"Permission denied" until I run "restart nfs-kernel-exports". "exportfs -ra" did not help.
I tracked that down to some race condition between loading the module nfsd and
starting the daemons. Therefore, I decided to add nfsd to the boot.kernelModules instead
of using modprove with it.
Now it works for my server. No more Permission denied after reboot.
svn path=/nixos/trunk/; revision=31113