+ifneq ($(patsubst %/local,%,$(DESTDIR)$(prefix)),/usr)
+## Can not have absolute symlinks because some binary packages build schemes
+## install files in nonstandard root. Best we can do is to notify the
+## builder or packager.
+ @echo "***"
+ @echo "For images in the INFO docs to work, do: "
+ @echo " (cd $(package_infodir) && ln -sf ../../doc/lilypond/Documentation/user/out-www/*png .)"
+ @echo "or add something like that to the postinstall script."
+ @echo "***"
+else