anchor.diff:        elpaBuild {
           pname = "sweeprolog";
           ename = "sweeprolog";
  -        version = "0.8.3";
  -        src = fetchurl {
  -          url = "https://elpa.nongnu.org/nongnu/sweeprolog-0.8.3.tar";
  -          sha256 = "0gng74bxb0nw7lm147gq2qsgry7y1dwskhrqfzfvx6jjvw86lcg7";
  +        version = "0.8.6";
  +        src = fetchurl {
  +          url = "https://elpa.nongnu.org/nongnu/sweeprolog-0.8.6.tar";
  +          sha256 = "108hjh276xgl0xhn2f7h43725xi49zh6j2xrcc17xw2i0phhhswf";
           };
           packageRequires = [ emacs ];
           meta = {
  
positive.code:       elpaBuild {
          pname = "vcomplete";
          ename = "vcomplete";
          version = "1.2.1";
          src = fetchurl {
            url = "https://elpa.nongnu.org/nongnu/vcomplete-1.2.1.tar";
            sha256 = "1fcchgv4kdmhzgincfy1jm625lwj3qrjskd0cswag5z15by6b5xf";
          };
          packageRequires = [ emacs ];
          meta = {
  
negative.code:       elpaBuild {
          pname = "helm";
          ename = "helm";
          version = "3.8.9";
          src = fetchurl {
            url = "https://elpa.nongnu.org/nongnu/helm-3.8.9.tar";
            sha256 = "0hikp6g5g7cy290qxd768vxy91gxj92cwrrzp8kicxy3qck1q39v";
          };
          packageRequires = [ helm-core popup ];
          meta = {
  