λ>_

Setting up Haskell on Windows

15 April 2015

Why do that and not use Haskell Platform instead?

From what I have experienced so far, Haskell Platform falls behind the latest GHC release, and ships with Packages that one might not need.

Essentially there are two things needed:

GHC

Cabal

In the beggining I was wondering what a MSYS-compatible shell is, but it turns out the shell offered by Git Bash will do fine.

I was also wondering what's the difference between Cygwin and MinGW and came across this great Q&A on Stack Overflow.

Did it work out?

Open a command prompt (cmd.exe) window or a Git Bash window and execute where cabal, which should print the path where cabal executable resides:

C:\Users\[YOUR USERNAME]\AppData\Roaming\cabal\bin\cabal.exe

In the same command prompt executing ghci should launch GHCi (Haskell’s interactive environment):

GHCi, version 7.8.4: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
>

To get the > character show up in the prompt, add the following to C:\Users\[YOUR USERNAME]\AppData\Roaming\ghc\ghci.conf:

:set prompt "> "

That’s it – Happy Haskell Programming!