fps limiting in mangohud

home-modules/gaming.nix

@@ -1,13 +1,25 @@
 { config, lib, pkgs, osConfig, ... }:
 
-{
+let
+  # https://raw.githubusercontent.com/flightlessmango/MangoHud/master/data/MangoHud.conf
+  mangohudConfig = pkgs.writeText "mangohud.conf" ''
+    fps_limit=0,60,90,120,240
+    show_fps_limit
+  '';
+
+  mangohudWrapped = (pkgs.runCommand
+    "mangohud"
+    { nativeBuildInputs = [ pkgs.makeWrapper ]; }
+    "makeWrapper ${pkgs.mangohud}/bin/mangohud $out/bin/mangohud --set MANGOHUD_CONFIGFILE ${mangohudConfig}"
+  );
+in {
   options.lumpiastyHome.gaming = lib.mkEnableOption "Gaming account";
 
   config = lib.mkIf config.lumpiastyHome.gaming {
     programs.lutris = {
       enable = true;
       extraPackages = with pkgs; [
-        mangohud
+        mangohudWrapped
         gamescope
       ];
     };
@@ -18,7 +30,7 @@
         ];
       }))
       (steam.override {
-        extraPkgs = pkgs': with pkgs'; [ mangohud gamescope ];
+        extraPkgs = pkgs': with pkgs'; [ mangohudWrapped gamescope ];
       })
     ];
   };