these 2 derivations will be built:
  /nix/store/21krvh22wd84zpwqnq1053vc8p6fd435-nixos-test-driver-pg_partman.drv
  /nix/store/lpimhm2895vm4zsnhvlz3h6mv6kfiy1d-vm-test-run-pg_partman.drv