/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- gsl (LoadError)
from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
from /opt/ohm2/lib/components.rb:2:in `<top (required)>'
from /opt/ohm2/ohm.rb:1:in `require_relative'
from /opt/ohm2/ohm.rb:1:in `<top (required)>'
from /opt/ohm2/ohm:5:in `require_relative'
from /opt/ohm2/ohm:5:in `<main>'