these 2 derivations will be built:
  /nix/store/k59hi76pmd0hk1k4q84rmmdgmk5gafhl-nixos-test-driver-pg_partman.drv
  /nix/store/yqaafiji1413b4q5w8y2vw2b0f6yppyx-vm-test-run-pg_partman.drv