anchor.diff:  # some loss of functionality because of it.
   
   python3Packages.buildPythonApplication rec {
  -  version = "2021-07-09";
     pname = "tahoe-lafs";
  -  namePrefix = "";
  +  version = "unstable-2021-07-09";
   
     src = fetchFromGitHub {
       owner = "tahoe-lafs";
  
positive.code:       such a way that it remains available even when some of the peers
        are unavailable, malfunctioning, or malicious.
      '';
      homepage = "http://tahoe-lafs.org/";
      license = [ lib.licenses.gpl2Plus /* or */ "TGPPLv1+" ];
      maintainers = with lib.maintainers; [ MostAwesomeDude ];
      platforms = lib.platforms.gnu ++ lib.platforms.linux;
    };
  }
  
negative.code:     trial --rterrors allmydata
    '';
  
    meta = with lib; {
      description = "Tahoe-LAFS, a decentralized, fault-tolerant, distributed storage system";
      longDescription = ''
        Tahoe-LAFS is a secure, decentralized, fault-tolerant filesystem.
  