Nixos-Configuration/modules/nixos/common/deployrs.nix

{ lib, config, ... }:
{
  options.deploy = {
    enable = lib.mkEnableOption "enable deployrs module" // {
      default = true;
    };
    address = lib.mkOption {
      type = lib.types.str;
      default = config.networking.hostName;
    };
  };
}