Assuming your local repository is mounted on /Volumes/se.labri.fr/maven

mvn dependency:copy-dependencies -Dmdep.copyPom=true -Dmdep.useRepositoryLayout=true -DoutputDirectory=/Volumes/se.labri.fr/maven`
Ask maven for help on a plugin
mvn help:describe -Dplugin=dependency -Dgoal=copy-dependencies -Ddetail