{ ... }: { # root is a tmpfs so that we have an ephemeral system ("impermanence" handles the state) fileSystems."/" = { device = "none"; fsType = "tmpfs"; options = [ "mode=755" "size=1G" "defaults" ]; }; fileSystems."/nix" = { device = "/dev/disk/by-uuid/1f1271f8-53ce-4081-8a29-60a4a6b5d6f9"; fsType = "btrfs"; options = [ "compress=zstd" "defaults" ]; }; fileSystems."/boot" = { device = "/dev/disk/by-uuid/0299-F1E5"; fsType = "vfat"; }; }