diff --git a/home/programs/terminal/tools/default.nix b/home/programs/terminal/tools/default.nix
index 6ece1ab..00fcb55 100644
--- a/home/programs/terminal/tools/default.nix
+++ b/home/programs/terminal/tools/default.nix
@@ -12,5 +12,6 @@ _: {
     ./btop.nix
     ./bottom.nix
     ./bat.nix
+    ./nix-index.nix
   ];
 }
diff --git a/home/programs/terminal/tools/nix-index.nix b/home/programs/terminal/tools/nix-index.nix
new file mode 100644
index 0000000..241e136
--- /dev/null
+++ b/home/programs/terminal/tools/nix-index.nix
@@ -0,0 +1,15 @@
+{ config, ... }: {
+  programs = {
+    # nix-index is a file database for nixpkgs
+    # this provides `nix-locate` command.
+    nix-index = {
+      enable = true;
+      enableBashIntegration = config.programs.bash.enable;
+      enableZshIntegration = config.programs.zsh.enable;
+    };
+
+    # Allows interactive shells to show which Nix package (if any)
+    # provides a missing command.
+    command-not-found.enable = true;
+  };
+}