diff --git a/definitions/nixos64/configuration.nix b/definitions/nixos64/configuration.nix
new file mode 100644
index 0000000..31b1807
--- /dev/null
+++ b/definitions/nixos64/configuration.nix
@@ -0,0 +1,39 @@
+{ config, pkgs, ... }:
+{
+  require = [ ./hardware-configuration.nix ];
+  boot = {
+    loader.grub.device   = "/dev/sda";
+  };
+  environment.systemPackages = with pkgs; [ git ruby rubygems gnumake gcc ];
+  fileSystems = [ { mountPoint = "/"; label = "nixos"; } ];
+  security.sudo.configFile =
+    ''
+      Defaults:root,%wheel env_keep+=LOCALE_ARCHIVE
+      Defaults:root,%wheel env_keep+=NIX_PATH
+      Defaults:root,%wheel env_keep+=TERMINFO_DIRS
+      Defaults env_keep+=SSH_AUTH_SOCK
+      Defaults lecture = never
+      root   ALL=(ALL) SETENV: ALL
+      %wheel ALL=(ALL) NOPASSWD: ALL, SETENV: ALL
+    '';
+  services = {
+    dbus.enable       = true;
+    openssh.enable    = true;
+  };
+  users = {
+    extraGroups = [ { name = "vagrant"; } { name = "vboxsf"; } ];
+    extraUsers  = [ {
+      description     = "Vagrant User";
+      name            = "vagrant";
+      group           = "vagrant";
+      extraGroups     = [ "users" "vboxsf" "wheel" ];
+      password        = "vagrant";
+      home            = "/home/vagrant";
+      createHome      = true;
+      useDefaultShell = true;
+      openssh.authorizedKeys.keys = [
+        "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== vagrant insecure public key"
+      ];
+    } ];
+  };
+}
diff --git a/definitions/nixos64/definition.rb b/definitions/nixos64/definition.rb
new file mode 100644
index 0000000..b746203
--- /dev/null
+++ b/definitions/nixos64/definition.rb
@@ -0,0 +1,50 @@
+iso = {
+  :url => 'http://nixos.org/releases/nixos/nixos-0.2pre4587_9000fd8-cfbdb33/nixos-minimal-0.2pre4587_9000fd8-cfbdb33-x86_64-linux.iso',
+  :md5  => 'f61180f387e72ee85b8f68273e5ff884',
+}
+
+session = {
+  :boot_cmd_sequence =>
+  [
+   '<Enter>', '<Wait>'*15,
+   'root',                                              '<Enter>',
+   'stop sshd',                                         '<Enter>', # Make sure we don't accept connections until reboot
+   'fdisk /dev/sda',                                    '<Enter>',
+   'n',                                                 '<Enter>'*5,
+   'a',                                                 '<Enter>',
+   '1',                                                 '<Enter>',
+   'w',                                                 '<Enter>',
+   'mkfs.ext4 -j -L nixos /dev/sda1',                   '<Enter>',
+   'mount LABEL=nixos /mnt',                            '<Enter>',
+   'nixos-option --install',                            '<Enter>',
+   'curl http://%IP%:%PORT%/configuration.nix > /mnt/etc/nixos/configuration.nix &&', '<Enter>',
+   'nixos-install &&',                                  '<Enter>',
+   'reboot',                                            '<Enter>',
+  ],
+  :boot_wait            => '5',
+  :cpu_count            => '1',
+  :disk_format          => 'VDI',
+  :disk_size            => '20400',
+  :hostiocache          => 'off',
+  :iso_download_timeout => '1000',
+  :iso_file             => File.basename(iso[:url]),
+  :iso_md5              => iso[:md5],
+  :iso_src              => iso[:url],
+  :kickstart_file       => 'configuration.nix',
+  :kickstart_port       => '7122',
+  :kickstart_timeout    => '10000',
+  :memory_size          => '256',
+  :os_type_id           => 'Linux26',
+  :postinstall_files    => [ 'postinstall.sh' ],
+  :postinstall_timeout  => '10000',
+  :shutdown_cmd         => 'shutdown -h now',
+  :ssh_guest_port       => '22',
+  :ssh_host_port        => '7222',
+  :ssh_key              => '',
+  :ssh_login_timeout    => '10000',
+  :ssh_password         => 'vagrant',
+  :ssh_user             => 'vagrant',
+  :sudo_cmd             => "sudo '%f'"
+}
+
+Veewee::Definition.declare session
diff --git a/definitions/nixos64/postinstall.sh b/definitions/nixos64/postinstall.sh
new file mode 100755
index 0000000..6e3e215
--- /dev/null
+++ b/definitions/nixos64/postinstall.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# Remove VirtualBox Guest Additions ISO that the Veewee put in our
+# home dir
+
+rm -f ~/*.iso
+
+# Install chef & puppet
+
+su - vagrant -c 'gem install chef puppet --user-install \
+  --bindir=$HOME/bin --no-rdoc --no-ri'
+
+# Make sure we are totally up to date
+
+nixos-rebuild --upgrade 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