these 4 derivations will be built:
  /nix/store/0sa4p99vsy72qr1ldhr24bayrk5bjvw0-iets-fuzz-diff-0.0.0.drv
  /nix/store/aa1sdj2s9z6536zdgdj6q7xii22psc6b-iets-0.2.0.drv
  /nix/store/9j4sv9cml0yk0p7xx50v9ljvp9sl6vm0-iets-conformance-adapter.drv
  /nix/store/vzr0vgm680mg7f545crqipmcihiza3a2-nix-conformance-iets.drv