New version of perl will no longer include "." from
@INC by default. This causes out perl code that uses "require 'lib/sbin/XXX.pl'" to fail.
Since this will affect the release version a patch needs to be backported.
See https://lists.debian.org/debian-devel-announce/2016/08/msg00013.html Note that this is not Debian specific but affects all Perl packages.
I will prepare a patch.