these 2 derivations will be built:
  /nix/store/djadmgs4jr3hbk3zy93npz8qh9ybhljf-nix-grpc-store-0.2.1.drv
  /nix/store/cgpvdr24nw85q2y3dxrba61mjsn2jqv0-nix-grpc-store-exit-stress.drv