Adjust gaming packages, add mangohud

system/Vanguard.nix

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