these 4 derivations will be built:
  /nix/store/pxnfbhy387zzyizakdbgrdiww45gvvk7-Cargo.toml.drv
  /nix/store/6q62pqp4hrxv0cpvfpb04z22hdgw2cnx-source.drv
  /nix/store/j57zj3x2s8sn32mdcb71598ngw47a7mi-harmonia-deps-3.1.0.drv
  /nix/store/c48cxv3k6k7vcwyiirmhwnzy3yjgh9sc-harmonia-clippy-3.1.0.drv