Can not install GHC-Mod

Question

Hello guys i am trying to install ghc-mod for vscode and i am running into this issue:

**$ stack install ghc-mod**
Populated index cache.

Error: While const         


        

Answer 1

The problem is that ghc-mod does not work on ghc-8.2. The latest Stack resolver that supports ghc-mod seems to be lts-9.21.

ghc-mod has to be compiled with the same version of GHC you are using, so right now that constrains you to 8.0.

Edit (August 2020): ghc-mod has been deprecated in favour of the Haskell IDE Engine (HIE).