From 46e1f71e2d17f02c1378ac42e49a60038ffc79d4 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 6 Dec 2013 12:02:24 +0100
Subject: [PATCH] haskell-defaults.nix: ghc-head builds 'cabal-install' using
 its internal version of Cabal, which is newer or equal to the latest release

---
 pkgs/top-level/haskell-defaults.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 3589be3c6822..19fcb98c82d9 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -19,6 +19,8 @@
     self : self.haskellPlatformArgs_future self // {
       haskellPlatform = null;
       extensibleExceptions = self.extensibleExceptions_0_1_1_4;
+      cabalInstall_1_18_0_2 = self.cabalInstall_1_18_0_2.override { Cabal = null; };
+      cabalInstall = self.cabalInstall_1_18_0_2.override { Cabal = null; };
     };
 
   ghc763Prefs =