From eca445a408e9233ef3bddeefb066eb4eab30c167 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 3 May 2014 11:18:17 +0200
Subject: [PATCH] Bootstrap ghc-head with GHC 7.6.3 to see if that solves our
 weird compiler errors:

  compiler/simplCore/CoreMonad.lhs:835:10:
      Non type-variable argument in the constraint: MonadPlus IO
      (Use -XFlexibleContexts to permit this)
      In the context: (MonadPlus IO)
      While checking an instance declaration
      In the instance declaration for `A.Alternative CoreM'

  compiler/simplCore/CoreMonad.lhs:841:10:
      Non type-variable argument in the constraint: MonadPlus IO
      (Use -XFlexibleContexts to permit this)
      In the context: (MonadPlus IO)
      While checking an instance declaration
      In the instance declaration for `MonadPlus CoreM'
---
 pkgs/top-level/haskell-defaults.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 5a84b4339e2..f9b9560bf14 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -413,7 +413,7 @@
   # Reasonably current HEAD snapshot. Should *always* be lowPrio.
   packages_ghcHEAD =
     packages { ghcPath = ../development/compilers/ghc/head.nix;
-               ghcBinary = ghc742Binary;
+               ghcBinary = pkgs.haskellPackages.ghcPlain;
                prefFun = ghcHEADPrefs;
                extraArgs = {
                  happy = pkgs.haskellPackages.happy_1_19_2;