2.1.1 :001 > require 'zypper'
NoMethodError: undefined method `parser=' for Nori:Class
from /home/vpereira/.rvm/gems/ruby-2.1.1/gems/zypper-0.3.0/lib/zypper/utils.rb:31:in `<module:ZypperUtils>'
from /home/vpereira/.rvm/gems/ruby-2.1.1/gems/zypper-0.3.0/lib/zypper/utils.rb:1:in `<top (required)>'
from /home/vpereira/.rvm/rubies/ruby-2.1.1/lib64/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:73:in `require'
from /home/vpereira/.rvm/rubies/ruby-2.1.1/lib64/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:73:in `require'
from /home/vpereira/.rvm/gems/ruby-2.1.1/gems/zypper-0.3.0/lib/zypper.rb:1:in `<top (required)>'
from /home/vpereira/.rvm/rubies/ruby-2.1.1/lib64/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:135:in `require'
from /home/vpereira/.rvm/rubies/ruby-2.1.1/lib64/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:135:in `rescue in require'
from /home/vpereira/.rvm/rubies/ruby-2.1.1/lib64/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:144:in `require'
from (irb):1
from /home/vpereira/.rvm/rubies/ruby-2.1.1/bin/irb:11:in `<main>'
2.1.1 :003 >
https://github.com/openSUSE/rubygem-zypper/blob/master/lib/zypper/utils.rb#L31