refactor(flake): move nixos configs into flake

configs/default.nix

@@ -1,51 +0,0 @@
-{
-  inputs,
-  lib,
-  hostname,
-  type,
-  modulesPath,
-  ...
-}:
-{
-  imports = builtins.concatLists [
-    # Common options for all machines.
-    [
-      (modulesPath + "/installer/scan/not-detected.nix")
-      ./boot.nix
-      ./bootloaders/systemd-boot.nix
-      ./networking.nix
-      ./nix-config.nix
-      ./security.nix
-      ./shell.nix
-      ./users.nix
-    ]
-    # Options for graphical systems.
-    (lib.optionals (type == "desktop") [
-      ./graphical.nix
-    ])
-    # Options for specific hostnames.
-    (lib.optionals (hostname == "nemesis") [
-      ./filesystems/hw-nemesis.nix
-      # (import ./filesystems/impermanence.nix {
-      #   inherit inputs lib;
-      #   device = "nvme-nvme.c0a9-323332354536453737343334-435432303030503353534438-00000001";
-      # })
-      ./hardware/cpu_amd.nix
-      ./hardware/nvidia.nix
-    ])
-    (lib.optionals (hostname == "mellinoe") [
-      (import ./filesystems/impermanence.nix {
-        inherit inputs lib;
-        device = "/dev/disk/by-id/nvme-eui.01000000000000008ce38e04019a68ab";
-      })
-      ./hardware/cpu_intel.nix
-    ])
-    (lib.optionals (hostname == "apollo") [
-      (import ./filesystems/impermanence.nix {
-        inherit inputs lib;
-        device = "/dev/disk/by-id/nvme-eui.002538d221b47b01";
-      })
-      ./hardware/cpu_intel.nix
-    ])
-  ];
-}

flake.nix

@@ -5,6 +5,12 @@
       ...
     }@inputs:
     let
+      inherit (inputs.nixpkgs) lib;
+      mkDiskConfig = device: {
+        imports = [
+          (import ./modules/filesystems/impermanence.nix { inherit inputs lib device; })
+        ];
+      };
       mkSystem = type: hostname: {
         name = "${hostname}";
         value =
@@ -20,16 +26,47 @@
           in
           inputs.nixpkgs.lib.nixosSystem {
             specialArgs = args;
-            modules = [
+            modules = builtins.concatLists [
-              ./configs
+              # Common options for all machines.
+              [
+                ./modules/boot.nix
+                ./modules/bootloaders/systemd-boot.nix
+                ./modules/networking.nix
+                ./modules/nix-config.nix
+                ./modules/security.nix
+                ./modules/shell.nix
+                ./modules/users.nix
+              ]
+              # Options for graphical systems.
+              (lib.optionals (type == "graphical") [
+                ./modules/graphical.nix
+              ])
+              # Options for specific hostnames.
+              (lib.optionals (hostname == "nemesis") [
+                # mkDiskConfig
+                # "nvme-nvme.c0a9-323332354536453737343334-435432303030503353534438-00000001"
+                ./modules/filesystems/hw-nemesis.nix
+                ./modules/hardware/cpu_amd.nix
+                ./modules/hardware/nvidia.nix
+              ])
+              (lib.optionals (hostname == "mellinoe") [
+                mkDiskConfig
+                "/dev/disk/by-id/nvme-eui.01000000000000008ce38e04019a68ab"
+                ./modules/hardware/cpu_intel.nix
+              ])
+              (lib.optionals (hostname == "apollo") [
+                mkDiskConfig
+                "/dev/disk/by-id/nvme-eui.002538d221b47b01"
+                ./modules/hardware/cpu_intel.nix
+              ])
             ];
           };
       };
     in
     {
       nixosConfigurations = builtins.listToAttrs [
-        (mkSystem "desktop" "nemesis")
+        (mkSystem "graphical" "nemesis")
-        (mkSystem "desktop" "mellinoe")
+        (mkSystem "graphical" "mellinoe")
         (mkSystem "headless" "apollo")
       ];
     };

modules/boot.nix

@@ -1,5 +1,8 @@
-{ pkgs, ... }:
+{ pkgs, modulesPath, ... }:
 {
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
   boot = {
     loader = {
       timeout = 5;