these 2 derivations will be built:
  /nix/store/0y9ymw9qa428fxkqr8iisyhq9sjbnwnh-nix-grpc-store-0.1.0.drv
  /nix/store/483qgqgsr2q2cas5w0348r960mjwixf5-nix-grpc-store-exit-stress.drv