anchor.diff:        }) {};
       vlf = callPackage ({ elpaBuild, fetchurl, lib }: elpaBuild {
           pname = "vlf";
  -        version = "1.7";
  -        src = fetchurl {
  -          url = "https://elpa.gnu.org/packages/vlf-1.7.tar";
  -          sha256 = "007zdr5szimr6nwwrqz9s338s0qq82r006pdwgcm8nc41jsmsx7r";
  +        version = "1.7.1";
  +        src = fetchurl {
  +          url = "https://elpa.gnu.org/packages/vlf-1.7.1.tar";
  +          sha256 = "0cnwxk20573iqkwk0c0h7pyjk0rkr8l2qd0xmyqj8mvdxjb8nnkz";
           };
           packageRequires = [];
           meta = {
  
positive.code:     el-search = callPackage ({ elpaBuild, emacs, fetchurl, lib, stream }:
      elpaBuild {
          pname = "el-search";
          version = "1.4.0.11";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/el-search-1.4.0.11.tar";
            sha256 = "12m468fxwfrwjkm0wcraafb7n9shh9fmw43nggc216ch3syxmfaw";
          };
          packageRequires = [ emacs stream ];
          meta = {
  
negative.code:     arbitools = callPackage ({ cl-lib ? null, elpaBuild, fetchurl, lib }:
      elpaBuild {
          pname = "arbitools";
          version = "0.93";
          src = fetchurl {
            url = "https://elpa.gnu.org/packages/arbitools-0.93.el";
            sha256 = "0z3lqp8dqfkams5h4sw569p48d2rvpd3d8lb4xaw0z8l49y2mvg8";
          };
          packageRequires = [ cl-lib ];
          meta = {
  