std-passthru @ {
  inputs,
  cell,
}: let
  yamlToJsonDrv = pkgs: yamlContent: outputPath: (pkgs.runCommand
    outputPath
    {
      inherit yamlContent;
      nativeBuildInputs = [pkgs.yq];
    }
    # run yq which outputs '.' (no filter) on file at yamlPath
    # note that $out is passed onto the bash/sh script for execution
    ''
      echo "$yamlContent" | yq >$out
    '');

  exec_tests = testUnit: let
    testNames = builtins.attrNames testUnit;
    evaluateTest = testName: assert testUnit."${testName}" == true; testName;
  in
    builtins.concatStringsSep ", " (builtins.foldl' (acc: testName: acc ++ [(evaluateTest testName)]) [] testNames);
  tests = import ./tests.nix std-passthru;
in {
  fromYAML = yamlContent: builtins.fromJSON (builtins.readFile (yamlToJsonDrv inputs.nixpkgs yamlContent "fromYaml.json"));
  ty = import ./ty.nix std-passthru;
  deprecate = import ./mk-deprecate.nix std-passthru;

  inherit tests;
  exec-tests = exec_tests tests;
}