anchor.diff:  { stdenv
   , buildPythonPackage
   , fetchPyPi
  +, lib
   
   , attrs
   , pyasn1
  
positive.code: }:
  
  let
    inherit (stdenv.lib)
      optionals;
  
    version = "16.0.0";
  in
  buildPythonPackage rec {
    name = "service_identity-${version}";
  
negative.code: 
    doCheck = true;
  
    meta = with lib; {
      description = "Service identity verification for pyOpenSSL";
      homepage = https://github.com/pyca/service_identity;
      license = licenses.bsd3;
  