nit: cleanup imports

modules/age-secrets.nix

@@ -2,9 +2,14 @@
   config,
   lib,
   pkgs,
+  inputs,
   ...
 }:
 {
+  imports = [
+    inputs.agenix.nixosModules.default
+  ];
+
   # Configure all agenix secrets
   age.secrets = {
     # ZFS encryption key

modules/impermanence.nix

@@ -4,9 +4,14 @@
   pkgs,
   username,
   service_configs,
+  inputs,
   ...
 }:
 {
+  imports = [
+    inputs.impermanence.nixosModules.impermanence
+  ];
+
   environment.persistence."/persistent" = {
     hideMounts = true;
     directories = [