Package: lightning Version: 1:60.0-3 Followup-For: Bug #908494 I have now recreated the issue on a clean install of Sid in a VM.
Steps were: - install from 9.5.0-netinst ISO with basic packages option - change sources.list to point to sid and dist-upgrade - install xorg wdm awesome thunderbird-l10n-en-gb lightning There is no longer any debconf error below (sending this from the VM) but no useful information unfortunately. I have looked in my config editor and there is no settings that match "extensions.installedDistroAddon". Thanks, George -- System Information: Debian Release: buster/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 4.18.0-1-amd64 (SMP w/1 CPU core) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages lightning depends on: ii thunderbird 1:60.0-3 lightning recommends no packages. Versions of packages lightning suggests: pn calendar-google-provider <none> pn fonts-lyx <none> -- no debconf information