anchor.diff:            license = lib.licenses.free;
           };
         }) {};
  -    xref = callPackage ({ elpaBuild, emacs, fetchurl, lib, project }:
  +    xref = callPackage ({ elpaBuild, emacs, fetchurl, lib }:
         elpaBuild {
           pname = "xref";
           ename = "xref";
  -        version = "1.0.1";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/xref-1.0.1.el";
  -          sha256 = "17wlwilm2d1gvin8mkkqnpw2skjx0klxfs1pqpy8rrzdfpsb55li";
  -        };
  -        packageRequires = [ emacs project ];
  +        version = "1.0.2";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/xref-1.0.2.el";
  +          sha256 = "156rfwdihb3vz31iszbmby16spqswyf69nhl3r2cp6jzkgwzc1d8";
  +        };
  +        packageRequires = [ emacs ];
           meta = {
             homepage = "https://elpa.gnu.org/packages/xref.html";
             license = lib.licenses.free;
  
positive.code:       elpaBuild {
          pname = "exwm";
          ename = "exwm";
          version = "0.23";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/exwm-0.23.tar";
            sha256 = "05w1v3wrp1lzz20zd9lcvr5nhk809kgy6svvkbs15xhnr6x55ad5";
          };
          packageRequires = [ xelb ];
          meta = {
  
negative.code:           license = lib.licenses.free;
          };
        }) {};
      project = callPackage ({ elpaBuild, emacs, fetchurl, lib, xref }:
        elpaBuild {
          pname = "project";
          ename = "project";
          version = "0.5.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/project-0.5.1.el";
            sha256 = "1i15hlrfipsfrdmgh6xzkr6aszgvik3y8j9363qkj654dl04pmz4";
          };
          packageRequires = [ emacs xref ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/project.html";
            license = lib.licenses.free;
  