diff --git a/Makefile b/Makefile
index 4a96f96..03f44cb 100644
--- a/Makefile
+++ b/Makefile
@@ -59,10 +59,10 @@
 	ls -la /usr/lib/llvm-14/lib || true
 	ls -la /usr/lib/llvm-10/lib || true
 	which -a clang++-10 || true
-	update-alternatives --install /usr/bin/clang clang `which clang-10` 20 || true
-	update-alternatives --install /usr/bin/clang++ clang++ `which clang++-10` 20 || true
-	update-alternatives --set clang `which clang-10` || true
-	update-alternatives --set clang++ `which clang++-10` || true
+	sudo update-alternatives --install /usr/bin/clang clang `which clang-10` 20 || true
+	sudo update-alternatives --install /usr/bin/clang++ clang++ `which clang++-10` 20 || true
+	sudo update-alternatives --set clang `which clang-10` || true
+	sudo update-alternatives --set clang++ `which clang++-10` || true
 	clang++ -v || true
 	$(MACOSX_CXX) $< -o $@ -v || true
 	$(MACOSX_CXX) $< -o $@ -v -O0 || true