LILYPOND_BOOK_INCLUDES = -I $(src-dir)/ -I $(outdir) -I $(input-dir) \
-I $(top-src-dir)/Documentation -I $(top-src-dir)/Documentation/snippets \
-I $(input-dir)/regression/ -I $(top-src-dir)/Documentation/included/ \
LILYPOND_BOOK_INCLUDES = -I $(src-dir)/ -I $(outdir) -I $(input-dir) \
-I $(top-src-dir)/Documentation -I $(top-src-dir)/Documentation/snippets \
-I $(input-dir)/regression/ -I $(top-src-dir)/Documentation/included/ \