On Sat, 2 May 2020 02:48:00 +0200
raingloom <raingloom@riseup.net> wrote:

> What seemed to work but then didn't:
> installing to a partition specified by its label. i tried to do the
> math, but for some reason it still can't find it. I'm pretty sure it
> worked at some point.

Please try:

$ guile --no-auto-compile -L .
((@@ (gnu build file-systems) f2fs-superblock-volume-name)
 ((@@ (gnu build file-systems) read-f2fs-superblock) "your-device"))