diff --git a/flake.nix b/flake.nix
index 61f95b8..73f011a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -46,7 +46,7 @@
               # run nixos-rebuild switch on the target system
               # the config will be built locally and copied over
               "${name}-update" = nixpkgs.legacyPackages.x86_64-linux.writeShellScriptBin "update" ''
-                nixos-rebuild switch --flake .#${name} --target-host root@${name}.test.htw.stura-dresden.de
+                nixos-rebuild switch --flake .#${name} --target-host root@${(builtins.head (nixosConfigurations.${name}.config.networking.interfaces.${builtins.head (builtins.attrNames nixosConfigurations.${name}.config.networking.interfaces)}.ipv4.addresses)).address}
               '';
 
               # copy install image to testserver and deploy the specified configuration to it