anchor.diff:  , nose
   , msgpack
   , greenlet
  -, trollius ? null
   , pythonOlder
   , isPyPy
   , pytestrunner
  
positive.code: buildPythonPackage rec {
    pname = "pynvim";
    version = "0.4.3";
  
    src = fetchPypi {
      inherit pname version;
  
negative.code:   doCheck = false;
  
    propagatedBuildInputs = [ msgpack ]
      ++ lib.optional (!isPyPy) greenlet;
  
    meta = {
      description = "Python client for Neovim";
  