fails autopkg tests with setuptools v84:

[...]
142s ------------------------------ Captured log call
-------------------------------
142s INFO     root:dist.py:1044 running build_ext
142s INFO     root:build_ext.py:552 building 'apackage.mymodule' extension
142s INFO     compilers.C.base:base.py:1176 x86_64-linux-gnu-g++
-fno-strict-overflow -Wsign-compare -DNDEBUG -g -O2 -Wall -fPIC 
-I/usr/lib/python3/dist-packages/pybind11/include 
-I/usr/lib/python3/dist-packages/pybind11/include 
-I/tmp/autopkgtest.x4Pmqg/autopkgtest_tmp/tests/apackage 
-I/usr/include/python3.14 -c 
/tmp/autopkgtest.x4Pmqg/autopkgtest_tmp/tests/apackage/.rendered.mymodule.cpp
-o 
/tmp/tmpw6muievg/tmp/autopkgtest.x4Pmqg/autopkgtest_tmp/tests/apackage/.rendered.mymodule.o
-std=c++11
142s INFO     compilers.C.base:base.py:1176 x86_64-linux-gnu-g++
-fno-strict-overflow -Wsign-compare -DNDEBUG -g -O2 -Wall -shared 
-Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 
/tmp/tmpw6muievg/tmp/autopkgtest.x4Pmqg/autopkgtest_tmp/tests/apackage/.rendered.mymodule.o
-L/usr/lib/x86_64-linux-gnu -o 
/tmp/tmpw6muievg/apackage/mymodule.cpython-314-x86_64-linux-gnu.so
142s _____________________________ test_relative_import

We believe that the bug you reported is fixed in the latest version of
cppimport, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1147333@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Alexandre Detiste <tchet@debian.org> (supplier of updated cppimport package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 12 Sep 2026 14:26:31 +0200
Source: cppimport
Architecture: source
Version: 26.04.17-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <team+python@tracker.debian.org>
Changed-By: Alexandre Detiste <tchet@debian.org>
Closes: 1071993 1147333
Changes:
 cppimport (26.04.17-1) unstable; urgency=medium
 .
   * Team upload.
   * New upstream version 26.04.17 (Closes: #1147333, #1071993)
   * Add debian/gbp.conf
   * Add debian/salsa-ci.yml
   * Drop "Rules-Requires-Root: no": it is the default now
   * Bump Standards-Version to 4.7.4, drop Priority: tag
   * Use dh-sequence-python3
   * Rewrite d/watch in v5 format
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Files:
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