$(PYTHON) $(LILYPOND_BOOK) $(LILYPOND_BOOK_INCLUDES) \
--process='$(LILYPOND_BOOK_PROCESS) \
$(LILYPOND_BOOK_LILYPOND_FLAGS)' --output=$(outdir) \
$(PYTHON) $(LILYPOND_BOOK) $(LILYPOND_BOOK_INCLUDES) \
--process='$(LILYPOND_BOOK_PROCESS) \
$(LILYPOND_BOOK_LILYPOND_FLAGS)' --output=$(outdir) \