anchor.diff:      owner = "KevinMusgrave";
       repo = pname;
       rev = "refs/tags/v${version}";
  -    sha256 = "sha256-ge6y5n1N/+nymgD4La3ger7N4vvcoo1Bxa+etirNFNI=";
  +    sha256 = "sha256-d7Ngd4SzGTJXtpgs2Jqb+y1aeMt9YUqIOft5ByDtRsc=";
     };
   
     propagatedBuildInputs = [
  
positive.code:     changelog = "https://github.com/KevinMusgrave/pytorch-metric-learning/releases/tag/v${version}";
      license = lib.licenses.mit;
      maintainers = with lib.maintainers; [ bcdarwin ];
      broken = true;  # requires faiss which is unpackaged
    };
  }
  
negative.code:     export TEST_DEVICE=cpu
      export TEST_DTYPES=float32,float64  # half-precision tests fail on CPU
    '';
  
    # package only requires `unittest`, but use `pytest` to exclude tests
    checkInputs = [
      faiss
      pytestCheckHook
    ];
  
    disabledTests = [
      # TypeError: setup() missing 1 required positional argument: 'world_size'
      "TestDistributedLossWrapper"
      # require network access:
      "TestInference"
      "test_get_nearest_neighbors"
      "test_tuplestoweights_sampler"
      "test_untrained_indexer"
  