Error on zeopack

docker-compose.yml

plone:
  image: plone/plone:4.3.9-alpine
  links:
  - zeoserver
  volumes_from:
  - 'plone_data'
  - 'plone_data_backup'
  environment:
  - ZEO_ADDRESS=zeoserver:8100

plone_data:
  container_name: plone_data
  image: busybox
  volumes:
  - './filestorage:/data/filestorage'
  - './blobstorage:/data/blobstorage'
  command: ['chown', '-R', '500:500', '/data']

plone_data_backup:
  container_name: plone_data_backup
  image: busybox
  volumes:
  - './backups:/data/backups'
  - './blobstoragebackups:/data/blobstoragebackups'
  command: ['chown', '-R', '500:500', '/data']

zeoserver:
  container_name: 'zeoserver'  
  image: plone/plone:4.3.9-alpine
  command: ['zeoserver']

gistfile1.txt

docker-compose run plone bin/backup

Starting plone_data_backup
Starting plone_data
INFO: Please wait while backing up database file: /data/filestorage/Data.fs to /data/backups
INFO: Please wait while backing up blobs from /data/blobstorage to /data/blobstoragebackups
INFO: Renaming blobstorage.0 to blobstorage.1.
INFO: rsync -a  --delete --link-dest=../blobstorage.1 /data/blobstorage /data/blobstoragebackups/blobstorage.0

docker-compose run plone bin/zeopack
Starting plone_data_backup
Starting plone_data
Traceback (most recent call last):
  File "/plone/instance/bin/zeopack", line 40, in <module>
    sys.exit(plone.recipe.zeoserver.pack.main(host, port, unix, days, username, password, realm, blob_dir, storage))
  File "/plone/buildout-cache/eggs/plone.recipe.zeoserver-1.2.8-py2.7.egg/plone/recipe/zeoserver/pack.py", line 58, in main
    _main(*args, **kw)
  File "/plone/buildout-cache/eggs/plone.recipe.zeoserver-1.2.8-py2.7.egg/plone/recipe/zeoserver/pack.py", line 30, in _main
    blob_dir=blob_dir, shared_blob_dir=shared_blob_dir,
  File "/plone/buildout-cache/eggs/ZODB3-3.10.5-py2.7-linux-x86_64.egg/ZEO/ClientStorage.py", line 387, in __init__
    self.fshelper = ZODB.blob.FilesystemHelper(blob_dir)
  File "/plone/buildout-cache/eggs/ZODB3-3.10.5-py2.7-linux-x86_64.egg/ZODB/blob.py", line 336, in __init__
    self.layout = LAYOUTS[layout_name]
KeyError: 'zeocache'