anchor.diff:        --prefix XDG_DATA_DIRS : "${librsvg}/share"
         --prefix XDG_DATA_DIRS : "${shared-mime-info}/share"
       )
  +  '';
  +
  +  postFixup = ''
  +    # Cannot be in postInstall, otherwise _multioutDocs hook in preFixup will move right back.
  +    moveToOutput "share/doc" "$devdoc"
     '';
   
     passthru = {
  
positive.code: , libportal-gtk3
  , gnome
  , gtk3
  , glib
  , gsettings-desktop-schemas
  , adwaita-icon-theme
  , gnome-desktop
  , lcms2
  , gdk-pixbuf
  
negative.code:     exempi
      gsettings-desktop-schemas
      shared-mime-info
    ];
  
    mesonFlags = [
      "-Dgtk_doc=true"
    ];
  
    preFixup = ''
      gappsWrapperArgs+=(
  