{
  pkgs,
  lib,
  ...
}: {
  # do garbage collection weekly to keep disk usage low
  nix = {
    settings = {
      experimental-features = ["nix-command" "flakes"];
    };

    gc = {
      automatic = lib.mkDefault true;
      dates = lib.mkDefault "weekly";
      options = lib.mkDefault "--delete-older-than 7d";
    };
  };

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

}