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). https://github.com/denoland/rusty_v8/blob/master/build.rs#L282 I think the env var is just `GN`.