diff --git a/lib/unbuild.js b/lib/unbuild.js
index 67f1f2a9..d81c3389 100644
--- a/lib/unbuild.js
+++ b/lib/unbuild.js
@@ -77,6 +77,7 @@ var undent = function(code, n){
 
 	rm('./src');
 	mk('./src');
+	mk('./src/polyfill');
 	mk('./src/adapters');
 
 	var gun = read('gun.js');
@@ -84,7 +85,7 @@ var undent = function(code, n){
 
 
 	code = next("/* UNBUILD */");
-	write('src/unbuild.js', undent(code, 1));
+	write('src/polyfill/unbuild.js', undent(code, 1));
 
 	(function recurse(c){
 		code = next(";require(function(module){", "})(require");