feat: add initial modules

lib/mkHost.nix

@@ -0,0 +1,54 @@
+{
+  nixpkgs,
+  overlays,
+  inputs,
+}:
+
+name:
+{
+  system,
+  users ? [ ],
+}:
+
+let
+  hostConfig = ../hosts/${name}/configuration.nix;
+  hostHWConfig = ../hosts/${name}/hardware-configuration.nix;
+
+  userHMConfigs = nixpkgs.lib.genAttrs users (
+    user: import ../users/${user}/home-manager.nix { inherit inputs; }
+  );
+
+  gib_in_bytes = 1073741824;
+in
+
+nixpkgs.lib.nixosSystem {
+  inherit system;
+  modules = [
+
+    {
+      nix.settings = {
+        download-buffer-size = 1 * gib_in_bytes;
+        experimental-features = [
+          "nix-command"
+          "flakes"
+        ];
+      };
+    }
+
+    { nixpkgs.overlays = overlays; }
+    { nixpkgs.config.allowUnfree = true; }
+
+    hostConfig
+    hostHWConfig
+
+    inputs.home-manager.nixosModules.home-manager
+    {
+      home-manager.useGlobalPkgs = true;
+      home-manager.useUserPackages = true;
+      home-manager.users = userHMConfigs;
+      home-manager.extraSpecialArgs = { inherit inputs; };
+    }
+
+  ];
+  specialArgs = { inherit inputs; };
+}