Try to load rubygems. Hey rubygems, I hate you.
Required files
rubygems
singleton
facter
puppet/error
puppet/util
puppet/util/log
puppet/util/autoload
puppet/util/settings
puppet/util/feature
puppet/util/suidmanager
puppet/feature/base
puppet/defaults
puppet/type
puppet/network
puppet/ssl
puppet/module
puppet/util/storage
puppet/parser/interpreter
puppet/rails