helm: Error: file "helm install stable/nginx-ingress" not found (and mysql doesn't work either)

So, I’m following the Quick Start Guide: https://github.com/kubernetes/helm

Neither stable/nginx-ingress nor stable/mysql work.

$ helm repo update

Hang tight while we grab the latest from your chart repositories...
...Skip local chart repositoryh...Successfully got an update from the "stable" chart repository
...Successfully got an update from the "deis" chart repository
Update Complete. ⎈ Happy Helming!⎈

# ignoring that the output looks bad... there's at least one newline missing...

$ helm install stable/nginx-ingress
Error: file "stable/nginx-ingress" not found

$ helm install stable/mysql
Error: release muddled-aardvark failed: Deployment.extensions "muddled-aardvark-mysql" is invalid: spec.template.spec.initContainers[0].imagePullPolicy: Required value

Version info:

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.3", GitCommit:"029c3a408176b55c30846f0faedf56aae5992e9b", GitTreeState:"clean", BuildDate:"2017-02-15T06:40:50Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.3", GitCommit:"029c3a408176b55c30846f0faedf56aae5992e9b", GitTreeState:"clean", BuildDate:"2017-02-15T06:34:56Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}

$ helm version
Client: &version.Version{SemVer:"v2.2.0", GitCommit:"fc315ab59850ddd1b9b4959c89ef008fef5cdf89", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.2.0", GitCommit:"fc315ab59850ddd1b9b4959c89ef008fef5cdf89", GitTreeState:"clean"}