$(ASCIIDOC) -b docbook -d book $<
XSLT = http://docbook.sourceforge.net/release/xsl/current/html/docbook.xsl
-XSLTOPTS = --nonet --xinclude --stringparam html.stylesheet docbook-xsl.css
+XSLTOPTS = --xinclude --stringparam html.stylesheet docbook-xsl.css
user-manual.html: user-manual.xml
xsltproc $(XSLTOPTS) -o $@ $(XSLT) $<