these 2 derivations will be built:
  /nix/store/hx76anij25jz8r8z2k43kjj6v6al5nyn-nixos-test-driver-plpgsql_check.drv
  /nix/store/0hh8ffpac1jdh3hrd17q5x6cs2g4z75a-vm-test-run-plpgsql_check.drv