diff --git a/devenv.nix b/devenv.nix
index 90e4682..e6e1df4 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -33,6 +33,7 @@
   enterShell = ''
     hello
     git --version
+    alejandra --version
   '';
 
   # https://devenv.sh/tests/