This build file downloads JAR files that optional Ant tasks use, and installs them in a location that is accessible the next time Ant runs. You can choose three locations, by going -Ddest=LOCATION on the command line -Ddest=user user lib dir ${user.home}/.ant/lib -Ddest=system ant lib dir ${ant.home}/lib --Default-- -Ddest=optional optional dir ${ant.home}/lib/optional (for Ant developers) You may also need to set proxy settings. This can be done by setting the JVM proxy values in the ANT_OPTS environment variables. Unknown destination : ${dest} Downloading to ${dest.dir} The Maven2 JAR has been installed; rerun ant to load it. Unknown archive @{archive}