eclass/mysql-multilib-r1.eclass: if ! built_with_use ${CATEGORY}/${PN} server ; then eclass/mysql-multilib.eclass: if ! built_with_use ${CATEGORY}/${PN} server ; then eclass/mysql-multilib.eclass: if built_with_use ${CATEGORY}/${PN} minimal ; then eclass/mysql-v2.eclass: if built_with_use ${CATEGORY}/${PN} minimal ; then Also, did you confuse @MAINTAINER with @AUTHOR in the eclass?
Fixed with commit https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=b5944645a6fd8b8dc9eb3c6e4a90176b582f0467