`setuptools` > 81 doesn't include `pkg_resources`

[daeho-ro]

So, it causes an error as follows.

Traceback (most recent call last):
  File "/home/linuxbrew/.linuxbrew/Cellar/python@3.14/3.14.3_1/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
    main()
    ~~~~^^
  File "/home/linuxbrew/.linuxbrew/Cellar/python@3.14/3.14.3_1/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
    json_out["return_val"] = hook(**hook_input["kwargs"])
                             ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/linuxbrew/.linuxbrew/Cellar/python@3.14/3.14.3_1/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
    return hook(config_settings)
  File "/var/tmp/pip-build-env-gebowctx/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 333, in get_requires_for_build_wheel
    return self._get_build_requires(config_settings, requirements=[])
           ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/tmp/pip-build-env-gebowctx/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
    self.run_setup()
    ~~~~~~~~~~~~~~^^
  File "/var/tmp/pip-build-env-gebowctx/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 520, in run_setup
    super().run_setup(setup_script=setup_script)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/tmp/pip-build-env-gebowctx/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 317, in run_setup
    exec(code, locals())
    ~~~~^^^^^^^^^^^^^^^^
  File "<string>", line 9, in <module>
ModuleNotFoundError: No module named 'pkg_resources'
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> No available output.