+sub filter_linux
+{
+# SUSE 10 with extra pkgs
+-d "/usr/share/xml/docbook/stylesheet/nwalsh/1.71.1/" &&
+ s{"http://docbook.sourceforge.net/release/xsl/current/}
+ {"/usr/share/xml/docbook/stylesheet/nwalsh/1.71.1/};
+# Ubuntu/Debian with standard docbook-xsl pkgs
+-d "/usr/share/xml/docbook/stylesheet/docbook-xsl/" &&
+ s{"http://docbook.sourceforge.net/release/xsl/current/}
+ {"/usr/share/xml/docbook/stylesheet/docbook-xsl/};
+s{"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"}
+ {"/usr/share/xml/docbook/schema/dtd/4.2/docbookx.dtd"};
+}
+