these 2 derivations will be built:
  /nix/store/6jvv0j3qzgacipp1i4d5brh33jy3vhsi-nix-grpc-store-0.2.0.drv
  /nix/store/c1zxlb83s1p7hznf0xajl2j8fyp082jz-nix-grpc-store-exit-stress.drv