Bug#1088138: pytorch-ignite: FTBFS: py3versions: empty set of versions

[Santiago Vila]

Package: src:pytorch-ignite
Version: 0.4.12-1
Severity: serious
Tags: ftbfs

Dear maintainer:

During a rebuild of all packages in unstable, your package failed to build:

--------------------------------------------------------------------------------
[...]
dpkg-buildpackage: info: host architecture amd64
  fakeroot debian/rules clean
dh clean -Spybuild --with python3
    dh_auto_clean -O-Spybuild
py3versions: empty set of versions
E: py3versions failed at /usr/share/perl5/Debian/Debhelper/Buildsystem/pybuild.pm line 53.
make: *** [debian/rules:5: clean] Error 1
dpkg-buildpackage: error: fakeroot debian/rules clean subprocess returned exit status 2
--------------------------------------------------------------------------------

The above is just how the build ends and not necessarily the most relevant part.
If required, the full build log is available here:

https://people.debian.org/~sanvila/build-logs/202411/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you could not reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and affects, so that this is still visible in the BTS web
page for this package.

Thanks.