these 2 derivations will be built:
  /nix/store/3agnd4yqx15f6h3m5jsvjf0s3dsaaqf8-nixos-test-driver-pg_partman.drv
  /nix/store/34c4a56binyybszv2fcjbp6mrhrq9pkr-vm-test-run-pg_partman.drv