[logback-user] OSGi Application: Janino on classpath?

Hello everybody I want to use conditional processing in my logback.xml of my OSGi application. I learnt that I have to add the Janino library (and the Janino commons-compiler) to the application's classpath. I do that and let the OSGi container (*equinox*) start these libraries. However, I still get the error '*ERROR in ch.qos.logback.core.model.processor.conditional.IfModelHandler - Could not find Janino library on the class path. Skipping conditional processing.*'. What is the proper way to add the Janino library to the classpath (in an OSGi application)? Note: I've also downloaded and added 'janino-fragment' from logback-contrib. Still the same result. Best, Benno