There is an updated pull request by unspecd against master on the void-packages repository

https://github.com/unspecd/void-packages gcovr-depends-fix
https://github.com/void-linux/void-packages/pull/28042

gcovr: add missing runtime dependency
Fixes: `ModuleNotFoundError: No module named 'lxml'`.

A patch file from https://github.com/void-linux/void-packages/pull/28042.patch is attached