What problem are you facing?

When using dynamic variables for the $set key TypeScript gives an error, but if I hardcode it to a number then I don't get an error. I believe this is a typing issue because the following code shouldn't have any type errors.

```ts
export interface AddStructureOptions

{   player: Player;   structure: Structure; }

export const addStructure = async (

{   player,   structure, }

: AddStructureOptions) =>

{   player.bases[0].structures[structure.position] = structure;   await db.players.updateOne(     \{ _id: player._id }

,
    {
      $set: {
        [`bases.0.structures.${structure.position}`]: structure,
      },
    }
  );
};
```

What driver and relevant dependency versions are you using?

4.13.0