these 3 derivations will be built:
  /nix/store/v00rbqr9d3h645hmr0fafxr6ykn57kdj-ctx-1.4.9-vendor-staging.drv
  /nix/store/vkwd0xf4kz194gnpj16sblqmhfn6km05-ctx-1.4.9-vendor.drv
  /nix/store/0m0gkvqvna74y7mbsnrs3sxc5yk91x1r-ctx-1.4.9.drv