{ pkgs, ... }: {
  environment.systemPackages = [ pkgs.terminal-notifier ];

  # manage build users, package, and daemon
  nix.configureBuildUsers = true;
  services.nix-daemon.enable = true;

  # use TouchID for sudo authentication
  security.pam.enableSudoTouchIdAuth = true;

  # used for backwards compatibility, please read the changelog before changing
  # $ darwin-rebuild changelog
  system.stateVersion = 4;
}