diff --git a/react-packager/src/node-haste/__tests__/DependencyGraph-test.js b/react-packager/src/node-haste/__tests__/DependencyGraph-test.js
index 131c06c3..9341c3cc 100644
--- a/react-packager/src/node-haste/__tests__/DependencyGraph-test.js
+++ b/react-packager/src/node-haste/__tests__/DependencyGraph-test.js
@@ -8,104 +8,13 @@
  */
 'use strict';
 
-jest.autoMockOff();
+jest.disableAutomock();
 jest.useRealTimers();
 jest
   .mock('fs')
   .mock('../../Logger')
   .mock('../../lib/TransformCache');
 
-// This is an ugly hack:
-// * jest-haste-map uses `find` for fast file system crawling which won't work
-//   when we mock the file system in node. This mock copies the node crawler's
-//   implementation and always falls back to the node crawling mechanism.
-//   Ideally we'll make this an option in jest-haste-map to force it to use
-//   the node crawler.
-jest.mock('jest-haste-map/build/crawlers/node', () => {
-  const H = require('jest-haste-map/build/constants');
-
-  const fs = require('fs');
-  const path = require('path');
-
-  function find(
-  roots,
-  extensions,
-  ignore,
-  callback)
-  {
-    const result = [];
-    let activeCalls = 0;
-
-    function search(directory) {
-      activeCalls++;
-      fs.readdir(directory, (err, names) => {
-        activeCalls--;
-
-        names.forEach(file => {
-          file = path.join(directory, file);
-          if (ignore(file)) {
-            return;
-          }
-          activeCalls++;
-
-          fs.lstat(file, (err, stat) => {
-            activeCalls--;
-
-            if (!err && stat && !stat.isSymbolicLink()) {
-              if (stat.isDirectory()) {
-                search(file);
-              } else {
-                const ext = path.extname(file).substr(1);
-                if (extensions.indexOf(ext) !== -1) {
-                  result.push([file, stat.mtime.getTime()]);
-                }
-              }
-            }
-            if (activeCalls === 0) {
-              callback(result);
-            }
-          });
-        });
-
-        if (activeCalls === 0) {
-          callback(result);
-        }
-      });
-    }
-
-    roots.forEach(search);
-  }
-
-  return function nodeCrawl(
-  roots,
-  extensions,
-  ignore,
-  data)
-  {
-    return new Promise(resolve => {
-      const callback = list => {
-        const files = Object.create(null);
-        list.forEach(fileData => {
-          const name = fileData[0];
-          const mtime = fileData[1];
-          const existingFile = data.files[name];
-          if (existingFile && existingFile[H.MTIME] === mtime) {
-            files[name] = existingFile;
-          } else {
-            // See ../constants.js
-            files[name] = ['', mtime, 0, []];
-          }
-        });
-        data.files = files;
-        resolve(data);
-      };
-
-      find(roots, extensions, ignore, callback);
-    });
-  };
-
-});
-
 const mocksPattern = /(?:[\\/]|^)__mocks__[\\/]([^\/]+)\.js$/;
 
 jasmine.DEFAULT_TIMEOUT_INTERVAL = 10000;
@@ -192,6 +101,7 @@ describe('DependencyGraph', function() {
       assetExts: ['png', 'jpg'],
       cache: new Cache(),
       fileWatcher,
+      forceNodeFilesystemAPI: true,
       providesModuleNodeModules: [
         'haste-fbjs',
         'react-haste',
diff --git a/react-packager/src/node-haste/index.js b/react-packager/src/node-haste/index.js
index 9d1e7fb4..22fa89ba 100644
--- a/react-packager/src/node-haste/index.js
+++ b/react-packager/src/node-haste/index.js
@@ -55,6 +55,7 @@ class DependencyGraph {
     roots: Array<string>,
     ignoreFilePath: (filePath: string) => boolean,
     fileWatcher: FileWatcher,
+    forceNodeFilesystemAPI: boolean,
     assetRoots_DEPRECATED: Array<string>,
     assetExts: Array<string>,
     providesModuleNodeModules: mixed,
@@ -88,6 +89,7 @@ class DependencyGraph {
     roots,
     ignoreFilePath,
     fileWatcher,
+    forceNodeFilesystemAPI,
     assetRoots_DEPRECATED,
     assetExts,
     providesModuleNodeModules,
@@ -112,6 +114,7 @@ class DependencyGraph {
     roots: Array<string>,
     ignoreFilePath: (filePath: string) => boolean,
     fileWatcher: FileWatcher,
+    forceNodeFilesystemAPI?: boolean,
     assetRoots_DEPRECATED: Array<string>,
     assetExts: Array<string>,
     providesModuleNodeModules: mixed,
@@ -136,6 +139,7 @@ class DependencyGraph {
       roots,
       ignoreFilePath: ignoreFilePath || (() => {}),
       fileWatcher,
+      forceNodeFilesystemAPI: !!forceNodeFilesystemAPI,
       assetRoots_DEPRECATED: assetRoots_DEPRECATED || [],
       assetExts: assetExts || [],
       providesModuleNodeModules,
@@ -171,6 +175,7 @@ class DependencyGraph {
     const mw = this._opts.maxWorkers;
     const haste = new JestHasteMap({
       extensions: this._opts.extensions.concat(this._opts.assetExts),
+      forceNodeFilesystemAPI: this._opts.forceNodeFilesystemAPI,
       ignorePattern: {test: this._opts.ignoreFilePath},
       maxWorkers: typeof mw === 'number' && mw >= 1 ? mw : getMaxWorkers(),
       mocksPattern: '',