Rhomobile: rake run:iphone, uuidgen error

When I run command rake run:iphone I get this error:

cd C:/InstantRhodes/ruby/lib/ruby/gems/1.8/gems/rhodes-3.0.1
rake aborted!
No such file or directory - uuidgen

How can fix this?

Thanks开发者_运维问答.

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You can only build to iPhone with a Mac and XCode.

EDIT:

Straight from the developers: http://groups.google.com/group/rhomobile/browse_thread/thread/977221a90b2dc8a9/057abafb9873b866?lnk=gst&q=uuidgen#057abafb9873b866