Planner output is empty when using Fast Downward

[victorpaleologue]

When running the PDDL test using the following planner configuration

        {
            "kind": "COMMAND",
            "path": "/Users/victor.paleologue/Code/Palaio/HTN/downward/fast-downward.py",
            "syntax": "$(planner) --alias=lama $(options) $(domain) $(problem)",
            "title": "fast-downward.py",
            "canConfigure": true
        }

I get the output in a file called sas_plan, but not displayed in the output panel. The VSCode extension does not leverage the --plan-file option, nor has any sort of contract with FD, which is a widely used planner.