{
  config,
  lib,
  pkgs,
  ...
}:

{
  nix = {
    package = pkgs.nixVersions.latest;
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 30d";
    };

    settings = {
      auto-optimise-store = true;
      experimental-features = [
        "nix-command"
        "flakes"
      ];
      warn-dirty = false;

      # avoid unwanted garbage collection when using direnv
      keep-outputs = true;
      keep-derivations = true;

      trusted-substituters = [
        "https://devenv.cachix.org"
        "https://nixcache.reflex-frp.org"
      ];
      trusted-public-keys = [
        "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
        "ryantrinkle.com-1:JJiAKaRv9mWgpVAz8dwewnZe0AzzEAzPkagE9SP5NWI="
      ];
      trusted-users = [
        "root"
        "alex"
      ];
    };
  };
}