Try to load rubygems. Hey rubygems, I hate you.
Required files
rubygems
singleton
facter
puppet/error
puppet/util
puppet/util/autoload
puppet/util/settings
puppet/util/feature
puppet/util/suidmanager
puppet/util/run_mode
puppet/util/logging
puppet/feature/base
puppet/defaults
puppet/type
puppet/parser
puppet/resource
puppet/network
puppet/ssl
puppet/module
puppet/util/storage
puppet/status
puppet/file_bucket/file
puppet/configurer/fact_handler
puppet/configurer/plugin_handler
puppet/agent/locker
puppet/ssl/certificate_factory
puppet/ssl/inventory
puppet/ssl/certificate_revocation_list
puppet/ssl/certificate_authority/interface
puppet/network/authstore
openssl/digest