From 4d2a82ab85a182f5c9d9afcce70cc070b696cc40 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 26 May 2010 20:39:53 +0000
Subject: [PATCH] GNU Mach: Fix full build.

svn path=/nixpkgs/trunk/; revision=21994
---
 pkgs/os-specific/gnu/mach/default.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/gnu/mach/default.nix b/pkgs/os-specific/gnu/mach/default.nix
index 7949f5e8e45..95b3921ee2b 100644
--- a/pkgs/os-specific/gnu/mach/default.nix
+++ b/pkgs/os-specific/gnu/mach/default.nix
@@ -16,7 +16,12 @@ stdenv.mkDerivation ({
     inherit rev;
   };
 
-  configureFlags = "--build=i586-pc-gnu";
+  configureFlags =
+       stdenv.lib.optional headersOnly "--build=i586-pc-gnu"  # cheat
+
+    # Always enable dependency tracking.  See
+    # <http://lists.gnu.org/archive/html/bug-hurd/2010-05/msg00137.html>.
+    ++ [ "--enable-dependency-tracking" ];
 
   buildNativeInputs = [ autoconf automake texinfo ]
     ++ stdenv.lib.optional (mig != null) mig;