The Arista 7150S switch is running 4.16.10M with the following commands issued and the error returns after the 2nd commands.
shkhe92#sh ver
Arista DCS-7150S-52-CL-R
Hardware version: 02.02
Serial number: JPE14451763
System MAC address: 001c.73b4.7be5
Software image version: 4.16.10M
Architecture: i386
Internal build version: 4.16.10M-4126857.41610M
Internal build ID: f8cc0357-f964-4835-ad50-7debf2643f99
Uptime: 1 week, 0 days, 0 hours and 30 minutes
Total memory: 3978076 kB
Free memory: 492804 kB
shkhe92#bash
Arista Networks EOS shell
[swong@shkhe92 ~]$ exit
logout
Copy completed successfully.
shkhe92#extension hsflowd-eos-2.0.9-1.x86_64.rpm
% Error installing hsflowd-eos-2.0.9-1.x86_64.rpm: RPM install error: Transaction failed: package hsflowd-2.0.9-1.x86_64 is intended for a x86_64 architecture
shkhe92#