Something

steve@kazzenkatt:~/src/geoqo$ svn diff
Index: Makefile.PL
===================================================================
--- Makefile.PL (revision 548)
+++ Makefile.PL (working copy)
@@ -16,8 +16,8 @@
 sub MY::postamble {
     return '

-SCRIPTSDIR=$(DESTDIR)/usr/share/geoqo/scripts
-DATADIR=$(DESTDIR)/usr/share/geoqo/
+SCRIPTSDIR=$(DESTDIR)$(PREFIX)/share/geoqo/scripts
+DATADIR=$(DESTDIR)$(PREFIX)/share/geoqo/

 INSTALL=$(PERL) "-MExtUtils::Command" -e cp