Adjust gaming packages, add mangohud

system/Vanguard.nix

@@ -17,16 +17,12 @@
       freecad
       openscad
       kicad-small
-      prismlauncher
-      cartridges
-      (lutris.override {
-        extraPkgs =
-          pkg: with pkg; [
+      mangohud
       wineWowPackages.waylandFull
       winetricks
-            dxvk
-          ];
-      })
+      lutris
+      cartridges
+      prismlauncher
     ];
     programs.obs-studio = {
       enable = true;
@@ -54,9 +50,12 @@
     };
     steam-hardware.enable = true;
   };
-  programs.steam = {
+  programs = {
+    steam = {
       enable = true;
       remotePlay.openFirewall = true;
       gamescopeSession.enable = true;
     };
+    gamemode.enable = true;
+  };
 }