Sake Headaches on Rails 2.0 Preview release

1. sudo gem install ruby2ruby -y
2. sudo gem install sake
3. sake -i bootstrap.rake

throws the error:

/usr/local/lib/ruby/gems/1.8/gems/sake-1.0.11/lib/sake.rb:315:in `parse': /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:2028:in `const_missing': uninitialized constant Sake::TasksFile::RAILS_ROOT (NameError)