@gbadner I try to built version 5.1.16-SNAPSHOT with attached PR on JDK 6 but I have failed with the following error:

Execution failed for task ':compileGroovy'.
> org/hibernate/build/gradle/animalsniffer/AnimalSnifferExtension : Unsupported major.minor version 52.0

Gradle animal sniffer plugin is built with JDK 8 and I am not able to find its sources. Can anyone advise me where they are stored or for what it is used?