#!/bin/sh

# Checkout our nixpkg tree
NIXREPO=/etc/nixos/oxdi
mkdir -p $NIXREPO
cd $NIXREPO
git clone https://github.com/oxdi/nixpkgs.git

# Update and initialize our new configuration
nixos-rebuild -I nixos=$NIXREPO/nixos -I nixpkgs=$NIXREPO/nixpkgs switch

# Cleanup any previous generations and delete old packages that can be
# pruned.
for x in `seq 0 2` ; do
    nix-env --delete-generations old
    nix-collect-garbage -d
done

# Zero out the disk (for better compression)
dd if=/dev/zero of=/EMPTY bs=1M
rm -rf /EMPTY