Package: sbuild Version: 0.68.0-1 Severity: normal There a bunch of packages where aspcud can't find a solution. This seems to be related to the new glibc in unstable. Possibly the old libc is installed in the chroot and aspcud doesn't consider upgrading it, though that's just a guess.
See https://buildd.debian.org/status/logs.php?pkg=gcc-6&ver=6-20160313-1 Cheers, Emilio