anchor.diff:  { lib, stdenv
   , gettext
   , fetchurl
  +, fetchpatch
   , wrapGAppsHook
   , gnome-video-effects
   , libcanberra-gtk3
  
positive.code: , docbook_xsl
  , appstream-glib
  , libxslt
  , yelp-tools
  , gnome-common
  , gtk-doc
  , adwaita-icon-theme
  
negative.code:     python3
      vala
      wrapGAppsHook
    ];
  
    buildInputs = [
  