nixos/tests/unifi: inherit allowUnfree into test node

mongodb is unfree, so the test won't run without this. we already allow
unfree to grab the unifi packages, so it's not even a big change.

1 files changed, 2 insertions, 0 deletions

diff --git a/nixos/tests/unifi.nix b/nixos/tests/unifi.nix
index 9dc7e5d04bd5d..d371bafd69652 100644
--- a/nixos/tests/unifi.nix
+++ b/nixos/tests/unifi.nix
@@ -16,6 +16,8 @@ let
     };
 
     nodes.server = {
+      nixpkgs.config = config;
+
       services.unifi = {
         enable = true;
         unifiPackage = unifi;