these 2 derivations will be built:
  /nix/store/zqmj3synfi0v89s3w95vzrc32hf7mwps-nixos-test-driver-pg_tle.drv
  /nix/store/8aac73a5il92hhzp2kvbcgf7sb1fwj1n-vm-test-run-pg_tle.drv