these 4 derivations will be built:
  /nix/store/k0iqnd19ljvgs9gbjn3i8crkm18pjmkx-iets-fuzz-diff-0.0.0.drv
  /nix/store/my5nrbbc7pf4chvnkrfzqy74kb62ybvz-iets-0.1.0.drv
  /nix/store/wpmrv864p5m53h2w468s9kpd6fxm2630-iets-conformance-adapter.drv
  /nix/store/26krxjsqs2g8qa6yrxcbwhcya0gn4nlq-nix-conformance-iets.drv