Followup-For: Bug #850760
and this happens on upgrades from stretch to sid:
Setting up nixstatsagent (1.1.2-1) ...
...
Preparing to unpack .../4-nixstatsagent_1.1.2-1_amd64.deb ...
Unpacking nixstatsagent (1.1.2-1) over (1.1.0-1) ...
Setting up libexpat1:amd64 (2.2.0-2) ...
Setting up python-pkg-resources (32.3.1-1) ...
Processing triggers for libc-bin (2.24-8) ...
Setting up python-psutil (5.0.1-1) ...
Setting up libsqlite3-0:amd64 (3.16.2-1) ...
Configuration file '/etc/nixstats.ini'
==> File on system created by you or by a script.
==> File also in package provided by package maintainer.
What would you like to do about it ? Your options are:
Y or I : install the package maintainer's version
N or O : keep your currently-installed version
D : show the differences between the versions
Z : start a shell to examine the situation
The default action is to keep your current version.
*** nixstats.ini (Y/I/N/O/D/Z) [default=N] ? dpkg: error processing package
nixstatsagent (--configure):
end of file on stdin at conffile prompt
...
Andreas