anchor.diff:  
     checkInputs = [
       ipykernel
  +    pandoc
       pytestCheckHook
  +    pytest-console-scripts
  +    pytest-timeout
       pytest-tornasync
       requests
     ];
  
positive.code: 
  buildPythonPackage rec {
    pname = "jupyter_server";
    version = "1.11.2";
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "c1f32e0c1807ab2de37bf70af97a36b4436db0bc8af3124632b1f4441038bf95";
    };
  
    patches = [ (fetchpatch
      { name = "Normalize-file-name-and-path.patch";
        url = "https://github.com/jupyter-server/jupyter_server/pull/608/commits/345e26cdfd78651954b68708fa44119c2ac0dbd5.patch";
        sha256 = "1kqz3dyh2w0h1g1fbvqa13q17hb6y32694rlaasyg213mq6g4k32";
      })
    ];
  
    propagatedBuildInputs = [
      argon2-cffi
  
negative.code: { lib
  , stdenv
  , buildPythonPackage
  , fetchPypi
  , pythonOlder
  , pandoc
  , pytestCheckHook
  , pytest-console-scripts
  , pytest-timeout
  , pytest-tornasync
  , argon2-cffi
  , jinja2
  