{ config, pkgs, lib, ... }:
let
  unstable = import <nixos-unstable> {
    config.allowUnfree = true;
    config.packageOverrides = pkgs: {
      steam = pkgs.steam.override {
        extraPkgs = pkgs: with unstable.pkgs; [ gamescope mangohud ncurses6 ];
      };
      lutris = pkgs.lutris.override {
        extraPkgs = pkgs: with unstable.pkgs; [ gamescope mangohud ];
      };
    };
  };
in {
  programs = {
    gamescope.enable = true;
    steam = {
      enable = true;
      package = unstable.pkgs.steam;
    };
  };

  environment.systemPackages = with unstable.pkgs; [
    goverlay
    lutris
    protontricks
    protonup-qt
    vulkan-tools
    wine
    winetricks
  ];
}