Refactor flake structure with flake-parts

flake/nixos.nix

@@ -1,42 +1,37 @@
 {
-  rootPath,
-  outputs,
-}: {inputs, ...}: let
+  inputs,
+  lib,
+  self,
+  ...
+}: let
+  rootPath = ./..;
+  inherit (self) outputs;
+  inherit (inputs) nixpkgs;
   defaultNixosModule = import (rootPath + "/nixos/modules");
-  inherit (inputs.nixpkgs) lib;
 in {
   flake = {
     nixosModules.default = defaultNixosModule;
     nixosConfigurations = let
-      nixosConfigDir = rootPath + "/nixos/configurations";
       makeNixConfiguration = hostName:
-        lib.nixosSystem {
+        nixpkgs.lib.nixosSystem {
           modules =
             [defaultNixosModule]
             ++ [
-              (
-                let
-                  dirPath = nixosConfigDir + "/${hostName}";
-                  filePath = nixosConfigDir + "/${hostName}.nix";
-                in
-                  if builtins.pathExists dirPath
-                  then dirPath
-                  else filePath
-              )
+              (rootPath + "/nixos/configurations/${hostName}")
             ];
           specialArgs = {
             inherit inputs outputs rootPath;
           };
         };
     in
-      nixosConfigDir
-      |> builtins.readDir
-      |> builtins.attrNames
-      |> map (f: lib.removeSuffix ".nix" f)
-      |> map (name: {
-        inherit name;
-        value = makeNixConfiguration name;
-      })
-      |> builtins.listToAttrs;
+      [
+        "Tytonidae"
+        "Cape"
+        "Akun"
+      ]
+      |> (
+        with lib;
+          flip genAttrs makeNixConfiguration
+      );
   };
 }