these 4 derivations will be built:
  /nix/store/dizwq8fmm9ka1hpn0kc3z7dp1dc806a2-iets-0.2.0.drv
  /nix/store/hswj3y3a0fg6lz9lq9kk03xz8n5xvw5x-iets-fuzz-diff-0.0.0.drv
  /nix/store/j2zb1j06wab2zx83m9rx93nr6nmig1pr-iets-conformance-adapter.drv
  /nix/store/1hdbvzqgs8s3949b4yixfcm1wj24kx61-nix-conformance-iets.drv