diff --git a/tongfang/nixos/flake.lock b/tongfang/nixos/flake.lock
index 2fac904..d5e603d 100644
--- a/tongfang/nixos/flake.lock
+++ b/tongfang/nixos/flake.lock
@@ -1,39 +1,5 @@
 {
   "nodes": {
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1696426674,
-        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1705309234,
-        "narHash": "sha256-uNRRNRKmJyCRC/8y1RqBkqWBLM034y4qN7EprSdmgyA=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "1ef2e671c3b0c19053962c07dbda38332dcebf26",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 0,
@@ -62,42 +28,10 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
-      "locked": {
-        "lastModified": 1708161998,
-        "narHash": "sha256-6KnemmUorCvlcAvGziFosAVkrlWZGIc6UNT9GUYr0jQ=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "84d981bae8b5e783b3b548de505b22880559515f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "nixpkgs": "nixpkgs",
-        "zen-browser": "zen-browser",
-        "zig": "zig"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
+        "zen-browser": "zen-browser"
       }
     },
     "zen-browser": {
@@ -117,26 +51,6 @@
         "repo": "zen-browser-flake",
         "type": "github"
       }
-    },
-    "zig": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs_3"
-      },
-      "locked": {
-        "lastModified": 1730722337,
-        "narHash": "sha256-tvbAprVy34KXPywdbPhIW9+0ZfrHvmtaGWSk16dg/Z8=",
-        "owner": "mitchellh",
-        "repo": "zig-overlay",
-        "rev": "efff314a4daabec1de625a1780e774fdaea50605",
-        "type": "github"
-      },
-      "original": {
-        "owner": "mitchellh",
-        "repo": "zig-overlay",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/tongfang/nixos/flake.nix b/tongfang/nixos/flake.nix
index 2071b5b..760bcdb 100644
--- a/tongfang/nixos/flake.nix
+++ b/tongfang/nixos/flake.nix
@@ -3,7 +3,6 @@
 
   inputs = {
     zen-browser.url = "github:0xc000022070/zen-browser-flake";
-    zig.url = "github:mitchellh/zig-overlay";
   };
 
   outputs = { self, nixpkgs, ... }@inputs: {
diff --git a/tongfang/nixos/packages.nix b/tongfang/nixos/packages.nix
index e9cd9a8..5acdb8f 100644
--- a/tongfang/nixos/packages.nix
+++ b/tongfang/nixos/packages.nix
@@ -26,8 +26,9 @@ in
     '')
     dig
     caligula
-    inputs.zig.packages."${system}".default
+    zig
+    zls
     spotify
-    texlive.combined.scheme-full 
+    texlive.combined.scheme-full
   ];
 }
diff --git a/tongfang/nixos/services.nix b/tongfang/nixos/services.nix
index 796325b..4c4954a 100644
--- a/tongfang/nixos/services.nix
+++ b/tongfang/nixos/services.nix
@@ -23,6 +23,9 @@
 
   # Enable security-related service for realtime audio tasks
   security.rtkit.enable = true;
+  
+  # Enable to update some devices' firmware
+  services.fwupd.enable = true;
 
   # Steam, Tailscale, and other programs/services
   programs.steam.enable = true;