From 0114a972c7411edb90af2ecc7a240386ca6834a6 Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Wed, 9 Jul 2014 17:51:20 -0500
Subject: [PATCH] haskell-ghc-mod: Correct patch to ghc-process.el

This change has been accepted upstream, so soon it will not be necessary.
---
 pkgs/development/libraries/haskell/ghc-mod/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/haskell/ghc-mod/default.nix b/pkgs/development/libraries/haskell/ghc-mod/default.nix
index ee2cbdbd203..2385cb201d3 100644
--- a/pkgs/development/libraries/haskell/ghc-mod/default.nix
+++ b/pkgs/development/libraries/haskell/ghc-mod/default.nix
@@ -21,7 +21,7 @@ cabal.mkDerivation (self: {
   configureFlags = "--datasubdir=${self.pname}-${self.version}";
   postInstall = ''
     cd $out/share/$pname-$version
-    sed -i -e 's/"-b" "\\n" "-l"/"-l" "-b" "\\"\\\\n\\""/' ghc-process.el
+    sed -i -e 's/"-b" "\\n" "-l"/"-l" "-b" "\\"\\n\\""/' ghc-process.el
     make
     rm Makefile
     cd ..