these 4 derivations will be built:
  /nix/store/4y3rfrscsl2nxnwfmw5vvanyxljnnb7i-iets-0.2.0.drv
  /nix/store/8prqf28ncy6w6alxjahf2bsjhfj1bgjp-iets-fuzz-diff-0.0.0.drv
  /nix/store/fxfm01n8xn4b9jrpnmpfkdj6k1xr532c-iets-conformance-adapter.drv
  /nix/store/sjs0khp8v8hv58zni87gv96ips99fw4h-nix-conformance-iets.drv