From 0c1198cf08576f16633b2344dc6513cefb567cfc Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Fri, 20 Dec 2013 13:11:41 +0100
Subject: nix-shell: Set $IN_NIX_SHELL before evaluation

This has some hacky applications.
---
 scripts/nix-build.in | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/nix-build.in b/scripts/nix-build.in
index b3f12b706..60e8afec8 100755
--- a/scripts/nix-build.in
+++ b/scripts/nix-build.in
@@ -175,6 +175,8 @@ foreach my $expr (@exprs) {
         $drvPath = readlink $drvPath or die "cannot read symlink `$drvPath'" if -l $drvPath;
         my $drv = derivationFromPath($drvPath);
 
+        $ENV{'IN_NIX_SHELL'} = 1;
+
         # Build or fetch all dependencies of the derivation.
         my @inputDrvs = grep { my $x = $_; (grep { $x =~ $_ } @envExclude) == 0 } @{$drv->{inputDrvs}};
         system("$Nix::Config::binDir/nix-store", "-r", "--no-output", @buildArgs, @inputDrvs, @{$drv->{inputSrcs}}) == 0
@@ -193,8 +195,6 @@ foreach my $expr (@exprs) {
         $ENV{'NIX_STORE'} = $Nix::Config::storeDir;
         $ENV{$_} = $drv->{env}->{$_} foreach keys %{$drv->{env}};
 
-        $ENV{'IN_NIX_SHELL'} = 1;
-
         # Run a shell using the derivation's environment.  For
         # convenience, source $stdenv/setup to setup additional
         # environment variables and shell functions.  Also don't lose
-- 
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