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

let cfg = config.sydnix.gc;
in {
  options.sydnix.gc = {
    enable = lib.mkEnableOption "the automatic Nix garbage collector";
  };

  config = lib.mkIf cfg.enable {
    nix.gc = {
      automatic = true;
      randomizedDelaySec = "14m";
      options = "--delete-older-than 30d";
    };
  };
}