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Build SilverMetal Linux ISO (reproducibility-gated) / build-and-verify (push) Failing after 2m20s
Run #4257 cleared sanity-tests entirely (sq-git verification of every submodule signature: ✅; tag/uncommitted relaxation: ✅) and reached 1200_prepare-build-machine, where it died: + sudo systemctl daemon-reload sudo: systemctl: command not found ERROR detected in script!: ././build-steps.d/1200_prepare-build-machine derivative-maker assumes systemd is PID 1 on the build host. Upstream's own container (linux/build/derivative-maker/docker/) runs systemd-as-init via an entrypoint that masks irrelevant units and declares its own. We don't want that surgery for M1.1 — it pulls in cgroup mounts, --cgroupns=host, and a much bigger debugging surface. Shim approach instead: install /usr/local/bin/systemctl that logs the attempt to stderr and exits 0. /usr/local/bin precedes /usr/bin in both default $PATH and sudo's secure_path, so it satisfies any systemctl call regardless of whether the real binary later gets pulled in by a package install. Standard pattern for systemd-aware Debian build scripts in transient containers. Risk if it doesn't suffice: the shim makes daemon-reload / restart / mask calls succeed, but doesn't actually run any service. If a later build step depends on (say) approx actually being up to serve cached debs, we'll see the next failure and decide whether to escalate to real systemd-in-container or skip the relevant build step. Changes: - Dockerfile.builder: add the shim with a brief log line to stderr; comment block documents the trade-off. - build.sh: BUILDER_IMAGE digest re-pinned to sha256:70f160ab…5460 (built natively on 10.0.0.51, shim verified working with `docker run … systemctl daemon-reload` returning 0). Verified: shim emits "systemctl-shim: daemon-reload" to stderr and exits 0. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>