flake: Fix nur evaluation warning, clean up dependencies

flake.lock

@@ -364,26 +364,12 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1733392399,
-        "narHash": "sha256-kEsTJTUQfQFIJOcLYFt/RvNxIK653ZkTBIs4DG+cBns=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "d0797a04b81caeae77bcff10a9dde78bc17f5661",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nur": {
       "inputs": {
         "flake-parts": "flake-parts",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {

flake.nix

@@ -70,7 +70,10 @@
       url = "github:Mic92/nix-index-database";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    nur.url = "github:nix-community/NUR";
+    nur = {
+      url = "github:nix-community/NUR";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     systems.url = "github:nix-systems/default";
     tetris = {
       url = "github:chvp/tetris";
@@ -110,11 +113,11 @@
         agenix.overlays.default
         accentor.overlays.default
         devshell.overlays.default
-        emacs-overlay.overlay
+        emacs-overlay.overlays.default
         (self: super: {
           tetris = tetris.packages.${self.system}.default;
         })
-        nur.overlay
+        nur.overlays.default
         www-chvp-be.overlays.default
       ];
       commonModules = [