Helix + metals Scala language server?

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Metals | Metals

https://scalameta.org/metals/

Scala language server with rich IDE features

Metals | Metals

Helix supports 'metals' as a language server for Scala. Metals claims to be easy to install, yet I don't get how to install it for Helix. Anybody managed? I'd prefer to install 'metals' from source.