anchor.diff:      pkg-config
       gettext
       docbook-xsl-nons
  +    docbook_xml_dtd_412
       docbook_xml_dtd_42
  +    docbook_xml_dtd_43
  +    gtk-doc
       perl
       wrapGAppsHook
       sassc
  
positive.code:   pname = "gnome-shell";
    version = "3.36.4";
  
    src = fetchurl {
      url = "mirror://gnome/sources/gnome-shell/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "1nyibrr98ijn65z9ki0k7xzcwcliwy2jqssz0l0jalpbkhnr751d";
  
negative.code: , python3
  , polkit
  , networkmanager
  , gtk-doc
  , docbook-xsl-nons
  , at-spi2-core
  , libstartup_notification
  