these 3 derivations will be built:
  /nix/store/l20s8hhnijy2ff3q7kirxkjsai85j5vl-source.drv
  /nix/store/cibzm0m7afaf4lvvh5n4ipc9pm5jw9dy-mcptoon-0.8.18.drv
  /nix/store/wwmvakq8qjvwqc461si3yvibdpbisipx-check-mcptoon.drv
error: Cannot build '/nix/store/cibzm0m7afaf4lvvh5n4ipc9pm5jw9dy-mcptoon-0.8.18.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6qb6m496l1d7fpms2bx6fg6lrxvfbmkn-mcptoon-0.8.18
         /nix/store/m2rvr8g2wmi55dxb8di6awpb42ampir3-mcptoon-0.8.18-dist
       Last 25 log lines:
       >         Pin the real function (not a mock) against a stdlib module that is
       >         importable everywhere — this is the check that keeps a bare
       >         `find_spec(module)` from writing a dead server entry.
       >         """
       > >       assert discover_mod._resolve_local_module("json") is None
       > E       AssertionError: assert ['/nix/store/d64q19q1xjdwfhqx6czvrjgrhq0n3lcc-python3-3.14.7/bin/python3.14', '-m', 'json'] is None
       > E        +  where ['/nix/store/d64q19q1xjdwfhqx6czvrjgrhq0n3lcc-python3-3.14.7/bin/python3.14', '-m', 'json'] = <function _resolve_local_module at 0x7ffff5213a00>('json')
       > E        +    where <function _resolve_local_module at 0x7ffff5213a00> = discover_mod._resolve_local_module
       >
       > tests/test_discover.py:472: AssertionError
       > =============================== warnings summary ===============================
       > ../../nix/store/fwqp3f54vqakq82lfrpiw908xi1iln0w-python3.14-pytest-9.1.1/lib/python3.14/site-packages/_pytest/config/__init__.py:1464
       >   /nix/store/fwqp3f54vqakq82lfrpiw908xi1iln0w-python3.14-pytest-9.1.1/lib/python3.14/site-packages/_pytest/config/__init__.py:1464: PytestConfigWarning: Unknown config option: timeout
       >
       >     self._warn_or_fail_if_strict(f"Unknown config option: {key}\n")
       >
       > ../../nix/store/fwqp3f54vqakq82lfrpiw908xi1iln0w-python3.14-pytest-9.1.1/lib/python3.14/site-packages/_pytest/config/__init__.py:1464
       >   /nix/store/fwqp3f54vqakq82lfrpiw908xi1iln0w-python3.14-pytest-9.1.1/lib/python3.14/site-packages/_pytest/config/__init__.py:1464: PytestConfigWarning: Unknown config option: timeout_method
       >
       >     self._warn_or_fail_if_strict(f"Unknown config option: {key}\n")
       >
       > -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
       > =========================== short test summary info ============================
       > FAILED tests/test_discover.py::TestPreferInstalledRunners::test_a_module_without_main_is_not_runnable - AssertionError: assert ['/nix/store/d64q19q1xjdwfhqx6czvrjgrhq0n3lcc-python...
       > = 1 failed, 2061 passed, 12 skipped, 4 deselected, 2 warnings in 80.12s (0:01:20) =
       For full logs, run:
         nix log /nix/store/cibzm0m7afaf4lvvh5n4ipc9pm5jw9dy-mcptoon-0.8.18.drv
error: Cannot build '/nix/store/wwmvakq8qjvwqc461si3yvibdpbisipx-check-mcptoon.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/rhy08yy8hwq0rkazkcw6npyrc82ma462-check-mcptoon