{
  flake.overlays.bulk-transcode = final: prev: {
    bulk-transcode = final.callPackage ./_derivation.nix {};
  };
  perSystem = {pkgs, ...}: {
    packages.bulk-transcode = pkgs.callPackage ./_derivation.nix {};
    devShells.bulk-transcode = import ./_shell.nix {inherit pkgs;};
  };
}