anchor.diff:    };
   
     sys = buildFromGitHub {
  -    rev    = "2bacc619e34d59719d9ed86f0e04e8261aed3409";
  -    date   = "2015-11-24";
  +    rev    = "833a04a10549a95dc34458c195cbad61bbb6cb4d";
  +    date   = "2015-12-10";
       owner  = "golang";
       repo   = "sys";
  -    sha256 = "1wz735axs221jcdr7qbmm72vkkhngsl2zcaz0d4n2f721cbhb1bq";
  +    sha256 = "0lfam5kj2jl54cmkgr155mgidxgsxph3cyvw1zi0rbdkaj58crp1";
       goPackagePath = "golang.org/x/sys";
       goPackageAliases = [
         "github.com/golang/sys"
  
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:   };
  
    syncthing = buildFromGitHub rec {
      version = "0.12.10";
      rev = "v${version}";
      owner = "syncthing";
      repo = "syncthing";
      sha256 = "1xvar4mm6f33mg8d8z8h49cni6sj1vfns379zspqvszs404fra0z";
      buildFlags = [ "-tags noupgrade,release" ];
      disabled = isGo14;
      buildInputs = [
  