anchor.diff:  
     go-getter = buildFromGitHub {
       version = 2;
  -    rev = "21d247ece01f1f7d5b56f130fd7b1db19bb0d0db";
  -    date = "2017-01-09";
  +    rev = "8ff1c8c40df23480de72ae5f133e2a2be27b119a";
  +    date = "2017-01-21";
       owner = "hashicorp";
       repo = "go-getter";
  -    sha256 = "02s6miwibgrdamx74hyvqalvhms8ipw2yrlxpaki80awmw08lpj3";
  +    sha256 = "08m8dw2x12h7mbd2h74z59wkm9rv2jissvqxgzl2mcb8v9hy8kz8";
       propagatedBuildInputs = [
         aws-sdk-go
         go-homedir
  
positive.code: 
    ipfs = buildFromGitHub {
      version = 2;
      date = "2017-01-19";
      rev = "42cb5d4ae3a47b6920d2af2b18eb71a2dcee0a02";
      owner = "ipfs";
      repo = "go-ipfs";
      sha256 = "0gh3cqx2aq5jdkf68kib8jfh4jxnys8f9awb2334pgy4icmgwc3k";
      gxSha256 = "1y8j32rxa3j1dn8rx97c594f8dwzsn6ffx18r59cm9ndb1c74knz";
      subPackages = [
        "cmd/ipfs"
        "cmd/ipfswatch"
  
negative.code: 
    go-dockerclient = buildFromGitHub {
      version = 2;
      date = "2017-01-20";
      rev = "53f04ab33b89eef256c320c36435a10b672d473d";
      owner = "fsouza";
      repo = "go-dockerclient";
      sha256 = "1da80a4h7wl9s4byr51nbls8b51xkm72dhvm2fgfldiv0bazygqp";
      propagatedBuildInputs = [
        docker_for_go-dockerclient
        go-cleanhttp
  