anchor.diff: -{ lib, buildPythonPackage, fetchPypi, isPy3k
  +{ lib
  +, buildPythonPackage
  +, fetchPypi
  +, isPy3k
   , hypothesis
   , setuptools-scm
   , six
   , attrs
   , py
   , setuptools
  -, pytest-cov
   , pytest-timeout
   , pytest-tornado
   , mock
  
positive.code:     sha256 = "67767320e971374f701a175aa59abd3a554723039d39fae908e72d16330d648b";
    };
  
    checkInputs = [
      hypothesis
      pytest-cov
      pytest-timeout
      pytest-tornado
      jsonschema
      mock
      tabulate
      pytestCheckHook
    ];
  
    disabledTests = [
      "test_apply_filter_no_repo"
      "test_diff_api_checkpoint"
      "test_filter_cmd_invalid_filter"
      "test_inline_merge"
      "test_interrogate_filter_no_repo"
      "test_merge"
    ];
  
    nativeBuildInputs = [ setuptools-scm ];
  
    propagatedBuildInputs = [
  
negative.code:     GitPython
      notebook
      jinja2
    ];
  
    checkInputs = [
      hypothesis
      pytest-timeout
      pytest-tornado
      jsonschema
      mock
      tabulate
      pytestCheckHook
    ];
  
    disabledTests = [
      "test_apply_filter_no_repo"
      "test_diff_api_checkpoint"
      "test_filter_cmd_invalid_filter"
      "test_inline_merge_source_add"
      "test_inline_merge_source_patches"
      "test_inline_merge_source_replace"
      "test_inline_merge_cells_insertion"
      "test_inline_merge_cells_replacement"
      "test_interrogate_filter_no_repo"
      "test_merge_input_strategy_inline"
    ];
  
    meta = with lib; {
      homepage = "https://github.com/jupyter/nbdime";
  