DOCUMENTATION_INCLUDES = \
-I $(top-src-dir)/Documentation/user \
-I $(top-build-dir)/Documentation/user/$(outdir)
-DOCUMENTATION_INCLUDES += $(foreach lang,$(LANGS), -I $(top-build-dir)/Documentation/$(lang)/user/$(outdir))
LILYPOND_BOOK_INCLUDES += $(DOCUMENTATION_INCLUDES)
MAKEINFO_FLAGS += --force --enable-encoding -D 'version $(TOPLEVEL_VERSION)' $(DOCUMENTATION_INCLUDES)
MAKEINFO = LANG= $(MAKEINFO_PROGRAM) $(MAKEINFO_FLAGS)
-TEXI2HTML_FLAGS += --init-file=$(top-src-dir)/lilypond-texi2html.init --css-ref=lilypond.css $(DOCUMENTATION_INCLUDES)
-TEXI2HTML = $(TEXI2HTML_PROGRAM) $(TEXI2HTML_FLAGS)
+TEXI2HTML_FLAGS =
+TEXI2HTML_INIT = --init-file=$(top-src-dir)/lilypond-texi2html.init
+TEXI2HTML = LANG= $(TEXI2HTML_PROGRAM) $(TEXI2HTML_FLAGS)
TEXI2PDF_FLAGS += --batch --tidy --command '@set version $(TOPLEVEL_VERSION)'
TEXI2PDF_FLAGS += $(DOCUMENTATION_INCLUDES)