these 4 derivations will be built:
  /nix/store/f3w8cyzgkxf0d1jpgcbmkzrkx2fl8ryq-iets-0.1.0.drv
  /nix/store/hf71xp1jznf45mhhv801qxm93i8nfqnw-iets-fuzz-diff-0.0.0.drv
  /nix/store/cfhism4r43pvdavk2wryzj5x0yrf64c2-iets-conformance-adapter.drv
  /nix/store/m480d780797x69fk6nhcvsmqxx8mp489-nix-conformance-iets.drv