dub: Could not resolve configuration for package demo

[mw]

On Friday, 15 March 2024 at 18:04:25 UTC, Inkrementator wrote:
> On Friday, 15 March 2024 at 17:48:26 UTC, mw wrote:
>> ```
>> $ dub build
>> Could not resolve configuration for package demo
>> ```
>
> Trying to build your dependency msgpack-rpc, it spits out
> ```
>      Warning The sub configuration directive "vibe-d" -> 
> [libevent] references a configuration that does not exist.
> Error Could not resolve configuration for package msgpack-rpc
> ```

Thanks for the reply.

But where you see this warning message? I didn't see it even with 
`$ dub build -v`.