How to debug the integ cluster

[bric3]

I am trying to run the cluster in debug mode with the command line. However the custom Elasticsearch --debug-jvm isn't recognized. Am I using it wrong ?

shield-custom-realm-example ± ❯ gradle integTestCluster\#start --debug-jvm
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Elasticsearch Build Hamster says Hello!
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  Gradle Version        : 3.5
  OS Info               : Mac OS X 10.12.5 (x86_64)
  JDK Version           : Oracle Corporation 1.8.0_121 [Java HotSpot(TM) 64-Bit Server VM 25.121-b13]
  JAVA_HOME             : /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home
The executable property on ForkOptions has been deprecated and is scheduled to be removed in Gradle 5.0. Please use javaHome instead.

FAILURE: Build failed with an exception.

* What went wrong:
Problem configuring task :integTestCluster#start from command line.
> Unknown command-line option '--debug-jvm'.

* Try:
Run gradle help --task :integTestCluster#start to get task usage details. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 0.908 secs

Actually I'm using a hack to set the debug property on the integ task itself.