diff --git a/flake.nix b/flake.nix
index d764922..5148e64 100644
--- a/flake.nix
+++ b/flake.nix
@@ -30,6 +30,7 @@
         buildInputs = [
           pkgs.cargo
           pkgs.rustc
+          pkgs.rustfmt
           nac3.packages.x86_64-linux.llvm-nac3
           nac3.packages.x86_64-linux.llvm-tools-irrt
         ];