diff --git a/upload_fs.sh b/upload_fs.sh
index 62aea1e..8fef588 100755
--- a/upload_fs.sh
+++ b/upload_fs.sh
@@ -7,7 +7,8 @@ set +v
 echo "Building..."
 
 cd ./www || (echo "No directory ./www" && exit 1)
-npm run build || (echo "Failed" && exit 2)
+npm install || (echo "Unable to install npm packages" && exit 2)
+npm run build || (echo "Failed" && exit 3)
 cd ..
 
 echo "Compress..."