these 2 derivations will be built:
  /nix/store/l4yzlv0srzlvw23x2lpkmnzghp7rk5az-nixos-test-driver-pg_partman.drv
  /nix/store/bmnb64703zgjbidiib01sczbkgbh3x06-vm-test-run-pg_partman.drv