you can try it out by editing the

rust-toolchain

file at the buildroot to say

nightly

, but the v2 engine uses stable rust versions for now so it would be difficult to merge. some nightly-only APIs will stay that way for a while/forever so unless we wanted to take the nightly plunge (which would be difficult to justify) we probably can't use those for now. rust is a very extensible language though so if there is a feature that seems useful we can probably figure out how to make it happen