NixOS running in Docker. In development - not for production.
docker build --build-arg nixuser=`whoami` -t nixos:17.03_testing0 -f NixOS .
docker run -dit --cap-add SYS_ADMIN -v /sys/fs/cgroup:/sys/fs/cgroup:ro nixos:17.03_testing0
docker exec -it <container_id> /var/run/current-system/sw/bin/bash