Package: ddnet Hello!
I noticed the source package has references to libmariadbclient-dev: https://salsa.debian.org/search?search=libmariadbclient-dev&project_id=12775&group_id=2006 This is a deprecated package and you should instead use libmariadb-dev[1] or libmariadb-dev-compat if you need to build something old that does not find the correct soname otherwise. Those lines are probably more relevant upstream, but I was not able to easily find where the upstream sources are so filing this now in Debian. Thanks! 1: https://packages.debian.org/search?keywords=libmariadb-dev