anchor.diff:      ztree = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
       elpaBuild {
           pname = "ztree";
  -        version = "1.0.3";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/ztree-1.0.3.tar";
  -          sha256 = "1mwzk48sah4w5jmlmzqxnwhnlnc2mf25ayhgymv24sv8c6hdllsw";
  +        version = "1.0.4";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/ztree-1.0.4.tar";
  +          sha256 = "0xiiaa660s8z7901siwvmqkqz30agfzsy3zcyry2r017m3ghqjph";
           };
           packageRequires = [ cl-lib ];
           meta = {
  
positive.code:       }) {};
      exwm = callPackage ({ elpaBuild, fetchurl, lib, xelb }: elpaBuild {
          pname = "exwm";
          version = "0.10";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/exwm-0.10.tar";
            sha256 = "1c8558dxy7a2m61a0bc0p5vrdw3nw03zq9s8wxgmdvlklyzbqa22";
          };
          packageRequires = [ xelb ];
          meta = {
  
negative.code:     debbugs = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib, soap-client }:
      elpaBuild {
          pname = "debbugs";
          version = "0.11";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/debbugs-0.11.tar";
            sha256 = "10v9s7ayvfzd6j6hqfc9zihxgmsc2j0xhxrgy3ah30qkqn6z8w6n";
          };
          packageRequires = [ cl-lib soap-client ];
          meta = {
  