these 3 derivations will be built:
  /nix/store/grj18n8yjmkz0r1x3zmv060q8hsmq4wj-herdr-0.9.5-vendor.drv
  /nix/store/0w1qmgxqkn2d93yxaqwdr2xya7qkkfbd-herdr-0.9.5.drv
  /nix/store/cfb4h2rscjwpi8hjhlbmy8mzdaz3m6h4-check-herdr.drv