anchor.diff:      version = 6;
       owner = "opentracing";
       repo = "opentracing-go";
  -    rev = "8b5a441dc60e8d9bb9bf9d22060b6d94fa599983";
  -    sha256 = "Qai6kaiajgincq2ST2+IRDsfWBd2GgROrMr6DcyVfAQ=";
  +    rev = "25a84ff92183e2f8ac018ba1db54f8a07b3c0e04";
  +    sha256 = "b92071aa3e34cfe7110b288a9c55b9bc7b8fcd0dc78e3a5845c070bbeecf7ae2";
       goPackageAliases = [
         "github.com/frrist/opentracing-go"
       ];
  
positive.code: 
    httpcache = buildFromGitHub {
      version = 6;
      rev = "c63ab54fda8f77302f8d414e19933f2b6026a089";
      owner  = "gregjones";
      repo   = "httpcache";
      sha256 = "iT6P6SwFkZifKeK1quUlDdocg2RDwxAb1iW9M8qAZyU=";
      date = "2018-11-10";
      propagatedBuildInputs = [
        diskv
        goleveldb
  
negative.code: 
    netlink = buildFromGitHub {
      version = 6;
      rev = "b9cafe4a8544a27110dad06be07d48bbe5f292dd";
      owner  = "vishvananda";
      repo   = "netlink";
      sha256 = "eb50e6fb5eaf9f7990e609f587767db17583e8239446279ecc7674715e913675";
      propagatedBuildInputs = [
        netns
        sys
      ];
      date = "2019-02-06";
    };
  
    netns = buildFromGitHub {
  