https://downloads.mariadb.org/connector-c/+releases/ dev-db/mariadb-connector-c-3.0.10 was released on 2019-05-13. Release Status = Stable dev-db/mariadb-connector-c-3.1.0 was released on 2019-04-09. Release Status = RC dev-db/mariadb-connector-c-3.1.1 was released on 2019-06-06. Release Status = RC Adding only dev-db/mariadb-connector-c-3.0.10 might suffice for now.