From e6e56bbe32099663b6f78db60c95abecd2fec927 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Mon, 3 Sep 2018 09:33:37 -0400
Subject: [PATCH] ghc: Apply fix to abi-hash with backpack.

See https://phabricator.haskell.org/D5123.
---
 pkgs/development/compilers/ghc/8.4.3.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/compilers/ghc/8.4.3.nix b/pkgs/development/compilers/ghc/8.4.3.nix
index aa9fab18436..365f401119d 100644
--- a/pkgs/development/compilers/ghc/8.4.3.nix
+++ b/pkgs/development/compilers/ghc/8.4.3.nix
@@ -99,6 +99,10 @@ stdenv.mkDerivation (rec {
     sha256 = "0plzsbfaq6vb1023lsarrjglwgr9chld4q3m99rcfzx0yx5mibp3";
     extraPrefix = "utils/hsc2hs/";
     stripLen = 1;
+  }) (fetchpatch rec { # https://phabricator.haskell.org/D5123
+    url = "http://tarballs.nixos.org/sha256/${sha256}";
+    name = "D5123.diff";
+    sha256 = "0nhqwdamf2y4gbwqxcgjxs0kqx23w9gv5kj0zv6450dq19rji82n";
   })] ++ stdenv.lib.optional deterministicProfiling
     (fetchpatch rec {
       url = "http://tarballs.nixos.org/sha256/${sha256}";