diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 59d049d..139cb06 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -11,12 +11,11 @@ repos:
 
   - repo: local
     hooks:
-      - id: nixpkgs-fmt
+      - id: nix-fmt
         name: Check nix formatting
-        entry: nixfmt
+        entry: nix fmt
         language: system
         files: .*\.nix$
-        args: [-c]
         stages: [pre-commit]
 
       - id: prettier
@@ -24,7 +23,7 @@ repos:
         entry: prettier
         language: system
         files: .*\.(css|scss|js|ts|yaml)$
-        args: [-c]
+        args: [--write]
         stages: [pre-commit]
 
       - id: typos
@@ -34,3 +33,11 @@ repos:
         files: .*
         exclude: .*\.(png|jpg|jpeg|age)
         stages: [pre-commit]
+
+      - id: deadnix
+        name: Check for dead nix code
+        entry: deadnix
+        language: system
+        files: .+\.nix$
+        args: ["-e", "-l"]
+        stages: [pre-commit]
diff --git a/flake.nix b/flake.nix
index 83de59f..caa8fd8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -72,9 +72,9 @@
           devShells.default = pkgs.mkShell {
             buildInputs = with pkgs; [
               pre-commit
-              nixfmt-rfc-style
               nodePackages.prettier
               typos
+              deadnix
               inputs'.agenix.packages.default
             ];
             shellHook = ''