diff --git a/systems/jeeves/runners/nix_builder.nix b/systems/jeeves/runners/nix_builder.nix
index 81a27af..8667f8f 100644
--- a/systems/jeeves/runners/nix_builder.nix
+++ b/systems/jeeves/runners/nix_builder.nix
@@ -109,6 +109,7 @@ let
           nixfmt
           nixos-rebuild
           nodejs
+          ruff
           treefmt
           wget
         ];