react-hot-loader: React DevTools `Show Source` is not working

I tried to view source of component in React Panel

But it ended up with somewhere in makeAssimilatePrototype.js

module.exports = function makeAssimilatePrototype() {
  var storedPrototype,
      knownPrototypes = [];

  function wrapMethod(key) {
    return function () {
      if (storedPrototype[key]) {
        return storedPrototype[key].apply(this, arguments);
      }
    };
  }