in pkg/archive/deb.go [239:255]
func (d *DebPackager) systemdArgs() []string {
args := []string{}
for i := range d.a.Systemd {
sd := d.a.Systemd[i]
args = append(args, "--deb-systemd", sd.Source)
}
// this could change
args = append(args,
"--deb-systemd-enable",
"--deb-systemd-auto-start",
"--deb-systemd-restart-after-upgrade",
)
return args
}