defaultDbSettings slow to build in release mode

Changing this line:

```haskell
folq :: DatabaseSettings be Folq
folq = defaultDbSettings
```

to

```haskell
folq :: DatabaseSettings be Folq
folq = undefined
```

saves about 40 seconds of build time on my machine. Here `Folq` is a database with around 20 tables. If I build without optimisation (by passing `--fast` to Stack) it only saves about a second, which I can live with.

Is there any way to speed this up?

Cheers!