--- configure.orig	2000-05-03 12:27:53.000000000 +1000
+++ configure	2011-05-31 09:56:59.000000000 +1000
@@ -4154,7 +4154,8 @@
 
 echo $ac_n "checking for System V pty calls""... $ac_c" 1>&6
 echo "configure:4157: checking for System V pty calls" >&5
-if eval "test \"`echo '$''{'vi_cv_sys5_pty'+set}'`\" = set"; then
+if true; then
+  vi_cv_sys5_pty=no
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF