nixos/system/gamescope.nix

{ pkgs, user, ... }: {
  imports = [ ./default.nix ./steam.nix ];
  environment.systemPackages = with pkgs; [ mesa ];
  sound.enable = true;
  hardware = {
    pulseaudio.enable = false;
    bluetooth.enable = true;
  };
  services = {
    accounts-daemon.enable = true;
    pipewire = {
      enable = true;
      alsa.enable = true;
      alsa.support32Bit = true;
      pulse.enable = true;
    };
    greetd = {
      enable = true;
      settings = rec {
        default_session.command = ''
          gamescope\
            --nested-refresh 60\
            --scaler auto --filter fsr --fsr-sharpness 10\
            --hide-cursor-delay 5 --steam -- steam -gamepadui
        '';
        initial_session = {
          inherit user;
          inherit (default_session) command;
        };
      };
    };
  };
  programs.steam.gamescopeSession.enable = true;
}