When using Boxen, it seems that everything has switched over to nodenv. By looking at the source, it's clearly using this version of nodeenv, but searching in google bring up https://github.com/OiNutter/nodenv instead, which seems more complete (despite the readme being a nearly exact copy of rbenv).
Would it be worth starting a conversation about merging the projects or deprecating one of them? It doesn't seem like either one has really taken off yet.