From 73e221992717a95777710a841134f43781240bba Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 17 Jan 2017 11:23:38 +0100
Subject: [PATCH] stack: pin build to old version of hpack

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

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 7c94211d566..191f19bb312 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1011,6 +1011,7 @@ self: super: {
     optparse-applicative = dontCheck self.optparse-applicative_0_13_0_0;
     criterion = super.criterion.override { inherit (super) optparse-applicative; };
     aeson = self.aeson_1_0_2_1;
+    hpack = self.hpack_0_15_0;
   });
 
   # The latest Hoogle needs versions not yet in LTS Haskell 7.x.