anchor.diff:  
     tablewriter = buildFromGitHub {
       version = 2;
  -    rev = "a0225b3f23b5ce0cbec6d7a66a968f8a59eca9c4";
  -    date = "2017-01-22";
  +    rev = "febf2d34b54a69ce7530036c7503b1c9fbfdf0bb";
  +    date = "2017-01-28";
       owner  = "olekukonko";
       repo   = "tablewriter";
  -    sha256 = "1z4qi18dnmlz1wzkzwshr6h5v6rysgxz5psvhx1cymjhr1nxqd2n";
  +    sha256 = "0wava2c1by6cdrm0kxf1ldkayip6sivlwankgrhiw6sj645w5km9";
       propagatedBuildInputs = [
         go-runewidth
       ];
  
positive.code:   ipfs = buildFromGitHub {
      version = 2;
      date = "2017-01-27";
      rev = "5d27b5cf9ce1764bff36c89a9241672c8146ed17";
      owner = "ipfs";
      repo = "go-ipfs";
      sha256 = "1l9xj0cjrlj6yjna3f74p6y6klikgv9smxz79593sqca88m17mhr";
      gxSha256 = "1lm34jlqyvy8562gayzsbx04ggpmvxwwclgm1g47msqk31458chb";
      subPackages = [
        "cmd/ipfs"
        "cmd/ipfswatch"
  
negative.code: 
    procfs = buildFromGitHub {
      version = 2;
      rev = "1878d9fbb537119d24b21ca07effd591627cd160";
      date = "2017-01-28";
      owner  = "prometheus";
      repo   = "procfs";
      sha256 = "0l94wxacnw9vanqn8rxac8znx7r2015ihak4b24ss9lar6ry0ckp";
    };
  
    properties = buildFromGitHub {
  