--- a/configure	Sun Nov 30 19:58:22 2008 +0000
+++ b/configure	Sun Nov 30 19:58:41 2008 +0000
@@ -116,7 +116,9 @@
 then
 	if [ "$OSTYPE" = "debian" ]
 	then LUA_SUFFIX="5.1";
+	LUA_SUFFIX_SET=yes
 	LUA_INCDIR=/usr/include/lua5.1;
+	LUA_INCDIR_SET=yes
 	fi
 	if [ "$OSTYPE" = "macosx" ]
 	then LUA_INCDIR=/usr/local/include;