these 4 derivations will be built:
  /nix/store/11i6868wzj71hrr575pd1jmbxy65sgw7-Cargo.toml.drv
  /nix/store/dyyg330af0h82z0bw8f9jrki328yfhl2-source.drv
  /nix/store/4qghj5dzyzdmbv48ds7fslcndsdlk990-harmonia-deps-3.2.0.drv
  /nix/store/2y7rd19bzsi0sxysiwz6hbbrk12fw7g9-harmonia-clippy-3.2.0.drv