anchor.diff:  
         def wait_for_ip_${name}(interface):
             property = f"/VirtualBox/GuestInfo/Net/{interface}/V4/IP"
  -          # fmt: off
             getip = f"VBoxManage guestproperty get ${name} {property} | sed -n -e 's/^Value: //p'"
  -          # fmt: on
   
             ip = machine.succeed(
                 ru(
  
positive.code: 
        machine.wait_for_x()
  
        # fmt: off
        ${mkLog "$HOME/.config/VirtualBox/VBoxSVC.log" "HOST-SVC"}
        # fmt: on
  
        ${testScript}
        # (keep black happy)
  
negative.code: 
  
        def create_vm_${name}():
            vbm("createvm --name ${name} ${createFlags}")
            vbm("modifyvm ${name} ${vmFlags}")
            vbm("setextradata ${name} VBoxInternal/PDM/HaltOnReset 1")
            vbm("storagectl ${name} ${controllerFlags}")
            vbm("storageattach ${name} ${diskFlags}")
            vbm("sharedfolder add ${name} ${sharedFlags}")
            vbm("sharedfolder add ${name} ${nixstoreFlags}")
            cleanup_${name}()
  
            ${mkLog "$HOME/VirtualBox VMs/${name}/Logs/VBox.log" "HOST-${name}"}
  
  
        def destroy_vm_${name}():
  