There is a new pull request by sgn against master on the void-packages repository

https://github.com/sgn/void-packages xbps-src-bootstrap-foreign
https://github.com/void-linux/void-packages/pull/24343

xbps-src: bootstrap from foreign distro fix
Trying to binary-bootstrap from Ubuntu 20.04 today.
This is a preliminary fix.

A patch file from https://github.com/void-linux/void-packages/pull/24343.patch is attached