I\'ve got a really strange problem here.
I forked a gem on github to do some modifications, cloned my repo on my local machine, made the changes and changed the Gemf
You can run with the bundler environment via:
bundle exec ruby script.rb
Or require bundler setup in your script before the gem(s) that are causing the issue.
require 'bundler/setup'
Most links I found out there about this pointed to documentation on Bundler's site, but most all of the links are dead now unfortunately.