From 445aa49c716c6373eca8b2395a10a2481718069e Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 11 Sep 2013 10:55:23 +0200
Subject: [PATCH] bison: prefer the tar.gz variant of the sources

Apparently, the bootstrapping stdenv cannot unpack xz-compressed tarfiles.
---
 pkgs/development/tools/parsing/bison/3.x.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/tools/parsing/bison/3.x.nix b/pkgs/development/tools/parsing/bison/3.x.nix
index 9b1499c15375..ffc68a68f5f1 100644
--- a/pkgs/development/tools/parsing/bison/3.x.nix
+++ b/pkgs/development/tools/parsing/bison/3.x.nix
@@ -4,8 +4,8 @@ stdenv.mkDerivation rec {
   name = "bison-3.0";
 
   src = fetchurl {
-    url = "mirror://gnu/bison/${name}.tar.xz";
-    sha256 = "1j14fqgi9wzqgsy4fhkcdrv4hv6rrvhvn84axs520w9b022mbb79";
+    url = "mirror://gnu/bison/${name}.tar.gz";
+    sha256 = "1ll22hcfslyl9n3pgvvphzdp18w9cyic8m0qimfnb8mrs1syrdz5";
   };
 
   nativeBuildInputs = [ m4 ] ++ stdenv.lib.optionals doCheck [perl flex];