diff --git a/home/base/gui/rime/default.nix b/home/base/gui/rime/default.nix
index 729a55dc..4c05e030 100644
--- a/home/base/gui/rime/default.nix
+++ b/home/base/gui/rime/default.nix
@@ -1,13 +1,12 @@
 {
   lib,
-  myNurPkgs,
   pkgs,
   ...
 }:
 let
   # flypy (小鹤音形) rime data from nur-ryan4yin (`pkgs/rime-data-flypy`). The
   # package stays pristine; personal preferences live in flypy.custom.yaml.
-  rime-data-flypy = myNurPkgs.rime-data-flypy;
+  rime-data-flypy = pkgs.rime-data-flypy;
   # Personal Rime customisation, layered by Rime on top of the shared rime-data.
   custom = ./flypy.custom.yaml;
   # Manually maintained user dictionary (custom phrases, symbols, missing
diff --git a/home/base/tui/agents/packages.nix b/home/base/tui/agents/packages.nix
index 104f2c89..c22e8867 100644
--- a/home/base/tui/agents/packages.nix
+++ b/home/base/tui/agents/packages.nix
@@ -1,7 +1,6 @@
 {
   pkgs,
   llm-agents,
-  myNurPkgs,
   dsh-nu,
   ...
 }:
@@ -11,7 +10,7 @@ let
   # supplies the dsh installation it plugs into.
   dshNu = dsh-nu.lib.mkDshNuPackage {
     inherit pkgs;
-    dsh = myNurPkgs.dsh;
+    inherit (pkgs) dsh;
   };
 in
 {
@@ -23,7 +22,7 @@ in
     # dsh from nur-packages: llm-agents.nix's dsh cannot boot on nixpkgs node
     # (node-addon-require-builtin probe), this one shims it. The Nushell-only
     # plugin rides in through the package's withPlugins wrapper.
-    (myNurPkgs.dsh.withPlugins [ dshNu ])
+    (pkgs.dsh.withPlugins [ dshNu ])
 
     # Docs lookup CLI behind the find-docs skill (agents/skills/find-docs). The skill's flags are
     # written against this package, not against upstream's npx instructions.
diff --git a/home/linux/gui/i3/README.md b/home/linux/gui/i3/README.md
index be27b9dd..eef8ab5f 100644
--- a/home/linux/gui/i3/README.md
+++ b/home/linux/gui/i3/README.md
@@ -45,7 +45,7 @@ tree the agent reads, so it stays.
 - the generated `computer-use-init` script (exec'd by i3) publishes `DISPLAY`/`XDG_SESSION_TYPE` to
   the systemd user manager, clears any stale `WAYLAND_DISPLAY`, and enables the AT-SPI bridge via a
   gsettings key.
-- Drivers live in `overlays/cua-driver.nix` and `overlays/computer-use-linux.nix`.
+- Drivers come from the nur-ryan4yin overlay (`overlays/nur-ryan4yin.nix`).
 - Host wiring: `home/hosts/linux/idols-ruby.nix`, `home/hosts/linux/idols-kana.nix`,
   `hosts/idols-ruby/computer-use.nix`.
 
