these 4 derivations will be built:
  /nix/store/j2hgykfcv8v2i6bh6qaq0cjy70q89xn1-iets-fuzz-diff-0.0.0.drv
  /nix/store/zda4yi56dvmnvgpphak7zsmm40a5n6vm-iets-0.1.0.drv
  /nix/store/3gakswfq0w609jv5l5lml7v9fly298h6-iets-conformance-adapter.drv
  /nix/store/mdhprwqjkri31jx9d35nhf5qzmk6zsdy-nix-conformance-iets.drv