anchor.diff:    # 1. basic example
     bash = buildImage {
       name = "bash";
  +    tag = "latest";
       contents = pkgs.bashInteractive;
     };
   
  
positive.code:   # See issue #34779 and PR #40947 for details.
    runAsRootExtraCommands = pkgs.dockerTools.buildImage {
      name = "runAsRootExtraCommands";
      contents = [ pkgs.coreutils ];
      # The parens here are to create problematic bash to embed and eval. In case
      # this is *embedded* into the script (with nix expansion) the initial quotes
  
negative.code:   # dockerTools chain.
    onTopOfPulledImage = buildImage {
      name = "onTopOfPulledImage";
      tag = "latest";
      fromImage = nixFromDockerHub;
      contents = [ pkgs.hello ];
    };
  