anchor.diff:      substituteInPlace pytest.ini \
         --replace "--cov=limits" "" \
         --replace "-K" ""
  -    # redis-py-cluster doesn't support redis > 4
  -    substituteInPlace tests/conftest.py \
  -      --replace "import rediscluster" ""
   
       # Recreate _version.py, deleted at fetch time due to non-reproducibility.
       echo 'def get_versions(): return {"version": "${version}"}' > limits/_version.py
  
positive.code:     postFetch = ''
        rm "$out/limits/_version.py"
      '';
      hash = "sha256-1TfwGxEgf6LFYSaNLyVRtJVOnTVNxvswoKMFNWrNOv0=";
    };
  
    propagatedBuildInputs = [
  
negative.code: 
  buildPythonPackage rec {
    pname = "limits";
    version = "2.6.3";
    format = "setuptools";
  
    disabled = pythonOlder "3.7";
  