+sub filter_darwin
+{
+# NB - this uses the Mac Ports installations
+s{"/usr/share/sgml/docbook/xsl-stylesheets-1.70.1/}
+ {"/opt/local/share/xsl/docbook-xsl/};
+s{"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"}
+ {"/opt/local/share/xml/docbook/4.2/docbookx.dtd"};
+}
+
+