{...}: {
  users.mutableUsers = false;
  system.autoUpgrade = {
    enable = true;
    flake = "git+https://git.xenia.me.uk/xenia/nixos.git?ref=main";
    dates = "02:30";
    allowReboot = true;
    rebootWindow = {
      lower = "02:00";
      upper = "05:00";
    };
  };
}