From 55b7802b6138c74f6dd7ac14ab22be9e180480a0 Mon Sep 17 00:00:00 2001
From: Your Name <graham@grahamc.com>
Date: Thu, 19 Aug 2021 16:55:28 -0400
Subject: [PATCH] t/lib/Setup.pm: nix_config: default to empty string

---
 t/lib/Setup.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/lib/Setup.pm b/t/lib/Setup.pm
index 751a81c2..b80eea14 100644
--- a/t/lib/Setup.pm
+++ b/t/lib/Setup.pm
@@ -50,7 +50,7 @@ sub test_init {
     $ENV{'NIX_CONF_DIR'} = "$dir/nix/etc/nix";
     make_path($ENV{'NIX_CONF_DIR'});
     my $nixconf = "$ENV{'NIX_CONF_DIR'}/nix.conf";
-    my $nix_config = "sandbox = false\n" . $opts{'nix_config'};
+    my $nix_config = "sandbox = false\n" . ($opts{'nix_config'} || "");
     write_file($nixconf, $nix_config);
     $ENV{'HYDRA_CONFIG'} = "$dir/hydra.conf";