To build the JAR file of Message Pack, you need to install Maven (http://maven.apache.org), then type the following command: $ mvn package To locally install the project, type $ mvn install To generate project files (.project, .classpath) for Eclipse, do $ mvn eclipse:eclipse then import the folder from your Eclipse. Next, open the preference page in Eclipse and add the CLASSPATH variable: M2_REPO = $HOME/.m2/repository where $HOME is your home directory. In Windows XP, $HOME is: C:/Documents and Settings/(user name)/.m2/repository # How to release the project (compile, test, tagging, deploy) $ mvn release:prepare $ mvn release:perform