anchor.diff:      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/helios/SR2/eclipse-modeling-helios-SR2-incubation-linux-gtk-x86_64.tar.gz;
  +          url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/technology/epp/downloads/release/helios/SR2/eclipse-modeling-helios-SR2-incubation-linux-gtk-x86_64.tar.gz;
             sha1 = "e96f5f006298f68476f4a15a2be8589158d5cc61";
           }
         else
           fetchurl {
  -          url = http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/technology/epp/downloads/release/helios/SR2/eclipse-modeling-helios-SR2-incubation-linux-gtk.tar.gz;
  +          url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/technology/epp/downloads/release/helios/SR2/eclipse-modeling-helios-SR2-incubation-linux-gtk.tar.gz;
             sha1 = "696377895bb26445de39d82a916b7e69edb1d939";
           };
     };
  
positive.code:     src =
        if stdenv.system == "x86_64-linux" then
          fetchurl { # tested
            url = http://downloads.typesafe.com/scalaide-pack/4.4.1-vfinal-luna-211-20160504/scala-SDK-4.4.1-vfinal-2.11-linux.gtk.x86_64.tar.gz;
            sha256  = "4c2d1ac68384e12a11a851cf0fc7757aea087eba69329b21d539382a65340d27";
          }
        else
          fetchurl { # untested
            url = http://downloads.typesafe.com/scalaide-pack/4.4.1-vfinal-luna-211-20160504/scala-SDK-4.4.1-vfinal-2.11-linux.gtk.x86.tar.gz;
            sha256 = "35383cb09567187e14a30c15de9fd9aa0eef99e4bbb342396ce3acd11fb5cbac";
          };
    };
  
negative.code:     description = "Eclipse Neon Classic";
      sources = {
        "x86_64-linux" = fetchurl {
            url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.6.1-201609071200/eclipse-SDK-4.6.1-linux-gtk-x86_64.tar.gz;
            sha256 = "1mr7sj4whz23iwz5j6mbqd80a39177qv0r7b6cip7dji4n2agl8j";
          };
        "i686-linux" = fetchurl {
            url = https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops4/R-4.6.1-201609071200/eclipse-SDK-4.6.1-linux-gtk.tar.gz;
            sha256 = "0kgj0zpgzwx90q13c4mr8swf63azd56532ycxgq2rbs0d1qbl87j";
          };
      };
  