title: React-Native: Requiring unknown module "react/lib/ReactPropTypesSecret"
body: <p>I am trying to compile the master branch of the react-native repo to submit a PR. I am following the docs <a href="https://facebook.github.io/react-native/docs/android-building-from-source.html" rel="noreferrer">https://facebook.github.io/react-native/docs/android-building-from-source.html</a></p>
  
  <p>But doing exactly what do docs says, I get the following error on android:</p>
  
  <p><code>Requiring unknown module "react/lib/ReactPropTypesSecret</code></p>
  
  <p>Also running on ios gives similar kind of error:</p>
  
  <p><code>Unable to resolve module react/lib/ReactPropTypesSecret from /Users/aakash/Projects/TestingPR/node_modules/react-native/Libraries/Utilities/deprecatedPropType.js: Unable to find this module in its module map or any of the node_modules directories under /Users/node_modules/react/lib/ReactPropTypesSecret</code></p>