Restic 0.9.0 check fills up my "/tmp/" partition

First of all congratulations for this magnificent piece of software! It’s a great discover!

I’m checking the shiny new feature “check” of the 0.9.0 release. Like the developer says, it creates a dir in a temp directory in order to not stress remote backend with petitions. My problem is that “/tmp/” partition only has 5GB size, and my remote repo ~800GB. What happens? restic fills up “/tmp” partition because it creates a temporary directory > 5G:

# ./restic_0.9.0_linux_amd64 check
using temporary cache in /tmp/restic-check-cache-260276770
repository 36ab3d95 opened successfully, password is correct
create exclusive lock for repository
load indexes
check all packs
check snapshots, trees and blobs
[...]

And my question is: would be possible to specify this temporary directory in another location?