anchor.diff:  
   let
   
  -  mirror = https://get.geo.opera.com/pub/opera/desktop;
  -  version = "60.0.3255.170";
  +  mirror = "https://get.geo.opera.com/pub/opera/desktop";
   
  -  rpath = stdenv.lib.makeLibraryPath [
  +  rpath = lib.makeLibraryPath [
   
       # These provide shared libraries loaded when starting. If one is missing,
       # an error is shown in stderr.
  
positive.code:     at-spi2-core
    ];
  
  in stdenv.mkDerivation {
  
    name = "opera-${version}";
  
    src = fetchurl {
      url = "${mirror}/${version}/linux/opera-stable_${version}_amd64.deb";
      sha256 = "04bcy9qhrhps3712k229yn58ak2j93wcp613zd6l2zxb8a286991";
    };
  
    unpackCmd = "${dpkg}/bin/dpkg-deb -x $curSrc .";
  
negative.code: , glib
  , gnome2
  , gtk3
  , lib
  , libX11
  , libxcb
  , libXScrnSaver
  