anchor.diff:          };
         }) {};
       mentor = callPackage ({ async
  -                          , cl-lib ? null
                             , elpaBuild
                             , emacs
                             , fetchurl
  
positive.code:       elpaBuild {
          pname = "annotate";
          ename = "annotate";
          version = "1.7.1";
          src = fetchurl {
            url = "https://elpa.nongnu.org/nongnu/annotate-1.7.1.tar";
            sha256 = "0jyzx5z10mv9b134jz4hkp1mbc9f1ki794cr5na9zwvpd9q3j9iy";
          };
          packageRequires = [];
          meta = {
  
negative.code:       elpaBuild {
          pname = "mentor";
          ename = "mentor";
          version = "0.4";
          src = fetchurl {
            url = "https://elpa.nongnu.org/nongnu/mentor-0.4.tar";
            sha256 = "1n51yabm4npx62fpfn8rhky09x4y779ismdxa026fycy7va7ynzz";
          };
          packageRequires = [ async emacs seq xml-rpc ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/mentor.html";
            license = lib.licenses.free;
  