added launch.nix

modules/default/desktop.nix

@@ -1,4 +1,8 @@
 {
+  lib,
+  myConfig,
+  ...
+}: {
   imports =
     [
       ../../packages/hyprland/default.nix
@@ -8,5 +12,8 @@
     ++ [
       ../../packages/steam/default.nix
       ../../packages/bottles/default.nix
+    ]
+    ++ lib.optionals (myConfig.nixos.Gaming.enable == true) [
+      ../../packages/steam/launch.nix
     ];
 }

packages/steam/launch.nix

@@ -0,0 +1,19 @@
+{pkgs, ...}: {
+  programs = {
+    gamescope = {
+      enable = true;
+      capSysNice = true;
+    };
+    steam = {
+      enable = true;
+      gamescopeSession.enable = true;
+    };
+  };
+  hardware.xone.enable = true;
+  environment = {
+    systemPackages = pkgs.mangohud;
+    loginShellInit = ''
+      [[ "$(tty)" = "/dev/tty1" ]] && ./gs.sh
+    '';
+  };
+}