these 4 derivations will be built:
  /nix/store/3g8q2lpr7a7z1qi50mxzylpdw654nszf-iets-0.1.0.drv
  /nix/store/kw50vrpw3cdlh4v26h6pwab81fvfljnp-iets-fuzz-diff-0.0.0.drv
  /nix/store/afd5pcb7a4w9i7l4d1nsgkssw1mk37af-iets-conformance-adapter.drv
  /nix/store/fslrch76p5f50425r448gp7f6jisj0rl-nix-conformance-iets.drv