these 2 derivations will be built:
  /nix/store/pb7am9zyjc63lj3ywcz9y5krj51l05n3-iets-conformance-adapter.drv
  /nix/store/0n2cnbkg4vy6r5r0xfl4q095n6k1ka2j-nix-conformance-iets.drv