can't gradle

I git clone the latest kafka package, why can't I build the package

gradle

FAILURE: Build failed with an exception.

* Where:
Script '/home/ubuntu/kafka/gradle/license.gradle' line: 2

* What went wrong:
A problem occurred evaluating script.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info
or --debug option to get more log output.

BUILD FAILED

Thanks

Alec Li