buildx failed with: ERROR: failed to solve: process "/bin/sh -c sed -i '/bookworm-updates/ s/$/ bookworm-proposed-updates/' /etc/apt/sources.list.d/debian.sources && printf \"Package: *\\nPin: release a=proposed-updates\\nPin-Priority: 100\\n\\n\" > /etc/apt/preferences.d/proposed-updates && printf \"Package: reprepro\\nPin: release a=proposed-updates\\nPin-Priority: 500\\n\" >> /etc/apt/preferences.d/proposed-updates && apt-get update && apt-get install -y -f --no-install-recommends binfmt-support bzip2 mmdebstrap arch-test apt-utils dosfstools dpkg-dev gettext-base git mtools parted python3 python3-distutils quilt qemu-user-static reprepro sudo unzip git-buildpackage pristine-tar sbuild schroot zstd umoci skopeo python3-botocore debootstrap && rm -rf /var/log/* /tmp/* /var/tmp/* /var/cache/ldconfig/aux-cache && sbuild-adduser builder && sed -i 's|# kas-isar: ||g' /container-entrypoint" did not complete successfully: exit code: 100

The job was canceled because "kas-isar" failed.