_zimfw_mv() {
  if command cmp -s ${2} ${1}; then
    if (( ! _zquiet )); then
      print -PR "<%= okay %>%B${2}:%b Already up to date"
    fi
  else
    if [[ -e ${2} ]]; then
      command mv -f ${2}{,.old} || return 1
    fi
    command mv -f ${1} ${2} && \
        if (( ! _zquiet )); then
          print -PR "<%= okay %>%B${2}:%b Updated. Restart your terminal for changes to take effect."
        fi
  fi
}