diff --git a/flake.nix b/flake.nix
index 0f35833..4fa1cb6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,7 +34,10 @@
           # packages.default =
           devShells.default = pkgs.mkShell {
             ENVIRONMENT = "dev";
-            nativeBuildInputs = with pkgs; [ go ];
+            nativeBuildInputs = with pkgs; [
+              go
+              mailpit
+            ];
           };
         };
     };