anchor.diff:          ''
         else
           test // {
  -          inherit nodes driver test;
  +          inherit nodes test;
  +          driver = driver testDriverInteractive;
           };
   
     runInMachine =
  
positive.code:         meta = (drv.meta or {}) // t.meta;
        };
  
        test = passMeta (runTests driver);
  
        nodeNames = builtins.attrNames nodes;
        invalidNodeNames = lib.filter
  
negative.code:         # TODO: copy user script part into this file (append)
  
          wrapProgram $out/bin/nixos-test-driver \
            --prefix PATH : "${lib.makeBinPath [ qemu_pkg vde2 netpbm coreutils ]}" \
        '';
    };
  
    testDriver = mkTestDriver qemu_test;
    testDriverInteractive = mkTestDriver qemu_kvm;
  
    # Run an automated test suite in the given virtual network.
    # `driver' is the script that runs the network.
  