diff --git a/local-cli/src/bundle.js b/local-cli/src/bundle.js
index c5ad3b8..b7dac3c 100644
--- a/local-cli/src/bundle.js
+++ b/local-cli/src/bundle.js
@@ -99,6 +99,9 @@ function readEntire(entry, zipFile) {
         },
         end() {
           resolve(Buffer.concat(buffers));
+        },
+        prependListener() {
+
         },
         on() {
         },
@@ -155,7 +158,7 @@ async function diffFromPPK(origin, next, output) {
 
   function addEntry(fn) {
     //console.log(fn);
-    if (addedEntry[fn]) {
+    if (!fn || addedEntry[fn]) {
       return;
     }
     const base = basename(fn);