anchor.diff:  
     docker_cli = buildFromGitHub {
       version = 3;
  -    date = "2017-08-07";
  -    rev = "227e042ff0fd14d768a3b8b4b40bbb788513a196";
  +    date = "2017-08-08";
  +    rev = "4b61f560b5b0812fcebbe320a98baac9408a5dd4";
       owner = "docker";
       repo = "cli";
  -    sha256 = "01705w633x25azy6w51np6l0jjkgnfa2qy81mkknk6akry325nd3";
  +    sha256 = "01c6f2byg2q7kkhdc9s7qvxfxxm52agqlm7dzi5yy86bqiwkvzhk";
       subPackages = [
         "cli/config/configfile"
         "cli/config/credentials"
  
positive.code: 
    swift = buildFromGitHub {
      version = 3;
      rev = "e3042b26a510db220549150362f6733012148d45";
      owner  = "ncw";
      repo   = "swift";
      sha256 = "07sdkk83810alhwnsch5dxzj38wmyn1yyhqc85rkw96qxrmmx1rw";
      date = "2017-07-26";
    };
  
    anacrolix_sync = buildFromGitHub {
  
negative.code: 
    go-nats-streaming = buildFromGitHub {
      version = 3;
      rev = "74358b8d57b1beed7a9cebbe332437f46ac2aed4";
      owner = "nats-io";
      repo = "go-nats-streaming";
      sha256 = "1vwssdpmz2ai2s6wzhn7c12ixh9bkzdz1v2ilv1lm7fkinw031sd";
      propagatedBuildInputs = [
        go-nats
        nuid
        gogo_protobuf
      ];
      date = "2017-08-09";
    };
  
    go-netrc = buildFromGitHub {
  