these 2 derivations will be built:
  /nix/store/abkl30xp45h0c6hqcwfiars7d4qhykjb-nixos-test-driver-pg_repack.drv
  /nix/store/iw7zdxl3p68hvzkcl58bkfdw3x5r5mg9-vm-test-run-pg_repack.drv