The correct path should be /usr/lib/ruby/1.8

To duplicate

1. apk add ruby rubygems
2. gem
   localhost:~# gem
   /usr/bin/gem:8:in `require’: no such file to load — rubygems (LoadError)
   from /usr/bin/gem:8
3. mv /usr/lib/rubygems* /usr/lib/ruby/1.8
4. gem
   (works as expected)

(from redmine: issue id 157, created on 2009-09-06, closed on 2009-10-02)

• Changesets:
  • Revision 7c2b7d6a on 2009-09-07T13:30:19Z:

main/rubygems: install rubygems.rb in correct location

fixes #157