diff --git a/flake.lock b/flake.lock
index 37b92965..e03377de 100644
--- a/flake.lock
+++ b/flake.lock
@@ -57,11 +57,11 @@
     },
     "secrets": {
       "locked": {
-        "lastModified": 1615474462,
-        "narHash": "sha256-fuRO3+iHXzU8Gqjui+BO2Abx9PttTrXh7XtHAkMX6aA=",
+        "lastModified": 1615491959,
+        "narHash": "sha256-3BTava53q8SM3UrVfMjrXRO1n197zQRPQG7dNMf7CNo=",
         "ref": "master",
-        "rev": "7047060f6a79ec6a4c1b2046ba476512aad63667",
-        "revCount": 89,
+        "rev": "bb275614a98930cc20a49685bb46acee4344fdc7",
+        "revCount": 90,
         "type": "git",
         "url": "ssh://git@gitea.c3d2.de:2222/c3d2-admins/secrets.git"
       },
diff --git a/hosts/containers/dn42/default.nix b/hosts/containers/dn42/default.nix
index 12c2a777..375d67db 100644
--- a/hosts/containers/dn42/default.nix
+++ b/hosts/containers/dn42/default.nix
@@ -84,7 +84,7 @@ in {
       allowedIPsAsRoutes = false;
       postSetup = ''
         ${pkgs.iproute}/bin/ip addr del ${address4}/32 dev ${name}
-        ${pkgs.iproute}/bin/ip addr add ${address4} dev ${name} peer ${conf.address4}/32
+        ${pkgs.iproute}/bin/ip addr add ${address4} dev ${name}${if conf ? address4 then " peer ${conf.address4}/32" else ""}
       '';
       peers = [
         ({