Yeah. That specific. The DKMS failed and the culprit was the GCC version. Liquorix build their kernel using vesion 9, whilst the system had the version 10.

It's easy to “solve”. Do as follows: export IGNORECCMISMATCH=1. Then run apt as usually.

Source: https://askubuntu.com/questions/1143303/dkms-failure-because-gcc-version-is-newer-than-that-used-to-compile-kernel