these 2 derivations will be built:
  /nix/store/nacny57zd58pxfpjwh7drm7c4kq5b0g0-nixos-test-driver-plpgsql_check.drv
  /nix/store/ckdww6iij1q0kzy43sbr9b4hp4xfqq77-vm-test-run-plpgsql_check.drv