these 2 derivations will be built:
  /nix/store/7m63zi43mzlc0j24ymlnfzkhpvjhrlxk-nix-grpc-store-0.2.3.drv
  /nix/store/nlal0z2vvg64d78vf1ccpgnfg9l6cjc5-nix-grpc-store-exit-stress.drv