$ sudo ls -la /nix/var/nix
total 0
drwxr-xr-x  8 root  wheel  256 Aug 24 13:41 .
drwxr-xr-x  4 root  wheel  128 Aug 24 13:41 ..
drwxr-xr-x  6 root  wheel  192 Aug 24 13:41 db
-rw-------  1 root  wheel    0 Aug 24 13:41 gc.lock
drwxr-xr-x  3 root  wheel   96 Aug 24 13:41 gcroots
drwxr-xr-x  6 root  wheel  192 Aug 24 13:41 profiles
drwxr-xr-x  2 root  wheel   64 Aug 24 13:41 temproots
drwxr-xr-x  3 root  wheel   96 Aug 24 13:41 userpool