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