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.
});
      }
    }
    const subscriber = __subscriberRef.current;
    if (subscriber !== null) {
      const threadID = computeThreadID(
        expirationTime,
        root.interactionThreadID,
      );
      subscriber.onWorkScheduled(interactions, threadID);
    }
  }
}
function scheduleWork(fiber: Fiber, expirationTime: ExpirationTime) {
  recordScheduleUpdate();
  if (__DEV__) {
    if (fiber.tag === ClassComponent || fiber.tag === ClassComponentLazy) {
      const instance = fiber.stateNode;
      warnAboutInvalidUpdates(instance);
    }
  }
  const root = scheduleWorkToRoot(fiber, expirationTime);
  if (root === null) {
    if (
      __DEV__ &&
      (fiber.tag === ClassComponent || fiber.tag === ClassComponentLazy)
    ) {
      warnAboutUpdateOnUnmounted(fiber);
    }
    return;