How is the bin package of confluent kafka built?

I see that the tarball present in http://packages.confluent.io/archive/5.1/confluent-5.1.0-2.11.tar.gz

contains dependency jars arranged in different folder structure ,with dependent jar files distributed according to categories in share/java/ folder

However , when i clone the git of confluent kafka v_5.1 and build the project , all the dependent jar files are present in lib/ folder instead .

Is this because of a different gradle definition ? where can i obtain the gradle file for publishing http://packages.confluent.io/archive/5.1/confluent-5.1.0-2.11.tar.gz ?