[Trigger] Operation = Install Operation = Upgrade Type = Path Target = usr/lib/systemd/boot/efi/systemd-boot*.efi [Action] Description = Signing systemd-boot EFI binary for Secure Boot When = PostTransaction Exec = /bin/sh -c 'while read -r f; do /usr/lib/systemd/systemd-sbsign sign --private-key /etc/kernel/secure-boot-private-key.pem --certificate /etc/kernel/secure-boot-certificate.pem --output "${f}.signed" "$f"; done;' Depends = sh NeedsTargets