groovy roswtf pythonpath errors - python libraries not built? [closed]

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Hi, I've successfully installed ROS Groovy in Gentoo using the source, and I've completed the beginner tutorials successfully. When it came to the roswtf tutorial, I got all these errors about PYTHONPATH inconsistencies. The output is here: (http://)bpaste.net/show/93407/

It seems to suggest that the python libraries for many packages were not built.

Am I correct in this understanding?

What could I have done while building from source to ensure that the python libraries were built?

Also, about the ROS_PACKAGE_PATH errors - do I need to worry about them?

Looking forward to your help. Thanks.