these 3 derivations will be built:
  /nix/store/lhv0izw3g4hy8pjiwcfgiy2pscbffliz-ctx-2.2.4-vendor.drv
  /nix/store/lyzdlklxg2snmfkqrnk2xxfgnlh0dazk-ctx-2.2.4.drv
  /nix/store/cplqz16pw1qffm6bsx8c9q9kk07amp4h-check-ctx.drv