Missing strongswan-mod packages

Hi!
I use image builder for creating a custom image for D-Link DIR-835.
In the latest snapshot the packages "strongswan-mod-gmp strongswan-mod-hmac strongswan-mod-kernel-netlink strongswan-mod-nonce strongswan-mod-random strongswan-mod-sha1 strongswan-mod-sha2 strongswan-mod-socket-default" are missing.

Unknown package 'strongswan-mod-gmp'.
Unknown package 'strongswan-mod-hmac'.
Unknown package 'strongswan-mod-kernel-netlink'.
Unknown package 'strongswan-mod-nonce'.
Unknown package 'strongswan-mod-random'.
Unknown package 'strongswan-mod-sha1'.
Unknown package 'strongswan-mod-sha2'.
Unknown package 'strongswan-mod-socket-default'.