anchor.diff:    ] ++ lib.optionals (pythonOlder "3.8") [ importlib-metadata ];
   
     checkInputs = [
  +    pytestCheckHook
       click
       pytest
       pytest-mock
  
positive.code:     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; {
  
negative.code: , buildPythonPackage
  , fetchFromGitHub
  , pythonOlder
  , pytestCheckHook
  , atpublic
  , cached-property
  , clickhouse-driver
  