With '.ts' when building next it fails with following error:
```
18:56:07.172
ERROR in /vercel/2f45f54/pages/[org]/[dataset]/index.tsx(3,19):
18:56:07.172
3:19 File '/vercel/2f45f54/utils/index.ts' is not a module.
18:56:07.172
1 | import { GetServerSideProps } from 'next'
18:56:07.172
2 | import config from '../../../config'
18:56:07.172
> 3 | import utils from '../../../utils'
18:56:07.172
| ^
18:56:07.172
4 | import Head from 'next/head'
18:56:07.172
5 | import Nav from '../../../components/Nav'
18:56:07.172
6 | import About from '../../../components/dataset/About'
```
