Package: postgresql-client-common Version: 177 Your package recommends libreadline6 which is scheduled for removal, rebuilding it with a current libreadline-dev should fix that.
IIUC a binNMU is not possible because the package is Architecture: all, so you will have to make a sourceful upload. -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable'), (101, 'experimental') Architecture: i386 (x86_64) Kernel: Linux 4.8.10-nouveau (SMP w/2 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)