anchor.diff:  
     mesonFlags = [
       "-Dfedora=false" # not useful in NixOS or for NixOS users.
  -    "-Dgtk_doc=true"
  -    "-Dman=true"
  +    "-Dgoabackend=${lib.boolToString enableBackend}"
  +    "-Dgtk_doc=${lib.boolToString enableBackend}"
  +    "-Dman=${lib.boolToString enableBackend}"
       "-Dmedia_server=true"
     ];
   
  
positive.code:   pname = "gnome-online-accounts";
    version = "3.46.0";
  
    outputs = [ "out" "man" "dev" "devdoc" ];
  
    # https://gitlab.gnome.org/GNOME/gnome-online-accounts/issues/87
    src = fetchFromGitLab {
  
negative.code:   meta = with lib; {
      homepage = "https://wiki.gnome.org/Projects/GnomeOnlineAccounts";
      description = "Single sign-on framework for GNOME";
      platforms = platforms.unix;
      license = licenses.lgpl2Plus;
      maintainers = teams.gnome.members;
    };
  