From 2a0a12f333dc7a276c3cd47a2a6825da8bc8d4a0 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 5 Apr 2014 00:58:14 +0200
Subject: [PATCH] Upgrade hashable to version 1.2.x.

This change in the GHC 7.6.3 profile violates Haskell Platform, but it fixes
many builds that would not succeed otherwise (such as Trifecta). Overriding
hashable locally in an expression is out of question: the package is used
virtually everywhere.
---
 .../libraries/haskell/haskell-platform/2013.2.0.0.nix           | 1 +
 pkgs/top-level/haskell-packages.nix                             | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix b/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix
index 2e0181bd1a7..f209c39d438 100644
--- a/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix
+++ b/pkgs/development/libraries/haskell/haskell-platform/2013.2.0.0.nix
@@ -30,6 +30,7 @@ cabal.mkDerivation (self : {
     cp ${self.cabalFile} $sourceRoot/${self.pname}.cabal
     cp ${self.setupFile} $sourceRoot/Setup.hs
     touch $sourceRoot/LICENSE
+    sed -i -e 's|hashable  *==1.1.2.5,|hashable,|' $sourceRoot/${self.pname}.cabal
   '';
   noHaddock = true;
   meta = {
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 08757faf4c8..01462724e03 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -190,7 +190,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     GLUT         = self.GLUT_2_4_0_0;
     GLURaw       = self.GLURaw_1_3_0_0;
     haskellSrc   = self.haskellSrc_1_0_1_5;
-    hashable     = self.hashable_1_1_2_5;
+    hashable     = self.hashable_1_2_1_0;       # not HP (1.1.2.5), but fixes many builds
     html         = self.html_1_0_1_2;
     HTTP         = self.HTTP_4000_2_8;
     HUnit        = self.HUnit_1_2_5_2;