book/index.html: ch*.xml help.xml
        mkdir -p book/images
        cp images/*.png book/images/
-       xsltproc -o book/ --xinclude ../xslt/html/chunk.xsl help.xml
+       xsltproc --stringparam chunker.output.encoding "utf-8" -o book/ --xinclude /usr/share/sgml/docbook/xsl-stylesheets/html/chunk.xsl help.xml
 
 help.pdf: ch*.xml help.xml
        dblatex -b xetex -I. help.xml