anchor.diff:  
     grpc = buildFromGitHub {
       version = 5;
  -    rev = "v1.9.1";
  +    rev = "v1.9.2";
       owner = "grpc";
       repo = "grpc-go";
  -    sha256 = "1hapjdm5c6pgvlsfsy3hmqaxc4j7lrn6dyvz9y5bvq6jbj6g7gp5";
  +    sha256 = "1fgzcrp7ghgcj0dqnvy8fzfg9zp9zhjxyqp4jymmyihrvifknk47";
       goPackagePath = "google.golang.org/grpc";
       goPackageAliases = [
         "github.com/grpc/grpc-go"
  
positive.code:   };
  
    srslog = buildFromGitHub {
      version = 3;
      rev = "4d2c753a4ee12647a5a279ee6e6e767861509706";
      date = "2017-09-20";
      owner  = "RackSec";
      repo   = "srslog";
      sha256 = "0kpfdbh9852zqd4amlj0v3mwhlz650h2czlbgm9vdidps9siz6yq";
    };
  
    ssh-agent = buildFromGitHub {
  
negative.code:   };
  
    termbox-go = buildFromGitHub {
      version = 5;
      rev = "157ff97de075fe3e9e54bda782b8ca6b552dfff7";
      date = "2018-01-23";
      owner = "nsf";
      repo = "termbox-go";
      sha256 = "1sdnkv8fgarr3dflbxfnhjfc4k92nc69240ziy6q8bxb6s6plcr7";
      propagatedBuildInputs = [
        go-runewidth
      ];
  