You requested ProGuard, but you don't have the JAR available! See README Android Ant Build. Available targets: help: Displays this help. clean: Removes output files created by other targets. compile: Compiles project's .java files into .class files. debug: Builds the application and signs it with a debug key. release: Builds the application. The generated apk file must be signed before it is published. install: Installs/reinstalls the debug package onto a running emulator or device. If the application was previously installed, the signatures must match. uninstall: Uninstalls the application from a running emulator or device. proguard: use before build statements like "debug" and "release" to enable proguard dead code removal. NOTE: You must have tools/proguard.jar available. See the README. Updating resources with Git revision and build date... Updated "msg_version" to: ${ant.project.name} ${manifest.version.name} (${git.revision} ${build.date}) Building and installing tests... Running test cases...