these 4 derivations will be built:
  /nix/store/3a03jn0is0sf37hwwymziq8wkbsivjb0-iets-fuzz-diff-0.0.0.drv
  /nix/store/fcrx6gzi0xgrs6465sj780sypar8dhj8-iets-0.1.0.drv
  /nix/store/xbz3q9g8wv9szk05wmcsqpaz7lnykm3q-iets-conformance-adapter.drv
  /nix/store/hk20lpxw72fzjaff2pvaa0sb974lq0aj-nix-conformance-iets.drv