Morover, iocage jail util supports only FreeBSD RELEASES
I’m using the fork of original iocage called iocell. From man iocell:
create [-e] [base=[RELEASE|NAME]] [property=value] [property=value]
[count=value]
By default create will deploy a new jail based on the host operating
systems release. This can be changed by specifying the base option.
By default a basejail is created that has a common shared base.
The -e switch will create an empty jail which can be used for unsupported
or custom jails.
Yeha!