diff --git a/crates/cxx-qt-build/src/lib.rs b/crates/cxx-qt-build/src/lib.rs
index f205f7f88..08ac3609f 100644
--- a/crates/cxx-qt-build/src/lib.rs
+++ b/crates/cxx-qt-build/src/lib.rs
@@ -537,7 +537,7 @@ impl CxxQtBuilder {
             builder.flag_if_supported("-Wa,-mbig-obj");
             // macOS
             builder.flag_if_supported(&format!("-mmacosx-version-min={}", macos_deployment_target));
-            builder.file("broken.cpp");
+            builder.file(&format!("{}/broken.cpp", env!("CARGO_MANIFEST_DIR"));
             // Enable Qt Gui in C++ if the feature is enabled
             #[cfg(feature = "qt_gui")]
             builder.define("CXX_QT_GUI_FEATURE", None);