{
  pkgs,
  config,
  lib,
  ...
}:
{
  nixpkgs.config.allowUnfreePredicate =
    pkg:
    builtins.elem (lib.getName pkg) [
      "steam"
      "steam-original"
      "steam-unwrapped"
      "steam-run"
    ];

  programs.steam = {
    enable = true;
    extraCompatPackages = with pkgs; [ proton-ge-bin ];
  };

  environment.systemPackages = with pkgs; [
    steamtinkerlaunch
    mangohud
    goverlay
    yad
  ];

  # Create steam session script
  environment.etc."steam-session-greetd".source = pkgs.writeShellScript "steam-session-greetd" ''
    export STEAM_RUNTIME=1
    export SDL_VIDEODRIVER=wayland
    export QT_QPA_PLATFORM=wayland
    export GDK_BACKEND=wayland
    export XDG_CURRENT_DESKTOP=Steam
    export XDG_SESSION_TYPE=wayland
    exec ${pkgs.gamescope}/bin/gamescope --adaptive-sync --hdr-enabled --mangoapp --rt --steam -- ${pkgs.steam}/bin/steam -pipewire-dmabuf -tenfoot
  '';

  # Create system-wide session files
  environment.etc."xdg/wayland-sessions/steam-session.desktop".text = ''
    [Desktop Entry]
    Name=Steam Session
    Comment=Steam Deck-like gaming session with gamescope
    Exec=/etc/steam-session-greetd
    Type=Application
    DesktopNames=steam
  '';

}