anchor.diff:      goPackagePath = "github.com/kardianos/osext";
       goPackageAliases = [
         "github.com/bugsnag/osext"
  +      "bitbucket.org/kardianos/osext"
       ];
   
       src = fetchFromGitHub {
  
positive.code:     rev = "295c7b21db5d9525ad959e3382610f3aff029663";
      name = "asn1-ber-${stdenv.lib.strings.substring 0 7 rev}";
      goPackagePath = "github.com/vanackere/asn1-ber";
  
      src = fetchFromGitHub {
        inherit rev;
  
negative.code:   };
  
    msgpack = buildGoPackage rec {
      rev = "9dbd4ac30c0b67927f0fb5557fb8341047bd35f7";
      name = "msgpack-${stdenv.lib.strings.substring 0 7 rev}";
      goPackagePath = "gopkg.in/vmihailenco/msgpack.v2";
  
      src = fetchFromGitHub {
        inherit rev;
        owner = "vmihailenco";
        repo = "msgpack";
        sha256 = "0nq9yb85hi3c35kwyl38ywv95vd8n7aywmj78wwylglld22nfmw2";
      };
    };
  
  