diff --git a/scripts/build/babel-register.js b/scripts/build/babel-register.js
index cc1513fa1abf3c..e06fadd3910f9e 100644
--- a/scripts/build/babel-register.js
+++ b/scripts/build/babel-register.js
@@ -30,7 +30,11 @@ function registerForMonorepo() {
     return;
   }
 
-  require('metro-babel-register')([PACKAGES_DIR]);
+  if (process.env.FBSOURCE_ENV === '1') {
+    require('@fb-tools/babel-register');
+  } else {
+    require('metro-babel-register')([PACKAGES_DIR]);
+  }
 
   isRegisteredForMonorepo = true;
 }