anchor.diff:        }) {};
       ivy = callPackage ({ elpaBuild, emacs, fetchurl, lib }: elpaBuild {
           pname = "ivy";
  -        version = "0.9.1";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/ivy-0.9.1.tar";
  -          sha256 = "1jfc3zf6ln7i8pp5j0fpsai2w847v5g77b5fzlxbgvj80g3v5887";
  +        version = "0.10.0";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/ivy-0.10.0.tar";
  +          sha256 = "01m58inpd8jbfvzqsrwigzjfld9a66nf36cbya26dmdy7vwdm8xm";
           };
           packageRequires = [ emacs ];
           meta = {
  
positive.code:     gnorb = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
      elpaBuild {
          pname = "gnorb";
          version = "1.3.2";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/gnorb-1.3.2.tar";
            sha256 = "054z6bnfkf7qkgc9xynhzy9xrz780x4csj1r206jhslygjrlf1sj";
          };
          packageRequires = [ cl-lib ];
          meta = {
  
negative.code:     el-search = callPackage ({ elpaBuild, emacs, fetchurl, lib, stream }:
      elpaBuild {
          pname = "el-search";
          version = "1.4.0.8";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/el-search-1.4.0.8.tar";
            sha256 = "1gk42n04f1h2vc8sp86gvi795qgnvnh4cyyqfvy6sz1pfix76kfl";
          };
          packageRequires = [ emacs stream ];
          meta = {
  