diff --git a/s/cmake-init b/s/cmake-init
index 9d529a433..3d4e073a7 100755
--- a/s/cmake-init
+++ b/s/cmake-init
@@ -38,15 +38,21 @@ ARGS=" -DCMAKE_BUILD_TYPE=$BUILD \
 
 git submodule update --init
 
+LUA_VERSION="5.2"
+LUA_DIR=/usr
+if [ -d /usr/include/lua5.1 ]; then
+   LUA_VERSION="5.1"
+elif [ -d /usr/local/include/lua5.1 ]; then
+   LUA_DIR=/usr/local
+   LUA_VERSION="5.1"
+fi
+export LUA_DIR
+
 path="$(which tolua)"
 if [ "$HAVE_TOLUA" = "0" ] || [ -z $path ] ; then
  echo "tolua is not installed, building from source"
  cd $ROOT
  if [ ! -d tolua ]; then
-  LUA_VERSION="5.2"
-  if [ -d /usr/include/lua5.1 ] || [ -d /usr/local/include/lua5.1 ]; then
-   LUA_VERSION="5.1"
-  fi
   echo "fetching tolua ${LUA_VERSION} from github..."
   git clone https://github.com/ennorehling/tolua-${LUA_VERSION}.git tolua
  fi