diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..39a36bb
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,36 @@
+{
+  description = "My NixOS Configurations Flake";
+
+  inputs = {
+    # Source: https://github.com/NixOS/nixpkgs
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    nixpkgs-old.url = "github:nixos/nixpkgs/nixos-24.11";
+    nixpkgs-latest.url = "github:nixos/nixpkgs";
+
+    # Source: https://github.com/nix-community/home-manager
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    # Source: https://github.com/NixOS/nixos-hardware
+    nixos-hardware.url = "github:nixos/nixos-hardware";
+
+    # Source: https://github.com/Mic92/sops-nix
+    sops-nix.url = "github:mic92/sops-nix";
+  };
+
+  outputs =
+    {
+      nixpkgs,
+      nixpkgs-old,
+      nixpkgs-latest,
+      ...
+    }@inputs:
+    let
+      #
+    in
+    {
+      #
+    };
+}
diff --git a/lib/config.nix b/lib/config.nix
new file mode 100644
index 0000000..601c7ad
--- /dev/null
+++ b/lib/config.nix
@@ -0,0 +1,88 @@
+{
+  inputs,
+  nixpkgs,
+  nixpkgs-old,
+  nixpkgs-latest,
+}:
+deviceName:
+{
+  hostName,
+  userName,
+  additionalOverlays ? [ ],
+  systemArch ? builtins.currentSystem,
+}:
+let
+  inherit (nixpkgs) lib;
+
+  customFunctions = import ./utils.nix { inherit lib; };
+
+  baseOverlays =
+    import ../overlays {
+      inherit
+        systemArch
+        nixpkgs-old
+        nixpkgs-latest
+        packagesConfig
+        ;
+    }
+    |> builtins.attrValues;
+  overlays = baseOverlays ++ additionalOverlays;
+
+  DeviceConfig = ../devices/${deviceName};
+  HostConfig = ../users/${hostName}/host;
+  HomeConfig = ../users/${userName}/home;
+
+  userData = import ../users/${userName}/data.nix {
+    inherit
+      deviceName
+      hostName
+      userName
+      systemArch
+      ;
+  };
+
+  userPackagesConfig = import ../users/${hostName}/packages-config.nix { inherit lib; };
+
+  additionalArgs = { inherit inputs customFunctions userData; };
+
+  sops = {
+    defaultSopsFormat = "yaml";
+    defaultSopsFile = ../secrets/main.yaml;
+    age.keyFile = "${userData.paths.sopsKeyFile}";
+  };
+in
+lib.nixosSystem {
+  system = systemArch;
+  specialArgs = additionalArgs;
+
+  modules = [
+    DeviceConfig
+    HostConfig
+
+    {
+      nixpkgs = {
+        inherit overlays;
+        config = userPackagesConfig;
+      };
+    }
+
+    inputs.home-manager.nixosModules.home-manager
+    {
+      home-manager = {
+        users.${userName} = import HomeConfig;
+        useGlobalPkgs = true;
+        useUserPackages = true;
+        extraSpecialArgs = additionalArgs;
+        sharedModules = [
+          inputs.sops-nix.homeManagerModules.sops
+        ];
+      };
+    }
+
+    inputs.sops-nix.nixosModules.sops
+    {
+      inherit sops;
+      home-manager.users.${userName} = { inherit sops; };
+    }
+  ];
+}
diff --git a/lib/utils.nix b/lib/utils.nix
new file mode 100644
index 0000000..02d0723
--- /dev/null
+++ b/lib/utils.nix
@@ -0,0 +1,51 @@
+# This function is copied from:
+# https://github.com/yunfachi/nypkgs/blob/master/lib/umport.nix
+#
+# !!! REMOVING THIS NOTICE VIOLATES THE MIT LICENSE OF THE UMPORT PROJECT !!!
+# This notice must be retained in all copies of this function, including modified versions!
+# The MIT License can be found here:
+# https://github.com/yunfachi/nypkgs/blob/master/LICENSE
+
+{ lib, ... }:
+let
+  umport =
+    inputs@{
+      path ? null,
+      paths ? [ ],
+      include ? [ ],
+      exclude ? [ ],
+      recursive ? true,
+    }:
+    with lib;
+    with fileset;
+    let
+      excludedFiles = filter (path: pathIsRegularFile path) exclude;
+      excludedDirs = filter (path: pathIsDirectory path) exclude;
+      isExcluded =
+        path:
+        if elem path excludedFiles then
+          true
+        else
+          (filter (excludedDir: lib.path.hasPrefix excludedDir path) excludedDirs) != [ ];
+    in
+    unique (
+      (filter
+        (file: pathIsRegularFile file && hasSuffix ".nix" (builtins.toString file) && !isExcluded file)
+        (
+          concatMap (
+            _path:
+            if recursive then
+              toList _path
+            else
+              mapAttrsToList (
+                name: type: _path + (if type == "directory" then "/${name}/default.nix" else "/${name}")
+              ) (builtins.readDir _path)
+          ) (unique (if path == null then paths else [ path ] ++ paths))
+        )
+      )
+      ++ (if recursive then concatMap (path: toList path) (unique include) else unique include)
+    );
+in
+{
+  scan = umport;
+}