nix/os/devices/vmd32387.contaboserver.net/system.nix

@@ -77,6 +77,10 @@ in {
     };
   };
 
+  nix.gc = {
+    automatic = true;
+  };
+
   boot.initrd.network = {
     enable = true;
     udhcpc.extraArgs = [ "-x hostname:${config.networking.hostName}" ];