3.6.0: pep517 basedbuild is failing

Problem description

Looks like pep517 based build is failing.

```console + /usr/bin/python3 -sBm build -w --no-isolation * Getting build dependencies for wheel... :10: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html Traceback (most recent call last): File "/usr/lib/python3.8/site-packages/pyproject_hooks/_in_process/_in_process.py", line 353, in main() File "/usr/lib/python3.8/site-packages/pyproject_hooks/_in_process/_in_process.py", line 335, in main json_out['return_val'] = hook(**hook_input['kwargs']) File "/usr/lib/python3.8/site-packages/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel return hook(config_settings) File "/usr/lib/python3.8/site-packages/setuptools/build_meta.py", line 341, in get_requires_for_build_wheel return self._get_build_requires(config_settings, requirements=['wheel']) File "/usr/lib/python3.8/site-packages/setuptools/build_meta.py", line 323, in _get_build_requires self.run_setup() File "/usr/lib/python3.8/site-packages/setuptools/build_meta.py", line 338, in run_setup exec(code, locals()) File "", line 76, in TypeError: 'type' object is not subscriptable ```

Expected Output

build should not fail.

Environment Information

Here is list of installed modules in build env

```console Package Version ----------------------------- --------- alabaster 0.7.13 asttokens 2.2.1 Babel 2.12.1 backcall 0.2.0 build 0.10.0 certifi 2022.12.7 charset-normalizer 3.1.0 Cython 0.29.35 decorator 5.1.1 distro 1.8.0 docutils 0.19 exceptiongroup 1.1.1 executing 1.2.0 gpg 1.20.0 idna 3.4 imagesize 1.4.1 importlib-metadata 6.7.0 iniconfig 2.0.0 installer 0.7.0 ipython 8.12.0 jedi 0.18.2 Jinja2 3.1.2 libcomps 0.1.19 MarkupSafe 2.1.2 matplotlib-inline 0.1.6 numpy 1.24.3 packaging 23.1 pandas 2.0.3 parso 0.8.3 pexpect 4.8.0 pickleshare 0.7.5 pluggy 1.0.0 prompt-toolkit 3.0.38 ptyprocess 0.7.0 pure-eval 0.2.2 Pygments 2.15.1 pyproject_hooks 1.0.0 pytest 7.4.0 python-dateutil 2.8.2 pytz 2023.2 requests 2.31.0 setuptools 68.0.0 six 1.16.0 snowballstemmer 2.2.0 Sphinx 6.2.1 sphinx-argparse 0.4.0 sphinxcontrib-applehelp 1.0.4 sphinxcontrib-devhelp 1.0.2 sphinxcontrib-htmlhelp 2.0.0 sphinxcontrib-jsmath 1.0.1 sphinxcontrib-qthelp 1.0.3 sphinxcontrib-serializinghtml 1.1.5 stack-data 0.6.2 tomli 2.0.1 traitlets 5.9.0 typing_extensions 4.6.3 urllib3 1.26.15 wcwidth 0.2.6 wheel 0.40.0 xarray 2022.12.0 zipp 3.15.0 ```

pyproj4 / pyproj