anchor.diff:            license = lib.licenses.free;
           };
         }) {};
  +    dired-du = callPackage ({ cl-lib ? null, elpaBuild, emacs, fetchurl, lib }:
  +    elpaBuild {
  +        pname = "dired-du";
  +        version = "0.5";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/dired-du-0.5.tar";
  +          sha256 = "09yj37p2fa5f81fqrzwghjkyy2ydsf4rbkfwpn2yyvzd5nd97bpl";
  +        };
  +        packageRequires = [ cl-lib emacs ];
  +        meta = {
  +          homepage = "https://elpa.gnu.org/packages/dired-du.html";
  +          license = lib.licenses.free;
  +        };
  +      }) {};
       dismal = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
       elpaBuild {
           pname = "dismal";
  
positive.code:       }) {};
      websocket = callPackage ({ elpaBuild, fetchurl, lib }: elpaBuild {
          pname = "websocket";
          version = "1.6";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/websocket-1.6.tar";
            sha256 = "09im218c1gkq1lg356rcqqpkydnpxs5qzdqkwk95pwndswb40a5a";
          };
          packageRequires = [];
          meta = {
  
negative.code:           license = lib.licenses.free;
          };
        }) {};
      kmb = callPackage ({ elpaBuild, emacs, fetchurl, lib }: elpaBuild {
          pname = "kmb";
          version = "0.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/kmb-0.1.el";
            sha256 = "1wjfk28illfd5bkka3rlhhq59r0pad9zik1njlxym0ha8kbhzsj8";
          };
          packageRequires = [ emacs ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/kmb.html";
            license = lib.licenses.free;
          };
        }) {};
      landmark = callPackage ({ elpaBuild, fetchurl, lib }: elpaBuild {
          pname = "landmark";
          version = "1.0";
  