these 4 derivations will be built:
  /nix/store/s9l7cpg955m8qn17gwc85hxj0mancmp2-Cargo.toml.drv
  /nix/store/886nllfc48pxlbn572pd9wz36vpkd135-source.drv
  /nix/store/qs9wn1p4d8bg7b0maqvriif0sc41ds3g-harmonia-deps-3.3.0.drv
  /nix/store/2nwp6d3zk6ry4r0snhy40rzzpjdrcrmn-harmonia-clippy-3.3.0.drv