these 5 derivations will be built:
  /nix/store/7mdgdvhxlml439i3xv3da5wxz5c18ima-source.drv
  /nix/store/zav1dipa58w5wjclikp2kf8zl9p7jy29-vendor-registry.drv
  /nix/store/m85vs2q6lngc606d2xl8z15dlwpjbgqb-vendor-cargo-deps.drv
  /nix/store/1b3kryzc9cwv415y1p7ls8vss8na3psx-harmonia-deps-3.2.0.drv
  /nix/store/z5q37hhymznbn3kz7anzm0jd6v5428fh-harmonia-llvm-cov-3.2.0.drv