The 20260726.254 runner image update made every podman-using matrix job fail at the first RUN step of the builder image with crun "unknown version specified": newer podman writes OCI configs with a spec version that Ubuntu 24.04's crun 1.14.1 rejects (fixed upstream in 1.14.3, see containers/podman#27272). The previous image build (20260720.247) had a compatible pairing, which is why the exact same tree was green two days ago. Install crun 1.28 from upstream releases right after podman. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>