nix-config/modules/home-manager-modules/programs/steam.nix

{
  lib,
  pkgs,
  config,
  ...
}: {
  options.programs.steam = {
    enable = lib.mkEnableOption "enable steam";
  };

  config = lib.mkIf config.programs.steam.enable {
    home.packages = with pkgs; [
      steam
      steam.run
    ];
  };
}