these 2 derivations will be built:
  /nix/store/f18h2ray8sd1pp3ww5n37ck6n67jkpfp-nix-grpc-store-0.2.3.drv
  /nix/store/b6dh4k6381q0j0jdnv7i5b264wvbn0zd-nix-grpc-store-exit-stress.drv