Composefs mismatch when built with buildah Github action, but not when built locally via podman

Hi, an experimental proof-of-concept build pipeline of a sealed arch-bootc image fails with a composefs mismatch, when I try to install it to filesystem. Repo with build pipeline via Github action and usage of buildah-build: https://github.com/PhysicsIsAwesome/arch-bootc-sealed Updating bootc-dev-actions/bootc-ubuntu-setup@main to get packages from the latest Ubuntu 26.04 did not help. Surprisingly, if I build the same containerfiles locally with podman on Arch, writing it to filesystem works without issues. Justfile for writing to filesystem: ```Justfile write-to-fs $image_name="ghcr.io/physicsisawesome/arch-bootc-sealed": #!/usr/bin/env bash umount /mnt/archbootc/boot || echo "not mounted" umount /mnt/archbootc || echo "not mounted" cryptsetup open /dev/vdc2 my-luks mount -o subvol=@ /dev/mapper/my-luks /mnt/archbootc mkdir /mnt/archbootc/boot mount /dev/vdc1 /mnt/archbootc/boot rm -rf /mnt/archbootc/ || echo "ok" podman pull ${image_name} podman run --rm --privileged --pid=host -v /:/target -v /dev:/dev -v /var/lib/containers:/var/lib/containers -e RUST_LOG=debug ${image_name} bootc install to-filesystem --composefs-backend --bootloader systemd --boot-mount-spec UUID=A775-A613 /target/mnt/archbootc umount /mnt/archbootc/boot umount /mnt/archbootc ``` Log for `write-to-fs`: https://pastebin.com/ebM6brJ7