```
containers.bla = {
  config = <...>;
};
```
builds fine, but the container won't start (`/nix/store/78v9zzilbkb3z9dsw49pmf5cf1sg4h7v-container-init: line 29: /nix/var/nix/profiles/system/init: No such file or directory`). Upon inspection, the container root is almost empty:
```
> find /var/lib/containers/bla -type f
/var/lib/containers/bla/etc/os-release
/var/lib/containers/bla/etc/localtime
/var/lib/containers/bla/etc/resolv.conf
/var/lib/containers/bla/etc/machine-id
```
Any idea why my declarative containers are empty? Am I doing something wrong?