these 2 derivations will be built:
  /nix/store/dqlpds8c08hyp1kf538w93j6r2shww95-nix-grpc-store-0.2.3.drv
  /nix/store/jbdzhmfpp9lxai1w53zaj0bhzg10qrn2-nix-grpc-store-exit-stress.drv