diff --git a/flake.nix b/flake.nix
index 8ceafa6..f99f76c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -62,6 +62,7 @@
         ./flake/wrappers.nix
         ./flake/dev-shells.nix
         ./flake/formatter.nix
+        ./flake/checks.nix
       ];
     };
 }
diff --git a/flake/checks.nix b/flake/checks.nix
new file mode 100644
index 0000000..67e8063
--- /dev/null
+++ b/flake/checks.nix
@@ -0,0 +1,26 @@
+{ self, inputs, ... }:
+{
+  perSystem =
+    { pkgs, ... }:
+    {
+      checks = {
+        treefmt = (import ./treefmt.nix { inherit inputs pkgs; }).check self;
+
+        statix =
+          let
+            statix-config = pkgs.writeText "statix.toml" ''
+              disabled = ["repeated_keys"]
+            '';
+          in
+          pkgs.runCommand "statix" { buildInputs = [ pkgs.statix ]; } ''
+            statix check ${self} --config ${statix-config}
+            mkdir $out
+          '';
+
+        deadnix = pkgs.runCommand "deadnix" { buildInputs = [ pkgs.deadnix ]; } ''
+          deadnix ${self} --fail --exclude ${self}/flake/formatter.nix
+          mkdir $out
+        '';
+      };
+    };
+}
diff --git a/flake/formatter.nix b/flake/formatter.nix
index cdccc7b..1d884b7 100644
--- a/flake/formatter.nix
+++ b/flake/formatter.nix
@@ -3,14 +3,6 @@
   perSystem =
     { pkgs, ... }:
     {
-      formatter =
-        (inputs.treefmt-nix.lib.evalModule pkgs {
-          projectRootFile = "flake.nix";
-          programs = {
-            nixfmt.enable = true;
-            prettier.enable = true;
-            just.enable = true;
-          };
-        }).config.build.wrapper;
+      formatter = (import ./treefmt.nix { inherit inputs pkgs; }).wrapper;
     };
 }
diff --git a/flake/treefmt.nix b/flake/treefmt.nix
new file mode 100644
index 0000000..af14ed2
--- /dev/null
+++ b/flake/treefmt.nix
@@ -0,0 +1,9 @@
+{ inputs, pkgs, ... }:
+(inputs.treefmt-nix.lib.evalModule pkgs {
+  projectRootFile = "flake.nix";
+  programs = {
+    nixfmt.enable = true;
+    prettier.enable = true;
+    just.enable = true;
+  };
+}).config.build
diff --git a/justfile b/justfile
index 10706c8..4a65232 100644
--- a/justfile
+++ b/justfile
@@ -22,3 +22,6 @@ update:
 
 fmt:
     nix fmt
+
+check:
+    nix flake check