From 878965731f9e35580efc21b0d3e79022cfaeb0be Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 6 Feb 2019 20:04:24 -0500
Subject: [PATCH] nixos/lib/testing.nix: config defaults to {}

Fixes #51858

56e12aae54bc67cabe5aa7c8d055438af4f62b5e ends up passing config to pkgs. Unfortunately this might be null and pkgs/top-level/default.nix assumes it is an attrset. To fix this, we just make the default for config = {}. Thanks to @kristoff3r for tracking this down.

/cc @domenkozar
---
 nixos/lib/testing.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index e68563ef48d..a13e76a6956 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -3,7 +3,7 @@
   # Use a minimal kernel?
 , minimal ? false
   # Ignored
-, config ? null
+, config ? {}
   # Modules to add to each VM
 , extraConfigurations ? [] }: