How to use OpenJDK 9 builds as alternative JRE

Hi,

I wanted to try how our project runs with OpenJDK 9 as runtime environment. I downloaded the ea build from https://jdk9.java.net/download/, 
installed it (OS X 10.10) and chose it as alternative JRE for my run configuration but then got this error:

"alternative jre path needs to point to a jre, not to a complete jdk installation"

The problem is that the OpenJDK builds don't contain a jre folder. I tried to trick Idea by creating a jre-subdirectory and symlinking bin and lib dirs into that but that does not work.

Anybody else got this to work somehow?

Thanks in advance,

Robert