Also rename the wifi module file

modules/system/wifi.nix

@@ -0,0 +1,45 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  networks = [
+    "EW90N.psk"
+    "Fairphone4.psk"
+    "WLAN-233151.psk"
+    "DSL_EXT.psk"
+    "eduroam.8021x"
+  ];
+in
+{
+  options.custom.wifi.enable = lib.mkEnableOption "";
+
+  config = lib.mkIf config.custom.wifi.enable (
+    lib.mkMerge (
+      lib.flatten [
+        {
+          networking.wireless.iwd = {
+            enable = true;
+            settings = {
+              General.EnableNetworkConfiguration = true;
+              Settings.AutoConnect = true;
+              Network.NameResolvingService = "resolvconf";
+            };
+          };
+
+          environment.systemPackages = [ pkgs.iwgtk ];
+        }
+
+        (lib.forEach networks (name: {
+          sops.secrets."iwd/${name}" = { };
+
+          systemd.tmpfiles.rules = [
+            "C /var/lib/iwd/${name} - - - - ${config.sops.secrets."iwd/${name}".path}"
+          ];
+        }))
+      ]
+    )
+  );
+}