anchor.diff:  { lib, buildPythonPackage, fetchPypi, isPy27
   , aiodns
   , aiohttp
  +, flask
   , mock
   , msrest
   , pytest
  
positive.code:   checkInputs = [
      aiodns
      aiohttp
      mock
      msrest
      pytest
  
negative.code: }:
  
  buildPythonPackage rec {
    version = "1.16.0";
    pname = "azure-core";
    disabled = isPy27;
  
    src = fetchPypi {
      inherit pname version;
      extension = "zip";
      sha256 = "b1c7d2e01846074f258c8b2e592239aef836a2b1c27d8d0e8491a2c7e2906ef4";
    };
  
    propagatedBuildInputs = [
  