OSX Build Bug!
Build 24 & 25 have an error in their builds and looks like will occur in subsequent ones too.
appserv-ext.jar does not come gzip'd as appserv-ext.jar.pack.gz and the ant -f setup.xml build process will fail.
I simply gzip'd the file and renamed correctly and it works.
To debug I edited setup.xml and changed lines 578-582 with :
I.e added the echo message line to output which jar was being processed.