Hi Andreas, On 2020-05-20 14:20, Andreas Tille wrote: > Any hint how to take this hurdle would be welcome. Try setting the CLASSPATH in your d/rules like this: export CLASSPATH := $(DEBJAR)/htsjdk.jar:$(DEBJAR)/picard.jar:$(DEBJAR)/commons-collections4.jar I did this in one of packages and it seemed to work. Hope this helps, Andrius