diff --git a/build/post-install.js b/build/post-install.js
index 4329c93f0..0d8c37824 100644
--- a/build/post-install.js
+++ b/build/post-install.js
@@ -76,8 +76,8 @@
 
   /*--------------------------------------------------------------------------*/
 
-  exec('npm -g root', function(exception, stdout, stderr) {
-    if (exception || stderr) {
+  exec('npm -g root', function(exception, stdout) {
+    if (exception) {
       console.error('There was a problem loading the npm registry.');
       process.exit(1);
     }