{
  network.description = "My first nix cluster";
  network.enableRollback = true;

  nixos-01 = {config, pkgs,...}:
  {
    imports = [ ./config-extra.nix ];
    environment.systemPackages = with pkgs; [mc];
    deployment.targetHost = "192.168.0.145";
  };

  nixos-02 = {
    imports = [ ./config-extra.nix ];
    deployment.targetHost = "192.168.0.146";
  };
}