There is an updated pull request by Cogitri against master on the void-packages repository

https://github.com/Cogitri/void-packages tau
https://github.com/void-linux/void-packages/pull/15572

tau: update to 0.9.3
Also enable on x86_64-musl again, where rustc should hopefully work w/ gtk-rs

A patch file from https://github.com/void-linux/void-packages/pull/15572.patch is attached