Caching / avoiding rebuilding dependencies specific to .stack-work

[bitemyapp]

Our CI server keeps rebuilding these every time we run the tests. I'm trying to prebuild the dependencies but that doesn't seem to work. I believe they're partly a result of our extra-deps in the stack.yaml:

extra-deps:
- gravatar-0.8.0
- hashids-1.0.2.2
- uuid-aeson-0.1.0.0
- monad-logger-0.3.18

I remember there being a ticket about this before, but I couldn't find it via Github or Google search. Is there anything we can do?

[mgsloan]

You could cache your root .stack-work directory

This will also be resolved by #1265