diff --git a/.gitignore b/.gitignore
index 1e7a1e198..ea2fce879 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,4 +17,5 @@ local_build/*compiler*.jar
 local_build/local_*_compressed.js
 chromedriver
 typings/tmp/*
+built/
 dist/
diff --git a/scripts/gulpfiles/config.js b/scripts/gulpfiles/config.js
index 370b5a79b..4008b6304 100644
--- a/scripts/gulpfiles/config.js
+++ b/scripts/gulpfiles/config.js
@@ -14,7 +14,7 @@ var path = require('path');
 // trailing slash.
 module.exports = {
   // Directory to write compiled output to.
-  BUILD_DIR: '.',
+  BUILD_DIR: 'built',
 
   // Directory in which to assemble (and from which to publish) the
   // blockly npm package.