anchor.diff:        elpaBuild {
           pname = "debbugs";
           ename = "debbugs";
  -        version = "0.33";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/debbugs-0.33.tar";
  -          sha256 = "1s4p3jf9yrm8pn5pljpkrw05n2p9v6fpl141rh1df7f7l0w80qbk";
  +        version = "0.34";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/debbugs-0.34.tar";
  +          sha256 = "06nxia4myhysiw12vsflgllrp9nyhmjnybrrcl1vyf4pw0fc6yrx";
           };
           packageRequires = [ emacs soap-client ];
           meta = {
  
positive.code:           license = lib.licenses.free;
          };
        }) {};
      undo-tree = callPackage ({ elpaBuild, emacs, fetchurl, lib, queue }:
        elpaBuild {
          pname = "undo-tree";
  
negative.code:       elpaBuild {
          pname = "ebdb";
          ename = "ebdb";
          version = "0.8.16";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/ebdb-0.8.16.tar";
            sha256 = "0qldw0a346xbkq289mynvfz38n4yh2rfbvgs5f7ixfc014y3j3gw";
          };
          packageRequires = [ emacs seq ];
          meta = {
  