From 196e34279d7c2be020bd93712cd4f648423fa293 Mon Sep 17 00:00:00 2001
From: Nikolay Amiantov <ab@fmap.me>
Date: Sat, 4 Apr 2015 16:12:43 +0300
Subject: [PATCH] haskellng.generic-builder: move jailbreak-cabal to postPatch

Closes https://github.com/NixOS/nixpkgs/pull/7208.
---
 pkgs/development/haskell-modules/generic-builder.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index baefedf5a74..15894034819 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -137,10 +137,12 @@ stdenv.mkDerivation ({
   prePatch = optionalString (editedCabalFile != null) ''
     echo "Replace Cabal file with edited version from ${newCabalFileUrl}."
     cp ${newCabalFile} ${pname}.cabal
-  '' + optionalString jailbreak ''
+  '' + prePatch;
+
+  postPatch = optionalString jailbreak ''
     echo "Run jailbreak-cabal to lift version restrictions on build inputs."
     ${jailbreak-cabal}/bin/jailbreak-cabal ${pname}.cabal
-  '' + prePatch;
+  '' + postPatch;
 
   setupCompilerEnvironmentPhase = ''
     runHook preSetupCompilerEnvironment