these 2 derivations will be built:
  /nix/store/wrbr473bs5qrqsn090hrb233yvdli5d7-nix-grpc-store-0.2.2.drv
  /nix/store/5z7xdn41vg928sad6sps63zd7s4fky8c-nix-grpc-store-exit-stress.drv