I cloned the kubernetes/kubernetes github repository and followed the given tasks to run the kubernetes cluster locally like

mkdir -p $GOPATH/src/k8s.io
cd $GOPATH/src/k8s.io
git clone https://github.com/kubernetes/kubernetes
cd kubernetes
make

and my startup hack/local-up-cluster.sh is failing with

Waiting for apiserver to come up
!!! [0524 22:38:39] Timed out waiting for apiserver:  to answer at https://127.0.0.1:6443/healthz; tried 60 waiting 1 between each
check apiserver logs: /tmp/kube-apiserver.log
Cleaning up...

My logs can be found here: https://gist.github.com/PascalKu/6f671a45385d685228a269c0bcab00f4