extraCommands in buildLayeredImage can't access store paths from
contents (they're in separate layers), so the glob matched nothing.
Instead, create a wrapper entrypoint that symlinks built-in blueprint
dirs from the Nix store into /blueprints at container start. The
directory is created world-writable so user 65534 can create links.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>