I can't quite figure out how to use the profiling build. I aliased `react-dom` to `react-dom/profiling` but I get this error:

<img width="448" alt="screen shot 2018-09-08 at 20 17 02" src="https://user-images.githubusercontent.com/810438/45257816-2d405780-b3a4-11e8-9615-0b27abd0442b.png">
<img width="272" alt="screen shot 2018-09-08 at 20 17 06" src="https://user-images.githubusercontent.com/810438/45257817-2d405780-b3a4-11e8-8a08-f5a0650debfe.png">

I didn't want interactions, I just want profiling. What am I doing wrong?

To repro, use CRA, then eject, then add `react-dom` -> `react-dom/profiling` to alias in webpack prod config and build.
nextUnitOfWork = performUnitOfWork(nextUnitOfWork);
    }
  }
}
function renderRoot(
  root: FiberRoot,
  isYieldy: boolean,
  isExpired: boolean,
): void {
  invariant(
    !isWorking,
    'renderRoot was called recursively. This error is likely caused ' +
      'by a bug in React. Please file an issue.',
  );
  isWorking = true;
  ReactCurrentOwner.currentDispatcher = Dispatcher;
  const expirationTime = root.nextExpirationTimeToWorkOn;
  let prevInteractions: Set<Interaction> = (null: any);
  if (enableSchedulerTracking) {
    
    
    prevInteractions = __interactionsRef.current;
    __interactionsRef.current = root.memoizedInteractions;
  }
  
  
  if (
    expirationTime !== nextRenderExpirationTime ||
    root !== nextRoot ||
    nextUnitOfWork === null