works again, mostly done, now we can start with server

modules/desktop/shell/launcher.nix

@@ -12,20 +12,23 @@
       walker.enable = lib.mkEnableOption "enable walker";
       rofi.enable = lib.mkEnableOption "enable rofi";
       launcher = lib.mkOption {
-        default = (lib.mkIf config.desktop.shell.walker.enable "walker");
+        default = (if config.desktop.shell.walker.enable then "walker" else null);
         description = "default launcher";
       };
     };
   };
 
-  config =  {
-    programs = {
-      walker = lib.mkIf config.desktop.shell.walker.enable {
-        enable = true;
-      };
-    };
-    environment.systemPackages = with pkgs; [
-      (lib.mkIf (config.desktop.shell.rofi.enable) rofi)
-    ];
+  config = {
+    environment.systemPackages =
+      with pkgs;
+      [
+      ]
+      ++ (
+        if config.desktop.shell.rofi.enable then
+
+          [ rofi ]
+        else
+          [ ]
+      );
   };
 }

modules/desktop/shell/noctalia.nix

@@ -12,13 +12,4 @@
       noctalia.enable = lib.mkEnableOption "enable noctalia";
     };
   };
-  imports = lib.mkIf config.desktop.shell.noctalia.enable [
-    inputs.noctalia.homeModules.default
-  ];
-  config = lib.mkIf config.desktop.shell.noctalia.enable {
-    desktop.shell.swww.enable = lib.mkDefault false;
-    programs.noctalia-shell = {
-      enable = true;
-    };
-  };
 }

modules/desktop/shell/swww.nix

@@ -13,10 +13,20 @@
     };
   };
 
-  config = lib.mkIf config.desktop.shell.swww.enable {
-    environment.systemPackages = with pkgs; [
-      waypaper
-      swww
-    ];
-  };
+  config =
+
+    {
+      environment.systemPackages =
+        with pkgs;
+        [ ]
+        ++ (
+          if config.desktop.shell.swww.enable then
+            [
+              waypaper
+              swww
+            ]
+          else
+            [ ]
+        );
+    };
 }

modules/desktop/shell/waybar.nix

@@ -12,11 +12,15 @@
     };
   };
 
-  config = lib.mkIf config.desktop.shell.waybar.enable {
-    programs = {
-      waybar = {
-        enable = true;
-      };
-    };
+  config = {
+    programs =
+      if config.desktop.shell.waybar.enable then
+        {
+          waybar = {
+            enable = true;
+          };
+        }
+      else
+        { };
   };
 }