From iwdevtools: * VDB: detected possibly incorrect RDEPEND (app-admin/syslog-ng-4.4.0-r2) * dev-libs/libpcre2 | dev-libs/libpcre2:= * > net-libs/paho-mqtt-c:1.3 There seems to be another automagic dependency wrt to MQTT: https://github.com/search?q=repo%3Asyslog-ng%2Fsyslog-ng%20paho-mqtt&type=code