Trying out nixos 14.12 in vagrant

nixos-14.12-vagrant

# The vagrant box provided by @zimbatm is still on 14.02. Follow
# this recipe to update the machine to 14.12
#
# Make sure you have a recent version of `vagrant` (https://www.vagrantup.com) 
# and virtualbox.

mkdir nixos-test
cd nixos-test
vagrant init zimbatm/nixbox64   # creates Vagrantfile
vagrant up                      # brings up the box

# ... wait ...

vagrant ssh

# --- inside the vagrant machine

sudo nix-channel --list
sudo nix-channel --remove nixos
sudo nix-channel --add http://nixos.org/channels/nixos-14.12 nixos
sudo nixos-rebuild switch --upgrade
sudo reboot    # switch to the new kernel

# you can now add packages in /etc/nixos/configuration.nix
# and run `sudo nixos-rebuild switch`
#
# You can also install packages imperatively using `sudo nix-env -i <package-name>`
#
# To find the name of a package use `sudo nix-env -Paq` like so:
#
# sudo nix-env -Paq | grep git