MODULE_NOT_FOUND when running `yarn codelift dev`

I'm following the setup instructions. I run:

```
% yarn create next-app --example with-tailwindcss
# I name the app my-app
% cd my-app
% yarn add codelift --dev
```
and things seem to work. However, when I run:
```
yarn codelift dev
```

I get the following error:

What am I doing wrong? Is there a step I'm not following correctly? Codelift looks really useful and I'd love to give it a try!