Hi,

During a rebuild of all packages in sid, your package failed to build
on amd64.


Relevant part (hopefully):
The full build log is available from:
http://qa-logs.debian.net/2023/10/27/python-igraph_0.11.2+ds-4_unstable.log

All bugs filed during this archive rebuild are listed at:
https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=ftbfs-20231027;users=lucas@debian.org
or:
https://udd.debian.org/bugs/?release=na&merged=ign&fnewerval=7&flastmodval=7&fusertag=only&fusertagtag=ftbfs-20231027&fusertaguser=lucas@debian.org&allbugs=1&cseverity=1&ctags=1&caffected=1#results

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

If you reassign this bug to another package, please mark it as 'affects'-ing
this package. See https://www.debian.org/Bugs/server-control#affects

If you fail to reproduce this, please provide a build log and diff it with mine
so that we can identify if something relevant changed in the meantime.

This doesn't fail anymore. Closing.

ARPACK 3.9.1, which we already have.)

This is still happening, and also affects autopkgtests:
https://ci.debian.net/packages/p/python-igraph/testing/arm64/64426610/
https://ci.debian.net/packages/p/python-igraph/testing/s390x/64684742/

It seems to happen around 2% of the time.