post_install() {
  # run dirmngr once to create /root/.gnupg
  # https://bugs.archlinux.org/task/47371
  # https://bugs.archlinux.org/task/42798
  dirmngr </dev/null &>/dev/null
}

post_upgrade() {
  local unit

  if (( $(vercmp "$2" '2.2.37-1') < 0)); then
    for unit in {dirmngr,gpg-agent{,-{browser,extra,ssh}}}.socket; do
      rm -f "/etc/systemd/user/sockets.target.wants/$unit"
    done
    printf "NOTE: GnuPG's systemd sockets are now enabled in the vendor location /usr/lib/systemd/user/!\n"
  fi
}