anchor.diff:      description = "Eclipse Classic";
       sources = {
         "x86_64-linux" = fetchurl {
  -          url = http://download.eclipse.org/eclipse/downloads/drops4/R-4.4.2-201502041700/eclipse-SDK-4.4.2-linux-gtk-x86_64.tar.gz;
  +          url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.4.2-201502041700/eclipse-SDK-4.4.2-linux-gtk-x86_64.tar.gz;
             sha256 = "0g00alsixfaakmn4khr0m9fxvkrbhbg6qqfa27xr6a9np6gzg98l";
   
           };
         "i686-linux" = fetchurl {
  -          url = http://download.eclipse.org/eclipse/downloads/drops4/R-4.4.2-201502041700/eclipse-SDK-4.4.2-linux-gtk.tar.gz;
  +          url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.4.2-201502041700/eclipse-SDK-4.4.2-linux-gtk.tar.gz;
             sha256 = "1hacyjjwhhxi7r3xyhpqgjqpd5r0irw9bfkalz5s5l6shb0lq4i7";
           };
       };
  
positive.code:     description = "Eclipse Classic";
      sources = {
        "x86_64-linux" = fetchurl {
            url = http://ftp-stud.fht-esslingen.de/pub/Mirrors/eclipse/eclipse/downloads/drops4/R-4.2.2-201302041200/eclipse-SDK-4.2.2-linux-gtk-x86_64.tar.gz;
            sha256 = "0ysa6ymk4h3k1vn59dc909iy197kmx132671kbzfwbim87jmgnqb";
          };
        "i686-linux" = fetchurl {
            url = http://ftp-stud.fht-esslingen.de/pub/Mirrors/eclipse/eclipse/downloads/drops4/R-4.2.2-201302041200/eclipse-SDK-4.2.2-linux-gtk.tar.gz;
            sha256 = "038yibbrcia38wi72qrdl03g7l35mpvl5nxdfdnvpqxrkfffb826";
          };
      };
  
negative.code:     src =
        if stdenv.system == "x86_64-linux" then
          fetchurl {
            url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/technology/epp/downloads/release/indigo/R/eclipse-cpp-indigo-incubation-linux-gtk-x86_64.tar.gz;
            sha256 = "14ppc9g9igzvj1pq7jl01vwhzb66nmzbl9wsdl1sf3xnwa9wnqk3";
          }
        else
          fetchurl {
            url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/technology/epp/downloads/release/indigo/R/eclipse-cpp-indigo-incubation-linux-gtk.tar.gz;
            sha256 = "1cvg1vgyazrkinwzlvlf0dpl197p4784752srqybqylyj5psdi3b";
          };
    };
  