diff --git a/common/default.nix b/common/default.nix
index dc6cc3a..f2bbb1b 100644
--- a/common/default.nix
+++ b/common/default.nix
@@ -62,6 +62,7 @@
     picocom
     lf
     gnumake
+    tree
   ];
 
   nixpkgs.config.allowUnfree = true;