these 4 derivations will be built:
  /nix/store/p2fcfbvz5xwx98gmszlpfxn7ji9kg905-source.drv
  /nix/store/9lbgdx6yprncq1q126psj6by8jmxqki7-herdr-0.8.0-vendor-staging.drv
  /nix/store/qmvvi8n9zw46b10d05r7g3my8cfbl1w0-herdr-0.8.0-vendor.drv
  /nix/store/nndk3gacxidspsqhvwxhmy72j66i77y2-herdr-0.8.0.drv