anchor.diff:  , msgpack
   , pytestCheckHook
   , numpy
  +, pandas
   , pydantic
   , pymongo
   , ruamel_yaml
  
positive.code: 
  buildPythonPackage rec {
    pname = "monty";
    version = "2021.6.10";
    disabled = pythonOlder "3.5"; # uses type annotations
  
    # No tests in Pypi
    src = fetchFromGitHub {
      owner = "materialsvirtuallab";
      repo = pname;
      rev = "v${version}";
      sha256 = "01fhl4pl5gj4ahph4lxcm0fmglh0bjw6jz9ckmgzviasg4l1j6h4";
    };
  
    propagatedBuildInputs = [
      ruamel_yaml
  
negative.code:   checkInputs = [
      pytestCheckHook
      numpy
      pandas
      pydantic
      pymongo
    ];
  
    meta = with lib; {
      description = "Serves as a complement to the Python standard library by providing a suite of tools to solve many common problems";
  