The exact same thing happens with a non-Debian version of rbenv and ruby-build on a pristine Wheezy box. This does not seem to be a packaging error but a problem with ruby-build (or maybe rubinius).
Could you please file an upstream bugreport? Thanks. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org