these 4 derivations will be built:
  /nix/store/2g482ah1dr286rskiq7hqv0v79fkl6vn-iets-fuzz-diff-0.0.0.drv
  /nix/store/ls4ii4cmrsh1kikphxhiwvpdyjr893hg-iets-0.2.0.drv
  /nix/store/bcrl9vpsjkjlwr9spfbcb1m6rxf1wwal-iets-conformance-adapter.drv
  /nix/store/scswq73wkknv2n5f2ah7cjl3nq8ibwp6-nix-conformance-iets.drv