these 5 derivations will be built:
  /nix/store/rf3fx6dh7cqw10g34fnadni28xgnqrsd-source.drv
  /nix/store/qc55f9jb2rcmpxx970j7hmipqpdx68n9-ctx-2.2.7-vendor-staging.drv
  /nix/store/zmb9c4pr90l9kvh8vixqbxw26kb1mclm-ctx-2.2.7-vendor.drv
  /nix/store/k05i4kfky4qlajxiw01qslbf9nlbfz52-ctx-2.2.7.drv
  /nix/store/v3slyc578z33kyx9m688bfi8abmqsvk4-check-ctx.drv