these 4 derivations will be built:
  /nix/store/mqfbns7fhvwgp2vqnafx66s9gy3gjwgc-iets-0.1.0.drv
  /nix/store/wsi4jkxniwqy6xnmpxina5cmz2b3rgax-iets-fuzz-diff-0.0.0.drv
  /nix/store/5siwnd62wmpz0299a9q32540mq9wrmm1-iets-conformance-adapter.drv
  /nix/store/rrwblsmrnvd0gx0lid6iwwzhkvw6bhi7-nix-conformance-iets.drv