diff --git a/pkgs/by-name/lu/lux-cli/package.nix b/pkgs/by-name/lu/lux-cli/package.nix
index d2558db26135..60e68cea02a4 100644
--- a/pkgs/by-name/lu/lux-cli/package.nix
+++ b/pkgs/by-name/lu/lux-cli/package.nix
@@ -59,7 +59,9 @@ rustPlatform.buildRustPackage (finalAttrs: {
     LUX_SKIP_IMPURE_TESTS = 1; # Disable impure unit tests
   };
 
-  cargoTestFlags = "--lib"; # Disable impure integration tests
+  cargoTestFlags = [
+    "--lib" # Disable impure integration tests
+  ];
 
   nativeCheckInputs = [
     lua5_4