these 2 derivations will be built:
  /nix/store/54swhjibq83ym21c7bx4d9bff5a9i54c-nix-grpc-store-0.2.2.drv
  /nix/store/l825701dx848ka5hkjgylpxiy2skf4s2-nix-grpc-store-exit-stress.drv