From 72141a630bc27660a858dc8b80b7c48818365ec7 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 26 Jan 2018 14:40:46 +0100
Subject: [PATCH] ghc-8.4.1: un-revert "update to 8.4.1-alpha2"

This commit undoes the revert from a74b0e717d9156c61264e15a1e7fed680a5e4b31.
See https://github.com/NixOS/nixpkgs/issues/34229 and
https://github.com/NixOS/nixpkgs/pull/34232 for further details about why this
build seemed broken.
---
 pkgs/development/compilers/ghc/8.4.1.nix | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/compilers/ghc/8.4.1.nix b/pkgs/development/compilers/ghc/8.4.1.nix
index 88bcc3e148b..17dc24e567f 100644
--- a/pkgs/development/compilers/ghc/8.4.1.nix
+++ b/pkgs/development/compilers/ghc/8.4.1.nix
@@ -24,7 +24,7 @@
   # platform). Static libs are always built.
   enableShared ? true
 
-, version ? "8.4.20180115"
+, version ? "8.4.20180122"
 }:
 
 assert !enableIntegerSimple -> gmp != null;
@@ -73,8 +73,8 @@ stdenv.mkDerivation rec {
 
   src = fetchgit {
     url = "git://git.haskell.org/ghc.git";
-    rev = "3e3a096885c0fcd0703edbeffb4e47f5cbd8f4cc";
-    sha256 = "06slymbsd7vsfp4hh40v7cxf7nmp0kvlni2wfq7ag5wlqh04slgs";
+    rev = "61db0b8941cfb7ed8941ed29bdb04bd8ef3b71a5";
+    sha256 = "15sbpgkal4854jc1xn3sprvpnxwdj0fyy43y5am0h9vja3pjhjyi";
   };
 
   enableParallelBuilding = true;