these 2 derivations will be built:
  /nix/store/5srgv47h66q7nmjmqibqnq7sjl7d99iy-nixos-test-driver-pg_partman.drv
  /nix/store/h6wil96894gf8za97bw08a98x3hl68pk-vm-test-run-pg_partman.drv