Use the repo as flake for private dots

nixcfgs/flake.lock

@@ -750,6 +750,26 @@
         "type": "github"
       }
     },
+    "nix-index-database": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763870992,
+        "narHash": "sha256-NPyc76Wxmv/vAsXJ8F+/8fXECHYcv2YGSqdiSHp/F/A=",
+        "owner": "nix-community",
+        "repo": "nix-index-database",
+        "rev": "d7423982c7a26586aa237d130b14c8b302c7a367",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-index-database",
+        "type": "github"
+      }
+    },
     "nixcord": {
       "inputs": {
         "flake-compat": "flake-compat",
@@ -1105,6 +1125,7 @@
         "niri-flake": "niri-flake",
         "nix-darwin": "nix-darwin",
         "nix-flatpak": "nix-flatpak",
+        "nix-index-database": "nix-index-database",
         "nixcord": "nixcord",
         "nixpkgs": "nixpkgs_5",
         "nixpkgs-stable": "nixpkgs-stable_2",