these 4 derivations will be built:
  /nix/store/740465pji8glkglw9x5s449wsipv1qd0-Cargo.toml.drv
  /nix/store/mpgscgqvm7hk75sxl64yikr8x8jmall7-source.drv
  /nix/store/ypczmw2y4xrgxddr1d81nv0a0g5c1rm2-harmonia-deps-3.2.0.drv
  /nix/store/g9kpxbd0c0f27194qrkkr4hb7m0lf6y0-harmonia-clippy-3.2.0.drv