Hi!

While rebuilding the python related packages against the Python 3.15rc1
version we found that python-mitogen fails to build from source [1].

I found that the fix had already been done upstream with Commit 983c7fa
[2].

I applied the upstream fix in the sandbox [3] to be able to build the
packages that depend on python-mitogen, please consider applying the
patch to support the upcoming 3.15 version.

Happy hacking,

[1]: https://debusine.debian.net/debian/r-python-python3.15/artifact/4354507/raw/python-mitogen_0.3.50-1+py315.1_amd64-2026-08-18T05:48:15Z.build
[2]: https://github.com/mitogen-hq/mitogen/commit/983c7fa62aa32fa4a766b249534f59f08a3ef32f
[3]: https://debusine.debian.net/debian/r-python-python3.15/