anchor.diff:  
   buildPythonPackage rec {
     pname = "aiokafka";
  -  version = "0.7.0";
  -
  -  disabled = isPy27;
  +  version = "0.7.1";
  +  disabled = pythonOlder "3.6";
   
     src = fetchFromGitHub {
       owner = "aio-libs";
  -    repo = "aiokafka";
  +    repo = pname;
       rev = "v${version}";
  -    sha256 = "16pcgv38syqy6sj3w7zx95zgynpd642n3i95dpiw0ivhpqrxxhrf";
  +    sha256 = "sha256-D89ppIUliJJMDuCySrZUyN6Rlm01gFskz6ayHmqploc=";
     };
   
     nativeBuildInputs = [
  
positive.code: { lib
  , buildPythonPackage
  , fetchFromGitHub
  , isPy27
  , kafka-python
  , cython
  , zlib
  
negative.code: 
    propagatedBuildInputs = [
      kafka-python
    ] ++ lib.optionals (pythonOlder "3.7") [
      dataclasses
    ];
  
    # checks require running kafka server
    doCheck = false;
  
    pythonImportsCheck = [ "aiokafka" ];
  
    meta = with lib; {
      description = "Kafka integration with asyncio";
  