Comment # 3 on bug 949357 from Dominique Leuenberger

(In reply to Mark Gonnelly from comment #2)

> xsltproc is invoked in the last line of /usr/bin/openbox-pipemenu. It is
> essential for the menu to be built correctly.

DOH! Thanks.. I grep'ed the entire tarball for it.. but did not consider that
we add an own menu generator on top of it (that is not upstream code)...

so, yes: the requires makes sense here.