buildnumber-maven-plugin and maven-assembly-plugin

Question

I've set up the buildnumber-maven-plugin to pull the version number from SVN and stash it away in the META-INF/MANIFEST.MF inside the jar. That works ok.

But when I try to use it together with the maven-assembly-plugin to pack all the other libs together It doesn't seem to work, the version number stuff is not included in the manifest in the ...-jar-with-dependencies.jar.

Has anybody managed to get them to work together?

Alternatively: Is there a (reasonable simple) way to output the ${buildNumber} into a text file (.properties, perhaps) using Maven? An Ant task in Maven could do it I guess but is there an easier way?