nixpkgs/pkgs/applications/networking/browsers/ungoogled-chromium/ungoogled-src.nix

{
  "81.0.4044.138" = {
    rev = "81.0.4044.138-1";
    sha256 = "1qa5lw2psaqxr2zklaldx4sm6by4gsw3mfrp01ijc4kkp9jmvg7r";
  };
}