diff --git a/local-cli/bundle/output/bundle.js b/local-cli/bundle/output/bundle.js
index 54eab0587..70e8a1941 100644
--- a/local-cli/bundle/output/bundle.js
+++ b/local-cli/bundle/output/bundle.js
@@ -13,7 +13,10 @@ const meta = require('./meta');
 const writeFile = require('./writeFile');
 
 function buildBundle(packagerClient, requestOptions) {
-  return packagerClient.buildBundle(requestOptions);
+  return packagerClient.buildBundle({
+    ...requestOptions,
+    isolateModuleIDs: true,
+  });
 }
 
 function createCodeWithMap(bundle, dev) {
diff --git a/packager/react-packager/src/Bundler/index.js b/packager/react-packager/src/Bundler/index.js
index d2053fa1b..8ee861d2a 100644
--- a/packager/react-packager/src/Bundler/index.js
+++ b/packager/react-packager/src/Bundler/index.js
@@ -530,12 +530,14 @@ class Bundler {
 
   _toModuleTransport({module, bundle, entryFilePath, transformOptions, getModuleId}) {
     let moduleTransport;
+    const moduleId = getModuleId(module);
+
     if (module.isAsset_DEPRECATED()) {
       moduleTransport =
-        this._generateAssetModule_DEPRECATED(bundle, module, getModuleId);
+        this._generateAssetModule_DEPRECATED(bundle, module, moduleId);
     } else if (module.isAsset()) {
       moduleTransport = this._generateAssetModule(
-        bundle, module, getModuleId, transformOptions.platform);
+        bundle, module, moduleId, transformOptions.platform);
     }
 
     if (moduleTransport) {
@@ -556,7 +558,7 @@ class Bundler {
 
       return new ModuleTransport({
         name,
-        id: getModuleId(module),
+        id: moduleId,
         code,
         map,
         meta: {dependencies, dependencyOffsets, preloaded},
@@ -566,7 +568,7 @@ class Bundler {
     });
   }
 
-  _generateAssetModule_DEPRECATED(bundle, module, getModuleId) {
+  _generateAssetModule_DEPRECATED(bundle, module, moduleId) {
     return Promise.all([
       sizeOf(module.path),
       module.getName(),
@@ -586,7 +588,7 @@ class Bundler {
 
       return new ModuleTransport({
         name: id,
-        id: getModuleId(module),
+        id: moduleId,
         code: code,
         sourceCode: code,
         sourcePath: module.path,
@@ -645,7 +647,7 @@ class Bundler {
   }
 
 
-  _generateAssetModule(bundle, module, getModuleId, platform = null) {
+  _generateAssetModule(bundle, module, moduleId, platform = null) {
     return Promise.all([
       module.getName(),
       this._generateAssetObjAndCode(module, platform),
@@ -653,7 +655,7 @@ class Bundler {
       bundle.addAsset(asset);
       return new ModuleTransport({
         name,
-        id: getModuleId(module),
+        id: moduleId,
         code,
         meta: meta,
         sourceCode: code,