Hello! The sources for Debian packaging in Debian and Ubuntu are in the debian/ directory at https://github.com/MariaDB/server/tree/10.5/debian The sources for Debian packaging in MariaDB.org repositories are in the debian/ directory https://github.com/MariaDB/server/tree/10.5/debian Currently the differences in 10.5 for these two are fairly small. The older version you are looking at, the bigger are the differences. Your message does not mention what version you were looking at. There is no single place where the differences would be documented, but you can see in the sources the specific details you are interested in. As a general rule of thumb, use as recent versions of MariaDB as possible and you will have less issues of both packaging and other bugs. - Otto