these 2 derivations will be built:
  /nix/store/rnk7znpl83vdw3iz682rr20p24vfr08n-nix-grpc-store-0.2.2.drv
  /nix/store/wmmw8ns8rw5pqx1zly1p28f9mx9sd991-nix-grpc-store-exit-stress.drv