gardener-metrics-exporter fails with msg="open : no such file or directory" about gardener-metrics-exporter HOT 4 CLOSED

# move to repo and deploy values.yaml
cd $GOPATH/src/github.com/gardener/gardener-metrics-exporter
cat <<EOF > dev/values.yaml
image:
  tag: 0.0.0
EOF

# deploy test ns
$ kubectl create ns test >/dev/null

# deploy helm chart
$ helm upgrade gardener-metrics-exporter $GOPATH/src/github.com/gardener/gardener-metrics-exporter/charts/gardener-metrics-exporter --install --force --wait --values dev/values.yaml --namespace test
Release "gardener-metrics-exporter" does not exist. Installing it now.
NAME:   gardener-metrics-exporter
LAST DEPLOYED: Fri Oct  5 16:28:46 2018
NAMESPACE: test
STATUS: DEPLOYED

RESOURCES:
==> v1/Service
NAME                       TYPE       CLUSTER-IP      EXTERNAL-IP  PORT(S)   AGE
gardener-metrics-exporter  ClusterIP  10.110.164.247  <none>       2718/TCP  2s

==> v1/Deployment
NAME                       DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
gardener-metrics-exporter  1        1        1           1          2s

==> v1/Pod(related)
NAME                                        READY  STATUS       RESTARTS  AGE
gardener-metrics-exporter-5ddb5d5f7c-9g5c6  1/1    Running      0         2s

==> v1/ServiceAccount
NAME                       SECRETS  AGE
gardener-metrics-exporter  1        2s

==> v1/ClusterRole
NAME                                 AGE
garden.sapcloud.io:metrics-exporter  2s

==> v1/ClusterRoleBinding
NAME                                 AGE
garden.sapcloud.io:metrics-exporter  2s

$ k -n test get pod
NAME                                         READY     STATUS    RESTARTS   AGE
gardener-metrics-exporter-5ddb5d5f7c-9g5c6   1/1       Running   0          35s