case-sensitivity issue with plugins in gradle build

Morning...

Strange problem here. I have the follow plugin requirements in the intellij {} block in my build.gradle:

plugins = ["Groovy", "maven"]

This produces the following error:

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all dependencies for configuration ':runtime'.
> Could not resolve org.jetbrains.plugins:maven:2016.3.
 Required by:
 project :
 > Could not resolve org.jetbrains.plugins:maven:2016.3.
 > inconsistent module metadata found. Descriptor: com.jetbrains:idea:2016.3 Errors: bad group: expected='org.jetbrains.plugins' found='com.jetbrains'
 bad module name: expected='maven' found='idea'
 > Could not resolve org.jetbrains.plugins:maven:2016.3.
 > inconsistent module metadata found. Descriptor: org.jetbrains.plugins:Groovy:2016.3 Errors: bad module name: expected='maven' found='Groovy'
 > Could not resolve org.jetbrains.plugins:maven:2016.3.
 > inconsistent module metadata found. Descriptor: org.jetbrains.plugins:Maven:2016.3 Errors: bad module name: expected='maven' found='Maven'

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

BUILD FAILED

Total time: 4.616 secs
inconsistent module metadata found. Descriptor: com.jetbrains:idea:2016.3 Errors: bad group: expected='org.jetbrains.plugins' found='com.jetbrains'
bad module name: expected='maven' found='idea'

I can fix on that on windows and mac by changing the casing to Maven. The problem is then that that fails on our CI servers which run CentOS. What works on CentOS is all lower-case maven.

Has anyone seen this before? 

cheers, jamie