From f1fc78d99866ecd2fcc6e60c4e01a5aeea5b317b Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Mon, 5 Jan 2015 19:11:20 +0100
Subject: [PATCH] haskell-defaults.nix: down-grade cabal-install to 1.20.x for
 GHC < 7.4.x

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

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 9bd6070a6a17..9e3c8b149d4e 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -86,6 +86,7 @@
   };
 
   ghc722Prefs = self : super : ghc742Prefs self super // {
+    cabalInstall = self.cabalInstall_1_20_0_6;
     caseInsensitive = self.caseInsensitive_1_0_0_1;
     deepseq = self.deepseq_1_3_0_2;
     DrIFT = null;                       # doesn't compile with old GHC versions