diff --git a/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js b/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js
index 471e60691..e2f0fd980 100644
--- a/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js
+++ b/packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js
@@ -1809,6 +1809,77 @@ describe('DependencyGraph', function() {
       });
     });
 
+    pit('platform should work with node_modules', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.ios.js': [
+            '/**',
+            ' * @providesModule index',
+            ' */',
+            'require("foo");',
+            'require("bar");',
+          ].join('\n'),
+          'node_modules': {
+            'foo': {
+              'package.json': JSON.stringify({
+                name: 'foo',
+              }),
+              'index.ios.js': '',
+            },
+            'bar': {
+              'package.json': JSON.stringify({
+                name: 'bar',
+                main: 'main'
+              }),
+              'main.ios.js': '',
+            },
+          },
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher,
+        assetExts: ['png', 'jpg'],
+      });
+      return dgraph.getOrderedDependencies('/root/index.ios.js').then(function(deps) {
+        expect(deps)
+          .toEqual([
+            {
+              id: 'index',
+              path: '/root/index.ios.js',
+              dependencies: ['foo', 'bar'],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+            {
+              id: 'foo/index.ios.js',
+              path: '/root/node_modules/foo/index.ios.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+            {
+              id: 'bar/main.ios.js',
+              path: '/root/node_modules/bar/main.ios.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+         ]);
+      });
+    });
+
     pit('nested node_modules with specific paths', function() {
       var root = '/root';
       fs.__setMockFilesystem({
@@ -2333,6 +2404,169 @@ describe('DependencyGraph', function() {
           ]);
       });
     });
+
+    pit('should work with multiple platforms (haste)', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.ios.js': `
+            /**
+             * @providesModule index
+             */
+             require('a');
+          `,
+          'a.ios.js': `
+            /**
+             * @providesModule a
+             */
+          `,
+          'a.android.js': `
+            /**
+             * @providesModule a
+             */
+          `,
+          'a.js': `
+            /**
+             * @providesModule a
+             */
+          `,
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher,
+        assetExts: ['png', 'jpg'],
+      });
+      return dgraph.getOrderedDependencies('/root/index.ios.js').then(function(deps) {
+        expect(deps)
+          .toEqual([
+            {
+              id: 'index',
+              path: '/root/index.ios.js',
+              dependencies: ['a'],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+            {
+              id: 'a',
+              path: '/root/a.ios.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+          ]);
+      });
+    });
+
+    pit('should pick the generic file', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.ios.js': `
+            /**
+             * @providesModule index
+             */
+             require('a');
+          `,
+          'a.android.js': `
+            /**
+             * @providesModule a
+             */
+          `,
+          'a.js': `
+            /**
+             * @providesModule a
+             */
+          `,
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher,
+        assetExts: ['png', 'jpg'],
+      });
+      return dgraph.getOrderedDependencies('/root/index.ios.js').then(function(deps) {
+        expect(deps)
+          .toEqual([
+            {
+              id: 'index',
+              path: '/root/index.ios.js',
+              dependencies: ['a'],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+            {
+              id: 'a',
+              path: '/root/a.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+          ]);
+      });
+    });
+
+    pit('should work with multiple platforms (node)', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.ios.js': `
+            /**
+             * @providesModule index
+             */
+             require('./a');
+          `,
+          'a.ios.js': '',
+          'a.android.js': '',
+          'a.js': '',
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher,
+        assetExts: ['png', 'jpg'],
+      });
+      return dgraph.getOrderedDependencies('/root/index.ios.js').then(function(deps) {
+        expect(deps)
+          .toEqual([
+            {
+              id: 'index',
+              path: '/root/index.ios.js',
+              dependencies: ['./a'],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+            {
+              id: '/root/a.ios.js',
+              path: '/root/a.ios.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: false,
+              isPolyfill: false,
+              resolution: undefined,
+            },
+          ]);
+      });
+    });
   });
 
   describe('file watch updating', function() {
diff --git a/packager/react-packager/src/DependencyResolver/DependencyGraph/index.js b/packager/react-packager/src/DependencyResolver/DependencyGraph/index.js
index e05575db7..0a8c00765 100644
--- a/packager/react-packager/src/DependencyResolver/DependencyGraph/index.js
+++ b/packager/react-packager/src/DependencyResolver/DependencyGraph/index.js
@@ -56,6 +56,10 @@ const validateOpts = declareOpts({
       'parse',
     ],
   },
+  platforms: {
+    type: 'array',
+    default: ['ios', 'android'],
+  }
 });
 
 class DependencyGraph {
@@ -169,6 +173,13 @@ class DependencyGraph {
         );
       }
 
