_zimfw_version_check() {
  if [[ ${1} -ne 0 || ! -f ${_zversion_target} ]]; then
    # Get latest version (get all `v*` tags from repo, delete `*v` from beginning,
    # sort in descending `O`rder `n`umerically, and get the `[1]` first)
    local tags
    tags=$(command git ls-remote --tags --refs https://github.com/zimfw/zimfw.git 'v*') || return 1
    >! ${_zversion_target} <<<${${(On)${(f)tags}##*v}[1]} || return 1
  fi
  local -r zlatest_version=$(<${_zversion_target})
  if [[ -n ${zlatest_version} && ${_zversion} != ${zlatest_version} ]]; then
    if (( _zprintlevel > 0 )); then
      print -u2 -PR "%F{yellow}Latest zimfw version is %B${zlatest_version}%b. You're using version %B${_zversion}%b. Run %Bzimfw upgrade%b to upgrade.%f"
    fi
    return 1
  fi
}