flake: remove duplicate nixpkgs input

flake.lock

@@ -360,7 +360,9 @@
     "nixos-generators": {
       "inputs": {
         "nixlib": "nixlib",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1769813415,
@@ -393,22 +395,6 @@
       }
     },
     "nixpkgs": {
-      "locked": {
-        "lastModified": 1736657626,
-        "narHash": "sha256-FWlPMUzp0lkQBdhKlPqtQdqmp+/C+1MBiEytaYfrCTY=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "2f9e2f85cb14a46410a1399aa9ea7ecf433e422e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
       "locked": {
         "lastModified": 1771848320,
         "narHash": "sha256-0MAd+0mun3K/Ns8JATeHT1sX28faLII5hVLq0L3BdZU=",
@@ -458,7 +444,7 @@
         "lanzaboote": "lanzaboote",
         "nixos-generators": "nixos-generators",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs",
         "srvos": "srvos",
         "terranix": "terranix"
       }

flake.nix

@@ -40,6 +40,7 @@
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
 
     nixos-generators.url = "github:nix-community/nixos-generators";
+    nixos-generators.inputs.nixpkgs.follows = "nixpkgs";
 
     clan-core.url = "git+https://git.clan.lol/clan/clan-core";
     clan-core.inputs.nixpkgs.follows = "nixpkgs";