{
  system ? builtins.currentSystem,
  sources ? import ./npins,
}:
let
  pkgs = import sources.nixpkgs { };

  nixos = import (sources.nixpkgs + "/nixos");
  darwin = import sources.nix-darwin;
  lanzaboote = import sources.lanzaboote { inherit pkgs; };

  inherit (pkgs.lib) mkOption types;
in
{
  persephone = nixos {
    configuration = {
      imports = [
        lanzaboote.nixosModules.lanzaboote
        ./machines/persephone.nix
      ];

      options = {
        machine = {
          hostName = mkOption {
            type = types.str;
            description = "The hostname for the machine.";
            default = "persephone";
          };
        };
      };
    };
  };

  hermes = darwin {
    system = "aarch64-darwin";
    nixpkgs = "${sources.nixpkgs}";

    configuration = {
      imports = [
        ./machines/hermes.nix
        {
          nix.registry.nixpkgs.to = {
            type = "path";
            path = sources.nixpkgs;
          };

        }
      ];

      options = {
        machine = {
          hostName = mkOption {
            type = types.str;
            description = "The hostname for the machine.";
            default = "hermes";
          };
        };
      };
    };
  };
}