these 4 derivations will be built:
  /nix/store/v5pcdlmr8apqmdh3jjjmvy14zjr4kfdj-source.drv
  /nix/store/66wlb1qkwycyysim5v69szjwp52wdx07-treehouse-3.1.3-go-modules.drv
  /nix/store/wd5xbgd046z6g9ib9a9l7y7s6a7j1rpk-treehouse-3.1.3.drv
  /nix/store/xqs5lvsvzy7w5gszx5z3a358p4n0zb5b-check-treehouse.drv