root@kreppa:/home/archive# apt-get install nfs-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package nfs-server is a virtual package provided by:
  nfs-kernel-server 1:1.2.2-4ubuntu5.1
  unfs3 0.9.22+dfsg-2
You should explicitly select one to install.

E: Package 'nfs-server' has no installation candidate
root@kreppa:/home/archive#