This was copied and modified from another, similar ebuild
However this piece was missed.
Package-Manager: Portage-2.3.42, Repoman-2.3.9
RDEPEND="selinux? ( sec-policy/selinux-mysql )
abi_x86_32? ( !app-emulation/emul-linux-x86-db[-abi_x86_32(-)] )
client-libs? ( !dev-db/mariadb-connector-c[mysqlcompat] !dev-db/mysql-connector-c )
- !dev-db/mariadb !dev-db/mariadb-galera !dev-db/percona-server !dev-db/mysql-cluster
+ !dev-db/mariadb !dev-db/mariadb-galera !dev-db/mysql !dev-db/mysql-cluster
server? ( !prefix? ( dev-db/mysql-init-scripts ) )
${COMMON_DEPEND}
"