src/nacltest.bash | 1 +

diff --git a/src/nacltest.bash b/src/nacltest.bash
index 33fc8c1c4eddaa44e8cfe35484e07bdc6886a4b1..e5bbb4b683fb1e0b9f4693f76fac60e571f25724 100755
--- a/src/nacltest.bash
+++ b/src/nacltest.bash
@@ -45,6 +45,7 @@ 	echo 'nacl.bash must be run from $GOROOT/src' 1>&2
 	exit 1
 fi
 GOOS=$GOHOSTOS GOARCH=$GOHOSTARCH ./make.bash
+unset GOROOT
 
 # Build zip file embedded in package syscall.
 gobin=${GOBIN:-$(pwd)/../bin}