config.os.flatpak.enable gnome-software);
+          nautilus
+        ];
     };
 
   };

modules/system/nixos/shells/pantheon.nix

@@ -0,0 +1,31 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+with lib;
+let
+  cfg = config.os.shells.pantheon;
+in
+{
+  options.os.shells.pantheon = {
+    enable = mkEnableOption "System gnome shell service";
+  };
+  config = mkIf cfg.enable {
+
+    services.desktopManager.pantheon.enable = true;
+
+    environment = {
+      pantheon.excludePackages = with pkgs; [
+        elementary-calendar
+        elementary-camera
+        elementary-mail
+        elementary-maps
+        elementary-photos
+        epiphany
+      ];
+    };
+
+  };
+}