Need help building sbaz in the scala source.

When I run "ant dist" and "ant distpack", I don't get an sbaz binary
in the bin folder. I have also tried "ant build" with no luck.
I use http://www.scala-lang.org/downloads to get Sources (SVN
repository snapshot) scala-2.7.7.final-sources.tgz (md5) 28.9 MB
I've been trying to get an answer on irc and googling, but no one
seems to know about it. Thanks.