{ config, pkgs, ... }:

{ nix = {
    buildCores = 0;

    daemonNiceLevel = 10;
    daemonIONiceLevel = 4;

    autoOptimiseStore = true;
    gc = {
      automatic = true;
      options = "--delete-older-than 30d";
    };
  };

  system.autoUpgrade = {
    enable = true;
  };
  systemd.services.nixos-upgrade = {
    environment.NIXPKGS_ALLOW_UNFREE = "1";
    script = ''
      ${config.system.build.nixos-rebuild}/bin/nixos-rebuild boot ${toString config.system.autoUpgrade.flags}
    '';
  };
}