add clean with long parameter

diff --git a/Makefile b/Makefile
index 097ea49238fa0bb99724ed38c9ee63f92422dfb3..cc5dda5d6b284cbdaa22669d322a1627e71a9e63 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ build: $(BINDIR)/backup \
 package: $(BUILDDIR)/$(PACKAGENAME).deb
 
 clean:
-       rm -rf build
+       rm --recursive --force build
 
 $(BUILDDIR)/$(PACKAGENAME)/DEBIAN/control:
        mkdir --parents $(@D)