Cabal hack night suggestions

Hi all, There are a few people in my local FP meetup group looking into doing some semi-regular Haskell hack nights, and we're hoping to target various tools and libraries in the Haskell ecosystem so that we can give back a little while having fun and honing our skills. Cabal is pretty high on our list of things to hack on, and we're hoping to start mid next week. I'm sure we'll be able to click through github issues and submit pull requests on our own, but I thought I'd ask if anyone has any thoughts on areas that would be good to look at that might sit in a sweet spot of being both beneficial to Cabal and accessible to newcomers to the code. Does anyone have any thoughts? Cheers, Dave