feat(core): add nix-index-database module

flake.lock

@@ -899,6 +899,26 @@
         "type": "github"
       }
     },
+    "nix-index-database": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1785650611,
+        "narHash": "sha256-q4kR7g+pCcz6NASvoVPYu+CWWUurX03wogtBqGmR4h0=",
+        "owner": "nix-community",
+        "repo": "nix-index-database",
+        "rev": "dbc756c9d7287de19b3e0e38c928c47510d42c3e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-index-database",
+        "type": "github"
+      }
+    },
     "nixcord": {
       "inputs": {
         "flake-parts": "flake-parts_3",
@@ -1268,6 +1288,7 @@
         "lan-mouse": "lan-mouse",
         "lanzaboote": "lanzaboote",
         "mango": "mango",
+        "nix-index-database": "nix-index-database",
         "nixcord": "nixcord",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_9",

flake.nix

@@ -49,6 +49,11 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    nix-index-database = {
+      url = "github:nix-community/nix-index-database";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
     import-tree.url = "github:vic/import-tree";
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-25.11-small";

modules/flake/overlays.nix

@@ -13,6 +13,8 @@
       hyprland-git = inputs.hyprland.packages.${prev.stdenv.hostPlatform.system};
       awww = inputs.awww.packages.${prev.stdenv.hostPlatform.system}.awww;
       vicinae-extensions = inputs.vicinae-extensions.packages.${prev.stdenv.hostPlatform.system};
+      nix-index-small =
+        inputs.nix-index-database.packages.${prev.stdenv.hostPlatform.system}.nix-index-with-small-db;
     };
 
     stable-packages = final: _prev: {

modules/nixos/core/nix-index.nix

@@ -0,0 +1,13 @@
+{ inputs, ... }:
+{
+  flake.modules.nixos.core = { pkgs, ... }: {
+    imports = [
+      inputs.nix-index-database.nixosModules.default
+    ];
+
+    programs = {
+      nix-index.package = pkgs.nix-index-small;
+      nix-index-database.comma.enable = true;
+    };
+  };
+}