TinyDNS/DJBDNS setup for Ubuntu/Debian

setup.sh

#!/bin/bash -e

apt install -y ucspi-tcp build-essential

wget http://cr.yp.to/djbdns/djbdns-1.05.tar.gz
tar xf djbdns-1.05.tar.gz
cd djbdns-1.05/
echo gcc -O2 -include /usr/include/errno.h > conf-cc
wget https://www.fefe.de/dns/djbdns-1.05-test28.diff.xz
xz -d djbdns-1.05-test28.diff.xz
patch -p1 < djbdns-1.05-test28.diff

make
make setup check

useradd --no-create-home --shell /bin/false Gtinydns
useradd --no-create-home --shell /bin/false Gdnslog

tinydns-conf Gtinydns Gdnslog ./tinydns 127.0.0.1

mv ./tinydns/root /etc/tinydns

tinydns.service

[Unit]
Description=A DNS server daemon
Documentation=man:tinydns(8)
Requires=network.target
After=network.target

[Service]
Restart=always
PIDFile=/var/run/tinydns.pid
Environment="IP=ADDR" "ROOT=/etc/tinydns" "UID=Gtinydns" "GID=Gtinydns"
ExecStart=/usr/local/bin/tinydns
WorkingDirectory=/etc/tinydns

[Install]
WantedBy=multi-user.target

Do you remember were you forked this from? I commented on the original which problems the service file has...