anchor.diff:  { lib
   , buildPythonPackage
   , fetchFromGitHub
  -, isPy27
  -, pytest-runner
  +, pythonOlder
   , pytestCheckHook
   , torch
   }:
  
positive.code:     sha256 = "0ki0njhmz1i3pkpr3y6h6ac7p5qh1kih06mknc2s18mfw34f2l55";
    };
  
    propagatedBuildInputs = [ torch ];
  
    checkInputs = [ pytest-runner pytestCheckHook ];
    disabledTests = [
      "test_inplace_on_requires_grad"
      "test_input_requiring_grad"
  
negative.code:   pname = "torchgpipe";
    version = "0.0.7";
  
    disabled = pythonOlder "3.6";
  
    src = fetchFromGitHub {
      owner = "kakaobrain";
  