these 2 derivations will be built:
  /nix/store/p3fvq6wpd42li9l5dkizqxjbldr0xr7a-nixos-test-driver-pg_hashids.drv
  /nix/store/fmqx4xxdqqx88gdcgly2kyjp7d4sa0r4-vm-test-run-pg_hashids.drv