anchor.diff:  
     common = opts: callPackage (import ./common.nix opts) {};
   
  +  # Needed on older branches since rustc: 1.32.0 -> 1.33.0
  +  missing-documentation-patch = fetchurl {
  +    name = "missing-documentation.patch";
  +    url = "https://aur.archlinux.org/cgit/aur.git/plain/deny_missing_docs.patch"
  +        + "?h=firefox-esr&id=03bdd01f9cf";
  +    sha256 = "1i33n3fgwc8d0v7j4qn7lbdax0an6swar12gay3q2nwrhg3ic4fb";
  +  };
   in
   
   rec {
  
positive.code:       rev   = "dda14213c550afc522ef0bb0bb1643289c298736";
        sha256 = "0lj79nczcix9mx6d0isbizg0f8apf6vgkp7r0q7id92691frj7fz";
      };
    };
  
    tor-browser = tor-browser-8-0;
  
negative.code: 
      patches = [
        ./no-buildconfig.patch
        missing-documentation-patch
      ];
    };
  
  