thinking outloud wrote:
And /the step 5/ <http://wiki.apache.org/db-derby/BuildingDerby#head-681537d04a4de5433e397238dd9bf22eaf8611cb> didn't really work for me (i am using NB6 + windows) because when i add /ant.library.dir=<path>/ (and after clicking OK ) the build fail (ant problems) and when i try to redo the step 5 the path I've already added looked strange (may be a Netbeans bug??) so i changed this property in build.xml file (change ${ant.library.dir} to your path in tow places).
I have experience this myself with Netbeans on windows. If I remember correctly, I solve my problem by replacing all occurences of \ (backslash) in the path with / (slash).
-- Øystein
