Bug#1008925: pytorch-vision FTBFS with Python 3.10 due to X-Python3-Version: 3.9

[Adrian Bunk <bunk@debian.org>]

Source: pytorch-vision
Version: 0.8.2-1
Severity: serious
Tags: ftbfs bookworm sid

https://buildd.debian.org/status/logs.php?pkg=pytorch-vision&ver=0.8.2-1%2Bb3

...
dh clean -Spybuild --with python3
   dh_auto_clean -O-Spybuild
I: pybuild base:237: python3.9 setup.py clean 
Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/setup.py", line 12, in <module>
    import torch
  File "/usr/lib/python3/dist-packages/torch/__init__.py", line 213, in <module>
    raise ImportError(textwrap.dedent('''
ImportError: Failed to load PyTorch C extensions:
    It appears that PyTorch has loaded the `torch/_C` folder
    of the PyTorch repository rather than the C extensions which
    are expected in the `torch._C` namespace. This can occur when
    using the `install` workflow. e.g.
        $ python setup.py install && python -c "import torch"

    This error can generally be solved using the `develop` workflow
        $ python setup.py develop && python -c "import torch"  # This should succeed
    or by running Python from a different directory.
E: pybuild pybuild:367: clean: plugin distutils failed with: exit code=1: python3.9 setup.py clean 
dh_auto_clean: error: pybuild --clean -i python{version} -p 3.9 returned exit code 13
make: *** [debian/rules:6: clean] Error 25


https://sources.debian.org/src/pytorch-vision/0.8.2-1/debian/control/#L28