pde build on windows for linux

I am using a headless pde build on a windows xp system using eclipse 3.3

My windows version works great.  My linux versioni does not work because the
org.eclipse.swt.gtk.linux.x86_3.3.0.v3346.jar is not included in the .zip that is created.

If I add this jar after the fact to my unzipped version on Linux, the application works.

How do I get the pde build to include this jar.

I am using the following in my build.properties:
configs=win32, win32, x86 & linux, gtk, x86