diff --git a/switch_remote.sh b/switch_remote.sh
index 2f7bb3f..75f7374 100755
--- a/switch_remote.sh
+++ b/switch_remote.sh
@@ -4,11 +4,13 @@ set -euo pipefail
 
 ACTION=$1
 HOST=$2
+CONFIG=$3
 
+set -x
 exec nixos-rebuild $ACTION \
   --use-substitutes \
   --no-build-nix \
   --use-remote-sudo \
-  --build-host "noc@10.20.25.2" \
-  --target-host "noc@10.20.25.2" \
-  --flake ".#$HOST" \
+  --build-host $HOST \
+  --target-host $HOST \
+  --flake ".#${CONFIG}.noc.eh22.intern"
diff --git a/systems/sketchy-router.noc.eh22.intern.nix b/systems/sketchy-router.noc.eh22.intern.nix
index 6e4d490..3617e67 100644
--- a/systems/sketchy-router.noc.eh22.intern.nix
+++ b/systems/sketchy-router.noc.eh22.intern.nix
@@ -29,7 +29,7 @@
 
   networking.nat = {
     enable = true;
-    externalInterface = "ens19";
+    externalInterface = "ens18";
     internalIPs = [ "10.20.25.0/24" ];
   };