I am agree with Colin.
The idea of having a Build Environment is not just to make the life easier to our devs,
but also to have ISOs which we can compare.
If the Environment doesnt bundle *ALL* the tools, then we can have devs/testers with
different Tools combinations...it can lead to break walls with our head.
Also we should try to do the compilation as easier as possible, why not creating RosBE 2.0
with GUI frontend? :3