these 2 derivations will be built:
  /nix/store/lw2x8k064mhyw23j0kn268p6fdzzvm9h-nixos-test-driver-pg_tle.drv
  /nix/store/xpaq73159lnkkqz38z3jmckv1yi9458k-vm-test-run-pg_tle.drv