anchor.diff:  , scikit-learn
   , scipy
   , pytestCheckHook
  +, pythonOlder
   }:
   
   buildPythonPackage rec {
  
positive.code:     pytestCheckHook
    ];
  
    meta = with lib; {
      description = "Nearest Neighbor Descent";
      homepage = "https://github.com/lmcinnes/pynndescent";
  
negative.code:   version = "0.5.6";
    format = "setuptools";
  
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
      hash = "sha256-YfsxiFuqxGnWeTPix8k1tu3rsG7kmOLw+d/JfFnTclw=";
    };
  
    propagatedBuildInputs = [
  