Building jar files in STS for scala projects using Build.sbt

Hi,
In the recent workshops on Scala and Spark we were writing our Scala applications in STS using the sbt tool and Build.sbt file.
But later Maven was started being used instead of Sbt based scala Projects. Creating Jar with Maven is easy using Build Maven.

How do we build jar files using the Scala projects with the Build.sbt defined??

You can follow topics in this lesson which cover complete scala, sbt and eclipse integration.
http://www.itversity.com/lessons/apache-spark-with-scala/