ruby-celluloid-supervision 0.20.0-2 is marked for autoremoval from testing on 2016-02-10 It is affected by these RC bugs: 810770: ruby-celluloid-supervision: FTBFS: `to_specs': Could not find 'timers' (~> 4.0.0) - did find: [timers-4.1.1] (Gem::LoadError)