anchor.diff:  
     src = python3Packages.fetchPypi {
       inherit pname version;
  -    sha256 = "b83f3ef73e25dafcb39b3565030e33fa2f7e80ed70256c535dc7e58ea762305d";
  +    sha256 = "2367ce91baf7f8fa7738d33aff9670ffdf5410bbac49aeb209f73b45a3425046";
     };
   
     doCheck = false; # Tests depend on Google Cloud credentials at ${HOME}/gcloud-service-key.json
  
positive.code:     jsonschema
      nbformat
      psutil
      pyyaml
      ratelimiter
      requests
  
negative.code: 
  python3Packages.buildPythonApplication rec {
    pname = "snakemake";
    version = "5.28.0";
  
    propagatedBuildInputs = with python3Packages; [
      appdirs
  