:local version [system package get system value-name=version];
:local archs [:toarray "arm,smips,mipsbe"];
:foreach arch in=$archs do={
               /tool fetch url="https://download.mikrotik.com/routeros/$version/routeros-$arch-$version.npk" mode=https dst-path="/disk1/upd/routeros-$arch-$version.npk" keep-result=yes
}