Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:

>>                   (list (file-system
>>                           (device (file-system-label "my-root"))
>>                           (mount-point "/")
>> -                         (type "ext4")
>> +                         (type "btrfs")
>> +                         (options "subvol=rootfs,compress=zstd")

By the way in your patch you did not document the syntax (options
"subvol=...").
Is it supported nonetheless in your patch?  Is it supported in current Guix?

-- 
Pierre Neidhardt
https://ambrevar.xyz/