voyd [1] filed a deletion request for ruby-cerberus [2]: This package is no longer maintained, as stated by the author at [1]. The last release has been in 2011[2]. [1] https://github.com/cpjolicoeur/cerberus/issues/18#issuecomment-65904753 [2] https://rubygems.org/gems/cerberus [1] https://aur.archlinux.org//account/voyd/ [2] https://aur.archlinux.org//pkgbase/ruby-cerberus/