Cannot resolve tag library

I use ant and XDoclet for my builds. XDoclet is used to generate the web.xml to a build directory, in a separate tree from my source files. I would like to use this web.xml as the source for my web application. But all of the TLD references show as errors because the web.xml is in a different tree.

Is there a solution to this by adding the build directory to the project tree somehow?

Thanks!

-b