flake: use latest nil lsp

flake.lock

@@ -641,6 +641,26 @@
         "type": "github"
       }
     },
+    "nil": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1750558251,
+        "narHash": "sha256-wmb+kcqG05jQA2RPq+KZhOeCxSEOAgumgp/remOsczs=",
+        "owner": "oxalica",
+        "repo": "nil",
+        "rev": "4e5ac6ec65c775fbc6adba1c6022b29c7eccde0f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "nil",
+        "type": "github"
+      }
+    },
     "nix-filter": {
       "locked": {
         "lastModified": 1731533336,
@@ -955,6 +975,7 @@
         "latest": "latest",
         "lix": "lix",
         "lix-module": "lix-module",
+        "nil": "nil",
         "nix-index-database": "nix-index-database",
         "nix-minecraft": "nix-minecraft",
         "nixos-hardware": "nixos-hardware",

flake.nix

@@ -45,6 +45,7 @@
     lix.url = "https://git.lix.systems/lix-project/lix/archive/main.tar.gz";
     lix-module.url = "https://git.lix.systems/lix-project/nixos-module/archive/main.tar.gz";
     hydra.url = "https://git.lix.systems/lix-project/hydra/archive/main.tar.gz";
+    nil.url = "github:oxalica/nil";
 
     ## Minecraft
     nix-minecraft.url = "github:Infinidoge/nix-minecraft";
@@ -117,6 +118,7 @@
     lix.inputs.flake-compat.follows = "blank";
     lix.inputs.nixpkgs.follows = "nixpkgs";
     lix.inputs.pre-commit-hooks.follows = "git-hooks";
+    nil.inputs.nixpkgs.follows = "nixpkgs";
     nix-index-database.inputs.nixpkgs.follows = "nixpkgs";
     nix-minecraft.inputs.flake-compat.follows = "blank";
     nix-minecraft.inputs.flake-utils.follows = "flake-utils";
@@ -210,6 +212,7 @@
 
                     # --- Domain-Specific Overlays
                     inputs.agenix.overlays.default
+                    inputs.nil.overlays.default
                     inputs.nix-minecraft.overlay
                     inputs.qtile.overlays.default
                     inputs.rust-overlay.overlays.default