From a4ce475b61b4c7fb611cbcf6480ce4f03690220c Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 29 Mar 2017 16:11:38 +0200
Subject: [PATCH] haskell-void: fix build with GHC 7.8.x

---
 pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
index f63d31c9efd..1a151efcf38 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
@@ -148,6 +148,7 @@ self: super: {
   lens = addBuildDepends super.lens (with self; [doctest generic-deriving nats simple-reflect]);
   distributive = addBuildDepend super.distributive self.semigroups;
   QuickCheck = addBuildDepends super.QuickCheck (with self; [nats semigroups]);
+  void = addBuildDepends super.void (with self; [hashable semigroups]);
 
   # Haddock doesn't cope with the new markup.
   bifunctors = dontHaddock super.bifunctors;