I don't plan on keeping up with the site since I'm not that good at writing Haskell code. And it takes forever for me to complete a single answer because of the searches I make, or tutorials I read while coding the answer ;)
To solve your stuff, run:
stack exec aoc2016 -- questionLabel input_file
a questionLabel is numerical Day combined with question id as a letter, as in:
Day 1 - Question 2 : 1b