How to tell Mason where to find a LS?

[eric-hansen]

I use Docker for local dev, so I have composer install things through Docker and a mounted volume.

Because of this, I don't have composer on my host nor do I want to.

I found this which seems to be the entrypoint of running composer: https://github.com/williamboman/mason.nvim/blob/main/lua/mason-core/spawn.lua

is there a way to specify a custom runner for composer? I've tried creating an alias to see as well and that didn't matter either.