[MacRuby-devel] MacRuby rvm and gem installation

Hi all, I have been running into an issue with MacRuby 0.6. Using rvm I cannot install any gem (have tried a few rspec, bundler, etc). I systematically get the following error: ERROR: While executing gem ... (Errno::EACCES) Permission denied - open() failed Permission denied - open() failed (Errno::EACCES) Any idea what might be going wrong? thanks and regards J.