Looking into this FTBFS, it looks like this is an apt resolver bug. If I build w/ sbuild --build-dep-resolver=aptitude , libphonon-dev installs just fine and the package builds.
I'm not sure what the correct course of action is though, as I'd like to close this RC bug if we can. -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org