diff --git a/makefiles/targets/sterile.mk b/makefiles/targets/sterile.mk
index c661f53..f5922ee 100644
--- a/makefiles/targets/sterile.mk
+++ b/makefiles/targets/sterile.mk
@@ -31,6 +31,7 @@
 ## -----------------------------------------------------------------------
 .PHONY: sterile
 sterile :: clean
+	$(if $(sterile-dirs),$(RM) -r $(sterile-dirs))
 
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------