these 3 derivations will be built:
  /nix/store/ybij6dc9mabrplyid5a6ynjp3j948mrc-iets-0.1.0.drv
  /nix/store/gv1a0y4fpz22h580d4d2mvkcgpbd2v0z-iets-conformance-adapter.drv
  /nix/store/b32yyamk4nc609p5g88jcvdkfkjjx9kz-nix-conformance-iets.drv