anchor.diff:              cd /out
   
               trap '${systemd}/bin/systemctl poweroff --force --force' EXIT
  -
  -            export out="$(cat /__out)"
  -            rm /__out
   
               (
                 set -e
  
positive.code:         );
          serviceConfig = {
            Type = "oneshot";
            ExecStart = "${writeScriptBin "test-script" ''
              #!${stdenv.shell}
  
  
negative.code:   config = {
      nixos-multi-spawn = {
        inherit (cfg) tailFiles;
        machines = mapAttrs (name: host: {
          environment.IP = "${ipMap.${name}}/16";
          inheritEnvVars = [ "out" ];
  