diff --git a/darwin.nix b/darwin.nix
index a7d973d..891c043 100644
--- a/darwin.nix
+++ b/darwin.nix
@@ -54,6 +54,9 @@
       "com.apple.mouse.tapBehavior" = 1;
       "com.apple.trackpad.scaling" = 0.875;
     };
+    ".GlobalPreferences" = {
+      "com.apple.mouse.scaling" = 0.5;
+    };
     trackpad = {
       Dragging = true;
       Clicking = true;
@@ -87,7 +90,7 @@
   homebrew = {
     enable = true;
     casks = (import ./cask.nix) ++ (lib.attrByPath [ "extras" "casks" ] [ ] host);
-    taps = [];
+    taps = [ ];
     global = {
       autoUpdate = true;
     };
@@ -95,7 +98,7 @@
       autoUpdate = true;
       upgrade = true;
       cleanup = "zap";
-      extraFlags = ["--force" ];
+      extraFlags = [ "--force" ];
     };
   };
 }
diff --git a/home/pkgs.nix b/home/pkgs.nix
index bcb44bc..67efba4 100644
--- a/home/pkgs.nix
+++ b/home/pkgs.nix
@@ -11,6 +11,9 @@ with pkgs;
   posting
   opencode
 
+  # TUI
+  (callPackage ../pkgs/crtui.nix { })
+
   # NVim
   nvs
   lua
diff --git a/pkgs/crtui.nix b/pkgs/crtui.nix
new file mode 100644
index 0000000..347d1e9
--- /dev/null
+++ b/pkgs/crtui.nix
@@ -0,0 +1,45 @@
+{
+  lib,
+  stdenv,
+  fetchzip,
+}:
+let
+  version = "0.4.1";
+  plat = {
+    "aarch64-darwin" = "darwin_arm64";
+    "x86_64-darwin" = "darwin_amd64";
+    "aarch64-linux" = "linux_arm64";
+    "x86_64-linux" = "linux_amd64";
+  };
+in
+stdenv.mkDerivation {
+  pname = "crtui";
+  inherit version;
+
+  src = fetchzip {
+    url = "https://github.com/ksckaan1/crtui/releases/download/v${version}/crtui_${version}_${
+      plat.${stdenv.hostPlatform.system}
+        or (throw "crtui: unsupported platform ${stdenv.hostPlatform.system}")
+    }.tar.gz";
+    hash = "sha256-Rue9l2dZR8J6+XCV4HGOvYywklDa9jq4I6IUlhmtTF8=";
+    stripRoot = false; # tarball has no single top-level dir
+  };
+
+  # Prebuilt binary: skip fixup so llvm-strip does not invalidate the
+  # ad-hoc Mach-O signature macOS arm64 requires.
+  dontFixup = true;
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm755 $src/crtui $out/bin/crtui
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Terminal-based container registry management tool";
+    homepage = "https://github.com/ksckaan1/crtui";
+    license = lib.licenses.mit;
+    mainProgram = "crtui";
+    platforms = builtins.attrNames plat;
+  };
+}