anchor.diff:      export PYTEST_BACKENDS="${backendsString}"
     '';
   
  -  checkPhase = ''
  -    set -euo pipefail
  -
  -    runHook preCheck
  -
  -    pytest --numprocesses auto \
  -      ibis/tests \
  -      ibis/backends/tests \
  -      ibis/backends/{${lib.concatStringsSep "," backends}}/tests \
  -      -k '${lib.concatMapStringsSep " and " (test: "not ${test}") disabledTests}'
  -
  -    runHook postCheck
  -  '';
  -
     pythonImportsCheck = [ "ibis" ] ++ (map (backend: "ibis.backends.${backend}") backends);
   
     meta = with lib; {
  
positive.code:     "test_searched_case_column"
      "test_simple_case_column"
      "test_summary_non_numeric_group_by"
    ];
  
    preCheck = ''
  
negative.code:   ] ++ lib.optionals (pythonOlder "3.8") [ importlib-metadata ];
  
    checkInputs = [
      pytestCheckHook
      click
      pytest
      pytest-mock
  