Hi!

While rebuilding the python related packages against the Python 3.15rc2
version we found that datalad fails to build from source [1].

The error was:
Download error on https://pypi.org/simple/keyrings.alt/: [Errno -3] Temporary failure in name resolution -- Some packages may not be found!

To fix this and other issues, I had to make a number of changes to the
package:
- Make sure it doesn't use the network while building
- Add upstream patch 8f078923de85308307efbd5ea1f1cfa199d8d190: fix:
   Avoid use of return in a finally block
- Add patch to use fork with multiprocessing, avoid using the forkserver
- Avoid using the setuptools deprecated develop call
- Ignore commonprefix deprecation warning
- Update PYBUILD_BEFORE_TEST to ensure bin/ shims are regenerated

I've applied these fixes in the sandbox [2] to verify that it builds
successfully, please consider applying the patch to support the upcoming
3.15 version.

Setting the severity to important for now. Once Python 3.15 is released,
it will be added to python3-defaults and this bug will become release
critical.

Happy hacking,

[1]: https://debusine.debian.net/debian/r-python-python3.15/artifact/4514128/
[2]: https://debusine.debian.net/debian/r-python-python3.15/

We believe that the bug you reported is fixed in the latest version of
datalad, 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 1148031@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Yaroslav Halchenko <debian@onerussian.com> (supplier of updated datalad 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: Thu, 01 Oct 2026 08:36:59 -0400
Source: datalad
Architecture: source
Version: 1.6.5-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <team+python@tracker.debian.org>
Changed-By: Yaroslav Halchenko <debian@onerussian.com>
Closes: 1148031
Changes:
 datalad (1.6.5-1) unstable; urgency=medium
 .
   [ Maximiliano Curia ]
   * Fix Python 3.15 test failures:
     set multiprocessing start method to fork (Closes: #1148031)
 .
   [ Yaroslav Halchenko ]
   * Fresh upstream update with fixes for 3.15 and fakeroot compatibility
     (hence dropped up-getuid patch)
   * d/patches - refreshed
   * d/control - add python3-psutil to B-D and Recommends
     (needed for tracking open files functionality/tests)
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 782b1239032f63ea58bfb8ce3090337656aa0e5d 1550407 datalad_1.6.5.orig.tar.gz
 e179b437f630ab8d2f8f725f94f0f9fe5355603f 19324 datalad_1.6.5-1.debian.tar.xz
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Files:
 bc7dc5c850d2b89ad6107cbc398bfd22 2705 science optional datalad_1.6.5-1.dsc
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 d11789cd011887fd1b371ed735e0a62b 19324 science optional datalad_1.6.5-1.debian.tar.xz
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