Fatal: no entropy gathering module detected

[bork]

I'm trying to install Vesta on Ubuntu 14.04 minimal on OpenVZ 2.6.32-5-openvz-amd64 vps.

Setting up exim4-config (4.82-3ubuntu2) ...
Adding system-user for exim (v4)
Fatal: no entropy gathering module detected
Invalid new configfile /var/lib/exim4/config.autogenerated.tmp, not installing
/var/lib/exim4/config.autogenerated.tmp to /var/lib/exim4/config.autogenerated
dpkg: error processing package exim4-config (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of exim4-base:
exim4-base depends on exim4-config (>= 4.30) | exim4-config-2; however:
Package exim4-config is not configured yet.
Package exim4-config-2 is not installed.
Package exim4-config which provides exim4-config-2 is not configured yet.

Any ideas why fail ?

[skurudo]

idea one - exim already installed in your OS, apt-get remove those first.