In production, your bot is run in a restricted environment. This allows us to support bugs and error reports more easily, and makes checking the code before publication much easier.
This means that when developing, you must use the version of Ruby that we support (ruby-1.9.3-p545) and the gems that we provide (see the runtime dependencies of the turbot-ruby-gems gem for the list).
Get in touch if you would like us to provide other gems.