From b89a65e54cf1742f37db6d24f7c8a7dd1e930be7 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Fri, 16 Mar 2012 03:20:12 +0000
Subject: [PATCH] Allow multiple definitions of boot.loader.kernelFile as long
 as they are all the same

svn path=/nixos/trunk/; revision=33139
---
 modules/system/activation/top-level.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/system/activation/top-level.nix b/modules/system/activation/top-level.nix
index 265f06a5a9d..aa79fb3698d 100644
--- a/modules/system/activation/top-level.nix
+++ b/modules/system/activation/top-level.nix
@@ -38,6 +38,9 @@ let
       description = ''
         Name of the kernel file to be passed to the bootloader.
       '';
+      merge = kernelFiles:
+        builtins.head (map (f: assert f == builtins.head kernelFiles; f)
+          kernelFiles);
     };
 
     system.copySystemConfiguration = pkgs.lib.mkOption {