anchor.diff:  
   buildGoPackage rec {
     name = "kbfs-${version}";
  -  version = "2.1.1";
  +  version = "2.5.0";
   
     goPackagePath = "github.com/keybase/kbfs";
     subPackages = [ "kbfsfuse" "kbfsgit/git-remote-keybase" ];
  
positive.code:     owner = "keybase";
      repo = "kbfs";
      rev = "v${version}";
      sha256 = "1s1bgi9hcilz2is8w2kkvzi928i7w6m5j2x8avkb8zl9s3mrqz3q";
    };
  
    buildFlags = [ "-tags production" ];
  
negative.code:     description = "The Keybase FS FUSE driver";
      platforms = platforms.linux;
      maintainers = with maintainers; [ bennofs np ];
      license = licenses.bsd3;
    };
  }
  