From d30e9082bb7a57baefa7f8f192b7b50f67e5066f Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Mon, 12 Jan 2015 12:20:42 -0500
Subject: [PATCH] D'oh

---
 pkgs/development/haskell-modules/lib.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/haskell-modules/lib.nix b/pkgs/development/haskell-modules/lib.nix
index 99ae61ee975..68750fbb135 100644
--- a/pkgs/development/haskell-modules/lib.nix
+++ b/pkgs/development/haskell-modules/lib.nix
@@ -2,10 +2,11 @@
 
 rec {
 
-  overrideCabal = drv: f: drv.override (args: args // {
+  overrideCabal = drv: f: (drv.override (args: args // {
     mkDerivation = drv: args.mkDerivation (drv // f drv);
+  })) // {
     overrideScope = scope: overrideCabal (drv.overrideScope scope) f;
-  });
+  };
 
   doHaddock = drv: overrideCabal drv (drv: { noHaddock = false; });
   dontHaddock = drv: overrideCabal drv (drv: { noHaddock = true; });