diff --git a/build/Makefile b/build/Makefile
index 74b803ac..957d59ef 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -102,9 +102,8 @@ build-basecoin: git-branch
 ###
 
 # set app_version
-#version-%: $(GOPATH)/bin/%
-version-%:
-	test -n "$(BUILD_NUMBER)"
+version-%: $(GOPATH)/bin/%
+	test -z "$(BUILD_NUMBER)" && echo "BUILD_NUMBER is not set" && false
 	$(eval $*_version=$(shell $< version | head -1 | cut -d- -f1 | sed 's/^\(ethermint:\s*\|\)\(v\|\)//' | tr -d '\t ' ))
 
 # set build_folder