From 36a095e27e58665e98dcbe91b052b770b9c6183c Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 7 Feb 2018 13:07:09 +0100
Subject: [PATCH] haskell-contravariant: fix build on GHC 7.10.x

---
 pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
index fc41fc0b3d30..56f61fddb33e 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
@@ -186,6 +186,7 @@ self: super: {
   attoparsec = addBuildDepends super.attoparsec (with self; [semigroups fail]);
   bytes = addBuildDepend super.bytes self.doctest;
   case-insensitive = addBuildDepend super.case-insensitive self.semigroups;
+  contravariant = addBuildDepend super.contravariant self.semigroups;
   dependent-map = addBuildDepend super.dependent-map self.semigroups;
   distributive = addBuildDepend (dontCheck super.distributive) self.semigroups;
   Glob = addBuildDepends super.Glob (with self; [semigroups]);