include
  S.V3
    with type session = [ `Ssl_not_compiled_in ]
     and type ssl_version = [ `Ssl_not_compiled_in ]
     and type ssl_conn = [ `Ssl_not_compiled_in ]
     and type ssl_opt = [ `Ssl_not_compiled_in ]
     and type allowed_ciphers =
      [ `Only of string list | `Openssl_default | `Secure ]
