anchor.diff:      libnotify
       libuuid
       libxcb
  +    libxshmfence
       mesa
       nspr
       nss
  
positive.code: in stdenv.mkDerivation rec {
  
    pname = "opera";
    version = "68.0.3618.63";
  
    src = fetchurl {
      url = "${mirror}/${version}/linux/${pname}-stable_${version}_amd64.deb";
      sha256 = "1643043ywz94x2yr7xyw7krfq53iwkr8qxlbydzq6zb2zina7jxd";
    };
  
    unpackCmd = "${dpkg}/bin/dpkg-deb -x $curSrc .";
  
negative.code: , libnotify
  , libpulseaudio
  , libuuid
  , libxshmfence
  , mesa
  , nspr
  , nss
  