nixpkgs follow?

flake.lock

@@ -1,5 +1,25 @@
 {
   "nodes": {
+    "backgrounds": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1719630871,
+        "narHash": "sha256-laSbApuWgBoDLJUzeJKSGiqP8wwxXXQ/XnIJKihezqk=",
+        "ref": "refs/heads/main",
+        "rev": "42d5fff03e9a8aa5ad8a1dac45be209ca12b66d5",
+        "revCount": 8,
+        "type": "git",
+        "url": "https://git.zynh.me/Zynh0722/backgrounds"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.zynh.me/Zynh0722/backgrounds"
+      }
+    },
     "fish_theme": {
       "flake": false,
       "locked": {
@@ -254,6 +274,7 @@
     },
     "root": {
       "inputs": {
+        "backgrounds": "backgrounds",
         "fish_theme": "fish_theme",
         "home-manager": "home-manager",
         "neovim-overlay": "neovim-overlay",

flake.nix

@@ -18,6 +18,7 @@
 
     backgrounds = {
       url = "git+https://git.zynh.me/Zynh0722/backgrounds";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
   };