From 846906fc53e5cf1b4d6a893bfbfcc6abf6028451 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Fri, 11 Apr 2014 11:09:59 +0200
Subject: [PATCH] ipsec-tools: fix build by passing old version of flex

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

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 467d092eab9..8fe3d87190a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1679,7 +1679,7 @@ let
            { hurd = gnu.hurdCrossIntermediate; })
     else null;
 
-  ipsecTools = callPackage ../os-specific/linux/ipsec-tools { };
+  ipsecTools = callPackage ../os-specific/linux/ipsec-tools { flex = flex_2_5_35; };
 
   patch = gnupatch;