From e0c081c6ac817eac903587eca6dadb2dd6a84276 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 12 Sep 2018 11:55:56 +0200
Subject: [PATCH] haskell-cabal2nix: update override for hpack 0.31.0

* pkgs/development/haskell-modules/configuration-common.nix:
---
 pkgs/development/haskell-modules/configuration-common.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 11772dd7d55..2f89623ecde 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1076,7 +1076,7 @@ self: super: {
 
   # The tool needs a newer hpack version than the one mandated by LTS-12.x.
   cabal2nix = super.cabal2nix.overrideScope (self: super: {
-    hpack = self.hpack_0_30_0;
+    hpack = self.hpack_0_31_0;
     yaml = self.yaml_0_10_1_1;
   });