diff --git a/Makefile b/Makefile
index 3638c60..e5d99d6 100644
--- a/Makefile
+++ b/Makefile
@@ -116,9 +116,8 @@ $(PREFIX)/bin/x86_64-elf-gcc: $(PREFIX)/bin/x86_64-elf-objcopy ./build-gcc
 	@echo It is located in the cross-cc subdirectory.
 
 clean:
-	@mkdir -p build-gcc build-binutils
-	@rm -rf build-gcc
-	@rm -rf build-binutils
+	cd build-gcc && make clean
+	cd build-binutils && make clean
 	@rm -rf cross-cc
 	-@rm -rf $(GCC_NAME)/gcc/config/i386/t-x86_64-elf
 	-@echo ${CL2}[$@] ${CL}Success.${CL3}