Where can you set/change the ANT_OPTS in Hudson

Questions:
I'm using Hudson and Maven and also Ant to make a build.

I need to set the ANT_OPTS to pass additional JVM arguments. But where can I
set/change the ANT_OPTS in Hudson for a project?

When I configure a project I press button 'ADVANCED' in the build section.
In there I can set the MAVEN_OPTS, but actually I'm searching for the
ANT_OPTS.

Because at the moment the JunitReport code which is being called by ant
within Maven I'm running out of permgen memory.

At the moment this is what I pass to MAVEN_OPTS:
-Xmx1024m -Xms1024m -XX:MaxPermSize=512m -XX:+CMSPermGenSweepingEnabled
-XX:+CMSClassUnloadingEnabled

but I really need to set the ANT_OPTS somewhere.

Answer
Try the "java options" field in the advanced section.