these 2 derivations will be built:
  /nix/store/b80yyv4imi4r9lzcqplxxznkjc59rkkx-iets-conformance-adapter.drv
  /nix/store/0nwrdwpj03bqpc1vk9x0nfwpf5s3r2vd-nix-conformance-iets.drv