# Check for AWS.
# AWS on Xen.
-if echo "$dmi" | grep -q 'Version: [0-9]\.[0-9]\.amazon'; then
+if echo "$dmi" | grep -Eq 'Version: [0-9]+\.[0-9]+\.amazon'; then
echo aws
# AWS on baremetal or KVM.
elif echo "$dmi" | grep -q 'Vendor: Amazon EC2'; then