these 3 derivations will be built:
  /nix/store/f9zaipl35pnqrd2i4kpkyyaly4sp8wm0-ctx-1.2.2-vendor-staging.drv
  /nix/store/5ih7yrf8pdsapkjd64h1by6p77k6zlqb-ctx-1.2.2-vendor.drv
  /nix/store/jihry1wh259zii0c4fphl55yr76gyj55-ctx-1.2.2.drv