help needed configuring GHC API client

[Norman Ramsey]

 > Hi Norman,
 > 
 > I think you are overcomplicating things quite a bit.
 > 
 > 1. Build a HEAD (9.3) compiler
 > 2. Setup a normal cabal project to depend on the `ghc` library
 > 3. Use the cabal -w option to point to your HEAD compiler to build the
 > project (`cabal build -w /path/to/head`)
 > 
 > That will work reliably rather than messing around with package databases.

My understanding is that if I do things this way, I give up the
Haskell Language Server.  I am in the middle of learning a large,
unfamiliar API, and the HLS is a lifeline to the documentation.
Am I wrong?  Is there another fast path to the documentation?


Norman