these 7 derivations will be built:
  /nix/store/wv2w12iqqgnjl921vdm77z5l487xfziz-cargo-src-syn-3.0.9.drv
  /nix/store/7phzc0dhkybfxhnjpxg3ipv73z3xipnw-cargo-package-syn-3.0.9.drv
  /nix/store/43nzp08kd3r3pzs04xs97myfkxzahqsd-vendor-registry.drv
  /nix/store/qadbspdq0h2ly6ycvbg6b7g8i981x8bv-vendor-cargo-deps.drv
  /nix/store/pxza9n3zyrpsgd4y6lmm18whjp72vp0k-source.drv
  /nix/store/zqj4xm0wqsv2gpw1zq2qpmhj0q45nn53-harmonia-deps-3.3.0.drv
  /nix/store/3ia3n6w3x3g6biwi7dmznng3a9bn6c93-harmonia-llvm-cov-3.3.0.drv