nix-js/fix/tests/tests/lang/eval-okay-flatten.nix

with import ./lib.nix;

let {

  l = [
    "1"
    "2"
    [
      "3"
      [ "4" ]
      [
        "5"
        "6"
      ]
    ]
    "7"
  ];

  body = concat (flatten l);
}