Alpine Linux

geoip ships both a library and a database. The library is not updated very often while the database is updated once every month.

from the README file:

GeoIP is a C library that enables the user to find geographical and network information of an IP address. Included is a free GeoLite Country database that is updated at the beginning of every month. To download the latest free GeoLite Country database, go to:
http://www.maxmind.com/app/geoip_country

The exact URL is:
http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz

1. separate the data from the package an update the database package once every month.
2. Download it via monthly cron job, similar to what we do with the root servers for dnscache and unbound.

I think option 2 is the easiest.