diff --git a/home/linux/gui/i3/default.nix b/home/linux/gui/i3/default.nix
index 15213eca..b0fea7ed 100644
--- a/home/linux/gui/i3/default.nix
+++ b/home/linux/gui/i3/default.nix
@@ -82,7 +82,7 @@ in
         xvfb # headless X server
       ]
       ++ [
-        # MCP server / CLI that drives the desktop (see overlays/computer-use-linux.nix).
+        # MCP server / CLI that drives the desktop (see overlays/nur-ryan4yin.nix).
         pkgs.computer-use-linux
       ]
       ++ lib.optional cfg.vnc pkgs.x11vnc
diff --git a/hosts/idols-ruby/packages.nix b/hosts/idols-ruby/packages.nix
index 88c42945..6d6a3d2d 100644
--- a/hosts/idols-ruby/packages.nix
+++ b/hosts/idols-ruby/packages.nix
@@ -1,7 +1,6 @@
 {
   pkgs,
   llm-agents,
-  myNurPkgs,
   ...
 }:
 let
@@ -87,6 +86,6 @@ in
       agentPackages.pi
       # dsh from nur-packages: llm-agents.nix's dsh cannot boot on nixpkgs node
       # (node-addon-require-builtin probe), this one shims it.
-      myNurPkgs.dsh
+      pkgs.dsh
     ];
 }
diff --git a/lib/macosSystem.nix b/lib/macosSystem.nix
index 079bc06f..3bcf4931 100644
--- a/lib/macosSystem.nix
+++ b/lib/macosSystem.nix
@@ -17,16 +17,13 @@ nix-darwin.lib.darwinSystem {
   modules =
     darwin-modules
     ++ [
-      (
-        { lib, ... }:
-        {
-          nixpkgs.pkgs = import nixpkgs-darwin {
-            inherit system; # refer the `system` parameter form outer scope recursively
-            # To use chrome, we need to allow the installation of non-free software
-            config.allowUnfree = true;
-          };
-        }
-      )
+      {
+        nixpkgs.pkgs = import nixpkgs-darwin {
+          inherit system; # refer the `system` parameter form outer scope recursively
+          # `nixpkgs.config` is ignored once `nixpkgs.pkgs` is set.
+          config = specialArgs.nixpkgsConfig;
+        };
+      }
     ]
     ++ (lib.optionals ((lib.lists.length home-modules) > 0) [
       home-manager.darwinModules.home-manager
diff --git a/outputs/default.nix b/outputs/default.nix
index a7c937fe..2af9b60f 100644
--- a/outputs/default.nix
+++ b/outputs/default.nix
@@ -73,16 +73,6 @@ let
           cudaCapabilities = [ "8.9" ];
         };
       };
-      # NUR packages for this system; modules use `myNurPkgs.dsh` instead of
-      # repeating `nur-ryan4yin.packages.${pkgs.stdenv.hostPlatform.system}`.
-      # Instantiate them with the same Nixpkgs policy as the host so npm
-      # fetchers inside NUR packages also use the mirror.
-      myNurPkgs = import "${inputs.nur-ryan4yin}" {
-        pkgs = import inputs.nixpkgs {
-          inherit system;
-          config = nixpkgsConfig;
-        };
-      };
     };
 
   # This is the args for all the haumea modules in this folder.
diff --git a/overlays/README.md b/overlays/README.md
index f113ec6f..70b05894 100644
--- a/overlays/README.md
+++ b/overlays/README.md
@@ -11,8 +11,7 @@ through [Overlays - NixOS & Flakes Book](https://nixos-and-flakes.thiscute.world
 overlays/
 ├── README.md
 ├── default.nix            # Entrypoint for all overlays
-├── computer-use-linux.nix # computer-use-linux from ryan4yin/nur-packages
-└── cua-driver.nix         # cua-driver from ryan4yin/nur-packages
+└── nur-ryan4yin.nix       # ryan4yin/nur-packages
 ```
 
 ## Components
@@ -23,6 +22,5 @@ The entrypoint imports every overlay file in this directory and applies it to th
 
 ### 2. Package overlays
 
-- `computer-use-linux.nix`: exposes `computer-use-linux` from the `nur-ryan4yin` flake input.
-- `cua-driver.nix`: exposes `cua-driver` from the `nur-ryan4yin` flake input (used by the
-  computer-use VMs).
+- `nur-ryan4yin.nix`: applies the `nur-ryan4yin` input's own overlay, which adds `dsh`,
+  `rime-data-flypy`, `computer-use-linux` and `cua-driver` to `pkgs`.
diff --git a/overlays/computer-use-linux.nix b/overlays/computer-use-linux.nix
deleted file mode 100644
index 64391c85..00000000
--- a/overlays/computer-use-linux.nix
+++ /dev/null
@@ -1,3 +0,0 @@
-{ myNurPkgs, ... }: _final: _prev: {
-  computer-use-linux = myNurPkgs.computer-use-linux;
-}
diff --git a/overlays/cua-driver.nix b/overlays/cua-driver.nix
deleted file mode 100644
index 15ccf3a2..00000000
--- a/overlays/cua-driver.nix
+++ /dev/null
@@ -1,3 +0,0 @@
-{ myNurPkgs, ... }: _final: _prev: {
-  cua-driver = myNurPkgs.cua-driver;
-}
diff --git a/overlays/nur-ryan4yin.nix b/overlays/nur-ryan4yin.nix
new file mode 100644
index 00000000..36c206fa
--- /dev/null
+++ b/overlays/nur-ryan4yin.nix
@@ -0,0 +1,2 @@
+# dsh, rime-data-flypy, computer-use-linux and cua-driver from ryan4yin/nur-packages.
+{ nur-ryan4yin, ... }: import "${nur-ryan4yin}/overlay.nix"