anchor.diff:        testify
       ];
       meta.useUnstable = true;
  -    date = "2017-01-12";
  +    date = "2017-01-14";
     };
   
     cupcake_rdb = buildFromGitHub {
  
positive.code: 
    armon_go-metrics = buildFromGitHub {
      version = 2;
      date = "2016-11-04";
      rev = "97c69685293dce4c0a2d0b19535179bbc976e4d2";
      owner = "armon";
      repo = "go-metrics";
      sha256 = "075bz3ibx6i8mdlkvclnh035fpqrq6ymwcb7jj85ldr6fb7y08p3";
      propagatedBuildInputs = [
        circonus-gometrics
        datadog-go
  
negative.code: 
    net = buildFromGitHub {
      version = 2;
      rev = "f2499483f923065a842d38eb4c7f1927e6fc6e6d";
      date = "2017-01-14";
      owner  = "golang";
      repo   = "net";
      sha256 = "00220xp5nczzyhm5b71hnx8qj7xc6hxvv7h0psb1bi4sbwbgkzp3";
      goPackagePath = "golang.org/x/net";
      goPackageAliases = [
        "github.com/hashicorp/go.net"
  