anchor.diff:    };
   
     base58 = buildFromGitHub {
  -    version = 5;
  -    rev = "c1bdf7c52f59d6685ca597b9955a443ff95eeee6";
  +    version = 6;
  +    rev = "4df4dc6e86a912614d09719d10cad427b087cbfb";
       owner  = "mr-tron";
       repo   = "base58";
  -    sha256 = "0c7w1kif0vw68617ac7hsaxlq5v2s71byhd0wxjmvirkyi447jjx";
  -    date = "2017-12-18";
  +    sha256 = "0173rmw4sjnf8g7g7hqmxwg6d4arn9ynxrszw7qqpnv04dfjv7fd";
  +    date = "2018-06-21";
     };
   
     binary = buildFromGitHub {
  
positive.code: 
    martian = buildFromGitHub {
      version = 6;
      rev = "192c2e388b35072c44ba1a7dafd7b8e00ff377c1";
      owner = "google";
      repo = "martian";
      sha256 = "0hv056grkx6m3af3blh3v3liskaizfv591vp849vz1qy33iksnbx";
      date = "2018-05-10";
      propagatedBuildInputs = [
        net
      ];
  
negative.code:     version = 6;
      owner = "ipfs";
      repo = "go-log";
      rev = "v1.5.3";
      sha256 = "1m821zgrcg88zkwyaxl0fprk7w8yygy5yg7rhbikgwncicraf6j2";
      propagatedBuildInputs = [
        go-colorable
        whyrusleeping_go-logging
  