This repo is for the now sunset mcMMO Classic, which is no longer in development. If you are looking for updates for mcMMO, see the main repo which is in active development: https://github.com/mcMMO-Dev/mcMMO
Since this is a sunset project, the maven pom.xml file may need modification in order to build, your milegage may vary.
mcMMO Classic uses Maven 3 to manage dependencies, packaging, and shading of necessary classes; Maven 3 is required to compile mcMMO.
The typical command used to build with maven is: mvn clean install