How can I get Ant to use jikes for javac tags instead of sun's javac?

[Jeff Trent]

I'd like:     <javac srcdir="src" destdir="${deploy.home}/WEB-INF/classes"            classpath="${deploy.home}/WEB-INF/classes"            debug="on" optimize="off" deprecation="off"/> to use jikes instead.  Has anyone done this?