add den pattern

modules/gaming/default.nix

@@ -0,0 +1,6 @@
+{ lib, ... }: {
+  imports = lib.mapAttrsToList
+    (file: _: ./. + "/${file}")
+    (lib.filterAttrs (file: _: lib.hasSuffix ".nix" file && file != "default.nix")
+      (builtins.readDir ./.));
+}

modules/gaming/gaming.nix

@@ -0,0 +1,24 @@
+{ config, lib, pkgs, ... }:
+
+let
+  dirModules = config.features.modules.gaming or { };
+in
+{
+  config = lib.mkIf ((dirModules.enable or false) && (dirModules.gaming.enable or true)) {
+    programs.steam = {
+      enable = true;
+      remotePlay.openFirewall = true;
+      localNetworkGameTransfers.openFirewall = true;
+      package = pkgs.steam.override {
+        extraEnv = {
+          MANGOHUD = "1";
+          WINE_VK_VULKAN_ONLY = "1";
+        };
+      };
+    };
+
+    environment.systemPackages = [
+      pkgs.mangohud
+    ];
+  };
+}