anchor.diff:        elpaBuild {
           pname = "arbitools";
           ename = "arbitools";
  -        version = "0.97";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/arbitools-0.97.el";
  -          sha256 = "0fx1z4mw3v42xzixsj80xw56pg00bch04galkjbxbqzm25nl4aha";
  +        version = "0.976";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/arbitools-0.976.el";
  +          sha256 = "08lvm921zhm22aghz17pps0b5g4f1xyyrl0qisdvd98kz1ajq7xr";
           };
           packageRequires = [ cl-lib ];
           meta = {
  
positive.code:         packageRequires = [ seq ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/beacon.html";
            license = lib.licenses.free;
          };
        }) {};
  
negative.code:       elpaBuild {
          pname = "math-symbol-lists";
          ename = "math-symbol-lists";
          version = "1.2.1";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/math-symbol-lists-1.2.1.el";
            sha256 = "015q44qg9snrpz04syz89f9f79pzg5h7w88nh84p38klynkx2f86";
          };
          packageRequires = [];
          meta = {
  