Merge pull request #228571 from nrdxp/steam-gamescope-fix

Resolve Issues with Steam Gamescope module

nixos/modules/programs/steam.nix

@@ -84,6 +84,7 @@ in {
 
     gamescopeSession = mkOption {
       description = mdDoc "Run a GameScope driven Steam session from your display-manager";
+      default = {};
       type = types.submodule {
         options = {
           enable = mkEnableOption (mdDoc "GameScope Session");
@@ -135,7 +136,7 @@ in {
     environment.systemPackages = [
       cfg.package
       cfg.package.run
-    ];
+    ] ++ lib.optional cfg.gamescopeSession.enable steam-gamescope;
 
     networking.firewall = lib.mkMerge [
       (mkIf cfg.remotePlay.openFirewall {