these 2 derivations will be built:
  /nix/store/9v9q9b0a1xdfgv5vp4g5kfny4120ajf6-nixos-test-driver-pg_tle.drv
  /nix/store/56wzir5096nhj8bnnbjld6cfcb2ck9m6-vm-test-run-pg_tle.drv