diff --git a/build/env.sh b/build/env.sh
index 3914555d1..af560305b 100755
--- a/build/env.sh
+++ b/build/env.sh
@@ -20,7 +20,8 @@ fi
 
 # Set up the environment to use the workspace.
 GOPATH="$workspace"
-export GOPATH
+GO15VENDOREXPERIMENT=1
+export GOPATH GO15VENDOREXPERIMENT
 
 # Run the command inside the workspace.
 cd "$ethdir/go-ethereum"