I have given up on this one. As Files are being moved, deleted, written all over the place during installation I constantly run into permission problems.
This seems to be an issue related to Os X (default umask) <-(NFS)-> Ubuntu VM (umask).
As Newscoop needs a lot of resources, running it in a small VM wasn't too much fun anyway.
So I have moved my Newscoop Development environment back to Os X with ZendServer CE.