these 2 derivations will be built:
  /nix/store/rs27yabz2p774c84qb6f4dmcrl83471v-nixos-test-driver-pg_tle.drv
  /nix/store/i3flyj165lkrkraa3d07dz2a524vd0ld-vm-test-run-pg_tle.drv