#!/usr/bin/env zsh

equery list '*'  | cut -d " " -f 5 | cut -d: -f 1 | \
while read line; do
  DEP=$(echo "$(equery depends $line | wc -l) - 1" | bc)
  if [[ $DEP == -1 ]]; then
    echo $line
  fi
done #< /var/lib/portage/world