Prior to the 4.0.0 incubating release, Ant was used to build CloudStack. A migration to Maven started in the 4.0.0 cycle, and has completed in 4.1.0.

The website and the wiki contain up to date information on the build procedure at:

Learning Maven is outside the scope of this documentation.

Go to the Maven website at http://maven.apache.org/guides/getting-started/index.html