Comment 4 for bug 1579922

I can reproduce it with the package excerpts at

https://code.launchpad.net/~serge-hallyn/+git/pkg1
and
https://code.launchpad.net/~serge-hallyn/+git/pkg2

First

 dpkg -i pkg1_1-1_amd64.deb

then

 dpkg -i pkg1_1-2_amd64.deb pkg2_1-2_amd64.deb

On yakkety, this gives me:

(Reading database ... 27385 files and directories currently installed.)
Preparing to unpack /pkg1_1-2_amd64.deb ...
enabled
Unpacking pkg1 (1-2) over (1-1) ...
Selecting previously unselected package pkg2.
Preparing to unpack /pkg2_1-2_amd64.deb ...
Unpacking pkg2 (1-2) ...
Setting up pkg2 (1-2) ...
Failed to execute operation: No such file or directory
/usr/bin/deb-systemd-helper: error: systemctl preset failed on pkg2.service: No such file or directory
Failed to get unit file state for pkg2.service: No such file or directory
pkg2.service is a disabled or a static unit, not starting it.

I trust I'm doing something wrong in pkg1.preinst (in version 1-2).