$(PYTHON) $(MIDI2LY) $(shell cat $(outdir)/$*.options) --quiet --include-header=$(outdir)/$*.header -o $(outdir) $<
$(outdir)/%.diff: %.ly $(outdir)/%-midi.ly
$(PYTHON) $(MIDI2LY) $(shell cat $(outdir)/$*.options) --quiet --include-header=$(outdir)/$*.header -o $(outdir) $<
$(outdir)/%.diff: %.ly $(outdir)/%-midi.ly