{
  config,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib)
    mkAliasOptionModule
    mkOption
    types
    ;
in
{
  options.machine = {
    mainUser = mkOption {
      type = types.str;
      description = "The main user of the machine";
    };

    hostName = mkOption {
      type = types.str;
      description = "The name of the machine";
    };

    filesystem.uuid = {
      boot = mkOption {
        type = types.nullOr types.str;
        description = "The UUID of the XBOOTLDR partition.";
        default = null;
      };

      esp = mkOption {
        type = types.nullOr types.str;
        description = "The UUID of the ESP.";
        default = null;
      };

      luks = mkOption {
        type = types.nullOr types.str;
        description = "The UUID of the encrypted root partition.";
        default = null;
      };

      cryptroot = mkOption {
        type = types.nullOr types.str;
        description = "The UUID of the decrypted root partition.";
        default = null;
      };
    };
  };

  config = lib.mkIf pkgs.stdenv.hostPlatform.isLinux {
    assertions = [
      {
        assertion = config.machine.filesystem.uuid.boot != null;
        message = "machine.filesystem.uuid.boot must be set on Linux systems";
      }
      {
        assertion = config.machine.filesystem.uuid.esp != null;
        message = "machine.filesystem.uuid.esp must be set on Linux systems";
      }
      {
        assertion = config.machine.filesystem.uuid.luks != null;
        message = "machine.filesystem.uuid.luks must be set on Linux systems";
      }
      {
        assertion = config.machine.filesystem.uuid.cryptroot != null;
        message = "machine.filesystem.cryptroot.esp must be set on Linux systems";
      }
    ];
  };
}