anchor.diff:        elpaBuild {
           pname = "swsw";
           ename = "swsw";
  -        version = "2.2";
  -        src = fetchurl {
  -          url = "https://elpa.nongnu.org/nongnu/swsw-2.2.tar";
  -          sha256 = "0bxcpk5329g4xdfnx8n70q53v4aansxfcs3fdpzssayyyv4fk72m";
  +        version = "2.3";
  +        src = fetchurl {
  +          url = "https://elpa.nongnu.org/nongnu/swsw-2.3.tar";
  +          sha256 = "0qwdv174bh9k1bpd5szzmhk7hw89xf7rz2i2hzdrmlpvcs3ps653";
           };
           packageRequires = [ emacs ];
           meta = {
  
positive.code:         packageRequires = [ emacs ];
          meta = {
            homepage = "https://elpa.gnu.org/packages/pcmpl-args.html";
            license = lib.licenses.free;
          };
        }) {};
  
negative.code:       elpaBuild {
          pname = "web-mode";
          ename = "web-mode";
          version = "17.3.3";
          src = fetchurl {
            url = "https://elpa.nongnu.org/nongnu/web-mode-17.3.3.tar";
            sha256 = "1ci28dfg6k4hwiqz85v9c24n7s52z29ghfyfjg971lq4mfqbx4yy";
          };
          packageRequires = [ emacs ];
          meta = {
  