Debian (and Ubuntu) actually ships all of 1.9.x as 1.9.1, fwiw. On my Wheezy VPS, "ruby1.9.1" is actually 1.9.3p194, on Ubuntu 12.04.2 it's 1.9.3p0, on Squeeze it's 1.9.2p0. It's some kind of API compatibility thing that probably makes sense to the Debian Ruby packagers, but not necessarily to you or me.