Package: libroar-dev Version: 1.0~beta11-9 Severity: important
libroar-dev "provides" libsndio-dev. This made sense in jessie since libroar-dev contained /usr/include/sndio.h and /usr/lib/arm-linux-gnueabihf/libsndio.so but the stretch version of the package no longer contains those files. So IMO this provides is bogus. I ran into this while trying to build vlc. If libroar-dev is installed but libsndio-dev is not then the build-depends are satisfied thanks to the provides but vlc fails to build because it can't find sndio.
