anchor.diff:  
     net = buildFromGitHub {
       version = 2;
  -    rev = "4971afdc2f162e82d185353533d3cf16188a9f4e";
  -    date = "2016-11-16";
  +    rev = "6cdc0daab091c43fc46193327e0047b4f883c613";
  +    date = "2016-11-29";
       owner  = "golang";
       repo   = "net";
  -    sha256 = "0skrqw9wn717s080vi4dwz0gva44s74q6xli2sw77ixibqky01fz";
  +    sha256 = "1x2f2yzg60vdl4zwjydih85rgr8ylmbh2lni5lwgzv0rz41k1p3d";
       goPackagePath = "golang.org/x/net";
       goPackageAliases = [
         "github.com/hashicorp/go.net"
  
positive.code: 
    tools = buildFromGitHub {
      version = 2;
      rev = "cbfb669053f449915d8520a0e5c87240ec4d3e13";
      date = "2016-11-22";
      owner = "golang";
      repo = "tools";
      sha256 = "1aq5x8r03nkdw2zq8dwn4avcrp3dyfhrdzwy6q1dxricdsx5q1gc";
      goPackagePath = "golang.org/x/tools";
      goPackageAliases = [ "code.google.com/p/go.tools" ];
  
  
negative.code: 
    oauth2 = buildFromGitHub {
      version = 2;
      rev = "f6093e37b6cb4092101a298aba5d794eb570757f";
      date = "2016-11-07";
      owner = "golang";
      repo = "oauth2";
      sha256 = "15rf03adwvx1ldxc891aljfaaaszjilda0k4mygp51irs8r4b45d";
      goPackagePath = "golang.org/x/oauth2";
      goPackageAliases = [ "github.com/golang/oauth2" ];
      propagatedBuildInputs = [
  