diff --git a/.flowconfig b/.flowconfig
index 4c85601032..7f5c39617c 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -3,6 +3,7 @@
 <PROJECT_ROOT>/examples/.*
 <PROJECT_ROOT>/fixtures/.*
 <PROJECT_ROOT>/build/.*
+<PROJECT_ROOT>/scripts/.*
 <PROJECT_ROOT>/.*/node_modules/y18n/.*
 <PROJECT_ROOT>/.*/__mocks__/.*
 <PROJECT_ROOT>/.*/__tests__/.*
diff --git a/src/fb/ReactDOMFBEntry.js b/src/fb/ReactDOMFBEntry.js
index c03749863f..ecbcced37d 100644
--- a/src/fb/ReactDOMFBEntry.js
+++ b/src/fb/ReactDOMFBEntry.js
@@ -5,8 +5,6 @@
  * This source code is licensed under the BSD-style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
- *
- * @providesModule ReactDOMFBEntry
  */
 
 'use strict';
diff --git a/src/fb/ReactDOMFiberFBEntry.js b/src/fb/ReactDOMFiberFBEntry.js
index dd81d26328..0f74af75d0 100644
--- a/src/fb/ReactDOMFiberFBEntry.js
+++ b/src/fb/ReactDOMFiberFBEntry.js
@@ -5,8 +5,6 @@
  * This source code is licensed under the BSD-style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
- *
- * @providesModule ReactDOMFBEntry
  */
 
 'use strict';
diff --git a/src/fb/ReactFBEntry.js b/src/fb/ReactFBEntry.js
index c369345974..74add5c91b 100644
--- a/src/fb/ReactFBEntry.js
+++ b/src/fb/ReactFBEntry.js
@@ -5,8 +5,6 @@
  * This source code is licensed under the BSD-style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
- *
- * @providesModule ReactUMDEntry
  */
 
 'use strict';
diff --git a/src/renderers/native/NativeMethodsMixin.js b/src/renderers/native/NativeMethodsMixin.js
index 7d5da83f5a..e02e6d6a9d 100644
--- a/src/renderers/native/NativeMethodsMixin.js
+++ b/src/renderers/native/NativeMethodsMixin.js
@@ -21,7 +21,9 @@ var findNodeHandle = require('findNodeHandle');
 
 var ReactNative;
 
-function injectReactNative(RN) {
+// TODO: figure this out when we work on flat bundles in RN.
+// This might not be needed after all.
+function injectReactNative(RN : $FlowFixMe) {
   ReactNative = RN;
 }
 
diff --git a/yarn.lock b/yarn.lock
index f435e34c1f..d64c17fb41 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -548,6 +548,12 @@ babel-plugin-eval@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-eval/-/babel-plugin-eval-1.0.1.tgz#a2faed25ce6be69ade4bfec263f70169195950da"
 
+babel-plugin-external-helpers@^6.22.0:
+  version "6.22.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-external-helpers/-/babel-plugin-external-helpers-6.22.0.tgz#2285f48b02bd5dede85175caf8c62e86adccefa1"
+  dependencies:
+    babel-runtime "^6.22.0"
+
 babel-plugin-inline-environment-variables@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-inline-environment-variables/-/babel-plugin-inline-environment-variables-1.0.1.tgz#1f58ce91207ad6a826a8bf645fafe68ff5fe3ffe"
@@ -2044,7 +2050,7 @@ estree-walker@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.3.1.tgz#e6b1a51cf7292524e7237c312e5fe6660c1ce1aa"
 
-esutils@^2.0.0, esutils@^2.0.2, esutils@^2.0.2:
+esutils@2.0.2, esutils@^2.0.0, esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
 
@@ -4027,6 +4033,10 @@ natural-compare@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
 
+ncp@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ncp/-/ncp-2.0.0.tgz#195a21d6c46e361d2fb1281ba38b91e9df7bdbb3"
+
 node-fetch@^1.0.1:
   version "1.6.3"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.6.3.tgz#dc234edd6489982d58e8f0db4f695029abcd8c04"
@@ -4767,6 +4777,12 @@ rimraf@2, rimraf@^2.2.8, rimraf@^2.4.3, rimraf@^2.4.4, rimraf@~2.5.1, rimraf@~2.
   dependencies:
     glob "^7.0.5"
 
+rimraf@^2.6.1:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.1.tgz#c2338ec643df7a1b7fe5c54fa86f57428a55f33d"
+  dependencies:
+    glob "^7.0.5"
+
 rimraf@~2.2.1, rimraf@~2.2.8:
   version "2.2.8"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.2.8.tgz#e439be2aaee327321952730f99a8929e4fc50582"