-I $(top-build-dir)/Documentation/$(outdir)
LILYPOND_BOOK_INCLUDES += $(DOCUMENTATION_INCLUDES)
-MAKEINFO_FLAGS += --force --enable-encoding $(DOCUMENTATION_INCLUDES)
+MAKEINFO_FLAGS += --enable-encoding $(DOCUMENTATION_INCLUDES)
MAKEINFO = LANG= $(MAKEINFO_PROGRAM) $(MAKEINFO_FLAGS)
# texi2html xref map files