diff --git a/checks/default.nix b/checks/default.nix
index d1ba484..96e9244 100644
--- a/checks/default.nix
+++ b/checks/default.nix
@@ -35,9 +35,6 @@ in
     clean = myLib.mkTypstDerivation {
       src = myLib.cleanTypstSource ./clean;
       EXPECTED_SRC = ./clean-expected;
-      nativeBuildInputs = with pkgs; [
-        tree
-      ];
       buildPhaseTypstCommand = ''
         diff -r "$src" "$EXPECTED_SRC"
         touch $out