Package: libboost-iostreams1.60.0 Severity: normal Please change the Priority of libboost-iostreams1.60.0 to optional; see also [1]. (Also even if it had rdeps, a high priority is rather contraproductive IMHO, see [2].)
Ansgar [1] <https://bugs.debian.org/827287> [2] <https://bugs.debian.org/758234>