From 4f50600ae02864214394edb271617feaddc62439 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Mon, 5 Jan 2015 14:36:02 +0100
Subject: [PATCH] haskell-defaults.nix: build Cabal 1.22.x with binary 0.7.x on
 GHC versions < 7.8.x

https://github.com/haskell/cabal/issues/2322
---
 pkgs/top-level/haskell-defaults.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 791be4e0fbc..dda615e1f1d 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -40,6 +40,9 @@
   };
 
   ghc763Prefs = self : super : ghc784Prefs self super // {
+    Cabal_1_22_0_0 = super.Cabal_1_22_0_0.override {
+      binary = self.binary_0_7_2_2.override { cabal = self.cabal.override { extension = self: super: { doCheck = false; }; }; };
+    };
     aeson = self.aeson_0_7_0_4;
     ariadne = super.ariadne.override {
       haskellNames = self.haskellNames.override {