Any reason this doesn't use the external: rb-libtorrent ? Which I'm
guessing might be the lib in use? Especially since that one has all the
sub depends for boost as well. Spells should generally use system libs
wherever this is possible(though if it's to much effort to do it(example
brlcad) then I think it would be safe to assume or in some cases where
the included one has some specific additions).