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

https://github.com/Chocimier/void-packages-org build_sub_deps
https://github.com/void-linux/void-packages/pull/20990

xbps-src: build depends of subpackages
resolves #20508

A patch file from https://github.com/void-linux/void-packages/pull/20990.patch is attached