anchor.diff: -{ stdenv
  -, lib
  +{ lib
  +, stdenv
  +, async-timeout
   , buildPythonPackage
   , fetchFromGitHub
   , ifaddr
  
positive.code: 
  buildPythonPackage rec {
    pname = "zeroconf";
    version = "0.38.7";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  
negative.code:     owner = "jstasiak";
      repo = "python-zeroconf";
      rev = version;
      hash = "sha256-R6q5fq8P91q+qhy+lOCuoKUMFBvkKFsKLVCoqIy7Qpk=";
    };
  
    propagatedBuildInputs = [
      async-timeout
      ifaddr
    ];
  
  