New comment by dkwo on void-packages repository

https://github.com/void-linux/void-packages/pull/35636#issuecomment-1041362519

Comment:
> If it is meant for people to provide their own installer, it is at edge of being acceptable. But then it should error out with helpful message when file is not there.

Thanks, I added a build option and message.
Indeed, it is as you say, and I understand it is borderline acceptable.
I mainly wanted to check I'm not doing anything stupid, and though it may be useful to other users.