Hi, Jumping here for a feedback, > Yeah, Sup should run on ruby 2.1. I use Sup on Archlinux since February (Arch has updated the system ruby to 2.1 in January of this year) without any issue. So yes, Sup work flawlessly on ruby 2.1 :) -- Mayeu a.k.a Matthieu http://6x9.fr GPG: A016 F2D8 0472 1186 1B33 A419 22B1 0496 B00D A693