Dear Maintainer, setuptools-scm added dependency on python3-tomli and your package builds fine now in a sid chroot environment [1]
> setuptools-scm (7.1.0-2) unstable; urgency=medium > > * Add an explicit Depends on python3-tomli, required while Python 3.10 is a > supported version. (Closes: #1027947) > > -- Stefano Rivera <stefa...@debian.org> Sat, 14 Jan 2023 12:13:09 -0400 Kind Regards [1] https://tracker.debian.org/media/packages/s/setuptools-scm/changelog-7.1.0-2