Just an issue found along the way during bug #17723. If you don't have gentoolkit installed, and run the rebuilder.sh script, you get: ./rebuilder.sh: line 20: qpkg: command not found possible fixes: 1. add gentoolkit to DEPEND 2. put some code in rebuilder.sh so that it spits out a msg that you require gentoolkit and tells you to emerge it. This needs to go into the stable tree ASAP. bug #18605 should go in at the same time to avoid further problems.
Fixed in portage - thanks!