these 4 derivations will be built:
  /nix/store/p5ynixpx6kb3nkpzw3fcpvcs3kw4hw2w-Cargo.toml.drv
  /nix/store/pds924d9fzf4r1jp6z8vxybwjxnqfyl0-source.drv
  /nix/store/6mwbr1h2h40z3aakd2rbxk94l9q37qsk-iets-fuzz-diff-deps-0.0.0.drv
  /nix/store/0bksiaajj3ddlya09vnvmsjzb3xcjn09-iets-fuzz-diff-0.0.0.drv