since a couple days I see the nighly builds failing, see for example https://github.com/vyos/vyos-nightly-build/actions/runs/13175564465/job/36774624417
this seems to be related to recent change of the check-qemu-install script T7125
around lines 810 which is referenced in the (W) (T) (F) of the workflow output it seems to fail on incorrectly splitting on differently used | here. using grep avoids having to rely on this