Does Svelte have the mechanism to listen to only nested properties changes?

I need to do some logic on nested property change. I only found that thing to do that

$: c, console.log('updated');

This approach was suggested by official svelte developer from this Twitter thread.But svelte stores do not work properly with that. For instance I have following code:

<script>    import { writable } from 'svelte/store';    const s = writable({ x: 1, y: 2 });    $: $s && console.log('store updated');    $: $s.x && console.log('store x updated');</script><button on:click={() => $s.y++}>    Update y</button> 

The $: $s.x part will be triggered on change of $s.y. How to avoid that??

REPL to play around.

P.S. VueJS has the feature @Watch('s.x').