these 4 derivations will be built:
  /nix/store/nb6ckjlh4cdx6yl1v7rmhkx2xx1qx6p0-iets-0.1.0.drv
  /nix/store/qap7gmz2n2h4a03pqciw7a0dvrc244ix-iets-fuzz-diff-0.0.0.drv
  /nix/store/11hxlw18r76jylgfj2ailk578pg7pz9n-iets-conformance-adapter.drv
  /nix/store/5kg4dbg005q21mjfi3gb3m8hb4la5gfk-nix-conformance-iets.drv