Kalumet use Maven for the build.
You need a JDK (1.5 minimum) and Maven (3.x minimum) in order to build Kalumet.
Once you have checkout the source (or downloaded the source distribution), just type:
mvn clean install
to build Kalumet. You will find the archives (for both agents and console, as zip and tar.gz archives) in assembly/target directory.
In order to speed up the build, you can skip the tests:
mvn clean install -DskipTests