gem dependency error when running install

[dazdaz]

$ sudo gem install airplayer
Password:
ERROR: While executing gem ... (Gem::DependencyError)
Unable to resolve dependencies: airplayer requires reel (= 0.4.0), reel-rack (= 0.1.0), celluloid (= 0.15.2)

My platform is : OS X 10.11.2, gem 2.0.14.
Thanks.

[alexey-sh]

+1

[guyschlider]

+1