diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index 0214a90..6f087dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
+.direnv/
 *.qcow2
 result
\ No newline at end of file
diff --git a/flake.nix b/flake.nix
index eac3d8d..e9a42ff 100644
--- a/flake.nix
+++ b/flake.nix
@@ -75,5 +75,15 @@
         modules = [ ./hosts/test-vm/configuration.nix ];
       };
     };
+
+    devShells = let
+      system = "x86_64-linux";
+      pkgs = inputs.nixpkgs.legacyPackages.${system};
+    in
+      {
+        ${system}.default = pkgs.mkShell {
+          packages = [ pkgs.nixfmt-rfc-style ];
+        };
+      };
   };
 }