Boot from ArchLinux ISO
curl -s https://eoli3n.github.io/archzfs/init | bash
zpool import storage
dd if=/dev/nvme0n1 bs=256M | zstd -19 -T11 --sparse > /storage/archwks.img.zst
zstd -t /storage/archwks.img.zst

For making a copy of qcow2, cleans up churn growth:
qemu-img convert -O qcow2 win10-2.qcow2 win10.qcow2