{ ... }:
{
  config = {
    # AWS settings require this
    permitRootLogin = "prohibit-password";

    # Make sure disk size is large enough
    # https://github.com/nix-community/nixos-generators/issues/150
    formatConfigs.amazon =
      { config, ... }:
      {
        amazonImage.sizeMB = 16 * 1024;
      };
  };
}