Eager chain load ancestors, Model must be node error

[liepumartins]

I have products, and posts, that belong to category.

$products = Product::with('category.ancestors')->where('/*some constraints*/')->get()

However this results in Model must be node. thrown InvalidArgumentException …/vendor/kalnoy/nestedset/src/BaseRelation.php40

Reading through #271 I got the impression that this was fixed in #370.

Anyway what I ultimately need is this:
$products = Product::with('category.ancestors.posts')->where(..)->get()

And unfortunately I cannot approach this from other end e.g. Category::with('products')->with('ancestors')->with('posts') because Products have to be selected using different criteria than category.

EDIT: Currently I have to do something resource intensive as:

public function getAllPostsAttribute() {
    $posts = new Collection();
    $posts = $posts->merge($this->posts);
    foreach($this->ancestors as $ancestor) {
        $posts = $posts->merge($ancestor->posts);
    }
    return $posts;
}

This then gets called n times (as many unique categories there are in the products set)