diff --git a/Makefile b/Makefile
index af5ce76..85844a9 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@ all:
 	./helloworld
 
 gocui:
+	GO111MODULE=off go build -v -x
 	./helloworld --gui gocui >/tmp/helloworld.stdout 2>&1
 
 goimports: