anchor.diff:        elpaBuild {
           pname = "project";
           ename = "project";
  -        version = "0.7.1";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/project-0.7.1.tar";
  -          sha256 = "1ip8s924n50mmh068p42zi0ylvv79a2pi9sji1c2pqj2q19d7jr6";
  +        version = "0.8.0";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/project-0.8.0.tar";
  +          sha256 = "05q2zr661bn2h6pdvyv3apdajfxnsx0rb0n5np8cg98a7gw4zyxd";
           };
           packageRequires = [ emacs xref ];
           meta = {
  
positive.code:       elpaBuild {
          pname = "setup";
          ename = "setup";
          version = "1.0.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/setup-1.0.1.tar";
            sha256 = "1n390hiv5a8ij584r24cpbahj2sb12wjh0l3kzhccdxnxskrzgmh";
          };
          packageRequires = [ emacs ];
          meta = {
  
negative.code:         packageRequires = [ emacs svg ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/svg-clock.html";
            license = lib.licenses.free;
          };
        }) {};
      svg-lib = callPackage ({ elpaBuild, emacs, fetchurl, lib }:
        elpaBuild {
          pname = "svg-lib";
          ename = "svg-lib";
          version = "0.2";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/svg-lib-0.2.tar";
            sha256 = "0361w1paqrgqlv8wj5vf9ifssddrk2bwlarp2c2wzlxks3ahdf2x";
          };
          packageRequires = [ emacs ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/svg-lib.html";
            license = lib.licenses.free;
          };
        }) {};
  