these 2 derivations will be built:
  /nix/store/vl6s1814h95pr67ij7xcwfrdz9qa3cwh-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/2libffh59qhp99jlw6p5dc5f4ski8m18-nix-grpc-store-exit-stress.drv