Actions:

1. Spin up brand new Ubuntu 16.04 EC2 instance
2. Run the get-started script via wget -qO- https://get.haskellstack.org/ | sh

Expected:

All system packages will be installed

Actual:

I get an error message because I haven't yet run apt-get update, system package installation fails, but Stack installation succeeds. In order to get the necessary packages, I then need to either (1) manually apt-get install them, or delete /usr/local/bin/stack and rerun the script after running apt-get update. I would expect one of two behaviors to occur:

1. If system package installation fails, do not install the stack exe
2. If apt-get install fails, run apt-get update

I'm guessing the former is more practical, while the latter could be tweaked to always run apt-get update