Redundant directory creation in ephemeral-btrfs.nix

[breezeight]

I was looking at the ephemeral-btrfs module. I see you ensure needed directories exists:

nix-config/hosts/common/optional/ephemeral-btrfs.nix

Lines 13 to 14 in ec4bd49

	echo "Creating needed directories"
	mkdir -p "$MNTPOINT"/persist/var/{log,lib/{nixos,systemd}}

But as far I understand the impermanence module included in optin-persistence.nix should

nix-config/hosts/common/global/optin-persistence.nix

Lines 11 to 20 in ec4bd49

	environment.persistence = {
	"/persist" = {
	directories = [
	"/var/lib/systemd"
	"/var/lib/nixos"
	"/var/log"
	"/srv"
	];
	};
	};

Does it make sense to ephemeral-btrfs.nix removing the above lines?