TST: pyinstaller job broken with ModuleNotFoundError: No module named 'backports' #18982
Description
Looks like it has been failing for a few days.
Last success: https://github.com/astropy/astropy/actions/runs/19558814407
First failure: https://github.com/astropy/astropy/actions/runs/19589458395/job/56105080108
astropy/.pyinstaller> ./run_astropy_tests --astropy-root /home/runner/work/astropy/astropy
Traceback (most recent call last):
File "pyi_rth_pkgres.py", line 177, in <module>
File "pyi_rth_pkgres.py", line 44, in _pyi_rthook
File "pyimod02_importers.py", line 457, in exec_module
File "pkg_resources/__init__.py", line 90, in <module>
File "pyimod02_importers.py", line 457, in exec_module
File "setuptools/_vendor/jaraco/text/__init__.py", line 12, in <module>
File "pyimod02_importers.py", line 457, in exec_module
File "setuptools/_vendor/jaraco/context.py", line 17, in <module>
ModuleNotFoundError: No module named 'backports'
[PYI-4900:ERROR] Failed to execute script 'pyi_rth_pkgres' due to unhandled exception!