these 4 derivations will be built:
  /nix/store/kgf8nlskc762ak2bginsqh7rxvvb8l1j-source.drv
  /nix/store/2f9l8iycga2svwi4099yb9v2q0ndfrnh-ctx-1.1.0-vendor-staging.drv
  /nix/store/wdj079aa7k8k1sfaxiii3pm23fw8g0nl-ctx-1.1.0-vendor.drv
  /nix/store/74xlnms2zx15bz520zaiyf7wmq67xy0d-ctx-1.1.0.drv