dh-systemd was merged into debhelper in version 9.
20160709 [1] and since
stretch, dh-systemd is an empty transitional package.
For bullseye there's an intend to drop this empty transitional package.
This commit drops the "| dh-systemd" alternative Build-Depends as it is no
longer required (not even for backports) and is only confusing.
For Debian Jessie, it's easier to add backported debhelper >= 10 to the
repository.
Ondřej Surý <ondrej@debian.org>
Build-Depends: bison,
chrpath,
- debhelper (>= 9.20150101),
+ debhelper (>= 10~),
flex,
gawk,
install-info,