anchor.diff: -{ lib, buildPythonPackage, fetchPypi, pythonOlder
  +{ lib
  +, bash
  +, buildPythonPackage
  +, chardet
   , docker
  +, entrypoints
   , escapism
  +, fetchFromGitHub
  +, iso8601
   , jinja2
   , pkgs-docker
   , python-json-logger
  +, pythonOlder
   , pyyaml
   , ruamel_yaml
   , semver
  
positive.code: }:
  
  buildPythonPackage rec {
    version = "2021.8.0";
    pname = "jupyter-repo2docker";
    disabled = pythonOlder "3.4";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "9d1b3c3ec7944ea6b0a234d6fa77293a2d1ed1c080eba8466aba94f811b3465d";
    };
  
    propagatedBuildInputs = [
      docker
      escapism
      jinja2
      pkgs-docker
      python-json-logger
  
negative.code:     traitlets
    ];
  
    # Tests require a running Docker instance
    doCheck = false;
  
    pythonImportsCheck = [
  