anchor.diff:      })
     ];
   
  +  postPatch = ''
  +    substituteInPlace soundfile.py --replace "_find_library('sndfile')" "'${libsndfile.out}/lib/libsndfile${stdenv.hostPlatform.extensions.sharedLibrary}'"
  +  '';
  +
     checkInputs = [ pytest ];
     propagatedBuildInputs = [ numpy libsndfile cffi ];
     propagatedNativeBuildInputs = [ cffi ];
  
positive.code:   meta = {
      description = "An audio library based on libsndfile, CFFI and NumPy";
      license = lib.licenses.bsd3;
      homepage = "https://github.com/bastibe/PySoundFile";
      maintainers = with lib.maintainers; [ fridh ];
    };
  
    postPatch = ''
      substituteInPlace soundfile.py --replace "_find_library('sndfile')" "'${libsndfile.out}/lib/libsndfile${stdenv.hostPlatform.extensions.sharedLibrary}'"
    '';
  
    # https://github.com/bastibe/PySoundFile/issues/157
    disabled = isPyPy ||  stdenv.isi686;
  
  }
  
negative.code: buildPythonPackage rec {
    pname = "soundfile";
    version = "0.10.3.post1";
    # https://github.com/bastibe/python-soundfile/issues/157
    disabled = isPyPy || stdenv.isi686;
  
    src = fetchPypi {
      pname = "SoundFile";
  