There is a new pull request by TheExpert1337 against master on the void-packages repository

https://github.com/TheExpert1337/void-packages blackbox_exporter
https://github.com/void-linux/void-packages/pull/15182

blackbox_exporter: update to 0.15.1
Contact me if anything wrong.

A patch file from https://github.com/void-linux/void-packages/pull/15182.patch is attached