Index: help/Makefile.in
--- help/Makefile.in.orig
+++ help/Makefile.in
@@ -654,7 +654,7 @@ C/figures/%.png:
 
 # man pages now shares some detail with main Help
 %.1: %.xml C/refsynopsis.xml C/commandline_details.xml C/extending.xml C/userconfig.xml
-	$(XSLTPROC) -o $@ http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl $<
+	$(XSLTPROC) -o $@ $(prefix)/share/xsl/docbook/manpages/docbook.xsl $<
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
