these 3 derivations will be built:
  /nix/store/9ficfcszsradskfqxlwajg191i5fyva7-ctx-2.2.4-vendor.drv
  /nix/store/sjwkrc3la8jf3v70j0q95vx2jkjpiqfp-ctx-2.2.4.drv
  /nix/store/ba8bda7qw3r6pjph2r33q8jb392649h1-check-ctx.drv