+      const platformExt = getPlatformExt(entryPath);
+      if (platformExt && this._opts.platforms.indexOf(platformExt) > -1) {
+        this._platformExt = platformExt;
+      } else {
+        this._platformExt = null;
+      }
+
       const entry = this._moduleCache.getModule(absolutePath);
       const deps = [];
       const visited = Object.create(null);
@@ -237,16 +248,14 @@ class DependencyGraph {
     }
 
     return p.then((realModuleName) => {
-      let dep = this._hasteMap[realModuleName];
-
+      let dep = this._getHasteModule(realModuleName);
       if (dep && dep.type === 'Module') {
         return dep;
       }
 
       let packageName = realModuleName;
-
       while (packageName && packageName !== '.') {
-        dep = this._hasteMap[packageName];
+        dep = this._getHasteModule(packageName);
         if (dep && dep.type === 'Package') {
           break;
         }
@@ -349,6 +358,9 @@ class DependencyGraph {
       let file;
       if (this._fastfs.fileExists(potentialModulePath)) {
         file = potentialModulePath;
+      } else if (this._platformExt != null &&
+                 this._fastfs.fileExists(potentialModulePath + '.' + this._platformExt + '.js')) {
+        file = potentialModulePath + '.' + this._platformExt + '.js';
       } else if (this._fastfs.fileExists(potentialModulePath + '.js')) {
         file = potentialModulePath + '.js';
       } else if (this._fastfs.fileExists(potentialModulePath + '.json')) {
@@ -419,15 +431,32 @@ class DependencyGraph {
   }
 
   _updateHasteMap(name, mod) {
-    if (this._hasteMap[name]) {
-      debug('WARNING: conflicting haste modules: ' + name);
-      if (mod.type === 'Package' &&
-          this._hasteMap[name].type === 'Module') {
-        // Modules takes precendence over packages.
-        return;
-      }
+    if (this._hasteMap[name] == null) {
+      this._hasteMap[name] = [];
     }
-    this._hasteMap[name] = mod;
+
+    if (mod.type === 'Module') {
+      // Modules takes precendence over packages.
+      this._hasteMap[name].unshift(mod);
+    } else {
+      this._hasteMap[name].push(mod);
+    }
+  }
+
+  _getHasteModule(name) {
+    if (this._hasteMap[name]) {
+      const modules = this._hasteMap[name];
+      if (this._platformExt != null) {
+        for (let i = 0; i < modules.length; i++) {
+          if (getPlatformExt(modules[i].path) === this._platformExt) {
+            return modules[i];
+          }
+        }
+      }
+
+      return modules[0];
+    }
+    return null;
   }
 
   _isNodeModulesDir(file) {
@@ -511,12 +540,17 @@ class DependencyGraph {
       return;
     }
 
+    /*eslint no-labels: 0 */
     if (type === 'delete' || type === 'change') {
-      _.each(this._hasteMap, (mod, name) => {
-        if (mod.path === absPath) {
-          delete this._hasteMap[name];
+      loop: for (let name in this._hasteMap) {
+        let modules = this._hasteMap[name];
+        for (var i = 0; i < modules.length; i++) {
+          if (modules[i].path === absPath) {
+            modules.splice(i, 1);
+            break loop;
+          }
         }
-      });
+      }
 
       if (type === 'delete') {
         return;
@@ -566,6 +600,15 @@ function normalizePath(modulePath) {
   return modulePath.replace(/\/$/, '');
 }
 
+// Extract platform extension: index.ios.js -> ios
+function getPlatformExt(file) {
+  const parts = path.basename(file).split('.');
+  if (parts.length < 3) {
+    return null;
+  }
+  return parts[parts.length - 2];
+}
+
 util.inherits(NotFoundError, Error);
 
 module.exports = DependencyGraph;