these 5 derivations will be built:
  /nix/store/wgic3vkr6vf3iha737ryhxwsdim8f04p-source.drv
  /nix/store/ykibrmq56nbpjlkc8c0qip7ipsmmmxaq-ctx-2.1.0-vendor-staging.drv
  /nix/store/0h8jzvyadi2crri8w68gbqwirlx6s9lc-ctx-2.1.0-vendor.drv
  /nix/store/5xgmb3j73fypaacsdyb3rc09a7b18izx-ctx-2.1.0.drv
  /nix/store/64k1508qqr0ggv73jrz1b8f6vwg5zkbn-check-ctx.drv