diff --git a/sci-ml/onnx/onnx-1.20.0.ebuild b/sci-ml/onnx/onnx-1.20.0.ebuild
index 3f2d90b2229e..93612ebdf18f 100644
--- a/sci-ml/onnx/onnx-1.20.0.ebuild
+++ b/sci-ml/onnx/onnx-1.20.0.ebuild
@@ -53,6 +53,7 @@ python_compile() {
 		"${mycmakeargs[@]}"
 		-Dnanobind_DIR="$(python_get_sitedir)/nanobind/cmake"
 	)
+	rm -rf .setuptools-cmake-build
 	CMAKE_ARGS="${mycmakeargs[@]}" distutils-r1_python_compile
 }