anchor.diff:    postInstall = ''
       # add Python libs to env so Spyder subprocesses
       # created to run compute kernels don't fail with ImportErrors
  -    wrapProgram $out/bin/spyder3 --prefix PYTHONPATH : "$PYTHONPATH"
  +    wrapProgram $out/bin/spyder --prefix PYTHONPATH : "$PYTHONPATH"
   
       # Create desktop item
       mkdir -p $out/share/icons
  
positive.code:     intervaltree jedi pycodestyle psutil pyflakes rope numpy scipy matplotlib pylint keyring
      numpydoc qtconsole qtawesome nbconvert mccabe pyopengl cloudpickle spyder-kernels
      pygments qtpy pyzmq chardet pyqtwebengine qdarkstyle watchdog python-language-server
      atomicwrites pyxdg diff-match-patch
    ];
  
    # There is no test for spyder
  
negative.code:   psutil, pyflakes, rope, numpy, scipy, matplotlib, pylint, keyring, numpydoc,
    qtconsole, qtawesome, nbconvert, mccabe, pyopengl, cloudpickle, pygments,
    spyder-kernels, qtpy, pyzmq, chardet, qdarkstyle, watchdog, python-language-server
  , pyqtwebengine, atomicwrites, pyxdg, diff-match-patch, three-merge, pyls-black, pyls-spyder
  }:
  
  buildPythonPackage rec {
  