LILYPOND = $(builddir)/lily/$(outconfbase)/lilypond
LILYPOND_BOOK = $(script-dir)/lilypond-book.py
LILYPOND_BOOK_INCLUDES = -I $(pwd) -I $(outdir) -I$(input-dir) -I $(input-dir)/tricks/ -I $(input-dir)/regression/ -I $(input-dir)/test/ -I $(input-dir)/tutorial/ -I $(builddir)/mf/$(outconfbase)/ -I $(builddir)/mf/out/
-LILYPOND_BOOK_FORMAT = texi
+
+#texi-html for www only:
+LILYPOND_BOOK_FORMAT=$(if $(subst out-www,,$(notdir $(outdir))),texi,texi-html)
LY2DVI = $(script-dir)/ly2dvi.py
LYS_TO_TELY = $(buildscript-dir)/lys-to-tely.py