ifeq ($(out),)
LILYPOND_BOOK_PROCESS = true
+LILYPOND_BOOK_FLAGS += --no-lily-run
else
LILYPOND_BOOK_PROCESS = $(LILYPOND_BINARY)
endif
+ifeq ($(out),test)
+LILYPOND_BOOK_FLAGS += --skip-png-check
+endif
TEXINPUTS=$(top-src-dir)/tex/::
export TEXINPUTS