Cannot configure RenderKitFactory through META-INF/services

If there is no render kit configured via WEB-INF/faces-config.xml, ServletContext init param or META-INF/faces-config.xml then JSF implementation must check META-INF/services directory for a file with a filename equal to the name of the factory.

From page 10-6 of the spec:

If a META-INF/services/

resource is visible to the web application class loader for the calling application (typically as a result of being present in the manifest of a JAR file), its first line is read and assumed to be the name of the factory implementation class to use.