diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..3550a30f
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..e6a12f0e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+result*
+.direnv/
diff --git a/flake.nix b/flake.nix
index bc6912af..7ce3b449 100644
--- a/flake.nix
+++ b/flake.nix
@@ -62,6 +62,14 @@
 
       checks."${system}" = with lib; filterAttrs (n: isDerivation) pkgs.qchem.tests;
 
+      formatter."${system}" = pkgs.nixpkgs-fmt;
+
+      devShells."${system}".default = with pkgs; mkShell {
+        buildInputs = [
+          self.formatter."${system}"
+          statix
+        ];
+      };
 
       overlays = {
         qchem = qchemOvl;