diff --git a/cluster/juju/util.sh b/cluster/juju/util.sh
index 3e11583ba01..3a2442ddec0 100755
--- a/cluster/juju/util.sh
+++ b/cluster/juju/util.sh
@@ -31,6 +31,8 @@ function verify-prereqs() {
 }
 
 function build-local() {
+    # Make a clean environment to avoid compiler errors.
+    make clean
     # Build the binaries locally that are used in the charms.
     make all WHAT="cmd/kube-apiserver cmd/kubectl cmd/kube-controller-manager plugin/cmd/kube-scheduler cmd/kubelet cmd/kube-proxy"
     OUTPUT_DIR=_output/local/bin/linux/amd64