unzip not installed and results in errors

[Justin-DynamicD]

fairly simple really, but the module doesn't actually check/validate if unzip s actually installed and thus can return errors when called from "minimal" linux boxes (aka base installs with no optional features). As you already require stdlib for use, I think adding an ensure_packages statement would be helpful to ensure "expected" operation.

[nanliu]

See documentation setup section for recommended configuration, we leave the dependencies up to the user to specify since it varies across environments and there isn't a single good default.