New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/issues/20878#issuecomment-612512019

Comment:
Despite its name `build_wrksrc` is a modifier for all steps, not just build. See `common/xbps-src/shutils/common.sh` and there `ch_wrksrc()` which is called from every `run_step()`.