these 2 derivations will be built:
  /nix/store/99c2bsqhnqbxhmkw98c2ldmybz1k209x-nixos-test-driver-pg_partman.drv
  /nix/store/25l15v9gw43g9m5jf7li5ch8yhjhfm88-vm-test-run-pg_partman.drv