From 511455965e1a17db3653147a4ac0d284a37915be Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 31 Jul 2013 13:17:50 +0200
Subject: [PATCH] nix-shell: Don't disable Automake dependency tracking

Nixpkgs' stdenv disables dependency tracking by default.  That makes
sense for one-time builds, but in an interactive environment we expect
repeated "make" invocations to do the right thing.
---
 scripts/nix-build.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/nix-build.in b/scripts/nix-build.in
index b3a0f400f..73c92c9a7 100755
--- a/scripts/nix-build.in
+++ b/scripts/nix-build.in
@@ -198,7 +198,8 @@ foreach my $expr (@exprs) {
         writeFile(
             $rcfile,
             '[ -e ~/.bashrc ] && source ~/.bashrc; ' .
-            ($pure ? '' : 'p=$PATH; ' ).
+            ($pure ? '' : 'p=$PATH; ' ) .
+            'dontAddDisableDepTrack=1; ' .
             '[ -e $stdenv/setup ] && source $stdenv/setup; ' .
             ($pure ? '' : 'PATH=$PATH:$p; ') .
             'set +e; ' .