diff --git a/krebs/4lib/types.nix b/krebs/4lib/types.nix
index 4e123e723..f6b4bd8b1 100644
--- a/krebs/4lib/types.nix
+++ b/krebs/4lib/types.nix
@@ -67,7 +67,7 @@ types // rec {
           options = {
             config = mkOption {
               type = str;
-              apply = _: ''
+              default = ''
                 ${optionalString (net-config.via != null)
                   (concatMapStringsSep "\n" (a: "Address = ${a}") net-config.via.addrs)}
                 ${concatMapStringsSep "\n" (a: "Subnet = ${a}") net-config.addrs}