diff --git a/.woodpecker/debug.yaml b/.woodpecker/debug.yaml
index b6603bc3..65dab9ab 100644
--- a/.woodpecker/debug.yaml
+++ b/.woodpecker/debug.yaml
@@ -8,7 +8,7 @@ when:
   - manual
 
 steps:
-  - name: fmt
+  - name: check formatting
     image: nixpkgs/nix:nixos-22.05
     commands:
       - nix-shell --attr devShell --run "cargo fmt -- --check"
diff --git a/flake.lock b/flake.lock
index 59ff5c67..aff248fe 100644
--- a/flake.lock
+++ b/flake.lock
@@ -80,16 +80,17 @@
         ]
       },
       "locked": {
-        "lastModified": 1738376888,
-        "narHash": "sha256-S6ErHxkSm0iA7ZMsjjDaASWxbELYcdfv8BhOkkj1rHw=",
+        "lastModified": 1736649126,
+        "narHash": "sha256-XCw5sv/ePsroqiF3lJM6Y2X9EhPdHeE47gr3Q8b0UQw=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "83284068670d5ae4a43641c4afb150f3446be70d",
+        "rev": "162ab0edc2936508470199b2e8e6c444a2535019",
         "type": "github"
       },
       "original": {
         "owner": "oxalica",
         "repo": "rust-overlay",
+        "rev": "162ab0edc2936508470199b2e8e6c444a2535019",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index 2675b303..ccaeba29 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,14 +6,15 @@
   inputs.nixpkgs.url =
     "github:NixOS/nixpkgs/7c4869c47090dd7f9f1bdfb49a22aea026996815";
 
-  inputs.flake-compat.url = "github:nix-community/flake-compat";
-
-  inputs.flake-utils.url = "github:numtide/flake-utils";
+  # Rust overlay as of 2025-01-12
+  inputs.rust-overlay.url =
+  "github:oxalica/rust-overlay/162ab0edc2936508470199b2e8e6c444a2535019";
+  inputs.rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
 
   inputs.crane.url = "github:ipetkov/crane";
 
-  inputs.rust-overlay.url = "github:oxalica/rust-overlay";
-  inputs.rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
+  inputs.flake-compat.url = "github:nix-community/flake-compat";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
 
   outputs = { self, nixpkgs, flake-utils, crane, rust-overlay, ... }:
     let
@@ -68,6 +69,9 @@
             full = pkgs.mkShell {
               buildInputs = with pkgs; [
                 targets.toolchain
+                protobuf
+                clang
+                mold
                 # ---- extra packages for dev tasks ----
                 rust-analyzer
                 cargo-audit