these 4 derivations will be built:
  /nix/store/31lzf1gm59k7wfgi6ygfay72airwlajk-Cargo.toml.drv
  /nix/store/li8n376fzq6nfwfjs7nhrmkrq8i7wp6w-source.drv
  /nix/store/aay69qh8hcw409dra7n3ihz2k8h38irj-harmonia-deps-3.1.0.drv
  /nix/store/s5vb78n3sw6nik5pslqr8n1mq8hv3xhl-harmonia-clippy-3.1.0.drv