these 2 derivations will be built:
  /nix/store/cifcz7r04xmv9wxcxw2s4b1nnfjymflp-envoy-nixos.json.drv
  /nix/store/bgjgzkx12s7ahbfpfdp8gjpljasy74v3-nix-grpc-farm-helm-check.drv