these 4 derivations will be built:
  /nix/store/2l1mzyc5fj3fg7ngf0cz1gpyyp5l5k9l-Cargo.toml.drv
  /nix/store/p8qbvxp6kv16kx0r7f7vxvc5827f0mvx-source.drv
  /nix/store/nckana8l11szyfyw9s8r2agnb4qlvysa-harmonia-deps-3.2.0.drv
  /nix/store/2yfsvrrgcnxrkayj3qynzliqaiwr7kvz-harmonia-clippy-3.2.0.drv