Haskell/stack on Windows in non-standard location

Often today we need to install Haskell on Windows in not-default location - due to SSD disks, for example, in D:\somewhere instead of standard C:\. This tutorial shows how to do it.

Install stack

First, we need to install stack in non-typical location. Create directory D:\stackroot - all stack caches will be located there. Then add to environment variable binding STACK_ROOT=D:\stackroot. Install stack also on the same disk, for example, D:\apps\stack (or put in there if use download binary).

Now install the compiler as usual. After installation you will call stack with --system-ghc. Another (and right!) solution is to add next setting in D:\stackroot\config.yaml:

local-bin-path: D:\apps\haskell\8.0.2\bin
system-ghc: true

I suppose you installed compiler in D:\apps\haskell (and it has version 8.0.2). If not, change value to your path.

Also you should add to environment variable PATH next path: d:\apps\haskell\8.0.2\msys\usr\bin.

Now you can use stack to install other packages even which needs ./configure script run.

To check what paths uses stack, run stack path.

Integration with Spacemacs

Install with stack packages:

• apply-refact
• hlint
• stylish-haskell
• hasktags
• hoogle (for local queries)
• ghc-mod
• intero (optional, because intero-layer install it byself)
• hindent

In Spacemacs you should to add Haskell layer. To see types hints you must run Haskell REPL (SPC m h s b IMHO:). Also you must add syntax-checking layer, auto-completion. And sure, path to stack must be in PATH environment variable :)