these 4 derivations will be built:
  /nix/store/gp3f3xh1pizjc0aypqf1zh97yy2sslv2-iets-fuzz-diff-0.0.0.drv
  /nix/store/xyfva9p6fphi6sd3ivj1lpc4rd1b2qgi-iets-0.1.0.drv
  /nix/store/pjag6n6gqkl04i5dg5bzh52665yp31d6-iets-conformance-adapter.drv
  /nix/store/3cscs9y0can6sfch74y8lwc6rkbhvq31-nix-conformance-iets.drv