diff --git a/Makefile b/Makefile
index 0eeb8ed..4424ee7 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ typo3DatabaseHost ?= "127.0.0.1"
 
 .PHONY: install
 install:
-	rm .Build
+	rm -rf .Build
 	COMPOSER_PROCESS_TIMEOUT=1000 composer require -vvv --dev --prefer-source typo3/cms="$(TYPO3_VERSION)"
 
 	git checkout composer.json