compiz: Disable

It doesn't currently work.
nix-daemon: Run under the default nice level

Running at a low priority is generally bad since it runs the risk of
priority inversions, etc.  It's really the builders that should run
under a different priority (e.g. in their own cgroup).
Stage 1: Use modprobe from kmod instead of module-init-tools

The latter is obsolete.

http://hydra.nixos.org/build/5663799
Speed up application start
Describe where /etc/nix/nix.conf settings come from
Document that extraUsers options apply to root
Don't load nouveau and nvidiafb when using the proprietary nvidia driver
Fix typos, especially those that end up in the NixOS manual
nixos-rebuild: support -vv, -vvv, -vvvv, and -vvvvv
Merge pull request #214 from ivan/typo-fix-1

Fix typos, especially those that end up in the NixOS manual
Merge pull request #215 from ivan/nixos-rebuild-vvvvv

nixos-rebuild: support -vv, -vvv, -vvvv, and -vvvvv
Merge pull request #212 from ivan/nix-conf-header

Describe where /etc/nix/nix.conf settings come from
Merge pull request #213 from ivan/extraUsers-root

Document that extraUsers options apply to root
Subversion repos stopped updating last year
Explain how to use /my/sources with nix-env, not just nixos-rebuild
Merge pull request #216 from ivan/hacking-on-nixos

"Hacking on NixOS": Explain how to use /my/sources with nix-env
try to fix zfs into initrd