Looking through the help, I see that the install defaults to your processor architecture; but if you have a 64-bit OS and only 32-bit package is available, it will fall back. So how can you tell which one you're getting (ideally without installing)? Also, will x86 package names always end in x86
?
Using --checksum64
somehow might work, but I haven't been able to get that to work yet. FWIW, there's a force x86 install option, but there doesn't seem to be one to force x64.