Revert "nix-shell: Set $IN_NIX_SHELL before evaluation"

This reverts commit 0c1198cf08576f16633b2344dc6513cefb567cfc.

1 files changed, 2 insertions, 2 deletions

diff --git a/scripts/nix-build.in b/scripts/nix-build.in
index 8b66e38a9aff..8e6f43a373a1 100755
--- a/scripts/nix-build.in
+++ b/scripts/nix-build.in
@@ -175,8 +175,6 @@ 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("$Nix::Config::binDir/nix-store", "-r", "--no-output", "--no-gc-warning", @buildArgs, @inputDrvs, @{$drv->{inputSrcs}}) == 0
@@ -195,6 +193,8 @@ 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