these 4 derivations will be built:
  /nix/store/0nnpd85f0alw8fcib2q51wqmndalil56-iets-fuzz-diff-0.0.0.drv
  /nix/store/bfd8blq5bzb5svcys599njbbjpyj9qh3-iets-0.1.0.drv
  /nix/store/3zalkfj3n3a4b81dagfcp7ysz1zx8fr2-iets-conformance-adapter.drv
  /nix/store/ychbdwcv2ff6in0bjgmzgi9h1bzsg9nw-nix-conformance-iets.drv