anchor.diff:        }) {};
       auctex = callPackage ({ elpaBuild, fetchurl, lib }: elpaBuild {
           pname = "auctex";
  -        version = "11.89.8";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/auctex-11.89.8.tar";
  -          sha256 = "0rilldzb7sm7k22vfifdsnxz1an94jnn1bn8gfmqkac4g9cskl46";
  +        version = "11.90.0";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/auctex-11.90.0.tar";
  +          sha256 = "04nsndwcf0dimgc2p1yzzrymc36amzdnjg0158nxplmjkzdp28gy";
           };
           packageRequires = [];
           meta = {
  
positive.code:     ztree = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
      elpaBuild {
          pname = "ztree";
          version = "1.0.4";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/ztree-1.0.4.tar";
            sha256 = "0xiiaa660s8z7901siwvmqkqz30agfzsy3zcyry2r017m3ghqjph";
          };
          packageRequires = [ cl-lib ];
          meta = {
  
negative.code:       }) {};
      cl-lib = callPackage ({ elpaBuild, fetchurl, lib }: elpaBuild {
          pname = "cl-lib";
          version = "0.6.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/cl-lib-0.6.1.el";
            sha256 = "00w7bw6wkig13pngijh7ns45s1jn5kkbbjaqznsdh6jk5x089j9y";
          };
          packageRequires = [];
          meta = {
  