How can I create a JSON object from an associative array in shell using jo?

I know about https://unix.stackexchange.com/questions/625501/how-to-create-json-from-associative-array but that's not my problem. I have this associative array:

declare -A aliases
aliases[Index]=components/Index/Exports
aliases[Shared]=components/Shared/Exports
aliases[Icons]=components/Icons/Exports

Now I need to convert this associative array into this JSON:

{
    "compilerOptions": {
        "baseUrl": ".",
        "paths": {
            "Index": ["components/Index/Exports"],
            "Shared": ["components/Shared/Exports"],
            "Icons": ["components/Icons/Exports"],
        }
    }
}

I want to use jo and jq. But I can't come up with the nesting. I tried this code:

jo -p compilerOptions[baseUrl]=. compilerOptions[paths]="$(jo -p a ${Aliases[@]})"

But it does not even run.