these 2 derivations will be built:
  /nix/store/dkllaplsgh98phgs3ilyg4sdhy8b5jnf-nixos-test-driver-pg_tle.drv
  /nix/store/m5wc1kfgq1wix9f7c7583fhpnkkn5prg-vm-test-run-pg_tle.drv