bug#40447:

[Brendan Tildesley]

Closing since it seems to unrelated. Sorry for wasting your time. I 
think it may have been my ext4 having too many files. i deleted all my 
system generations and gc'd a lot of stuff, and it seems to be miss 
behaving. perhaps it is a different kind of guix bug that it doesnt cope 
with this issue:

[ 7862.196231] EXT4-fs warning (device sdb1): ext4_dx_add_entry:2343: 
Directory (ino: 24903688) index full, reach max htree level :2
[ 7862.196241] EXT4-fs warning (device sdb1): ext4_dx_add_entry:2347: 
Large directory feature is not enabled on this filesystem