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

let
  finalPkgs = import nixpkgs {
    system = config.nixpkgs.system;
    config = { };
    overlays = config.nixpkgs.overlays;
  };
in
{
  imports = [
  ];

  options.nixpkgs = {
    system = lib.mkOption {
      type = lib.types.nullOr lib.types.str;
      default = null;
    };

    overlays = lib.mkOption {
      default = [ ];
      type = lib.types.listOf lib.types.anything;
      description = "Overlays for nixpkgs.";
    };
  };

  config = {
    _module.args = {
      pkgs = finalPkgs;
    };
  };
}