This script builds a patched version of jdtcore.jar with modifications needed for the AspectJ 1.1 compiler. It also builds a nicely packaged collection of the eclipse core packages that jdtcore depends on. The command {ant} -f build.xml -DeclipseDir=c:/apps/eclipse2.0 will produce ../lib/jdtcore-aj11.jar and ../lib/jdtDepends.jar jdtcore-aj11.jar is used for building the AspectJ 1.1 source distribution. It is *not* a replacement for jdtcore.jar in eclipse 2.0. Copy base sources from ${jdtcoresrc.zip}