The Steam package to use. Additional libraries are added from the system configuration to ensure graphics work properly. Use this option to customise the Steam package rather than adding your custom Steam to environment.systemPackages yourself.

pkgs.steam

pkgs.steam.override {
  extraEnv = {
    MANGOHUD = true;
    OBS_VKCAPTURE = true;
    RADV_TEX_ANISO = 16;
  };
  extraLibraries = p: with p; [
    atk
  ];
}