these 5 derivations will be built:
  /nix/store/zj5lhiak507y4dr2pfar41r5cswi65xf-source.drv
  /nix/store/mhd18lx76x7xk6vydy72ajap2khkbaa8-ctx-1.6.2-vendor-staging.drv
  /nix/store/p1hr9d4hmpz5g6qj8wnwmq0waj34q9ja-ctx-1.6.2-vendor.drv
  /nix/store/arlgbwzqpn6rq9kw1bqn2w2dwc7hmnyd-ctx-1.6.2.drv
  /nix/store/hn0dpg4d5k2ydvc8m4pbfazglff8yikk-check-ctx.drv