+$(EPUB): $(AONROOTDIR)/$(BLANG)/epub/$(SERIES)/$(BASENAME)/$(EPUB) ebook-convert
+ @[ ! -x `which dbtoepub` ] || { echo "ERROR: Cannot find 'dbtoepub', please install this package" >&2; exit 1; }
+ dbtoepub -o $(BOOK) $(XMLFILE) >$(BOOK).log 2>&1; \