these 8 derivations will be built:
  /nix/store/xwxibnx0vnjg8s9d7msg4aw1l1kpizc0-cargo-src-proptest-derive-0.9.0.drv
  /nix/store/bgsfph367nzg377vv32nz639ksn6xg7q-cargo-package-proptest-derive-0.9.0.drv
  /nix/store/mjz1yklfryn4lxbsa5qr601wk7cvw5j6-vendor-registry.drv
  /nix/store/0zknwy19ydjm4bc2rd8akvlh49fbnam0-vendor-cargo-deps.drv
  /nix/store/xnfwlcqvfdd242c77llc05v7ps7wzyn3-Cargo.toml.drv
  /nix/store/xdr41gvhqxcaz3njf2p3fqhsqgqplym7-source.drv
  /nix/store/hbdajrzafvg8kz83jj6yfhq98829qd19-harmonia-deps-3.3.0.drv
  /nix/store/jxhq2fgcxvrh92gbmv2xd8pwbsxphypk-harmonia-llvm-cov-3.3.0.drv