pkgs: files: let
  test = import ./import.nix;
  res = map test files;
  resFile = builtins.toFile "results" (builtins.toJSON res);
  filter = ''
    .[] | {
      (.path): {
      failures: [.results | map(select(.success==false))[] | {(.msg): {actual, expected}}],
      success: .results | map(select(.success) | .msg) | length
      }
    }
  '';
in (pkgs.writeShellScriptBin "test" ''
  cat '${resFile}' | ${pkgs.jq}/bin/jq '${filter}'
'')