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:   };
  
    prometheus_client_golang = buildFromGitHub {
      rev = "90c15b5efa0dc32a7d259234e02ac9a99e6d3b82";
      owner = "prometheus";
      repo = "client_golang";
      sha256 = "03n3pp6kmbjh8dfskibkj4gd2mwg38nqsgg81661myjncff07x18";
      propagatedBuildInputs = [
        goautoneg
        net
  
negative.code:   };
  
    go-systemd = buildFromGitHub {
      rev = "8aa4c5cfbebc9ae1c3ce10df0dbf75658ae574ef";
      owner = "coreos";
      repo = "go-systemd";
      sha256 = "1g8wzsl7qamb2r9mzyxzbd43qr9rwj302pjfxqx2x1rdbjzxg0wk";
      propagatedBuildInputs = [ pkgs.systemd_lib dbus ];
      date = "2016-05-13";
    };
  
    go-units = buildFromGitHub {
  