From d13f7c54e30b5eb9e90f226d2a947f66a0ce1b38 Mon Sep 17 00:00:00 2001
From: Matthew Pickering <matthewtpickering@gmail.com>
Date: Fri, 1 Sep 2017 13:44:00 +0000
Subject: [PATCH] Use older version of jailbreak-cabal with ghcHEAD

See https://github.com/peti/jailbreak-cabal/issues/13
---
 pkgs/development/haskell-modules/configuration-ghc-head.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-head.nix b/pkgs/development/haskell-modules/configuration-ghc-head.nix
index 4b7fc3d8360..7cc32533458 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-head.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-head.nix
@@ -35,7 +35,7 @@ self: super: {
   xhtml = null;
 
   # jailbreak-cabal can use the native Cabal library.
-  jailbreak-cabal = super.jailbreak-cabal.override { Cabal = null; };
+  jailbreak-cabal = pkgs.haskell.packages.ghc802.jailbreak-cabal;
 
   # haddock: No input file(s).
   nats = dontHaddock super.nats;