Index: scripts/upgrade.pl.in
===================================================================
--- old/scripts/upgrade.pl.in.orig
+++ new/scripts/upgrade.pl.in
@@ -44,6 +44,7 @@ else
 }
 
 $prefix    = "@prefix@";
+$datarootdir = "@datarootdir@";
 $datadir   = "@DATADIR@";
 $datadir   =~ s/wmakerconf//;
 $datadir   =~ s/\/$//;