From b79ae8c4d5519c9d04349cb9aeb8fff7d2d6d0ab Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 3 Feb 2015 16:36:16 +0100
Subject: [PATCH] contravariant, reflection: fix builds with GHC 7.6.3

---
 pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
index 2a1f47c1a90..14b6aa161de 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.6.x.nix
@@ -63,6 +63,10 @@ self: super: {
   # Choose appropriate flags for our version of 'bytestring'.
   bytestring-builder = disableCabalFlag super.bytestring-builder "bytestring_has_builder";
 
+  # Tagged is not part of base in this environment.
+  contravariant = addBuildDepend super.contravariant self.tagged;
+  reflection = dontHaddock (addBuildDepend super.reflection self.tagged);
+
 } // {
 
   # Not on Hackage.