diff --git a/krebs/2configs/default.nix b/krebs/2configs/default.nix
index 5d64555c8..6ca7c732a 100644
--- a/krebs/2configs/default.nix
+++ b/krebs/2configs/default.nix
@@ -28,7 +28,7 @@ with import ../../lib/pure.nix { inherit lib; };
   networking.hostName = config.krebs.build.host.name;
 
   nix.maxJobs = 1;
-  nix.useSandbox = true;
+  nix.settings.sandbox = true;
 
   environment.systemPackages = with pkgs; [
     git