fix!: make all nixosConfigurations build

Specifically `homix`
- remove manual `home-manager` module definition
Import `(r)agenix` and `agenix-rekey` by default for all `NixOS` configurations
Move `machines.nix` flake module import to `configuration.nix` from `flake.nix`

flake.nix

@@ -148,7 +148,6 @@
 
       imports = [
         ./nix/pkgs.nix
-        ./nix/machines.nix
         ./nix/modules.nix
         ./nix/configurations.nix
         ./nix/agenix.nix

machines/nixos/x86_64-linux/homix/configuration.nix

@@ -205,14 +205,6 @@
     enable = true;
   };
 
-  home-manager = {
-    backupFileExtension = "hm-bak";
-    useUserPackages = true;
-    useGlobalPkgs = false;
-
-    extraSpecialArgs = { inherit inputs outputs; };
-  };
-
   ### Enable plymouth (bootscreen customizations)
   boot.plymouth = {
     enable = true;

machines/nixos/x86_64-linux/jeeves/configuration.nix

@@ -4,8 +4,6 @@
     inputs.hardware.nixosModules.common-cpu-amd
     inputs.hardware.nixosModules.common-gpu-amd
     ./disko.nix
-    inputs.ragenix.nixosModules.default
-    inputs.agenix-rekey.nixosModules.default
     ./network.nix
     ./wireguard.nix
     ./nginx.nix

modules/nixos/agenix-rekey-default/default.nix

@@ -1,11 +1,8 @@
 { inputs, outputs, lib, pkgs, config, options, ... }:
-let
-  # NOTE: synced with <https://github.com/oddlama/agenix-rekey/blob/c071067f7d972552f5170cf8665643ed0ec19a6d/modules/agenix-rekey.nix#L38>
-  dummyPubkey = "age1qyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqszqgpqyqs3290gq";
-in {
-  # TODO: cleaner deep check
-  config = lib.mkIf (lib.all lib.id [(builtins.hasAttr "age" options) (builtins.hasAttr "rekey" options.age)]) {
-    age.rekey = lib.mkIf (config.age.rekey.hostPubkey != dummyPubkey) {
+{
+  config = {
+    # NOTE: `(r)agenix` and `agenix-rekey` modules are imported by `../../../nix/configurations.nix`
+    age.rekey = {
       masterIdentities = lib.mkDefault [ "${inputs.self}/secrets/privkey.age" ];
       storageMode      = lib.mkDefault "local";
       localStorageDir  = lib.mkDefault "${inputs.self}/secrets/rekeyed/${config.networking.hostName}";

nix/agenix.nix

@@ -7,9 +7,7 @@
 
   perSystem = {
     agenix-rekey = {
-      nodes = {
-        inherit (self.nixosConfigurations) jeeves;
-      };
+      nodes = self.nixosConfigurations;
     };
   };
 }

nix/configurations.nix

@@ -1,7 +1,6 @@
 { lib, config, self, inputs, withSystem, ... }:
 
 let
-  # TODO: works?
   outputs = self;
   inherit (import ./utils.nix { inherit lib self; })
     and
@@ -45,6 +44,9 @@ let
       # Home Manager
       inputs.home-manager.nixosModules.home-manager
       (homeManagerModule args)
+      # (r)agenix && agenix-rekey
+      inputs.ragenix.nixosModules.default
+      inputs.agenix-rekey.nixosModules.default
       # nix-topology
       inputs.nix-topology.nixosModules.default
       # Sane default `networking.hostName`
@@ -134,6 +136,10 @@ let
           machines));
 in
 {
+  imports = [
+    ./machines.nix
+  ];
+
   flake = {
     # Configurations
     nixosConfigurations =

nix/topology/default.nix

@@ -50,10 +50,7 @@
     };
   in {
     topology = {
-      nixosConfigurations = {
-        inherit (self.nixosConfigurations)
-          jeeves;
-      };
+      nixosConfigurations = self.nixosConfigurations;
       modules = [
         ({ config, ... }: let
           inherit (config.lib.topology)