these 4 derivations will be built:
  /nix/store/gzsjbsvkj2bsb4s5giah5599fbnxd4ll-source.drv
  /nix/store/i6r61mbapbdzsasqgmhi1q6s25hdkvkc-ctx-1.2.0-vendor-staging.drv
  /nix/store/7dxx0qgbw1kfschfabab268w0hvrbp4g-ctx-1.2.0-vendor.drv
  /nix/store/qd5wh5mllw38j3w67kqs2kcvlfxjzdwh-ctx-1.2.0.drv