these 3 derivations will be built:
  /nix/store/3j63yhf3rp34bxvff9hmxfxa14kzik2y-iets-0.1.0.drv
  /nix/store/lyfiy9k2gja6m65siyh94255sfb60mhg-iets-conformance-adapter.drv
  /nix/store/43p7fh73ffr881r0s9r1wn17i8br6l42-nix-conformance-iets.drv