anchor.diff:  
     ipfs = buildFromGitHub {
       version = 2;
  -    date = "2016-11-10";
  -    rev = "4442498d926a25b4084affe70d15d7c8dcf9a6f8";
  +    date = "2016-11-21";
  +    rev = "9094cc8f4297b9365a3d3260f839724b135094d0";
       owner = "ipfs";
       repo = "go-ipfs";
  -    sha256 = "0zs43397m5hdii0f68fsb8plx4519yfaqw0g53ji5w18kd5gvj25";
  -    gxSha256 = "1g9z9f4v9ca1lv90ibzfxj6in34ijbxdgj0x6s1xrfx346jncyxl";
  +    sha256 = "1dn9ff04rl0lzdlzg4wzl1c8qfwyjr1pw5p26cm3abvabgg0b49r";
  +    gxSha256 = "1zn9zdpqgp80gvk5xsiiikqjsks93vxsdzqzk9dk9kqgps61pz8p";
       subPackages = [
         "cmd/ipfs"
         "cmd/ipfswatch"
  
positive.code: 
    utp = buildFromGitHub {
      version = 2;
      rev = "83bf7c81b0e1f917f18ac31b7a27b91c33737df9";
      owner  = "anacrolix";
      repo   = "utp";
      sha256 = "0zprk0nv0b79ld4cp0zxxqmxzfvrgixr5ifm98wrdymp795rplzf";
      date = "2016-10-06";
      propagatedBuildInputs = [
        envpprof
        missinggo
  
negative.code: 
    urfave_cli = buildFromGitHub {
      version = 2;
      rev = "v1.19.0";
      owner = "urfave";
      repo = "cli";
      sha256 = "beeb91b8c76df51ab8857d681ab6e15d036719feaf85ad3c8f1dfbf15af903e3";
      goPackagePath = "gopkg.in/urfave/cli.v1";
      goPackageAliases = [
        "github.com/codegangsta/cli"
        "github.com/urfave/cli"
      ];
      buildInputs = [
        toml
        yaml_v2
      ];
    };
  