This build file downloads the Maven2 Ant tasks, and installs them in the location specified by the m2.dest.dir property. You may need to set proxy settings. On Java1.5, Ant tries to get this from the OS, unless you use the -noproxy option. Proxies can be configured manually setting the JVM proxy values in the ANT_OPTS environment variable. For example, to set the proxy up in the tcsh shell, the command would be something like: For csh/tcsh: setenv ANT_OPTS "-Dhttp.proxyHost=proxy -Dhttp.proxyPort=8080" For bash: export ANT_OPTS="-Dhttp.proxyHost=proxy -Dhttp.proxyPort=8080" For Windows, set the environment variable in the appropriate dialog box and open a new console. or, by hand set ANT_OPTS = -Dhttp.proxyHost=proxy -Dhttp.proxyPort=8080 $${@{property}} not specified Downloading to ${m2.dest.dir} Failed to verify the downloaded file ${m2.antlib.url}" against the checksum coded into libraries.properties. The local copy has been deleted, for security reasons