add den pattern

hosts/frodo/default.nix

@@ -1,26 +1,19 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
 { config, pkgs, ... }:
 
 {
   imports = [
-    # Include the results of the hardware scan.
     ./hardware-configuration.nix
-    ../../modules/common.nix
-    ../../modules/users.nix
-    ../../modules/locales.nix
-    ../../modules/services.nix
-    ../../modules/programs.nix
   ];
 
-  # Bootloader.
+  features.modules = {
+    core.enable = true;
+  };
+
   boot.loader.grub.enable = true;
   boot.loader.grub.device = "/dev/vda";
   boot.loader.grub.useOSProber = true;
 
-  networking.hostName = "frodo"; # Define your hostname.
+  networking.hostName = "frodo";
 
-  system.stateVersion = "25.11"; # Did you read the comment?
+  system.stateVersion = "25.11";
 }