Runtime-dependency on cabal executable?

I got this:

```
Ensuring cabal version is >= 2 ...
stack2nix: ERROR: cabal version must be 2 or higher. Current version: 1.22.6.0
CallStack (from HasCallStack):
error, called at src/Stack2nix/Util.hs:47:49 in stack2nix-0.1.3.1-3EqQ1tT1vMJGpAYSWfmhUQ:Stack2nix.Util
```

I see it calls `cabal --version`. Why is that?

`stack2nix` already link in the `Cabal` library, so couldn't it use only functionality from that? Then it wouldn't care about whatever `cabal` is in path (or even require it to be installed).