anchor.diff:        elpaBuild {
           pname = "yasnippet";
           ename = "yasnippet";
  -        version = "0.13.0";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/yasnippet-0.13.0.tar";
  -          sha256 = "1klnvyy8az3h7i7yrpbhad4ka9p9vlgf918ha1vf7i3wbcbm0s5z";
  +        version = "0.14.0";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/yasnippet-0.14.0.tar";
  +          sha256 = "1lbil3dyz43nmr2lvx9vhpybqynpb7shg7m1xl1f7j4vm4dh0r08";
           };
           packageRequires = [ cl-lib ];
           meta = {
  
positive.code:       elpaBuild {
          pname = "gnus-mock";
          ename = "gnus-mock";
          version = "0.4.2";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/gnus-mock-0.4.2.tar";
            sha256 = "04ddmdm2hykgr2y9g2yzmjp3fszhaywwnxhiy608cpvqdjwlwhn7";
          };
          packageRequires = [];
          meta = {
  
negative.code:       elpaBuild {
          pname = "eev";
          ename = "eev";
          version = "20191105";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/eev-20191105.tar";
            sha256 = "0w53wq8nhl4c5czda5imcv7y97pgbpfmvcvpi6kdwl3jbn9cx396";
          };
          packageRequires = [ emacs ];
          meta = {
  