these 2 derivations will be built:
  /nix/store/5rribs46pcrwqy3ppm8hia1zri25329j-nix-grpc-store-0.2.0.drv
  /nix/store/fhdxzvjasdsfcbs5yhqsfy8xxx13x44c-nix-grpc-store-exit-stress.drv