Failing to fetch WIT for published component

I've published a `calculator` component to `ghcr.io/bytecodealliance/docs/calculator:0.1.0`. Running the following fails to output the wit, rather the output `calculator.wit` file is actually the Wasm component:
```sh
wkg get --format wit docs:calculator@0.1.0 --output calculator.wit --registry ghcr.io
```

Note that a component with no dependencies such as the following one works as expected
```
wkg get --format wit docs:adder@0.1.0 --output adder.wit --registry ghcr.io
```