* Getting build dependencies for wheel...

Traceback (most recent call last):
  File "/immortalwrt/master/staging_dir/hostpkg/lib/python3.14/site-packages/pyproject_hooks/_impl.py", line 423, in _call_hook
    raise BackendUnavailable(
    ...<4 lines>...
    )
pyproject_hooks._impl.BackendUnavailable: Cannot import 'maturin'

Traceback:
Traceback (most recent call last):
  File "/immortalwrt/master/staging_dir/hostpkg/lib/python3.14/site-packages/pyproject_hooks/_in_process/_in_process.py", line 75, in _build_backend
    obj = import_module(mod_path)
  File "/immortalwrt/master/staging_dir/target-arm_arm1176jzf-s+vfp_musl_eabi/usr/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1406, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1335, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'maturin'

TIP pass --env-dir and --sdist-extract-dir to keep the build environment and sources, then see https://build.pypa.io/en/stable/how-to/troubleshooting.html#debug-a-failed-build for help debugging a failed build
ERROR Backend 'maturin' is not available.
make[2]: *** [Makefile:47: /immortalwrt/master/build_dir/target-arm_arm1176jzf-s+vfp_musl_eabi/pypi/rpds_py-2026.9.1/.built] Error 1
time: package/feeds/packages/python-rpds-py/compile#1.13#0.08#1.42