New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/34030#issuecomment-968369692

Comment:
New on sagemath-9.5.beta6_3:
     - add depends needed for runtime and for testing
     - add `python_version=3`
     - disable skipping `03-rewrite-python-shebang` as it seems to be harmless after adding `python_version=3` (unexpected... let's try and be alert in case problems arise)
     - fix cleaning up of `$wrksrc` and `$_SAGE_ROOT`
     - use `sage-${version}_${revision}` for the binary symlink; this way it won't override whatever sage is installed in the system so I can test on a live system.

The doctest failures for `sympow` should be fixed when #34077 is merged.

At some point I plan on:
 - investigating all the doctest failures, try to fix them or find a workaround (goal: enable check and still have CI pass)
 - investigate https://trac.sagemath.org/ticket/30766 to see if we can get it working on system python 3.10.
 - add more packages to void:
    - standard pkgs missing: `brial cliquer gfan libbraiding libhomfly lrcalc nauty palp pdf2svg tachyon`
    - optional pkgs missing: `4ti2 coxeter3 libnauty libsemigroups lrslib perl_mongodb`

Note that https://trac.sagemath.org/ticket/30766 mentions some updates necessary to support python 3.10, some of which we don't have, namely:
 - `python3-Babel` update to 2.9.1
 - `python3-traitlets` update to 5.1.1
 - `python3-distlib` update to 0.3.3

Most probably I won't have time to follow up much on this PR before next weekend.