Does guix remount /gnu/store when on another partition?

[dian_cecht]

Hello,

     I was wondering whether, if I put /gnu (or /gnu/store) on a seperate
partition, Guix would (re)mount the partition ro/rw as needed. I know the store
is supposed to be read-only (unless guix-daemon is making a change), but I
wanted to know if it handed this specific case or if it was only ever a simple
permissions change.