anchor.diff:  
     net = buildFromGitHub {
       version = 2;
  -    rev = "a333c534c871727fb95745870e8b98a69447f2ce";
  -    date = "2016-09-29";
  +    rev = "cd95c68ba21fc7ee16ee38cc420473e3d8c4afd8";
  +    date = "2016-10-01";
       owner  = "golang";
       repo   = "net";
  -    sha256 = "0j09wvllnpy2ycbqdrc222f4afdkdsprkzipai70wzq7xi4rh6mr";
  +    sha256 = "1a9vjy14mdzz9iy47jriq3q38vb3qd3nvzfmvh7yl5ssyi2yhayq";
       goPackagePath = "golang.org/x/net";
       goPackageAliases = [
         "code.google.com/p/go.net"
  
positive.code: 
    gcloud-golang = buildFromGitHub {
      version = 2;
      date = "2016-09-28";
      rev = "debdc0ca0113dd546ebebeb2000c9d938059f41d";
      owner = "GoogleCloudPlatform";
      repo = "gcloud-golang";
      sha256 = "1635f1gvjn22cb0z1jj175kjfv3mz6jnz49sgyrf15npsfqc72vc";
      goPackagePath = "cloud.google.com/go";
      goPackageAliases = [
        "google.golang.org/cloud"
  
negative.code:     version = 2;
      owner = "coreos";
      repo = "etcd";
      rev = "v3.0.10";
      sha256 = "1my1v7rf1m1n19na2chn9plw6qd3093mnyq51pjy9l1cf1rd9lrj";
      buildInputs = [
        bolt
        btree
  