The package version of the augeas library does not map to the ruby version

Given the example below, the package versions for libaugeas-ruby, libaugeas-ruby1.8, and libaugeas-ruby1.9 is 0.5.2 and has no relationship to a specified Ruby version (this is handled by the package name prefix)

http://packages.ubuntu.com/search?keywords=libaugeas-ruby&searchon=names&suite=trusty&section=all.

It would be better to use the `present`, `installed` or `latest` ensure directive.