wipe-out other system log daemons
apt purge rsyslog inetutils-syslogd apt autoremove --purge
those are enough to build sysklogd from scratch
apt install build-essential
grab the latest tag
var=2.7.2
wget https://github.com/troglobit/sysklogd/releases/download/v$ver/sysklogd-$ver.tar.gz
tar xzf sysklogd-$ver.tar.gz
cd sysklogd-$ver/
./configure --sysconfdir=/etc/ --localstatedir=/var \
--with-dns-delay=1 \
--with-systemd=/etc/systemd/system --with-suspend-time=5
echo $MAKEFLAGS
make
make install
cp -i syslog.conf /etc/
ls -ltr /etc/systemd/system/syslogd.service
see sysklogd