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.
expirationTime = computeAsyncExpiration(currentTime);
      }
      
      
      if (nextRoot !== null && expirationTime === nextRenderExpirationTime) {
        expirationTime += 1;
      }
    } else {
      
      expirationTime = Sync;
    }
  }
  if (isBatchingInteractiveUpdates) {
    
    
    
    if (
      lowestPriorityPendingInteractiveExpirationTime === NoWork ||
      expirationTime > lowestPriorityPendingInteractiveExpirationTime
    ) {
      lowestPriorityPendingInteractiveExpirationTime = expirationTime;
    }
  }
  return expirationTime;
}
function renderDidSuspend(
  root: FiberRoot,
  absoluteTimeoutMs: number,
  suspendedTime: ExpirationTime,
) {