anchor.diff:      owner = "HypothesisWorks";
       repo = "hypothesis-python";
       rev = "hypothesis-python-${version}";
  -    sha256 = "09bpwp4kdywkmzci969m57w0yy8c31kzwg60vg4mvrmmgyi2cfzv";
  +    hash = "sha256:1ca2dwih65s4r8vazwqm963ywngdr3v854ldnfyny7bvx1v28m8k";
     };
   
     postUnpack = "sourceRoot=$sourceRoot/hypothesis-python";
   
  -  propagatedBuildInputs = [ attrs coverage ] ++ lib.optional (!isPy3k) enum34;
  +  propagatedBuildInputs = [
  +    attrs
  +    coverage
  +    sortedcontainers
  +  ] ++ lib.optional (!isPy3k) enum34;
   
     checkInputs = [ pytest pytest_xdist flaky mock pexpect ];
     inherit doCheck;
  
positive.code:   # pytz fake_factory django numpy pytest
    # If you need these, you can just add them to your environment.
  
    version = "4.41.0";
    pname = "hypothesis";
  
    # Use github tarballs that includes tests
  
negative.code: { lib, buildPythonPackage, fetchFromGitHub
  , isPy3k, attrs, coverage, enum34, pexpect
  , doCheck ? true, pytest, pytest_xdist, flaky, mock
  , sortedcontainers
  }:
  buildPythonPackage rec {
    # https://hypothesis.readthedocs.org/en/latest/packaging.html
  