anchor.diff:    };
   
     go-dockerclient = buildFromGitHub {
  -    date = "2016-02-13";
  -    rev = "9184fe7a2d7c920b8cdd30faa64fe025f609ef20";
  +    date = "2016-02-23";
  +    rev = "a49c8269a6899cae30da1f8a4b82e0ce945f9967";
       owner = "fsouza";
       repo = "go-dockerclient";
  -    sha256 = "0chn214jzia6v7wmdb5z7pf0k1mn814khd00waphr3jr6i2m9pam";
  +    sha256 = "1vlp3w1f8ib0h6xn4am1a3k1bm966smyrv92bb9h6xjf2cmzjwxa";
     };
   
     go-etcd = buildFromGitHub {
  
positive.code:     repo = "statsd_bridge";
      sha256 = "1fndpmd1k0a3ar6f7zpisijzc60f2dng5399nld1i1cbmd8jybjr";
      buildInputs = [ fsnotify.v0 prometheus_client_golang ];
      meta = with stdenv.lib; {
        description = "Receives StatsD-style metrics and exports them to Prometheus";
        homepage = https://github.com/prometheus/statsd_bridge;
        license = licenses.asl20;
        maintainers = with maintainers; [ benley ];
        platforms = platforms.unix;
      };
    };
  
    properties = buildFromGitHub {
  
negative.code: 
  
    protobuf = buildFromGitHub {
      rev = "552c7b9542c194800fd493123b3798ef0a832032";
      date = "2016-02-26";
      owner = "golang";
      repo = "protobuf";
      sha256 = "1zaw1xxnvgsvfcrv5xkn1f7p87vyh9i6mc44csl11fgc2hvqp6xm";
      goPackagePath = "github.com/golang/protobuf";
      goPackageAliases = [ "code.google.com/p/goprotobuf" ];
    };
  
    snappy = buildFromGitHub {
      rev = "427fb6fc07997f43afa32f35e850833760e489a7";
      date = "2016-02-26";
      owner  = "golang";
      repo   = "snappy";
      sha256 = "1hgk9zhkfdvxrz13k0glqwlz414803zkrzd01mv6fjhpsjmcx53b";
      goPackageAliases = [ "code.google.com/p/snappy-go/snappy" ];
    };
  
    sys = buildFromGitHub {
      rev = "54535356f1d989a6072b0898d9ddc4dd7009dcd3";
      date = "2016-02-29";
      owner  = "golang";
      repo   = "sys";
      sha256 = "14gfzj3jwbskz6303108l4hpnb85zc9fk0rdnq2mhxnfxr4r1rxn";
      goPackagePath = "golang.org/x/sys";
      goPackageAliases = [
        "github.com/golang/sys"
  