Philip orleans added a comment - 2020-12-03 06:58 - edited aptitude -y install libmariadbclient-dev The following NEW packages will be installed: libmariadbclient-dev{b} 0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 1585 kB of archives. After unpacking 9683 kB will be used. The following packages have unmet dependencies: libmariadbclient-dev : Depends: libmariadbclient18 (= 1:10.1.47-0ubuntu0.18.04.1) but 1:10.5.8+maria~bionic is installed Conflicts: libmysqlclient-dev but it is not going to be installed libmariadb-dev : Breaks: libmariadbclient-dev but 1:10.1.47-0ubuntu0.18.04.1 is to be installed The following actions will resolve these dependencies:   Keep the following packages at their current version: 1) libmariadbclient-dev [Not Installed]

Sergei Golubchik added a comment - 2021-01-07 16:09 libmariadbclient-dev package doesn't exist since 10.2, we have libmariadb-dev that provides libmariadbclient-dev . I would expect the package manager to install libmariadb-dev automatically for you, if your app depends on libmariadbclient-dev . But in this case libmariadbclient-dev version 10.1.47 comes from bionic repos, while version 10.5.8 packages come from mariadb repos. otto , is there some way to tell apt to do the right thing without manual apt install libmariadb-dev ?

Otto Kekäläinen added a comment - 2021-01-07 17:43 This is not a bug. You are trying to install libmariadbclient-dev in Bionic, which tries to install MariaDB 10.1, but you have also enabled MariaDB 10.5 repositories. Logically, you should be using MariaDB 10.5 packages, which libmariadbclient-dev is not of. Instead you have libmariadb-dev (MariaDB Connector C, version 3). What exactly is your `criticall app that requires libmariadbclient-dev`? It should either work directly with libmariadb-dev or if it expects to find a special name for a .so file you can install libmariadb-dev-compat.

Philip orleans added a comment - 2021-01-07 19:13 Please close the case. I solved the issue. the package is not necessary.