我按照以下说明操作：http://kubernetes.io/docs/getting-started-guides/mesos/#deploy-kubernetes-mesos
git clone https://github.com/kubernetes/kubernetes
cd kubernetes
export KUBERNETES_CONTRIB=mesos
make
-bash-4.2$ pwd
~/kubernetes
-bash-4.2$ ls
api contrib federation Makefile release
build CONTRIB.md Godeps Makefile.generated_files test
CHANGELOG.md CONTRIBUTING.md hack _output third_party
cluster DESIGN.md hooks pkg Vagrantfile
cmd docs LICENSE plugin vendor
code-of-conduct.md examples logo README.md www
-bash-4.2$ make
make: *** No rule to make target `/*.go', needed by `_output/bin/deepcopy-gen'. Stop.
我需要在make之前做点什么吗？