MacBook-Pro:rubygems-1.0.1 kamal$ ../rubinius/shotgun/rubinius -Ilib bin/gem install rake --no-ri --no-rdoc -i ../rubinius/tmp/rbxgems
Bulk updating Gem source index for: http://gems.rubyforge.org
ERROR:  Error installing rake:
        invalid gem format for /Users/kamal/src/rubinius/tmp/rbxgems/cache/rake-0.8.1.gem