anchor.diff:  
     doCheck = true;
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "Service identity verification for pyOpenSSL";
       homepage = https://github.com/pyca/service_identity;
       license = licenses.bsd3;
  
positive.code:   src = fetchPyPi {
      package = "service_identity";
      inherit version;
      sha256 = "0630e222f59f91f3db498be46b1d879ff220955d7bbad719a5cb9ad14e3c3036";
    };
  
    propagatedBuildInputs = [
  
negative.code: { stdenv
  , buildPythonPackage
  , fetchPyPi
  , lib
  
  , attrs
  , pyasn1
  