diff --git a/Makefile b/Makefile
index 990d22ae8354..f3a924d51fe8 100644
--- a/Makefile
+++ b/Makefile
@@ -184,11 +184,13 @@ godocs:
 build-docs:
 	@cd docs && \
 	while read -r branch path_prefix; do \
-		(git checkout $${branch} && npm install && VUEPRESS_BASE="/$${path_prefix}/" npm run build) ; \
+		echo "building branch $${branch}" ; \
+		(git clean -fdx && git reset --hard && git checkout $${branch} && npm install && VUEPRESS_BASE="/$${path_prefix}/" npm run build) ; \
 		mkdir -p ~/output/$${path_prefix} ; \
 		cp -r .vuepress/dist/* ~/output/$${path_prefix}/ ; \
 		cp ~/output/$${path_prefix}/index.html ~/output ; \
 	done < versions ;
+	
 .PHONY: build-docs
 
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