anchor.diff:      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
     };
   }
  
positive.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 = [ pytestCheckHook ];
    disabledTests = [
      # requires FAISS (not in Nixpkgs)
      "test_accuracy_calculator_and_faiss"
      "test_global_embedding_space_tester"
      "test_with_same_parent_label_tester"
      # require network access:
      "test_get_nearest_neighbors"
      "test_tuplestoweights_sampler"
      "test_untrained_indexer"
  
negative.code:     owner = "KevinMusgrave";
      repo = pname;
      rev = "refs/tags/v${version}";
      sha256 = "sha256-d7Ngd4SzGTJXtpgs2Jqb+y1aeMt9YUqIOft5ByDtRsc=";
    };
  
    propagatedBuildInputs = [
  