Using a saved question with variable to build another question

I created a question using custom SQL and added a variable called “StartDate”. I saved this question.
I now want to create another question with the query builder using the question I created earlier. My problem is there is no way to specify a value for the “StartDate” variable.

Hi @tuaris
Currently you cannot use filters on native query, when using that question as a nested query in Saved Questions.
You should remove the filter from the SQL and just use a filter in QB.
EDIT:
https://github.com/metabase/metabase/issues/6449
https://github.com/metabase/metabase/issues/7089