these 2 derivations will be built:
  /nix/store/818bqs8cmai4vvspaifpnjvkjyk0g12x-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/yc2kz4dr3y5swyi4z1rivhl11j96ig4j-nix-grpc-store-exit-stress.drv