There are a few dependencies that need to be installed before cucumber-nagios will work correctly:

  1. Install RubyGems from source.  Trust me, you’ll thank me for this later
  2. install ruby, irb, rdoc and ruby-dev from Apt using your favourite package manager
  3. install libxslt-dev, libxslt-ruby and libopenssl-ruby from Apt
  4. install cucumber-nagios using GEM

And that’s about it…