Dear Maintainer After applying this commit [1], I was able to build successfully your package in a sid chroot environment. I've also tried to build against sphinx 7.2.6-1 + python-docutils 0.20.1+dfsg-1 in experimental and no problems were spotted.
Kind Regards [1] https://github.com/django-crispy-forms/django-crispy-forms/pull/1257