anchor.diff:      rm -f _line_profiler.c
     '';
   
  +  checkInputs = [
  +    ipython
  +  ];
  +
     checkPhase = ''
  -    ${python.interpreter} -m unittest discover -s tests
  +    PYTHONPATH=$out/${python.sitePackages}:$PYTHONPATH cd tests && ${python.interpreter} -m unittest discover -s .
     '';
   
     meta = {
  
positive.code: , ipython
  , python
  , scikit-build
  }:
  
  buildPythonPackage rec {
  
negative.code:     sha256 = "7218ad6bd81f8649b211974bf108933910f016d66b49651effe7bbf63667d141";
    };
  
    nativeBuildInputs = [
      cython
      cmake
      scikit-build
    ];
  
    dontUseCmakeConfigure = true;
  
    propagatedBuildInputs = [
      ipython
    ];
  
    disabled = isPyPy;
  
  