these 2 derivations will be built:
  /nix/store/w0yrfb8r5d8s5i8y5gr08y18v04cz868-nix-grpc-store-0.1.0.drv
  /nix/store/96hpql7bw4p9qaxamyjmlm4b9brswi5r-nix-grpc-store-exit-stress.drv