--- a/script/build.py
+++ b/script/build.py
@@ -19,7 +19,7 @@ 
   # Update the VS build env.
   import_vs_env(get_target_arch())
 
-  ninja = os.path.join('vendor', 'depot_tools', 'ninja')
+  ninja = 'ninja'
   if sys.platform == 'win32':
     ninja += '.exe'