anchor.diff:    };
   
     go-farm = buildFromGitHub {
  -    version = 2;
  -    rev = "83948bc0eb076b6b72c28abe5282fa8cf5240db6";
  +    version = 3;
  +    rev = "e2d0fe22b456fa0a35cd883ba355ecfcf1881490";
       owner  = "dgryski";
       repo   = "go-farm";
  -    sha256 = "1pmai6x37k7qfggzzg12qhm0qg974rbkw43vv1pcqmw8fcljqg00";
  -    date = "2016-12-02";
  +    sha256 = "052zb0hcvny391dhfz5wzd9jhzj8x16bw86hapyw9987vv2sx4ps";
  +    date = "2017-05-02";
     };
   
     go-flags = buildFromGitHub {
  
positive.code:   };
  
    go-getter = buildFromGitHub {
      version = 2;
      rev = "e48f67b534e614bf7fbd978fd0020f61a17b7527";
      date = "2017-04-05";
      owner = "hashicorp";
      repo = "go-getter";
      sha256 = "14yhin5rm6nn72486410fx3vc5rbk7rnkfbv4v1952a44z71mc4r";
      propagatedBuildInputs = [
        aws-sdk-go
        go-homedir
  
negative.code: 
    docker = buildFromGitHub {
      version = 3;
      rev = "fa54c94b9d70c0582012aaef18991e1fb4dd59ba";
      owner = "docker";
      repo = "docker";
      sha256 = "1zixkgbbgfc7y2216pz3p402jqpkry3k6fzijhzqf6nrww630cmp";
      meta.useUnstable = true;
      date = "2017-05-02";
      propagatedBuildInputs = [
        distribution_for_docker
        errors
  