Issue installing Vagrant Berkshelf with 1.5 Vagrant

bash.sh

jbellone@dc110-05-298dx:~/Projects/vagrant-berkshelf % vagrant plugin install vagrant-berkshelf-1.4.0.dev1.gem                                         11:58:26
Installing the 'vagrant-berkshelf-1.4.0.dev1.gem' plugin. This can take a few minutes...
/Applications/Vagrant/embedded/gems/gems/bundler-1.5.3/lib/bundler/parallel_workers/unix_worker.rb:19:in `initialize': uninitialized constant Net::HTTP::Persistent (NameError)
	from /Applications/Vagrant/embedded/gems/gems/bundler-1.5.3/lib/bundler/parallel_workers.rb:14:in `new'
	from /Applications/Vagrant/embedded/gems/gems/bundler-1.5.3/lib/bundler/parallel_workers.rb:14:in `worker_pool'
	from /Applications/Vagrant/embedded/gems/gems/bundler-1.5.3/lib/bundler/installer.rb:281:in `install_in_parallel'
	from /Applications/Vagrant/embedded/gems/gems/bundler-1.5.3/lib/bundler/installer.rb:95:in `run'
	from /Applications/Vagrant/embedded/gems/gems/bundler-1.5.3/lib/bundler/installer.rb:15:in `install'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/bundler.rb:208:in `block in internal_install'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/bundler.rb:254:in `block in with_isolated_gem'
	from /Applications/Vagrant/embedded/lib/ruby/2.0.0/rubygems/user_interaction.rb:40:in `use_ui'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/bundler.rb:253:in `with_isolated_gem'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/bundler.rb:207:in `internal_install'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/bundler.rb:78:in `install'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/plugin/manager.rb:62:in `block in install_plugin'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/plugin/manager.rb:72:in `call'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/plugin/manager.rb:72:in `install_plugin'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/plugins/commands/plugin/action/install_gem.rb:28:in `call'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/action/warden.rb:34:in `call'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/action/builder.rb:116:in `call'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/action/runner.rb:69:in `block in run'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/util/busy.rb:19:in `busy'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/action/runner.rb:69:in `run'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/plugins/commands/plugin/command/base.rb:14:in `action'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/plugins/commands/plugin/command/install.rb:32:in `block in execute'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/plugins/commands/plugin/command/install.rb:31:in `each'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/plugins/commands/plugin/command/install.rb:31:in `execute'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/plugins/commands/plugin/command/root.rb:56:in `execute'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/cli.rb:42:in `execute'
	from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/environment.rb:244:in `cli'
	from /Applications/Vagrant/bin/../embedded/gems/gems/vagrant-1.5.0/bin/vagrant:147:in `<main>'

Did you figure out how to solve this?