It looks like setting TMPDIR did not have the desired effect. I still
see a bunch of recent nix-build directories in /tmp.
Let's use the dedicated nix.conf setting, maybe it does do the job.
Change-Id: I17dc1e33bd0f20707adfbf9ad925251ac9aa77a5
Reviewed-on: https://cl.snix.dev/c/snix/+/30171
Autosubmit: Florian Klink <flokli@flokli.de>
Reviewed-by: Ryan Lahfa <masterancpp@gmail.com>
Tested-by: besadii