--- a/Po4aBuilder.pm	2024-09-14 15:48:58.642546000 +0800
+++ b/Po4aBuilder.pm	2024-09-14 15:50:38.415546000 +0800
@@ -242,15 +242,17 @@ sub ACTION_man {
         foreach $file (qw(po4a-display-man.xml po4a-display-pod.xml)) {
             copy ( File::Spec->catdir("share", "doc", $file), $man1path) or die;
         }
+	my $docbook_xsl_url   = "http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl";
+	my $local_docbook_xsl = `xmlcatalog --noout "" "$docbook_xsl_url"` =~ m,file://(.+\.xsl), && $1;
         foreach $file (@{$self->rscan_dir($manpath, qr{\.xml$})}) {
             if ($file =~ m,(.*/man(.))/([^/]*)\.xml$,) {
                 my ($outdir, $section, $outfile) = ($1, $2, $3);
-            if (-e "/usr/share/xml/docbook/stylesheet/docbook-xsl/manpages/docbook.xsl") { # Location on Debian at least
+            if ($local_docbook_xsl) {
             print "Convert $outdir/$outfile.$section (local docbook.xsl file). ";
-            system("xsltproc -o $outdir/$outfile.$section --nonet /usr/share/xml/docbook/stylesheet/docbook-xsl/manpages/docbook.xsl $file") and die;
+            system("xsltproc -o $outdir/$outfile.$section --nonet $local_docbook_xsl $file") and die;
             } else { # Not found locally, use the XSL file online
             print "Convert $outdir/$outfile.$section (online docbook.xsl file). ";
-            system("xsltproc -o $outdir/$outfile.$section --nonet http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl $file") and die;
+            system("xsltproc -o $outdir/$outfile.$section --nonet $docbook_xsl_url $file") and die;
             }
             }
             unlink "$file" || die;