nixops + nixos

deploy.nix

{
  network.description = "my nixops network";

  vm1 = { config, pkgs, ... }:
    {
      deployment =
        { targetEnv = "none";
          targetHost = "0.0.0.0";
        };

      require =
        [ ./myhost.nix
        ];
    };
}

myhost.nix

{ config, pkgs, ... }:

{
  networking.hostName = "myhost";
  services.openssh.enable = true;
}