Auto-tracking the newest Godot/Blender means most nightly runs now build genuinely new multi-GB layers instead of hitting cache, and nothing ever pruned old ones — the runner's disk fills up over successive runs until a push fails. Prune before building, and retry docker push a few times to ride out transient registry 500s. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>