Trac #29851: tox.ini: debian-bullseye, -sid have Python3.8 instead of…

… 3.7

As per the wiki, running

{{{

build/bin/write-dockerfile.sh debian "@(standard|optional)" > Dockerfile
}}}

Generates a Dockerfile, but running the dockerfile fails because Debian
(at least) comes with Python3.8, not 3.7. This can be fixed by changing
the file build/pkgs/python3/distros/debian.txt, but I don't know if that
will have unexpected consequences.

URL: https://trac.sagemath.org/29851
Reported by: gh-cduston44
Ticket author(s): Matthias Koeppe
Reviewer(s): Jonathan Kliem

tox.ini

@@ -152,8 +152,11 @@ setenv =
     debian-stretch:   BASE_TAG=stretch
     debian-stretch:                            IGNORE_MISSING_SYSTEM_PACKAGES=yes
     debian-buster:    BASE_TAG=buster
+    # debian-bullseye and -sid do not have libpython3.7-dev any more
     debian-bullseye:  BASE_TAG=bullseye
+    debian-bullseye:                           IGNORE_MISSING_SYSTEM_PACKAGES=yes
     debian-sid:       BASE_TAG=sid
+    debian-sid:                                IGNORE_MISSING_SYSTEM_PACKAGES=yes
     #
     # https://hub.docker.com/u/linuxmintd
     #