New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/25436#issuecomment-708617678

Comment:
You might need to package `GN` in void, I think (ew). See [here](https://github.com/denoland/rusty_v8/blob/57390ec4ee79486361d34fdd63cecf97a4006628/build.rs#L282), I think the env var is just `GN`.