anchor.diff:        }) {};
       org = callPackage ({ elpaBuild, fetchurl, lib }: elpaBuild {
           pname = "org";
  -        version = "20170717";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/org-20170717.tar";
  -          sha256 = "0jrkfclwlbfcdkf56awnmvyw5vb9qwbfyyf2z4ilwx29zps9mxnh";
  +        version = "20170724";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/org-20170724.tar";
  +          sha256 = "1f1szds6642427hrzagxgkr05z66sf57n5l2acvmpgw4z358ms0n";
           };
           packageRequires = [];
           meta = {
  
positive.code:     hydra = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
      elpaBuild {
          pname = "hydra";
          version = "0.13.5";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/hydra-0.13.5.tar";
            sha256 = "0vq1pjyq6ddbikbh0vzdigbs0zlldgwad0192s7v9npg8qlwi668";
          };
          packageRequires = [ cl-lib ];
          meta = {
  
negative.code:     yasnippet = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
      elpaBuild {
          pname = "yasnippet";
          version = "0.12.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/yasnippet-0.12.1.tar";
            sha256 = "01q1hn3w8w63s7cvr9bq6l5n4nyirnk8qfba60ajp3j6ndi2964n";
          };
          packageRequires = [ cl-lib ];
          meta = {
  