postgres 12 -> 16

system-modules/postgres.nix

@@ -1,9 +1,11 @@
-{ config, pkgs, lib, user, ... }:
+{ config, pkgs, lib, ... }:
 {
 	services = {
 		postgresql = {
 			enable = true;
-			package = pkgs.postgresql_12;
+
+			package = pkgs.postgresql_16; # https://stackoverflow.com/questions/51688193/how-to-upgrade-postgresql-in-nixos
+
 			dataDir = "/var/lib/postgresql/${config.services.postgresql.package.psqlSchema}"; # default
 			# identMap = ''
 				# ${user} ${user} ${user}