these 6 derivations will be built:
  /nix/store/rsm6bx738d90x7h78bpf995zbj87r3i8-run-nixos-vm.drv
  /nix/store/a2b4azwdg4xlhh1i9z1fpykkyzvriyx6-nixos-vm.drv
  /nix/store/yz0az3scri0dcc9a3ri2691q22r9cx6g-test-script.drv
  /nix/store/1fgkv5ivzgk56ak81583p5d89y510q77-driverConfiguration.json.drv
  /nix/store/0lzkr4i0607jfvfxvzsdfy1szix847kz-nixos-test-driver-pg_repack.drv
  /nix/store/jqj686z28bryjvj1f6zz5sghal1xjml8-vm-test-run-pg_repack.drv