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/flake.nix b/flake.nix
index 94a8af6..59d46f8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,6 +8,21 @@
     inherit (nixpkgs) lib;
     pkgs = nixpkgs.legacyPackages.${system};
   in {
+    devShells.${system} = {
+      default = pkgs.mkShell {
+        packages = with pkgs; [
+          (python3.withPackages (ppkgs: with ppkgs; [
+            beautifulsoup4
+            markdown2
+            matrix-nio
+            mysql-connector
+            requests
+          ]))
+          ruff
+        ];
+      };
+    };
+
     packages.${system} = {
       default = self.packages.${system}.pvv-calendar-bot;
       pvv-calendar-bot = pkgs.python3Packages.buildPythonPackage {