From 1ab6957c69cf114d5180899039a3239526cb2bb8 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 18 Sep 2012 11:08:45 -0400
Subject: [PATCH] Remove duplicate attribute

---
 pkgs/top-level/all-packages.nix | 2 --
 1 file changed, 2 deletions(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index eee8d221dc60..b821e3a6ee5d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2959,8 +2959,6 @@ let
 
   bison26 = callPackage ../development/tools/parsing/bison/bison-2.6.nix { };
 
-  bison26 = callPackage ../development/tools/parsing/bison/bison-2.6.nix { };
-
   buildbot = callPackage ../development/tools/build-managers/buildbot {
     inherit (pythonPackages) twisted;
   };