Editor can't find installed packages

When I install the MessagePack nuget package via Visual Studio 2022 everything seems fine in VS but when I switch to the Flax Editor I get an error message during compile:
error CS0246: The type or namespace name 'MessagePack' could not be found (are you missing a using directive or an assembly reference?)
Any ideas?

Yes maybe you must download the libray, compile dependencies and join all .dlls on project:
HOWTO: Use third-party library | Flax Documentation (flaxengine.com)

It’s weird that I see the dependencies in the Visual Studio project and I can see the DLLs being created in the *project*\Binaries\GameEditorTarget\Windows\x64\Debug folder but Flax Engine/Editor can’t pick them up. Would have been nice if it could have added the references in the generated build script.