anchor.diff:  , glib
   , gnome2
   , gtk3
  +, gtk4
   , lib
   , libX11
   , libxcb
  
positive.code: in stdenv.mkDerivation rec {
  
    pname = "opera";
    version = "76.0.4017.94";
  
    src = fetchurl {
      url = "${mirror}/${version}/linux/${pname}-stable_${version}_amd64.deb";
      sha256 = "sha256-vjSfzkl1jIQ9P1ARDa0eOuD8CmKHIEZ+IwMB2wIVjE8=";
    };
  
    unpackCmd = "${dpkg}/bin/dpkg-deb -x $curSrc .";
  
negative.code:     # brings up the crash report, which also crashes. `strace -f` hints at a
      # missing libudev.so.0.
      (lib.getLib systemd)
  
      # Error at startup:
      # "Illegal instruction (core dumped)"
      gtk3
      gtk4
    ];
  
    installPhase = ''
      mkdir -p $out
      cp -r . $out/
    '';
  
    meta = with lib; {
  