post_install() {
    getent passwd nxt &>/dev/null || {
        echo -n ">>> Creating nxt user... "
        useradd --system --user-group --home /opt/nxt nxt
        echo "done"
    }
    chown -R nxt:nxt /opt/nxt
}

post_upgrade() {
    chown -R nxt:nxt /opt/nxt
}

pre_remove() {
    getent passwd nxt &>/dev/null && {
        echo -n ">>> Removing nxt user... "
        userdel nxt
        echo "done"
    }
}