these 2 derivations will be built:
  /nix/store/r90yfjgija3a472wz000ijn5jsc3ipqx-nixos-test-driver-pg_hashids.drv
  /nix/store/l0s9c6c88glvxw1k9p0glnfh6lrpchcp-vm-test-run-pg_hashids.drv