anchor.diff:  
     net = buildFromGitHub {
       version = 2;
  -    rev = "f09c4662a0bd6bd8943ac7b4931e185df9471da4";
  -    date = "2016-09-24";
  +    rev = "a333c534c871727fb95745870e8b98a69447f2ce";
  +    date = "2016-09-29";
       owner  = "golang";
       repo   = "net";
  -    sha256 = "0cqip7b0s2r9yy27l1wc9zpiz6wagrhyay466ggdn3xlnbjkvqyg";
  +    sha256 = "0j09wvllnpy2ycbqdrc222f4afdkdsprkzipai70wzq7xi4rh6mr";
       goPackagePath = "golang.org/x/net";
       goPackageAliases = [
         "code.google.com/p/go.net"
  
positive.code:   };
  
    go-multihash = buildFromGitHub {
      version = 1;
      rev = "5bb8e87657d874eea0af6366dc6336c4d819e7c1";
      owner  = "jbenet";
      repo   = "go-multihash";
      sha256 = "10rrb4ahb3a33p1cxq2mdx84aa1p8d3ajh9h0rlffkhbgx21md0w";
      propagatedBuildInputs = [ go-base58 crypto ];
      date = "2016-08-04";
    };
  
    go-multipart-files = buildFromGitHub {
  
negative.code: 
    ipfs = buildFromGitHub {
      version = 2;
      date = "2016-09-28";
      rev = "0ac1fd1a8a88db47af26a508e3e010c6a7d007f9";
      owner = "ipfs";
      repo = "go-ipfs";
      sha256 = "15szdwjrzbfn5jxycpry1h5xcycr6zvmxnn7zzbx02bnp2hb7zbr";
      gxSha256 = "1cgmi27r5gpx71aqbdcak4ryjq5njygmbj3323kh78xmk3mqlsfn";
      subPackages = [
        "cmd/ipfs"
        "cmd/ipfswatch"
  