From where are you launching the build? build/build.sh? An IDE?
In the meantime - don't fret! Download the binary distro to play with.
Ahhhhhhh, build/build.sh, ay? The Quick Start sayeth this:
Start the build file without a parameter
I assumed they meant run ant without parameter -- NOT to run build.sh. (As soon as I saw build.xml I was thinking ant -- I didn't even notice build.sh sitting there.)
Looks like this build isn't working either; it's failing on some of the JSP and servlet classes, which it can't find. May I will try that binary.