anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "elementary-dock";
  -  version = "unstable-2021-07-16";
  +  version = "unstable-2021-11-08";
   
     outputs = [ "out" "dev" ];
   
  
positive.code:   src = fetchFromGitHub {
      owner = "elementary";
      repo = repoName;
      rev = "05fd6fccdf1a769f6737a0d7e57e092825348660";
      sha256 = "0lqqq5cx0kk8y7qyjx7z2k3v1kw2xxzns968ianarcji19wzcns4";
    };
  
    nativeBuildInputs = [
  
negative.code: { lib
  , stdenv
  , fetchFromGitHub
  , vala
  , atk
  