anchor.diff:      if stdenv.system == "i686-linux" then
         fetchurl {
           url = "${mirror}/${version}/linux/opera-stable_${version}_i386.deb";
  -        sha256 = "0qjkhadlpn5c20wm66hm7rn12kdk4bh2plfgpfkzp85jmsjdxri5";
  +        sha256 = "1zdhg6lrnpn8f4rdibnagj3ps3i8s9ygm4dpj5h605rqk24xxpvs";
         }
       else if stdenv.system == "x86_64-linux" then
         fetchurl {
           url = "${mirror}/${version}/linux/opera-stable_${version}_amd64.deb";
  -        sha256 = "1f3slbydxkk15banjbm7d8602l3vxy834ijsdqpyj0ckc5mw0g9y";
  +        sha256 = "04yklvxprl7kcnl43fmvk1qfj5ifvivj715n26ylzcf29pvcy1mp";
         }
       else throw "Opera is not supported on ${stdenv.system} (only i686-linux and x86_64 linux are supported)";
   
  
positive.code: , gnome2
  , gtk2
  , libX11
  , libXScrnSaver
  , libXcomposite
  , libXcursor
  
negative.code:     libXrandr.out
      libXrender.out
      libXtst.out
      libxcb.out
      libnotify.out
      nspr.out
      nss.out
  