diff --git a/flake.nix b/flake.nix
index 49e9923..39800c2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,7 @@
             esphome
             esptool
             cc2538-bsl
+            zsh # for ./reflash.sh
           ];
 
           shellHook = ''