Configure looks for GOB2.
The README says:
"Matchers and Actions are GObjects, subclasses of DevilsPieMatcher and
DevilsPieAction. They must export any properties they support via
GObject properties. I recommend using GOB to write these, as it makes
it much easier! When GOB supports it, the Matcher and Action classes
will become pure interfaces, but for now they are abstract classes."
Could you add a dependence towards the port devel/gob2?
GOB is not required. The source code generated from .gob files is
included in the tarball.
New port added, thanks!
(Sorry for the noise about GOB)