tk requirement?

[Joshua Bronson]

Hey Erlang folks,

I know relatively little about the Erlang distribution (my exposure is
pretty much limited to installing it as a requirement of couchdb and
rabbitmq-server). I was wondering if tk is (or has to be?) a hard
requirement of the distribution or if (like e.g. Python) it's possible
to build Erlang with a no_tk variant / USE flag / etc. in the case
that you know you won't be needing to do any gui stuff. (This query is
prompted by http://trac.macports.org/ticket/20006.)

Thanks!

Josh