anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "mullvad-vpn";
  -  version = "2020.7";
  +  version = "2021.1";
   
     src = fetchurl {
       url = "https://www.mullvad.net/media/app/MullvadVPN-${version}_amd64.deb";
  -    sha256 = "07vryz1nq8r4m5y9ry0d0v62ykz1cnnsv628x34yvwiyazbav4ri";
  +    sha256 = "1ksa327zaiwmcmzv4n4ycfzc4sqhj2492c5ir0mqlx7x2nnhx6q7";
     };
   
     nativeBuildInputs = [
  
positive.code:     homepage = "https://github.com/mullvad/mullvadvpn-app";
      description = "Client for Mullvad VPN";
      changelog = "https://github.com/mullvad/mullvadvpn-app/blob/${version}/CHANGELOG.md";
      license = licenses.gpl3;
      platforms = [ "x86_64-linux" ];
      maintainers = with maintainers; [ Br1ght0ne ];
    };
  
  }
  
negative.code: { stdenv, lib, fetchurl, dpkg
  , alsaLib, atk, cairo, cups, dbus, expat, fontconfig, freetype
  , gdk-pixbuf, glib, gnome2, pango, nspr, nss, gtk3
  , xorg, autoPatchelfHook, systemd, libnotify, libappindicator
  