anchor.diff:  
     text = buildFromGitHub {
       version = 2;
  -    rev = "2df9074612f50810d82416d2229398a1e7188c5c";
  -    date = "2016-09-15";
  +    rev = "a7c023693a94aedd6b6df43ae7526bfe9d2b7d22";
  +    date = "2016-09-22";
       owner = "golang";
       repo = "text";
  -    sha256 = "0iw4ck14mhdll6l825nw1dp6jcbr2ccy3x3zpp2zkk433gx90iml";
  +    sha256 = "002r51abslnm7d4mgvgq9nxgrm7mbh009mk8l1abgj11safzxf2v";
       goPackagePath = "golang.org/x/text";
       goPackageAliases = [ "github.com/golang/text" ];
  +    excludedPackages = "cmd";
     };
   
     tools = buildFromGitHub {
  
positive.code: 
    ipfs = buildFromGitHub {
      version = 2;
      date = "2016-09-19";
      rev = "e10453b67bb8e683082ebde345d0080f05aeca12";
      owner = "ipfs";
      repo = "go-ipfs";
      sha256 = "38f48703cf43eda32c4071ea29546d0e746064b41ab08f1037bae867cf46edc7";
      gxSha256 = "04ak7xgchnrxcyw1cih2xvix73j13f0zrh425l1cv2sycjdn0n9q";
      subPackages = [
        "cmd/ipfs"
        "cmd/ipfswatch"
  
negative.code:   };
  
    go-humanize = buildFromGitHub {
      version = 2;
      rev = "bd88f87ad3a420f7bcf05e90566fd1ceb351fa7f";
      owner = "dustin";
      repo = "go-humanize";
      sha256 = "0j2dza7xz93ksmc67cc8qhfxn7wpqq4xdjdr2p9f2ilqyq31pavh";
      date = "2016-09-23";
    };
  
    go-immutable-radix = buildFromGitHub {
  