anchor.diff:    version = "2018.2.2";
   
     checkInputs = [ pytest ];
  -  buildInputs = [ opencl-headers ocl-icd ];
  +  buildInputs = [ opencl-headers ocl-icd pybind11 ];
   
     propagatedBuildInputs = [ numpy cffi pytools decorator appdirs six Mako ];
   
  
positive.code: , six
  , opencl-headers
  , ocl-icd
  }:
  
  buildPythonPackage rec {
  
negative.code:     substituteInPlace setup.py --replace "pytest>=2" ""
    '';
  
    preBuild = ''
      export HOME=$(mktemp -d)
    '';
  
    # gcc: error: pygpu_language_opencl.cpp: No such file or directory
    doCheck = false;
  
  