#!/usr/bin/env zsh
emulate -L zsh

typeset job="nightly backup"
typeset prefix=nightly
print -r -- "job=$job"

typeset -i tries=3
typeset log="${prefix}_backup-${tries}.log"
print -r -- "tries=$tries"
print -r -- "log=$log"

export MODE=staging
zsh -fc 'print -r -- "child=$MODE"'

unset MODE
print -r -- "after=${MODE-unset}"