anchor.diff:  , buildPythonPackage
   , confluent-kafka
   , distributed
  +, fetchpatch
   , fetchPypi
   , flaky
   , graphviz
  
positive.code: 
    src = fetchPypi {
      inherit pname version;
      sha256 = "sha256-0wZ1ldLFRAIL9R+gLfwsFbL+gvdORAkYWNjnDmeafm8=";
    };
  
    patches = [
  
negative.code: , toolz
  , tornado
  , zict
  }:
  
  buildPythonPackage rec {
  