From 1c74ad9f04a03bdf5f2c28caa8e01d9127ba10c5 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sun, 17 Jan 2016 10:50:29 +0100
Subject: [PATCH] haskell-transformers-compat: use latest version when building
 with GHC 8.0.x.

---
 pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
index e4bc4e5d734..cc5034008bb 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
@@ -45,6 +45,9 @@ self: super: {
   # Older versions of QuickCheck don't support our version of Template Haskell.
   QuickCheck = self.QuickCheck_2_8_2;
 
+  # Older versions don't support our version of transformers.
+  transformers-compat = self.transformers-compat_0_5_1_4;
+
   # https://github.com/hspec/HUnit/issues/7
   HUnit = dontCheck super.HUnit;