anchor.diff:      docutils
       GitPython
       jsonschema
  +    nbformat
       psutil
       pyyaml
       ratelimiter
       requests
  +    toposort
       wrapt
     ];
   
     src = python3Packages.fetchPypi {
       inherit pname version;
  -    sha256 = "0s3y5pz9vqxpj5bx8y7ymh3zmsiyrk7sp8zwqwpva3mli7ky81pz";
  +    sha256 = "0n8d5c8sc90kfdw740ad9ffbkg1ic3k1pmlnk68qr4w4vc98pym3";
     };
   
     doCheck = false; # Tests depend on Google Cloud credentials at ${HOME}/gcloud-service-key.json
  
positive.code:       workflows are essentially Python scripts extended by declarative code to define
        rules. Rules describe how to create output files from input files.
      '';
      maintainers = with maintainers; [ helkafen renatoGarcia ];
    };
  }
  
negative.code: 
  python3Packages.buildPythonApplication rec {
    pname = "snakemake";
    version = "5.10.0";
  
    propagatedBuildInputs = with python3Packages; [
      appdirs
  