Get rid of an otherwise unused module-level variable (HOST_MACHINE), and
show the relevant file (reflink.py) in the error message:
Traceback (most recent call last):
File "/usr/bin/qubesd", line 2, in <module>
from qubes.tools.qubesd import main
File "/usr/lib/python3.8/site-packages/qubes/__init__.py", line 801, in <module>
from qubes.app import Qubes
File "/usr/lib/python3.8/site-packages/qubes/app.py", line 64, in <module>
import qubes.storage.reflink
File "/usr/lib/python3.8/site-packages/qubes/storage/reflink.py", line 46, in <module>
FICLONE = {
KeyError: 'armv7l'
qubesd.service: Main process exited, code=exited, status=1/FAILURE
c56f06166b