There is a new pull request by st3r4g against master on the void-packages repository

https://github.com/st3r4g/void-packages nvidia340-340.108
https://github.com/void-linux/void-packages/pull/17999

nvidia340: update to 340.108
Tested (builds and runs) with `linux5.3` and `linux5.4`

Closes https://github.com/void-linux/void-packages/issues/16923

A patch file from https://github.com/void-linux/void-packages/pull/17999.patch is attached