anchor.diff:    buildInputs = [
       granite
       gtk3
  -    libcanberra
       libcanberra-gtk3
       libgee
       pulseaudio
  
positive.code: { lib, stdenv
  , fetchFromGitHub
  , nix-update-script
  , pantheon
  , meson
  
negative.code:   meta = with lib; {
      description = "Switchboard Sound Plug";
      homepage = "https://github.com/elementary/switchboard-plug-sound";
      license = licenses.lgpl21Plus;
      platforms = platforms.linux;
      maintainers = pantheon.maintainers;
    };
  