# Pastebin R1CZcj7o
use_nix() {
  eval "$(lorri direnv)"
  ruby -e '`pgrep -xf "lorri watch"`.split.map{|pid| File.read(%(/proc/#{pid.strip}/environ)).scan(/PWD=([^\0]+)/) }.flatten.map{|dir| File.realpath(dir) rescue nil }.include?(Dir.pwd) || exit(1)'
  if [[ $? == 1 ]]; then
    lorri watch 2>/dev/null 1>/dev/null &
    pid=$!
    echo "started lorri watch with pid $pid"
    disown $pid
  fi
}