anchor.diff:        elpaBuild {
           pname = "undo-tree";
           ename = "undo-tree";
  -        version = "0.7.2";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/undo-tree-0.7.2.el";
  -          sha256 = "0gdqh5rkgwlancbjx5whgl5gqkdipdkspkl2bqmrq70sgg5ahrcc";
  +        version = "0.7.4";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/undo-tree-0.7.4.el";
  +          sha256 = "018ixl802f076sfyf4gkacpgrdpybin88jd8vq9zgyvc6x2dalfa";
           };
           packageRequires = [];
           meta = {
  
positive.code:       elpaBuild {
          pname = "map";
          ename = "map";
          version = "2.0";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/map-2.0.el";
            sha256 = "1djygpvk1qgldg9my0lh8n2z1n6acz3y5ws7sv2w08hvxdlxz857";
          };
          packageRequires = [ emacs ];
          meta = {
  
negative.code:       elpaBuild {
          pname = "posframe";
          ename = "posframe";
          version = "0.6.0";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/posframe-0.6.0.el";
            sha256 = "14x2jgjn8di03rrad4x4mn8fhcqibk1j5c0ya0vmv8648fki6i9d";
          };
          packageRequires = [ emacs ];
          meta = {
  