kumofs package install fail

I tried install kumofs.

Installer tell me about what module to install, I choose "kumo-server" and "kumo-gateway".

                          │ │
                          │ Kumofs components to run on this host: │
                          │ │
                          │ [ ] kumo-manager │
                          │ [*] kumo-server │
                          │ [*] kumo-gateway │
                          │ │

But kumofs didn't install.
Error messages below::

root@devel:/var/run# LANG=C dpkg-reconfigure kumofs
mkdir: cannot create directory `/var/run/kumofs': File exists