case $THIS_SUB_DEPENDS in
  QT5) is_depends_enabled $SPELL qtbase && return 0;;
  QT6) is_depends_enabled $SPELL qt6base && return 0;;
  XPDF_HEADERS) list_find "$XPDF_HEADERS" "-DENABLE_UNSTABLE_API_ABI_HEADERS=ON" && return 0;;
  *) echo "Eek, unknown subdependency requested!"; return 1;;
esac
return 1
