Delete and merge files

system/settings/nix/default.nix

@@ -1,23 +1,22 @@
-{ config, lib, pkgs, unstable, ... }:
+{ config, pkgs, unstable, ... }:
 {
-  imports = [ ./gc ];
-
-  options.nixpkgs.allowUnfreePackages = lib.mkOption {
-    type = with lib.types; listOf str;
-  };
-
-  config = {
-    nix.settings = {
+  nix = {
+    settings = {
       experimental-features = [
         "nix-command"
         "flakes"
       ];
       auto-optimise-store = true;
     };
-
-    _module.args.pkgsUnstable = import unstable {
-      inherit (pkgs.stdenv.hostPlatform) system;
-      inherit (config.nixpkgs) config;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 7d";
     };
   };
+
+  _module.args.pkgsUnstable = import unstable {
+    inherit (pkgs.stdenv.hostPlatform) system;
+    inherit (config.nixpkgs) config;
+  };
 }

system/settings/nix/gc/default.nix

@@ -1,8 +0,0 @@
-{ ... }:
-{
-  nix.gc = {
-    automatic = true;
-    dates = "weekly";
-    options = "--delete-older-than 7d";
-  };
-}