-s{"http://docbook.sourceforge.net/release/xsl/current/}
- {"/usr/share/xml/docbook/stylesheet/nwalsh/1.71.1/};
+-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/};