- Pin debian:bookworm-slim by real digest (resolved 2026-04-26). - Two-phase install: seed ca-certificates from the default mirror first so HTTPS to snapshot.debian.org works, then swap to the pinned snapshot for the toolchain itself. Slim images don't ship the CA bundle, so the one-shot pinned-source-only install would deadlock on cert verification. Validated locally: image builds clean, 302MB, all live-build / debootstrap / mksquashfs / xorriso / diffoscope-minimal present. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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