these 3 derivations will be built:
  /nix/store/1knhsbpqx2m2iqrxbpshi71p8p3y3xbl-anyhow-1.0.104.drv
  /nix/store/4ls7ig50vw0l3lwq8zzxa369nbcn89lb-cargo-vendor-dir.drv
  /nix/store/qx616yydzf5vf38bx884xab6kwgwl0gg-fast-nix-gc-proptest-0.1.0.drv