diff --git a/install.sh b/install.sh
index 8ae7ce3..ca0a49f 100644
--- a/install.sh
+++ b/install.sh
@@ -231,6 +231,8 @@ fi
 # Which node.js VERSION ? #
 #########################
 
+NODE_VERSION=${NODE_VERSION:-}
+NODEJS_VER=${NODE_VERSION:-$NODEJS_VER}
 if [ -z "${NODEJS_VER:-}" ]; then
   # For backwards compat
   if [ -f "$my_tmp/NODEJS_VER" ]; then