This is an assembly module for Spark project. It creates a single tar.gz file that includes all needed dependency of the project except for org.apache.hadoop.* jars that are supposed to be available from the deployed Hadoop cluster. This module is off by default to avoid spending extra time on top of repl-bin module. To activate it specify the profile in the command line -Passembly In case you want to avoid building time-expensive repl-bin module, that shaders all the dependency into a big flat jar supplement maven command with -DnoExpensive