anchor.diff:    };
   
     net = buildFromGitHub {
  -    rev    = "d5cd7348bfebdf7dbb6dbb18fa488525f9024293";
  -    date   = "2015-12-03";
  +    rev    = "0cb26f788dd4625d1956c6fd97ffc4c90669d129";
  +    date   = "2015-12-28";
       owner  = "golang";
       repo   = "net";
  -    sha256 = "03d3xnjr5l3xggrsxm8w170phgyqiqajp8k3xv6j4x4ajlar3i54";
  +    sha256 = "1ipjy9yq8m0sqh90zcvhf4jw6s6bpv9465yblh9w1iid06zvhylq";
       goPackagePath = "golang.org/x/net";
       goPackageAliases = [
         "code.google.com/p/go.net"
  
positive.code:   };
  
    text = buildFromGitHub {
      rev = "95315fc624fc42f9dd1ac02d056aaeb87e090cd7";
      date = "2015-12-07";
      owner = "golang";
      repo = "text";
      sha256 = "1ya7d2m2fgcl4xx7fpr701slw0031bxs3xcnjblfv3c7ljkdl70a";
      goPackagePath = "golang.org/x/text";
      goPackageAliases = [ "github.com/golang/text" ];
    };
  
    tools = buildFromGitHub {
      rev = "c0008c5889c0d5091cdfefd2bfb08bff96527879";
      date = "2015-12-04";
      owner = "golang";
      repo = "tools";
      sha256 = "0k07293bbmsbras5ffm5dlch0qqz7xk6rxk7r3652g51v9qyg5gs";
      goPackagePath = "golang.org/x/tools";
      goPackageAliases = [ "code.google.com/p/go.tools" ];
  
  
negative.code:   };
  
    sys = buildFromGitHub {
      rev    = "833a04a10549a95dc34458c195cbad61bbb6cb4d";
      date   = "2015-12-10";
      owner  = "golang";
      repo   = "sys";
      sha256 = "0lfam5kj2jl54cmkgr155mgidxgsxph3cyvw1zi0rbdkaj58crp1";
      goPackagePath = "golang.org/x/sys";
      goPackageAliases = [
        "github.com/golang/sys"
  