So pihole is just some nice tooling around dnsmasq to feed it a bunch of domains to block, but if you don't care about that you can just have have a script download a hosts file and load it into plain dnsmasq (or whatever DNS server you like; with dnsmasq use `addn-hosts=/etc/hosts.d`). Bonus: lots of routers already use dnsmasq, so you literally stick that line in the config file and populate the hosts file(s) and bam, free adblock.