This should be resolved with the current upstream release.
- Bug#1037883: vimix: ftbfs with GCC-13 Matthias Klose
- Bug#1037883: vimix: ftbfs with GCC-13 Bastian Germann
- Bug#1037883: marked as done (vimix: ftbfs ... Debian Bug Tracking System
This should be resolved with the current upstream release.