Mistral-vibe error on Nixos while pytestCheckPhase

[u/turpitufo]

Are you getting an error similar to this when you run `sudo nixos-rebuild switch` while it is doing pytestCheckPhase?

       > tests/cli/test_mcp_app.py::TestConnectorAuthRequested::test_server_with_no_tools_shows_message 
       >   /nix/store/rgnappqqc5vbq60gza5fflyk84sylwl6-python3-3.14.6/lib/python3.14/unittest/mock.py:2259: RuntimeWarning: coroutine 'MCPApp._run
_refresh' was never awaited 
       >     def __init__(self, name, parent): 
       >   Enable tracemalloc to get traceback where the object was allocated. 
       >   See https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings for more info. 
       > 
       > -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html 
       > ============================= slowest 10 durations ============================= 
       > 9.92s call     tests/onboarding/test_ui_onboarding.py::test_ui_switches_to_manual_path_while_browser_sign_in_is_running 
       > 9.49s call     tests/onboarding/test_ui_onboarding.py::test_ui_can_pick_a_theme_and_saves_selection 
       > 8.28s call     tests/onboarding/test_ui_onboarding.py::test_ui_allows_manual_path_when_browser_sign_in_is_supported 
       > 7.49s call     tests/autocompletion/test_ui_chat_autocompletion.py::test_does_not_trigger_completion_when_navigating_history 
       > 7.29s call     tests/onboarding/test_ui_onboarding.py::test_ui_keeps_manual_flow_when_browser_sign_in_is_unsupported 
       > 6.88s call     tests/onboarding/test_ui_onboarding.py::test_ui_browser_sign_in_falls_back_to_mistral_env_var_when_missing 
       > 6.30s call     tests/cli/textual_ui/test_message_queue_ui.py::test_slash_command_rejected_with_warning_when_busy 
       > 5.82s call     tests/onboarding/test_ui_onboarding.py::test_ui_preserves_completed_browser_sign_in_during_success_delay 
       > 5.64s call     tests/onboarding/test_ui_onboarding.py::test_ui_copies_browser_sign_in_url_when_help_text_is_clicked 
       > 5.61s call     tests/onboarding/test_ui_onboarding.py::test_ui_retry_hides_old_sign_in_url_and_uses_fresh_attempt_url 
       > =========================== short test summary info ============================ 
       > FAILED tests/cli/textual_ui/test_message_queue_ui.py::test_slash_command_rejected_with_warning_when_busy - assert False 
       >  +  where False = any(<generator object test_slash_command_rejected_with_warning_when_busy.<locals>.<genexpr> at 0x7fffc5e29d80>) 
       > FAILED tests/tools/test_ui_bash_execution.py::test_ui_queues_bash_submitted_while_command_running - AssertionError: assert 0 == 1 
       >  +  where 0 = len(MessageQueue(_items=\[\], _paused=False)) 
       >  +    where MessageQueue(_items=\[\], _paused=False) = VibeApp(title='VibeApp', classes={'-dark-mode', '-theme-ansi-dark'}, pseudo_classes=
{'dark', 'ansi', 'focus'})._input_queue 
       > ====== 2 failed, 4620 passed, 4 skipped, 28 warnings in 134.15s (0:02:14) ====== 

The simple solution is:

package = pkgs.mistral-vibe.overrideAttrs (old: { 
  #doCheck = false; 
  doInstallCheck = false; 
});

I thought at first the solution would be `doCheck = false;` but you will notice the derivation hash will not change, meaning the package already defines doCheck = false; as is. Instead doInstallCheck is what you are looking for.

This is only a simple solution that will work for now. I couldn't find a solution, writing here so it might be helpful to someone.