maven.multiModuleProjectDirectory

[Justin Lee]

I'm using maven 4.0.0-rc-5 and I'm trying to reference the very root of my
multimodule project.  I though maven.multiModuleProjectDirectory was that
answer but it always resolves to the current module's path.  in
<pluginMgmt> in the root, I'm trying to reference config files in a folder
off the root of the overall project without have to hand code relative
paths in every module.  How is one supposed to achieve this?  Is it even
possible?  Thanks.