haskell-language-server: doc-on-hover for 3rd party library definitions

[seagreen]

For folks who are using haskell-language-server, are you getting doc-on-hover for 3rd party library definitions? Eg:

Due to this bug they only work for me if the -haddock GHC flag was passed to each of the dependencies. I have the following $everything added to Unison's stack.yaml to get them working locally:

ghc-options:
 # All packages
 "$locals": -Werror -Wno-type-defaults #-freverse-errors
 "$everything": -haddock

Should we add that to this repo's stack.yaml?

Note that it might slow down compilation slightly, compiling local packages went from 109s to 111s with it.

Also @mitchellwrosen any chance you've run into this?