To work with Maven you need to set the following environment variables:
  * JAVA_HOME
    Set it to the base directory of your java installation.
  * MAVEN_HOME
    Set it to ``%%PREFIX%%/%%DIR%%''.

Then, you should initialize your repository with:
  %%PREFIX%%/%%DIR%%/bin/install_repo.sh ~/.maven/repository

If you are behind a proxy, create a ~/.mavenrc file with something like:
  MAVEN_OPTS="$MAVEN_OPTS -Dmaven.proxy.host=YOUR_PROXY_HOSTNAME
    -Dmaven.proxy.port=YOUR_PROXY_PORT"