anchor.diff:    };
   
     sys = buildFromGitHub {
  -    rev = "b776ec39b3e54652e09028aaaaac9757f4f8211a";
  -    date = "2016-04-20";
  +    rev = "f78f5183ff267d751d0af20bbe59158f3e4cd53e";
  +    date = "2016-05-15";
       owner  = "golang";
       repo   = "sys";
  -    sha256 = "08c5k25h5frld4pdjpg0r224dn25bccnhlbxacj9f867c3vsp35h";
  +    sha256 = "0vdgwxvlbm3m8y8syxz0kwcnz2askbpm2f3r4z9lc9kfrfrin9k4";
       goPackagePath = "golang.org/x/sys";
       goPackageAliases = [
         "github.com/golang/sys"
  
positive.code:   };
  
    netlink = buildFromGitHub {
      rev = "7ec36826870685e65907935a6a8848f10a30eeaf";
      owner  = "vishvananda";
      repo   = "netlink";
      sha256 = "01n9vhn9dzhal2i3r47giq5hwfzznv611xk3ssavgapg9l5y2llq";
      date = "2016-05-03";
    };
  
    nomad = buildFromGitHub {
  
negative.code:       prometheus_procfs
        beorn7_perks
      ];
      date = "2016-05-13";
    };
  
    prometheus_client_model = buildFromGitHub {
  