CI test failure

[dschwoerer]

Collecting netcdf4==1.4.2
  Downloading netCDF4-1.4.2.tar.gz (769 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 769.8/769.8 kB 88.3 MB/s eta 0:00:00
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Installing backend dependencies: started
  Installing backend dependencies: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'error'
  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [18 lines of output]
      <string>:170: DeprecationWarning: The SafeConfigParser class has been renamed to ConfigParser in Python 3.2. This alias will be removed in future versions. Use ConfigParser directly instead.
      reading from setup.cfg...
      using nc-config ...
      Traceback (most recent call last):
        File "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 149, in prepare_metadata_for_build_wheel
          return hook(metadata_directory, config_settings)
        File "/tmp/pip-build-env-2r1cxalb/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 366, in prepare_metadata_for_build_wheel
          self.run_setup()
        File "/tmp/pip-build-env-2r1cxalb/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 480, in run_setup
          super(_BuildMetaLegacyBackend, self).run_setup(setup_script=setup_script)
        File "/tmp/pip-build-env-2r1cxalb/overlay/lib/python3.8/site-packages/setuptools/build_meta.py", line 311, in run_setup
          exec(code, locals())
        File "<string>", line 457, in <module>
      ModuleNotFoundError: No module named 'numpy'
      [end of output]

I think that is an error in netCDF4-1.4.2 - not sure we can do a lot about that?

[ZedThree]

This is because there's no built wheel for 1.4.2 on py3.8, and building netcdf4 from source is a little painful. We should drop support for py3.8 entirely (see NEP 29), and bump the minimum netcdf4 to 1.5.8