these 4 derivations will be built:
  /nix/store/5qdjjbwqzcj8n1jb3pswfmwc32bhmjp5-source.drv
  /nix/store/mn3a8nx94hm3adx7zib05iqkz0bkf9a2-treehouse-3.1.6-go-modules.drv
  /nix/store/g5kjcgfz7z39xn9iqail3lakg6cg5m48-treehouse-3.1.6.drv
  /nix/store/gnmwv8pb8c2ymshmv4d8qrnxs9p1683z-check-treehouse.drv