anchor.diff:    };
   
     relaysrv = buildFromGitHub rec {
  -    date   = "2015-12-07";
  -    rev    = "5837e48ee186068709a99a8681b5041c2d636e99";
  +    rev = "v0.12.1";
       owner  = "syncthing";
       repo   = "relaysrv";
  -    sha256 = "03p5aggvbhqkhhzd3lzhakky7v4v0rn7qna73ikh10hnwvmp4fg6";
  +    sha256 = "0lnq3pi8v5rwfvx4k93a7aiq44b1rx5dydp29si10w02592m9nbr";
       buildInputs = [ syncthing-lib du ratelimit net ];
       excludedPackages = "testutil";
     };
  
positive.code:   };
  
    glog = buildFromGitHub {
      rev    = "fca8c8854093a154ff1eb580aae10276ad6b1b5f";
      date   = "2015-07-31";
      owner  = "golang";
      repo   = "glog";
      sha256 = "1nr2q0vas0a2f395f4shjxqpas18mjsf8yhgndsav7svngpbbpg8";
    };
  
    codesearch = buildFromGitHub {
  
negative.code:     inherit (syncthing) rev owner repo sha256;
      subPackages = [
        "lib/sync"
        "lib/logger"
        "lib/protocol"
        "lib/osutil"
        "lib/tlsutil"
  