these 3 derivations will be built:
  /nix/store/p04xa8kv6mjq6blzdg298gvgpv02irh6-embedded-io-0.7.1.drv
  /nix/store/75bp4z3f7xg1af6gjngbi15k0yf282ix-cargo-vendor-dir.drv
  /nix/store/wjh2lrgycllxm9cjsj5m7f9gcx6q9k0p-nix-ld.drv