these 4 derivations will be built:
  /nix/store/h1kc218s9lcr3qhp07pxx58frklp1s7g-iets-fuzz-diff-0.0.0.drv
  /nix/store/j7pzmk6n6wzdnlc3g5xhwzlgprj3j463-iets-0.1.0.drv
  /nix/store/mldz71lcjyymh42dinlzpa2yg71aqryc-iets-conformance-adapter.drv
  /nix/store/h8pnrg1y7jplz9rcqj13j5xh1x1v2l5q-nix-conformance-iets.drv