Change Nix-Build's TMPDIR From Shell.nix
Fleeting- External reference: https://stackoverflow.com/questions/72929271/change-nix-builds-tmpdir-from-shell-nix
To do that on my system I created a /etc/systemd/system/nix-daemon.service.d/override.conf with:
[Service] Environment=TMPDIR=/var/tmp/nix-daemon
— https://stackoverflow.com/questions/72929271/change-nix-builds-tmpdir-from-shell-nix