these 2 derivations will be built:
  /nix/store/z3zvksq6skkf85jcjbcq7kq0xrp1l4ia-nix-grpc-store-0.1.0.drv
  /nix/store/l2lj5p8ifn1i5f9ims7jk6bsb1av7kc8-nix-grpc-store-exit-stress.drv