Apparently the 'keys' hook also depends on the output
Apparently the 'keys' hook also depends on the output

My assumptions that the hook output was always ignored were wrong :disappointed:... I believe the last fix should have resolved this as well, but we'll explicitly list it for good measure.

Resolves #531

nanobox-io/nanobox,nanobox-io/nanobox-cli,nanobox-io/nanobox-cli,pagodabox/nanobox-cli,nanobox-io/nanobox,nanobox-io/nanobox-cli,pagodabox/nanobox-cli