anchor.diff:  , pytest-xdist
   , sortedcontainers
   , tzdata
  +, pythonOlder
   }:
   buildPythonPackage rec {
     # https://hypothesis.readthedocs.org/en/latest/packaging.html
  
positive.code: 
    pname = "hypothesis";
    version = "6.35.0";
  
    # Use github tarballs that includes tests
    src = fetchFromGitHub {
      owner = "HypothesisWorks";
      repo = "hypothesis-python";
  
negative.code:     sortedcontainers
    ];
  
    checkInputs = [
      pexpect
      pytest-xdist
      pytestCheckHook
    ] ++ lib.optional (pythonAtLeast "3.9") [
      tzdata
    ];
  
    inherit doCheck;
  
  