these 4 derivations will be built:
  /nix/store/m242qg6437b4qg2hyp18aydbrgd2jivm-Cargo.toml.drv
  /nix/store/ki9sz6xpi0ayg9zy66j64hjp5qr3ywnc-source.drv
  /nix/store/28ya1s3nn4lqj8wymzkh104bbkggw002-harmonia-deps-3.2.0.drv
  /nix/store/rqhqrc8mfnn79kjwaia9l1g2rv9x40y2-harmonia-3.2.0.drv