these 2 derivations will be built:
  /nix/store/87l44bsbfwm05zgzwjcs0a6ddlsfsjl4-nixos-test-driver-pg_partman.drv
  /nix/store/0ibyqch1w4ncqz4fsqlkh59fg66wna33-vm-test-run-pg_partman.drv