anchor.diff:        elpaBuild {
           pname = "vertico";
           ename = "vertico";
  -        version = "0.19";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/vertico-0.19.tar";
  -          sha256 = "1i9aqxsplmzyy7nv4czspa66a6v33lnng1d8zsgjf1m9sz0kyzxp";
  +        version = "0.20";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/vertico-0.20.tar";
  +          sha256 = "1hg91f74klbwisxzp74d020v42l28wik9y1lg3hrbdspnhlhsdrl";
           };
           packageRequires = [ emacs ];
           meta = {
  
positive.code:         packageRequires = [ emacs ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/temp-buffer-browse.html";
            license = lib.licenses.free;
          };
        }) {};
  
negative.code:       elpaBuild {
          pname = "posframe";
          ename = "posframe";
          version = "1.1.7";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/posframe-1.1.7.tar";
            sha256 = "13i2wxx079gfq0vbq0iwmsig5b7x4aspd1q02yqc79846f1dsx4w";
          };
          packageRequires = [ emacs ];
          meta = {
  